JPS62169601A - Extrusion braking method and device on end-edge butting in veneer transverse barker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (And Industrial Application Fields The present invention relates to cross-spliced veneers used in the field of plywood manufacturing,
In particular, the trailing veneer veneer, which is made by applying an adhesive such as molten hot melt resin to the front edge of a narrow veneer veneer, collides with the trailing edge of the preceding veneer veneer and is pushed backwards as one unit. During edge colliding in an extrusion-type veneer cross-seaming machine configured to obtain cross-seamed veneers in a row by pasting adhesive threads impregnated with molten hot-melt resin, etc. on the surface. This invention relates to improvements in extrusion braking methods and devices.

B. Prior Art As a prior art similar to the extrusion braking method and device at the time of edge abutment in this type of extrusion type veneer cross-cutting machine, for example, Patent No. 1.057゜528 (Japanese Patent Publication No. 475
No. 62) Continuous cutting and cutting and joining equipment for veneer and JP-A-59-54
No. 504, forcible removal and placement of veneer veneer horizontal stripping machines, etc., and all of these conventional devices have a small or medium veneer veneer coated with an adhesive such as molten hot melt resin on the front edge of the veneer veneer. A lower conveyor is suspended horizontally so that it can be carried in from the process, an upper conveyor is parallel to the upper conveyor, and a pressing force is applied to the following plywood veneer installed inside the front half of the upper conveyor so that it can be pressed freely. a first movable shoe consisting of a rail member and the like, and a braking rail member that applies a slight braking force due to sliding friction to the preceding and following plywood veneers slidably installed between the rear rows of the upper stage conveyor; The extrusion braking method and apparatus at the time of edge abutment in this type of extrusion type veneer cross-cutting machine were constructed by the second movable shoe consisting of the above-mentioned extrusion shoe and the like.

Furthermore, as a responsive unloading device for this type of extrusion type veneer horizontal stripping machine, for example, Japanese Patent Application Laid-Open No. 60-83801,
There is Japanese Patent Application Laid-Open No. 60-129203, etc., but all of them are equipped with a torque motor and a pressing roller independently.

V″> Problems to be Solved by the Invention As mentioned above, the prior art method and device have a second
Only a small amount of braking force due to the sliding friction of the movable shoe acts on the surfaces of the preceding and following plywood veneers, so if that braking force is lost too much, the collision force when the edges collide will become excessive and cause damage to the material. Even if this causes buckling or jamming, and even if this is within the range of a certain amount of braking force that is considered appropriate for the edge abutment movement of the preceding and following veneer veneers, it is necessary to stop each time at a predetermined edge abutment location. Since the upper and lower conveyors are always rotating on the surface of the succeeding veneer veneer, the slight pushing action caused by the sliding friction causes the conveyor to stop at the edge abutting locations each time, and the succeeding veneer veneer is , the trailing edge of the leading veneer veneer moved unstably, and when the edges collided with the succeeding veneer veneer the next time, a gap was formed between the mutual abutting parts, resulting in poor bonding. In order to alleviate the problems caused by sliding friction and the problems caused by sliding friction, the conventional equipment was equipped with a torque motor and a pressure roller, which were all equipped independently. Therefore, in order to eliminate the drawbacks such as unstable braking position fluctuations, we created a braking rail member that directly acts on the veneer surface separately from the braking rail member that uses sliding friction, which is composed of these second movable shoes. The present invention attempts to solve the problems of the conventional device by installing a controllable single-plate brake shoe and a torque motor in association with a pressure roller that rotates at a speed of 5-.

Means for Solving the Problems The present invention, unlike conventional methods and devices, relies only on the braking force due to the sliding friction of the second movable shoe consisting of a braking rail member, etc., and on the next pushing force of the succeeding veneer veneer. No cow,
The sliding frictional braking force of the second movable shoe and the feeding rotational force of the pressure roll generated by the rotation of the torque motor are used to operate the extrusion operation when the edges of the leading veneer veneer and the following veneer veneer meet. , the veneer surface is configured to be able to forcibly brake the veneer surface by activating an independently installed veneer brake shoe each time the edge abutting extrusion operation is suspended,
That is, the structure of the method of the present invention is as follows: 1-a) A forced braking force is applied to the surface of the veneer by an independent veneer brake shoe during the pause period of the extrusion operation when the edges of the leading veneer veneer and the following veneer veneer collide. That's what I did.

1-b) At the time of operation of the edge abutting operation of the preceding veneer veneer and the following veneer veneer, the forceful braking force applied to the veneer surface by the veneer brake shoe is stopped, and the torque motor is The rotational force of the press roll due to its rotation is applied.

This is an extrusion braking method at the time of edge abutment in a veneer horizontal stripping machine.

Further, the configuration of the device of the present invention is as follows: 2-a) A single plate brake shoe equipped with an elevating mechanism such as an air cylinder and a pressing roller rotated by a torque motor are installed between the rows of the second movable shoes.

2-b) A single plate detector such as a photoelectric switch is installed immediately in front of the second movable shoe so as to be able to control the raising and lowering of the lifting mechanism.

This is an extrusion braking device during edge abutment in a veneer side stripping machine.

(e) Production 71 Regarding the method invention of the present invention, attached Section 3A.

To explain its operation according to the operating mode shown in Fig. 3B, first, in Fig. 3A, it is made of a small to medium-sized plywood veneer with adhesive 1 such as molten hot melt resin applied to the front edge brought in from the previous stage process. The succeeding plywood veneer 2 is connected to a lower conveyor 4 suspended horizontally on a fixed shoe 3;
The first movable shoe 6, which is pressably installed in the front half of the upper conveyor 5 opposite to A second movable shoe 7 is installed between the rows of the upper conveyor 5 so as to bring the edges into contact with each other and apply a desired side pressure to the mutual edge. It is configured to be powered.

Furthermore, prior to the edge abutment extrusion operation, if the succeeding veneer veneer 2 has not yet arrived directly below the veneer detector 9 such as a photoelectric switch installed just before the second movable shoe 7, , the first elevating mechanism 108 such as an air cylinder connected to the single plate detector 9 remains activated in the upward direction, and the second elevating mechanism 10b remains activated in the downward direction. A veneer brake shoe 11 connected to the second elevating mechanism 10a forcibly brakes the plate surface near the rear edge of the preceding veneer 8, and a torque motor 19 connected to the second elevating mechanism 10b Rotating pressure roller 2
0 floats up from the plate surface and continues to idle, and is constructed so as to completely suppress even the slight moving force caused by the sliding friction of the upper and lower conveyors 5 and 4. Next, 3rd B
The figure shows a state in which the conveyance of the succeeding veneer veneer 2 has progressed and its leading edge collides with the trailing edge of the preceding veneer veneer 8 which has been stopped at the edge abutting location, At that time, the veneer detector 9 detects the leading edge of the succeeding veneer veneer 2, so the first elevating mechanism 108 connected thereto is moved upward, and the second elevating mechanism 10b is moved downward. When activated, the pressure roll 20 equipped with the brake shoe 11 and the torque motor 19 is operated in the direction of the arrow to release the forced braking force on the surface of the veneer, and to apply the rotational force to the veneer. He then started his run-up. Therefore, the collision force during braking that acts on the trailing veneer veneer 2 and the leading veneer veneer 8 is due to the initial inertia due to the run-up action of the press roll 20, which overcomes the slight braking force caused by the sliding friction of the second movable shoe 7. Since the collision force can be eliminated, the self-weight and pressing force of the second movable shoe 7 are adjusted so that only the sliding friction effect is reduced to the extent that the second movable shoe 7 is lightly pressed down from above, and the adhesive 1 applied to the edge can be easily removed. It is configured to limit the lateral pressure necessary for edge adhesion. Furthermore, when the trailing edge of the succeeding veneer veneer 2 passes directly under the veneer detector 9 installed immediately in front of the second movable shoe 7, the trailing edge detection signal causes the first elevating and lowering to occur again. The mechanism 108 is on the lowering side,
Further, since the second elevating mechanism 10b is activated to the upward side, the single plate brake shoe 11 and the pressing roller 20
descends and rises as shown by the arrow, and forcibly brakes the plate surface near the rear edge of the preceding veneer veneer 8 again to stop this, and the pressing roller 20 continues to idle and presses the next succeeding veneer veneer 2.
It is configured to wait for the arrival of

〜Example The structure of the device of the present invention will be explained with reference to FIGS. 1 and 2, which illustrate the invention. Both edges of the veneer are cut to shape by a veneer clipper, a spot nozzle, etc. provided in the previous step, and a cut is made to the front edge of the veneer. A subsequent veneer veneer 2 consisting of a small to medium veneer veneer coated with an adhesive 1 such as a molten hot-melt resin is placed on a fixed shoe 3 made of a rail member or the like by a chain conveyor or the like so that it can be freely carried into the horizontal stripping process. Lower conveyor 4
is suspended horizontally. Above the lower conveyor 4, an upper conveyor 5 consisting of a chain conveyor, an arm, etc. is opposed in parallel to the lower conveyor 4, and a rail is installed in the front half of the upper conveyor 5 to freely press and convey the succeeding plywood veneer 2 in the carrying process. A first movable shoe 6 made of a member, etc. is installed inside, and between the rows in the rear half of the upper stage conveyor 5, a slight braking force is applied by sliding friction to the preceding veneer veneer 8 during the extrusion process. In order to apply the desired lateral pressure to the mutual edges,
A second movable shoe 7 made of a brake rail member or the like is installed. Furthermore, in addition to applying a slight braking force to the preceding veneer veneer 8 during the extrusion process by the second movable shoes 7, an independent forced braking force is applied between the rows of the second movable shoes 7. A single plate brake shoe 11 equipped with a first elevating mechanism 108 such as an air cylinder is installed independently so as to be freely attachable to the plate surface. Next, a pressure roller 20 equipped with a second elevating mechanism 10b such as an air cylinder is installed so as to be movable up and down, facing the wet roller 16 that adheres the adhesive thread 15 to the surface of the preceding veneer veneer 8. At the same time, a torque motor 19 is mounted on the pressing roller 20 to apply a rotational force to the plate surface of the preceding veneer veneer 8, so that a run-up can be started before the edges collide. On the other hand, a veneer detector 9 consisting of a photoelectric switch or the like is installed just before the second movable shoe 7, and when it detects the leading edge of the succeeding veneer veneer 2 being conveyed directly below, a leading edge detection signal is sent. is immediately transmitted to the first and second elevating mechanisms 10a and 10b to move them upward and downward, so that the forced braking action of the veneer brake shoe 11 on the surface of the preceding veneer veneer 8 is released. 8. Wait until the
When the run-up of the veneer veneer 2 is started and the initial collision force due to inertia is eliminated, and the conveyance of the following veneer veneer 2 progresses and the veneer detector 9 detects the trailing edge, the trailing edge detection signal also immediately changes to the first one. The signal is transmitted to the first and second elevating mechanisms 10a and 10b to move them downward and upward again, strongly braking the plate surface near the rear edge, and causing the pressing roller 20 to idle to a predetermined level. It is configured to stop this at the abutting position. Therefore, the side pressure when the edges of the succeeding veneer veneer 2 and the preceding veneer veneer 8 collide during the conveyance and extrusion process is reduced by the sliding friction of the second movable shoe 7, which provides a slight braking action within the allowable range for the material. While the braking force is maintained at all times, the collision force due to the inertia of the preceding veneer veneer 8 is avoided, and when the entire extrusion operation is completed,
In order to prevent the trailing edge of the leading veneer veneer 8 from moving from the predetermined abutment position, a strong braking force is applied independently by the veneer braking shoe 11 during the next edge abutment extrusion operation. It is configured to be controllable so as to maintain this until the end.

In the figure, 12 is a thread such as synthetic fiber yarn, 13 is a thread nozzle for impregnating the thread 12 with an adhesive such as molten hot melt resin, 14 is a pipe for introducing the adhesive into the thread nozzle 13, and 15 is the thread. An adhesive thread is obtained by impregnating a thread 12 with adhesive through a nozzle 13 and pasting it on a plywood veneer using a wet roller 16; 17 is a link attached to the first movable shoe 6; 18 is a link attached to the second movable shoe 7; This is a link attached to.

(g) Effects of the Invention As mentioned above, the present invention provides an independent unit that can be controlled without relying solely on the slight braking action caused by the sliding friction of the second movable shoe against the single plate surface, which was seen in the conventional device. In order to superimpose the forced braking action and run-up action of the extrusion roller rotated by the plate brake shoe and torque motor, the extrusion roller is rotated by the single plate brake shoe and torque motor during the pause period of the edge abutting extrusion operation. By alternately activating the pressure rollers that act on the edges, the movement can be strongly restrained and run-up so that even if there is a slight pushing force acting on the edge, this can be canceled out and a run-up force can be applied in a timely manner. Because of this, the excessive collision force due to the inertia of the preceding veneer veneer caused by the conventional device and the excessive sliding friction braking force lost by the second movable shoe can cause material buckling and veneer damage. Even if clogging can be completely avoided and this is within the range of some sliding friction braking force that is considered appropriate for the edge abutting operation, it will be Since the forced braking force from the installed single-plate brake shoe is applied, it is completely possible to avoid the situation where gaps are formed in the abutment parts due to unstable edge movement during this period of rest, resulting in poor joints. This invention is extremely effective in its implementation and has been able to significantly improve the yield, work efficiency, and product quality in the horizontal stripping process.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention, in which Fig. 1 is a side view, Fig. 2 is a plan view, and Figs. 3A and 3B are explanatory diagrams of the operation sequence. DESCRIPTION OF SYMBOLS 1...Adhesive, 2...Following veneer veneer, 3...Fixed shoe, 4...Lower stage conveyor, 5...Upper stage conveyor, 6...First movable shoe, 7... - Second movable shoe, 8... Leading veneer veneer, 9... Single plate detector, 10a, 10b... Lifting mechanism, 11... Single plate braking shoe, 19... Torque motor, 20... Press roll.

Claims (2)

[Claims] (1) During periods of rest, except for the operating period of the edge abutting operation of the leading and trailing veneer veneers, an independent veneer braking shoe applies forced braking force to the surface of the veneer, and at the same time Edge edges in a veneer horizontal stripping machine characterized in that a torque motor applies a feeding rotational force to the surface of the veneer during the edge extrusion operation of a veneer veneer and a succeeding veneer veneer. Extrusion braking method during collision. (2) A lower conveyor in which a narrow plywood veneer whose front edge is coated with an adhesive such as molten hot-melt resin is suspended horizontally on a fixing shoe so that it can be freely carried in from the previous stage, and the lower conveyor is suspended horizontally above the lower conveyor. A first movable shoe that applies a pushing force to the succeeding veneer veneer is installed in the front half of the upper conveyor and can be slid freely between the rows of the rear half of the upper conveyor. A second veneer that applies a slight braking force due to sliding friction to the erected preceding plywood veneer
In an extrusion type veneer horizontal stripping machine consisting of a second movable shoe, a veneer braking shoe with an elevating mechanism such as an air cylinder installed between the rows of the second movable shoe, and a pressure roller rotated by a torque motor. and a veneer detector such as a photoelectric switch is installed immediately before the second movable shoe so as to be able to control the elevation and descent of the elevating mechanism. Extrusion braking device when