JPS6142801Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of the veneer cutting and gluing device disclosed in the earlier application, Japanese Patent Publication No. 55-45011.

In the invention of the earlier application, a plurality of guide holes are provided in the blade to serve as paths for the adhesive, and adhesive is discharged from the opening of each guide hole each time the cut is made, and applied to the end surface of the effective part that has been cut and separated from the defective part. However, since the cutter has a guide hole, the structure is complicated and the production cost is high.
Another problem was that the adhesive could not be applied to the entire end surface of the veneer.

This idea was developed based on the fact that the adhesive has a stronger adhesion force on the soft, rough wooden surface than on the hard, smooth surface of the blade. This method solves the problems of the previous application by having a simple configuration in which the device is transferred to the end surface of the veneer, and will be explained below with reference to the embodiments shown in the drawings.

The carry-in conveyor 1 conveys the veneer A in a direction perpendicular to its fibers, and the fixed receiving blade 2 is attached to a receiving blade stand 3 disposed near the end of the carrying-in conveyor 1. The cutter 4 is attached to the cutter holder 5 so that its back surface 4a faces the loading side of the veneer A, and the cutter 4 is moved to the standby position shown by a solid line in FIG. 1 by an actuation mechanism 6 such as a fluid pressure cylinder. The veneer A is moved up and down between cutting positions indicated by dashed lines, and at the cutting position, the blade 4 and the receiving blade 2 cut the veneer A in the fiber direction to separate the defective portion Aa.

The applicator 7 applies an appropriate amount of adhesive G such as vinyl acetate resin or urea resin to the back surface 4a of the blade 4 when the blade 4 is stopped at the standby position as shown in FIG. A strip Ga or a broken line is formed approximately parallel to the cutting edge line X-X of the cutting edge 4b of the knife 4.
Gb (Fig. 3) is also cut so that it spans roughly the entire length of the veneer A in the fiber direction. Also back side 4
The position at which the adhesive G is applied to a is set close to the cutting edge 4b so that it almost coincides with the end face of the veneer during cutting, or so that it passes through it to some extent.

The coating device 7 includes, for example, a nozzle 8, an electromagnetic on-off valve 9, a pipe 10, and a glue tank 1 as in the embodiment.
1. It is composed of an air compressor 13 etc. that supplies compressed air into the glue tank 11 through a pipe 12, and when the electromagnetic on-off valve 9 is opened, the adhesive G is discharged from the nozzle 8 and stopped at the standby position. It is attached to the back surface 4a of the cutting tool 4 in the form of a band Ga or a broken line Gb. It is desirable to discharge the adhesive G from the nozzle 8 immediately before the knife 4 in the standby position starts its operation for cutting. This is done by disposing a detector 14 that emits the same on the carry-in conveyor 1 and transmitting the detection signal of the detector 14 to the electromagnetic on-off valve 9 via a timer 15. The cutting operation of the blade 4 is performed by transmitting the detection signal of the detector 14 to the operating mechanism 6 via the timer 16, and when the boundary line between the effective part and the defective part of the veneer A reaches the position of the receiving blade 2. This is done by setting the timer 16 to expire so that the disconnection occurs. Further, the application device 7 is not limited to the method of discharging the adhesive G using a nozzle as in the embodiment, and for example,
The same method can also be carried out by using a means for attaching the adhesive G to the strip Ga or the broken line Gb on the back surface 4a approximately parallel to and close to the cutting edge by providing a removable applicator roll or applicator bar at position a. It is possible.

After the adhesive G is applied to the back surface 4a by the applicator 7 in this way, the blade 4 is operated to perform cutting, but the part of the back surface 4a to which the adhesive G has been applied is the part of the veneer A that is cut. When reaching or passing through the position of the end surface, the back surface 4a comes into contact with the end surface, as shown in FIG. In this case, the end surface of the veneer A is the back surface 4 of the cutter 4.
The adhesive G is rougher and softer than the back side 4a.
It is transferred so that it is coated on the end surface by
The adhesive G can be reliably applied to the end face.

In the diagram shown in FIG. 2, the state in which the blade 4 has reached the cutting position is shown by a solid line, and the state in the standby position is shown by a dashed line.
In this example, the nozzle 8 of the applicator 7 that discharges the adhesive G is attached to the cutting edge 4b of the knife 4 that protrudes from the cutting edge of the receiving blade 2 after cutting the veneer A. There is a cutting edge 4 on the back side 4a nearby.
The adhesive G is arranged at an appropriate position on the blade rest 3 so as to be able to adhere to the strip Ga or the broken line Gb approximately parallel to the direction b, and the adhesive G is discharged from the nozzle 8 so that the cutting edge 4b of the cutter 4 receives the adhesive G. The time limit of a timer 15 for controlling the electromagnetic on-off valve 9 is set so as to be performed in synchronization with the timing when the blade 2 protrudes from the cutting edge. In this embodiment as well, when the cutter 4 moves up after the adhesive G has been applied to the back surface 4a, the adhesive G is transferred so as to be applied to the end surface of the veneer A cut by the back surface 4a. Adhesive G can be reliably applied to the end face. In this embodiment, the cutting edge 4b is made to protrude somewhat more than the cutting edge of the receiver blade 2 during cutting so that the adhesive G can adhere to the back surface 4a near the cutting edge 4b.

In Figures 1 and 3, 17 is a scraping body, and scraping body 1
7 uses a rotating roller or the like to advance and retreat between the positions shown by the solid line and the dotted line each time cutting is performed or as appropriate, and when the position shown by the dotted line comes into contact with the back surface 4a of the cutter 4, the adhesive G remaining on the back surface 4a is removed. Perform the removal of.
18 is an unloading conveyor, 19 is an opening/closing body, and opening/closing body 1
Reference numeral 9 serves to remove the defective part Aa from the conveyance path and guide the valid part to the carry-out conveyor 18.

In the embodiment shown in FIG. 5, a shallow groove 20 is formed on the back surface 4a of the cutter 4, and an adhesive G is applied to the groove 20 by a coating device 7 in a band-like shape Ga or a broken line Gb approximately parallel to the cutting edge 4b. In this case, the adhesive G is applied so as to protrude somewhat from the back surface 4a. The structure in which the adhesive G is attached by forming the groove 20 on the back surface 4a in this way is such that the adhesive G is directly transferred to the end surface of the cut veneer A, and then coated by the back surface 4a. This has the advantage that the adhesive G can be more reliably applied without excessively protruding onto the surface of the veneer.

As described above, this device has a configuration in which adhesive is applied in a strip or broken line shape to the back surface of the blade at the standby position or cutting position of the blade, and this is transferred to the end surface of the cut veneer. The device is much simpler and cheaper than the original, and since the adhesive is applied to the end face of the veneer using the back side of the cutter, it is possible to reliably apply the adhesive to the end face of the veneer. Since the adhesive can be applied in a band-like manner, it has various effects such as making it possible to apply the adhesive to the entire end surface of the veneer, making a great contribution to the plywood industry.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention. Figure 1 is a side view of adhesive being applied to the back of the blade at the standby position of the blade, and Figure 2 is a side view of adhesive being applied to the back of the blade at the cutting position. Figure 3 is an explanatory diagram showing the state of the adhesive adhered to the back side of the cutter, and Figure 4 is an explanatory diagram showing the state of the adhesive adhered to the back side of the cutter. FIG. 5 is an enlarged side view of an embodiment in which a groove is formed on the back surface of the cutter. 2...Blade, 4...Knife, 4a...Back side, 4b
...Blade tip, 7...Coating device, 20...Concave groove, A...
...Single plate, G...adhesive, Ga...band shape, Gb...dashed line shape.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a shearing type veneer clipper that cuts defective parts in the fiber direction of a veneer that is conveyed in a direction perpendicular to the fibers by a fixed blade, a receiving blade, and a blade that moves up and down, The back side of the cutter is placed opposite to the loading side of the veneer, and at the standby position or cutting position of the cutter, apply an appropriate amount of adhesive in the form of a strip or a broken line to the back of the cutler near the cutting edge of the cutter and approximately parallel to the cutting edge line. A veneer cutting and gluing device, characterized in that it is equipped with a coating device for adhering the veneer in a shape. (2) The veneer cutting and gluing device according to claim 1 of the Utility Model Registration Claim, which has a shallow groove formed on the back surface of the cutter for adhering the adhesive.