JPH0437761B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention is a veneer veneer whose front and rear edges are cut into symmetrical bevels and an adhesive is applied to one side of the board. LVL is an intermediate product with a predetermined number of laminated layers by overlapping each other's slotted parts and shifting the overlapped parts in a step-like manner.
(laminated veneer lumber) or
This relates to a moving mechanism device used in the manufacturing process of laminated veneer material commonly known as LVB (laminated veneer board).

(b) Prior art A method and device for assembling this type of laminated veneer material according to the prior art is disclosed in, for example, Japanese Patent No. 982535 (Japanese Patent Publication No.
No. 14641) ``A device that sequentially abuts the tip of the veneer veneer being conveyed by a multi-row roller to stop its conveyance step by step,'' as disclosed in the Continuous Manufacturing Apparatus for Laminated Veneer Materials, etc. A large number of stopper groups that can be raised and lowered freely, and the veneer veneers that are stopped in stages by the stopper groups are dropped directly below each time by a lifting mechanism attached to the multi-row rollers, thereby joining the veneer veneers in the stacking process. The machine was designed to produce laminated veneer material with stepped sections.
The so-called butt joint type is a "device that uses a large number of fixed stoppers to stack a predetermined number of layers of intermediate products one batch at a fixed location."
Or, as disclosed in Patent Application Publication No. 59-500126, ``Laminated wood manufacturing method and manufacturing apparatus, etc.'' A single stop device that comes in contact with the wood veneer while moving and stops the conveyance step by step, and the wood veneer, which is stopped step by step by the single stop device, is pressed and held directly below each time by a gripping device. The so-called scarf joint method allows the production of laminated wood in which the joints of wood veneers are shifted in a step-like manner during the lamination process. There was a device that moved the wood veneers from one stopping point to another and continuously assembled them into an intermediate product with a predetermined number of layers.

(c) Problems to be Solved by the Invention As mentioned above, the method and device for assembling this type of veneer laminate material according to the prior art is limited to the former "fixed large group of stoppers placed at a predetermined assembly location". In the case of a device that assembles a number of layers of intermediate products one by one, the length of the assembled intermediate product is limited to the length of a single plywood veneer, making it difficult to carry out the subsequent heat-pressing process. As a result of the shortening of the delivery cycle of intermediate products to once every several tens of seconds, the proportion of idle time for pressurization and depressurization of hot press equipment such as high frequency press in the hot press process increases. However, there are serious difficulties in process operation, such as the difficulty of securing the desired heat-pressing time during the assembly time. In the case of a device that continuously moves the veneer from one stop to another to form a predetermined number of intermediate products, it is possible to create an intermediate product of at least 10 or more plies. Since the stopping device is moved point by point to follow the stopping location that changes every moment, not only does the ineffective time for movement increase and the efficiency of the system decreases, but also the fixed position stopping control over multiple points of the stopping device is difficult. The present invention eliminates serious functional problems such as the possibility that individual stopping errors may act synergistically to cause large overlapping deviations in places where the slotted cut is overlapped. In order to achieve this, "a large number of movable stopper groups or a stopper group that also serves as a lifting device are moved to the inlet side multiple times by the width of the cut interval of the plywood veneer for each load of the mechanism that has reached a predetermined number of layers. The machine moves to assemble multiple sets of intermediate products on a conveyor system in succession.

(d) Means for solving the problem The present invention provides the following as a means for eliminating the difficulties in process operation or function of the above-mentioned prior art method and device for assembling this type of veneer laminated material. A large number of stopper groups are arranged in series in multiple stages on the side; b. The stopper group is movable toward the carrying-in side by an interval equal to the cutting interval of the plywood veneer; and c. The stopper group and the moving device. This is a moving system device used in the manufacturing process of laminated veneer material, the main feature of which is to sequentially arrange multiple sets of intermediate products on a system conveyor using a transfer device.

(E) Embodiment As an example of the implementation of the moving mechanism device of the present invention is shown in FIGS. Process the contrasting slotted parts 2a and 2b with a tenoner or the like, and then apply adhesive to the upper surface of the board, except for the top layer, using a spretzer or the like, and then apply multiple rows of rollers. Transfer onto conveyor 3. The roller conveyor 3 is conveyed at an appropriate speed by a belt conveyor 4 or the like driven from the outer periphery to the top of a large number of stopper groups 7 installed in correspondence with a transfer device 6 installed on the side of the structured conveyor 5. It is composed of Further, between the rows of the roller conveyor 3, a group of stoppers 7, which also serves as a large number of lifting devices, are integrally installed so that overlapping points 8 of about 30 times the plate thickness t can be formed at a distance R apart from each other. Furthermore, the stopper group 7, which also serves as the lifting device, is configured to be able to reciprocate toward the carry-in side by a movable chain mechanism 9 suspended horizontally with the roller conveyor 3, and is usually located at an intermediate position of the stopper group 7, which also serves as the lifting device. When the device becomes the stopper exclusive mechanism 7a, from the first stopper to the bevel cutting interval of the veneer veneer 1, that is, from the entire length l of the veneer veneer 1 to the bevel cutting point 2 on one side.
A plurality of sets of intermediate products 10 are placed on the structured conveyor 5 by moving the entire product to the carrying-in side multiple times by the distance between the front and rear helical cuts (l-S) after subtracting the slope S of a and 2b. It is designed to work continuously.

The driving speed applied to the multi-row roller conveyor 3 from the outer periphery via the belt conveyor 4, etc. is such that the bevel cut portion 2a at the tip of the veneer veneer 1 collides with the stopper special mechanism 7a during the conveyance process. In order to reduce the impact force and reaction force at the time of transport, the speed can be reduced to about one-tenth of the normal transport speed immediately before the transport.
It is equipped with an automatic transmission device using a DC motor, etc.

Next, the effect will be explained. First, as shown in the first figure, a veneer veneer 1 is conveyed by a roller conveyor 3, and when it stops at a stopper 7a, it is then conveyed by a second veneer 1.
As shown in the figure, the stopper group 7 operates to lift the veneer veneer 1, and then, as shown in the third figure, the transfer device 6 enters between the stopper groups 7 and transfers the veneer veneer 1 below. Stop at a possible position. Next, the stopper group 7 descends, and the plywood veneer 1 is transferred to the transfer device 6.
Translated above. Then, when the stopper group 7 descends and returns to the initial position, the transfer device 6 advances over the roller conveyor 3 and onto the structured conveyor 5, and places the veneer at a predetermined position of the plurality of sets of intermediate products 10 on the structured conveyor 5. The veneer 1 is transferred and returned to its original position. Thereafter, in the same way, from the first stopping position, the bevel cutting interval of the veneer veneer 1, that is, the front and rear bevel cutting is calculated by subtracting the slope S of the bevel cutting points 2a and 2b on one side from the total length l of the veneer veneer 1. The stoppers 7 on the carry-out side are sequentially activated by the interval (l-S) to carry out the transfer operation, and the whole is moved to the carry-in side a plurality of times to place a plurality of sets of intermediate products 10 on the structured conveyor 5. It is a continuous process.

(F) Effects of the Invention As stated above, the present invention is based on the following: ``A large number of movable stopper groups or a stopper group that also serves as a lifting device are connected to a plywood veneer for each loading amount of the mechanism that has reached a predetermined number of layers. The machine is moved to the delivery side multiple times by the width of the cutting interval to stack multiple sets of intermediate products on the system conveyor in succession. A device that assembles a predetermined number of layers of intermediate products one by one at a fixed location, and a device that uses a single, movable stopping device to move the stopping points of each wood veneer from point to point. However, in the former case, the length of the assembled intermediate product was limited to the length of a single plywood veneer, which caused the problem in the latter stage. As a result of the shortening of the delivery cycle of intermediate products to the hot-pressing process to once every several tens of seconds, the ineffective time for pressurizing and depressurizing the hot-pressing equipment such as a high-frequency press in the hot-pressing process is reduced. In the latter case, the number of laminated layers of at least 10 or more plies increases, resulting in serious difficulties in process operation, such as making it difficult to secure the desired heat-pressing time during assembly time, and in the latter case, the Since the stopping device is moved point by point to track the stopping location of each wood veneer, which changes every moment, not only does the ineffective time for movement increase and the efficiency of the system decreases, but also the stopping device has multiple points. The fixed position stop control over the period of time has serious functional drawbacks, such as the possibility that individual stop errors may act synergistically, resulting in large overlap deviations in places where the crosscuts are overlapped. The present invention has been able to eliminate all problems, and when using the present invention, for example, 4 intermediate products of 9 ply and 1 m long plywood veneer are continuously conveyed on a conveyor system.
If assembled, the total length will be approximately 4 m, and the assembly time will be approximately 2 minutes and 30 seconds, and the same time can be set as the heat press time of a heat press machine with a process length of 4 m, such as a high frequency press in the subsequent heat press process. As a result, the ratio of ineffective time required for pressurization and depressurization of the device is also reduced, making it possible to safely secure the desired 2-minute heat-pressing time for a 9-ply intermediate product, and improve adhesive strength. For the first time, it became possible to efficiently produce products with excellent quality at a rate of 4 meters per cycle.

[Brief explanation of drawings]

The figure shows an example of implementation of the present invention,
Figures 1 to 4 are side views of the device showing the assembly operation in the order of steps, Figure 5 is a plan view of Figure 1, and Figure 6 is the same plan view when the position of assembly of the veneer veneer has been moved to the loading side. It is. 1...Plywood veneer, 2a, 2b...Beam cutting parts, 3...Roller conveyor, 4...Belt conveyor, 5...Structured conveyor, 6...Transfer device, 7
...Stopper group, 8...Overlapping location, 9...
Moving chain mechanism, 10...Intermediate product, l...Full length of veneer veneer, S...Slope of slotted part, l-
S...Lotus cutting interval.

Claims (1)

[Claims] 1 A roller conveyor that transports plywood veneers,
A group of stoppers, which also serve as a large number of lifting devices, are installed between the rows of the roller conveyor so as to be movable up and down;
A moving chain mechanism in which the roller conveyor and a stopper group that also serves as a lifting device are suspended so as to be movable to the carry-in side multiple times by the cutting interval of the plywood veneer for each load of the mechanism that reaches a predetermined number of layers. and a transfer device for transferring the veneer veneer lifted by the stopper group onto a side structure conveyor.