JPH08252805A - Working method of veneer - Google Patents

Abstract

PURPOSE: To provide the working method of a veneer, by which no problem on the manufacture of a board material even made of veneers developing twisting by drying in normal working method occurs. CONSTITUTION: Under the condition that a nose bar 3 is provided at the position, at which log 2 is compressed in the direction of the thickness of veneer 5 by 10% of the set veneer thickness, the veneer 5 is cut with a cutter 4 in order to form notched parts at the edge face of one of veneers 5 to be bonded to each other, resulting in providing first tongued and grooved part 5a, which is uneven in the direction of the thickness of veneer. Further, notched parts are formed at the edge face of the other veneer to be bonded to each other, resulting in providing second tongued and grooved part 5b having the shape engaging with that of the first tongued and grooved part 5a. Thus, one and the other veneers are bonded together by engaging with the tongued and grooved parts 5a and 5b with each other.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for processing a veneer used for manufacturing plywood, LVL, and other plate materials.

[0002]

2. Description of the Related Art Conventionally, plywood, LVL and other plate materials have been manufactured using a single plate obtained by cutting raw wood.

[0003]

In the production of these plate-like materials, the raw wood of the type in which the veneer is twisted due to drying causes problems in production such as the veneer not being able to be normally conveyed, and the plate material. Even if we were able to manufacture the product, it is not used due to the problem that these products will be twisted and the commercial value will be low, and it is said that the raw wood is said to be of good quality and will not twist even when dried. Only currently in use. However, the high-quality logs were expensive and most of them were cut down, and the amount that could be used in the future was limited. It is an object of the present invention to provide a method for processing a veneer that does not cause a problem in the production of the plate material even if the veneer is twisted due to drying in a normal processing method.

[0004]

In order to solve the above-mentioned problems, the present invention provides a pressure bar from the surface of a raw wood at a position where it is compressed by 10% or more of a set veneer thickness in the thickness direction. The veneer is cut, and then a notch is formed in the end face of one veneer to be joined with the veneer, and a first concavo-convex part having a concavo-convex shape in the thickness direction is provided and joined. A notch is formed on the end surface of the other power plate to be provided with a second uneven portion having a shape that meshes with the first uneven portion, and then the first uneven portion and the second uneven portion are engaged with each other to form the one And the method of processing a single plate for joining the other single plate.

[0005]

With the above-described veneer processing method, the veneer obtained by cutting has almost no back cracking, and even if a notch is formed, a part of the veneer is chipped at the end. Even if an attempt is made to twist a single veneer in a curved shape, the veneers of the joined veneers are different from each other and cancel each other out.

[0006]

Embodiments of the present invention are constructed as follows. As shown in FIG. 1, A is a well-known veneer, which is 20% of the set veneer pressure of 6 mm from the surface of the raw wood 2 to the raw wood 2 rotated by the spindles 1 and 1 and 2 mm.
A nose bar-3 is provided at the position of compression. Also, nose bar
The plane (not shown) for supporting 3 and the blade 4 is set so as to move toward the log 2 at a rate of 6 mm for one rotation of the spindles 1, 1. Immediately after the blade 4 of the veneer race A, although not shown, in order to switch the path of the veneer cut by the blade 4, a turning shaft is provided on the lower side in the veneer conveying direction and the tip is raised in the same direction. Toward the side, a plate-like rotating body is provided which can stand by at a position where the tip of the veneer A is turned up and turned down by a switch-changing operation by the driver. Although not shown in the figure, a conveyor for transporting the single plate from the position of the rotary shaft of the rotary body to the position of the reflection type photoelectric tube 12 described later is provided. Reference numerals 6 and 6'are provided on the lower side of the plate-shaped rotating body in the single-plate conveying direction, and are fixed to shafts 7 and 7'which are provided in the vertical direction and are constantly driven to rotate in the direction of the arrow.
It is a rotating cutter for forming notches continuous in the transport direction on both wood mouth surfaces of the veneer 5 that is cut by the veneer A and is transported in the direction orthogonal to the fibers. Cutter
When viewed in the rotational direction of 6 and 6 ', the shape of the tip is as shown in FIG. 2 (a) for the former and FIG. 2 (b) for the latter, and the position indicated by the dotted line is the single plate 5 Are carried by each one from the front of the wood
The cutters 6 and 6'are arranged so as to be cut at a depth of 5 mm. Since the cutter shown in FIG. 2 (b) has a complicated shape, two cutters divided at a portion indicated by a chain line may be fixed and used in an overlapping manner.

On the lower side of the cutters 6 and 6'in the direction of conveying the single plate, a sponge 8 impregnated with a wet-curing adhesive is formed on the shaft 7 at a position where it can be pressed against the surface of the single plate 5 to be conveyed. It is provided on a shaft 9 which is provided in parallel and is driven and rotatable. The sponge 8 has a cutting blade 10 on the lower side in the direction, and is controlled to cut the veneer 5 by rotating the veneer 5 every time the conveyance length of the veneer 5 becomes constant (for example, 3 shaku). A device 11 is provided. A reflection type photoelectric tube 12 for detecting a veneer is arranged on the lower side of the constant-length cutting device 11 in the veneer-conveying direction, and the pressing body 1 is provided at a position opposite to one side of the mouth of the veneer 5 being conveyed.
In order to move the pressing body 13 to the position where the veneer 5 is transferred to the conveyor 15 in the direction orthogonal to the veneer conveying direction by the veneer detection signal of the reflection type photoelectric tube 12 for detecting the presence or absence of the veneer. A cylinder 14 is connected to the pressing body 13.

As shown in FIG. 3 which is a partial side view of FIG. 1 and FIG. 1, the conveyor 15 has a drive shaft 15a and an idle shaft 1.
It is composed of a pair of upper and lower belts 15e which are hung on the rolls 15c and 15d fixed to 5b and constantly run at the speed V1 in the direction of the arrow. The conveyor 16 is arranged on the lower side of the conveyor 15 in the traveling direction. The conveyor 16 is provided with a drive shaft 15a via a bearing (not shown) and is driven by a rotatable roll (not shown), and a pair of upper and lower parts suspended on a roll 16b fixed to the drive shaft 16a. Belt 1
It consists of 6c. Further, a reflective photoelectric tube 17 for detecting the presence or absence of a single plate is provided at a position near the conveyor 15 of the conveyor 16,
While the photoelectric tube 17 is detecting the single plate, the belt 16 is constantly run in the direction of the arrow at a speed V2 which is smaller than the speed V1, and is stopped when the single plate is not detected. A controller (not shown) for providing an actuation signal is provided to the drive member (not shown) of 16a. Further, each material is determined so that the friction coefficient of the belt 15e with respect to the single plate is smaller than the friction coefficient of the belt 16c with respect to the single plate.

The drying device is provided as follows, for example. That is, as shown in FIG. 4, the rolls 17 and 17 'that are rotationally driven or stopped in the directions of the arrows at fixed positions in the vertical direction.
And a roll 1 rotatably supported by bearings 18 and 18 '.
The stainless steel belts 20 and 20 'are stretched around 9 and 19'. In addition, the bearings 18 and 18 'are cylinders 21 and 2 respectively.
By the operation of 1 ', the piston rod contracts and the belt 2
0, 20 'stretched position, and the piston rod extends and heat plate 23, which will be described later, is passed through belts 20, 20' to heat plate 23 '.
So that the belts 20 and 20 'can be reciprocated in the direction of the arrow so that the belts 20 and 20' are loosened.
Support members 22, 22 'for guiding the reciprocating movement of 8'are provided. At a fixed position on the back side of the belt 20 ′ at a position where the belts 20 and 20 ′ face each other, a heat plate 23 ′ heated to about 120 ° C. by passing steam through a passage formed inside the belt 20 ′ is provided. A plurality of heat plates 23 are arranged in the running direction, and on the other hand, on the back side of the belt 20, there are arranged heat plates 23 which are heated similarly to the respective heat plates 23 '. Further, the heat plate 23 is provided between a position where it can be pressed against the heat plate 23 'via the belts 20 and 20' by the operation of the cylinder 24 and a position where it does not contact the belt 20 when the belt 20 travels. It is provided so that it can reciprocate in the direction of the arrow, and the pressure of the cylinder-24 is 1 for a single plate.
Set so that a force of 2 kg per square cm is applied.

Rotationally driving or stopping the rolls 17 and 17 ',
The cylinders 21 and 24 are operated as follows. That is, the pistons 17 of the cylinders 21 and 24 are contracted and the belts 20 and 20 'are stretched, and the rolls 17 and 1 are rolled.
7'rotatably drive the belts 20 and 20 ',
When the traveling distance reaches a predetermined amount, the rolls 17 and 17 'are stopped, and then the piston rod of the cylinder 21 is extended to loosen the belts 20 and 20', and then the piston rod of the cylinder 24 is extended and the belts 20 and 20 'are extended. And press the hot plate 23 against the hot plate 23 'via the belts 20 and 20', and after the set time elapses, retract the piston rod of the cylinder-24 to the original position and then retract the piston rod of the cylinder-21. The belts 20 and 20 'are tensioned to rotate the rolls 17 and 17'. A controller (not shown) that outputs an operation signal to repeat the above operation is provided. It should be noted that the traveling distance of the belts 20 and 20 ′ per time and the heating plate 23 are set to the heating plate 23 ′ through the belts 20 and 20 ′.
The time of pressure contact with is properly set so that the water content of the veneer that is dried and comes out between the rolls 18 and 18 'is around 10%. Further, a carry-in conveyor 25 is provided at the entrance side of the rolls 17 and 17 ', and a carry-out conveyor 26 is provided at the exit side of the rolls 18 and 18', respectively, to rotate or stop the rolls 17 and 17 '. It is controlled by the controller to run or stop at the same time.

The embodiment of the present invention is configured as described above, and its operation will be described below. First, the process of joining the single plates with the apparatus shown in FIG. 1 will be described. The tip of the plate-shaped rotating body is made to stand by at a position where the tip end of the plate-like rotating body is raised and rotated by the driver's switch switching operation. As the tree species of the log 2, beech wood cut to a length of 1 shank is used.
And the plane which supports the cutting tool 4 is moved toward the log 2. Therefore, since the nose bar-3 is set as described above, the single plate 5 having a thickness of 6 mm is cut with almost no back cracking. Veneers with a narrow width in the cutting direction can be obtained until the log 2 becomes substantially cylindrical, but these veneers are guided downward by a plate-shaped rotating body. When the log 2 becomes almost cylindrical,
By the switch switching operation, the tip of the plate-shaped rotating body is made to stand by at the position where it is rotated downward. As a result, the path of the continuous strip-shaped veneer 5 is switched by the plate-shaped rotating body and is conveyed in the direction orthogonal to the fiber direction (hereinafter referred to as the first direction) as shown in FIG. Therefore, while the veneer 5 is being transported, first the both wood mouth surfaces are shaved by the cutters 6 and 6 ', respectively.
5 is a partially enlarged cross-sectional view taken along the alternate long and short dash line XX in FIG. 5A and shows the first concavo-convex portion 5a and the alternate long and short dash line YY.
5 is a partially enlarged sectional view of FIG.
It becomes the shape of the uneven portion 5b. Next, the second uneven portion 5b side of the conveyed single plate 5 is brought into pressure contact with the sponge 8, and the sponge 8 is driven to rotate, whereby the moisture-curable adhesive is continuously applied to the entire uneven portion 5b.

For the veneer 5 to be conveyed next, the standard length cutting device 11 makes one rotation every time the conveyance length becomes 3 shank, and the veneer 5 is cut by the cutting blade 10. And When the fixed-length veneer 5 ′ is further conveyed and the lower end in the first direction is detected by the photoelectric tube 12, the cylinder 14 is activated by the detection signal and the pressing body 13 moves the fixed-length veneer 5 ′ to It is pushed in a direction (hereinafter referred to as a second direction) orthogonal to the first direction indicated by the arrow, and is moved between the pair of upper and lower belts 15e. Therefore, the standard length veneer 5 ′ is conveyed in the second direction at a speed V1 while being sandwiched by the belt 15 from the front and back sides, and the standard length veneer 5 ′ is conveyed.
When the lower end of the second direction in the second direction is detected by the phototube 17, the pair of upper and lower belts 16c stopped by the detection signal travels at the speed V2, and the standard length veneer 5'transfers to the belt 16c in sequence. Similarly, it is conveyed while being sandwiched from the front and back.
When it is further conveyed and the end portion in the second direction of the standard length veneer 5'passes under the phototube 17 and the standard length veneer 5'is no longer detected, the pair of upper and lower belts 16c running due to the non-detection signal. Stops, and the standard length veneer 5 ′ also stops and waits in a state where the lower side end in the second direction is the first concave-convex portion 5a and the upper side end is the second concave-convex portion 5b.

Next, the subsequent fixed-length veneer 5 "cut by the cutting blade 10 is similarly moved between the pair of upper and lower belts 15e by the pressing body 13, and the fixed-length veneer 5" is moved at a high speed. V
It is transported by 1. Eventually, the first uneven portion 5a, which is the lower end in the second direction of the fixed-length veneer 5 ″, is detected by the photoelectric tube 17 and is the second uneven portion of the fixed-length veneer 5 ′ that is waiting in advance. The pair of upper and lower belts 16c travel at a speed V2 by the detection signal of the photoelectric tube 17, but the belt 15e travels at a speed V1 which is higher than V2 and the belt 15e as described above. The coefficient of friction of the belt 16c is smaller than the coefficient of friction of the belt 16c with respect to the veneer, so that the belt 15e and the standard length veneer 5 "slip and the maximum frictional force from the belt 15e to the standard length veneer 5" is increased. Acting,
By this force, the first uneven portion 5a of the standard-sized veneer 5 ″ is always pressed against the second uneven portion 5b of the standard-sized veneer 5 ′, and as a whole, V
It is transported at a speed of 2. Due to these pressing forces, the first concave-convex portion 5a of the standard length veneer 5 ″ and the second concave-convex portion 5b of the standard length veneer 5 ′ engage so as to fill the notches of both as shown in FIG. Due to this meshing, the tip end portion of the second concavo-convex portion 5b is sharp, while the tip end portion of the first concavo-convex portion 5a has an inclined surface toward the center in the thickness direction. Even if there is a slight deviation in the thickness direction, it is induced and good meshing is achieved.

The second concave-convex portion 5a, which is the end on the upper side in the second direction of the standard-size veneer 5 "joined to the standard-size veneer 5 ', passes under the photocell 17 and the standard-size veneer 5" is formed. Is no longer detected,
A pair of upper and lower belts 16 running by the non-detection signal
c is stopped, and the fixed-length veneer 5 ″ is stopped and waits in a state where the end on the first hand side is the second concave-convex portion 5b. By repeating the above operation, the blade 10 is cut to a constant length. The formed single plates are sequentially joined in the fiber direction. Further, in the joining of the first uneven portion 5a and the second uneven portion 5b,
The applied wet-curable adhesive is hardened by the moisture of the non-dried veneer so as to give an adhesive force, but it takes a long time to cure, so that the bonded state cannot be maintained by the adhesive at the beginning of bonding. However, since both the concave-convex portions 5a and 5b are formed as described above and due to elastic deformation of the veneer made of wood or the like, a frictional force that resists the force of disengagement is generated between the concave-convex portions 5a and 5b. The state is retained. The standard length veneer in which the bonded state is maintained as described above is
Every time the length in the entire fiber direction becomes constant, for example, 6 shank, it is cut by a cutting device such as a saw. In this way veneer
The veneer 5 cut with the slot A is sequentially conveyed in the cutting direction, and is successively subjected to formation of uneven portions, application of an adhesive, and cutting with a constant length. After cutting, the conveying direction is orthogonal to the above. Since the connections are changed depending on the direction, each process is performed efficiently and the productivity is good.

Next, a description will be given of the drying of the single plate (hereinafter referred to as the bonded single plate) which has been bonded and cut to have a constant length in the fiber direction as described above. In the drying device shown in FIG. 4, the fixed-size joining veneer P is placed on the carry-in conveyor 25. Since the traveling / stopping of the carry-in conveyor 25 is synchronized with the rotational driving / stopping of the rolls 17 and 17 ', as described above, the cylinder-
Roll 1 with piston rods 21 and 24 retracted
When 7 and 17 'are rotationally driven, the carry-in conveyor 25 also travels, and the fixed-size joining veneer P enters between the belts 20 and 20' and is conveyed, and when the set distance is conveyed, a signal from the controller indicates that -Le 17, 17 'and the carry-in conveyor 25 are stopped. Then, the piston rods of the cylinders 21 and 21 'move by the extension bearings 18 and 18' moving on the support member 22, so that the rolls 19 and 19 'move toward the rolls 17 and 17' and the belts 20 and 20 '. 'Is loose. Next, cylinders 21 and 2
The 1'piston rod extends and the hot plate 23 and the hot plate 23 'are brought into pressure contact with the fixed-size joining single plate P via the belts 20 and 20' for a set time. At this time, since the belts 20 and 20 'are made of stainless steel as described above, the heat of the hot plate 23 and the heat plate 23' is transferred to the standard length veneer P and the standard length veneer P is dried. When the rolls 17 and 17 ′ and the carry-in conveyor 25 are stopped, the fixed-size bonded veneer P to be dried next is placed on the carry-in conveyor 25. After the set time, a signal from the controller causes the piston rod of the cylinder -24 to contract, and then the piston rod of the cylinder -21 to contract to move the bearings 18 and 18 'on the support member 22 and tension the belts 20 and 20'. Then, the rolls 17 and 17 'are driven to rotate.
Then, when the belts 20 and 20 'travel for a set distance, the rolls 17 and 17' are stopped by a signal from the controller, and thereafter, the drying is performed by repeating the same operation, and the carry-out conveyor 26
The fixed-size bonded veneer P dried to the desired water content is sent out.

A standard-sized bonded single plate P obtained as described above
Even if the individual veneers constituting the standard-sized joined veneer P are twisted due to drying, they do not coincide with the twists of the veneers directly joined, but they cancel each other out, and they have the same size as a whole. It is flatter than a single plate that is not joined with. In addition, as described above, the standard length bonded single plate P
Since it is dried while pressing the hot plate on the front and back surfaces, it becomes flatter after drying. Therefore, with the standard length bonded veneer P obtained as described above, there is almost no manufacturing problem such that the veneer cannot be transported normally. Adhesive is applied to the front and back surfaces of the standard-sized bonded veneer P obtained as described above, and a veneer-cut veneer-cut veneer wood is used to obtain a veneer. When two veneers whose width in the direction orthogonal to the fibers is 3 shaku and whose grain is substantially the same are adhered to the front and back surfaces of the fixed-size joined veneer P, an LVL with almost no twist is manufactured. Also, if the raw wood bent in the fiber direction is
The yield of the veneer deteriorates when it is cut with a scale and cut with a veneer, but the veneer is cut by cutting the raw wood with the length in the fiber direction of about 1 or 2 as in the above example. If bonded to form a single plate having a fiber direction of 6 and a fiber orthogonal direction of 3, a yield of the single plate is significantly increased, which is effective.

The embodiment described above may be modified as follows. ☆ As for the uneven portion formed on the end surface of the veneer, as shown in FIGS. 7A and 7B, the shape of the tip as viewed in the rotation direction of the cutter is the same as that shown in FIG. Tip angle θ is 30
Using two cutters 30 with a certain degree, the direction perpendicular to the center line in the thickness direction of the veneer 31 indicated by the dashed line on the one side of the veneer 31 with respect to the veneer 31 with a thickness of 6 mm indicated by the dotted line Therefore, the cutout may be formed at a depth of 15 mm from the surface of the knives so that the overlapping position of the cutter 30 is about 1 mm below and the position of the other side of the surface of the other side is about 1 mm above. When the veneers 30 thus formed are engaged with each other, as shown in FIG. 8, the projections 31a on the front and back sides are slightly overlapped on the front and back sides of the mating veneer 31. Usually, if there are recesses on the front and back surfaces of the joined parts of the single plates joined due to the deviation during the joining of the single plates, it appears as a gap on the side surface of the product in which a plurality of these single plates and other plate materials are laminated and bonded, Product value will be low. However, if it is slightly wrapped as described above, the partially thickened part is deformed by the pressing pressure when bonding with other plate materials to become substantially flat, and even if it shifts at the time of joining, it does not fall within the wrapped range. As a result, it does not become a recess. ☆ The veneer joined in the example has a wood surface on one surface and a wood back on the other surface, but when it is cut with a veneer and the veneer dries, the wood surface bends with the wood surface outside. Since there is a tendency, if they are engaged so that the front and back of the tree are alternately located on the same surface, the tendency is canceled and the surface becomes flatter. ☆ Although the example of joining the veneer in the fiber direction is shown, the veneer may be joined in the direction orthogonal to the fiber direction, or a single veneer may be joined in the fiber direction. There may be a part joined in a direction orthogonal to the fiber direction. ☆ Wet curable adhesive was used as the adhesive to be applied to the uneven portions, but a thermosetting adhesive may be used and the adhesive may be hardened as it is dried by the heat when the veneer is dried. Of course, an adhesive may not be used as long as the engagement of the uneven portion is strong. ☆ In addition to the above, as a drying device for standard-size bonded veneers, one with the same structure as the hot press used when bonding multiple veneers that are usually laminated with thermosetting adhesive Good. ☆ It is recommended that the thickness of the veneer used to form and join the concavo-convex part should be 3 mm or more in consideration of the strength of the concavo-convex part. ☆ A nose bar was used as the pressure bar, but a roller bar may be used. ☆ Instead of a cutter, a circular saw may be used to form irregularities on a single plate. ☆ The veneer cut from the raw wood 2 and conveyed in the form of a strip may be cut into a certain length once, a notch may be formed with a cutter, and an adhesive may be applied.

[0018]

As described above, according to the present invention, a veneer obtained by cutting has almost no back cracking, and even if a cutout is formed, a part of the veneer is chipped at the end. , And a strong joining force can be stably obtained by meshing. Further, even if a single veneer is twisted in a curved shape, it is different from the twisted curve of the joined veneers and thus cancels each other out, resulting in a substantially flat surface as a whole.

[Brief description of drawings]

FIG. 1 is an explanatory plan view of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a tip portion of a cutter.

FIG. 3 is a partial side view of FIG.

FIG. 4 is a side view illustrating a drying device.

5 is a partially enlarged cross-sectional view taken along line XX and line YY in FIG.

FIG. 6 is an explanatory view of a meshed state of the uneven portions of the single plate.

FIG. 7 is an explanatory diagram of a modification example of the tip portion of the cutter.

FIG. 8 is an explanatory diagram of a meshed state of the concave and convex portions of the single plate.

[Explanation of symbols]

2 ·· Log, 3 ·· Nose bar, 6, 6 ′ · Cutter, 8 ·· Sponge impregnated with a wet-curing adhesive, 11
..Constant length cutting devices, 15, 16 ... Conveyors, 20, 2
0 '... Belt, 23, 23' ... Hot plate.

Claims (8)

[Claims] 1. A pressure bar is provided at a position where it compresses 10% or more of a set veneer in the thickness direction from the surface of raw wood, the veneer is cut by a blade, and then the veneer is to be joined. Forming a notch on one end face of one of the veneers to provide a first concavo-convex portion that is uneven in the thickness direction, and forming a notch on the end face of the other veneer to be joined, A method for processing a veneer in which a second uneven portion having a shape that engages with the first uneven portion is provided, and then the first uneven portion and the second uneven portion are engaged with each other to join the one and the other veneer. 2. A pressure bar is provided at a position where it compresses 10% or more of a set veneer thickness from the surface of the raw wood in the thickness direction, the veneer is cut with a blade, and then the veneer is to be joined. Forming a notch on one end face of one of the veneers to provide a first concavo-convex portion that is uneven in the thickness direction, and forming a notch on the end face of the other veneer to be joined, A single plate for bonding the first and second single plates by providing a second uneven part having a shape that meshes with the first uneven part, and then engaging the first uneven part and the second uneven part with an adhesive agent to join the one and the other single plates. Processing method. 3. A pressure bar should be provided at a position that compresses 10% or more of the set veneer thickness from the surface of the raw wood in the thickness direction, the veneer should be cut with a blade, and then the veneer should be joined. Forming a notch on one end face of one of the veneers to provide a first concavo-convex portion that is uneven in the thickness direction, and forming a notch on the end face of the other veneer to be joined, A second concave-convex portion having a shape that meshes with the first concave-convex portion is provided, and then the first concave-convex portion and the second concave-convex portion are engaged with each other with an adhesive to bond the one and the other single plates, and Is a method for processing a single plate obtained by heating and drying the bonded single plate. 4. A pressure bar should be provided at a position where it compresses 10% or more of the set veneer thickness from the surface of the raw wood in the thickness direction, the veneer should be cut by a blade, and then the veneer should be joined. Forming a notch on one end face of one of the veneers to provide a first concavo-convex portion that is uneven in the thickness direction, and forming a notch on the end face of the other veneer to be joined, A second concave-convex portion having a shape that meshes with the first concave-convex portion is provided, and then the first concave-convex portion and the second concave-convex portion are engaged with each other with an adhesive to bond the one and the other single plates, and Is a method for processing a veneer, in which a heating element is pressed against the bonded veneers and dried. 5. The method for processing a veneer according to claim 1, 2, 3 or 4, wherein the veneer cut from the raw wood has a thickness of 3 mm or more. 6. The method according to claim 1, wherein when joined, the wood surfaces of one veneer and the wood back of the other veneer are positioned so as to be positioned on the same surface. Veneer processing method. 7. When three or more veneers are joined together, the veneers of the veneers and the underside of the veneers are interlocked so that they are alternately positioned on the same surface. Alternatively, the method for processing a veneer according to item 6. 8. A veneer which is cut in a veneer provided at a position where the pressure bar is compressed by 10% or more of the set veneer thickness in the thickness direction from the surface of the raw wood and is conveyed in the direction orthogonal to the fiber. A notch is formed on both wood mouth surfaces to form unevenness in the thickness direction and to form an intermeshing portion that meshes with each other, and an adhesive is applied to at least one of the unevennesses of the same veneer that is also conveyed, and then the veneer is After cutting into a constant length veneer by cutting it to a constant length, the standard length veneer is moved in a direction orthogonal to the transport direction, and then the preceding and the preceding irregular length part in the moving direction of the standard length veneer is uneven. A method for processing a veneer in which the following irregular size veneer is meshed with an uneven portion on the lower side end in the moving direction.