JPS6149083B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention is equipped with a forced-feeding incoming conveyor and a free-running pressure conveyor, and uses a push-feeding method to abut the ends of the veneers against each other, and then temporarily stops the conveyance and cuts the veneer to a fixed length. This invention relates to a fixed-length cutting device for a veneer cross-cutting machine, and aims to reduce cutting errors in fixed-length cutting dimensions.

In a push-feed type veneer horizontal stripping machine, continuous veneer is formed intermittently, and when the incoming conveyor is temporarily stopped to cut to a specified length, the intermittent drive mechanism such as the clutch and brake that drives the incoming conveyor is Since there is a slight delay in operation, the standard length detector is placed on the delivery conveyor from point P, which is separated by the desired standard length L from the cutting position, to the delivery side by a transport distance L' on the delivery conveyor corresponding to this activation delay time. It is placed at the nearby Q point. However, in the case of horizontal splintering using the push-feed method, when the front end of the continuous veneer reaches point Q, there may be a veneer with a width longer than the transport distance L' on the input side of the butt position as shown in Figure 1. In this case, a normal cut to length at point P is performed, but when the front end of the continuous veneer reaches point Q as shown in Figure 2, there is no veneer or there is only a small amount of veneer on the input side of the meeting position. If there is only width, the front end of the continuous veneer is stopped at the Q point or a position slightly advanced from the Q point and cut to a fixed length, resulting in a cut to a fixed length that is less than the desired fixed length L. , a cutting error of the maximum transport distance L' will occur. This invention was developed in order to reduce this cutting error, and the free-running running path of the pressure conveyor between the meeting position and the fixed length cutting mechanism is made into a telescoping path that can be adjusted to extend and contract into a long path and a short path. This problem has been solved by a simple structure of forming, and will be explained below using examples.

The carry-in conveyor 1 is formed by a plurality of upper and lower endless strips, and conveys a small width veneer A in a conveyance direction F perpendicular to the fibers thereof by an intermittent drive mechanism 2 consisting of a clutch, brake, etc. , a force is applied to the veneer A by a pressurizing body 3 that presses the back surface of each of the upper and lower endless bands. The pressure conveyor 4 forms a free running path for the veneer A following the loading conveyor 1.
A braking action is applied to the veneer A conveyed from the veneer A, and the rear end stops almost in alignment with the meeting position At this step, a push-feed type cross-splitting process is performed in which the end faces of the veneers A are abutted against each other to form a continuous veneer B. Generally, an applicator for applying an adhesive such as hot melt adhesive to the front end surface of the veneer A is provided at an appropriate position on the conveyor 1, and a thread pasting device is provided at the lower side of the meeting position X-X. is provided, and the continuous veneer B is firmly joined.

For example, as in the embodiment, the pressure conveyor 4 has a plurality of upper and lower endless strips stretched over the front and rear rotary wheels to form a running path for the veneer to run freely, and these are connected to the front and rear endless strips, respectively. It is divided into the endless belt group 4-1, the middle endless belt group 4-2, and the rear endless belt group 4-3, with the front endless belt group 4-1 fixed, and the middle endless belt group 4-3. 4-2 is centered around the shaft 5 of one rotating wheel that stretches the endless band, and the rear endless band group 4-3 is centered around the shaft 6 of one of the rotating wheels that stretches the endless band. The plate is provided so as to be able to rotate while maintaining its running path, and these rotations are performed by a telescoping mechanism 7 that can adjust the amount of rotation and is made of a servo motor or a fluid pressure cylinder. The free running path according to 4-3 can be adjusted and switched between a long path, such as a curved shape, as shown in Figure 1, and a short path, in which both paths are straight, as shown in Figure 2. This forms an expansion and contraction path for the pressure conveyor 4 between the meeting position XX and the regular length cutting mechanism 8 disposed following the rear endless band group 4-3. The distance difference between the long path and the short path is the transport distance corresponding to the operation delay of the intermittent drive mechanism 2.
Set approximately equal to L′. In addition, the pressure conveyor 4
The running path for free running is formed by a plurality of upper and lower bar-like bodies instead of a plurality of endless strips, and these bar-like bodies are adjustedly rotated by the telescopic actuation mechanism 7 to form a long path. This can also be implemented in the same way by forming an expansion/contraction path that can be switched to a short path.

The fixed-length cutting mechanism 8 consists of a blade 9, its operating mechanism 10, and a receiving blade 11, and performs cutting to a fixed length by the reciprocating motion of the cutter 9, and the carry-out conveyor 12 is disposed following the fixed-length cutting mechanism 8, It constantly travels at a predetermined speed, and when the continuous veneer B is stopped, it slips, and when the expansion and contraction path of the pressure conveyor 4 is switched to a short path, the continuous veneer B is moved and cut to a fixed length. When the fixed length veneer is removed, it is transferred to the next process such as stacking.

The fixed length detector 13 is placed on the carry-out conveyor 12 at a point Q, which is located on the carry-in side by a conveying distance L' corresponding to the operation delay time of the intermittent drive mechanism 2, from a point P, which is separated by a desired fixed length L from the cutting position. It was arranged according to the
When the front end of the continuous veneer B is detected, the signal is transmitted to the intermittent drive mechanism 2 to temporarily stop the carry-in conveyor 1, and the detection signal of the front end of the continuous veneer B is transmitted to the operating mechanism 10 via the control circuit 14. It will be done.

The veneer detector 15 is placed on the incoming conveyor 1 at a distance of more than a conveying distance L' corresponding to the operation delay time of the intermittent drive mechanism 2 on the incoming side from the meeting position XX, and detects the incoming veneer A. The presence or absence of this is detected, and the signal is transmitted to the telescopic actuation mechanism 7 via the control circuit 14. When the fixed length detector 13 detects the front end of the continuous veneer B, and the veneer detector 15 detects the veneer A, the expansion and contraction path of the pressure conveyor 4 is expanded and contracted so that it becomes a long path. The mechanism 7 is controlled, and after the carry-in conveyor 1 has stopped, the cutter 9 performs cutting to a fixed length.
In this case, since the front end of the continuous veneer B stops almost coincident with point P, cutting to a desired length L is performed. The expansion and contraction path is configured to form a long path under normal conditions when the front end of the continuous veneer B has not reached point Q.

The movement amount detector 16 is arranged at an appropriate position such as above the carry-out conveyor 12, and the fixed length detector 13
After detecting the front end of the continuous veneer B, the amount by which the continuous veneer B moves is measured. As the movement amount detector 16, an appropriate device such as a device that can measure the amount of movement by rotation or an image sensor is used, and the amount of movement is converted into an electrical amount and sent as a signal to the telescopic actuation mechanism 7 via the control circuit 14. The telescopic path of the pressure conveyor 4 is switched from a long path to a short path with a distance difference corresponding to the amount of movement. The signal from the movement amount detector 16 is controlled to be activated only when the fixed length detector 13 detects the front end of the continuous veneer B and the veneer detector 15 does not detect the incoming veneer A. That's what I do. In this way, when the fixed length detector 13 detects the front end of the continuous veneer B and the veneer detector 15 does not detect the incoming veneer A, the movement amount detector 16 detects the front end of the continuous veneer B. The expansion and contraction path of the pressure conveyor 4 is adjusted from a long path to a short path based on the amount of movement of the front end from point Q, and the front end of the continuous veneer B is almost aligned with point P, and the cutter 9 cuts it to a fixed length. Therefore, it is possible to always cut the desired standard size L.

In addition, instead of arranging the veneer detector 15, a lever-type one is used as the fixed length detector 13, and after detecting the front end of the continuous veneer B, the lever detects the conveyance distance.
A signal is emitted when the turn corresponds to L', and if this signal is emitted within a predetermined time, it is a signal indicating that there is a veneer with a width equal to or greater than conveyance distance L' on the carry-in side of the meeting position XX. It is also possible to similarly implement a configuration in which, if a signal is not transmitted within a predetermined period of time, a signal indicating that there is no veneer on the carry-in side of the meeting position XX is taken out.

As described above, the present invention provides a veneer cross-cutting machine that is equipped with a forced-feeding incoming conveyor and a free-running pressure conveyor, and performs cutting to a fixed length by temporarily stopping conveyance. It is formed into a telescopic path that can be switched into a long path and a short path, and when the front end of the continuous veneer is detected by the fixed length detector, the transport distance corresponding to the activation delay time of the intermittent drive mechanism of the loading conveyor is set on the loading side of the meeting position. It is equipped with a detection means for detecting the presence or absence of a veneer having a width above, and a movement amount detector that measures the amount of movement of the continuous veneer after the fixed length detector detects the continuous veneer. The expansion and contraction path of the pressure conveyor is switched from a long path to a short path with a corresponding distance difference, and the continuous veneer is cut to a specified length when the front end reaches a certain position. It is possible to cut to a fixed size, improve the yield of this type of horizontal stripping machine, and make a great contribution to the plywood industry.

[Brief explanation of the drawing]

The drawings show embodiments of the invention, FIGS. 1 and 2.
The figure shows the outline of this device, and Fig. 1 shows the abutting position X-
Figure 2 is a side view when there is a veneer with a width equal to or longer than the transport distance L' on the carry-in side of X and the expansion path is long. Moreover, it is a side view in case an expansion-contraction path is a short path. 1... Carrying-in conveyor, 2... Intermittent drive mechanism, 4
...Pressure conveyor, 4-1...Front endless belt group,
4-2... Middle endless band group, 4-3... Rear endless band group, 7... Telescopic actuation mechanism, 8... Regular length cutting mechanism, 12... Carrying out conveyor, 13... Regular length Detector, 15...Single plate detector, 16...Movement amount detector, A...Single plate, B...Continuous veneer, L...Desired fixed size, L'...Transportation distance, X- X... Collision position.

Claims (1)

[Claims] 1 Equipped with an intermittent-driven incoming conveyor that forcibly feeds the veneers in the order of the conveyance direction, a pressure conveyor that forms a free running path for the veneers, a fixed-length cutting mechanism, and a constantly running outgoing conveyor, and the forced feeding of the incoming conveyor. In a veneer cross-cutting machine that uses the area where the force disappears as the abutting position of the end faces of the veneers and temporarily stops the conveyor to cut the veneers to a specified length, the pressure between the abutting position and the accommodating mechanism for cutting the veneers to a specified length is The conveyor is formed with a telescopic path that can be switched into a long path and a short path with a distance difference that is approximately equal to the transport distance of the loading conveyor, which corresponds to the activation delay time of the intermittent drive mechanism that stops the loading conveyor, and an expansion and contraction path that can adjust the distance difference. A length detector is provided with an operating mechanism and detects the front end of the continuous veneer on the carrying-out conveyor to temporarily stop the carrying-in conveyor and actuates a fixed-length cutting mechanism; A veneer detector for detecting the presence or absence of a veneer is installed at a distance greater than the transport distance due to the operation delay from A movement amount detector is provided to measure the amount of movement, and when the fixed length detector detects the front end of a continuous veneer and the veneer detector is detecting an incoming veneer, the pressure is increased. The expansion and contraction path of the conveyor is cut to a fixed length as a long path, and when the veneer detector does not detect an incoming veneer, the expansion and contraction path of the pressure conveyor is activated by the operation of the expansion and contraction mechanism based on the measurement value of the movement amount detector. A fixed-length cutting device characterized by switching to a short path and cutting to a fixed length.