JPS5853405A - Method of cutting beltlike veneer in rotary clipper - 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 The present invention relates to a method for cutting a sheet material using a rotary clipper having rotating blades. The third method for cutting sheet materials with conventional rotary clippers is
As shown in the figure, a cutter roll 33 having a knife 32 is provided on an anvil roll 31.

In FIG. 3, 34 is an incoming conveyor, and Y-135 is an outgoing conveyor.

A detection device 36 such as a limit switch or a phototube is provided on the downstream side of the conveyor conveyor 35 to issue a command to rotate the cutter roll 33.

The knife 3z of the cutter roll 33 is connected to the carry-in conveyor 34
On the side, it is stopped at a position where it does not come into contact with the strip-shaped veneer 37 being carried in. The carry-in/out conveyor 35 is the carry-in conveyor 34
The speed of the veneer 37 has become somewhat faster, and the veneer that has been cut to a fixed length has been "separated" from the strip-shaped veneer, and preparations are being made to detect the tip of the following strip-shaped veneer 37. It will be done.

In this way, the strip-shaped veneer 37 is sequentially cut to a fixed length.

In this conventional method, the circumferential speed of the cutter roll 33,
Since the position of the detection device 36 is constant, the strip-shaped veneer 37 is sent via the drying device, so the conveyance speed needs to be changed, and if the conveyance speed changes, the detection device 3
After the tips of the veneers 3 and 7 are detected at step 6, the cutter roll 33 begins to rotate, and the distance traveled by the three strip-shaped veneers until the veneer 37 is cut varies. For this reason, the cut veneer has dimensional errors.

In addition, since the cutter roll 33 is rotated and stopped each time the cutting is performed, the life of the clutches, brakes, and other devices used for cutting during this time is shortened, resulting in lower yields and productivity. There was a problem.

The apparatus shown in FIG. 2 has also been used conventionally.

The apparatus of FIG. 2 has a cutter roll 23 having a knife 22 on an anvil roll 21. In FIG. 2, 24 is an incoming conveyor, and 25 is an outgoing conveyor.

A detection device 26 such as a limit switch or a phototube is provided above the carry-in conveyor 24 to issue a command to rotate the cutter roll 23. The cutter roll 23 has a circumferential length that is equal to or longer than the length for cutting a veneer to a specified length. When the cutter roll 23 rotates, the knife 22 of the J-cutter roll 23 is stopped at a position where the cutting edge of the knife 22 has a rotational circumference length O5 to cut the veneer to a fixed length. or cutter roll 23
The speed ratio between the circumferential speed of
The speed is controlled so that the speed is constant.

The strip-shaped veneer 27 is conveyed by the carrying-in conveyor 24i, and when the tip of the strip is detected by the detection device z6, a timer linked to the detection device 26 is activated, and at the same time as the time is up, a rotation command for the cutter roll 23 is issued. is emitted. In this way, the cutter roll 2 BOS rotates, and the strip-shaped veneer 2
Make the cut in step 7. In addition, the detection device 27 detects the band-shaped veneer 2.
After detecting the tip of the cutter roll 2, while continuously detecting that the strip-shaped veneer 27 is being conveyed, the cutter roll 2
3 continues to rotate and continuously cuts the strip-shaped veneer 27 to a fixed length.

In this method, the circumferential speed of the cutter roll 23 and the speed of the carry-in conveyor 24 are configured such that the speed ratio is always constant.

Even if the speed of the carry-in conveyor 24 changes before the cutting command is issued, there is an advantage that the strip-shaped veneer 27 is always cut to a constant length. However, the strip-shaped veneer 27 is cut after detecting the tip of the trowel with the detection device 26i.
After the timing of the interlocked timer 126 is up, a command to rotate the cutter roll 23 is issued, and in order to perform the drive rotation, when the speed of the carry-in conveyor 24 changes after the timer time-up, the belt-shaped veneer is Since the conveyance distance within the timer setting time of 27 changes Q5, variations occur in the cut length of the tip of the strip-shaped veneer 27, resulting in a decrease in yield.

It is an object of the present invention to solve the problem that, in the conventional veneer cutting method using a rotary clipper as described above, an error f's in cutting dimensions occurs, resulting in a decrease in yield and productivity.

That is, the present invention provides a method 1 for cutting a strip-shaped veneer using a rotary clipper, and a detection device 6 that cooperates with a pulse generator 8 is provided on the upstream side of the cutter roll 3, and the detection device 6 is provided on the upstream side of the cutter roll 3 to detect the tip of the strip-shaped veneer at a rate of 7. The moving distance is cumulatively measured, and when the cumulative measurement value reaches the appropriate value for the cutting position, the cutter roll 3 rotates to cut the veneer 7.

By employing such a configuration, the present invention enables the detection device 6 to cut the fixed length veneer to an accurate length even if the conveyance speed of the veneer 7 changes after the detection device 6 detects the tip of the veneer 7. This is what I did.

Embodiments of the method of the present invention will now be described based on the drawings.

(Description of Examples) In Fig. 1 (2), a cutter roll 3 with a knife 2 attached thereto is installed on the anvil roll 1.

4 is an incoming conveyor, and 5 is an outgoing conveyor.

The circumferential length of the rotation locus of the knife 2 of the cutter roll 3 is set to be equal to one cut length of the veneer 7 to a fixed length.

The strip-shaped veneer 7 is sent to a cutter roll 31 by an incoming conveyor 4. A detection device 6 such as a limit sensor or a phototube is installed in the upper part of the conveyor 4 in conjunction with a pulse generator 8, so the speed is 10 to 80.
It is normally driven at variable speeds within the range of ~.

The fixed-length veneer cut by the cutter roll 3 is carried out by a carrying-out conveyor 5.

FIG. 1 O to FIG. 1 ■ illustrate the method of the present invention in the order of steps.

Figure J @ shows the point in time when the detection device 6 detected the tip of the DS strip-shaped single plate. At the time of detection of this strip-shaped veneer 70), the pulse generator 8 starts counting and starts measuring the moving distance l of the veneer. At this point, the knife 2 is in the cutting position (S-
8) is shifted by (W) in the rotational direction of the cutter roll 3.

When the number of pulses reaches the setting position of the cutting command [distance of (A-w) "number of pulses at this position]", the cutter roll starts rotating. (I) is the cutting length of the fixed length veneer. , corresponds to the length of one rotation of the tip of the knife 2.

Figure 1 (■) shows that after the detection device 6 detects the tip of the veneer 7, the tip is actually the cutting position of the cutter roll 3, (S-S).
The point at which the leading edge of the veneer 7 is cut by turning the knife 20 times is shown when the number I is reached.

At the time point (■) in FIG. 1, the 71° lus generator 8 starts counting to measure the distance traveled by the next veneer 7, and starts measuring the distance rl+ the veneer 7 moves. At the same time, the cutter roll 3 also rotates continuously.

FIG. 1 (@) shows the point at which the knife 2 due to the continuous rotation of the cutter roll 3 reaches the cutting position (S-8) and cuts the veneer 7 of a fixed width to the leading edge.

FIG. 1 (■) shows the point at which the knife 2fJ'5 has finished cutting the rearmost end of the strip-shaped veneer 7 and has returned to the starting point (1) of FIG. 1 (■). At this time, the cut length veneer 7a precedes the original strip-shaped veneer with a gap because the speed of the carry-out conveyor 5 is set higher than that of the carry-in conveyor 4.

Since the detection device 6 continues to measure the moving distance of the strip veneer 7 after the time shown in FIG. I'm going to go.

In the above process, even if the conveyance speed of the strip-shaped veneer 7 changes, the movement distance (1) is measured regardless of the conveyance speed f, so the strip-shaped veneer 7 is cut accurately every standard length tl+. be done.

The circumferential speed of the anvil roll 1 and the speed of the unloading conveyor 5 are the same as the speed of the unloading conveyor 4, or 10%
It is preferable that the speed is variable and the speed is variable depending on the speed of the conveyor.

As described above, in the method of the present invention, the strip-shaped veneer 7 is carried in by the carrying co/veyor 4, and the leading end of the strip veneer 7 is detected by the detection device 6. When the detection device 6 detects the tip of the veneer 7, the pulse generator 8 starts to act, emits pulses corresponding to the distance l of the veneer's travel, counts the number of pulses, and stops the veneer. 7. Measure the distance traveled. When the accumulated number of pulses reaches a preset number, a cutting command 05 is issued, and the veneer 7 is cut by the driving rotation of the cutter roll 3.
Cut the tip of the Further, while the detection device 6 is continuously detecting the presence of the veneer after detecting the tip of the veneer 7, the cutter roll 3 is continuously rotated, and the circumference of the cutter roll 3, that is, the cutting length of the fixed-length veneer is measured. Cut continuously. When cutting a fixed-length veneer to a shorter or longer length, a transmission device (not shown) provided on the cutter roll 3 is used to increase or decrease the circumferential speed. The cutting length is changed. Incidentally, it goes without saying that the setting value for issuing the cutting command of the single pulse generator 8 can also be changed.

Effects of the present invention: ■ When cutting the strip-shaped veneer 7, the detection device 6 uses the pulse generator 8.
Then, the moving distance of the strip-shaped veneer 7 is measured.

When the measured moving distance reaches the desired cutting position l, a cutting command is generated.

Therefore, even if the speed of the conveyor 7 on the inlet side changes when cutting the strip-shaped veneer 7, it is possible to cut the strip-shaped veneer 7 into an accurate standard size without causing any misalignment of the cutting position I.

■ When you want to change the cut length to a standard length, attach a speed change device to the cutter roll 3, change the circumferential speed of the cutter roll 3, and change the setting value of the moving distance of the veneer 7 of the pulse generator 8. The standard cutting length can be easily changed by simply changing the length.

[Brief explanation of the drawing]

FIG. 1■; Side view of a cutting device for carrying out the method of the present invention. Figure 1 @■@■; Explanatory diagram of the process of the present invention, Figure 2
FIG. 3 is a side view of an example of a conventional cutting device; FIG. 3 is a side view of another example of a conventional cutting device. (Fig. 1) l... Anvil roll, 2... Knife, 3... Cutter roll, 4... Incoming conveyor, T... Outgoing conveyor, 6.・
...Detection device, 7...Striped veneer, 8.
...Pulse generator, (Fig. 2) 21...Anvil roll, 22...
・Knife, 23.・・・Cutter roll, 2
4... Loading conveyor 25... Loading conveyor. 26...Detection device, 27...Striped veneer, (Fig. 3) 3111.・, anvil roll, 32...
Knife, 33...Cutter roll, 34
... Carrying in conveyor, 35... Carrying skewer conveyor 7.36... Detecting device, 37... Band-shaped veneer. Figure 2. 31 Figure 3

Claims (1)

[Claims] (11 A cutter roll (3) having a knife (2) attached thereto is provided on the anvil roll (1),
), the strip-shaped veneer (7) is carried in by the carry-in conveyor (4).
) is cut with a knife (2), and the cut veneer of fixed length is carried out by the carry-out conveyor (5).In the rotary clipper, the cutter roll (3) is equipped with a detection device that detects the presence of a strip of veneer on the upstream side of the cutter roll (3). (6), and the detection rtBf device (6)
is linked to the pulse generator (8), and the strip-shaped veneer ())
The moving distance of the cutter roll (31 times) is sequentially accumulated and measured as the number of pulses, and when the accumulated number of pulses reaches the set value I of the cutting command, the cutter roll (31 times) and while its presence is detected, the cutter roll ( A method for cutting a strip-shaped veneer using a rotary clipper, characterized in that the cutting to a fixed length is performed continuously by continuous rotation as described in (3). (2) The cutter roll (3) is equipped with a speed change device, 7) When changing the cutting length of the fixed-length veneer to be cut, the speed change device changes the circumferential speed of the cutter roll (3). A method for cutting a strip-shaped veneer using a rotary clipper according to claim 1, characterized by a length.