JPH07227809A - In-size cutting-method using veneer side-stripping machine - Google Patents

Abstract

PURPOSE:To minimize damage to be inflicted by an impact at the time of cutting the front end and rear end defective parts of a narrow veneer of random size without deterioration of the ease of operation and productivity of a machine. CONSTITUTION:In a sized cutting device 16 for cutting the front end and the rear end of a defective part of a narrow veneer 12, of a veneer side stripping machine 10, the speed of a blade 16A is designed so that the free selection of the blade can be made using a control device 32. Thus the speed is selectively set in accordance with the thickness and material of the narrow veneer 12 by the speed setting device 32B of the control device 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous horizontal strip veneer obtained by joining effective veneers obtained by cutting and removing defective portions of random veneer in a plywood manufacturing process, The present invention relates to a dimensional cutting method for a single plate horizontal stripping machine.

[0002]

2. Description of the Related Art A conventional single-plate horizontal stripping machine is disclosed in, for example, Japanese Patent Laid-Open No. 63-149103.

In such a conventional single-plate horizontal stripping machine, the defects and the front and rear end defective parts of the irregular-width narrow single plate carried in by the carrying-in device are detected, and these defective parts are cut and removed by dimensional cutting. , Cut defective part (waste veneer)
The waste veneer is removed by a waste separating device, and the effective veneer is subsequently conveyed and then joined.

In this slicing step, first, when the front end side of the narrow veneer is cut, the scrap separating device stands by upward, and the defective portion protruding from the blade of the cutting device for the narrow veneer is cut. To cut the scrap veneer, drop the scrap veneer, and then return the scrap separation device to the veneer transport path.The narrow veneer with the defective tip cut off is fed into the scrap separation device, After cutting the rear end defective part on the receiving blade part of the cutting device in the projected state, by cutting with the blade of the dimensional cutting device,
An effective veneer is sent from the waste separating device by a carrying device.

[0005]

Generally, in a single-plate horizontal stripping machine, a gap for cutting is provided between the blade of the dimensional cutting device and the tip of the waste separating device. .

In the case of dimensional cutting of a defective tip portion of a random small-width veneer, only the tip portion of the small-width veneer is positioned so as to protrude from the receiving blade of the dimensional cutting device, and most of it is the receiving blade and the carry-in device. Since it is supported above, there is no particular problem even if the cutting speed on the front end side of the narrow single plate is relatively high.

However, during the dimensional cutting of the rear end side of the narrow veneer, the defective part of the rear end of the veneer to be cut is on the receiving blade, and the other part is a scrap separating device and the scrap separating part. It is located in the gap between the device and the blade and the part of the gap is free-standing.

Therefore, when the veneer is made of a material that is easily cracked or easily chipped when the rear end portion of the narrow veneer is sized and cut,
There is a problem in that the effective veneer may be damaged or fall off due to cracking or chipping due to impact during cutting.

In order to reduce the damage to the effective veneer due to the impact at the time of cutting the rear end side of this narrow veneer, it is conceivable to slow down the operating speed of the blade of the slicing cutting device, but in this way, simply When the operating speed is slowed, the workability of the apparatus is lowered and the productivity is reduced.

The present invention has been made in view of the above-mentioned problems of the prior art, and the impact at the time of cutting the rear end is alleviated without uniformly lowering the workability and the productivity, and the effective veneer is damaged. It is an object of the present invention to provide a dimensional cutting method for a single-plate horizontal stripping machine capable of reducing the above-mentioned problem.

[0011]

SUMMARY OF THE INVENTION According to the present invention, defective portions at the front and rear ends of a small-width veneer carried in by a carrying-in device are dimensionally cut by a dimensional cutting device, and the cut defective portion is separated into scraps. A single veneer that is obtained by joining the effective veneers after removal with a device into a continuous horizontal strip veneer and cutting it to a predetermined standard size with a standard length cutting device to obtain a horizontal stripped veneer. In the slicing method for a horizontal stripping machine, the above-mentioned object is achieved by making the cutting speed of the narrow veneer by the slicing cutting device different between the front end defective portion and the rear end defective portion.

Further, the cutting speed of the narrow veneer may be higher on the front end side than on the rear end side.

[0013]

In the invention of claim 1, the cutting speed of the narrow veneer by the size cutting device is adjusted on the front end side and the rear end side thereof according to the material of the narrow veneer to improve workability and productivity. Damage to the effective veneer due to impact at the time of cutting is reduced without decreasing uniformly.

According to the second aspect of the present invention, when the material of the veneer has many cracks or is easily chipped, the front end side is set to have a higher speed than the rear end side, thereby reducing the speed at the time of cutting the rear end side. By compensating for the shortening of the time at the time of cutting, the damage due to the impact at the time of cutting the effective veneer is reduced without lowering workability and productivity.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A single plate horizontal stripping machine for carrying out the dimensional cutting method according to the present invention will be described below in detail with reference to FIG.

This single-plate horizontal stripping machine 10 is a conveyor carry-in device 14 consisting of an endless belt such as a pair of upper and lower belts and chains for carrying small-width single plates 12 of random size.
And a blade 16 placed at the exit position of the carry-in device 14.
A, a conveyor 1 comprising a dimensional cutting device 16 including a receiving blade 16B and an endless belt such as a pair of upper and lower belts and chains
The waste separating device 1 including 8A and 18B is selectively swung between the carrying position on the carrying path by the carry-in device 14 and the standby position swung upward as shown in FIG.
8, a conveyor 20 composed of a plurality of belts, an endless belt conveyor such as a chain, which are continuously arranged on the output side of the waste separator 18, and a conveyor 20 arranged below the conveyor 20 in the vicinity of the front, A nozzle-type gluing device 22 for applying an adhesive to the front end surface of the conveyed effective veneer, which is vertically movable with respect to the conveying surface, and a plurality of strips stretched above the conveying device 20. A crowder device 24 including an endless belt such as a belt and a chain and a pressing body that presses the back surface of the endless belt to apply an adjustment feed force to the effective veneer.

Near the exit side of the carry-in device 14, the receiving blade 1
At a position in front of 6B, a detection device 26 is provided for detecting the thickness of the narrow single plate 12 being conveyed, defects, irregular portions at the front and rear ends, and the like. This detector is a photocell,
It utilizes known technology such as limit switches, ultrasonic waves, differential transformers, lasers, and image sensors.

The slicing device 16 includes the blade 16
A, an eccentric shaft 16C for driving the blade 16B and the blade 16A, and a drive mechanism 16D for driving the eccentric shaft 16C. The drive mechanism 16D is
It is composed of a servo motor, a motor with an electromagnetic clutch and brake, a fluid pressure cylinder, and the like.

The waste separating device 18 includes a pair of upper and lower conveyors 18A and 18B and these conveyors 18A and 18B.
Eccentric shaft 18C for swinging B, and eccentric shaft 18C
And a drive mechanism 18D for driving C. The drive mechanism 18D is composed of a servo motor, an electromagnetic clutch / brake motor, a fluid pressure cylinder, and the like.

Reference numerals 28 and 30 in the drawing are drive mechanisms for driving the carry-in device 14, the carrier device 20 and the crowder device 24, and these drive mechanisms 28 and 30 are the carry-in device 1.
4 servomotors for driving pulleys, sprocket and other rotating wheels 14A and 14B, and conveyor 20 and crowder device 24 for conveyor and pulleys, sprocket and other rotating wheels 20A, 20B. , A motor with an electromagnetic clutch and a brake, and the like.

The drive mechanisms 16D, 18D, 28, 30
Are controlled by the control device 32.

The control device 32 receives the detection signal from the detection device 26 and drives the drive mechanisms 16D and 18D.
A digital circuit 32A for outputting a control signal to D, 28, 30 and a speed setting device 3 for setting a speed control signal of the drive mechanism for the digital circuit 32A.
2B, and is comprised.

Digital circuit 3 in the controller 32
2A is configured by a circuit such as a programmable controller including a circuit capable of appropriately delaying an output signal by receiving a setting signal from the speed setting device 32B and an input signal from the detection device 26. Narrow single plate 1
In response to the signals indicating the cutting positions before and after the defective portion 2 of FIG. 2, the carrying-in device 1 via the drive mechanism 28 of the carrying-in device 14 so that the cutting position is located immediately below the cutting tool 16A of the dimensional cutting device 16.
4 is temporarily stopped, and after the slicing is completed, the carrying-in device 14, the waste separating device 18, and the carrying device 20 are started to carry out control to carry the effective veneer.

The speed setting device 32B sets the cutting operation speed of the blade 16A in the slicing cutting device 16, particularly, the cutting operation speed at the time of cutting the front end side of the narrow single plate 12 and the cutting operation speed at the rear end side. It can be set in steps or in steps.

Here, the cutting operation speed of the blade 16A is usually about 500 mm / sec, but in this embodiment, it is slowed down to 100 to 400 mm / sec at low speed and 600 to 1000 mm / sec at high speed. And being able to be fast.

Further, the cutting operation speed of the blade 16A to be set is determined in consideration of the thickness and material of the narrow single plate 12 to be dimensionally cut, and the driving mechanism 16D of the dimension cutting device 16 is
An appropriate capacity is selected according to the size and operating speed of the blade 16A.

On the output side of the transfer device 20, there is provided a transfer device (not shown), such as a conveyor, which is composed of a plurality of endless belts for transferring the bonded and continuous horizontal strip veneers. A fixed-length cutting device (not shown) is installed between the transfer devices 20 to cut a continuous horizontal strip veneer to a predetermined fixed size by temporarily stopping the loading device 14 and the transfer device 20. There is.

In this fixed length cutting, a fixed length detector (not shown), which is composed of a photoelectric tube and the like, is provided above the carry-out device at a position separated from the fixed length cutting device by a distance of a predetermined fixed length.
However, it is started by detecting the leading edge of the continuous horizontal strip veneer and transmitting a detection signal to the standard length cutting device. The fixed-length cut veneer is loaded into an automatic deposition device (not shown) arranged on the delivery side of the carry-out device.

Next, the operation of the apparatus of the above embodiment will be described with reference to FIG.
Will be described with reference to.

At the tip of the narrow single plate 12 sent by the carry-in device 14, the detecting device 26 detects the thickness, the defect, the irregular portion of the front end, etc., and outputs the signal to the digital circuit 32A in the control device 32. To be done. Based on the input detection signal, the digital circuit 32A receives the signal shown in FIG.
As shown in (A), the carry-in device 14 is driven so as to protrude forward from the receiving blade 16B by the size of the defective portion to cut the narrow veneer 12. After that, the carry-in device 14 is stopped, and the blade 16A of the slicing cutting device 16 is lowered as shown in FIG. 2 (B).

During this time, the waste separating device 18 is swung upward in advance by the drive mechanism 18D in response to a signal from the digital circuit 32A to be in the standby position.

The lower end of the narrow veneer 12 is cut off by the lowering of the blade 16A, and as shown in FIG. 2B, the scrap veneer 12A is dropped and discharged to the outside of the conveying path.
Simultaneously with the start of lowering the blade 16A, the conveyors 18A and 18B of the waste separating device 18 are started to swing downward.

As shown in FIG. 2C, the blade 16A
Rises to the standby position, and when the waste separating device 18 reaches the transport position on the horizontal transport path, the carry-in device 14 and the conveyors 18A and 18B of the waste separating device 18 are driven, and the narrow veneer 12 is removed from the carry-in device 14. It is sent to the waste separating device 18.

The detector 26 detects the rear end defective portion of the narrow single plate 12 in the same manner as described above, and the rear end defective portion is detected by the receiving blade 1.
When the remaining position on 6B is reached, the loading device 14 and the waste separating device 18 are stopped.

After that, as shown in FIG. 2D, the blade 16A is lowered to cut and separate the defective rear end portion, whereby the narrow veneer 12 becomes the effective veneer 13.

As shown in FIG. 2 (E), the waste separating device 18 is swung up to the standby position by the drive mechanism 18D while feeding the effective veneer 13 by the conveyors 18A and 18B. After that, as shown in FIG. 2 (F), the carrying-in device 14 starts carrying in the next small width veneer 12, and the scraped-off scrap veneer 12B on the rear end side is carried in next. It is pushed out by and is dropped and discharged to the outside of the machine.

Conveyors 18A and 18B of the waste separating device 18
The effective veneer 13 is delivered onto the carrier device 20 by
From here, it is cut to a standard length through steps such as gluing and joining by the gluing device 22 and loaded into the automatic deposition device.

On the other hand, as shown in FIG. 2G, the next narrow single plate 12 is cut through the same steps as those in FIGS. The plate 12 is cut and removed at the front and rear end defective portions.

When cutting the defective front end portion of the veneer shown in FIG. 2 (B), even if the narrow veneer 12 is made of a material that is easily cracked or chipped, the tip of the narrow veneer 12 receives the blade. 1
Since it is supported from below by 6B, the cutting operation speed of the blade 16A may be set higher.

On the other hand, the narrow single plate 12 shown in FIG.
If the narrow veneer 12 is made of a material that has many cracks or is easily chipped at the time of cutting the rear end defective portion, the narrow veneer 12 is likely to drop off at the rear end portion due to the impact at the time of cutting.
The cutting operation speed of 6A is set to be slow.

Here, if the cutting speed at the time of cutting the front end side of the narrow veneer 12 is made faster than usual and at the same time the cutting speed at the rear end side is made slower than usual, the sum of the cutting time at the front and rear ends will be conventional. There is no decrease in workability and productivity of the machine since it does not increase.

As described above, in this embodiment, the impact at the time of cutting is reduced and the workability of the machine is reduced according to the material such as the thickness of the narrow single plate 12 to be cut, the amount of cracks, and the easiness of chipping. And, in order to increase the productivity, the cutting operation speed on the front end side and the cutting operation speed on the rear end side of the narrow single plate can be appropriately selected.

[0043]

According to the present invention, since the cutting operation speed of the defective front end portion and the defective rear end portion of the irregular-width small-width veneer is arbitrarily selected, the cutting speed can be adjusted according to the material, thickness, etc. of the small-width veneer. Is selected to improve workability and productivity, and at the same time, it has an excellent effect that damage to the effective veneer due to impact at the time of cutting can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic side view including a partial block diagram showing a single-plate horizontal stripping machine for carrying out the method of the present invention.

FIG. 2 is a schematic side view showing an operation of a main part of the single-plate horizontal stripping machine.

[Explanation of symbols]

 10 ... Single plate horizontal stripping machine 12 ... Narrow width single plate 13 ... Effective single plate 14 ... Loading device 16 ... Dimensional cutting device 16A ... Blade 16B ... Receiving blade 18 ... Waste separating device 20 ... Conveying device 26 ... Detecting device 28, 30 ... Drive mechanism 32 ... Control device 32A ... Digital circuit 32B ... Speed setting device

Claims (2)

[Claims] 1. An effective single piece after a defective portion at the front and rear ends of a random small-width veneer carried in by a carrying-in device is slicingly cut by a slicing cutting device, and the cut defective part is removed by a waste separating device. A dimensional cutting method in a single-plate horizontal stripping machine that joins plates to form a continuous horizontal strip veneer and cuts it to a predetermined standard size with a standard length cutting device to obtain a horizontally stripped standard veneer. 2. The method for slicing a single plate horizontal stripping machine according to claim 1, wherein the cutting speed of the narrow veneer by the slicing cutting device is different between the front end defective portion and the rear end defective portion. 2. The method for slicing a veneer horizontal stripping machine according to claim 1, wherein a cutting speed of the narrow veneer is set so that the front end side is faster than the rear end side.