JPS6016883B2 - Conveyance drive device in continuous veneer cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes forming a double-sided receiving blade at a right angle or an angle close to a right angle, and constructing and fixing the ridgeline of the said double-sided receiving blade facing a veneer loading path. , a unit configured such that a cutting blade for front cutting and a cutting blade for back cutting, which are opposed to each other at a right angle or at an angle close to a right angle with the veneer loading path in between, can be taken out and put in alternately. This invention relates to an improvement of a conveyance drive device in a continuous plate cutting machine.

The above-mentioned continuous cutting machine is configured so that the veneer is continuously conveyed by an incoming and outgoing conveyor, and can be separated into chips and product veneers using two cutting blades, one for front cutting and one for back cutting. Therefore, during sizing cutting, such as shortening the effective part, cutting the front edge of narrow-width veneer, and cutting the back green, it is safely and reliably processed as it is continuously conveyed. When cutting a board into predetermined lengths, the trailing cutting blade of the two cutting blades cuts and separates the sizing section, so it can be used for the next trailing edge cutting. It was necessary to immediately restore the cutting blade by pulling out the cutting blade for the front cutting and retracting the cutting blade for the rear cutting.

However, if this type of restoring operation of the cutting blade is performed while the veneer is being conveyed continuously, the cutting blade for the rear cutting will automatically cut the veneer to a fixed length, and then the cutting blade for the front cutting will automatically cut the front green again. This causes the inconvenience that the effective portion is cut and separated as extra chips, which significantly reduces the cutting yield. Finally, the present invention solves the problem of cutting to a fixed size in a continuous veneer cutting machine having two cutting blades for front cutting and rear cutting by organically linking an electromagnetic clutch brake and a differential drive mechanism. An example of its implementation will be described below with reference to the drawings.

That is, the present invention prepares a double-sided receiving blade 1 having two receiving blade surfaces la and lb polished at right angles or near right angles, and also aligns the ridge line x of the double-sided receiving blade 1 with the direction in which the veneer 2 is brought in. It is installed horizontally so as to face the carrying-in direction of the carrying-in conveyors 3a and 3b, which serve as roads, and is fixed to the machine frame to form the main body of the continuous cutting machine.

In addition, a cutting blade 4a for front cutting and a cutting blade 4b for rear cutting are connected to the receiving blade surfaces la and lb of the two-sided receiving blade 1, respectively, on carrying-in conveyors 3a and 3b which serve as a carrying path for the veneer 2. It is configured so that it can be taken out and retracted alternately from positions opposite to each other at right angles or near right angles, and the receiving blade surface lb located below the two-sided receiving blade 1 and the cutting blade 4a for front cutting are connected to each other. Open the lower part of the intersecting cutting place and remove the front cutting chips 5a and the rear cutting chips 5.
b is configured so that it naturally falls directly below, and the receiving blade surface la located above the double-sided receiving blade 1 and the cutting blade 4b for rear cutting
The carry-out comparers 6a, 6 are arranged so that a carry-out path to the subsequent process is formed near the receiving blade surface la above the cutting place where the two intersect.
It is configured as a control mechanism of a continuous cutting machine that continues to convey the cut product fist plate 7 in the carrying-out direction by constructing the cross-section b. Next, each cutting blade 4a in the continuous cutting machine
, 4b and carry-in and carry-in comparers 3a, 3b, 6a, 6
To explain the drive device b, each of the cutting blades 4
The cutting blades 4a, 4b can be alternately pulled out and retracted.
4b is connected to a crank 8 via a Y-shaped link 8a, and the output shaft 9a of a first electromagnetic clutch/brake 9 capable of half-turn and one-turn control is connected to the drive shaft 8b of the crank 8. The output shaft 10a of the motor 10 is connected to the input shaft 9b of the clutch brake 9, and the crank 8 is controlled to perform the dimensional cutting each time a cutting signal for the dimensional cutting and fixed dimensional cutting is transmitted from a cutting control circuit 16, which will be described later. The structure is configured such that it can be controlled by half a rotation in the case of cutting to a fixed size, and can be controlled by one rotation in the case of cutting to a fixed size.

Further, the output shaft 9a of the first electromagnetic clutch brake 9 connected to the drive shaft 8b of the crank 8 is connected to the input shaft 11a of another second electromagnetic clutch brake 11,
The output shaft 11M of the second electromagnetic clutch brake 11,
When there is no speed difference between the rotations of the left and right input shafts 12a and 12b, the output shaft 12c stops rotating, and when a speed difference occurs between the rotations of the left and right input koji 12a and 12b, the rotation of the speed difference is output. The input malt 1 on either the left or right side of the differential drive mechanism 12 consisting of a differential gear device etc. generated on the shaft 12c
Connect 2a. Further, the input shaft 9b of the first electromagnetic clutch brake 9 is connected to the input shaft 12b on either the left or right side of the reed drive mechanism 12, and the output shaft 12c of the differential drive mechanism 12 is and carry-in comparer 3a
, 3b, 6a, 6b are connected to the drive shafts 3c, 3d, 6c, 6b. Furthermore, a veneer detector 13 consisting of a plurality of photoelectric switches, limit switches, etc. is provided in a line perpendicular to the conveying direction on the carry-in and carry-in comparers 3a, 3b, and each of the veneer detectors 13 is When all of the detection signals detect the effective portion of the veneer 2, a cutting signal is sent for the leading edge cutting point, and when any of the detection signals fails to detect the effective portion of the veneer 2, a cutting signal is sent for the trailing edge cutting point. A discriminating circuit for leading edge cutting and trailing edge cutting is made of an AND element, a NAND element, etc., and each cutting signal output from the discriminating circuit is stored and proportional to the conveyance amount of the veneer 2. A storage device comprising a timer, a counter, a magnetic memory, etc., which delays the memory, reproduces the memory each time each cutting point reaches the cutting position, and outputs a cutting signal to the first electromagnetic clutch brake 9 each time. A sizing cutting control circuit 14 having a built-in sizing cutting control circuit 14 starts counting operation based on a leading edge cutting signal of the sizing cutting control circuit 14, and sends a sizing cutting signal to the first electromagnetic converter every predetermined sizing period. At the same time as outputting a predetermined length disconnection signal to the clutch brake 9, a predetermined length disconnection signal is output to the second electromagnetic clutch brake 1.
A sizing and sizing cutting controller 16 is constituted by a sizing cutting control circuit 15 which outputs a sizing signal to the sizing cutting control circuit 1 and finishes the counting operation by outputting a rear green cutting signal from the sizing cutting control circuit 14. . Therefore, when the veneer detector 13 detects the leading edge and trailing edge cutting points of the veneer 2, the sizing cutting control circuit 14 of the cutting controller 16 separates them into a leading edge cutting signal and a trailing edge cutting signal, respectively, and delays them as appropriate. Each time each cutting point reaches the cutting position directly below the cutting blades 4a, 4b, an output signal is first transmitted to the first electromagnetic clutch/brake 9, and the first electromagnetic clutch/brake is activated to crank the crank. 8 is controlled by half a rotation to cut and separate the chips 5a, 5b and the product veneer 7 vertically at the same time as the cutting blades 4a, 4b cut at the leading edge and trailing edge cutting points. At this time, the sizing cutting control circuit 15 performs a counting operation, but since the cumulative length is not enough to output the sizing cutting preliminary signal, the output signal is not output to the second electromagnetic clutch brake 11. Since the output shaft 11b of the second electromagnetic clutch brake 11 continues to be at rest, the input shaft 12a on one side of the differential drive mechanism 12 stops rotating, and the input shaft 12b on the other side is not connected. Due to the rotation input from the motor 10, the continuous conveyance of the carry-in and carry-in comparers 3a, 3b, 6a, and 6b is continued. Next, when the veneer detector 13 continues to detect the effective portion of the veneer 2 and a sizing cutting signal is output from the sizing cutting control circuit 15 of the cutting controller 16 to the first electromagnetic clutch brake 9. , the first electromagnetic clutch brake 9
is now operated to control the crank 8 by one rotation,
The cutting blade 4b for rear cutting performs a sizing operation on the product veneer 7 at a predetermined sizing cutting position, and then the cutting blade 4a for front cutting is operated so as not to interfere with the conveyance of the subsequent product veneer 7. Then, the cutting blade 4b for post-cutting is returned to the initial position, and the fixed-size cutting operation is completed. Further, prior to this sizing cutting operation, a sizing cutting preliminary signal is transmitted to the second electromagnetic clutch brake 11 shortly before the sizing cutting signal is output from the sizing cutting control circuit 15 of the cutting controller 16. Even if the input shaft 11a of the electromagnetic clutch brake 11 stops, the connection is switched from the brake side to the clutch side for a while. After this switching is completed, the sizing cutting signal is
Therefore, when the output shaft 9a connected to the crank 8 starts rotating for the fixed size cutting operation, the second electromagnetic clutch brake 1
Both the input shaft 11a and the output shaft 11b of No. 1 start rotating at the same time. Output shaft 11 of the second electromagnetic clutch brake 11
When b starts rotating, the input shaft 12a on one side of the differential drive mechanism 12 connected to the output shaft 11b is interlocked, so that the cutting blade 4b for rear cutting is just at the time when it bites into the veneer 2. When the speed difference with the input shaft 12b on the other side disappears, the output shaft 12c stops rotating, and the carry-in and carry-out conveyors 3a, 3b, 6a, 6b connected to the output shaft 12c also immediately stop. Loading and unloading comparers 3a, 3b, 6
When the sizing cutting operation is completed in the dark while the sardines a and 6b are at rest, the rotation of the output koji 9a of the first electromagnetic clutch brake 9 connected to the input shaft 12a on one side of the sardine drive mechanism 12 is stopped. As a result, the rotation of the input shaft 11a of the differential drive mechanism 12 is stopped, and a speed difference is again generated between the input shaft 11a of the differential drive mechanism 12 and the input shaft 12b on the other side. and unloading conveyors-3a, 3b, 6a,
6b will be driven at the original conveyance speed. Further, the second electromagnetic clutch/brake 11 is switched from being connected to the clutch side to being connected to the brake side at the time when the sizing cutting operation ends, and the output shaft 11b is braked, so that the output shaft 11b is braked. At the time of sizing cutting such as edge cutting and leading edge cutting, the continuous conveyance operation by the carry-in and carry-out comparers 3a, 3b, 6a, and 6b can be safely repeated. In this embodiment, the sizing cutting signal and the sizing cutting preliminary signal are outputted from the sizing cutting control circuit 15 of the cutting controller 16. A veneer detector consisting of a limit switch, a photoelectric switch, etc. is separated from the cutting position on 6b to the loading side or unloading side by a distance corresponding to the length of the sizing and a distance corresponding to the length of the sizing cutting preliminary signal should be output. Of course, they may be arranged in series and controlled. As described above, the double-sided receiving blade 1 is formed at a right angle or at an angle close to a right angle,
The cutting blade 4a for front cutting and the cutting blade 4b for back cutting, which are arranged at a right angle or close to a right angle with the ridge line of the double-sided receiving blade 1 across the loading path of the veneer 2, are alternately maneuvered and brought in. By organically linking the second electromagnetic clutch brake 11 and the differential drive mechanism 12 to the first electromagnetic clutch brake 9 that intermittently drives the respective cutting blades 4a and 4b of the continuous cutting machine configured to In the case of leading edge cutting and trailing edge cutting of the continuous cutting machine, only the first electromagnetic clutch brake 9 is operated to perform the cutting operation while continuous conveyance is being carried out, and in the case of fixed size cutting, the first electromagnetic clutch is operated. The second electromagnetic clutch brake 11 and the differential drive mechanism 12 are operated in conjunction with the cutting operation of the respective cutting blades 4a, 4b by the brake 9, and the conveyance operation of the veneer 2 is automatically stopped and controlled. This eliminates the problem of unnecessary cutting and separation of the effective part of the veneer 2, which conventionally occurred when cutting to size, and also mechanically synchronizes the operation of the knife with the loading and unloading comparer 3.
Since the pause operation of a, 3b, 6a, and 6b is automatically performed, there is no fear that the cutting blades 4a and 4b will jam the veneer 2 due to the cutting, and high-speed response can be provided. In addition, since the clutch and brake of the second electromagnetic clutch/brake 11' are always switched while both the input shaft 11a and the output shaft 11b are stopped, the friction plates may wear out due to slips during rotation, etc. This invention is functionally extremely stable with almost no problems, and is a remarkable invention that has been able to completely eliminate the problems of conventional devices.

Simple mystery period of drawings The figure is a side view showing an example of implementation of the present invention.

Claims (1)

[Claims] 1. Forming the double-sided receiving blade at a right angle or an angle close to a right angle, erecting and fixing the ridge line of the double-sided receiving blade facing the veneer loading path, and In a continuous veneer cutting machine, the cutting blade for front cutting and the cutting blade for back cutting, which face each other at a right angle or at an angle close to a right angle across the board carrying path, are configured to be able to be advanced and retracted alternately. Connecting the output shaft of a first electromagnetic clutch brake to the drive shaft of a crank connected to the cutting blade so that the cutting blade can be advanced and retracted alternately, and connecting a motor to the input shaft of the first electromagnetic clutch brake; Further, the input shaft of another second electromagnetic clutch brake is connected to the output shaft of the first electromagnetic clutch brake, and the input shaft of one side of the differential drive mechanism is connected to the output shaft of the second electromagnetic clutch brake. Further, the input shaft of the first electromagnetic clutch brake is connected to the input shaft of the other side of the differential drive mechanism, and the drive shaft of the loading and unloading conveyor is connected to the output shaft of the differential drive mechanism, Further, the detection signals of a plurality of veneer detectors arranged in a row perpendicular to the transport direction on the carrying-in conveyor are transmitted to the sizing cutting control circuit, and the output signals of the sizing cutting control circuit are transmitted to the first veneer detector. A cutting controller is provided which transmits signals to the electromagnetic clutch brake and the sizing cutting control circuit, respectively, and the output signal of the sizing cutting control circuit of the cutting controller causes the first and second
The electromagnetic clutch brake of the veneer is controlled intermittently, and the conveying operation of the loading and unloading conveyors can be automatically stopped each time in synchronization with the sizing cutting operation of the veneer continuous cutting machine. Conveyance drive device for continuous veneer cutting machine.