JPS6155442B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for joining and reinforcing veneer veneers, and its purpose is to create protrusions by cutting into the surface of veneer veneers using a simple and rational method. By using wire rods such as pieces and threads, it is possible to efficiently and effectively join and reinforce veneer veneers, thereby contributing to the promotion of automation and speeding up the plywood manufacturing process, and especially in the initial stage. The aim is to improve productivity and achieve economical effects by making it possible to strengthen and join veneer veneers with high moisture content, where it is not easy to obtain the joining force of 100%, without being limited by the joining ability.

Now, regarding the joining and reinforcement of veneer veneer (hereinafter referred to as veneer) in the plywood manufacturing process,
Various methods are available, such as (1) a method using a so-called veneer sewing machine in which the veneer is sewn with thread, or a method in which a narrow veneer is knitted with thread (2) a method in which cut grooves are bored perpendicular to the fibers of the veneer and Methods for inserting threads into grooves (3) Methods for attaching threads and tape via adhesive, etc., have been proposed and adopted, either singly or in combination.

However, in method (1) above, there is a limit to processing capacity due to increased speed, and in method (2) above, the cut grooves are cut perpendicular to the fibers, which reduces the quality of the veneer. let Furthermore, method (3) above has advantages and disadvantages when considering the productivity of the plywood manufacturing process, such as the fact that there is a limit to the initial bonding ability due to moisture in the veneer, and it is difficult to obtain sufficient effects. is the actual situation.

The present invention was developed to rationally solve the technical and economical deficiencies of the prior art as described above.
A cut groove having at least one protruding piece is formed on each side of the area to be joined and reinforced between the surfaces of the veneers, and a wire such as a thread is laid over the protruding piece, and the wire is inserted into the cut groove. It is characterized in that the veneer veneers are joined and reinforced by being held in the grooves.

Examples of the present invention will be described as follows.

As illustrated in FIGS. 2 to 4, in the method of the present invention, first, incisions are made on both sides of the parts to be joined and reinforced on the plate surface of the veneer D, and the protruding pieces A1
A plurality of cut grooves A are formed. The protruding piece A
1 is formed into an appropriate shape, for example, approximately a scale shape, with its tip facing outward, as illustrated in FIG. 2, for example. Next, a wire rod B such as a thread is hung around each protruding piece A1 to construct the structure, and the wire rod B is inserted between the cut grooves A and sandwiched, and the veneer D is joined and reinforced. be.

Further, as illustrated in FIGS. 5 to 7, the protruding pieces A1 are arranged in two rows so as to be symmetrical in the direction orthogonal to the fiber direction of the veneer, and the two wire rods B are arranged in these two rows. If the veneer is hooked onto the protruding piece A1 in a zigzag pattern and installed, the reinforcement and bonding of the veneer will be further strengthened. FIG. 6 shows the case where the two wires B are twisted half a turn in the center, and FIG. 7 shows the case where they are twisted once.

Next, an example of an apparatus for carrying out the method of the present invention will be described.

That is, as illustrated in FIG. 1, a frame 1 is provided above a feed roll 2 that sends a veneer D cut by a rotary race or the like, and a pair of left and right rotating bodies 5, 5a are mounted on the frame 1, and their rotation The shafts 5b and 5c are rotatably supported so as to be tilted symmetrically, that is, in a V-shape.

For example, curved blades C and C1 are protruded radially and alternately on the left and right sides of the rotating bodies 5 and 5a, and the lowest blade in each of the rotating bodies 5 and 5a is
It abuts on the upper surface of the veneer D, and is arranged so that the protruding pieces A1 can be formed alternately on the left and right sides. The rotating shafts 5b, 5
Bevel gears 6 and 6a are attached to the proximal end of c so that they mesh with each other, so that the rotating bodies 5 and 5a rotate in synchronism.

On the other hand, both rotating bodies 5, 5a in the frame 1
A thread hooking arm 10, which has a guiding hole 12 at its tip and an oblong sliding hole 13 through the center, is attached to the upper center of the threading arm 10 so as to be rotatable around a fulcrum pin 11. A protruding pin 9 protruding from the back surface of the rotatable bevel gear 8 is engaged with the bevel gear 13 . Further, another bevel gear 7 is provided between the bevel gear 8 and the bevel gear 6a so that they are interlocked, and the arm 10 is oscillated left and right in synchronization with the rotating bodies 5 and 5a. Configure.

The method of the present invention will be explained as follows using the apparatus configured as described above.

That is, when the veneer D is conveyed by the feed roll 2, the lowest cutter C or C1 (the cutter C in the case of FIG. 1) on either the left or right rotating body moves the veneer D
The protruding piece A1 is formed by making contact with the upper surface of the veneer and cutting into the inside while rotating as the veneer is transported. At this time, the wire B is hooked on the back of the cutting tool C that made the cut, and the tip of the thread hooking arm 10 is already located on the back of the cutting tool C1 that will make the next cut.
The wire B is pulled inward as the rotating body rotates and enters the cut groove A. Since the wire B is always under an appropriate tension by the thread tensioning device 4, it is held in a wedged state between the cut groove A and the protruding piece A1 due to the tension angle and tension. By repeating this operation, the wire rods are successively installed, reinforcing and joining the veneers.

Note that in order to hook the wire onto the protruding piece and insert it into the cut groove without using the above-mentioned device, lightly press the vicinity of the tip of the protruding piece with an elastic material such as sponge rubber. It is sufficient to apply pressure and pull both ends of the wire from the tip side of the protruding piece toward the inside of the cut groove, in which case the elastic body will serve as a guide.

As mentioned above, in the wire erection method that is performed by synchronizing the rotating blade and the thread swing mechanism, the drive of the rotating blade is obtained directly through the veneer, so it is difficult to synchronize the conveying speed of the veneer. There is no problem with the installation of the thread at high speeds.

Furthermore, the apparatus for implementing the present invention is not limited to the above-mentioned rotary blade method, but a single swingable blade is tilted symmetrically, and the blades are rotated alternately as the veneer is transferred while being synchronized with the swinging arm. The wire rod may be constructed by applying In the present invention, as described above, a cut groove is formed and a wire rod is installed in the groove, but the cut groove may be formed on either the front or back surface of the veneer. There are no limitations on the arrangement or the method of constructing the wires. Furthermore, the shape of the protruding piece is not limited to the scale-like shape, and the cutter is not limited to the curved shape,
When joining, various adhesives, joining tapes, etc. may be used in combination.

As mentioned above, the reinforced and bonded veneer treated with protrusions and wire rods will not be damaged even if an external force is applied in the direction of unstable fibers during the next process of transportation and processing.
Since a tensile force is applied to the wire held between the protruding piece and the cut groove, the wedge between the protruding piece and the cut groove becomes even stronger, increasing the wedge effect and preventing the veneer from forming at the same time. The frictional force prevents the wire from shifting and maintains the positional relationship between the fibers of the veneer or between the veneers.

Note that processing the outer peripheral surface of the raw wood using the method of the present invention during rotary lace processing before cutting the veneer is intended to reinforce the veneer and maintain its connection, so it is naturally within the technical scope of this patent. It is included in

As mentioned above, the present invention simply and effectively solves the various defects of the conventional veneer. Regardless of the moisture content, thickness, and material of the veneer, the present invention can perform appropriately distributed incision processing and extremely inexpensive synthesis. Since reinforcing and bonding of veneers can be carried out at high speed using wire rods such as fibers, it is extremely easy to speed up and automate the veneer processing process, and economical effects can also be expected. This greatly contributes to improving the productivity of the plywood industry.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, FIG. 1 is an explanatory diagram illustrating an implementation apparatus for implementing the present invention, FIG. 2 is a plan view illustrating the state of a veneer reinforced and joined according to the present invention, and FIG. Figure 4 shows the X-
The X, YY cross-sectional views and FIGS. 5 to 7 are plan views of a veneer illustrating a state in which wire rods such as threads are compositely installed. A... Cut groove, A1... Protruding piece, B... Wire material such as thread,
C, C1... cutter formed into a curved shape, etc., D... veneer.

Claims (1)

[Claims] 1. Cutting grooves having at least one protruding piece are formed on both sides of the part where the surfaces of the veneer veneers are to be joined and reinforced, and a wire such as a thread is laid over the protruding piece. A method for joining and reinforcing veneer veneers, characterized in that the veneer veneers are joined and reinforced by sandwiching the wire between the cut grooves. 2. The cut grooves are formed in a zigzag shape in a direction perpendicular to the fiber direction of the veneer veneer, and the tips of the protruding pieces of these cut grooves are directed outward from each other. A method for joining and reinforcing a veneer veneer according to claim 1, wherein wire rods such as paired threads are installed in a zigzag shape. 3. The cut grooves are formed in two rows symmetrically in a direction perpendicular to the fiber direction of the veneer veneer, and the tips of the protruding pieces of these cut grooves are directed outward from each other. A method for joining and reinforcing a veneer veneer according to claim 1, wherein two wire rods such as threads are installed in a zigzag pattern on two rows of protruding pieces.