JPS5847964B2 - Plywood tumbler - Google Patents

Description

[Detailed description of the invention] The present invention relates to a veneer veneer elongation device.

Conventionally, the surface layer of decorative plywood used for the interior of houses, etc., has been created by combining multiple sheets of narrow width sheets formed to a predetermined size using natural grains, such as by laminating or mismatching, to create an aesthetic value. A veneer veneer (hereinafter simply referred to as veneer) with increased hardness is used, and its manufacturing method is, for example, by cutting wood from logs using a slicer, etc., and then cutting off the unnecessary parts to create small width pieces with predetermined dimensions. get the veneer,
Next, the narrow-width veneers are adhered to the surface of the plywood coated with adhesive by a skilled worker while aligning the narrow-width veneers in sequence, or by hand, while aligning the bonding surfaces of the narrow-width veneers having a predetermined size. , which is glued together using an adhesive such as paper tape or a mature plastic adhesive to form a wide single sheet, and then attached to the base plywood or other veneer,
Both methods were unreasonable and required complicated work by many people.

Although there has been a veneer machine that transports veneers with unnecessary parts in a direction perpendicular to the fibers, cuts off the front and rear ends of the veneers, and sequentially laces them together, this is because the veneers that are being carried in are Because the veneer was designed to be cut together to make the most effective use of the veneer, the cutting position was not quantified to follow the original veneer dimensions, resulting in the veneer's dimensions being uncertain. Because of this, it cannot be used for horizontal veneer boards that are used by combining multiple sheets into a set as described above, so this method has been adopted as the next best solution and makes it possible to rationalize the process. There was a desire to develop a horizontal-grain device that could do this.

The present invention is suitable for joining veneers for special purposes, such as decorative veneers used for the surface layer of decorative plywood, etc., in which a plurality of narrow-width veneers formed to a predetermined size are combined into a set. It was developed for the purpose of carrying out this purpose, and is equipped with a so-called anvil roller, a conveyor and cutlery roller that is intermittently driven by an intermittent drive device such as a clutch brake, at the bottom of the conveyor that conveys the veneer in a direction perpendicular to the fibers. A veneer support is provided at the bottom of the roller, the veneer support being swung so that the tip thereof enters and retracts into a concave groove formed in the rotational direction of the roller;
Furthermore, an m-blade is raised and lowered toward the circumferential surface of the roller to cut the veneer, and an adhesive is raised and lowered toward the surface of the veneer on the roller to press the adhesive onto the surface of the veneer. In the cross-cutting device, which consists of a pressure body placed opposite to the roller, and which cuts off the front and rear ends of the veneer carried in in a direction perpendicular to the fibers and sequentially welds them together, the cutting blade is It is equipped with a front edge detection mechanism consisting of a microswitch, etc., and a rear edge detection mechanism that detects the conveyance length of the veneer after cutting the front edge and issues a signal each time the conveyance length reaches a preset length is installed at an appropriate position. By configuring the veneer to cut the front end of the veneer based on the front end cutting signal from the front end detection mechanism and to cut the rear end of the veneer based on the rear end cutting signal from the rear end detection mechanism, Regardless of the original dimensions of the veneers being delivered, each veneer is cut to the preset dimensions and joined in sequence, eliminating the complicated work of conventional methods of obtaining multiple veneers. This makes it possible to perform the desired alignment extremely easily.

The present invention will be described in detail below along with an example of implementation illustrated in the drawings.

FIG. 1 is an explanatory side view of the apparatus according to the present invention.

9 in the figure is an anvil roller provided at the bottom of the conveyor 3 that conveys the veneers 1 and 2 in a direction perpendicular to the fibers, and is equipped with an intermittent drive device such as a clutch brake (not shown) to stop the conveyance when cutting the veneers. (omitted), the conveyor 3 is intermittently driven in the direction of the arrow in the figure.

12 is a cutting blade installed opposite to the anvil roller 9,
It is raised and lowered toward the circumferential surface of the anvil roller 9 by a drive mechanism such as a cam (not shown) so as to cut the front and rear ends of each veneer based on signals from a front end detection mechanism and a rear end detection mechanism that will be described later. .

Reference numeral 13 denotes an adhesive pressure body attached to the anvil roller 9, and from a reel 16 disposed above the adhesive pressure body 13, a feeding roller 11a which can be rotated in forward and backward directions is fed through a pipe 14 and a heater 11. An adhesive thread 15 coated with and impregnated with a thermoplastic adhesive such as a hot melt adhesive is moved up and down so as to press it against the surface of the veneer on the anvil roller 9.

Reference numeral 18 denotes a veneer receiver disposed below the anvil roller 9 so as to differentiate the path between the product veneer and the cut layer after cutting, and a rotatable presser roller 17 is placed above it, and a rotatable presser roller 17 is placed below it. Each has a hook 20 with a hook-shaped tip that can be slid back and forth in the conveyance direction, and swings about the shaft 19 so that the tip comes in and out of a concave groove formed in the rotation direction of the anvil roller 9. I am made to do so.

A plurality of the adhesive pressure bodies 13 and the veneer receivers 18 are arranged at appropriate intervals in the axial direction of the anvil roller 9, and the adhesive pressure bodies 13 are heated using cooling water or the like as necessary. Force cooling.

Reference numeral 7 denotes a plurality of microswitches arranged in a line perpendicular to the veneer transport direction on the upper side of the cutting blade 12 to constitute a front end detection mechanism, and has an idle roller 6 at one end, and a shaft The contacts of each microswitch 7 are connected in series, and as is clear from FIG. is configured to issue a front end cutting signal via a delay mechanism 8 such as a timer when the arm 5 closes as the arm 5 swings.

10 is an anvil roller 9 constituting a rear end detection mechanism.
A gear 10a that engages with a gear 9a attached to the anvil roller 9 so as to generate a pulse signal in conjunction with the rotation of the anvil roller 9.
As can be seen from FIG. It is configured to issue a trailing end cut signal via a preset counter 10b which issues a signal each time a set length is reached.

The apparatus according to the present invention is constructed, for example, as described above, and its operation will be explained step by step as follows.

That is, as shown in FIG. 4, the veneer 1 is carried in by the conveyor 3 with the cutting blade 12, adhesive pressure body 13, and veneer receiver 18 initially raised, and the front end of the veneer 1 is brought in by the idling roller. When reaching the position 6, the arm 5 swings, the contacts of all the microswitches 7 are closed, and a front end detection signal is issued via the delay mechanism 8. Therefore, as shown in FIG. 3 and anvil roller 9 convey the front end of the veneer 1 to below the cutting blade 12 and stop, and the cutting blade 12 descends to cut the front end of the veneer 1.
As shown in the figure, as the cutting blade 12 rises, the veneer receiver 18 descends and the cutter 20 retreats to remove the cutting waste 1.
a is forcibly removed diagonally downward and further lowered to the position where the tip of the veneer support 18 is sunk into the concave groove of the anvil roller 9, the drive of the conveyor 3 and anvil roller 9 is resumed as shown in FIG. As the veneer 1 continues to be conveyed, the preset counter 10b adds up its conveyance length based on the signal from the rotary oscillator 10, and when the preset length is reached, a trailing edge detection signal is issued. As shown in FIG. 8, the conveyor 3 and anvil roller 9 stop, and the cutting blade 12 descends to cut the rear end of the veneer 1.

After that, the cutting blade 12 and the veneer receiver 18 rise, and the cutter
20 return to the forward state and wait for the next veneer to be carried in as the conveyor 3 and anvil roller 9 resume driving.

Then, as shown in FIG. 9, the driving of the conveyor 3 and the anvil roller 9 is restarted, and the cutting waste 1b falls diagonally downward and is removed, and the front end of the following veneer 2 is moved to the position of the idle roller 6. When the arm 5 reaches the destination, the arm 5 swings, the contacts of all the microswitches 7 are closed, and a front end detection signal is issued via the delay mechanism 8. As shown in FIG. transports the front end of the veneer 2 to below the cutting blade 12 and stops, and
The cutting blade 12 descends to cut the front end of the veneer 2.

Next, as the cutting blade 12 rises, the veneer receiver 18 descends and the cutter 20 retreats to forcibly remove the cutting waste 2b diagonally downward, and the tip of the veneer receiver 18 enters the concave groove of the anvil roller 9. After descending to the recessed position and the rear end cut surface of the preceding veneer 1 and the front end cut surface of the following veneer 2 are aligned on the circumferential surface of the stopped anvil roller 9, the second As shown in FIG. 11, while the adhesive thread 15 melted by the heater 11 is fed out by the feeding roller lla, the adhesive pressure body 13 descends, and the adhesive thread 15 is delivered to both veneers 1.
・Press it into a cross-linked form on the surface of 2 and further extend it.
With the reversal of a, the adhesive thread 15 is cut by the sharp corner 13a of the adhesive pressure body 13, thereby completing the joining of both veneers 1 and 2.

Next, the apparatus returns to the state shown in FIG. 7, and by repeating the same operations one after another, each veneer is cut to a predetermined size, as shown in FIG. 12, for example. A horizontal veneer 21 can be produced.

As is clear from the above, the device according to the present invention cuts the rear end of the preceding veneer and the front end of the following veneer at the same position with a single cutting blade, and aligns and joins at the cutting position. Because it performs this process, it is of course possible to perform extremely accurate dovetail alignment, but it also detects the conveyance length after cutting the front end of the veneer, and issues an alarm each time the conveyance length reaches a predetermined length. Since the rear edge is cut based on the signal, it is possible to cut each veneer to the preset dimensions and join the veneers, regardless of the original dimensions of the veneers being delivered. This eliminates the need for many conventional manual labors and makes it possible to extremely easily cut veneers for purposes such as combining a plurality of veneers of a predetermined size.

In the examples, an adhesive thread made by coating and impregnating a thread with a thermoplastic adhesive such as hot melt was used as the adhesive, but any adhesive can be used as long as it can bond veneers together. In addition, the front edge detection mechanism is not limited to the type that directly contacts the veneer, but even if it is a type that indirectly detects the edge using a phototube, etc., the main point is that it is configured to be able to determine the cutting position. There is no problem if you do.

[Brief explanation of drawings]

The drawings are for explaining the present invention, and FIG. 1 is a side view of the device according to the present invention, FIG. 2 is a circuit diagram of the front end detection mechanism, and FIG. 3 is a front view of the rear end detection mechanism. Explanatory diagram, 4th
11 is an explanatory view of the operation of the apparatus, and FIG. 12 is a plan view of a horizontal veneer veneer. 1, 2...Single plate, 3...Conveyor, 7
...Micro switch, 9...Anvil roller, 10...Rotary oscillator, 10b...
... Preset counter 12 ... Cutting blade, 13 ... Adhesive pressure body, 15 ... Adhesive thread, 18 ... Veneer holder.

Claims (1)

[Claims] 1 At the bottom of the conveyor that conveys the veneer veneer in a direction perpendicular to the fibers, there is provided a conveyor/cutler receiving roller that is intermittently driven by an intermittent drive device such as a clutch brake, and a concave shape formed in the rotational direction of the roller. A veneer receiver is provided at the bottom of the roller, the tip of which can be swung so that it appears and retracts into the groove, and a cutting blade that is moved up and down toward the circumferential surface of the roller to cut the veneer veneer, and a veneer receiver on the roller. The veneer veneer is carried in a direction perpendicular to the fibers, and an adhesive pressurizing body that is moved up and down toward the surface of the veneer veneer so as to press the adhesive onto the surface of the veneer veneer is installed opposite to the roller. A veneer veneer crosscutting device is designed to cut out the front and rear ends of the veneer veneer and join the veneers together sequentially, and the cutting blade is equipped with a front end detection mechanism consisting of a microswitch, etc. on the upper side of the cutting blade. Detects the conveyance length and determines that the conveyance length is
A rear end detection mechanism is provided at an appropriate position to emit a signal each time a preset length is reached, and the front end of the veneer veneer is cut based on the front end cutting signal from the front edge detection mechanism, and the rear end detection mechanism A veneer veneer gruel 1 apparatus characterized in that it is configured to cut the rear end of each veneer based on a cutting signal.