JPH026607B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a side-splitting veneer and a method for manufacturing the same.

Conventionally, most of the so-called narrow-width veneers, which are irregular length veneers whose width in the direction perpendicular to the fibers is less than a certain dimension, are clipped with a clipper so that the ends parallel to the fibers are approximately perpendicular to the butt plane. The joining surface is formed by cutting and forming using a cutter jointer or by cutting and forming using a cutter jointer, and the joining surfaces of a plurality of small width veneers are brought close or close to each other, and a joining tape is formed. - Horizontally spliced (joined) using bonding materials such as wire rods and adhesives, and used for plywood production as horizontally spliced veneers.

The purpose of cross-splitting narrow-width veneers in this way is to facilitate handling and maintain precision during the plywood manufacturing process, so the joint strength needs to withstand the handling during the plywood manufacturing process, and the board surface It can be said that horizontally spliced veneers with a well-balanced bonding strength against movement in three directions: perpendicular to the fibers, perpendicular to the fibers, and in the fiber direction are ideal. Since the material is inserted into a processing device such as a machine, that is, most often moves in the fiber direction, the bonding strength in this direction is important.

However, since the splicing surface of horizontally spliced veneers by the conventional method described above is approximately perpendicular to the butt end surface (approximately parallel to the fibers), the joint strength in the fiber direction is determined solely by the damage strength of the joining member itself and the veneer. Since it depends on the adhesion force, the bonding strength in the fiber direction tends to increase or decrease in approximately proportion to the amount of bonding material used, and if the bonding material is saved, the bonding strength in the fiber direction will be insufficient. On the other hand, when many bonding materials are used, problems such as an increase in bonding costs and a complicated bonding process are caused. It has become an obstacle.

The present invention was developed in order to eliminate the drawbacks of the conventional horizontally spliced veneer, and effectively utilizes the strength of the veneer itself, which is strong in the fiber direction, to create a horizontally spliced veneer with strong joint strength in the fiber direction. We provide veneers and effective manufacturing methods,
We aim to improve handling, reduce joining costs, simplify the joining process, and thereby save labor in the veneer processing process.
It is intended to contribute to rationalization, and specifically, each of the joining surfaces of each narrow veneer is formed in a shape that hooks onto each other in either direction of the fibers, and the hooks are A horizontally spliced veneer has a characteristic configuration in that the mating parts are joined in a focused manner, and a characteristic configuration is that when forming such a spliced surface, it is cut with a cutting member. This is the manufacturing method.

A horizontally spliced veneer having such a characteristic configuration has a shape in which the spliced surfaces of each narrow veneer are hooked to each other in any direction in the fiber direction, and the hooked portions are Because they are intensively connected,
Even if the joining material is saved, the joining strength in the fiber direction is strong, and movement in that direction will not be hindered, resulting in improved handling, reduced joining costs, and simplified joining process. In addition, according to the manufacturing method having the above-mentioned characteristic structure, the joint surfaces are cut and formed, so it can be formed more quickly and easily than when cutting and forming. Both methods can contribute to labor saving and rationalization of the veneer processing process.

Hereinafter, the present invention will be described in more detail with reference to an example of implementation illustrated in the drawings.

As is clear from FIG. 1, the horizontally spliced veneer according to the present invention has a shape in which the joint surfaces of the adjacent narrow width veneers 2 and 3 are hooked to each other in either direction in the fiber direction. For example, as shown in the figure, the joint surface of one narrow-width veneer 3 has a reference mating surface 3a that is approximately perpendicular to the butt end surface, and two opposing surfaces that intersect with the mating surface 3a at an angle greater than the critical angle of friction. It consists of a hooking surface 3b, and has a substantially convex shape with respect to the plate surface,
In addition, the joining surface of the other narrow veneer 2 is connected to a reference joining surface 2a that is approximately perpendicular to the butt end surface, and the joining surface 2a is approximately perpendicular to the butt end surface.
consists of two opposing hooking surfaces 2b intersecting with respect to a at an angle greater than the critical angle of friction, each formed in a substantially concave shape to engage with the substantially convex joining surface of the narrow veneer 3, Hooking surfaces 2 that are brought close to each other or close to each other and still hook each other
At positions b and 3b, a joining member, for example, a wire 4 coated and impregnated with an adhesive and a small nodule-shaped adhesive 5 are fixed and joined as shown in the figure.

The horizontally spliced veneer 1 constructed as described above has a shape in which each of the spliced surfaces of the adjacent narrow-width veneers 2 and 3 is hooked to each other in either direction in the fiber direction, and the hooks are Since the mating parts are intensively joined by the joining member, there is no risk of the hook coming off, and the veneer itself, which is strong in the fiber direction, handles the reaction force against external force in that direction. The bonding strength is strong, there is no hindrance to movement in the direction of the fibers, and handling properties are significantly improved compared to conventional methods, and the reaction force in the direction that the bonding member has to bear is reduced or Since the bonding materials are removed, it is possible to save on bonding materials, reduce bonding costs and simplify the bonding process, and contribute to overall labor savings and streamlining of the veneer processing process. can.

In addition, the shape of the joining surface of each narrow width veneer can be any shape as long as it can be hooked onto the joining surface of adjacent narrow width veneers in any direction in the fiber direction. However, as in the above embodiment, it is formed by a reference mating surface that is substantially perpendicular to the butt end surface, and two opposing hook surfaces that intersect the mating surface at an angle greater than the critical angle of friction. If it is, it is preferable because the hooking in the direction of the fiber is reliable, and a combination of a substantially convex shape and a substantially concave shape,
It is desirable to make the shape as simple as possible, and to minimize the width of the unevenness in the direction perpendicular to the fibers, from the viewpoint of ease of formation and prevention of yield drop.

In addition, there are no particular restrictions on the type or usage of the joining member, and various joining tapes such as gummed tape and adhesive tape, various wire materials such as natural fiber thread, synthetic fiber thread, and fine metal wire, or wet-curing adhesives are used. Various adhesives such as adhesives, thermosetting adhesives, thermoplastic adhesives, etc., and various conventionally known bonding members can be applied. Insertion into the notch formed in the veneer, sewing/sewing
Various conventionally known methods such as hook stitching can be applied, and it is not necessarily necessary to join only the parts that are hooked to each other, for example, even if the vicinity thereof is joined, or other parts There is no problem even if the parts are joined in excess, as long as they are joined to a degree that can prevent the joint surfaces from coming off, or even more than that, but from the viewpoint of practicality and economy, the above embodiment A bonding mode that is relatively low cost and has excellent bonding strength in the direction perpendicular to the plate surface and in the direction orthogonal to the fibers is preferable, such as the bonding mode shown in FIG.

On the other hand, as is clear from FIG. 1, in the manufacturing method according to the present invention, the joining surfaces of the adjacent narrow veneers 2 and 3 are shaped so that they are hooked to each other in either direction of the fibers. When forming, use a cutting member such as a cutting blade 6 bent into a desired shape as shown in the figure to cut the ends parallel to the fibers of the narrow veneers 2 and 3 into the desired shape. The joint surfaces of the narrow veneers 2 and 3 formed in this manner are brought into close contact or close to close contact, and the wire rod 4 is inserted into a container 9 containing the adhesive 5, for example. By coating and impregnating the wire rod 4 with a small amount of adhesive, the wire rod outlet port of the container 9 is opened slightly larger at appropriate times, etc.
After applying a somewhat large amount of adhesive to a portion of the entire length of the wire rod 4 corresponding to the position of the joint surfaces of the narrow veneers 2 and 3, a roller-shaped pressure member 8 is applied.
is used to sequentially press and adhere the narrow width veneers 2 and 3 to the plate surfaces, thereby manufacturing the side-splitting veneer 1.

In the figure, numeral 7 denotes a blade holder that also serves as a conveyor, and cutting chips are not shown for convenience.

According to such a manufacturing method, since the joint surfaces are formed by cutting, it is effective because it can be formed quickly and easily compared to cutting and forming, etc., and it saves labor in the veneer processing process as a whole.・Can contribute to rationalization.

The cutting member may be of any shape as long as it can cut the joining surfaces of each narrow veneer into a shape that hooks onto each other in either direction of the fibers. However, as in the above embodiment, it is convenient to use a cutting blade formed by bending into a desired shape to cut the ends parallel to the fibers of adjacent narrow veneers in a contralateral manner; The cutting blade is also
The thinner the blade and the sharper the cutting edge, the better the adhesion of the joining surfaces, so it is preferable.

In addition, it is clearly stated that there are no particular restrictions on the specific shape of the splicing surface of each narrow veneer, and the type and usage of the joining members, and that the method is similar to that described in the explanation of the horizontally spliced veneer above. Although I will not explain it, I would like to add an additional point related to the above example: The intensive addition of adhesive to the position of the joining surfaces is as follows:
It is also possible to drip the adhesive using a separate adhesive dropper, and the container, pressurizing body, etc. that stores the adhesive can be heated, cooled, or released from the mold depending on the properties of the adhesive to be applied. It is appropriate to include and apply the following functions.

[Brief explanation of drawings]

The drawings are for explaining the present invention, and FIG. 1 is a schematic perspective view for explaining the side-splitting veneer according to the present invention and the manufacturing method according to the present invention. 1...Horizontal veneer, 2, 3...Narrow width veneer, 4...
... Wire rod, 5 ... Adhesive, 6 ... Cutting blade, 7 ... Blade receiver, 8 ... Pressure body, 9 ... Container for storing adhesive.

Claims (1)

[Scope of Claims] 1. The joint surfaces of adjacent narrow veneers are formed in such a shape that they are engaged with each other in any direction in the fiber direction, so that they are brought into close contact or close to close contact, and at least they are not engaged with each other. The parts that meet or the vicinity thereof are
A horizontally spliced veneer characterized by being joined using an appropriate joining member. 2. The joint surface of each narrow veneer is formed by a standard mating surface that is approximately perpendicular to the butt end surface, and two opposing hook surfaces that intersect the mating surface at an angle equal to or greater than the critical angle of friction. Claim 1 consisting of
Side-splitting veneer described in section. 3 The joining surface of one of the adjacent narrow veneers is formed in a substantially convex shape with respect to the board surface, and the joining surface of the other narrow width veneer is formed in a substantially concave shape that engages with the board surface. Horizontal spliced veneer described in Section 1 or Section 2. 4. Claims 1 or 2, or 4, in which a joining member is fixed and joined to at least one of the plate surface or the joint surface at or near the portion where the joint surfaces engage with each other. Side-splitting veneer described in Section 3. 5. The splicing surface of one narrow-width veneer to be horizontally spliced and the splicing surface of the other narrow-width veneer are shaped so that they hook into each other in either direction of the fibers.
The lateral surface is cut and formed by a cutting member so as to be brought into close contact or close to close contact, and is joined by attaching an appropriate joining member to at least the mutually hooked portions or the vicinity thereof. A method of manufacturing veneer. 6. A joint surface consisting of a standard mating surface that is approximately perpendicular to the butt end surface and two opposing hook surfaces that intersect the mating surface at an angle equal to or greater than the critical angle of friction is attached to both sides of adjacent narrow veneers. A method for manufacturing a side-splitting veneer according to claim 5, which comprises cutting and forming a veneer. 7. A patent claim in which a generally convex joining surface with respect to the board surface is cut into one adjacent narrow veneer, and a generally concave joining surface that engages the other narrow veneer is cut. A method for manufacturing a side-splitting veneer according to item 5 or 6. 8. Claims 5 or 6, which are formed by fixing and joining a joining member to at least one of the plate surfaces or the joining surfaces at or near the portion where the joining surfaces engage with each other, or Side-splitting veneer described in Section 7. 9. A method for manufacturing a horizontally spliced veneer according to claim 5 or 6, or 7 or 8, which uses a cutting blade bent into a desired shape as a cutting member.