JPH042401B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention provides a system in which a veneer lace for cutting veneer or an unreeling machine for unwinding veneer and a veneer clipper for cutting to a fixed length are directly connected. It is used in the process of cutting veneer veneers, and is a method in which the veneers are cut to a standard size by a veneer clipper, and the veneers are alternately stacked in two during the conveyance process before being carried out. This invention relates to an improvement of a board stacking device.

(b) Prior art A conventional stacking device for fixed-length veneers that alternately stacks two sheets of veneer cut to a fixed length during the conveyance process and carries them out is known, for example, as a stacking device for stacking fixed-length veneers that has been cut to a fixed-length size. "Fixed process length method in which distance difference is set at an odd number times the standard length cutting dimension"
High-speed processing equipment for No. 1 plywood veneer, and
No. 33645 is a high-speed stacking machine for veneer veneers, which has a "variable process length method in which the conveyance distance is set at a distance that is an odd number multiple of the standard cutting size, and the conveyance distance can be changed arbitrarily." is Tokuko Akira
No. 60-33644, veneer veneer processing apparatus, etc.

(c) Problems that the invention aims to solve The "variable process length method" in which a distance difference of an odd number multiple of the dimension is provided and the transport distance can be changed arbitrarily, because the transport method was purely mechanical.
The former ``fixed process length method'' has the disadvantage of not being able to respond to changes in standard length cutting dimensions, and the latter ``variable process length method'' also has the disadvantage that it cannot respond to changes in standard length cutting dimensions compared to the former. I was able to make it compatible, but
For this reason, it is necessary to install a complicated zigzag-type movable adjustable telescopic conveyor device in the process to expand and contract the length of the conveyance process, and therefore, the high-speed conveyance process is arranged in a zigzag manner. Therefore, the brittle veneer veneer has disadvantages such as being a serious obstacle to transportation and easily damaging the material of the product.

(d) Means for Solving the Problems The present invention aims to eliminate the drawbacks of the fixed-length veneer stacking apparatuses of the prior art "fixed process length method" and "variable process length method." By adjusting the conveyance speed of the conveyor on one side to the desired deceleration side while keeping the process length fixed, it is possible to cut a fixed length veneer at the end of this type of process, where the cut dimensions always change. In other words, the present invention is configured such that (a) a veneer clipper is provided with two veneer clippers, edge length veneers, and regular length veneers at the rear stage of the veneer clipper; (b) A veneer distribution mechanism of a stab conveyance type or an adsorption conveyance type equipped with a controllable scraping member is installed; A two-tiered conveyor for fixed-length veneers was constructed, the other side being an overhead-type conveyor that was longer than the straight-type conveyor by approximately the fixed-length cutting dimension; c) 3 above-mentioned overhead type conveyors in series
The input/output shaft of a differential transmission is connected between the conveyor, which is divided into parts and whose length is approximately twice as long as the cut length of the intermediate part, and another conveyor, so that they are linked together. (d) A speed adjustment mechanism is attached to the control shaft of the differential transmission, and the speed adjustment mechanism is actuated to the desired amount of deceleration by a single plate detector installed on the intermediate conveyor. This is a device for stacking fixed length veneers in the process of cutting veneer veneers, which is comprised of the following.

(e) Embodiment To describe the present invention in detail with reference to an example of implementation shown in the drawings, firstly, the carrying-in conveyor 1 carries out the direct cutting process A from the veneer lace for cutting the veneer or the unreeling machine for rewinding the veneer at the previous stage. If the veneer veneer 2 brought in is a scrap veneer with no effective parts, it is cut to a fixed length by a cutter roller 3a, anvil roller 3b, etc. installed in the direct cutting process A. The veneer clipper 3 is passed free, and the veneer clipper 3 is directly dropped and separated by the first scraping member 5a installed in the veneer distribution mechanism 5 of the stab conveyance type or suction conveyance type installed at the end of the carry-out conveyor 4. In addition, if the veneer veneer 2 carried into the direct cutting process A is an end-length veneer that does not meet the standard cutting size, the second scraping member 5b installed in the veneer distribution mechanism 5 cuts the veneer directly. The products are distributed each time onto a transfer conveyor 6, and then sent to a later stage special processing process for edge length veneers, where they are cut into products of a certain width, which are then integrated and stacked to a predetermined width. Ru. Next, if the veneer veneer 2 carried into the direct cutting process A is a long veneer long enough to meet the standard cutting dimensions, it is cut to the prescribed standard cutting dimensions by the veneer clipper 3. The veneer distribution mechanism 5 receives the veneer. The fixed-length veneers delivered to the veneer distribution mechanism 5 are moved by a third scraping member 5c that is activated every other veneer to form a straight conveyance path on one side with the same starting and ending ends. a conveyor 7a, and a conveyor 7b on the other side formed in an overhead type.
The products are alternately distributed and delivered on a two-tiered conveyor 7 consisting of 7d and 7c. Therefore, the two fixed-length veneers that are delivered onto the straight-type lower conveyor 7c, which are normally delivered sequentially to the first half and the second half, are moved by a predetermined veneer that is entirely driven by the motor 8. Under the conveyance speed, the materials are conveyed one after another as they are to the overlapping location at the end, and are then delivered onto the overhead type upper conveyors 7b, 7d, and 7c, usually sequentially to the front, middle, and rear portions. The three fixed-length veneers to be delivered are operated at the same speed as the straight type conveyor 7a on the conveyor 7b in the front stage and the conveyor 7c in the rear stage, and continue normal conveyance operation, The conveyor 7d, which has a length at least twice as long as the standard cutting dimension of the section, has the conveyor 7a, conveyors 7b, 7c, and an input shaft 9a and an output shaft 9b inserted into the drive shaft of the conveyor 7d. Differential transmission 9
As a result, the differential deceleration conveyance operation is repeated for only one section in the middle. That is, when a fixed length veneer is delivered onto the intermediate conveyor 7d, it is transferred to the photoelectric switch,
It is detected by a single plate detector 10 such as a limit switch, and the detection signal is transmitted to the control shaft 9 of the differential transmission 9.
The output shaft 9b of the differential transmission 9 is automatically controlled to the deceleration side by transmitting the information to the speed adjustment mechanism 11 consisting of a servo motor, an electromagnetic clutch brake, etc. mounted on the intermediate conveyor 7d. The conveyance speed is reduced by a desired amount relative to the other conveyors 7a, 7b, and 7c, and at the overlapping location at the end of the straight type conveyor 7a, even-numbered regular length sheets just delivered to the straight type conveyor 7a are transferred. The timing at which the leading end of the board overlaps the leading end of the odd-numbered regular-length veneer that was previously delivered to the overhead conveyors 7b, 7d, and 7c is automatically adjusted, so that once the top and bottom are separated, Subsequently, two even-numbered veneers and two odd-numbered veneers of fixed length are precisely stacked one on top of the other and delivered onto the carry-out conveyor 12.

(F) Effects of the Invention As stated above, the present invention is capable of reducing the standard cutting size by adjusting the conveyance speed of one conveyor to the desired amount of deceleration while keeping the process length fixed. This system is designed to enable the overlapping of two fixed-length veneers and automatic electrical adjustment at the end of this type of process, which is always accompanied by changes in process length. This method has completely eliminated the disadvantages of the ``variable process length method'', such as the inability to adapt to changes in standard cutting dimensions, and the ``variable process length method'', such as material damage that is likely to occur during the folding and conveying process. However, according to the present invention, the conveyance process uses two conveyors: a straight type conveyor and an overhead type conveyor.
Since it has a simple structure of just stacking layers, there is no strong bending effect on the fixed-length veneer during conveyance, and the only means to respond to changes in the cut-to-length dimensions is to control the conveyance speed on a specific conveyor using electrical control. This is done by adjusting the speed of the process, so that accurate two-layer alignment work can be carried out safely, and significant results can be achieved in improving process efficiency and maintaining quality.

[Brief explanation of drawings]

The figure is a side view showing an example of implementation of the present invention. 3...Veneer clipper, 5a, 5b, 5c...
...Scraping member, 5... Single plate distribution mechanism, 7... Two-tier conveyor, 7a, 7b, 7c, 7d... Conveyor, 9... Differential transmission, 9a, 9b... Input/output shaft, 9c ... Control axis, 10 ... Single plate detector, 11
...Speed adjustment mechanism.

Claims (1)

[Claims] 1 A veneer veneer cutting process in which a veneer lace for cutting veneer or an unreeling machine for rewinding veneer and a veneer clipper for cutting to a fixed length are directly connected, and a scrap pile is installed after the veneer clipper. A veneer distribution mechanism of a stab conveyance type or an adsorption conveyance type equipped with a controllable scraping member for boards, edge length veneers, and fixed length veneers is installed, and a veneer distribution mechanism of a stick conveyance type or an adsorption conveyance type is installed at the rear stage of the veneer distribution mechanism. For fixed length veneer, one side is formed as a straight type conveyor and the other side is formed as an overhead type conveyor which is longer than the straight type conveyor by approximately the length cut length. In addition to constructing a two-tiered conveyor, the above-mentioned overhead type conveyor is divided into three parts in series, and between the conveyor and the other conveyor, the length of which is approximately twice or more than the standard cut size of the intermediate part. The input and output shafts of the differential transmission are connected to and linked together, and a speed adjustment mechanism is attached to the control shaft of the differential transmission, and the speed adjustment mechanism is installed on the conveyor in the intermediate section. 1. A device for stacking fixed length veneers in a veneer veneer cutting process, characterized in that a veneer detector is used to reduce speed by a desired amount.