A dewatering system 1a comprises: a first holding member 101 including a first hot plate 101a capable of generating heat; a second holding member 102 including a second hot plate 102b capable of generating heat; a driving unit 4 capable of causing a pressing mechanism to press the first holding member 101 and/or the second holding member 102; a heating unit 3 capable of heating the first hot plate 101a and the second hot plate 102a; and a control unit 2a which, during a dewatering process, controls the driving unit 4 so that a veneer is pressed by the first holding member 101 and the second holding member 102, and also controls the heating unit 3 so that the temperature of the first hot plate 101a is lower than the temperature of the second hot plate 102a.
F26B 3/20 - Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source being a heated surface
F26B 5/14 - Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringingDrying solid materials or objects by processes not involving the application of heat by brushingDrying solid materials or objects by processes not involving the application of heat by wiping
Supporting tables 8, 9 for supporting both edges 90a, 90b of a veneer 90 are arranged when both edges 90a, 90b are scarfed using circular saws 40a, 41a. Supporting tables 8, 9 include pressing units 56, 57 for pressing both edges 90a, 90b, circular saw contacting sections 54, 55 for receiving the circular saws 40a, 41a, and auxiliary conveyors 60, 62 for transporting both edges 90a, 90b in a transporting direction TD. Pressing units 56, 57 are configured to press both edges 90a, 90b against at least the auxiliary conveyors 60, 62. Auxiliary conveyors 60, 62 are arranged adjacent to the circular saw contacting sections 54, 55. Both edges 90a, 90b transported in the transporting direction TD are pressed by the pressing units 56, 57, reducing a friction acting on both edges 90a, 90b in the direction opposite to the transporting direction TD.
[Problem] To provide a scarfing device that contributes to both an improvement in productivity and achievement of an excellent scarf surface. [Solution] In a state in which the two end parts 90a, 90b of a single sheet 90 are pressed by pressing parts 56, 57, a scarf surface is processed into the two end parts 90a, 90b. The two end parts 90a, 90b are then transported in a transport direction TD using auxiliary conveyors 60, 62; therefore, friction acting on the two end parts 90a, 90b in the transport direction TD and in the opposite direction thereto can be reduced. Additionally, the pressing parts 56, 57 do not face endless belts BLT, BLT; therefore, in a state in which the single sheet 90 is not being transported, the pressing parts 56, 57 and the endless belts BLT, BLT do not come into contact with each other due to vibration of the device. This makes it possible to suppress wear in the pressing parts 56, 57 and the endless belts BLT, BLT caused by contact between the pressing parts 56, 57 and the endless belts BLT, BLT.
In a veneer dewatering apparatus, a clutch 30 is arranged on a power transmission path between upper and lower rolls 4, 6 and rotating shafts 20. When a veneer portion without a part such as a knot having extremely high compressive strength compared to the other parts passes between the upper roll 4 and the lower roll 6, or when a veneer passes between the upper roll 4 and the lower roll 6 with no foreign matter such as dust interposed between the upper and lower rolls 4, 6 and the veneer, the clutch 30 connects the upper and lower rolls 4, 6 to the rotating shafts 20. When a veneer passes between the upper and lower rolls 4, 6 with a knot and other foreign matters intervening, the connection between the upper and lower rolls 4, 6 and the rotating shafts 20 by the clutch 30 is released.
F26B 5/14 - Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringingDrying solid materials or objects by processes not involving the application of heat by brushingDrying solid materials or objects by processes not involving the application of heat by wiping
B30B 9/20 - Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using rotary pressing members, other than worms or screws, e.g. rollers, rings, discs
5.
VENEER DEWATERING APPARATUS AND METHOD OF DEWATERING VENEER
In a veneer dewatering apparatus, a clutch 30 is arranged on a power transmission path between upper and lower rolls 4, 6 and rotating shafts 20. When a veneer portion without a part such as a knot having extremely high compressive strength compared to the other parts passes between the upper roll 4 and the lower roll 6, or when a veneer passes between the upper roll 4 and the lower roll 6 with no foreign matter such as dust interposed between the upper and lower rolls 4, 6 and the veneer, the clutch 30 connects the upper and lower rolls 4, 6 to the rotating shafts 20. When a veneer passes between the upper and lower rolls 4, 6 with a knot and other foreign matters intervening, the connection between the upper and lower rolls 4, 6 and the rotating shafts 20 by the clutch 30 is released.
F26B 5/14 - Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringingDrying solid materials or objects by processes not involving the application of heat by brushingDrying solid materials or objects by processes not involving the application of heat by wiping
B27D 1/00 - Joining wood veneer with any materialForming articles therebyPreparatory processing of surfaces to be joined, e.g. scoring
B27D 5/00 - Other working of veneer or plywood specially adapted to veneer or plywood
Scarf faces 92a, 92b are machined at a heeling angle θ2 on a veneer 90 by adjusting the heeling angle θ2 for a desired camber h using the following Equation (1):
Scarf faces 92a, 92b are machined at a heeling angle θ2 on a veneer 90 by adjusting the heeling angle θ2 for a desired camber h using the following Equation (1):
h
=
R
2
·
sin
θ
2
-
sin
2
θ
2
·
R
2
-
t
2
(
1
+
i
2
)
4
(
1
)
Scarf faces 92a, 92b are machined at a heeling angle θ2 on a veneer 90 by adjusting the heeling angle θ2 for a desired camber h using the following Equation (1):
h
=
R
2
·
sin
θ
2
-
sin
2
θ
2
·
R
2
-
t
2
(
1
+
i
2
)
4
(
1
)
With the configuration, double cutting of the veneer 90 by a circular saw 20 can be effectively prevented. Since the camber h is set desirably, the risk can be reduced that the scarf faces 92a, 92b only partially join each other, and a space can be secured to retain an adhesive Ad between arc concavities 91, 91. Thus, when the veneers 90 are joined together at the scarf faces 92a, 92b, the adhesive Ad is unlikely to seep out onto the surfaces of the veneers 90. As a result, the scarf faces 92a, 92b can be properly joined together.
When the absolute value (|Tt−Tc|) of the difference between the turning time Tt of a log PW and the transport time Tc of the log PW is longer than a reference measurement time Ts, the turning-axis center line measurement time Tm is set to the absolute value (|Tt−Tc|) (Step S120), the rotation speed W of centering spindles 24a and 24b is set to a speed (Ws×Ts/Tm) lower than a reference rotation speed Ws, and also the measurement rotation angle α is set to an angle (αs×Ts/Tm) smaller than a reference measurement rotation angle as (Step S122). When the absolute value (|Tt−Tc|) is equal to or less than the reference measurement time Ts, the turning-axis center line measurement time Tm is set to the reference measurement time Ts (Step S116), the rotation speed W of the centering spindles 24a and 24b is set to the reference rotation speed Ws, and also the measurement rotation angle α is set to the reference measurement rotation angle αs (Step S118).
[Problem] To provide a scarfing device contributing to both an improvement in productivity and achievement of a fine scarf surface. [Solution] Supporting tables 8, 9 capable of supporting both ends 90a, 90b of a veneer 90 are arranged when both ends 90a, 90b are processed using disc saws 40a, 41a to have a scarf surface. The supporting tables 8, 9 are provided with pressing parts 56, 57 capable of pressing both ends 90a, 90b, disc saw contacting parts 54, 55 receiving the disc saws 40a, 41a, and auxiliary conveyors 60, 62 capable of transporting both ends 90a, 90b in a transporting direction TD. The pressing parts 56, 57 are capable of pressing both ends 90a, 90b onto at least the auxiliary conveyors 60, 62. The auxiliary conveyors 60, 62 are arranged adjacent to the disc saw contacting parts 54, 55. Since both ends 90a, 90b are transportable in the transporting direction TD, both ends 90a, 90b can be pressed by the pressing parts 56, 57 to reduce a frictional force acting on both ends 90a, 90b in the direction opposite to the transporting direction TD.
[Problem] To provide a scarfing device contributing to both an improvement in productivity and achievement of a fine scarf surface. [Solution] Supporting tables 8, 9 capable of supporting both ends 90a, 90b of a veneer 90 are arranged when both ends 90a, 90b are processed using disc saws 40a, 41a to have a scarf surface. The supporting tables 8, 9 are provided with pressing parts 56, 57 capable of pressing both ends 90a, 90b, disc saw contacting parts 54, 55 receiving the disc saws 40a, 41a, and auxiliary conveyors 60, 62 capable of transporting both ends 90a, 90b in a transporting direction TD. The pressing parts 56, 57 are capable of pressing both ends 90a, 90b onto at least the auxiliary conveyors 60, 62. The auxiliary conveyors 60, 62 are arranged adjacent to the disc saw contacting parts 54, 55. Since both ends 90a, 90b are transportable in the transporting direction TD, both ends 90a, 90b can be pressed by the pressing parts 56, 57 to reduce a frictional force acting on both ends 90a, 90b in the direction opposite to the transporting direction TD.
Cleaning water CW is supplied to the outer surface of a draining roll 10 from a pipe 70 arranged above the draining roll 10 that is in pressure contact with a contact roll 8 via a polishing belt PB. Accordingly, the cleaning water CW adheres evenly to the outer surface of the draining roll 10 in the longitudinal direction along with the rotation of the draining roll 10. Then, the cleaning water CW sufficiently adhering to the outer peripheral surface of the draining roll 10 is carried to a contact portion 90 between the draining roll 10 and the polishing belt PB, and cleans the abrasive surface of the polishing belt PB. As a result, it is possible to well reduce the occurrence of uneven cleaning on the abrasive surface, and to further improve the polishing effects of a polishing apparatus 1.
[Problem] To realize a scarf surface which contributes to favorable bonding between scarf surfaces. [Solution] Using the following equation (1), a healing angle ?2 is adjusted to reach a desired camber h, and scarf surfaces 92a, 92b are machined on a veneer 90 with this healing angle ?2. This makes it possible to favorably prevent a second shaving of the veneer 90 by a circular saw 20. Note that the camber h is at the desired height, and thus it is possible to inhibit the scarf surfaces 92a, 92b from partially bonding with each other, while ensuring a space with which an adhesive Ad can be favorably held between circular arc concave surfaces 91, 91. This makes it possible to favorably inhibit the adhesive Ad from oozing out to the surface of the veneer 90 on the occasion of bonding the veneers 90 with the scarf surfaces 92a, 92b. As a result, it is possible to suitably bond the scarf surfaces 92a, 92b.
222. This makes it possible to favorably prevent a second shaving of the veneer 90 by a circular saw 20. Note that the camber h is at the desired height, and thus it is possible to inhibit the scarf surfaces 92a, 92b from partially bonding with each other, while ensuring a space with which an adhesive Ad can be favorably held between circular arc concave surfaces 91, 91. This makes it possible to favorably inhibit the adhesive Ad from oozing out to the surface of the veneer 90 on the occasion of bonding the veneers 90 with the scarf surfaces 92a, 92b. As a result, it is possible to suitably bond the scarf surfaces 92a, 92b.
Provided is a veneer sorting control device including: a sorting condition setting unit 11 that sets sorting conditions for each of a plurality of kinds of defects so as to sort a veneer into a plurality of quality ranks; a defect detection unit 13 that detects the plurality of kinds of defects with respect to each of a plurality of pieces of veneer image data acquired from an image storage unit 100; a quality rank sorting unit 14 that sorts a plurality of the veneers into a plurality of quality ranks in correspondence with the sorting conditions which are set and defect detection states; a first totalization unit 15 that totalizes the number or a number ratio of the veneers in the plurality of quality ranks which are sorted; and a display control unit 17 that displays the totalization result on a screen. The number of the veneers sorted into the plurality of quality ranks can be confirmed by a simulation using the veneer image data stored in the image storage unit 100.
A nosebar is supported by supports arranged along the longitudinal direction, and the supports are assembled to fixtures to swing independently of each other in a direction away from a log according to the reaction force of the pressing force acting on the supports. Thus, when a knife peels a knot part of the log or a fragment of the log enters a cutting edge, the portion of the nosebar pressing the knot part or corresponding to the location where the fragment enters the cutting edge is greatly deformed, while the deformation of the nosebar in the other portions is kept small. A corner of the nosebar is prevented from contacting the peeled portion of the raw wood and generating a gap when the nosebar is bent and deformed.
A light 2 for reflected light that emits visible light for reflected light onto a front side of a veneer 6, a light 32 for invisible light that emits near-infrared light for transmitted light onto a back side of the veneer 6, and an image processing device 1 that detects defects of the veneer 6 by analyzing a captured image generated by a line sensor camera 4 are provided. Defects of the veneer 6 are discriminated on the basis of a set of shading and shapes in an infrared-transmitted-light image based on the transmitted light, and colors in a visible-light image based on the reflected light. Consequently, even if a defect has a small color difference from a normal part in the visible-light image, difference of shading between the defective part and the normal part appears in the infrared-transmitted-light image, and a defect that is difficult to detect by seeing only a color difference in a visible-light image can be relatively easily detected.
G01N 21/359 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
G01N 21/95 - Investigating the presence of flaws, defects or contamination characterised by the material or shape of the object to be examined
A log feeding apparatus for feeding a log to first and second cutting spindles is provided, in which a log is fed to a second receiving position when centering spindles have reached a second delivery position that is away from the second receiving position downstream in the direction of log transport by a distance equal to or greater than an assumed maximum diameter of the log. That is, a new log is transported to the second receiving position by placing sections when the log held between the centering spindles reaches a position that will avoid contact with the new log. As a result, the time can be reduced for transporting the log to the cutting spindles.
[Problem] To further improve the yield of veneer without causing a reduction in work efficiency.[Solution] When an absolute value (|Tt-Tc|) of a difference between a turning time Tt of raw wood PW and a conveyance time Tc of the raw wood PW is longer than a reference measurement time Ts, a turning axis central line measurement time Tm is set at the absolute value (|Tt-Tc|) (step S120), a rotation speed W of centering spindles 24a and 24b is set at a speed (Ws × Ts/Tm) lower than a reference rotation speed Ws, and a measurement rotation angle ? is set at an angle (?s × Ts/Tm) smaller than a reference measurement rotation angle ?s (step S122). On the other hand, when the absolute value (|Tt-Tc|) is less than or equal to the reference measurement time Ts, the turning axis central line measurement time Tm is set at the reference measurement time Ts (step S116), the rotation speed W of the centering spindles 24a and 24b is set at the reference rotation speed Ws, and the measurement rotation angle ? is set at the reference measurement rotation angle ?s (step S118).
[Problem] To further improve the yield of veneer without causing a reduction in work efficiency. [Solution] When an absolute value (|Tt-Tc|) of a difference between a turning time Tt of raw wood PW and a conveyance time Tc of the raw wood PW is longer than a reference measurement time Ts, a turning axis central line measurement time Tm is set at the absolute value (|Tt-Tc|) (step S120), a rotation speed W of centering spindles 24a and 24b is set at a speed (Ws × Ts/Tm) lower than a reference rotation speed Ws, and a measurement rotation angle α is set at an angle (θs × Ts/Tm) smaller than a reference measurement rotation angle αs (step S122). On the other hand, when the absolute value (|Tt-Tc|) is less than or equal to the reference measurement time Ts, the turning axis central line measurement time Tm is set at the reference measurement time Ts (step S116), the rotation speed W of the centering spindles 24a and 24b is set at the reference rotation speed Ws, and the measurement rotation angle α is set at the reference measurement rotation angle αs (step S118).
A light 2 for reflected light that emits visible light for reflected light onto a front side of a veneer 6, a light 32 for invisible light that emits near-infrared light for transmitted light onto a back side of the veneer 6, and an image processing device 1 that detects defects of the veneer 6 by analyzing a captured image generated by a line sensor camera 4 are provided. Defects of the veneer 6 are discriminated on the basis of a set of shading and shapes in an infrared-transmitted-light image based on the transmitted light, and colors in a visible-light image based on the reflected light. Consequently, even if a defect has a small color difference from a normal part in the visible-light image, difference of shading between the defective part and the normal part appears in the infrared- transmitted-light image, and a defect that is difficult to detect by seeing only a color difference in a visible-light image can be relatively easily detected.
When a veneer conveyed out by a discharging conveyor is a product veneer, a sorting apparatus is rotationally driven to pierce the product veneer with needle-like bodies by a guide member and a push-up member (a rolling bearing). When the veneer conveyed out by the discharging conveyor is a trash veneer, the sorting apparatus is rotationally driven so that the trash veneer is not pierced by the needle-like body. With this configuration, the progress of the abrasion of the needle-like bodies can be delayed as compared with the configuration in which the product veneer and the trash veneer are both pierced by the needle-like body. As a result, the time to replace the needle-like bodies can be extended, whereby the running cost can be reduced.
A veneer cutting and sorting apparatus is disclosed. The apparatus includes a revolvable knife blade having a cutting edge and a revolvable knife edge receiver having a cutting edge receiving surface. The knife blade cuts a veneer sheet as peeled from a peeler block by a veneer lathe at a previously detected boundary between defective veneer portion and product veneer sheet on the cutting edge receiving surface then revolving at the same peripheral speed as the cutting edge of the knife blade. Cut-off defective portion is allowed to drop off by its own weight.
B26D 1/40 - Cutting through work characterised by the nature or movement of the cutting memberApparatus or machines thereforCutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member
B27L 5/08 - Severing sheets or segments from veneer stripsShearing devices thereforMaking veneer blanks, e.g. trimming to size
B65G 47/04 - Devices for feeding articles or materials to conveyors for feeding articles
B65G 47/48 - Devices for discharging articles or materials from conveyors with distribution, e.g. automatically, to desired points according to bodily destination marks on either articles or load-carriers
B65G 47/56 - Devices for transferring articles or materials between conveyors, i.e. discharging or feeding devices to or from inclined or vertical conveyor sections
B27L 5/02 - Cutting strips from a rotating trunk or pieceVeneer lathes
ABSTRACT OF THE DISCLOSURE A veneer cutting and sorting apparatus is disclosed. The apparatus includes a revolvable knife blade having a cutting edge and a revolvable knife edge receiver having a cutting edge receiving surface. The knife blade cuts a veneer sheet as peeled from a peeler block by a veneer lathe at a previously detected boundary between defective veneer portion and product veneer sheet on the cutting edge receiving surface then revolving at the same peripheral speed as the cutting edge of the knife blade. Cut-off defective portion is allowed to drop off by its own weight. * * * * * - 32 - CA 3077527 2020-03-31
[Problem] To further improve polishing effects while having a simple configuration. [Solution] Cleaning water CW is supplied to the outer peripheral surface of a draining roll 10 from a pipe 70 disposed directly above the draining roll 10, the draining roll being brought into pressure contact with a contact roll 8 with a polishing belt PB therebetween. The foregoing, along with the rotation of the draining roll 10, causes the cleaning water CW to attach to the outer peripheral surface of the draining roll 10 in a planar shape without unevenness across the longitudinal direction of the draining roll. The cleaning water CW sufficiently attached to the outer peripheral surface of the draining roll 10 is carried by a contact part 90 between the draining roll 10 and the polishing belt PB and cleans the abrasive grain surface of the polishing belt PB. As a result, it is possible to favorably suppress the occurrence of cleaning unevenness on the abrasive grain surface, and to further improve the polishing effects of a polishing device 1.
Polishing apparatus and method for polishing a processed material with an endless abrasive belt, and a cleaning liquid supply device for supplying a cleaning liquid to the polishing apparatus. The polishing apparatus includes a frame body, a first roll, a second roll, and a cleaning liquid supply pipe. The first roll is rotatably supported by the frame body so as to be in pressure-contact with the surface opposite to the abrasive surface. The second roll is disposed to be parallel to the first roll and face the abrasive surface, and is rotatably supported by the frame body so as to be in pressure-contact with the first roll via the abrasive belt. The cleaning liquid supply pipe has at least one discharge port for discharging a cleaning liquid and is supported by the frame body such that the discharge port faces the outer surface of the second roll.
The present invention is provided with: a sorting condition setting unit 11 which sets a sorting condition for each of a plurality of types of defects in order to sort veneers into a plurality of quality ranks; a defect detection unit 13 which detects the plurality of types of defects from each of a plurality of pieces of veneer image data acquired from an image storage unit 100; a quality rank sorting unit 14 which sorts a plurality of the veneers into the plurality of respective quality ranks according to the set sorting condition and the detected state of the defect; a first totalization unit 15 which totalizes a quantity or a quantity ratio of the veneers sorted into each of the plurality of quality ranks; and a display control unit 17 which makes the totalization result be displayed on a screen, wherein the quantity ratios of the veneers sorted into the plurality of quality ranks are made to be checked by a simulation using the veneer image data stored in the image storage unit 100.
B27D 1/00 - Joining wood veneer with any materialForming articles therebyPreparatory processing of surfaces to be joined, e.g. scoring
B27D 5/00 - Other working of veneer or plywood specially adapted to veneer or plywood
G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
26.
VENEER SORTING CONTROL DEVICE, VENEER SORTING CONTROL METHOD, AND VENEER SORTING CONTROL PROGRAM
The present invention is provided with: a sorting condition setting unit 11 which sets a sorting condition for each of a plurality of types of defects in order to sort veneers into a plurality of quality ranks; a defect detection unit 13 which detects the plurality of types of defects from each of a plurality of pieces of veneer image data acquired from an image storage unit 100; a quality rank sorting unit 14 which sorts a plurality of the veneers into the plurality of respective quality ranks according to the set sorting condition and the detected state of the defect; a first totalization unit 15 which totalizes a quantity or a quantity ratio of the veneers sorted into each of the plurality of quality ranks; and a display control unit 17 which makes the totalization result be displayed on a screen, wherein the quantity ratios of the veneers sorted into the plurality of quality ranks are made to be checked by a simulation using the veneer image data stored in the image storage unit 100.
B27D 1/00 - Joining wood veneer with any materialForming articles therebyPreparatory processing of surfaces to be joined, e.g. scoring
G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
27.
VENEER DEHYDRATION METHOD AND VENEER DEHYDRATION SYSTEM
A layered-up veneer board is formed by layering veneers up to a predetermined height such that the fiber directions of the respective veneers are alternately perpendicular to one another, and the layered-up veneer board is compressed by a compression device, to remove moisture contained in the veneers. Wood is a material in which the tensile strength in the fiber direction of the wood is higher than the tensile strength in the direction perpendicular to the fiber direction. With this layering scheme, even when stress is applied to the veneers and causes elongational deformation of these veneers as a result of compressing the layered-up veneer boards in the layering direction, elongational deformation of the veneers in the directions perpendicular to the fiber directions thereof can be reduced.
B27K 5/00 - Staining or dyeing woodBleaching woodTreating of wood not provided for in groups or
B30B 9/04 - Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams
F26B 5/14 - Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringingDrying solid materials or objects by processes not involving the application of heat by brushingDrying solid materials or objects by processes not involving the application of heat by wiping
28.
A KNIFE CARRIAGE, A ROTARY VENEER LATHE HAVING THE SAME, AND A VENEER SLICER HAVING THE SAME
A nosebar 20 is supported by supports 34 arranged along the longitudinal direction, and the supports 34 are assembled to fixtures 32 to swing independently of each other in a direction away from a log PW according to the reaction force of the pressing force acting on the supports 34. Thus, when a knife Kn peels a knot part Sp of the log PW or a fragment of the log PW enters a cutting edge, the portion of the nosebar 20 pressing the knot part Sp or corresponding to the location where the fragment enters the cutting edge is greatly deformed, while the deformation (the amount of movement) of the nosebar 20 in the other portions is kept small. A corner of the nosebar 20 is prevented from contacting the peeled portion 90 of the raw wood PW and generating a gap when the nosebar 20 is bent and deformed.
A nosebar 20 is supported by supports 34 arranged along the longitudinal direction, and the supports 34 are assembled to fixtures 32 to swing independently of each other in a direction away from a log PW according to the reaction force of the pressing force acting on the supports 34. Thus, when a knife Kn peels a knot part Sp of the log PW or a fragment of the log PW enters a cutting edge, the portion of the nosebar 20 pressing the knot part Sp or corresponding to the location where the fragment enters the cutting edge is greatly deformed, while the deformation (the amount of movement) of the nosebar 20 in the other portions is kept small. A corner of the nosebar 20 is prevented from contacting the peeled portion 90 of the raw wood PW and generating a gap when the nosebar 20 is bent and deformed.
A log feeding apparatus for feeding a log to first and second cutting spindles is provided, in which a log PW is fed to a second receiving position RP2 when centering spindles 24a, 24b have reached second delivery position DP2 that is away from the second delivery position DP2 downward in the direction of log transport by a distance equal to or greater than an assumed maximum diameter of the log. That is, a new log PW is transported to the second receiving position RP2 when the log transported by placing sections 42, 42 reaches a position not to contact the log PW held between the centering spindles 24a, 24b. As a result, the time can be reduced for transporting the log PW to the cutting spindles 72a and 72b.
A log feeding apparatus for feeding a log to first and second cutting spindles is provided, in which a log PW is fed to a second receiving position RP2 when centering spindles 24a, 24b have reached second delivery position DP2 that is away from the second delivery position DP2 downward in the direction of log transport by a distance equal to or greater than an assumed maximum diameter of the log. That is, a new log PW is transported to the second receiving position RP2 when the log transported by placing sections 42, 42 reaches a position not to contact the log PW held between the centering spindles 24a, 24b. As a result, the time can be reduced for transporting the log PW to the cutting spindles 72a and 72b.
An apparatus for moving veneer includes a leaf spring having at lower tip end thereof sharpened edges and configured to move a veneer sheet toward its preceding stationary veneer sheet. Further lowering the leaf spring with the tip end already stuck in the veneer sheet causes the leaf spring to be resiliently deformed, which creates a force due to restoring force of the leaf spring that acts on the veneer sheet to move toward the preceding veneer sheet thereby to reduce or eliminate a gap between the two veneer sheets. Additional leaf spring movable with the above leaf spring and configured to hold the preceding veneer sheet during the movement may be provided.
B65H 29/12 - Delivering or advancing articles from machinesAdvancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands
B65H 29/14 - Delivering or advancing articles from machinesAdvancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands and introducing into a pile
B65H 29/22 - Delivering or advancing articles from machinesAdvancing articles to or into piles by contact with rotating friction members, e.g. rollers, brushes, or cylinders and introducing into a pile
B65H 31/02 - Pile receivers with stationary end support against which pile accumulates
B65H 9/10 - Pusher or like movable registersPusher or gripper devices which move articles into registered position
An apparatus for moving veneer includes a leaf spring having at lower tip end thereof sharpened edges and configured to move a veneer sheet toward its preceding stationary veneer sheet. Further lowering the leaf spring with the tip end already stuck in the veneer sheet causes the leaf spring to be resiliently deformed, which creates a force due to restoring force of the leaf spring that acts on the veneer sheet to move toward the preceding veneer sheet thereby to reduce or eliminate a gap between the two veneer sheets. Additional leaf spring movable with the above leaf spring and configured to hold the preceding veneer sheet during the movement may be provided.
B65H 9/08 - Holding devices, e.g. finger, needle, suction, for retaining articles in registered position
B27D 1/00 - Joining wood veneer with any materialForming articles therebyPreparatory processing of surfaces to be joined, e.g. scoring
B27D 5/00 - Other working of veneer or plywood specially adapted to veneer or plywood
B65G 47/28 - Devices influencing the relative position or the attitude of articles during transit by conveyors arranging the articles, e.g. varying spacing between individual articles during transit by a single conveyor
B65G 47/82 - Rotary or reciprocating members for direct action on articles or materials, e.g. pushers, rakes, shovels
B65H 9/06 - Movable stops or gauges, e.g. rising and falling front stops
B65H 37/04 - Article or web delivery apparatus incorporating devices for performing specified auxiliary operations for securing together articles or webs, e.g. by adhesive, stitching, or stapling
B65H 39/10 - Associating articles from a single source, e.g. to form a writing pad
34.
VENEER SHEET CONVEYING APPARATUS AND METHOD FOR CONTROLLING THE SAME
When a veneer conveyed out by a discharging conveyor is a product veneer, a sorting device is rotationally driven to pierce the product veneer with a needle-like bodies by a guide member 24 and a push-up member 26 (a rolling bearing). When the veneer conveyed out by the discharging conveyor is a trash veneer, the sorting device is rotationally driven so that the trash veneer is not pierced by the needle-like bodies. With this configuration, the progress of the abrasion of the needle-like bodies can be delayed as compared with the configuration in which the product veneer and the trash veneer are both pierced by the needle-like bodies. As a result, the time to replace the needle-like bodies can be extended, whereby the running cost can be reduced.
[Problem] To contribute to a reduction in running costs when conveying veneers. [Solution] When the veneer 10 being discharged by a discharge conveyor 7 is a product veneer 12, a sorting device 20 is rotationally driven such that a guiding member 24 and a lifting member 26 (rolling bearing 26a) cause the product veneer 12 to be pierced by needle-shaped bodies 8a'. When the veneer 10 being discharged by the discharge conveyor 7 is a scrap veneer 14, the sorting device 20 is rotationally driven such that the scrap veneer 14 is not pierced by the needle-shaped bodies 8a'. As a result, it is possible to retard the wear of the needle-shaped bodies 8a' in comparison to a configuration in which both product veneers 12 and scrap veneers 14 are pierced by the needle-shaped bodies 8a' and conveyed by a piercing-holding conveyor 8. It is thereby possible to prolong the period before the needle-shaped bodies 8a' are replaced, making it possible to reduce running costs.
A layered-up veneer board is formed by layering veneers up to a predetermined height such that the fiber directions of the respective veneers are alternately perpendicular to one another, and the layered-up veneer board is compressed by a compression device, to remove moisture contained in the veneers. Wood is a material in which the tensile strength in the fiber direction of the wood is higher than the tensile strength in the direction perpendicular to the fiber direction. With this layering scheme, even when stress is applied to the veneers and causes elongational deformation of these veneers as a result of compressing the layered-up veneer boards in the layering direction, elongational deformation of the veneers in the directions perpendicular to the fiber directions thereof can be reduced.
B27D 1/04 - Joining wood veneer with any materialForming articles therebyPreparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefromPlywood sheets
F26B 5/14 - Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringingDrying solid materials or objects by processes not involving the application of heat by brushingDrying solid materials or objects by processes not involving the application of heat by wiping
B27D 3/02 - Veneer pressesPress platesPlywood presses with a plurality of press plates, i.e. multi-platen hot presses
A knife assembly for use in a veneer cutting machine such as a rotary veneer lathe and a veneer slicer includes a knife blade, a knife blade holder and a knife adjusting bolt with a lock nut. The knife blade holder includes a holder block having formed therethrough a threaded hole through which the knife adjusting bolt is adjustably inserted. The holder block has a first support surface that is in supporting contact with a part of one surface of the knife blade on the side thereof where a bevel face of the knife blade is formed and a second support surface that is in supporting contact with a part of a base end surface located opposite from and extending parallel to a cutting edge of the knife blade.
B26D 7/26 - Means for mounting or adjusting the cutting memberMeans for adjusting the stroke of the cutting member
B27L 5/02 - Cutting strips from a rotating trunk or pieceVeneer lathes
B26D 3/28 - Splitting layers from workMutually separating layers by cutting
B26D 1/02 - Cutting through work characterised by the nature or movement of the cutting memberApparatus or machines thereforCutting members therefor involving a cutting member which does not travel with the work having a stationary cutting member
A knife assembly for use in a veneer cutting machine such as a rotary veneer lathe and a veneer slicer includes a knife blade, a knife blade holder and a knife adjusting bolt with a lock nut. The knife blade holder includes a holder block having formed therethrough a threaded hole through which the knife adjusting bolt is adjustably inserted. The holder block has a first support surface that is in supporting contact with a part of one surface of the knife blade on the side thereof where a bevel face of the knife blade is formed and a second support surface that is in supporting contact with a part of a base end surface located opposite from and extending parallel to a cutting edge of the knife blade.
Method and apparatus for dehydration of veneer sheet having therein a knot are disclosed. Veneer dehydration apparatus includes a first stationary single dehydrating roller and a plurality of second movable sectional dehydrating rollers, which rollers are disposed one above the other so that a nip through which a veneer sheet for dehydration is moved is formed between the first and second rollers. A stop device determines the initial position of each second roller relative to the first roller where a predetermined spaced distance is formed between the first and the second rollers. An urging device yieldably urges each second roller to the initial position. The second roller is movable away from the initial position against the urging force of the urging device independently of the other second rollers by a knot present in the veneer sheet and just moving through the nip between the second roller and the first roller.
B30B 3/04 - Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs co-operating with one another, e.g. with co-operating cones
F26B 13/28 - Arrangements of devices using drying processes not involving heating for applying pressureArrangements of devices using drying processes not involving heating for brushingArrangements of devices using drying processes not involving heating for wiping
F26B 5/14 - Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringingDrying solid materials or objects by processes not involving the application of heat by brushingDrying solid materials or objects by processes not involving the application of heat by wiping
Method and apparatus for dehydration of veneer sheet having therein a knot are disclosed. Veneer dehydration apparatus includes a first stationary single dehydrating roller and a plurality of second movable sectional dehydrating rollers, which rollers are disposed one above the other so that a nip through which a veneer sheet for dehydration is moved is formed between the first and second rollers. A stop device determines the initial position of each second roller relative to the first roller where a predetermined spaced distance is formed between the first and the second rollers. An urging device yieldably urges each second roller to the initial position. The second roller is movable away from the initial position against the urging force of the urging device independently of the other second rollers by a knot present in the veneer sheet and just moving through the nip between the second roller and the first roller.
F26B 3/18 - Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
F26B 13/04 - Machines or apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a straight line using rollers
A method of cutting a wood block and a veneer lathe are disclosed. Two groups of first plural contact members and second plural contact members disposed around the wood block for supporting the wood block from the periphery thereof and each having a contact portion contactable with periphery of the wood block. The first and the second contact members are spaced away from each other along the spin axis of the wood block so as to form a space between any two adjacent contact members, respectively, and arranged in such a way that a part of the contact member of one group is insertable into the space between any two adjacent contact members of the other group when the wood block is cut to a predetermined reduced diameter so that the wood block is continued to be supported further.
A method for forming a bevel cut at an end of a wood member is disclosed. A wood member is placed on a support table and a plurality of cutters mounted on and spaced along a shaft extending in parallel to the end of the wood member on the table is moved relative to the table in a direction inclined with respect to the wood member thereby to make a first cutting to form a plurality of bevel cuts. The support table is shifted in the direction parallel to the end of the wood member and a second cutting is made by the relative movement between the cutters and the table. During the first and second cutting, the wood member is pressed against the support table by a pressing member at a position adjacent to the end of the wood member and between any two adjacent cutters.
A method of cutting a wood block and a veneer lathe are disclosed. Two groups of first plural contact members and second plural contact members disposed around the wood block for supporting the wood block from the periphery thereof and each having a contact portion contactable with periphery of the wood block. The first and the second contact members are spaced away from each other along the spin axis of the wood block so as to form a space between any two adjacent contact members, respectively, and arranged in such a way that a part of the contact member of one group is insertable into the space between any two adjacent contact members of the other group when the wood block is cut to a predetermined reduced diameter so that the wood block is continued to be supported further.
A method of cutting a wood block and a veneer lathe are disclosed. Two groups of first plural contact members and second plural contact members disposed around the wood block for supporting the wood block from the periphery thereof and each having a contact portion contactable with periphery of the wood block. The first and the second contact members are spaced away from each other along the spin axis of the wood block so as to form a space between any two adjacent contact members, respectively, and arranged in such a way that a part of the contact member of one group is insertable into the space between any two adjacent contact members of the other group when the wood block is cut to a predetermined reduced diameter so that the wood block is continued to be supported further.
An apparatus and a method for determining the annual ring center of a wood block are disclosed. A plurality of lines of path is figured out and generated. Each line of path is composed of a plurality of lines each extending normal to a line that is tangential to an annual ring in an image of the wood block end. The normal line may be figured out, for example, by calculating the variance of values of pixels lying on each of a plurality of straight lines of a filter and the sum of the variances for the plurality of straight lines at a plurality of different angular positions of the filter. The annual ring center in the image of the wood block end is determined through calculation based on the points of intersection of the generated lines of path.
An apparatus and a method for determining the annual ring center of a wood block are disclosed. A plurality of lines of path is figured out and generated. Each line of path is composed of a plurality of lines each extending normal to a line that is tangential to an annual ring in an image of the wood block end. The normal line may be figured out, for example, by calculating the variance of values of pixels lying on each of a plurality of straight lines of a filter and the sum of the variances for the plurality of straight lines at a plurality of different angular positions of the filter. The annual ring center in the image of the wood block end is determined through calculation based on the points of intersection of the generated lines of path.
An imaging means captures a color image of lumber. An image processing means obtains the color distribution of the color image captured by the imaging means, compares the obtained color distribution with a predetermined color distribution of normal lumber, judges the obtained color distribution as an abnormal one when it is deviated from the color distribution of normal lumber by a predetermined value or more, and detects a defect of the lumber having the abnormal color distribution deviated by a value larger than the predetermined value in an area on the surface of the lumber captured by the imaging means.
H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
G06F 15/16 - Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs
50.
APPARATUS AND METHOD FOR MEASURING THREE-DIMENSIONAL SHAPE OF A WOOD BLOCK
An apparatus and a method for measuring three-dimensional shape of a wood block are disclosed. A planar light beam is projected by a light emitting device against a wood block -rotatably supported on its tentative spin axis in such a way that two continuous lines extending parallel to the tentative spin axis for the entire block length are illuminated on the outer peripheral surface of the block. The block with the illuminated lines is photographed at a plurality of its angular positions by a imaging device. Based on data of the photographed line images, distances between the tentative spin axis and each of the illuminated lines on the outer peripheral surface of the block are computed at a plurality of cross- sections of the block along the tentative spin axis. Distances from the tentative spin axis to the outer peripheral surface of the block, including shapes of various irregularities on the surface of the block, are measured.
G01B 11/245 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures using a plurality of fixed, simultaneously operating transducers
51.
Apparatus and method for measuring three-dimensional shape of wood block
An apparatus and a method for measuring three-dimensional shape of a wood block are disclosed. A planar light beam is projected by a light emitting device against a wood block rotatably supported on its tentative spin axis in such a way that two continuous lines extending parallel to the tentative spin axis for the entire block length are illuminated on the outer peripheral surface of the block. The block with the illuminated lines is photographed at a plurality of its angular positions by a imaging device. Based on data of the photographed line images, distances between the tentative spin axis and each of the illuminated lines on the outer peripheral surface of the block are computed at a plurality of cross-sections of the block along the tentative spin axis. Distances from the tentative spin axis to the outer peripheral surface of the block, including shapes of various irregularities on the surface of the block, are measured.
An apparatus and a method for successively conveying a series of sheets are disclosed. The apparatus has a first conveyer for conveying a sheet in a sheet conveying direction at a first speed and a second conveyer disposed spaced vertically away from the first conveyer for conveying the sheet in the same direction at a second speed. The second conveyer has a region overlapping with the first conveyer at least for a distance corresponding to a dimension of the sheet, e.g. the width of veneer sheet, as measured in the sheet conveying direction. A suction mechanism is disposed in said overlapping region for transferring by suction the sheet in the entirety of its dimension from the first conveyer to the second conveyer and holding by suction the sheet against the second conveyer. The sheet is further moved by the second conveyer, e.g. to a sheet stacking station.
An imaging means (8) captures a color image of lumber (9). An image processing means (1) obtains the color distribution of the color image captured by the imaging means (8), compares the obtained color distribution with a predetermined color distribution of normal lumber, judges the obtained color distribution as an abnormal one when it is deviated from the color distribution of normal lumber by a predetermined value or more, and detects a defect of the lumber having the abnormal color distribution deviated by a value larger than the predetermined value in an area on the surface of the lumber captured by the imaging means.
G01N 21/892 - Investigating the presence of flaws, defects or contamination in moving material, e.g. paper, textiles characterised by the flaw, defect or object feature examined
G01J 3/46 - Measurement of colourColour measuring devices, e.g. colorimeters
An imaging means (8) captures a color image of lumber (9). An image processing means (1) obtains the color distribution of the color image captured by the imaging means (8), compares the obtained color distribution with a predetermined color distribution of normal lumber, judges the obtained color distribution as an abnormal one when it is deviated from the color distribution of normal lumber by a predetermined value or more, and detects a defect of the lumber having the abnormal color distribution deviated by a value larger than the predetermined value in an area on the surface of the lumber captured by the imaging means.
G01N 21/892 - Investigating the presence of flaws, defects or contamination in moving material, e.g. paper, textiles characterised by the flaw, defect or object feature examined
G01J 3/46 - Measurement of colourColour measuring devices, e.g. colorimeters
The present invention discloses a method for laying a sheet over the lower surface of a base material disposed in a generally horizontal position. According to the method, the base material is supported at the lower surface thereof by a first support means, and the sheet is placed immediately below and in facing relation to the lower surface of the base material and then supported at the lower surface thereof by a second support means. The sheet and the base material are made to be in contact with each other over partial surfaces thereof. Subsequently, the first support means is moved away from the base material and the sheet and the base material are placed together on a rigid horizontal surface so that the sheet is laid substantially over the entire lower surface of the base material.
A method for locating an optimum peeling axis of a log and a maximum radius point on peripheral surface of the log with respect to the located optimum peeling axis and an apparatus for practicing the method are disclosed. A plurality of swingable members are provided, each member having a contact surface which is swingable in contact with the peripheral surface of the log thereby to follows the peripheral profile of the log while it is being rotated about its preliminary axis. Angular positions of the contact surfaces are measured with respect to a reference position at a number of angularly spaced positions of the log. On the basis of the measured angular positions of the contact surfaces, radial distances of the log from a plurality of predetermined locations on the optimum peeling axis to selected contact surfaces are computed for comparison such radial distances. The distance having the greatest value is regarded as the maximum radius point of the log.
A method of locating an optimum peeling axis of a log and a maximum radius point on peripheral surface of the log with respect to the located optimum peeling axis and an apparatus for practicing the method are disclosed. A plurality of swingable members are provided, each member having a contact surface which is swingable in contact with the peripheral surface of the log thereby to follows the peripheral profile of the log while it is being rotated about its preliminary axis. Angular positions of the contact surfaces are measured with respect to a reference position at a number of angularly spaced positions of the log. On the basis of the measured angular positions of the contact surfaces, radial distances of the log from a plurality of predetermined locations on the optimum peeling axis to selected contact surfaces are computed for comparison such radial distances. The distance having the greatest value is regarded as the maximum radius point of the log.
The photographing means of the present apparatus photographs a piece of wood, while the image processing means calculates degrees of circularity from the photographed images of the piece of wood, and detects images with significant degrees of circularity as knots. In addition, the image processing means 1 clips a portion including a knot from the photographed image of the piece of wood, deems a portion clipped at a predetermined threshold among the color spaces of each pixel of the clipped portions to be a blackened portion, and determines black portions with a high proportion of a number of pixels of the blackened portion to the number of pixels of the clipped portion of the knot as dead knots.
G01B 11/08 - Measuring arrangements characterised by the use of optical techniques for measuring diameters
G01N 21/892 - Investigating the presence of flaws, defects or contamination in moving material, e.g. paper, textiles characterised by the flaw, defect or object feature examined
A wood knot and a dead knot with bark can be infallibly detected. A piece of wood is imaged by imaging means (8). Image processing means (1) calculates the circularity of a portion of the captured image and judges the portion having a high calculated circularity as a knot. The knot portion is cut off from the wood image captured by the image processing means (1), parts cut off from the color space of the pixels of the knot portion with a predetermined threshold are judged as blackened parts, and the knot portion having a high ratio of the number of pixels of the blackened parts to the number of pixels of the knot portion is judged as a dead knot.
G01B 11/08 - Measuring arrangements characterised by the use of optical techniques for measuring diameters
G01N 21/892 - Investigating the presence of flaws, defects or contamination in moving material, e.g. paper, textiles characterised by the flaw, defect or object feature examined
The photographing means of the present apparatus photographs a piece of wood, while the image processing means calculates degrees of circularity from the photographed images of the piece of wood, and detects images with significant degrees of circularity as knots. In addition, the image processing means 1 clips a portion including a knot from the photographed image of the piece of wood, deems a portion clipped at a predetermined threshold among the color spaces of each pixel of the clipped portions to be a blackened portion, and determines black portions with a high proportion of a number of pixels of the blackened portion to the number of pixels of the clipped portion of the knot as dead knots.
A method of stacking a veneer sheet carried by a conveyer onto a pile of similar veneer sheets is disclosed. Veneer sheet is separated from the conveyer thereby to allow the sheet to drop from the conveyer toward the pile. The veneer sheet being dropped is restrained by an elongated flexible member which is lowered substantially simultaneously with the above separation and at such a speed that the flexible member is brought into frictional engagement with the veneer sheet at at least one side thereof which extends in substantially perpendicular relation to the length of the elongated flexible member. The flexible member is lowered until it is bent in pressing engagement with the veneer sheet then dropped onto the pile at the above side thereof. An apparatus for performing the method is also disclosed.
B65G 57/03 - Stacking of articles by adding to the top of the stack from above
B65H 29/36 - Delivering or advancing articles from machinesAdvancing articles to or into piles by dropping from tapes, bands, or rollers rolled from under the articles
62.
Method and apparatus of manufacturing glued laminated wood
A method and apparatus of manufacturing glued laminated wood such as laminated veneer lumber (LVL) are disclosed. The glued laminated wood is made of a number of wood sheets such as veneer sheets which are laminated together by a hot press with a thermosetting adhesive into a continuous length of multiple-layered board of the glued laminated wood wherein wood sheets in each layer of the multiple-layered board are arranged in a staggered relation in the lengthwise direction of the board to wood sheets in an adjacent layer. The hot press has a pair of heating plates arranged substantially in facing relation to each other and an auxiliary heating plate disposed adjacent to one end of each heating plate. The auxiliary heating plate is adapted to press part of wood sheet which extends out beyond the above end of the heating plate.
A method and apparatus of manufacturing glued laminated wood such as laminated veneer lumber (LVL) are disclosed. The glued laminated wood is made of a number of wood sheets such as veneer sheets which are laminated together by a hot press with a thermosetting adhesive into a continuous length of multiple- layered board of the glued laminated wood wherein wood sheets in each layer of the multiple-layered board are arranged in a staggered relation in the lengthwise direction of the board to wood sheets in an adjacent layer. The hot press has a pair of heating plates arranged substantially in facing relation to each other and an auxiliary heating plate disposed adjacent to one end of each heating plate. The auxiliary heating plate is adapted to press part of wood sheet which extends out beyond the above end of the heating plate.
B27D 1/04 - Joining wood veneer with any materialForming articles therebyPreparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefromPlywood sheets
B27D 3/02 - Veneer pressesPress platesPlywood presses with a plurality of press plates, i.e. multi-platen hot presses
B27G 11/00 - Applying adhesives or glue to surfaces of wood to be joined
B32B 21/13 - Layered products essentially comprising wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood
64.
VENEER LATHE AND METHOD OF CUTTING WOOD BLOCK BY THE VENEER LATHE
A method of cutting a wood block for production of veneer by a rotary veneer lathe is disclosed. The veneer lathe includes a knife carriage which has a veneer knife mounted therein and having a cutting edge, a number of rotatable peripheral drive wheels disposed at a spaced interval in parallel relation to the cutting edge of the veneer knife and each having on the circumferential periphery a number of tooth-like projections pierceable into the wood block adjacent to the cutting edge of the veneer knife for driving the wood block from the periphery thereof for rotation about its axis, and a guide member disposed adjacent to the drive wheel for guiding veneer peeled from the wood block. According to the invention, cutting of the wood block is done at a first position of the peripheral drive wheels where the veneer peeled from the wood block and moving past said guide member is pierced by the projections to such an extent that substantial splits are formed in the veneer along wood grain thereof by a force of the projections acting on the veneer, and also at a second position where the projections provide no force to the veneer moving past the guide member that causes the substantial splits in the veneer along wood grain thereof.
ABSTRACT OF THE DISCLOSURE A veneer lathe for turning the log by means of a rotary roller which is capable of continuing the cutting operation until the log being cut comes to have a diameter practically the same as the spindle diameter. Said veneer lathe comprises a boring unit, centering unit, a spindle conveying mechanism for conveying the log from the boring unit to the spindle means, rotary drive roller to turn the log and means for guiding the spindles and stopping the log movement. The log is formed with center bores by the boring unit. Through said center bores, the spindles are inserted to prevent the log from deflecting under the pressing force of the rotary roller. Upon completion of the turning operation, the spindles are removed out of the centerbores while the spindle guiding and log stopping means prevents the log from following the spindle removing action.
ABSTRACT OF THE DISCLOSURE Glued laminated wood which has a novel laminated structure and may be fabricated from small-sized veneer sheets, and method of manufacturing such laminated wood are provided. The glued laminated wood in its continuous form is made from a series of unit-length veneer sheets each having the same length and thickness which are lamina- ted in a laid-up arrangement in which each of the veneer sheets is lapped on another and offset therefrom in the direction of its length at a regular interval determined by the number of plies to be in the laminated wood products and the length of the unit veneer sheets. It has a novel structure in that each veneer sheet therein has tandemly spaced straight length portions which are parallel to each other, but successively displaced from each other in the direction of the thickness of the product, there being a somewhat S-shaped curved length portion of the veneer sheet between any successive pair of these straight length portions. The number of such straight length portions in each unit veneer sheet is equal to the number of plies in the glued laminated wood being made, and the length of each such straight length portion is nominally determined by dividing the length of the unit veneer sheet by the number of plies.
B27D 1/04 - Joining wood veneer with any materialForming articles therebyPreparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefromPlywood sheets
B32B 21/13 - Layered products essentially comprising wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood
B32B 21/14 - Layered products essentially comprising wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
