JPH0142775B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for processing a thin plate, and particularly to a method for processing a thin plate by cutting or pressing a thin plate into a predetermined number of pieces.

BACKGROUND ART FIG. 1A shows, for example, a thin plate on which a plurality of clock dials are printed, and the thin plate 10
is a plurality of dial plates 12-1, 12- with the same pattern
2, 12-3,..., and must be divided into each pattern, but the number of patterns is too large for normal final division press processing, so the first
As shown in Figure B, the thin plate 1 is
0 is cut and separated into a predetermined number of pieces by shearing etc.
Small thin plates 14-1, 14-2, 14-3, . . . are produced. That is, as shown in FIG. 1A,
On the surface of the thin plate 10, positioning marks 16-1,
16-2, 16-3, ... are printed, and the cutting lines 18-1, 18- are indicated by dashed lines.
By shearing according to the steps 2, 18-3, . . . , the thin plate 10 is cut and separated into small thin plates 14-1, 14-2, 14-3, . . . as shown in FIG. 1B. And this small thin plate 14-
1, 14-2, 14-3, . . . are pressed into a desired shape by press working, thereby obtaining the final dial plates 12-1, 12-2, 12-3, .

As described above, the thin plate 10 on which pattern printing has been performed is made up of a predetermined number of small thin plates 14-1, 14-2, 1.
4-3,... At this time, the cutting position must be determined correctly according to the printed positioning mark, and if there is a misalignment between the cutting position and the positioning mark, the desired cutting position must be determined. There was a problem that it was not possible to obtain small thin plates. And, as is well known, dial plates 12-1, 12-2, 12-
3,... and positioning marks 16-1, 16-2,
16-3,..., as shown in FIG.
2-1, 12-2, 12-3, ... and positioning marks 16-1, 16-2, 16-3, ... may be misaligned, and if there is such a printing misalignment, or when the thin plate 10 itself is cut out. The printed dial 12-1,
12-2, 12-3,... and positioning mark 16
-1, 16-2, 16-3,... are often significantly deviated in parallelism etc. with respect to the peripheral edge 10a of the thin plate 10, and for this reason, when cutting the thin plate 1
There was a problem in that the peripheral edge 10a of 0 could not be used as a cutting reference.

In response to the above-mentioned problems, conventional processing methods
A method has been adopted in which a hole corresponding to the dial and positioning mark is made in the thin plate 10 and a pin of a cutting device is inserted into the hole for positioning. However, this method requires secondary processing for making the hole etc. However, there were problems in that the workability was poor and the desired cutting position accuracy could not be obtained.

Purpose of the Invention The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide a thin plate processing method that can perform high-precision cutting or pressing at the correct position corresponding to the cutting or pressing position. Our goal is to provide the following.

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a thin plate processing method in which a thin plate is cut or pressed into a predetermined number of pieces, in which a feeding drive is applied separately to both ends of the thin plate, and the cutting or pressing position is moved to the cutting or pressing position. Correspondingly, the positioning marks provided on the thin plate surface are detected separately by sensors at both ends, and both ends of the thin plate are fed separately until each sensor detects the positioning mark, and when both sensors detect the positioning mark, , stop feeding the thin plate, then apply return drive to both ends of the thin plate, return the thin plate a predetermined amount in the opposite direction, and feed the thin plate again in the feeding direction until each sensor detects the positioning mark, and both sensors detect the positioning mark. When a mark is detected, the feeding of the thin plate is stopped and the thin plate is cut or pressed.

Furthermore, the present invention provides a thin plate processing method in which a thin plate is cut or pressed into a predetermined number of pieces, in which a feed drive is applied separately to both ends of the thin plate, and a feed drive is provided on the thin plate surface corresponding to the cutting or pressing position. The positioning mark is detected separately by the sensors at both ends, and both ends of the thin plate are first fed at high speed and then at low speed until each sensor detects the positioning mark. When both sensors detect the positioning mark, the thin plate is Stop feeding, then apply return drive to both ends of the thin plate, move the thin plate back in the opposite direction by a predetermined amount at low speed, and feed the thin plate again at low speed in the feeding direction until each sensor detects the positioning mark. When a positioning mark is detected, the feeding of the thin plate is stopped and the thin plate is cut or pressed.

Embodiments Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIG. 3 shows a thin plate cutting device.

The cutting device includes a supply section 26 that supplies thin plates one by one from a group of laminated thin plates, and a cutting section 28 that cuts the supplied thin plates into a desired shape.
The supply section 26 includes a thin plate lamination rack 30, which includes a bottom plate 32, a left side plate 34 erected and fixed at the left end of the bottom plate 32, and a right side plate 36 erected and fixed at the right end of the bottom plate 32. It consists of and. In order to pull up the thin plate, suction cups 20 and 22 are provided, and the suction cups 20 and 22 are supported and fixed to a suction cup support (not shown). simultaneously move up and down.

In order to temporarily hold the thin plate pulled up by the suction cups 20 and 22, guides 38 and 40 are provided on the left side plate 34 and right side plate 36, respectively, and guides are provided on the left side plate 34 and right side plate 36, respectively. 38, 40 through-holes 34a, 36
a is formed, which allows the guides 38,
40 can protrude inward from the outside of the left side plate 34 and the right side plate 36, and can temporarily hold the thin plate. That is, the left side plate 34, the right side plate 3
6 are provided with air cylinders 42 and 44, respectively, and the air cylinders 42 and 44 allow the guides 38 and 40 to move freely in the directions of arrows C and D and the directions of arrows E and F. When pulling up the thin plate, the guides 38 and 40 retreat in the directions of arrows C and D to enable the thin plate to be pulled up.Afterwards, when the suction cups 20 and 22 drop the thin plate, the guides 38 and 40 move in the direction of the arrows C and D. It moves in the E and F directions and protrudes into the inside of the left side plate 34 and the right side plate 36,
The thin plate is temporarily held by the guides 38 and 40.

In order to supply the thin plate once held by the guides 38 and 40 to the cutting section 28, a drive shaft 46 and a rotation shaft 48 are pivotally supported on the left side plate 34 and the right side plate 36, and the left end 46a of the drive shaft 46, A timing belt 50 is stretched over the left end 48a of the rotating shaft 48, and similarly, the right end 46b of the drive shaft 46 and the rotating shaft 48
A timing belt 52 is stretched over the right end 48b. The timing belts 50, 52 have feeding claws 50a, 52a made of rubber in a part thereof,
Further, a pulse motor 54 for rotationally driving the drive shaft 46 is provided on the right side plate 36, and the drive shaft 46 rotates in the direction of arrow G by driving the pulse motor 54, thereby causing the timing belt to rotate. Since the guides 38 and 52 rotate in the directions of arrows H and I, the feed claws 50a and 52a move the guides 38 and
The thin plate held at 40 can be moved.

In the manner described above, one thin plate is taken out from the group of thin plates stacked on the thin plate stacking rack 30, and this thin plate is supplied to the cutting section 28.

The cutting section 28 includes a base 56, a work holder 58 and a shear 60 are provided behind the base 56, the thin plate moves on a moving surface 56a of the base 56, and is then pressed by the work holder 58, sear 60
It will be disconnected by. Move the thin plate to the surface 56
Parallelizing mechanisms 62 and 64 are provided on the moving surface 56a in order to make the plane approximately parallel to the moving surface 56a.
and air cylinders 70, 72 that move the presser plates 66, 68 in the directions of arrows J and K, and in the directions of arrows L and M.
It consists of and.

Therefore, when the thin plate is located between the parallelizing mechanisms 62 and 64, the thin plate can be parallelized by moving the holding plates 66 and 68 in the directions of arrows J and K to press down the thin plate.

In order to send the thin plate to the work holder 58 and the shear 60, a feed roller 74 and a pulse motor 76 that drives the feed roller 74 are installed on the left side of the moving surface 56a.
Similarly, although not shown, a feed roller 78 and a pulse motor 80 for driving the feed roller 78 are provided on the right side of the moving surface 56a. Further, in order to control the driving of the pulse motors 76, 80, the pulse motors 76, 80 are
A light sensor 82 and a light sensor 84 (not shown) are provided corresponding to the pulse motors 76 and 8.
0 is driven based on detection signals from optical sensors 82 and 84, rotates feed rollers 74 and 78, and feeds the thin plate. That is, as shown in FIG. 1A described above, a positioning mark 16 is printed on the surface of the thin plate 10, and the left end and right end of this positioning mark 16 are connected to an optical sensor 82, respectively.
By detecting at 84, the pulse motor 76,
80 is controlled so that the thin plate 10 is driven toward the shear 60 such that the positioning mark 16 is parallel to the shear 60.

The thin plate cutting device has the above configuration, and the operation of each part will be explained in detail below.

Figures 4A, 4B and 4C show the action of the suction cup and guide.

In FIG. 4A, the guides 38 and 40 are retracted in the directions of arrows C and D, respectively, and in this state, the suction cups 20 and 22 suck the thin plate 10-1 and pull it up in the direction of arrow P. . In FIG. 4B, the suction cups 20, 22 are attached to the thin plate 10-
1 is pulled up to a predetermined position, and at this time, the guides 38, 44 are operated by air cylinders 42, 44.
40 move in the directions of arrows E and F, respectively, and protrude into the inside of the left side plate 36 through the insertion holes 34a and 36a. Then, in FIG. 4C, the suction cup 2
0 and 22 cause the thin plate 10-1 to fall off in the direction of the arrow Q, so that the thin plate 10-1 falls off the guide 38,
It will be temporarily held at 40.

Therefore, the suction cups 20, 22 and the guides 38, 40
As a result, the thin plates 10 are placed one by one on the guides 38 and 40.

5 and 6 show the operation of the timing belt.

In FIG. 5, the timing belt 50 is rotated in the directions of arrows H and I by the rotational drive of the drive shaft 46, while the thin plate 10 is held on the guide 38.
The thin plate 10 is supplied to the base 56 by a. That is, as the timing belt 50 rotates, the feed pawl 50a comes into contact with one end of the thin plate 10, and the timing belt 50 further rotates in the directions of arrows H and I, so that the thin plate 10 is fed in the direction of arrow T by the feed pawl 50a. The Rukoto.

In FIG. 6, since the feed roller 74 rotates in the direction of arrow U, the thin plate 10 is driven to be fed in the direction of arrow T, and is fed toward the shear 60. Note that a lower roller 92 is rotatably provided below the feed roller 74 with a predetermined gap therebetween.
2 is pivotally supported, and the thin plate 10 can be reliably fed and driven by both rollers 74 and 92. Note that the lower roller 92 is a roller that is not actively driven but rotates in accordance with the rotation of the feed roller 74, that is, the feed drive of the thin plate 10.
The feed roller 74 is actively rotationally driven, and the feed roller 74 and the lower roller 92 are preferably made of urethane rubber.

Therefore, due to the timing belts 50 and 52,
The thin plate 10 can be fed to the base 56, and the thin plate 10 can be fed to the shear 6 by the feed roller 74.
It is possible to drive the feed toward zero.

Next, FIGS. 7A, 7B, and 7C show the action of the parallelization mechanism.

In FIG. 7A, timing belts 50, 5
The thin plate 10 fed by 2 may not be parallel to the feeding direction. Therefore, the 7th B
As shown in the figure, by operating the air cylinders 70 and 72, the holding plates 66 and 68 are moved in the directions of arrows J and K, respectively, and the holding plates 66 and 68 press both ends of the thin plate 10, and the thin plate 10 is parallel to the feed direction. Thereafter, as shown in FIG. 7C, the air cylinders 70 and 72 are operated,
The presser plates 66 and 68 are moved in the directions of arrows L and M, respectively.

Therefore, the parallelizing mechanisms 62 and 64 can make the thin plate 10 parallel to the feeding direction.

Next, FIG. 8 shows the appearance of the roller and sensor vicinity, and the base 56 has a motor mounting plate 9.
A pulse motor 76 is fixed to the motor mounting plate 94, and a feed roller 74 is rotatably provided.

and a motor shaft 76a of the pulse motor 76,
A timing belt 96 is stretched around the feed roller 74 , and the timing belt 96 can transmit the rotation of the pulse motor 76 to the feed roller 74 . Note that a guide 98 is installed adjacent to the motor mounting plate 94. Further, in order to detect the positioning mark 16 on the thin plate 10, an optical sensor 82 is provided near the feed roller 74, and based on the detection signal from the optical sensor 82, the pulse motor 76 is driven to move the thin plate 10. Can be driven.

Next, FIG. 9 shows the action of driving the thin plate by the rollers.

If the thin plate 10 is not parallel to the feeding direction as shown by the two-dot chain line in the figure, the sensor 82 first detects the positioning mark 16, so the feeding roller 74 stops; Since the positioning mark 16 has not yet been detected, the feed drive by the feed roller 78 continues. Therefore, the feed drive stops on the left side of the thin plate 10, whereas the feed drive continues on the right side of the thin plate 10, and the thin plate 10 is approximately become parallel.

10A, 10B, and 10C show the action of the feed roller to feed the thin plate 10 in the feeding direction and return it in the opposite direction.

In FIG. 10A, the sheet 10 is fed in the feed direction, first at high speed and then at a slow speed, until the sensor detects the positioning mark, when the sheet 10 is stopped from being fed. Here, the timing for switching from high speed to low speed is set in advance using a timer or the like. The switching timing should be as close to this as possible before the arrival of the positioning mark, but it should not be passed. For this reason, an appropriate value is determined in consideration of the size of the thin plate, the deviation between the positioning mark and the feeding direction, etc., but this value may be determined as appropriate depending on conditions such as the size of the thin plate.

Thereafter, as shown in FIG. 10B, the feed roller 74 is rotated in the direction of arrow V, and the thin plate 10 is returned in the opposite direction by a predetermined amount at a low speed. This return amount may be set using a timer or the like, but it needs to be large enough to eliminate the deviation that remains in the above-mentioned direction correction by driving only one roller. Therefore, this value may be determined depending on the size of the thin plate, etc.

Then, as shown in FIG. 10C, the thin plate 1
0 in the feeding direction at low speed, and when the sensor detects the positioning mark, the feeding of the thin plate 10 is stopped, the work holder 58 presses the thin plate 10, and the shear 6
0 to cut the thin plate 10.

Therefore, in FIG. 10A, since the thin plate 10 is first fed at high speed and then at low speed,
The sensor can detect the positioning mark with high precision, and furthermore, once the sensor has detected the positioning mark, the thin plate is returned by a predetermined amount in the opposite direction.
Since the positioning mark is detected again by the sensor, the thin plate can be fed and driven parallel to the feeding direction, and therefore the cutting position accuracy of the thin plate can be improved.

FIG. 11 shows a flowchart of the thin plate cutting operation described above.

The power is turned on in step 100, initial values are set in step 102, and step 10
In step 4, it is determined whether the start switch is on. If the start switch is on in step 104, the process shifts to the operation of the supply section.

That is, in step 106, the guide 3
8 and 40 open, and in step 108 the suction cup 2
0 and 22 descend to suck the thin plate 10, and in step 110, the suction cups 20 and 22 rise to suck the thin plate 10.
Raise 0. Thereafter, the guides 38, 40 are closed in step 112, the suction cups 20, 22 fall off the sheet 10 in step 114, so that the sheet 10 is held on the guides 38, 40, and the timing belt 5 is removed in step 116.
0,52 is actuated to feed the thin plate 10 to the cutting section.

Then, in step 118, the thin plate 10 is parallelized by the parallelizing mechanisms 62 and 64, in step 120, the thin plate 10 is fed in the feeding direction at high speed until it approaches the positioning mark, and in step 122, the thin plate 10 is fed at low speed until it reaches the positioning mark. When the thin plate 10 is fed in the feeding direction and the positioning mark is detected by the sensors 82 and 84, the feeding of the thin plate 10 is stopped.

Thereafter, in step 124, the thin plate 10 is returned by a predetermined amount (for example, 4 mm) in the reverse direction at low speed, and in step 126, the thin plate 10 is again fed in the feeding direction at low speed to the positioning mark, and then
When the sensors 82 and 84 detect the positioning mark at step 8, shearing of the thin plate 10 is performed. Then, in step 130, it is determined whether shearing has been completed a set number of times,
If the shearing has not been completed the set number of times, the process returns to step 120, whereas if the shearing has been completed the set number of times, the process advances to the next step 132, where the remaining material of the sheet 10 is discharged.

As described above, according to the flowchart of FIG. 11, the cutting action of a thin plate can be easily understood.

According to the flowchart of FIG. 11 mentioned above,
Although the thin plate cutting action can be understood, in order to further deepen the understanding, the thin plate cutting action will be explained based on FIG. 12.

FIG. 12 shows a timing chart for the cutting action of the thin plate.

At time _t1 , the guide opens, and at time _t2 , the suction cup descends to suck the thin plate. Then, at time _t3 , the suction cup rises and pulls up the thin plate, and then the guide closes, and at time _t4 , the suction cup drops off the thin plate, and the thin plate is placed on the guide. The sheet on this guide is fed to the cutting section by means of a timing belt.

At time _t5 , the parallelization mechanism is activated and the thin plate is parallelized. Then, at time _t6 , the feed roller rotates normally, thereby sending the thin plate in the feeding direction. Note that between times _t6 and _t7 , the thin plate is first fed at high speed and then at low speed.
At time _t7 , when the sensor detects the positioning mark on the thin plate, the forward rotation of the feed roller is stopped and the feed roller is rotated in reverse, so that the thin plate is returned in the opposite direction at a low speed. Preset time from time t ₇
At time _t8 , when Tback has elapsed, the feed roller resumes normal rotation, and as a result, the thin plate is again fed at a low speed in the feeding direction. At time _t9 , when the sensor detects the positioning mark, the feed roller stops, so that the sheet is accurately positioned and shearing is performed at this time. Then, at time _t10 , when the shearing ends, the feed roller rotates normally again, and the thin plate is fed and the thin plate is sheared in the same manner.

Therefore, according to the timing chart of FIG. 12, it becomes possible to easily understand the cutting action of the thin plate.

FIG. 13 shows a block circuit according to an embodiment of the invention. Then, the processing method described above is used, that is, the thin plate is first fed at high speed and then at low speed, and then the thin plate is returned at low speed by a predetermined amount in the opposite direction.
The processing method of feeding the thin plate again in the feeding direction at low speed and cutting the thin plate is performed by the block circuit shown in FIG. 13.

In FIG. 13, the left pulse motor 76,
A motor drive circuit 15 is provided to drive the right pulse motor 80, and a block circuit of this motor drive circuit 150 is shown in FIG.

In FIG. 14, a pulse signal 500 from an oscillation circuit 152 is supplied to a first frequency dividing circuit 154 and divided into a predetermined number of pulses.
The high-speed pulse signal 502 from 4 is subjected to a predetermined waveform shaping action in the waveform shaping circuit 156, and then used as a pulse signal for driving the motors 76 and 80 at high speed. Further, the high speed pulse signal 502 from the first frequency dividing circuit 154 is further frequency-divided by the second frequency dividing circuit 158 and converted into a low speed pulse signal 504, and the low speed pulse signal 502 from the second frequency dividing circuit 158 is
04 is subjected to a predetermined waveform shaping action in the waveform shaping circuit 160 and then used as a pulse signal for driving the motors 76 and 80 at low speed.

A speed switching control circuit 162 is provided to switch and control the speeds of the motors 76 and 80, and the speed switching control circuit 162 includes a one shot circuit 164 to which a high speed pulse signal 502 is supplied, a delay circuit 166, and one shot circuit 164. Signal 5 from
06 and the signal 508 from the delay circuit 166, the preset counter 168 counts the number of pulses of the signal 508, and sets the count-up signal 510 to "H" level when a predetermined number of pulses are counted; The circuit includes a flip-flop (hereinafter referred to as FF) 170 which is supplied with a speed control signal 512 and outputs a speed control signal 512, and count number setting means 172 (for example, a keyboard) which sets the count number of the preset counter 168. Then, the high-speed pulse signal 502 is transmitted to the speed switching control circuit 1.
62 for a predetermined period of time, the count-up signal 510 from the preset counter 168 goes to the "H" level, which causes the FF 170 to operate and the speed control signal 512 to go to the "H" level. The speed control signal 512 is inverted and supplied to one end of the AND circuit 174, and the high speed pulse signal 502 is supplied to the other end of the AND circuit 174 via the waveform shaping circuit 156. is supplied to one end of the AND circuit 176, and a low-speed pulse signal 504 is supplied to the other end of the AND circuit 176 via the waveform shaping circuit 160. can be controlled.

That is, in the initial state, the speed control signal 512 is at the "L" level, so the AND circuit 176 is opened and the AND circuit 174 is closed, so that the high-speed pulse signal 502 is output from the AND circuit 174. When the predetermined time has elapsed, the speed control signal 512 switches to the "H" level, so the AND circuit 176 opens and the AND circuit 1
74 is closed, which causes the slow pulse signal 504
will be output from the AND circuit 176.
The signal 514 from the AND circuit 174 and the signal 516 from the AND circuit 176 are supplied to the AND circuit 180 via the OR circuit 178, and the high/low switching signal 518 from the AND circuit 180 is supplied to the motors 76, 80. The speeds of the pulse motors 76 and 80 are switched by the high/low switching signal 518.

Therefore, according to the motor drive circuit 150, the motors 76 and 80 can be driven at high speed initially, and then driven at low speed after a predetermined period of time has elapsed.

That is, first, the speed control signal 512 is "L".
level, the AND circuit 174 opens, and the high-speed pulse signal 502 is output from the AND circuit 174. As a result, the high-low switching signal 518 becomes a high-speed pulse signal. As a result of the operation, the speed control signal 512 becomes "H" level, so the AND circuit 176 is opened and the low speed pulse signal 504 is outputted from the AND circuit 176, whereby the high/low switching signal 518 becomes a low speed pulse signal. Therefore, it is possible to drive the motors 76 and 80 at high speed initially, and then to drive at low speed after a predetermined period of time has elapsed.

Next, in FIG. 13, a left sensor circuit 182L and a right sensor circuit 182R are provided to detect the positioning mark on the thin plate and output a detection signal, and the left sensor circuit 182L includes an optical sensor 82, an amplifier circuit 184L, Color-specific ON level setting circuit 186
Similarly, the right sensor circuit 182R has a light sensor 84, an amplifier circuit 184R, a color-specific ON level setting circuit 186R, an operation circuit 188R, and a differentiation circuit 190R. . A signal 600L from the optical sensor 82 and a signal 60L from the optical sensor 84
0R are amplifier circuits 184L and R, respectively, by color.
ON level setting circuit 186L, R, differentiation circuit 19
A predetermined effect is applied by 0L and R. The position mark detection signal 602L from the left sensor circuit 182L and the position mark detection signal 602R from the right sensor circuit 182R are supplied to the motors 76 and 80 via the left and right motor feed control circuit 192. That is, the left and right motor feed control circuit 192
4,196, and position mark detection signals 602L, 602L and S terminals of FFs 194 and 196 respectively.
602R is supplied, and dynamic/stop switching signals 604L, 604R from the Q terminals of the FFs 194, 196 are supplied to the dynamic/stop terminals of the motors 76, 80, respectively.

Therefore, when the optical sensors 82 and 84 detect the positioning mark when the thin plate is being fed and driven, the position mark detection signals 602L and 602R go to the "H" level, so the motion stop switching signals 604L,
604R goes to the "H" level, and as a result, the driving of the motors 76 and 80 is stopped. Note that after the motors 76 and 80 have stopped driving,
A reversal of the motors 76, 80 (returning the sheet in the opposite direction) or shearing of the sheet is performed.

In the left and right motor feed control circuit 192, the motion stop switching signals 604L and 604R are connected to an AND circuit 198.
The one shot circuit 200 outputs a left and right mark detection signal 606. That is, the optical sensor 8
Only when the positioning marks 2 and 84 detect the positioning mark and the movement/stop switching signals 604L and 604R both go to "H" level, the AND circuit 198 opens and the left and right mark detection signal 606 from the one shot circuit 200 goes to "H" level. ” level. The left and right mark detection signals 606 are used for various operations as described later.

A reverse feed amount setting circuit 202 is provided to reverse the motors 76, 80 and return the thin plate in the opposite direction when the sensor detects a positioning mark. In the reverse feed amount setting circuit 202, the left and right mark detection signals 606 are supplied to the OR circuit 204, and the signal 608 from the OR circuit 204 is supplied to the FF20.
6. Signal 610 from the FF 206
is supplied to the reset terminal of the preset counter 208, and is further inverted and supplied to one end of the AND circuit 210. The other end of the AND circuit 210 receives a signal 516 from the motor drive circuit 150.
(φ ₁ ) is supplied, and the signal from the AND circuit 210 is supplied to the preset counter 208 and used as a counting signal. In addition,
A count number setting means 211 is connected to the preset counter 208 in order to set a count number.

Therefore, when both sensors 82 and 84 detect the positioning mark, the left and right mark detection signals 6
06 becomes "H" level, and signal 608 becomes "H"
level and activates FF206, thereby
The forward/reverse switching signal 610 from the FF 206 becomes "L" level. Therefore, the motors 76 and 80 start rotating in reverse, and at the same time, the preset counter 2
08 becomes ready to start counting, and the AND circuit 210 is opened, so the signal 516 is supplied to the preset counter 208 via the AND circuit 210, and the preset counter 208 calculates the number of pulses of the signal 516, that is, the number of pulses of the thin plate. The amount returned in the opposite direction is counted.

Then, when the preset counter 208 counts a predetermined number of pulses, the count up signal 612 from the preset counter 208 becomes "H" level, and the count up signal 61
2 is supplied to the other end of the OR circuit 204, and a signal 608 from the OR circuit 204 is supplied to the FF 206. Therefore, when the count-up signal 612 becomes "H" level, the FF 206 is activated and the forward/reverse switching signal 610 becomes "H" level, so the motors 76, 80 are switched to forward rotation, i.e. , the thin plate is fed in the feeding direction, and at the same time, the R terminal of the preset counter 208 goes to the "H" level, so the preset counter 2
08 is reset.

Therefore, according to the reverse feed amount setting circuit 202,
First, since the forward/reverse switching signal 610 is at the "H" level, the motors 76 and 80 rotate in the normal direction, that is, the thin plate is sent in the feeding direction, and then when the optical sensors 82 and 84 detect the positioning mark, the motors 76 and 80 rotate in the normal direction. teeth,
Since the left and right mark detection signal 606 becomes "H" level, the FF 206 is activated, and the forward/reverse switching signal 610 becomes "L" level, thereby causing the motors 76,
80 is reversed, ie the lamina is returned in the opposite direction. The amount of reverse rotation of the motors 76, 80, that is, the amount of return of the thin plate in the opposite direction, is counted by a preset counter 208, and when the motors 76, 80 are reversed by a predetermined amount, the count-up signal 612 becomes "H". level, FF2
06 is activated, the forward/reverse switching signal 610 becomes "H" level, and as a result, the motors 76, 80 rotate forward again, that is, the thin plate is sent in the feeding direction again.

Further, a forward/reverse feed number setting circuit 212 is provided to set the number of times the thin plate is returned in the reverse direction. In the forward/reverse feed number setting circuit 212, the left and right mark detection signal 606 is inverted and supplied to the φ terminal of the FF 213, and the D terminal of the FF 213 is supplied with an "H" level signal. FF213
The signal 614 from the Q terminal of
A left and right mark detection signal 606 is supplied to one end of the AND circuit 214, and a left and right mark detection signal 606 is supplied to the other end of the AND circuit 214.
The signal 616 from the AND circuit 214 is supplied to the preset counter 215, and also to the FF 213.
It is inverted and supplied to the R terminal of . Note that a count number setting means 216 is connected to the preset counter 215 in order to set a count number.

Then, when the preset counter 215 counts a preset number, that is, when the thin plate is fed forward/reverse a predetermined number of times, the count up signal 618 from the preset counter 215 becomes "H" level. . For this reason,
Since the shearing signal φ ₂ from the one-shot circuit 218 goes to the "H" level, the processing machine operating circuit 220 is activated, a predetermined shearing action is performed, and the thin plate is cut and separated.

Furthermore, when the optical sensors 82 and 84 detect the positioning mark and the motion stop switching signals 604L and 604R become "H" level and the motors 76 and 80 stop, a motor stop release is performed to release the motor stop. A circuit 222 is provided. In the motor stop release circuit 222, an AND circuit 224
A left and right mark detection signal 606 is supplied to one end of the AND circuit 224, and a signal 6 from the FF 213 in the forward/reverse feed number setting circuit 212 is supplied to the other end of the AND circuit 224.
20 is supplied, and the signal 622 from the AND circuit 224 is supplied to one end of the OR circuit 226. A shearing signal φ ₂ is supplied to the other end of the OR circuit 226 via a not circuit 228 and a one shot circuit 230.
A reset signal 626 from the left and right motor feed control circuit 192 is supplied to the R terminals of the FFs 194 and 196.

Then, the optical sensors 82 and 84 detect the positioning marks, the left and right mark detection signals 606 go to "H" level, and the signal 62 from the FF 213
0 is at “H” level, AND circuit 2
24 opens, the signal 622 becomes "H" level,
As a result, the reset signal 626 becomes "H" level, and the FFs 194 and 196 are reset.
The motors 76, 80 can be reversed. Furthermore, when the shearing signal φ ₂ from the one-shot circuit 218 goes to the "H" level, the signal 624 from the one-shot circuit 230 in the motor stop release circuit 222 goes to the "H" level, and thereby the reset signal 626 goes to the "H" level, the FFs 194 and 196 are reset, and the next feeding drive of the motors 76 and 80, that is, the next feeding of the thin plate, is performed.

The block circuit according to the embodiment of the present invention has the above structure, and its operation will be explained below based on the timing chart of FIG. 15.

The pulse signal 500 from the oscillation circuit 152 is a signal as shown in FIG. 15, and the pulse signal 500 is frequency-divided into a high-speed pulse signal 502 by the first frequency dividing circuit 154. Note that between times _t1 and _t2 , the shearing signal _φ2 is at the "H" level and the thin plate is being sheared, so the high speed pulse signal 502 maintains the "L" level.

At time _t2 , shearing signal _φ2 is “L”
When the level is reached, the high speed pulse signal 502 is output, and the second frequency dividing circuit 158 further outputs the low speed pulse signal 504. High speed pulse signal 502
is supplied to the one-shot circuit 164, thereby causing the signal 506 from the one-shot circuit 164 to
becomes "H" level. Further, the high-speed pulse signal 502 is supplied to the AND circuit 174 via the waveform shaping circuit 156, and at this time, the speed control signal 51
2 is at the "L" level, so the AND circuit 174
is open, the signal 514 has a waveform as shown, and the high/low switching signal 518 becomes a high-speed pulse signal.

Therefore, after time _t2 , the motors 76 and 80 rotate forward at high speed, and the thin plate is thereby fed in the feeding direction at high speed.

Further, the high-speed pulse signal 502 is transmitted to the delay circuit 16
6 and, after a predetermined delay time T ₅₀₈ , is supplied to the preset counter 168. That is, at time _t3 , when a delay time _T508 has elapsed from time _t2 , the preset counter 168 starts counting, and at time _t4 , when a preset time _T510 has elapsed from time _t3 , the preset counter 168 starts counting. The count-up signal 510 from the output terminal becomes "H" level.

At time _t4 , the count-up signal 510 is
Since it is at the "H" level, the speed control signal 512 from the FF 170 is switched to the "H" level. Therefore, AND circuit 174 is closed, while AND circuit 176 is opened, low-speed pulse signal 504 is output from AND circuit 176, and high-low switching signal 518 becomes a low-speed pulse signal.

Therefore, after time _t4 , the motors 76,
Since the rotating shaft 80 rotates normally at a low speed, the thin plate is fed at a low speed in the feeding direction.

At time _t5 , when the optical sensor 82 detects the positioning mark, the signal 600 from the optical sensor 82 is
L becomes "H" level, position mark detection signal 6
02L goes to the "H" level, so the dynamic/stop switching signal 604L from the FF 194 goes to the "H" level. Therefore, the rotation of the motor 76 is stopped, and the stoppage of the motor 76 continues after time _t5 . this time t ₅
Since only the optical sensor 82 detects the positioning mark, the left side of the thin plate is being driven to a predetermined cutting position, whereas the right side of the thin plate is not being driven to a predetermined cutting position. do not have.
Therefore, after time _t5 , the motor 76 stops, while only the motor 80 rotates forward at low speed in order to drive the right side of the thin plate to a predetermined cutting position.
The right side of the thin plate will be fed and driven.

At time _t6 , when the right optical sensor 84 detects the positioning mark, the signal 600R from the optical sensor 84 goes to "H" level, and the position mark detection signal 602R goes to "H" level, so FF1
The dynamic stop switching signal 604R from 96 becomes "H" level. Therefore, the rotation of the motor 80 is stopped, and
Since the feed on the right side of the thin plate stops, the feed on both ends of the thin plate stops. At this time _t6 , both the dynamic stop switching signals 604L and 604R are at the "H" level, so the AND circuit 198 is opened, and therefore the left and right mark detection signal 606 from the one shot circuit 200 is at the "H" level. becomes.

Then, in the AND circuit 224 in the motor stop release circuit 222, the left and right mark detection signal 606
is at the "H" level, and furthermore, the signal 620 is at the "H" level, so the AND circuit 224 is opened, so that the signal 622 becomes the "H" level, and the reset signal 626 becomes the "H" level.
FFs 194 and 196 are reset. In the timing chart of FIG. 15, at time _t7 , the dynamic stop switching signals 604L and 604R become "L" level, and the stoppage of the motors 76 and 80 is released.

Furthermore, at time _t6 , the left and right mark detection signal 606 is at the "H" level, so the signal 60 from the OR circuit 204 in the reverse feed amount setting circuit 202 is
8 becomes the "H" level, and the FF 206 is activated.
Therefore, the forward/reverse switching signal 610 becomes "L" level, the motors 76 and 80 rotate in the reverse direction, and the thin plate is returned in the opposite direction at a low speed. Further, since the forward/reverse switching signal 610 goes to "L" level, the preset counter 208 starts counting, and at time _t8 , when a predetermined time _T612 has elapsed from time _t6 , the count up signal 612 goes to "H" level. level, and the signal 608 becomes "H" level. As a result, the forward/reverse switching signal 610 becomes "H" level again, and the motors 76, 80 rotate forward again at low speed, thereby feeding the thin plate again at low speed in the feeding direction.

At time _t9 , when both optical sensors 82 and 84 detect the positioning mark, signals 600L,
600R becomes "H" level, position mark detection signals 602L, 602R become "H" level,
Therefore, the dynamic stop switching signals 604L, 604R become "H" level, and the rotation of the motors 76, 80 is stopped. Furthermore, dynamic stop switching signals 604L, 60
4R are both at the "H" level, so the left and right mark detection signals 606 are at the "H" level.

In the forward/reverse feed number setting circuit 212, the left and right mark detection signal 606 is at the "H" level, and the signal 614 from the FF 213 is also at the "H" level, so the signal 616 becomes the "H" level. The preset counter 215 is supplied with the preset counter 215. In the block circuit of FIG. 13, the count number of the preset counter 215 is set to 1, so when the signal 616 goes to the "H" level, the count up signal 618 goes to the "H" level, and the one shot circuit The shearing signal φ ₂ from 218 becomes "H" level. Therefore, at time _t9 , the processing machine operating circuit 220 is activated, and the thin plate is cut and separated at a predetermined cutting position. Furthermore, since the shearing signal φ ₂ is at the "H" level, the signal 624 becomes the "H" level in the motor stop release circuit 222, and the reset signal 62 is set at the "H" level.
6 is the "H" level.

At time _t10 , shearing signal _φ2 is “L”
When the level is reached and the shearing of the thin plate is completed,
The reset signal 626 becomes "L" level, and the FFs 194 and 19 in the left and right motor feed control circuit 192
6 is reset. Therefore, the dynamic stop switching signal 6
04L and 604R go to the "L" level, the motors 76 and 80 start rotating again and feed the thin plate at high speed in the feeding direction, and the same operation is performed thereafter.

As described above, according to the timing chart in FIG. 15, from time _t2 to _t4 , the thin plate is fed at high speed in the feeding direction, and from time _t4 to _t5 , _t6 , the thin plate is fed at low speed in the feeding direction. At times t ₅ , t ₆ to _{t 8} , the thin plate is sent back in the opposite direction at a low speed, at times t ₈ to _{t 9} , the thin plate is sent in the feeding direction at a low speed, and at times t ₉ to t ₁₀ , it is understood that the sheets are cut apart at predetermined cutting locations.

Effects of the Invention As explained above, according to the present invention, highly accurate cutting or pressing can be performed at the correct position corresponding to the cutting or pressing position. Therefore, the processing position accuracy of cutting or press working can be improved, and especially when processing a wide thin plate, it has the advantage of being able to eliminate lateral deviation of the thin plate. It becomes possible to speed up the process.

[Brief explanation of drawings]

FIG. 1A is an explanatory diagram showing a thin plate, FIG. 1B is an explanatory diagram showing a state in which the thin plate is cut and separated into small thin plates, FIG. 2 is an explanatory diagram showing positioning marks on the thin plate and misalignment of the dial, and FIG. 4A, 4B and 4C are explanatory diagrams showing the action of the suction cup and the guide. FIGS. 5 and 6 are explanatory diagrams showing the action of the timing belt. 7A, 7B,
Figure 7C is an explanatory diagram showing the action of the parallel alignment mechanism, No. 8
The figure is a perspective view of the appearance of the roller and the vicinity of the sensor, Figure 9 is an explanatory diagram showing the action of driving the thin plate by the roller, and Figures 10A, 10B, and 10C are the actions of the roller to feed the thin plate in the feeding direction and return in the opposite direction. FIG. 11 is a flowchart showing the thin plate cutting action, FIG. 12 is a timing chart showing the thin plate cutting action, FIG. 13 is a block circuit diagram according to an embodiment of the present invention, and FIG. 14 15 is a block circuit diagram of the motor drive circuit, and FIG. 15 is a timing chart of the block circuit of FIG. 13. 10...Thin plate, 16...Positioning mark, 74,7
8...Feed roller, 76, 80...Pulse motor, 8
2, 84... Optical sensor, 502... High speed pulse signal,
504...Low speed pulse signal.

Claims (1)

[Claims] 1. A thin plate processing method in which a predetermined number of thin plates are cut or pressed, in which a feed drive is applied separately to both ends of the thin plate, and a thin plate is provided on the thin plate surface corresponding to the cutting or pressing positions. The positioning marks are detected separately using sensors on both sides.
Both ends of the thin plate are fed separately until each sensor detects the positioning mark, and when both sensors detect the positioning mark, feeding of the thin plate is stopped, and then the drive is returned to both ends of the thin plate to move the thin plate a predetermined amount. Return to the opposite direction, feed the thin plate in the feeding direction again until each sensor detects the positioning mark, and when both sensors detect the positioning mark, stop feeding the thin plate,
A thin plate processing method characterized by cutting or pressing a thin plate. 2 In the method according to claim 1, after both sensors first detect the positioning mark, returning the thin plate in the opposite direction and sending it in the forwarding direction is repeated a predetermined number of times, and then the thin plate is cut or A thin plate processing method characterized by press working. 3. In a thin plate processing method in which a thin plate is cut or pressed into a predetermined number of pieces, a feed drive is applied separately to both ends of the thin plate, and positioning marks provided on the thin plate surface corresponding to the cutting or pressing positions are placed on both sides of the thin plate. Detected separately by each sensor,
Both ends of the thin plate are first fed at high speed and then at low speed separately until each sensor detects the positioning mark, and when both sensors detect the positioning mark, the feeding of the thin plate is stopped, and then returned to both ends of the thin plate and driven. The thin plate is returned in the opposite direction by a predetermined amount at low speed, and the thin plate is again fed in the feeding direction at low speed until each sensor detects the positioning mark. When both sensors detect the positioning mark, the thin plate is stopped from being fed. A thin plate processing method characterized by cutting or pressing a thin plate. 4 In the method according to claim 3, after both sensors first detect the positioning mark, returning the thin plate in the opposite direction and sending it in the forwarding direction is repeated a predetermined number of times, and then the thin plate is cut or A thin plate processing method characterized by press working.