JPH0427000B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cutting device for cutting a web wound into a roll while unwinding it to form a sheet.

[Conventional technology]

The cutting device uses a slitter to cut the web into a predetermined cutting width while unwinding the rolled web, then cuts it into a predetermined length with a cutter, and stacks the resulting sheets in a stacking device. There is. With this cutting machine, when the remaining amount of a roll becomes low during cutting, a web in a different roll form is pulled out and joined by the joining device, so that the web can be cut continuously without stopping the cutting line. will be held.
If the two joined webs are of different types, the sheet size is usually changed.

In addition, Japanese Patent Application Laid-Open No. 160892, 1972,
Publication No. 22178, Japanese Patent Application Laid-open No. 51-51084, Japanese Patent Application Publication No. 1972
-36379, Japanese Patent Application Laid-Open No. 52-36380, etc.
A technology for controlling sheet cutting at fixed length and fixed position is disclosed.

[Problem that the invention seeks to solve]

In the conventional cutting equipment mentioned above, when changing the cutting width and cutting length, the operator controls the slitter and cutter by checking the joining of the two types of webs and then operating the production control device. . For this reason, there was a problem in that it took time to change the cutting width and cutting length. Further, the sheets cut during this change are of incorrect size and are defective, resulting in a lower yield.

[Means for solving problems]

In order to solve the above problems, the present invention detects the position of the joint between the first web being cut and the second web to be cut next, and detects the position of the joint between the first web being cut and the second web to be cut next, and Just before entering the cutter, change the cutting width of the slitter, and before the joint enters the cutter,
The cutting length of the cutter can be changed.

Tracking of the position of the joint can be performed by using a rotary encoder placed on the cutting line and a counter that counts pulses output from the rotary encoder. Alternatively, a notcher is provided near the welding device, a hole is made at the end of the web to indicate the joining position, and a sensor for detecting this hole is provided near the slitter and cutter, and these sensors detect the hole. At that time, the cutting width or cutting length may be changed.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

〔Example〕

In FIG. 1, a first roll 10 and a second roll 11 are loaded, and in the illustrated state, the web 10a of the first roll 10 is being cut while being rewound. The pull-out roller 12 is designed to nip and pull out the web 10a at the beginning of unwinding. When the cutting of the first roll 10 is almost completed, the pull-out roller 13 is started and the second roll 10 is cut.
The tip of the web 11a of the roll 11 is pulled out and sent to the joining device 14, and the two webs 10a and 11
Join a. These pull-out rollers 12,1
3 is controlled by drive units 15 and 16 so as to release and stop the nip when the welding is completed.

The operation of the joining device 14 is controlled by a joining control device 17, and as is well known, adhesive tape or the like is used to connect the vicinity of the rear end of the web 10a to the vicinity of the leading end of another web 11a. Join. A pair of conveyance rollers 18 is arranged at the entrance of this joining device 14.

As is well known, the curl correction device 20 has correction rollers arranged in a staggered manner, and the curl is corrected by the web passing between these correction rollers. This curl correction amount is set by the wind curl correction control device 21.

The web 10a being cut is nipped by a pair of length measuring rollers 22, so the web 10a
When the length measuring roller 22 is transferred, the length measuring roller 22 rotates accordingly. In conjunction with this length measuring roller 22, the first
The rotary encoder 23 rotates, and every time it rotates by a certain amount, it generates a pulse, which is sent to the sending and tracking device 24.

As is well known, the slitter 25 is composed of an upper blade 25a and a lower blade 25b, and rotates while the web 10a is being transported to cut it into a predetermined width. These upper blades 25a and lower blades 25b are moved in the width direction of the web 10a by the slitter control device 27.
The cutting width can be changed to a desired value.

As is well known, the cutter 28 includes an upper blade 28a and a lower blade 28b, and cuts the web 10a cut into a predetermined width into a predetermined length. This cutter 2
8 can change its cutting length to a desired value using the cutter control device 30.

The web 10a is cut by a cutter 28 and processed into sheets of a predetermined size. This sheet 10b is conveyed to the position of the first gate 32 by the first conveyor belt 31. In order to track the position of the sheet 10b on the first conveyor belt 31, a second rotary encoder 33 that rotates following the first conveyor belt 31 is provided, and the generated pulses are sent to the stacking section tracking device 34. send to Further, when the first gate 32 is displaced to the position indicated by the two-dot chain line, the seat 10b
is sent to the defective product accumulation section 35 as a defective product sheet. Some of these defective sheets include joints joined by the joining device 14, and others include defective parts such as holes and irregularities.

A non-defective sheet that has no defective parts and has been cut to a predetermined size is sent to the second conveyor belt 37 through the first gate 32 which is in the lowered position shown by the solid line. In order to detect the transport position of the non-defective sheet by the second transport belt 37, the second transport belt 37
A third rotary encoder 38 rotates in conjunction with
is provided. A second gate 39 is arranged behind the second conveyor belt 37, and when this gate is in the lowered position, it sends the non-defective sheet to the third conveyor belt 40 and places it above the lifter 41 of the first stacking section. pile up. Further, when the second gate 39 is in the raised position, the non-defective sheet is transferred to the fourth conveyor belt 4.
2, the lifter 43 of the second accumulation section
are piled up. These lifters 41 and 43 are
Once a certain number of non-defective sheets are stacked, they are sent as is to a well-known packaging process (not shown).

The gates 32 and 39 are operated by a gate driving unit 44, and are displaced between a lowered position shown by a solid line and a raised position shown by a two-dot chain line, thereby changing the sheet transport direction. This gate driving section 44 is controlled by the integrated section tracking device 34 .

The amount of web curl correction, cutting width, and cutting width are as follows:
Although the change depends on the type of web, if this change is made when the leading edge of a new web, that is, the joint, enters each processing step, the length of the defective sheet can be reduced and the yield can be improved. can be improved. Therefore, a feed-out tracking device 24 is provided in order to detect just before the joining portion enters each process, and this feed-out tracking device 24 changes the conditions of each processing step. Further, a stacking section tracking device 34 is provided for sorting defective sheets and non-defective sheets by the first gate 32 and switching the stacking section for good sheets by the second gate 39.

The production control device 45 is operated by an operator, and information about the web to be cut next is input. That is, the length of the second coil 11, curl correction conditions, cutting width, cutting length, and its accumulation location are input. Among these, the length of the second coil 11, curl correction conditions, cutting width, and cutting length are sent to the delivery tracking device 24 via the communication line 46. The remaining collection locations are sent to the collection tracking device 34 via the communication line 47.

FIG. 2 is a functional block diagram of the delivery tracking device. Various data from the production control device 45 are sent to each section via a communication control circuit 50. Among these data, the roll length is stored in the memory 51, and this memory 51 includes a memory section 51a that stores the roll length during cutting;
Memory section 51 that stores the length of the roll to be cut next
b. When the splicing control device 17 outputs a splicing completion signal indicating that the welding of the webs is completed, the roll length stored in the memory section 51a is written into the remaining amount counter 52. At the same time, the next roll length stored in the memory section 51b is written to the memory section 51a. Then, the new roll length from the communication control circuit 50 is written into the memory section 51b.

The remaining amount counter 52 is a subtraction counter,
The roll length is preset by the welding completion signal, and the first
Subtract with pulses from rotary encoder 23,
The remaining amount of the first roll 10 during cutting is detected. When the remaining amount of this first roll 10 decreases and reaches a certain value, the coil delivery controller 53
send commands to. This coil sending roller 53 is
In order to send out the second roll 11, the pull-out roller 13 is started via the drive unit 16. After the leading end of the new web 11a is joined to the web 10a, the pull-out roller 13 releases the nip of the web 11a and stops its rotation.

The bonding completion signal output from the bonding control device 17 is sent to the production control device 45 via the communication control circuit 50, and is also sent to the flip-flop 55.
and the memory 56. When this flip-flop 55 is set by the bonding completion signal,
To open the AND circuit 57, a pulse from the first rotary encoder 23 is input to the counter 58. This counter 58 tracks the joint and outputs a timing signal just before the joint enters each processing step. That is, since the distances between the position of the bonding device 14 and each processing step are known in advance, each timing signal is generated when the count value corresponding to these distances is reached. First, when the curl correction timing signal is generated, the correction amount of the curl correction device 20 is changed, then when the slit timing signal is generated, the cutting width of the slitter 25 is changed, and then when the cutter timing signal is generated, the cutting width of the slitter 25 is changed. , the cutting length of the cutter 28 is changed, and finally the reset signal is sent to the flip-flop 55.
is sent to reset this.

The memory 56 stores information about the first roll 10 during cutting.
It consists of a memory section 56a that stores the sheet size of the second roll 11 to be cut next, and a memory 56b that stores the sheet size of the second roll 11 to be cut next, and the sheet sizes stored in these are sequentially sent to the sheet size change decoder 59. . The sheet size change decoder 59 generates a correction amount command, a slit width command, and a cut width command in accordance with the inputted current sheet size.

When the cutter control device 30 operates the cutter 28 to cut the web, it sends a cut signal to the sheet number counter 61 . This number counter 61
stores the scheduled number of sheets to be cut from the communication control circuit 50, and when the integrated value of the cut signal reaches the scheduled number of sheets, it sends a cutting end signal to the sheet size change decoder 59 to stop cutting. In addition, in normal cutting, the cutting signal is counted and used as the number of non-defective products, and a non-defective product cut signal is generated every time a cut signal is input.

A defect detection sensor 62 is provided close to the cutter 28, and sends a defect detection signal to the sheet number counter 61 when a defect mark 63 is detected. This defect mark 63 is inspected using a surface inspection device before the web is wound into a roll, and when it is determined that there is a defective part 64, the defect mark 63 is an extension of the defective part 64 at the end of the web. recorded in The defect detection signal is sent to the sheet number counter 61, and when a sheet including the defective portion is cut, a defective product cut signal is outputted and counted. Furthermore, when the size change is started, a size change cut signal is output at the timing of the first cut.

FIG. 3 shows an example of a stacking section tracking device. The defective product cut signal is continuously output until the next cut signal is generated,
During this time, the AND gate 70 is opened and the pulses from the second rotary encoder 33 are supplied to the counter 71. When the counter 71 counts the number of pulses corresponding to the distance between the cutter 28 and the first gate 32, it sends a signal to the gate drive section 44 to displace the first gate 32 to the raised position.

The size change cut signal is continuously output until the next cut signal is generated, during which time the AND circuit 72 is opened and the pulse from the second rotary encoder 33 is supplied to the counter 73. When the counter 73 counts the number of pulses corresponding to the distance between the cutter 28 and the first gate 32, it sends a signal to the AND circuit 74 to open it. When this AND circuit 74 opens,
The pulses of the third rotary encoder 38 are sent to the counter 75. This counter 75 is the first gate 3
When the number of pulses corresponding to the distance from 2 to the second gate 39 is counted, a signal is sent to the position determining section 76, and the second gate 39 is operated to send the sheet to a pre-designated stacking section.

Since the maximum stacking capacity of the non-defective product stacking section is determined, when the maximum loading capacity is reached, it is necessary to stack the sheets in another stacking section. Therefore, the AND circuit 78 which is opened by the good product cut signal and this AND circuit 78
A counter 79 that counts the pulses passed through the circuit 78, an AND circuit 80 that opens when the counter 79 is moved by the distance between the first gate 32 and the second gate 39, and an AND circuit 80 that is opened while the AND circuit 80 is open. , a counter 81 counts the pulses of the third rotary encoder 38 and detects that the sheet has been fed to the second gate position.
and a counter 82 that subtracts the signal from the counter 81. This counter 82
is connected to the production control device 45 via the communication control circuit 83.
The maximum number of stacked sheets sent from is preset.
Then, the count-up number of the counter 81 is subtracted and counted, and when the content reaches zero, a signal is sent to the position determining section 76 to move the second gate 39 to the opposite position. Note that the counter 71,
73, 75, 79, and 81 are designed to return to zero when they reach a preset value, and then start counting from zero again.

Next, the operation of the above embodiment will be briefly explained. While the first roll 10 is being cut, the web 10a that has been pulled out has its curl corrected by the curl correction device 20, is cut into a predetermined size by the slitter 25, and is then cut into a predetermined size by the cutter 25. At step 28, it is cut into a predetermined size. The sheet processed in this way is transported by the first conveyor belt 31,
After passing through the first gate 32, the second conveyor belt 37
Head through to the second gate 39. When the second gate 39 is in the lowered position, it is sent to the lifter 41 via the third conveyor belt 40. When a predetermined number of sheets are loaded on this lifter 41, the second gate 39 moves to the raised position, and the sheets are sent to another lifter 43 through the fourth conveyor belt.
It will be loaded on top of this. Thereafter, the lifters 41 and 43 are used alternately to stack a predetermined number of sheets thereon. When a predetermined number of sheets are loaded on each lifter 41, 43, they are sent to a packaging process and packaged.

When the defect detection sensor 62 detects a defect mark 63 during cutting of the first roll 10, the sheet number counter 61 generates a defective product cut signal. In this case, the position of the defective sheet is tracked, and when it comes before the first gate 32, the first gate 32 is moved to the raised position and the defective sheet is put into the defective product accumulating section 35.

When the remaining amount of the first roll 10 during cutting reaches a predetermined value, the pull-out roller 13 moves the first roll 1
Nip the web 11a of No. 1 and pull it out,
The tip is sent to the joining device 14. This joining device 14
joins the tip of the web 11a to the web 10a. When this joining is completed, a joining completion signal is sent to the sending tracking circuit 24, and the position of the joined portion is tracked. Note that when the joining completion signal is generated, the pull-out roller 13 releases the nip and stops drawing out the web 11a. After this, the web 11a is transferred to the conveying roller 18.
is continuously drawn out.

When it is detected that the joint has come before the curl correction device 20, the curl correction device 20
is changed to a curl correction amount set in advance according to this new web 11a. Next, when it is detected that the joint is in front of the slitter 25, the slit width of the slitter 25 is changed to a preset slit width. After this, when the joint comes to the position of the cutter 28, the cutting length of the cutter 28 is changed.

When the cutter 28 operates for the first time after the cutting length of the cutter 28 is changed, the sheet number counter 61 outputs a defective product cut signal because there is a joint. When this defective product cut signal is generated, tracking of the sheet including the joint part is started, and when this sheet comes before the first gate 32, the first gate 32 is raised for a certain period of time, and the sheet is placed in the stack of defective products. 35.

When the first cut signal is generated from the cutter control device 30, the sheet number counter 61 generates a size change cut signal. When this first cut sheet passes through the first conveyor belt 31 and the second conveyor belt 37 and comes before the second gate 39, it is placed at the second gate 39 so that it enters the preset stacking section. Determine the position. Thereafter, the sheet number counter 61 generates a non-defective cut signal every time a cut signal is input, and puts the sheet into the designated stacking section as described above.

〔Effect of the invention〕

As described above, according to the present invention, the cutting width and cutting width are automatically changed, which simplifies the work and allows changes to be made in a short time. This reduction in change time reduces the number of sheets cut during change, resulting in improved yield. Furthermore, since the position of the joint is detected and the cutting width or cutting width is changed immediately before the joint enters each process, it is possible to reduce the number of sheets that are defective in size.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a cutting line in which the present invention is implemented. FIG. 2 is a block diagram showing the configuration of the delivery tracking device. FIG. 3 is a block diagram showing the configuration of the accumulation section tracking device. 10...first roll, 10a...web, 11
... second roll, 11a ... web, 14 ... joining device, 20 ... curl correction device, 25 ... slitter, 28 ... cutter, 32 ... first gate, 35 ... defective product accumulation section, 39...Second gate, 41, 43...Lift, 62...Defect detection sensor, 63...Defect mark.

Claims (1)

[Claims] 1. The web is unwound from the coil, cut to a predetermined width by a slitter placed on a cutting line, then cut to a predetermined length by a cutter, and the obtained sheets are stacked by a stacking device. In the cutting device, means for measuring the remaining amount of the first coil during cutting, and means for measuring the remaining amount of the first coil to be cut next when the remaining amount of the first coil reaches a predetermined value. means for joining the starting end of the first coil to the web of the first coil; means for detecting the transfer position of the part joined by the joining means; and a signal from the joining part position detecting means to move the joining part to the slitter. A cutting device comprising control means for changing the cutting width of the slitter before entering the slitter and changing the cutting length of the cutter before the joint enters the cutter. 2. The coil remaining amount detection means includes a rotary encoder that generates a pulse every time the web is transferred a predetermined distance on the cutting line, and a rotary encoder that generates a pulse when the web of the first coil is moved by the second coil when the joining means is activated. 2. The cutting device according to claim 1, further comprising a counter that is preset to a preset numerical value when the web of the second coil is welded, and is subtracted by a pulse from the rotary encoder. 3. The joint position detection means comprises a second counter that starts a counting operation when the joint position is activated and counts pulses from the rotary encoder. cutting equipment. 4. The stacking device includes a gate means for switching the direction of conveyance of the cut sheets to a defective product accumulation section and a non-defective product accumulation section, and the first sheet after changing the cutting length of the cutter is The cutting device according to claim 3, characterized in that the cutting device is adapted to transport the products to a non-defective product accumulation section.