JPH0626865B2 - Continuous operation control device for automatic bag making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a bottom seal that intermittently transfers a bag-making material, seals the bag-making material in a stopped state, and automatically cuts the bag to continuously make a bag. To a control device for an automatic bag making machine of a mold.

(Prior Art) Conventionally, a bottom-seal type automatic bag-making machine generally has a sealer for sealing the intermittently transferred bag-making material and a cutter for cutting the bag-making material after completion of the sealing. The cutter and the cutter are driven by the same seal cutting motor, and the bag-making material is transferred by a transfer motor provided separately from the seal cutting motor.

In the above-mentioned conventional automatic bag-making machine, when the sealing operation and the cutting operation are completed, the seal-cutting motor is stopped, and then the transfer motor is activated to transfer the bag-making material, thereby performing bag-making by the intermittent control by the timer. It is a thing.

(Problems to be Solved by the Invention) In the above-described conventional automatic bag-making machine, the transfer motor is started in a state in which the seal-cutting motor is stopped, and the bag-making material is transferred in a predetermined length and stopped to seal the bag-making material. The bag is made by intermittent control by driving the cutting motor and operating the sealer and cutter, so the actual timing of sealing and cutting the bag-making material is at a time when the bag-making material is stopped. Therefore, there is a problem that the productivity of bag making is low.

Therefore, in the present invention, the seal-cutting servomotor is continuously rotated, the sealing device and the cutter device are continuously driven, and the bag-making material is transferred at a period other than the seal timing and the cut timing, and the bag-making material is stopped. The technical problem to be solved is to improve the productivity of bag making by controlling the sealing and cutting in accordance with the timing.

(Means for Solving the Problem) The technical means for solving the above-mentioned problems are a sealing device for sealing the bag-making material in the process of transferring the bag-making material, and a cutter device for cutting the bag-making material after completion of the sealing. And driving the sealing device and the cutter device with the same seal cutting servo motor, and intermittently transferring the bag-making material by a transfer servo motor provided separately from the seal cutting servo motor. The continuous operation control device for the bottom-seal type automatic bag-making machine configured as described above continuously rotates the seal-cutting servomotor to continuously drive the sealing device and the cutter device and seal the bag-making material. The bag-making material is driven by driving the transfer servomotor during a period other than the sealing timing and the cut-timing for cutting the bag-making material. Is intermittently transferred, and a control means for controlling so as to seal and cut at the timing when the bag-making material is stopped is provided.

(Operation) According to the continuous operation control device for the automatic bag making machine having the above-mentioned configuration, the control means continuously rotates the seal cutting servomotor to continuously drive the sealing device and the cutter device, and at the same time, changes the bag making material. The bag-making material is intermittently transferred by a preset feed amount by driving the transfer servomotor during a period other than the sealing timing for sealing and the cut-time for cutting the bag-making material, according to the timing when the bag-making material is stopped. Seal and cut.

By performing the control as described above, the sealing operation and the cutting operation by the sealing device and the cutter device are performed immediately after the transfer of the bag-making material is stopped. Productivity can be improved.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a bottom seal type in which a double sheet-shaped bag-making material M in which a cylindrical long synthetic resin film is flatly folded is intermittently transferred in parallel in two rows, and sealed and cut at predetermined intervals. FIG. 3 is a front view of a double-row automatic bag making machine 1 for manufacturing the bag body of FIG.

As shown in FIG. 1, at the upper end of the frame 32, passages 33 through which the two rows of bag-making material M pass in parallel are formed from the rear end to the front end of the frame 32. The tension is adjusted by a pair of feeding mechanisms (not shown) and the feeding mechanism is fed into the passage 33. Each bag-making material M fed into the passage 33 advances in sliding contact with the upper surface of the conveyor 9 installed in the center of the upper end of the frame 32 so as to be able to circulate, and further moves in the vertical direction to the upper front of the conveyor 9. It is hooked in an inverted V shape on a length adjusting roller 35 which is horizontally mounted so as to be adjustable, advances to the front end of the passage 33, and is forwarded by a carrying-out mechanism (not shown).

A controller 200 having a built-in microcomputer for controlling various operations of the entire automatic bag making machine 1 is installed near the frame 32, and three servo motor drivers 201, 202, 203 are connected to the controller 200.

Above the rear portion of the frame 32, there are first and second mark detection sensors 209 for detecting marks, patterns, etc., which are marked on the bag-making material M at regular intervals in correspondence with the bag length of the bag body to be manufactured. 210 is installed close to the passage 33, and a detection signal is input to the controller 200 every time a mark or the like passes directly under both mark detection sensors 209, 210.

A feed 1 servomotor 91 and a feed 2 servomotor 92, which can be speed-shifted by a command signal from the controller 200, are arranged side by side in the front and rear of the frame 32, and the encoders 20 are respectively provided in the motors 91 and 92.
4,205 are attached. The motor 91 is based on the one-time feed length of the bag-making material M input in advance to the controller 200, the detection signal of the first mark detection sensor 209, and the output signal of the encoder 204.
The gear shift control is performed in accordance with the gear shift command signal output by, and the rotation is intermittently driven. The motor 92 also feeds the bag-making material M once fed into the controller 200 in advance, the detection signal of the second mark detection sensor 210, and the encoder 2.
The shift control is performed according to the shift command signal output from the controller 200 on the basis of the output signal of 05, and the rotation is intermittently driven.

Above the motors 91 and 92, the first feed roll drive shaft 13 and the second feed roll drive shaft 14 are provided with the passage 33.
It is laid horizontally and in parallel along the width direction.

At the upper end of the front part of the frame 32, a pair of upper and lower first feed rolls 6, 6 are rotatably provided above the second feed roll drive shaft 14 and have a length of about 1/2 of the passage. A pair of upper and lower feeding rolls 25 and 25 rotatably placed in front of both the first feed rolls 6 and 6, and a large number of pairs of the first feed rolls 6 and 6 and the feeding rolls 25 and 25. A first feeding mechanism 36 having spring belts 26, 26 is installed for intermittently feeding the first bag-making material M, and a second feeding mechanism having a similar configuration to the side of the first feeding mechanism 36. And the second bag-making material M is provided.
Intermittently.

The output rotation of the motor 91 is transmitted to the first feed roll drive shaft 13 via the pulley and the belt, and the rotation of the first feed roll drive shaft 13 is transmitted to the lower first feed roll 6 via the pulley and the belt. Then, the first feeding mechanism 36 is driven. Similarly, the output rotation of the motor 92 drives the second feeding mechanism.

A servo motor 93 capable of gear shift control by a command signal from the controller 200 is installed in the lower rear portion of the frame 32, and an encoder 206 is attached to the motor 93. A seal reduction gear 5 provided with a clutch 214 and a brake 17 is provided on a side of a connecting shaft 41 directly connected to an output shaft of a motor 93 via a coupling 18, and a brake 1.
6 and a reducer 4 for a cutter (cutter device) having a clutch 215 attached on both sides, and rotation of the connecting shaft 41 is transmitted to both reducers 4, 5 via a pulley and a belt. There is.

Above the sealing speed reducer 5, a sealing drive shaft 15 through which the output rotation of the sealing speed reducer 5 is transmitted via a sprocket wheel 27 and a chain is rotatably provided horizontally. A sensor operation piece having a protrusion is attached to one end of the sensor so as to face a sensor 211 for detecting an upper end position, which will be described later.

Next, the seal device S will be described. The frame 32
Of the pair of front and rear cam shafts 42, 42, which are rotatably laid laterally near the center of the upper end of the shaft and through which the rotation of the sealing drive shaft 15 is transmitted via a sprocket wheel and a chain. 10 are fitted, and the respective sealing cams 10 are provided with rollers 10a arranged at even eccentric positions.

A pair of right and left laterally long elevating plates 43 are attached to both side surfaces near the center of the upper end of the frame 32 so as to be vertically movable.
Horizontally elongated guide holes, into which the rollers 10a of the sealing cam 10 are fitted, are formed at the front and rear ends of both the elevating plates 43. The rail 43b is horizontally attached, and the lifting plate 43 is synchronously repeatedly moved up and down by the rotation of the sealing drive shaft 15 to repeatedly move the sealing mechanism 23 up and down.

In order to weld the upper and lower films of the bag-making material M linearly along the width direction at predetermined intervals, the sealing mechanism 2 is provided above the vicinity of the central portion of the frame 32 along the width direction of the passage 33.
In FIG. 3, shaft portions are formed at the left and right ends of the seal bar holder 55 installed on the upper portion thereof, respectively.
The seal bar holder 55 is connected to both bearings so as to be able to move up and down together with the repeated up and down movements of 3, and is supported in a cantilever manner.

Below the seal bar holder 55, a seal bar 8 for heat sealing attached to the lower surface of the seal bar holder 55 via a bracket 56 is installed horizontally along the width direction of the passage 33. At the lower end of 8, a seal portion 8a is formed in a sharp shape.

Below the sealing mechanism 23, when the seal bar 8 descends to the sealing position near the bottom dead center, the bag-making material M is nipped between the seal bar 8 and the bag-making material M to escape downward. In order to prevent it, a pedestal 24 is installed horizontally above the upper part of the frame below the upper part of the conveyor 9, and the sealing cam 10 is installed.
Seal bar holder 5 when is rotated once from top dead center
5 and the seal bar 8 together with the bearings 52, the top dead center is lowered and raised once, and a part of the bag-making material M is sealed between the seal bar 8 and the pedestal 24.

The seal bar 8 performs an ascending / descending operation of descending from the top dead center to the seal position near the bottom dead center and again rising to the top dead center each time the sealing cam 10 makes one rotation.

Next, the cutter device C will be described. The clutch 215 is directly connected to the output shaft of the blade reducer 4 and is connected to the clutch 215.
The blade cam 11 is fitted on the blade driving shaft 29 that is driven to rotate during excitation.

The blade cam 11 is movably linked to a lower piece 12a of a pair of left and right swing levers 12 that are pivotally supported in front of the blade drive shaft 29 through a connecting rod 63. There is.

A fixed blade 62 is installed at a front end on the frame 32 and slightly in front of the both feeding mechanisms 36, and at the front end of the frame 32, in cooperation with the fixed blade 62, the bag-making material M is cut at predetermined intervals. A movable knife 7 that is opposed to the fixed knife 62 is vertically movable. The upper end of a connecting rod 64 that is connected to the front pieces 12b of the two rocking levers 12 is connected to the left and right ends of the movable knife 7. Then, every time the blade cam 11 rotates, the movable blade 7 moves up and down in synchronization with the mode in which the seal bar 8 moves up and down, and the bag-making material M is cut.

Next, the control device of the automatic bag making machine 1 will be described.

FIG. 2 is a control block diagram of the control device of the automatic bag making machine 1 according to the present invention.

The automatic bag making machine 1 is bag-controlled by a controller 200 equipped with a microcomputer. An operation panel 100 provided with various operation tools (not shown) necessary for bag making operation is electrically connected to the controller 200. Further, servo motor drivers 201, 202, 203 for outputting drive power are connected to the feed 1 servo motor 91, feed 2 servo motor 92, and seal cutting servo motor 93, respectively, and further feed 1 servo motor 91, The encoders 204, 205, and 206 that output signals corresponding to the respective rotation speeds of the feed 2 servo motor 92, the seal cutting servo motor 92, and the seal cutting servo motor 93 are the controller 2
Connected to 00.

Further, as a sensor for controlling the automatic bag making machine 1, two rows of bag-making materials M are detected, and material detection sensors 207 and 208 for outputting the detection signals, and two rows of bag-making materials M are printed. Detects marks or patterns,
Mark detection sensors 209, 2 that output the detection signal
10 and a seal device upper end sensor 2 that outputs a position signal when the seal bar 8 of the seal device is located at the upper end.
11 and the fact that the cutter device is located at the upper end,
Cutter device upper end sensor 21 that outputs the detection signal
2 are used, and the respective sensors are electrically connected to the controller 200.

On the other hand, the controller 2 controls the seal device clutch 214, the cutter device clutch 215, and the seal device brake 17 and the cutter device brake 16 so that they are activated by signals output from the controller 200.
00 electrically connected. The sealing device clutch 214 and the brake 17, and the cutter device clutch 2
When the clutch signal is output from the controller 200, the servo motor 93 for seal cutting and the brake motor 15 and the brake 16 are provided.
While the seal device S and the cutter device C are connected to each other, when the clutch signal is cut off, the above respective connections are released and the brake is applied.

Next, the controller 200 causes the seal cutting servomotor 93 to continuously rotate to continuously drive the sealing device S and the cutter device C, and transfers the bag-making material M during a period not in the sealed state or the cut state, A control for improving the bag-making productivity by sealing and cutting the bag-making material M at the timing when the bag-making material M is stopped will be described.

The seal cut servo motor 93 rotates when a drive signal from the controller 200 is output to the servo motor driver 203, and when the seal cut motor 93 rotates, as described above, the seal speed reducer 5, the sprocket. The sealing drive shaft 15 is rotated via the wheel 27 and the chain. Then, the sealing drive shaft 15
The sealing cam 10 is rotated along with the rotation. In the process in which the sealing cam 10 makes one rotation, the controller 200 moves the sealing cam 10 to A1 (170 degrees), A2 (60 degrees), A3 (70 degrees), as shown in FIG.
And A4 (60 degrees) are rotated at different speeds for each rotation angle. Since the rotation speed is changed in the process in which the sealing cam 10 makes one rotation, for example, the rotational position of the sealing cam 10 when the sealing bar 8 that moves up and down with the rotation of the sealing drive shaft 15 is at the upper end position is used as a reference. And The output signal of the sensor 211 for detecting the upper end position is used as the rotation reference position signal of the sealing cam 10. And
When a signal from the sensor 211 is input to the controller 200 while the motor 93 is rotating, the controller 200 recognizes that the seal bar 8 is at the upper end position and the sealing cam 10 is at the rotation reference position. Recognize that there is, then the servo motor 9 for seal cut
The rotation angle of the sealing cam 10 is calculated and recognized by counting the pulse signals sequentially output from the encoder 203 attached to the encoder 3.

The rotation section A1 of the sealing cam 10 corresponds to a period in which the seal bar 8 rises from the intermediate position to the upper end position (top dead center) and descends to the intermediate position again, and the bag-making material M is transferred during this period. In the rotation section A2 of the sealing cam 10, the seal bar 8 is lowered from the intermediate position to the sealing position immediately after the transfer of the bag-making material M is stopped. Further, in the rotation section A3 of the sealing cam 10, the seal bar 8 is driven at a low speed, and the bag-making material M is sealed and cut during this period. Further, the rotation section A4 of the sealing cam 10 raises the seal bar 8 from the sealing position to the intermediate position.

The rotation speed of the sealing cam 10 in the rotation section A1 is high, the rotation speed in the rotation sections A2, A4 is intermediate, and the rotation section A3 is low. The intermediate speed is set to an average speed of the rotation speed of the sealing cam 10 in the rotation section A1 and the rotation speed of the rotation section A3.

FIG. 4 (A) shows a pattern of the feed rate when the bag making material M is transferred by driving the first transfer servo motor 91 and the second transfer servo motor 92, and a seal is shown. When the bar 8 is at the intermediate position, the first transfer servomotor 91 and the second transfer servomotor 92 are activated, and when the seal bar 8 moves up to the upper end position (top dead center) and moves down to the intermediate position again, Indicates that it will be stopped. Further, FIG. 4 (B) shows that the sealing cam 10 is
Servo motor 9 for seal cutting in the process of rotating
3 is a pattern of the gear shift state. As shown in FIG. 4 (B), the rotation section A1 of the sealing cam 10
Since the rotation speed in is the fastest, the rotation speed in the rotation sections A2 and A4 is an intermediate speed, and the rotation section A3 is the sealing speed, the rotation speed is low. The timings of the upper end and the lower end indicate the vertical position of the seal bar 8.

By performing the control as described above, the servo motor 93 for seal cutting is continuously rotated, the sealing device S and the cutter device C are continuously driven, and the bag-making material M is
By intermittently driving the bag-making material M by a preset feed amount by driving the first and second transfer servomotors 91 and 92 at a timing other than the sealing timing for sealing the bag-making material and the cut timing for cutting the bag-making material M. The bag-making material M is transferred and sealed and cut at the timing when the bag-making material M is stopped. Therefore, since the sealing operation and the cutting operation by the sealing device S and the cutter device C are performed immediately after the transfer of the bag-making material M is stopped, there is no time delay in each operation, and the bag-making productivity is improved. You can

(Effect of the invention) As described above, according to the present invention, the seal-cutting servomotor is continuously rotated to continuously drive the seal device and the cutter device, and the bag-making material is supplied at a period other than the seal timing and the cut timing. Since the bags are transferred and sealed and cut at the timing when the bag-making material is stopped, the delays in the sealing and cutting operations are extremely small compared to the intermittent control by the conventional timer. There is an effect that there is almost no time delay and the productivity of bag making can be improved.

[Brief description of drawings]

FIG. 1 is a front view of an automatic bag-making machine, FIG. 2 is a block diagram of a control device for the automatic bag-making machine, and FIGS. 3 and 4 are operation explanatory views. 1: Automatic bag making machine 91: Feed 1 servo motor 92: Feed 2 servo motor 93: Seal cut servo motor 200: Controller 201: Servo motor driver 202: Servo motor driver 203: Servo motor driver 204: Encoder 205: Encoder 206 : Encoder

Claims (1)

[Claims] 1. A sealing device for sealing the bag-making material in the process of transferring the bag-making material, and a cutter device for cutting the bag-making material after completion of the sealing, wherein the sealing device and the cutter device are the same. Continuous operation control of a bottom-seal type automatic bag-making machine configured to be driven by a seal-cutting servo motor and configured to intermittently transfer the bag-making material by a transfer servomotor provided separately from the seal-cutting servo motor. A device, wherein the seal cutting servomotor is continuously rotated, the sealing device and the cutter device are continuously driven, and the sealing timing for sealing the bag-making material and the cutting timing for cutting the bag-making material. The bag-making material is intermittently transferred by driving the transfer servo motor during a period other than A continuous operation control device for an automatic bag-making machine, comprising control means for controlling to seal and cut the bag-making material in accordance with the mingling.