JPS60180798A - Sheet cutter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

The present invention relates to a cutting device for sequentially cutting a web (hereinafter referred to as a preprinted printed matter) that has been previously printed and wound up into a roll shape, one after another, at predetermined positions. FIG. 1 shows a conventional-IIQ device configuration as a one-stick cutting device for preprinted printed matter. The preprinted printed matter 1 shown here is unwound from a roll 2 through two rollers, a feed roller 3 and a hack-up roller 4 cooperating therewith, and is sent to a cutting device indicated by 5 as a whole to be cut. There is. The feed roller 3 is driven by a main drive motor 6, with an output shaft 7,
The shaft lO1 is rotationally driven via this and a fully geared gear 8.9.
The drive shaft 13 is rotated at a substantially constant j* degree by a drive shaft 13 which is rotatably driven via this and a full gear gear 11, ]2. The cutting device 5 includes a rotary cutter 20 and a rotary member 21 that cooperates with the rotary cutter 20, and is configured to cut the preprinted printed matter 1 passing between the two with a cutter blade 20A. The rotational speed of the working rotating member 21 determines the cutting distance (cutting length) in relation to the feeding speed of the preprinted printed matter 1. The rotational drive of the cutting device 5 is driven by the output of the main drive motor 6. The rotational speed of the shaft 7 is changed to a required speed by a continuously variable transmission 22. Adjustment of the speed change by the continuously variable transmission 22 is performed by an operator rotating a handle 30. Furthermore, a differential gear mechanism 23 is interposed to perform phase alignment between the cutting position of the preprinted printed matter 1 and the cutting position by the cutter blade 20A, and a correction is made to drive the differential gear mechanism 23. A drive motor 24 is provided.The cutting device 5 also includes a photoelectric detector 26, for example, for detecting the register marks 25 formed on the preprint product 1.
The control unit 28 includes a pulse transmitter 27 that is interlocked with the rotary force/7 cooler roller 20, and based on these signals, the control unit 28 determines the cutting position and the rotational position of the cutter blade 20A in the pre-print printed matter 1. The correction drive motor 24 is controlled so as to detect and cut at a predetermined cutting position, thereby dealing with the phase advance or delay.

【ing. That is, the differential tooth rJi
The mechanism 23 makes phase control possible. According to the cutting device 5 configured as described above, the cutting device 5
While cutting the preprinted printed matter 1, the worker operates the handle 30 and adjusts the speed change of the continuously variable transmission 22 to match the cutting length. There are drawbacks that arise. Additionally, in general, 9 of the pre-printed printed materials 1 have a printing pinch that changes due to tension fluctuations during printing, changes in temperature and humidity at that time, slips, etc. Similarly, when feeding out for cutting, the cutting position also changes. I can't avoid the fact that it's coming. If the positional deviation caused by such reasons and adjustment errors is within a reasonable range, it can be tolerated by drive control of the correction drive motor 24 and phase control by the differential gear mechanism 3. However, in practice, this phase control does not solve the problem and has the disadvantage that the operator must operate the handle 30 again to readjust the continuously variable transmission 22. Such adjustment requires skill. Purpose of the Invention The purpose of the present invention is to solve the above-mentioned drawbacks of conventional cutting devices of this type, and to automatically control the cutting length to the optimum length even if positional deviation occurs due to adjustment errors or tension fluctuations. The purpose is to provide a cutting device that can. Optical measurement o11 The sheet cutting device according to the present invention is a cutting device that has a cutter for successively cutting a pre-printed sheet web (pre-printed printed matter) to be sent out at fixed positions, and has a cutter for cutting register marks on the sheet web one after another at fixed positions. a means for detecting;
a means for detecting the cutting position of the cutter; and a first control unit that manually controls the detection signals of the two means to align the cutting position of the cutter to an appropriate position; Nuclear force is used to change the cutting position by the cutter depending on the unit.
A differential gear mechanism provided in the drive system of the seven-wheel drive system and the first control unit input errors in the cutting position and input signals regarding the transport amount of the sheet web, thereby controlling the transport of the sheet web. a second control unit configured to recognize the direction of correction of the phase control being performed by the first control unit on the quantity; and a continuously variable transmission provided in the drive system of the cuckoo, so that the second control unit corrects the cutting length by the cutter when the second control unit detects the cut length. Features. Ha Zhao. FIG. 2 shows the overall configuration of a cutting device according to an embodiment of the present invention. This cutting device 40 is similar to the cutting device 5 shown in FIG.
In this embodiment, the preprinted printed matter l is transferred from the roll 2 by a feed roller 3 and a bank amplifier roller 4 cooperating therewith between a rotary cutter 20 and a rotary member 21 cooperating therewith. The arrangement configuration for feeding and cutting by the cutter blade 20A is the same. Also, a drive system that drives the feed roller 3 by the main drive motor 6, a continuously variable transmission 22, and a differential gear mechanism 2.
The drive system that drives the cutting device f40 via the drive line 3 and the phase control system that drives the differential gear mechanism 23 with the correction drive motor 24 are also the same as those shown in FIG. The same reference numerals as in FIG. 1 are used. As a feature of the present invention, a second pulse transmitter 50 is attached to the drive shaft 13 of the feed roller 3, and a speed change adjustment of the continuously variable transmission 22 is used as a means for detecting the feeding amount of the preprinted printed matter l. The handle 30 shown in FIG. 1 for
A second correction drive motor 51 and a second control unit 52, which are assembled in place of the above, are newly provided. Other than this, the configuration is the same as that shown in FIG. The second pulse generator 50 is configured to generate pulses in response to the rotation of the drive shaft 13 of the feed roller 3, and detects the feeding amount of the preprinted printed matter 1 every time the number of pulses is counted. I'm trying to make it possible. Further, the second correction drive motor 51 is immediately controlled by a second control unit 52. FIG. 3 shows a schematic control block diagram of the cutting device 40 having such a configuration. In Figure 3, single-point chain vAA
The upper part surrounded by 2 is a block related to the phase side 'a (same as the control of the cutting device 5 in FIG. 1) performed by the control of the differential gear mechanism 23 by the first correction drive motor 24,
The lower part surrounded by the single-dot chain vAB is a program related to cutting length control performed by controlling the continuously variable transmission 22 by the second correction drive motor 51 newly added according to the present invention. That is, the present invention is particularly characterized by the addition of cutting length control shown in the lower part surrounded by the dashed line B. Operation control of the off-chip device 40 will first be explained with reference to its phase control block. I will explain it in synchronization with rotational force and 7 ter. The first pulse transmitter 27, which rotates in synchronization with the rotary cutter, outputs N pulses (N≧2) for one rotation of the rotational force/lid. A large number of outputs is good for N, but it has the drawback of being expensive, so the number of outputs for N is preferably about 100 to 1000 pulses. In this example, N=100. By counting the number of N outputs with the counter 63, the rotational position of the rotary cutter can be known. The photoelectric detector 26 detects the register mark 25, but if there are other marks, it will also be detected, so it is necessary to set a gate to extract only the register mark 25. The rotary cutter and the register mark have a specific positional relationship. If this position is manually entered into the gate setting device 60, the manually entered value will be set in the gate generator 62 via the micro 10 sensor 61. The data 1 generator 62 gates the output pulse from the pulse oscillator 27 using nIInO2 (11 + 1 + 1 + 7 = 7). Since the photoelectric detector 26 is ANDed with the gate signal in the A N [, ) circuit 64, only the register mark 25 can be extracted. In this way, the first control unit 28 detects the register mark 25 with the photoelectric detector 26, thereby detecting the register mark 25.
The rotational position of the cutter blade 20A can be detected by detecting the printing position on the preprinted printed material 1 and counting the pulses from the first pulse transmitter 27 using a counter 63. As a result, when the microprocessor 61 detects that the cutting position has deviated from the proper position based on both detection signals, the output circuit 65 drives the -th correction drive motor 24 and the differential gear mechanism 23 to correct the cutting phase in the forward or backward direction and control the cutting position. That is, phase control is performed. On the other hand, the present invention is characterized by the operation of controlling the continuously variable transmission 22 so that the first control unit 28 can perform optimal phase control during the cutting operation, which is indicated by the dashed line B. The first operation of controlling the continuously variable speed a22 to the desired cutting length in the absence of pre-printing is to control the output of the pulse transmitter 5o, which is operated in synchronization with the feed roller 3, in synchronization with the rotary cutter 20. This is achieved by a counter 70 that counts the output of the operating pulse transmitter 27 at intervals of a reference pulse (an encoder pulse transmitter, a signal that generates one pulse per revolution, commonly called a zero pulse). That is, since the output of the pulse transmitter 50 is proportional to the feed amount of the feed roller 3, it can be detected as the length of the web, and the reference pulse of the pulse transmitter 27 corresponds to one rotation of the rotary cutter 20. Since one pulse is output, it can be taken out as a reference for the length of rotation of the cutter blade 20'A month, that is, the cutting length. If the number of output pulses of the pulse generator 50 between one reference pulse of the pulse generator 270 and the next reference pulse is known, the cutting length can be determined. The microprocessor 71 compares the actual cutting length calculated from the counter 7o with the cutting length set in the cutting length setting device 72, and if there is an error in length, the microprocessor 71 outputs a second correction drive through the output circuit 7o. The motor 51 is driven and the continuously variable transmission 22 is controlled until the value matches the set value. In the second operation, the microprocessor 71 detects the cutting position error (
The correction amount) is manually inputted, thereby detecting the IlIIII state MG of the first control unit 28 for phase control of the feeding amount of the preprint l. That is, this microprocessor 7) detects the relationship between the phase control performed by the first control unit 2) and the feeding amount of pre-print 1, that is, the correction direction. There is. For example, if the first control unit 28 performs phase control biased toward either the forward direction or the backward direction, there will be a limit to the control by the differential gear mechanism 23, so the second control unit 28 control unit 5
2 detects this and determines that the initial cutting length setting by the continuously variable transmission 22 is inappropriate, and the microprocessor 7
1 drives and controls the correction drive motor 51 by the output circuit 73 to appropriately correct the continuously variable transmission 22. Such control is always feedback-controlled by signals from the first control unit 2B. In this way, in cutting length control, the control state of the first control unit 28 is constantly monitored to detect a cutting length setting error that would cause a control limit, and the continuously variable transmission 22
We need to control the operation and make modifications to avoid this. The above-mentioned control details are for explaining the basic features of the present invention, and such control can be realized in various ways using well-known electric circuits, and is not particularly limited. Fi! ! A complete automatic control of the cutting length can be realized, and changes in the cutting position due to manual setting errors or differences in environmental conditions can be quickly corrected. ■ Therefore, no observer is required. ■ Also, the amount of paper required for setting the cutting length can be minimized.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of a conventional cutting device. FIG. 2 is an overall perspective view of the cutting device according to the invention. FIG. 3 shows a schematic block 10 showing the control of the cutting device according to the invention. 1... Preprint 2... Roll 3... Feed roller 4... Bank amplifier roller 5... - Cutting device 6... Main drive motor 20... Rotating cutter 22... Continuously variable transmission 23... Differential gear mechanism 24... Correction drive motor 25... Register Mark 26...Photoelectric detector 27...Pulse transmitter 28...First control unit 30...
Handle 40...Cutting device 50...Second pulse transmitter 51...Second correction drive motor 52...Second control unit 60...
Gate setter 61... Micro 10 setter 62... Gate generator - 63... Counter 64... AND circuit 65... Output circuit 70... Counter 71... ... Microprocessor 72 ... Cutting length setting device 73 ... Output circuit Patent applicant Sakae Ono, patent attorney representing Japan Regulator Co., Ltd.

Claims (1)

[Claims] A cutting device having a cutter for successively cutting pre-printed sheet webs (preprinted printed matter) to be sent out at fixed positions, the cutting device comprising means for detecting register marks on the sheet web and detecting the cutting position by the cutter. a first control unit that inputs detection signals from both of the above-mentioned means and performs control to phase-align the cutting position of the cutter to an appropriate position; A differential gear mechanism provided in the drive system of the cutter and the first control unit manually input the error in the cutting position and also input a signal regarding the conveyance amount of the sheet web to change the sheet web. a second control unit configured to recognize the correction direction of the phase control performed by the first control unit with respect to the web transport amount; and a second control unit configured to recognize that the correction direction is biased in one direction. and a continuously variable transmission provided in the drive system of the cutter for correcting the cutting length by the cutter by the second control unit when detected by the second control unit. sheet cutting equipment.