Scarf Processing Equipment

Abstract

[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.

Description

[Technical field]

[0001] The present invention relates to a scarf processing device that processes a scarf surface on a first end portion of a veneer in a grain direction while transporting the veneer. [Background technology]

[0002] Japanese Patent Publication No. 2009-73202 (Patent Document 1) describes a scarf processing device that includes a support table with a support surface capable of supporting both ends of a veneer in the grain direction, a circular saw arranged near both ends of the veneer so as to process scarf surfaces on both ends of the veneer, and a pressing unit arranged near the contact point where the circular saw and the veneer first come into contact so as to press the veneer against the support surface.

[0003] With this scarf processing device, scarf processing is performed in a state in which both ends of the veneer are pressed against the support surface by the pressing section near the contact point where the circular saw and the veneer first come into contact, i.e., in a state in which any irregularities such as twists and warping at both ends of the veneer are corrected, so that a good scarf surface can be obtained. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2009-73202 A Summary of the Invention [Problem to be solved by the invention]

[0005] From the viewpoint of improving productivity, a scarf processing device has been proposed that processes scarf surfaces on both ends of a veneer while the veneer is being conveyed. In order to realize a good scarf surface, the scarf processing device may be provided with a pressing unit as in the scarf processing device described in the above publication. However, in a scarf processing device that processes scarf surfaces on both ends of a veneer while the veneer is being conveyed, frictional forces act between both ends of the veneer and the pressing unit and the support surface in the direction opposite to the conveying direction, so that, for example, if both ends of the veneer have cracks or fissures, a good scarf surface may not be realized. In other words, the frictional force generated between both ends of the veneer and the pressing portion and supporting surface may act in a direction that widens cracks or fissures at both ends of the veneer, resulting in damage to the scarf surface, or the scarf processing may be performed with the cracks or fissures in an expanded state, resulting in unscarfed areas, or after the scarf processing is performed with the cracks or fissures in an expanded state, the elasticity of the veneer may cause the expanded cracks or fissures to return to their original state, resulting in steps on the scarf surface. There is still room for improvement in terms of achieving both increased productivity and a good scarf surface.

[0006] The present invention has been made in consideration of the above, and one of its objects is to provide a technology that contributes to achieving both improved productivity and the realization of a good scarf surface. [Means for solving the problem]

[0007] In order to achieve the above object, the scarf processing apparatus of the present invention employs the following means.

[0008] According to a preferred embodiment of the scarf processing device of the present invention, a scarf processing device is configured to process a scarf surface on a first end of a veneer in the fiber direction while transporting the veneer. The scarf processing device includes a frame, a holding and transporting unit arranged on the frame so as to be movable in the transporting direction, a processing unit having a cutting blade capable of processing a scarf surface, a first end transporting unit having a placing unit capable of placing the first end at least at a contact position where the first end and the cutting blade first come into contact, and a pressing unit at least a part of which is arranged inside a projection area of ​​the placing unit on a second virtual projection plane when viewed from one side in the vertical direction. The holding and transporting unit has a holding unit capable of holding the veneer in a state in which the first end protrudes and the protruding first end extends in the transporting direction of the veneer. The processing unit is arranged in the middle of the transporting path of the veneer so that the projection of the first end and the projection of the cutting blade on the first virtual projection plane when viewed from one side in the transporting direction intersect. The first end transport section can transport the first end in the transport direction at least at the contact position and at a pressing position that is upstream of the contact position in the transport direction and adjacent to the contact position, and the pressing section can press the first end toward the placement section at the pressing position.

[0009] Here, the "contact position" in the present invention is typically a virtual straight line passing through the intersection of the projection of the first end of the veneer and the projection of the cutting blade on a virtual projection plane when the state when the first end of the veneer and the cutting blade first come into contact with each other is viewed from one side in the vertical direction, and corresponds to the position of a virtual orthogonal line perpendicular to the conveying direction. Furthermore, the "pressing position adjacent to the contact position" in the present invention preferably includes not only the contact position itself, but also a position separated by a predetermined distance from the contact position. Here, the predetermined distance is preferably closer to the contact position, but is a concept that includes, for example, a distance of less than half the length of the veneer in the conveying direction. Note that the embodiment in which the pressing position is disposed at a predetermined distance from the contact position preferably includes an embodiment in which a third object (such as a cover) is disposed between the pressing position and the contact position.

[0010] According to the present invention, the first end of the veneer where the scarf surface is to be processed can be transported in the same direction as the veneer transport direction by the first end transport unit, so that the frictional force acting on the first end in the opposite direction to the transport direction due to the first end being pressed by the pressing unit can be reduced. This can reduce the moment acting in the direction to widen the crack or crack caused by the frictional force described above or to close the crack or crack excessively when the first end has a crack or crack. As a result, it is possible to effectively suppress defects in the scarf surface, the generation of unscarfed parts due to scarfing in a widened crack or crack state, or the step on the scarf surface caused by scarfing in a closed crack or crack state and then returning (opening) the crack or crack to its original state (opening) due to the elasticity of the veneer.

[0011] In addition, when the dimension of the veneer in the direction along the fiber direction (the dimension of the veneer in the direction perpendicular to both the conveying direction and the thickness direction of the veneer) is changed, the protruding amount of the first end from the holding part changes, but when the protruding amount increases, in a conventional scarf processing device, i.e., a scarf processing device without a first end conveying part, it is necessary to relocate the processing part and the pressing part in a direction away from the holding part (protruding direction) based on the increase in the protruding amount of the first end. However, when the distance between the processing part and the pressing part and the holding part, more specifically, the distance from the holding part to the processing part and the pressing part (the distance in the direction perpendicular to both the conveying direction and the thickness direction of the veneer) increases, the moment described above increases, so it is necessary to change the location of the holding part so that the distance from the holding part to the processing part and the pressing part is maintained at a predetermined distance or less. As a result, the degree of improvement of the scarf processing device increases. According to the present invention, since the above-mentioned moment can be reduced, it is no longer necessary to maintain the distance from the holding portion to the processing portion and the pressing portion (the distance in the direction perpendicular to both the conveying direction and the thickness direction of the veneer) at or below a predetermined distance. Therefore, it is only necessary to rearrange the processing portion and the pressing portion, and the increase in the degree of improvement of the scarf processing device can be suppressed.

[0012] In addition, since the pressing section can press the first end toward the placement section, the scarf processing can be performed while correcting any irregularities such as twists and warping that occur at the first end. In addition, since the scarf surface is processed on the first end while the veneer is being transported, productivity can be improved compared to a structure in which the scarf surface is processed on the first end while the transport of the veneer is temporarily stopped.

[0013] According to a further embodiment of the scarf processing device of the present invention, the first end transport section is a conveyor having an endless belt as a placement section. The endless belt has a first surface on which the first end can be placed and a second surface paired with the first surface. The first end has a third surface that can contact the first surface and a fourth surface paired with the third surface. The pressing section has a first contact section that can contact the fourth surface and is disposed opposite the first surface. A first distance from a projection on a first virtual projection plane of the first contact section of the pressing section in a pressing state to a projection of the first surface on the first virtual projection plane is equal to or less than the plate thickness of the first end.

[0014] According to this embodiment, the first end can be reliably pressed against the endless belt by the pressing portion, and the first end can be reliably conveyed in the conveying direction, so that defects in the scarf surface, the occurrence of unfinished scarf portions, and the occurrence of steps in the scarf surface can be more reliably prevented.

[0015] According to a further embodiment of the scarf processing device of the present invention, the first end conveying section further includes a support section arranged on the opposite side of the holding section with respect to the first end conveying section and adjacent to the first end conveying section when viewed from one side of the conveying direction so as to be able to support the first end at least at the contact position. The pressing section further includes a second abutting section that can abut against the fourth surface. The support section includes a third abutting section that can abut against the third surface and is arranged opposite to the second abutting section. The second distance from the projection of the second abutting section of the pressing section in the pressing state on the first virtual projection plane to the projection of the third abutting section on the first virtual projection plane is equal to or less than the plate thickness of the first end. In the present invention, the "position adjacent to the first end conveying section" preferably includes a position in contact with the first end conveying section as well as a position separated by a predetermined distance from the first end conveying section. Here, the predetermined distance is preferably closer to the first end transport part, but is defined as a distance within a range in which the distance between the first end transport part and the support part is smaller than the distance between the first end transport part and the holding part, for example. Note that the mode in which the first end transport part is disposed at a position separated by a predetermined distance from the support part preferably includes a mode in which a third object is disposed between the first end transport part and the support part.

[0016] According to this embodiment, the first end can be reliably pressed against the endless belt by the pressing part, and the first end can be reliably pressed against the support part by the pressing part. This allows the first end to be reliably conveyed in the conveying direction, so that defects on the scarf surface, the occurrence of unscarfed parts, and the occurrence of steps on the scarf surface can be more reliably prevented, and the scarf processing can be performed in a state where any irregularities such as twists and warps that occur on the first end are corrected.

[0017] According to a further embodiment of the scarf processing device of the present invention, the conveyor includes a first pulley around which an endless belt is wound, and a motor connected to the first pulley so as to rotate the first pulley. The first pulley is capable of contacting a first surface. The coefficient of friction between the first pulley and the first surface is greater than the coefficient of friction between the first pulley and the second surface.

[0018] According to this aspect, the rotational driving force of the first pulley can be reliably transmitted by the endless belt, thereby improving the conveying performance of the first end portion in the conveying direction.

[0019] According to a further aspect of the scarf processing apparatus of the present invention, the pressing portion includes a first pressing portion having a first contact portion, and a second pressing portion having a second contact portion.

[0020] According to this embodiment, the first end can be reliably pressed against the endless belt by the first pressing unit. This allows the first end to be reliably conveyed in the conveying direction, so that it is possible to more reliably prevent defects in the scarf surface, the occurrence of unscarfed parts, and the occurrence of steps in the scarf surface. In addition, the second pressing unit can reliably press the first end against the support unit. This allows the scarf processing to be applied to the first end in a stable state, so that a good scarf surface can be ensured.

[0021] According to a further embodiment of the scarf processing device of the present invention, when viewed from one side in the conveying direction, the scarf processing device further includes a support portion arranged adjacent to the first end conveying portion on the opposite side of the holding portion with respect to the first end conveying portion so as to be able to support the first end portion at least at the contact position. The first end conveying portion has a disk body having an outer peripheral surface as a placement portion, and a drive portion capable of rotating the disk body. The first end portion has a fifth surface capable of contacting the outer peripheral surface, and a sixth surface paired with the fifth surface. The pressing portion also has a fourth contact portion and a fifth contact portion capable of contacting the sixth surface. The supporting portion also has a sixth contact portion capable of contacting the fifth surface. The fourth contact portion is arranged opposite the outer peripheral surface. The fifth contact portion is arranged opposite the supporting portion. The pressing portion in the pressing state PartA third distance from the projection of the fourth contact portion on the first virtual projection plane to the projection of the outer circumferential surface on the first virtual projection plane is equal to or less than the plate thickness of the first end portion. A fourth distance from the projection of the fifth contact portion of the pressing portion in the pressing state on the first virtual projection plane to the projection of the sixth contact portion on the first virtual projection plane is equal to or less than the plate thickness of the first end portion. In the present invention, the "position adjacent to the first end portion conveying portion" preferably includes a position in contact with the first end portion conveying portion as well as a position separated by a predetermined distance from the first end portion conveying portion. Here, the predetermined distance is preferably closer to the first end portion conveying portion, but is defined as a distance within a range in which the distance between the first end portion conveying portion and the support portion is smaller than the distance between the first end portion conveying portion and the holding portion. Note that the embodiment in which the first end portion conveying portion is disposed at a position separated by a predetermined distance from the support portion preferably includes an embodiment in which a third object is disposed between the first end portion conveying portion and the support portion.

[0022] According to this embodiment, the first end can be reliably pressed against the outer peripheral surface of the disk body by the pressing unit. This allows the first end to be reliably transported in the transport direction, and therefore it is possible to more reliably prevent defects on the scarf surface, the occurrence of unscarfed parts, and the occurrence of steps on the scarf surface. In addition, the first end can be reliably pressed against the support unit by the pressing unit. This allows the scarf processing to be performed while correcting any irregularities such as twists and warps that occur on the first end.

[0023] According to a further embodiment of the scarf processing device of the present invention, the disk body has irregularities on the outer circumferential surface.

[0024] According to this embodiment, compared to a disc body without an uneven outer circumferential surface, a disc body with an uneven outer circumferential surface can increase the frictional force generated between the outer circumferential surface of the disc body and the first end when the disc body rotates, so that the first end can be transported reliably in the transport direction. This makes it possible to more reliably prevent damage to the scarf surface, the occurrence of unfinished scarf areas, and the occurrence of steps on the scarf surface. Here, "frictional force" includes piercing.

[0025] According to a further embodiment of the scarf processing device of the present invention, the scarf processing device further includes a control unit for controlling the holding and conveying unit and the first end portion conveying unit. The control unit determines the conveying speed of the first end portion by the first end portion conveying unit based on the moving speed of the holding and conveying unit in the conveying direction, and controls the first end portion conveying unit so that the first end portion is conveyed at the determined conveying speed.

[0026] According to this aspect, the speed at which the first end of the veneer is conveyed in the conveying direction by the first end conveying unit can be set based on the speed at which the veneer is conveyed in the conveying direction by the holding and conveying unit, thereby more effectively reducing the moment that widens cracks or fissures in the first end.

[0027] According to a further aspect of the scarf processing apparatus of the present invention, the control unit controls the conveying speed of the first end portion by the first end portion conveying unit to be slower than the conveying speed of the veneer by the holding and conveying unit until the first end portion reaches the contact position. First end conveying section Control.

[0028] According to this embodiment, the speed at which the first end is conveyed by the first end conveying section is slower than the speed at which the veneer is conveyed by the holding and conveying section, so that the first end is subjected to a frictional force in the opposite direction to the conveying direction until the first end reaches the contact position. If there is a crack or tear in the first end on the downstream side of the conveying direction, the frictional force acts in a direction to close the crack or tear. This makes it possible to prevent the occurrence of an unscarfed portion caused by scarfing in a state where the crack or tear is widened. As a result, even if there is a crack or tear in the first end on the downstream side of the conveying direction, the scarfing can be performed satisfactorily.

[0029] According to a further aspect of the scarf processing device of the present invention, the control unit controls the conveying speed of the first end portion by the first end portion conveying unit to be faster than the conveying speed of the veneer by the holding and conveying unit after the first end portion reaches the contact position. First end conveying section Control.

[0030] According to this embodiment, since the conveying speed of the first end by the first end conveying section is faster than the conveying speed of the veneer by the holding conveying section, after the first end reaches the contact position, the first end is subjected to a frictional force in the same direction as the conveying direction. If there is a crack or tear in the first end on the upstream side of the conveying direction, the frictional force acts in a direction to close the crack or tear. This makes it possible to prevent the occurrence of an unscarfed portion caused by scarfing in a state where the crack or tear is widened. As a result, even if there is a crack or tear in the first end on the upstream side of the conveying direction, the scarfing can be performed satisfactorily.

[0031] According to a further aspect of the scarf processing apparatus of the present invention, the control unit controls the conveying speed of the first end portion by the first end portion conveying unit to be equal to the conveying speed of the veneer by the holding and conveying unit. First end conveying section Control.

[0032] According to this embodiment, even if there is a crack or fissure at the first end, the frictional force from the conveying surface can be prevented from acting in a direction that excessively closes or opens the crack or fissure. This effectively prevents defects on the scarf surface, the generation of unscarfed areas caused by scarfing with the crack or fissure widened, or unevenness on the scarf surface caused by scarfing with the crack or fissure closed and then returning (opening) to its original state due to the elasticity of the veneer. As a result, even if there is a crack or fissure at the first end, the scarfing can be performed satisfactorily. Effect of the Invention

[0033] According to the present invention, it is possible to provide a scarf processing device that contributes to achieving both improved productivity and the realization of a good scarf surface. [Brief description of the drawings]

[0034] [Figure 1] 1 is a diagram showing an outline of the configuration of a scarf processing system including a scarf processing device 1 according to the present embodiment. [Diagram 2] 1 is a diagram showing an outline of the configuration of a scarf processing device 1 according to the present embodiment. [Diagram 3] 1 is a side view of a scarf processing device 1 according to an embodiment of the present invention, seen from a side perpendicular to the longitudinal direction. [Figure 4] FIG. 1 is a front view of a scarf processing device 1 according to an embodiment of the present invention, as viewed from one side in the longitudinal direction. [Diagram 5] 2 is a perspective view showing the outline of the configuration of a pinch-and-transport unit 4. FIG. [Figure 6] FIG. 4 is a cross-sectional view showing the section AA of FIG. [Figure 7] FIG. 2 is a three-view diagram of the clamping and conveying section 4. [Figure 8] 13 is an explanatory diagram showing a state in which a veneer 90 is clamped by clamping bars 28, 28, 29, and 29. FIG. [Figure 9] 2 is a diagram showing an outline of the configuration of processing units 6, 7 and support tables 8, 9. FIG. [Figure 10] 13 is an explanatory diagram showing the positional relationship between pressing portions 56, 57, circular saw contact portions 54, 55, and endless belts BLT, BLT. FIG. [Figure 11] 10 is an explanatory diagram showing the positional relationship between circular saw contact portions 54, 55, auxiliary conveyors 60, 62, and clamping bars 28, 29. FIG. [Figure 12] 13 is an explanatory diagram showing the pressing portions 56, 57 in a state in which the pressure on the veneer 90 is released. FIG. [Figure 13] FIG. 2 is a diagram showing the schematic configuration of auxiliary conveyors 60 and 62. [Figure 14] This is an explanatory diagram showing the positional relationship between the abutment portions 58, 59, the upper surfaces 54a, 55a of the circular saw abutment portions 54, 55, the outer surfaces OS, OS and inner surfaces IS, IS of the endless belts BLT, BLT, the supporting surfaces 50a, 52a, and the upper surface 91 and lower surface 93 of the veneer 90. [Figure 15] FIG. 1 is a plan view of a veneer 90 having cracks Cr1 and Cr2. [Figure 16]This is an explanatory diagram showing the positional relationship between the abutment portions 158, 159, 258, 259, the upper surfaces 54a, 55a of the circular saw abutment portions 54, 55, the outer surfaces OS, OS and inner surfaces IS, IS of the endless belts BLT, BLT, the supporting surfaces 50a, 52a, and the upper surface 91 and lower surface 93 of the veneer 90. [Figure 17] 13 is a schematic diagram showing the configuration of disk conveying mechanisms 360, 362 of a scarf processing device 300 according to a modified example. FIG. [Figure 18] 13 is a schematic diagram showing the configuration of disk conveying mechanisms 460, 462 of a scarf processing device 400 according to a modified example. FIG. [Figure 19] 13 is a schematic diagram showing the configuration of disk conveying mechanisms 560, 562 of a scarf processing apparatus 500 according to a modified example. FIG. [Figure 20] 13 is an explanatory diagram showing the positional relationship between abutment portions 58, 59, upper surfaces 54a, 55a of circular saw abutment portions 54, 55, outer peripheral surfaces 361a, 363a of discs 361, 363, and upper surface 91 and lower surface 93 of veneer 90. FIG. [Figure 21] 13 is an explanatory diagram showing the positional relationship between abutment portions 58, 59, upper surfaces 54a, 55a of circular saw abutment portions 54, 55, outer peripheral surfaces 461a, 463a, 561a, 563a of discs 461, 463, 561, 563, and upper surface 91 and lower surface 93 of veneer 90. FIG. [Figure 22] 13 is an external view showing the external appearance of a pinch and conveyance unit 604 of a modified example. FIG. [Diagram 23] 13 is an external view showing the external appearance of a pinch and conveyance unit 704 of a modified example. FIG. [Figure 24] 13 is a schematic diagram showing the outline of the configuration of support bases 8A and 9A of modified examples. FIG. [Diagram 25] FIG. 13 is a schematic diagram showing the schematic configuration of support bases 808A and 809A of modified examples. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0035] Next, the best mode for carrying out the present invention will be described with reference to examples. EXAMPLES

[0036] As shown in Fig. 1, the scarf processing device 1 according to the embodiment of the present invention is configured as a device that processes scarf surfaces on both ends 90a, 90b in the fiber direction FD of a veneer 90 carried in by a carry-in conveyor 80, and carries out the veneer 90 with the processed scarf surface to an unloading conveyor 82. As shown in Figs. 2 to 4, the scarf processing device 1 includes a frame 2 having a longitudinal direction, a clamping conveying unit 4 arranged on the frame 2 so as to be movable in the longitudinal direction of the frame 2, a pair of processing units 6, 7 arranged in the middle of the longitudinal direction of the frame 2, a pair of support tables 8, 9 (see Fig. 4 for the support table 9) arranged near the pair of processing units 6, 7, and a control device 70 that controls the entire scarf processing device 1. The both ends 90a, 90b correspond to the "first end" in the present invention, and "the middle of the longitudinal direction of the frame 2" is an example of an embodiment corresponding to "the middle of the conveying path of the veneer" in the present invention.

[0037] As shown in Fig. 1, the frame 2 has a longitudinal direction that corresponds to the transport direction TD in which the veneer 90 is transported. As shown in Fig. 2, the frame 2 includes a pair of upper beams 12a, 12b and a pair of lower beams 12c, 12d extending in the longitudinal direction, and base bodies 14a, 14b connected to both longitudinal ends of the pair of upper beams 12a, 12b and the pair of lower beams 12c, 12d.

[0038] As shown in Fig. 6, a pair of upper and lower guide rails R1, R1 are arranged on the inner surfaces of the pair of upper beams 12a, 12b (surfaces facing each other among the surfaces of the pair of upper beams 12a, 12b) (also see Fig. 2). Similarly, a pair of upper and lower guide rails R2, R2 are arranged on the inner surfaces of the pair of lower beams 12c, 12d (surfaces facing each other among the surfaces of the pair of lower beams 12c, 12d) (also see Fig. 2). As shown in Fig. 2, the guide rails R1, R1, R2, R2 extend over the entire longitudinal area of ​​the upper beams 12a, 12b and the lower beams 12c, 12d.

[0039] The base bodies 14a and 14b basically have the same shape. As shown in Fig. 2 and Fig. 4, the base bodies 14a and 14b are composed of a pair of legs 15a, 15a, 15b, 15b, and upper beams 16a, 16b and lower beams 17a, 17b connected to the pair of legs 15a, 15a, 15b, 15b. In other words, the base bodies 14a and 14b can be said to have a substantially A-shape when viewed from one side in the longitudinal direction. Note that an input conveyor 80 is disposed on the base body 14a side, and an output conveyor 82 is disposed on the base body 14b side (see Fig. 1).

[0040] As shown in Fig. 5 and Fig. 7, the clamping and conveying section 4 is composed of an upper clamping body 20 and a lower clamping body 22. The upper clamping body 20 and the lower clamping body 22 basically have the same configuration. The upper clamping body 20 and the lower clamping body 22 have main bodies 20a, 22a having a substantially H-shape in a plan view, four air cylinders 24a, 24a, 24a, 24a, 26a, 26a, 26a, 26a arranged in the main bodies 20a, 22a, clamping bars 28, 28 fixed to rods 25, 25, 25, 25 of the air cylinders 24a, 24a, 24a, 24a, and clamping bars 29, 29 fixed to rods 27, 27, 27, 27 of the air cylinders 26a, 26a, 26a, 26a. The clamping and conveying section 4 is a feature that corresponds to a "holding and conveying section" of the present invention, and the clamping bars 28 and 29 are an example of a feature that corresponds to a "holding section" of the present invention.

[0041] As shown in Figures 5 and 7, the main body portion 20a and the main body portion 22a are composed of a pair of vertical pieces 30a, 30a and a pair of vertical pieces 32a, 32a, and horizontal pieces 30b and 32b connecting the vertical pieces 30a, 30a and the vertical pieces 32a, 32a at approximately the longitudinal center of the pair of vertical pieces 30a, 30a and the pair of vertical pieces 32a, 32a, and have an approximately H-shape when viewed in a plane.

[0042] As shown in Figs. 5 to 7, a pair of upper and lower guide parts 31, 31 are arranged on the outer side of the pair of vertical pieces 30a, 30a (the side opposite to the side to which the horizontal piece 30b is connected). Also, as shown in Figs. 5 to 7, a pair of upper and lower guide parts 33, 33 are arranged on the outer side of the pair of vertical pieces 32a, 32a (the side opposite to the side to which the horizontal piece 32b is connected). As shown in Figs. 6, the guide parts 31, 31 and the guide parts 33, 33 can be engaged with the guide rails R1, R1 and the guide rails R2, R2. That is, the upper clamping body 20 is slidably supported by the upper beams 12a, 12b via the guide parts 31, 31 and the guide rails R1, R1, and the lower clamping body 22 is slidably supported by the lower beams 12c, 12d via the guide parts 33, 33 and the guide rails R2, R2. The upper clamping body 20 and the lower clamping body 22 are disposed symmetrically with respect to a virtual horizontal plane VHP (see FIG. 7).

[0043] As shown in Figs. 5 to 7, female threaded bodies 34, 35 are fixed to the horizontal pieces 30b, 32b. The female threaded body 34 is threadedly engaged with a male threaded rod 36 rotatably supported by the upper beams 16a, 16b of the base bodies 14a, 14b. The male threaded rod 36 is rotated by a motor M1 fixed to the upper beam 16b. The female threaded body 35 is threadedly engaged with a male threaded rod 37 rotatably supported by the lower beams 17a, 17b of the base bodies 14a, 14b. The male threaded rod 37 is rotated by a motor M2 fixed to the lower beam 17b. That is, the motors M1, M2 rotate the male threaded rods 36, 37 in the forward and reverse directions, so that the upper clamping body 20 and the lower clamping body 22 are reciprocated in the longitudinal direction of the upper beams 12a, 12b and the lower beams 12c, 12d.

[0044] As shown in Fig. 7, the air cylinders 24a, 24a, 24a are disposed at both ends of the vertical pieces 30a in the longitudinal direction, on the inner surface of the vertical pieces 30a (the surface to which the horizontal pieces 30b are connected). The air cylinders 26a, 26a, 26a, 26a are disposed at both ends of the vertical pieces 32a in the longitudinal direction, on the inner surface of the vertical pieces 32a (the surface to which the horizontal pieces 32b are connected). The air cylinders 24a, 24a, 24a, 26a, 26a, 26a, 26a are driven in the direction in which the rods 25, 25, 25, 25, 27, 27, 27 protrude, so that the clamping bars 28, 28 and the clamping bars 29, 29 approach each other. As a result, the veneer 90 is clamped between the clamping bars 28, 28 and the clamping bars 29, 29. Meanwhile, the air cylinders 24a, 24a, 24a, 24a, 26a, 26a, 26a, 26a are driven in the direction in which the rods 25, 25, 25, 25, 27, 27, 27, 27 are retracted, so that the clamping bars 28, 28 and the clamping bars 29, 29 move away from each other. As a result, the clamping of the veneer 90 by the clamping bars 28, 28 and the clamping bars 29, 29 is released. The clamping bars 28, 28 and the clamping bars 29, 29 clamp the veneer 90 with both ends 90a, 90b protruding as shown in FIG. 8.

[0045] In this way, the clamping and conveying section 4 clamps the veneer 90 carried in from the input conveyor 80 between the clamping bars 28, 28 and the clamping bars 29, 29, and moves in the conveying direction TD to convey the veneer 90 to the output conveyor 82.

[0046] The processing units 6 and 7 basically have the same configuration, and are equipped with circular saws 40a and 41a and motors 40b and 41b having rotation shafts RS and RS, as shown in Fig. 6. The circular saws 40a and 41a are connected to the motors 40b and 41b via the rotation shafts RS and RS. The circular saws 40a and 41a are an example of an embodiment corresponding to the "cutting blade" of the present invention.

[0047] The motor 40b is fixed to the outer surface of the upper beam 12a (the surface of the pair of upper beams 12a facing the opposite side to the upper beam 12b side) via a bracket BR, and the motor 41b is fixed to the outer surface of the lower beam 12d (the surface of the pair of lower beams 12d facing the opposite side to the lower beam 12c side) via a bracket BR, as shown in Fig. 6. That is, the processing units 6, 7 are arranged in a positional relationship that is point-symmetrical with respect to the center point P1 of the virtual line segment VL connecting the centers of the male threaded rods 36, 37 on a virtual projection plane when viewed from one side in the longitudinal direction of the frame 2 (one side in the conveying direction TD of the veneer 90), that is, when viewed from one side in the extension direction of both end portions 90a, 90b of the veneer 90 (the direction perpendicular to the paper surface of Fig. 6).

[0048] In addition, as shown in Figure 6, the processing sections 6, 7 are arranged in a positional relationship where the projection of the circular saws 40a, 41a on the virtual projection plane intersects with the projection of both end portions 90a, 90b of the veneer 90 (part of the projection of both end portions 90a, 90b is included inside the projection of the circular saws 40a, 41a).

[0049] The processing units 6, 7 arranged in this manner process parallel scarf surfaces on both end portions 90a, 90b of the veneer 90. The processing units 6, 7 are arranged at approximately the middle position in the longitudinal direction of the frame 2, and process scarf surfaces on both end portions 90a, 90b while the clamping and conveying unit 4 is conveying the veneer 90 to the discharge conveyor 82.

[0050] 9, the support bases 8, 9 have bases 50, 52, circular saw contact parts 54, 55 integrated with the bases 50, 52, pressing parts 56, 57 supported on the bases 50, 52 so as to be able to swing freely via swing shafts SS, SS, and auxiliary conveyors 60, 62 supported on the bases 50, 52. The auxiliary conveyors 60, 62 are an example of an embodiment corresponding to the "first end transport part" and "conveyor" of the present invention.

[0051] 9, the bases 50, 52 have support surfaces 50a, 52a on which both end portions 90a, 90b of the veneer 90 can be placed. Circular saw contact portions 54, 55, which will be described later, are arranged on the support surfaces 50a, 52a. The support surfaces 50a, 52a also have a function of suppressing deflection of endless belts BLT, BLT, which will be described later.

[0052] The base 50 is fixed to the outer surface of the lower beam 12c (the surface of the lower beam 12c facing the opposite side to the lower beam 12d side), as shown in Fig. 8, and the base 52 is fixed to the outer surface of the upper beam 12b (the surface of the upper beam 12b facing the opposite side to the upper beam 12a side), as shown in Fig. 8. That is, the support bases 8 and 9 are arranged in a positional relationship that is point-symmetrical with respect to the center point P1 on a virtual projection plane when viewed from one side in the longitudinal direction of the frame 2 (one side in the transport direction TD of the veneer 90), that is, when viewed from one side in the extension direction of both end portions 90a and 90b of the veneer 90 (the direction perpendicular to the paper surface of Fig. 8).

[0053] The circular saw contact parts 54, 55 function as circular saw supports when processing scarf surfaces on both ends 90a, 90b of the veneer 90, and are arranged at positions on the mounting surfaces 50a, 52a of the bases 50, 52 where the blades of the circular saws 40a, 41a contact, as shown in Figures 9 and 10. In this embodiment, the circular saw contact parts 54, 55 are set so that the upper surfaces 54a, 55a (surfaces facing the later-described contact parts 58, 59) are flush with the mounting surfaces 50a, 52a, as shown in Figure 14. The circular saw contact parts 54, 55 are preferably made of synthetic resin, wood, or the like. The circular saw blades 40a, 41a and both ends 90a, 90b of the veneer 90 first come into contact at a point CP where the projections of the circular saw blades 40a, 41a and the circular saw abutments 54, 55 intersect on the virtual projection plane when viewed from one side in the vertical direction (perpendicular to the paper surface of FIG. 10). Hereinafter, a virtual orthogonal line passing through the point CP and perpendicular to the conveying direction TD is referred to as a "contact position CpL". The bases 50, 52 and the circular saw abutments 54, 55 correspond to the "supporting portion" of the present invention, and the upper surfaces 54a, 55a are an example of an embodiment corresponding to the "third abutment portion" of the present invention. The virtual projection plane when viewed from one side in the vertical direction (perpendicular to the paper surface of FIG. 10) is an example of an embodiment corresponding to the "second virtual projection plane" of the present invention.

[0054] The pressing portions 56, 57 are composed of lever portions 56a, 57a having an approximately inverted L-shape when viewed from one side in the axial direction of the oscillating shafts SS, SS (see Figure 9), connection portions 56b, 57b extending from the tip ends of the first pieces 56a1, 57a1 of the lever portions 56a, 57a along the axial direction of the oscillating shafts SS, SS (see Figures 10 and 11), pressing arms 56c, 57c extending from the extending ends of the connection portions 56b, 57b (the ends opposite the ends connected to the first pieces 56a1, 57a1) in the same direction as the extending direction of the second pieces 56a2, 57a2 of the lever portions 56a, 57a (see Figures 9 and 10), and air cylinders 56d, 57d having rods R, R (see Figure 9).

[0055] As shown in Fig. 9, the lever parts 56a, 57a are supported by the swing shafts SS, SS at the intersections of the first pieces 56a1, 57a1 and the second pieces 56a2, 57a2. The swing shafts SS, SS are fixed to the bases 50, 52. As shown in Fig. 10, the pressing arms 56c, 57c are disposed inside the projection areas of the circular saw contact parts 54, 55 and the endless belts BLT, BLT described later on a virtual projection plane when viewed from one side in the vertical direction (direction perpendicular to the paper surface of Fig. 10). In other words, it can be said that the connecting parts 56b, 57b have a length such that the pressing arms 56c, 57c are disposed directly above the circular saw contact parts 54, 55 and the endless belts BLT, BLT.

[0056] In addition, the pressing arms 56c and 57c are and Figure 10 9, the connecting portions 56b, 57b extend horizontally for a predetermined distance from the extended ends thereof, and then have bent portions 56b1, 57b1 that are bent downward. The bent portions 56b1, 57b1 have contact portions 58, 59 that contact both ends 90a, 90b of the veneer 90. The surfaces of the contact portions 58, 59 that face the circular saw contact portions 54, 55 and the endless belts BLT, BLT have an inclination that gradually approaches the circular saw contact portions 54, 55 and the endless belts BLT, BLT toward the tip side (left side in FIG. 9). The contact portions 58, 59 are preferably made of a synthetic resin or the like that has a relatively small coefficient of friction. The surfaces of the contact portions 58, 59 facing the circular saw contact portions 54, 55 and the endless belts BLT, BLT are examples of configurations that correspond to the "second contact portion" and the "first contact portion" of the present invention, respectively.

[0057] As shown in Fig. 9, the air cylinders 56d, 57d are connected to the tip of the second piece 56a2, 57a2 via the rods R, R. The air cylinders 56d, 57d are supported on the bases 50, 52 via the block bodies Br, Br so as to be swingable on the side opposite to the side where the rods R, R are arranged. When the air cylinders 56d, 57d are driven in the direction in which the rods R, R are retracted, the pressing parts 56, 57 swing (rotate) counterclockwise (counterclockwise in Fig. 9) around the swing axis SS, SS, so that the pressing parts 56, 57, more specifically, the abutting parts 58, 59, press both ends 90a, 90b of the veneer 90 toward the circular saw abutting parts 54, 55 and the endless belts BLT, BLT, which will be described later. The abutting parts 58, 59 contact both ends 90a, 90b in a line contact state.

[0058] On the other hand, when the air cylinders 56d, 57d are driven in the direction in which the rods R, R are extended, the pressing portions 56, 57 oscillate (rotate) clockwise (clockwise in FIG. 12) around the oscillation axes SS, SS, thereby releasing the pressure applied to both ends 90a, 90b of the veneer 90 by the pressing portions 56, 57, more specifically, the abutment portions 58, 59.

[0059] 10, the contact portions 58 and 59 are set upstream of the contact position CpL in the transport direction TD and are set to contact both ends 90a and 90b of the veneer 90 at a pressing position PpL adjacent to the contact position CpL. It is desirable to locate the contact position CpL and the pressing position PpL as close as possible.

[0060] The auxiliary conveyors 60 and 62 basically have the same configuration. As shown in Fig. 13, the auxiliary conveyors 60 and 62 have four pulleys Pr1, Pr2, Pr3, and Pr4, an endless belt BLT wound around the four pulleys Pr1, Pr2, Pr3, and Pr4, and a motor M3 having a rotating shaft (not shown) connected to the pulley Pr3. The endless belt BLT is an example of an embodiment corresponding to the "mounting unit" in the present invention.

[0061] As shown in Fig. 13, the pulleys Pr1 and Pr1 are rotatably supported by the support arms 61a and 63a fixed to the bases 50 and 52, respectively, and the pulleys Pr2 and Pr2 are rotatably supported by the support arms 61b and 63b fixed to the bases 50 and 52, respectively. As shown in Figs. 10 and 11, the support arms 61a, 63a, 61b and 63b are fixed to the inner surfaces of the bases 50 and 52 (surfaces of the bases 50 and 52 facing the clamping bars 28 and 29). As shown in Fig. 13, the support arms 61a and 63a protrude from the bases 50 and 52 in the conveying direction TD of the veneer 90, and the support arms 61b and 63b protrude from the bases 50 and 52 in the opposite direction to the conveying direction TD of the veneer 90. The support arms 61a and 63a and the support arms 61b and 63b are disposed at the same height. As a result, the pulleys Pr1 and Pr2 are disposed at the same height. That is, the endless belt BLT between the pulleys Pr1 and Pr2 extends horizontally (see FIG. 13). The pulleys Pr1 and Pr1 are an example of a configuration corresponding to the "first pulley" of the present invention.

[0062] Here, as shown in FIG. 14, the inner surface IS of the endless belt BLT extending between the pulleys Pr1 and Pr2 faces the mounting surfaces 50a and 52a of the bases 50 and 52 at a predetermined distance. With this, when the endless belt BLT extending between the pulleys Pr1 and Pr2 is bent, the inner surface IS comes into contact with the mounting surfaces 50a and 52a, and the bending of the endless belt BLT can be suppressed. The inner surface IS is a surface that forms a pair with the outer surface OS of the endless belt BLT as a conveying surface for conveying the veneer 90. The outer surface OS corresponds to the "first surface" in the present invention, and the inner surface IS corresponds to the "second surface" in the present invention.

[0063] As described above, the upper surfaces 54a, 55a (surfaces facing the abutment parts 58, 59) of the circular saw abutment parts 54, 55 are flush with the mounting surfaces 50a, 52a, so that even if the endless belt BLT extending between the pulleys Pr1 and Pr2 is bent and the inner surface IS abuts against the mounting surfaces 50a, 52a, the outer surfaces OS, OS are positioned higher than the upper surfaces 54a, 55a, i.e., closer to the abutment parts 58, 59. In this embodiment, the pressing parts 56, 57, the bases 50, 52, the auxiliary conveyors 60, 62, and the circular saw abutment parts 54, 55 are positioned so that the following relational expression is established. This allows both ends 90a, 90b of the veneer 90 to be reliably pressed against the outer sides OS, OS of the endless belt BLT and the upper faces 54a, 55a of the circular saw contact parts 54, 55 by the contact parts 58, 59 of the pressing parts 56, 57.

[0064] (Formula 1) a1≦t (1) a2≦t (2) Here, a1 is the distance from the projection of the abutting parts 58, 59 of the pressing parts 56, 57 in the pressable state on a virtual projection plane when the scarf processing device 1 is viewed from one side in the conveying direction to the projection of the outer side surfaces OS, OS on the virtual projection plane, and t is the plate thickness of both ends 90a, 90b of the veneer 90 (see FIG. 14). Also, a2 is the distance from the projection of the abutting parts 58, 59 of the pressing parts 56, 57 in the pressable state on a virtual projection plane when the scarf processing device 1 is viewed from one side in the conveying direction to the projection of the upper surfaces 54a, 55a on the virtual projection plane. a1 corresponds to the "first distance" in the present invention, and a2 is an example of an embodiment corresponding to the "second distance" in the present invention. Also, the upper surface 91 is an example of an embodiment corresponding to the "fourth surface" in the present invention. The lower surface 93 (see FIG. 14) paired with the upper surface 91 is an example of an embodiment corresponding to the "third surface" in the present invention. Furthermore, the virtual projection surface is an example of an embodiment corresponding to the "first virtual projection surface" in the present invention.

[0065] The pulleys Pr3 and Pr4, like the pulleys Pr1 and Pr2, are fixed to the inner surfaces of the bases 50 and 52 (surfaces of the bases 50 and 52 facing the clamping bars 28 and 29) (see FIG. 11). With such an arrangement of the pulleys Pr1, Pr2, Pr3 and Pr4, the auxiliary conveyors 60 and 62 are disposed at positions adjacent to the circular saw contact portions 54 and 55 between the clamping bars 28 and 29 and the circular saw contact portions 54 and 55 when viewed from one side in the conveying direction TD, as shown in FIG.

[0066] The inner surface IS is wound around the pulleys Pr1, Pr2, and Pr4, and the outer surface OS is wound around the pulley Pr3. The friction coefficient between the outer surface OS and the pulley Pr3 is set to be greater than the friction coefficient between the inner surface IS and the pulley Pr3. This allows the rotational driving force of the pulley Pr3 to be transmitted reliably by the endless belts BLT and BLT. As a result, the conveying performance of both ends 90a and 90b of the veneer 90 in the conveying direction TD can be improved.

[0067] The control device 70 is configured as a microprocessor centered on a CPU, and is equipped with a ROM for storing processing programs, a RAM for temporarily storing data, an input / output port, and a communication port in addition to the CPU. A detection signal from a sensor for detecting the veneer 90 being carried from the carry-in conveyor 80 to the scarf processing device 1, and a detection signal from a sensor for detecting the clamping and release of the veneer 90 by the clamping bars 28 and 29 are input to the control device 70 via an input port. In addition, the control device 70 outputs a drive signal to the motors M1 and M2, a drive signal to the motors 40b and 41b, a drive signal to the air cylinders 24a, 24a, 24a, 24a, 26a, 26a, 26a, a drive signal to the air cylinders 56d and 57d, a drive signal to the motor M3, and the like via an output port. The control device 70 is an example of an embodiment corresponding to the "control unit" in the present invention.

[0068] Next, a description will be given of the operation of the scarf processing device 1 configured as described above. When the veneer 90 is carried from the carry-in conveyor 80 to a position where it can be held by the pair of clamping bars 28, 29, the CPU of the control device 70 drives the air cylinders 24a, 24a, 24a, 24a, 26a, 26a, 26a, 26a so that the veneer 90 is held by the pair of clamping bars 28, 29.

[0069] Next, the CPU of the control device 70 executes a process to drive the motors M1, M2 so that the clamped veneer 90 is transported to the discharge conveyor 82 at a speed V1 in the transport direction TD, and also drives the motors M3, M3 so that the endless belts BLT, BLT of the auxiliary conveyors 60, 62 rotate at a speed V2. Here, in this embodiment, the speed V2 is set to a speed slightly slower than the speed V1.

[0070] In addition, the CPU of the control device 70 drives the motors 40b, 41b so that the circular saws 40a, 41a rotate, and also controls the driving of the air cylinders 56d, 57d so that the pressing portions 56, 57 (contact portions 58, 59) can press both ends 90a, 90b of the veneer 90 toward the endless belts BLT, BLT and the circular saw contact portions 54, 55 (upper surfaces 54a, 55a) with a predetermined pressing force.

[0071] When both ends 90a, 90b of the veneer 90 transported in the transport direction TD at speed V1 reach the upstream ends of the endless belts BLT, BLT and are placed on the outer surfaces OS, OS of the endless belts BLT, BLT, both ends 90a, 90b of the veneer 90 are transported in the transport direction TD at speed V2 by the endless belts BLT, BLT. That is, the veneer 90 is transported in the transport direction TD at speed V1 by a pair of clamping bars 28, 29 near the center in the fiber direction FD, and both ends 90a, 90b are transported in the transport direction TD at speed V2 by the endless belts BLT, BLT.

[0072] Here, as shown in FIG. 15, consider a case where the end 90a of the conveyed veneer 90 has cracks Cr1 and Cr2 along the fiber direction FD. The crack Cr1 is a crack on the downstream side of the conveying direction TD, and the crack Cr2 is a crack on the upstream side of the conveying direction TD. The end 90a having the cracks Cr1 and Cr2 is conveyed in the conveying direction TD by the endless belts BLT and BLT at a speed V2, so that the frictional force acting on the end 90a in the opposite direction to the conveying direction TD due to the end 90a being pressed by the pressing parts 56 and 57 (contact parts 58 and 59) is reduced. This makes it possible to reduce the moment acting in the direction of widening the cracks Cr1 and Cr2 caused by the frictional force, or in the direction of excessively closing the cracks Cr1 and Cr2.

[0073] Since the speed V2 of the end 90a in the conveying direction TD is smaller than the speed V1 of the veneer 90 in the conveying direction TD by the pair of clamping bars 28, 29, an appropriate moment in the direction of closing the crack Cr1 caused by the above-mentioned frictional force acting in the opposite direction to the conveying direction TD acts on the veneer 90. This effectively prevents the generation of unscarfed portions caused by scarfing the crack Cr1 on the downstream side in the conveying direction TD in a widened state, or steps on the scarf surface caused by scarfing the crack Cr1 in an excessively closed state and then opening it back to its original state (opening) due to the elasticity of the veneer 90.

[0074] Then, when both ends 90a, 90b of the veneer 90 reach the contact position CpL, the CPU of the control device 70 executes a process to drive the motors M3, M3 so that the endless belts BLT, BLT of the auxiliary conveyors 60, 62 rotate at a speed V3. Here, in this embodiment, the speed V3 is set to a speed slightly faster than the speed V1.

[0075] In this way, after both ends 90a, 90b of the veneer 90 reach the contact position CpL, that is, after scarfing of both ends 90a, 90b is started, the speed V3 of the end 90a in the conveying direction TD is greater than the speed V1 of the veneer 90 in the conveying direction TD by the pair of clamping bars 28, 29, so that a moderate moment acts on the end 90a in the direction of closing the crack Cr2 caused by the frictional force acting in the same direction as the conveying direction TD. This effectively prevents the occurrence of unscarfed portions caused by scarfing in a state in which the crack Cr2 on the upstream side of the conveying direction TD is spread, or the occurrence of steps on the scarf surface caused by scarfing in an excessively closed state and then returning (opening) the crack Cr2 to its original state (opening) due to the elasticity of the veneer 90. Here, "after reaching" and "after starting" are concepts including "immediately after reaching" and "immediately after starting", as well as "after a predetermined time has passed since reaching" and "after starting".

[0076] In addition, if the dimension of the veneer 90 to be scarfed in the direction along the fiber direction FD (the dimension of the veneer 90 in the direction perpendicular to both the conveying direction TD and the thickness direction of the veneer 90) is increased, the protrusion of both ends 90a, 90b from the clamping bars 28, 29 increases. Therefore, in order to maintain the protrusion of both ends 90a, 90b at a predetermined protrusion amount required for scarfing, it becomes necessary to reposition (move) the support bases 8, 9 in a direction away from the clamping bars 28, 29. In this case, the distance from the support bases 8, 9 to the clamping bars 28, 29 increases, and the moment acting in the direction of widening the cracks Cr1, Cr2 or excessively closing the cracks Cr1, Cr2 increases, which is a moment according to the distance and the above-mentioned friction force. In order to reduce this moment, in the past, it was necessary to change the position of the clamping bars 28, 29 (change the structure of the clamping and conveying section 4) along with the change in the position of the support tables 8, 9 in order to reduce the distance from the support tables 8, 9 to the clamping bars 28, 29. However, in this embodiment, since the above-mentioned frictional force can be reduced, it is possible to deal with this by simply changing the position of the support tables 8, 9. This makes it possible to deal with differences in the dimensions of the veneer 90 while limiting the extent to which the scarf processing device 1 needs to be modified.

[0077] In addition, according to this embodiment, the both ends 90a, 90b that have reached the contact position CpL can be scarfed in a state where any twists, warps, or other irregularities that occur at the both ends 90a, 90b are corrected by the pressing parts 56, 57 (contact parts 58, 59), so that a good scarf surface can be ensured. Furthermore, the both ends 90a, 90b can be reliably pressed against the outer sides OS, OS of the endless belts BLT, BLT by the pressing parts 56, 57 (contact parts 58, 59), so that the both ends 90a, 90b can be reliably conveyed in the conveying direction TD. This makes it possible to more reliably prevent defects in the scarf surface, the occurrence of unscarfed parts, and the occurrence of steps on the scarf surface.

[0078] Of course, since the scarf surface is processed on both ends 90a, 90b while the veneer 90 is being transported, productivity can be improved compared to a structure in which the scarf surface is processed on both ends 90a, 90b while the transport of the veneer 90 is temporarily stopped.

[0079] In this embodiment, the surfaces of the abutting parts 58, 59 of the pressing parts 56, 57 facing the circular saw abutting parts 54, 55 and the endless belts BLT, BLT are inclined toward the tip side (left side of FIG. 9) and gradually approach the circular saw abutting parts 54, 55 and the endless belts BLT, BLT, but are not limited thereto. For example, the surfaces of the abutting parts 58, 59 facing the circular saw abutting parts 54, 55 and the endless belts BLT, BLT may be parallel to the mounting surfaces 50a, 52a of the bases 50, 52 (upper surfaces 54a, 55a of the circular saw abutting parts 54, 55), or the circular saw abutting parts 54, 55 may be spherical. In this case, the contact state between the abutting parts 58, 59 and both ends 90a, 90b is surface contact or point contact.

[0080] In the present embodiment and the above-described modified example, a predetermined distance is provided between the support surfaces 50a, 52a and the inner surfaces IS, IS of the endless belts BLT, BLT. However, the configuration may also be such that there is no predetermined distance, i.e., the inner surfaces IS, IS abut against the support surfaces 50a, 52a.

[0081] In this embodiment, one pressing portion 56, 57 is used to press both ends 90a, 90b of the veneer 90 toward the endless belts BLT, BLT and the circular saw contact portions 54, 55, but as shown in Fig. 16 which illustrates a modified pressing portion 156, 157, 256, 257, the pressing portion 156, 157 may press both ends 90a, 90b toward the circular saw contact portions 54, 55, and the pressing portion 256, 257 may press both ends 90a, 90b of the veneer 90 toward the endless belts BLT, BLT. In this case, the pressing portions 156, 157 and the pressing portions 256, 257 may be configured to be swung (rotated) by separate air cylinders (not shown). In addition, the pressing portions 156, 157, 256, 257, the bases 50, 52, the auxiliary conveyors 60, 62, and the circular saw contact portions 54, 55 may be disposed so that the following relational expression is satisfied.

[0082] (Formula 2) a3≦t (3) a4≦t (4) Here, a3 is the distance from the projection of the abutment parts 258, 259 of the pressing parts 256, 257 in the pressable state on the virtual projection plane when the scarf processing device 1 is viewed from one side in the conveying direction to the projection of the outer surfaces OS, OS on the virtual projection plane (see FIG. 16), and a4 is the distance from the projection of the abutment parts 158, 159 of the pressing parts 156, 157 in the pressable state on the virtual projection plane when the scarf processing device 1 is viewed from one side in the conveying direction to the projection of the upper surfaces 54a, 55a on the virtual projection plane (see FIG. 16). a3 corresponds to the "first distance" in the present invention, a4 corresponds to the "second distance" in the present invention, and the virtual projection plane is an example of an embodiment corresponding to the "first virtual projection plane" in the present invention.

[0083] Here, the contact portions 258, 259 correspond to the "first contact portion" in the present invention, the contact portions 158, 159 correspond to the "second contact portion" in the present invention, the upper surfaces 54a, 55a correspond to the "third contact portion" in the present invention, the upper surface 91 corresponds to the "fourth surface" in the present invention, the outer surfaces OS, OS correspond to the "first surface" in the present invention, and the inner surfaces IS, IS are an example of an embodiment corresponding to the "second surface" in the present invention. Note that the lower surface 93 (see FIG. 16) paired with the upper surface 91 is an example of an embodiment corresponding to the "third surface" in the present invention.

[0084] According to this configuration, the pressing parts 156, 157 (contact parts 158, 159) can reliably press the both ends 90a, 90b against the upper surfaces 54a, 55a of the circular saw contact parts 54, 55, so that the scarf processing can be performed on the both ends 90a, 90b in a stable state. In addition, the pressing parts 256, 257 (contact parts 258, 259) can reliably press the both ends 90a, 90b against the outer surfaces OS, OS of the endless belts BLT, BLT. This allows the both ends 90a, 90b to be reliably conveyed in the conveying direction TD. As a result, it is possible to more reliably prevent the scarf surface from being damaged, the scarf surface from being unscarfed, or the scarf surface from having steps.

[0085] In the present embodiment and the above-mentioned modified example, the auxiliary conveyors 60, 62 are used to transport both ends 90a, 90b of the veneer 90 in the transport direction TD, but this is not limited thereto. For example, as shown in modified scarf processing devices 300, 400, 500 illustrated in Figs. 17 to 19, the both ends 90a, 90b of the veneer 90 may be transported in the transport direction TD by disk transport mechanisms 360, 362, 460, 462, 560, 562 instead of the auxiliary conveyors 60, 62. The modified scarf processing devices 300, 400, 500 have a configuration in which the auxiliary conveyors 60, 62 of the scarf processing device 1 of the present embodiment are replaced with disk transport mechanisms 360, 362, 460, 462, 560, 562. Therefore, in order to avoid redundant explanations, the components of the scarf processing apparatus 300, 400, and 500 of the modified examples that correspond to the components of the scarf processing apparatus 1 of the present embodiment will be given the same symbols, and detailed explanations thereof will be omitted.

[0086] As shown in Figures 17 to 19, the disk conveying mechanisms 360, 362, 460, 462, 560, and 562 have basically the same configuration, except for the difference in the shape of the disks 361, 363, 461, 463, 561, and 563. That is, the disk conveying mechanisms 360, 362, 460, 462, 560, and 562 include two pulleys Pr5 and Pr6, the disks 361, 363, 461, 463, 561, and 563, a power transmission member PT such as a belt or chain wound around the two pulleys Pr5 and Pr6, and the pulleys Pr 6 and a motor M3 having a rotating shaft (not shown) connected to the disc conveying mechanism 360. The disc conveying mechanisms 360, 362, 460, 462, 560, and 562 correspond to the "first end conveying section" of the present invention, the discs 361, 363, 461, 463, 561, and 563 correspond to the "disc body" of the present invention, and the pulleys Pr5 and Pr6, the power transmission member PT, and the motor M3 are an example of an embodiment corresponding to the "drive section" of the present invention.

[0087] The pulleys Pr5 and Pr6 are rotatably supported on the bases 50 and 52 via the rotation shafts RSFT (see FIGS. 20 and 21) as shown in FIGS. 17 to 19. The discs 361, 363, 461, 463, 561, and 563 are, as shown in FIGS. 20 and 21, 5 The disks 361, 363, 461, 463, 561, and 563 are disposed between the bases 50 and 52 and the pulley Pr1. As shown in FIG. 17, the outer peripheral surfaces 361a and 363a of the disks 361 and 363 have no irregularities, but as shown in FIG. 18, the outer peripheral surfaces 461a, 463a, 561a, and 563a of the disks 461, 463, 561, and 563 have no irregularities. and Figure 19 As shown in Fig. 1, there are a plurality of projections and recesses UE in the circumferential direction. The projections and recesses UE of the outer peripheral surfaces 461a, 463a have sharp tips, while the projections and recesses UE of the outer peripheral surfaces 561a, 563a have flat tips. The outer circumferential surfaces 361a, 363a, 461a, 463a, 561a, and 563a are one example of a feature that corresponds to "a mounting portion" of this invention.

[0088] The pressing portions 56, 57, the bases 50, 52, the disc transport mechanisms 360, 362, 460, 462, 560, 562, and the circular saw contact portions 54, 55 are disposed so that the following relational expressions are established.

[0089] (Formula 3) a5≦t (5) a6≦t (6) Here, a5 is the distance from the projection of the abutment parts 58, 59 of the pressing parts 56, 57 in the pressable state on the virtual projection plane when the scarf processing device 1 is viewed from one side in the conveying direction to the projection of the outer peripheral surface 361a, 363a, 461a, 463a, 561a, 563a on the virtual projection plane, and t is the plate thickness of both ends 90a, 90b of the veneer 90 (see Fig. 20 and Fig. 21). Also, a6 is the distance from the projection of the abutment parts 58, 59 of the pressing parts 56, 57 in the pressable state on the virtual projection plane when the scarf processing device 1 is viewed from one side in the conveying direction to the projection of the upper surface 54a, 55a on the virtual projection plane. a5 corresponds to the "third distance" in the present invention, and a6 is an example of an embodiment corresponding to the "fourth distance" in the present invention. Also, the upper surface 91 is an example of an embodiment corresponding to the "sixth surface" in the present invention. The lower surface 93 (see Figs. 20 and 21) paired with the upper surface 91 is an example of an embodiment corresponding to the "fifth surface" in the present invention. Furthermore, the virtual projection surface is an example of an embodiment corresponding to the "first virtual projection surface" in the present invention. Furthermore, the portions of the contact portions 58 and 59 facing the outer peripheral surfaces 361a, 363a, 461a, 463a, 561a, and 563a and the upper surfaces 54a and 55a correspond to the "fourth contact portion" and the "fifth contact portion" in the present invention, respectively, and the upper surfaces 54a and 55a are an example of an embodiment corresponding to the "sixth contact portion" in the present invention.

[0090] In this embodiment, until both ends 90a, 90b of the veneer 90 reach the contact position CpL, the speed (V2) at which the endless belts BLT, BLT transport both ends 90a, 90b is slower than the speed (V1) at which the pair of clamping bars 28, 29 transport the veneer 90. After both ends 90a, 90b reach the contact position CpL, that is, after scarf processing of both ends 90a, 90b begins, the speed (V3) at which the endless belts BLT, BLT transport both ends 90a, 90b is faster than the speed (V1) at which the pair of clamping bars 28, 29 transport the veneer 90, but this is not limited to the above. For example, until both ends 90a, 90b of the veneer 90 reach the contact position CpL, the speed (V2) at which the endless belts BLT, BLT transport both ends 90a, 90b may be slower than the speed (V1) at which the pair of clamping bars 28, 29 transport the veneer 90. After both ends 90a, 90b reach the contact position CpL, that is, after scarf processing of both ends 90a, 90b begins, the speed (V1) at which the endless belts BLT, BLT transport both ends 90a, 90b may be the same as the speed (V1) at which the pair of clamping bars 28, 29 transport the veneer 90. Alternatively, until both ends 90a, 90b of the veneer 90 reach the contact position CpL, the speed (V1) at which the endless belts BLT, BLT transport both ends 90a, 90b may be the same as the speed (V1) at which the pair of clamping bars 28, 29 transports the veneer 90, and after both ends 90a, 90b reach the contact position CpL, that is, after scarf processing of both ends 90a, 90b is started, the speed (V3) at which the endless belts BLT, BLT transport both ends 90a, 90b may be made faster than the speed (V1) at which the pair of clamping bars 28, 29 transports the veneer 90. Furthermore, the speed (V1) at which the endless belts BLT, BLT transport both ends 90a, 90b may be consistently the same as the speed (V1) at which the pair of clamping bars 28, 29 transports the veneer 90.

[0091] This configuration also reduces the frictional force acting on both ends 90a, 90b in the direction opposite to the conveying direction TD due to the pressing of both ends 90a, 90b by the pressing parts 56, 57. This reduces the moment acting in the direction to widen the crack or tear caused by the frictional force described above or to close the crack or tear excessively when both ends 90a, 90b have a crack or tear. As a result, it is possible to effectively suppress defects on the scarf surface, the generation of unscarfed parts due to scarfing in a state where the crack or tear is widened, or the step on the scarf surface caused by scarfing in a state where the crack or tear is closed and then returning (opening) the crack or tear due to the elasticity of the veneer. As a result, even if there is a crack or tear at the first end, scarfing can be performed satisfactorily.

[0092] In the present embodiment and the modified example described above, the clamping and conveying section 4 is equipped with an upper clamping body 20 and a lower clamping body 22, and is configured to convey the veneer 90 in the conveying direction TD while the veneer 90 is clamped by the upper clamping body 20 and the lower clamping body 22, but this is not limited to the above. For example, as shown in Fig. 22, the modified clamping and conveying section 604 may be equipped with an upper conveyor 620 and a lower conveyor 622, and convey the veneer 90 in the conveying direction TD while it is held by the upper conveyor 620 and the lower conveyor 622, or as shown in Fig. 23, the modified clamping and conveying section 704 may be equipped with an upper clamping roll 720 and a lower clamping roll 722, and convey the veneer 90 in the conveying direction TD while it is held by the upper clamping roll 720 and the lower clamping roll 722. The clamping and conveying sections 604 and 704 are each an example of an embodiment corresponding to the "holding and conveying section" in this invention.

[0093] In the present embodiment and the modified example described above, the veneer 90 is conveyed in the conveying direction TD while being clamped, but this is not limiting. If the veneer 90 can be conveyed in the conveying direction TD while being held, the clamping conveying unit 4 may be replaced with, for example, a suction conveying unit that conveys the veneer 90 in the conveying direction TD while sucking the veneer 90, or a stippling conveying unit that conveys the veneer 90 in the conveying direction TD while being stippling the veneer 90.

[0094] In the present embodiment and the above-described modified example, even if the endless belt BLT extending between pulleys Pr1 and Pr2 is bent and the inner surface IS abuts against the mounting surfaces 50a, 52a, the outer surfaces OS, OS are positioned above the upper surfaces 54a, 55a, i.e., closer to the abutment portions 58, 59. However, this is not limited to the above configuration as long as the abutment portions 58, 59, 158, 159, 258, 259 of the pressing portions 56, 57, 156, 157, 256, 257 can reliably press both ends 90a, 90b of the veneer 90 against the outer surfaces OS, OS of the endless belt BLT and the upper surfaces 54a, 55a of the circular saw abutment portions 54, 55. For example, as shown in the support bases 8A, 9A, 808A, and 809A of the modified examples illustrated in FIGS. 24 and 25, the portions 58A1 and 59A1 of the contact portions 58A and 59A of the pressing portions 56A and 57A that face the outer surfaces OS and OS and the contact portions 258A and 259A of the pressing portions 256A and 257A face the upper surfaces 54a and 55a of the contact portions 58A and 59A of the pressing portions 56A and 57A, respectively. In the case where the endless belt BLT is configured to be disposed below the portions 58A2, 59A2 facing the abutting portions 158A, 159A of the pressing portions 156A, 157A, i.e., closer to the floor surface FL, the outer sides OS, OS may be disposed below the upper surfaces 54a, 55a, i.e., closer to the floor surface FL, when the endless belt BLT is bent and the inner side surface IS contacts the placement surfaces 50a, 52a. The portions 58A1, 59A1 of the contacting portions 58A, 59A facing the outer sides OS, OS correspond to the "first contact portion" and "fourth contact portion" of the present invention, and the portions 58A2, 59A2 of the contacting portions 58A, 59A facing the upper surfaces 54a, 55a are an example of an embodiment corresponding to the "second contact portion" and "fifth contact portion" of the present invention. Moreover, the pressing portions 156A and 157A correspond to the "second pressing portion" in the present invention, and the pressing portions 256A and 257A are an example of an embodiment corresponding to the "first pressing portion" in the present invention. Furthermore, the contact portions 158A and 159A correspond to the "second contact portion" in the present invention, and the contact portions 258A and 259A are an example of an embodiment corresponding to the "first contact portion" in the present invention.

[0095] In the present embodiment and the modified example described above, the circular saw contact portions 54, 55 are provided, but the circular saw contact portions 54, 55 may be omitted.

[0096] This embodiment shows an example of a form for carrying out the present invention. Therefore, the present invention is not limited to the configuration of this embodiment. The correspondence between each component of this embodiment and each component of the present invention is shown below. [Explanation of symbols]

[0097] 1 Scarf processing equipment (scarf processing equipment) 2 Frame (Frame) 4. Clamping and conveying section (holding and conveying section) 6 Processing Department (Processing Department) 7 Processing Department (Processing Department) 8 Support stand 9 Support stand 12a Upper beam 12b Upper beam 12c lower beam 12d lower beam 14a Base body 14b Base body 15a Legs 15b Legs 16a Upper beam 16b Upper beam 17a Lower beam 17b Lower beam 20 Upper clamping body 20a Main body 22 Lower clamping body 22a Main body 24a Air Cylinder 25 Rod 26a Air cylinder 27 Rod 28 Clamping bar (holding part) 29 Clamping bar (holding part) 30a vertical piece 30b horizontal piece 31 Guide section 32a vertical piece 32b horizontal piece 33 Guide section 34 Female thread body 35 Female thread body 36 Male thread rod 37 Male threaded rod 40a Circular saw (cutting blade) 40b Motor 41a Circular saw (cutting blade) 41b Motor 50 Base (support part) 50a Placement surface 52 Base (support part) 52a Placement surface 54 Circular saw contact part (support part) 54a Top surface (3rd contact part, 6th contact part) 55 Circular saw contact part (support part) 55a Top surface (3rd contact part, 6th contact part) 56 Pressing part (pressing part) 56a Lever part 56a1 1st piece 56a2 2nd piece 56b Connection 56c Pressing arm 56d Air cylinder 57 Pressing part (pressing part) 57a Lever part 57a1 1st piece 57a2 2nd piece 57b Connection 57c Pressing arm 57d Air cylinder 58 Contact part (first contact part, second contact part, fourth contact part, fifth contact part) 59 Contact part (first contact part, second contact part, fourth contact part, fifth contact part) 60 Auxiliary conveyor (first end conveying section, conveyor) 61a Support arm 61b Support arm 62 Auxiliary conveyor (first end conveyor, conveyor) 63a Support arm 63b Support arm 70 Control device (control unit) 80 Loading Conveyor 82 Discharge conveyor 90 Single board (single board) 90a End (1st end) 90b End (1st end) 91 Top surface (4th surface, 6th surface) 93 Bottom surface (3rd surface, 5th surface) 156 Pressing section (second pressing section) 157 Pressing section (second pressing section) 158 Contact part (second contact part) 159 Contact part (second contact part) 256 Pressing part (first pressing part) 257 Pressing part (first pressing part) 258 Contact part (1st contact part) 259 Contact part (1st contact part) 300 Scarf processing device (scarf processing device) 360 Disc conveying mechanism (first end conveying section) 361 Disc 361a Outer periphery (mounting Department , outer surface) 362 Disc conveying mechanism (first end conveying section) 363 Disc 363a Outer periphery (mounting Department , outer surface) 400 Scarf processing device (scarf processing device) 460 Disc conveying mechanism (first end conveying section) 461 Disc 461a Outer periphery (mounting Department , outer surface) 462 Disc conveying mechanism (first end conveying section) 463 Disc 463a Outer periphery (mounting Department , outer surface) 500 Scarf processing equipment (scarf processing equipment) 560 Disc conveying mechanism (first end conveying section) 561 Disc 561a Outer periphery (mounting Department , outer surface) 562 Disc conveying mechanism (first end conveying section) 563 Disc 563a Outer periphery (mounting Department , outer surface) 604 Clamping and conveying section (holding and conveying section) 620 Upper Conveyor 622 Lower Conveyor 704 Clamping and conveying section (holding and conveying section) 720 Upper clamp roll 722 Lower clamp roll 8A support stand 9A Support stand 56A Pressing part (pressing part) 57A Pressing part (pressing part) 58A Contact part 58A1: A portion of the contact portion 58A facing the outer surface OS, OS (first contact portion, fourth contact portion) 58A2: A portion of the contact portion 58A facing the upper surfaces 54a and 55a (a second contact portion, a fifth contact portion) 59A Contact part (1st contact part, 4th contact part) 59A1: A portion of the contact portion 59A facing the outer surface OS, OS (first contact portion, fourth contact portion) 59A2: A portion of the contact portion 59A facing the upper surfaces 54a and 55a (second contact portion, fifth contact portion) 156A Pressing part (second pressing part) 157A Pressing part (second pressing part) 158A Contact part (2nd contact part) 159A Contact part (second contact part) 256A Pressing part (first pressing part) 257A Pressing part (first pressing part) 258A Contact part (1st contact part) 259A Contact part (1st contact part) 808A Support stand 809A Support stand R1 Guide rail R2 Guide rail VHP Virtual Horizontal Plane M1 Motor M2 Motor M3 motor (motor, drive unit) RS Rotating Axis BR Bracket VL Virtual line segment P1 center point SS Swing Axis BLT endless belt (No End belt) IS inner surface (2nd surface) OS outer surface ( A placement portion, 1st page) CP point TD Transport direction (Transport direction) FD Fiber direction (fiber direction) CpL Contact position (Contact position) R Rod Br block letter PpL Pressing position (pressing position) Pr1 Pulley Pr2 pulley Pr3 pulley (first pulley) Pr4 pulley Pr5 Pulley (drive part) Pr6 Pulley (drive part) VP Virtual Plane (Virtual Plane) PT Power transmission member (drive part) UE unevenness RSFT Rotational Axis FL floor surface a1: Distance from the projection of the contact portions 58, 59 in the pressable state to the projection of the outer surfaces OS, OS (first distance) a2: Distance from the projection of the contact portions 58, 59 in the pressable state to the projection of the upper surfaces 54a, 55a (second distance) a3 Contact part in pressable state 258,259 From the projection of Outer side OS,OS Distance to the projection Away( 1st distance) a4: Distance from the projection of the contact parts 158, 159 in the pressable state to the projection of the upper surfaces 54a, 55a Away( 2nd distance) a5: Distance from the projection of the contact portions 58, 59 in the pressable state to the projection of the outer circumferential surfaces 361a, 363a, 461a, 463a, 561a, 563a (third distance) a6: Distance from the projection of the contact portions 58, 59 in the pressable state to the projection of the upper surfaces 54a, 55a (fourth distance) t Plate thickness (plate thickness)

Claims

1. A scarf processing device that processes a scarf surface on a first end portion of a veneer in a fiber direction while transporting the veneer, A frame, a holding and conveying section that has a holding section that can hold the veneer in a state where the first end protrudes and in a manner in which the protruding first end extends in a conveying direction of the veneer, the holding and conveying section being disposed on the frame so as to be movable in the conveying direction; a processing unit having a cutting blade capable of processing the scarf surface, the processing unit being disposed in the middle of the conveying path of the veneer such that a projection of the first end portion on a first virtual projection plane when viewed from one side of the conveying direction intersects with a projection of the cutting blade; a first end transport section having a mounting section capable of mounting the first end at least at a contact position where the first end and the cutting blade first come into contact with each other, and capable of transporting the first end in the transport direction at least at the contact position and a pressing position that is upstream of the contact position in the transport direction and adjacent to the contact position; a pressing portion, at least a part of which is disposed inside a projection area of ​​the placement portion on a second virtual projection plane when viewed from one side in a vertical direction, so as to be able to press the first end toward the placement portion at the pressing position; A scarf processing device comprising:

2. the first end transport portion is a conveyor having an endless belt as the placement portion, the endless belt has a first surface on which the first end portion can be placed and a second surface that is paired with the first surface, the first end portion has a third surface capable of contacting the first surface and a fourth surface paired with the third surface, the pressing portion has a first contact portion that is capable of contacting the fourth surface and is disposed opposite to the first surface, A first distance from a projection of the first contact portion of the pressing portion in a pressable state on the first virtual projection plane to a projection of the first surface on the first virtual projection plane is equal to or smaller than a plate thickness of the first end portion.

2. The scarf processing device according to claim 1.

3. a support portion disposed adjacent to the first end transport portion on the opposite side of the holding portion with respect to the first end transport portion when viewed from one side of the transport direction so as to be able to support the first end portion at least at the contact position; The pressing portion further includes a second contact portion capable of contacting the fourth surface, the support portion has a third contact portion that is capable of contacting the third surface and is disposed opposite to the second contact portion, A second distance from a projection of the second contact portion of the pressing portion on the first virtual projection plane to a projection of the third contact portion on the first virtual projection plane is equal to or smaller than a plate thickness of the first end portion.

3. The scarf processing device according to claim 2.

4. The conveyor includes a first pulley around which the endless belt is wound, and a motor connected to the first pulley so as to rotate the first pulley, The first pulley is capable of contacting the first surface, A coefficient of friction between the first pulley and the first surface is greater than a coefficient of friction between the first pulley and the second surface.

4. The scarf processing device according to claim 2 or 3.

5. The pressing portion includes a first pressing portion having the first contact portion and a second pressing portion having the second contact portion. A scarf processing device according to claim 3 or claim 4 dependent thereon.

6. a support portion disposed adjacent to the first end transport portion on the opposite side of the holding portion with respect to the first end transport portion when viewed from one side of the transport direction so as to be able to support the first end portion at least at the contact position; the first end transport unit includes a disk body having an outer circumferential surface as the placement unit, and a drive unit capable of rotating the disk body; the first end portion has a fifth surface capable of contacting the outer circumferential surface and a sixth surface paired with the fifth surface, the pressing portion has a fourth contact portion and a fifth contact portion capable of contacting the sixth surface, The support portion has a sixth contact portion capable of contacting the fifth surface, The fourth contact portion is disposed opposite to the outer circumferential surface, The fifth contact portion is disposed opposite to the support portion, a third distance from a projection of the fourth contact portion of the pressing portion in a pressable state on the first virtual projection plane to a projection of the outer circumferential surface on the first virtual projection plane is equal to or less than a plate thickness of the first end portion, A fourth distance from a projection of the fifth contact portion of the pressing portion on the first virtual projection plane to a projection of the sixth contact portion on the first virtual projection plane is equal to or smaller than a plate thickness of the first end portion.

2. The scarf processing device according to claim 1.

7. The scarf processing apparatus according to claim 6, wherein the disk body has an uneven outer circumferential surface.

8. A control unit that controls the holding and conveying unit and the first end conveying unit, The control unit determines a transport speed of the first end portion by the first end portion transport unit based on a moving speed of the holding transport unit in the transport direction, and controls the first end portion transport unit so that the first end portion is transported at the determined transport speed.

8. The scarf processing device according to claim 1,

9. The control unit controls the first end transport unit so that a transport speed of the first end transport unit is slower than a transport speed of the veneer by the holding transport unit until the first end reaches the contact position.

9. The scarf processing device according to claim 8.

10. The control unit controls the first end transport unit so that a transport speed of the first end by the first end transport unit is faster than a transport speed of the veneer by the holding transport unit after the first end reaches the contact position.

10. The scarf processing device according to claim 8 or 9.

11. The control unit controls the first end transport unit so that a transport speed of the first end by the first end transport unit is equal to a transport speed of the veneer by the holding transport unit.

9. The scarf processing device according to claim 8.

Images