JP2005219831A - Roller clearance adjusting device in folding device of printing machine and roller clearance adjusting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding roller clearance adjusting device capable of preventing paper jamming and breakage of a printing machine when folding precision corresponding to high speed of the printing machine is maintained and paper of web is cut during operation. <P>SOLUTION: A clearance adjusting mechanism for adjusting a clearance D between a pair of folding rollers 10a and 10b in the folding device of the printing machine is provided with a motor 16 for changing the clearance, a position detector 18 for detecting a position condition of the clearance, a controller 30 for commanding a target clearance value by a printing condition signal (printing condition data) 35 and an operation situation signal (operation state data) 36 and/or input data 34a from an input device 34, and a position controller 29 for driving and controlling the motor by receiving an instruction signal of the target clearance value from the controller or an instruction signal for moving the motor. The controller is constituted to generate the target clearance value using speed as variable. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a roller gap adjusting device and a roller gap adjusting method in a folding device of a printing press such as a newspaper printing press.

  A roller clearance adjusting device in a conventional folding machine of a printing press will be described with reference to FIGS.

  FIG. 5 shows a rotary printing press for newspapers, in which a web 05 is fed from a paper feeding device 21, a web 05 having a stable tension is supplied by an infeed device 22, and printing is performed by a printing device 23. A drag roller 01 is provided and an appropriate tension is applied to the web 05, and a necessary number of webs 05 are stacked and conveyed, and a folding device 25 is used as a signature of a desired building page and discharged. Reference numeral 26 denotes a paper break detector which detects that the web 05 has been broken. Generally, the machine is urgently stopped by this detection.

  FIG. 6 is a schematic configuration diagram of the folding device, which is viewed from A in FIG. After printing, the necessary number of webs 05 are folded in the vertical direction by the triangular plate 02, and are fed between the folding cylinder 08 and the saw cylinder 07 via the lead-in roller 03 and the nipping roller 04, cut, and the cylinder Folded parallel to the axis and ejected as a signature. FIG. 7 is a detail of the G portion of FIG. 6 and shows a portion that is folded in parallel with the barrel axis. The multiple webs 05 fed between the folding cylinder 08 and the saw cylinder 07 are cut between the saw blade 71 of the saw cylinder and the saw blade receiver 81 of the folding cylinder. At the same time, the web edge immediately behind the cut is cut. It is pierced by the needle device 82 of the folding cylinder, travels around the outer circumference of the folding cylinder in response to the rotation of the folding cylinder 08, and is cut about half a round for the next cutting. The folding blade 83 of the folding cylinder 08 is protruded from the cylinder surface almost at the center between the cut and conveyed leading edge and the next cutting edge, and the web is folded between the folding rollers 10a and 10b in parallel with the feeding cylinder axis. Made. The resulting signature 06 is sent to the impeller 11 and discharged from the paper discharge conveyor 12.

  FIG. 8 is an enlarged view of when the multi-page web 05 is pushed between the folding rollers 10a and 10b by the folding blade 83, and a gap D corresponding to the number of the webs 05 is set between the folding rollers 10a and 10b. The gap D is basically determined by the thickness and number of the webs 05 as described above. However, the appropriate gap slightly changes depending on the state of the surface friction force of the folding rollers 10a and 10b and the folding blade 83, the operation speed, and the like.

  Therefore, conventionally, the gap between the folding rollers can be remotely operated as shown in FIG. This folding roller gap adjusting device transmits the rotation of the motor 16 to one end of the screw shaft 20a through the joint 17a, and moves the members engaged by the rotation of the screw shaft 20a, thereby moving the folding rollers 10a and 10b. The position is adjusted. A female screw portion 19e of a fulcrum shaft 19a supported by a pin 19c is screwed with a screw portion 20e of the screw shaft 20a to a stand 15a supported from the folding device frame. A roller support arm 13a that supports the folding roller 10a at one end is rotatably supported by a shaft 14a supported from a folding device frame, and a moving shaft 27a is supported by a pin 27c at the other end. The female screw portion 27e of the moving shaft 27a is screwed with the screw portion 20f of the screw shaft 20a. When the screw shaft 20a rotates, the screw shaft 20a moves in the axial direction by the screw portion 20e. Further, when the screw shaft 20a rotates, the moving shaft 27a is moved in the axial direction by the screw portion 20f. If the screw pitches of the screw portions 20e and 20f are changed, the moving shaft 27a moves relative to the frame by the difference, and the roller support arm 13a is moved to move the folding roller 10a.

  A pinion 20c is machined at the other end of the screw shaft 20a. The moving mechanism of the folding roller 10b has the same structure, and the position of the folding roller 10b is adjusted so as to move in the direction opposite to the folding roller 10a by the rotation of the screw shaft 20b. The joint 17c is a joint that engages with the pinions 20c and 20d of the screw shafts 20a and 20b to transmit the rotational force. The screw shaft 20b is connected to a position detector 18 such as a rotary encoder through a joint 17b at one end. The spring 28 is provided so as to act in a direction in which the folding rollers 10a and 10b are pressed against each other, and suppresses fluctuation due to a gap of the moving mechanism.

  Reference numeral 29 denotes a position control device that operates the motor 16 in response to an instruction from the operation button 37 to control the gap D between the folding rollers 10a and 10b so that the position detector 18 recognizes the position of the folding roller 10a as a control result. It has become.

For example, Japanese Patent Application Laid-Open No. 7-237812 discloses a similar mechanism in which the relationship between the paper thickness and the appropriate gap is stored, the operation button is used to select the paper thickness, and the proper folding roller gap is obtained. Has been.
Japanese Patent Laid-Open No. 7-237812 (FIG. 6)

  However, in recent years, the speed of the machine has been increased, and if the gap D is set only by the number of webs (paper) 05 to be dealt with and the thickness (paper thickness) calculated from the type of paper, the same folding accuracy as at low speed can be maintained. With the mechanism that sets the gap D uniquely from the paper thickness, the folding accuracy is poor. The reason for this is not clear, but it is thought that the frictional force changes due to the relative sliding between the web 05 and the folding rollers 10a and 10b and the folding blade 83, and the average pressing time decreases due to increased vibration. It is done.

In addition, when the web 05 is cut during operation, the signature 06 cannot be fed unless the gap D between the folding rollers is narrowed by the number of the cut webs, paper jam occurs, and the machine is damaged. In particular, at higher speeds, the degree of damage caused by an accident increases.
As described above, the following problems arise as the machine speed increases.

  In the conventional roller gap adjusting device in the folding device of the printing press, the setting of the gap between the folding rollers 10a and 10b cannot be uniquely determined from the paper thickness. Further, there is a problem that the damage of the accident increases unless the correspondence adjustment of the gap D between the folding rollers 10a and 10b when the paper is cut is urgently performed.

  In view of the above problems, an object of the present invention is to propose a roller gap adjusting device and a roller gap adjusting method that can appropriately perform roller gap adjustment in a folding device of a printing press and that do not cause a sheet breakage accident.

  In order to solve the above problems, the present invention employs the following means.

  A roller gap adjusting device in a folding device for a printing press according to claim 1 is a gap adjusting mechanism for adjusting a gap between a pair of folding rollers in a folding device for a printing press, and a motor for changing the gap, A position detector for detecting the position state, a control device for instructing a target gap value based on printing condition data and operation state data and / or input data from the input device, and a target gap value instruction signal or motor from the control device A position control device that drives and controls the motor in response to a movement instruction signal, and the control device generates a target gap value having a speed as a variable.

  A roller gap adjusting device in a folding device of a printing press according to claim 2 is a method in which the control device in the device according to claim 1 has a relationship between the target gap value and speed with parameters of paper quality, paper thickness, and number of stacked sheets as parameters. And a calculation unit that calculates the target gap value, and a control unit that captures in real time operation status data including at least operation start, speed change, and number of sheet breaks.

  According to a third aspect of the present invention, there is provided a roller gap adjusting device in the folding device for a printing press, wherein the number of sheet breaks is added as a variable to the control device in the first device.

  The roller clearance adjustment method for a folding device of a printing press according to claim 4 is a roller clearance adjustment method for adjusting a clearance between a pair of folding rollers in a folding device of a printing press, wherein a web feed speed from the printing press is predetermined. The gap between the folding rollers is narrowed when the speed is exceeded and / or when a sheet breakage occurs.

  According to the roller clearance adjustment device in the folding device of the printing press according to claim 1, the roller clearance is set to be zero when the operation is started or based on the operation preparation signal, and the speed changes when the operation starts. It is possible to make the gap according to. Also, even if the initially planned gap setting program is not sufficient, the program can be corrected by forcibly correcting it from the input device, and the set value can be converged to an unnecessary state as it is used. .

  In addition, the above-mentioned action ensures that the shape accuracy of the signature is always kept in a good state, and skill and response from investigating the cause of the fold shape failure to performing the correction operation are no longer necessary, and the average product (signature) quality And the operator's workload can be reduced.

  A roller gap adjusting device in a folding device of a printing press according to claim 2 is a method in which the control device in the device according to claim 1 has a relationship between the target gap value and speed with parameters of paper quality, paper thickness, and number of stacked sheets as parameters. And a control unit that calculates the target gap value, and a control unit that captures in real time operation status data including at least operation start, speed change, and number of sheet breaks. In addition, the gap between the folding rollers according to the speed change can be made in real time, and the speed-up operation can be performed.

  A roller gap adjusting device in a folding device of a printing machine according to claim 3 is obtained by adding the number of paper breaks as a variable to the control device in the device of claim 1, and adjusting the folding roller gap at the time of paper break. Since this is done, there is an effect that no paper jam occurs when the paper is cut.

  The roller clearance adjustment method for a folding device of a printing press according to claim 4 is a roller clearance adjustment method for adjusting a clearance between a pair of folding rollers in a folding device of a printing press, wherein the web feed speed from the printing press is a predetermined speed. When this occurs and / or when a paper breakage occurs, the gap between the folding rollers is narrowed, and the pinching force of the paper by the folding roller at the time of acceleration and / or paper breaking is increased. There is an effect that clogging does not occur.

 BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described based on Examples 1 and 2 below.

A first embodiment of the present invention will be described with reference to FIGS. In addition, about the same site | part as the above-mentioned conventional thing, the same code | symbol is attached | subjected and shown in a figure, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a configuration diagram of a folding roller gap adjusting device according to the first embodiment, FIG. 2 is a control flow diagram of the folding roller gap adjusting device, and FIG. 3 is an example of control program contents of the folding roller gap adjusting device.

  In FIG. 1, reference numeral 30 denotes a control device, which includes a storage unit 31, a calculation unit 32, and a control unit 33. Data is exchanged. As shown in FIG. 2, the storage unit 31 of the control device 30 stores the relationship between the set target value of the folding roller gap D and the speed using the paper quality, the paper thickness, and the number of stacked sheets as parameters. Necessary data, data such as paper quality, number of stacked sheets (building page), and the like are fetched from the printing condition signal 35 operated by the corresponding printing machine.

  The control unit 33 captures the above-described condition data, and also captures the operation status signal 36 such as operation start, speed change, and the number of sheet breaks from the sheet breakage detector 26 in FIG. 5 in real time and should be set by the program in the storage unit 31. The roller gap D is calculated by the calculation unit 32 and the result is transmitted to the position control device 29.

  The position control device 29 operates the motor 16 so that the target gap received from the control device 30 is obtained in real time while confirming the adjustment position with the position detector 18.

  The input device 34 is capable of inputting a program and forcibly correcting the roller gap D by the input data 34a. The control unit 33 of the control device 30 stores the amount forcibly corrected by the input device 34 and the conditions at that time (paper quality, paper thickness, number of stacked sheets, speed, etc.) in the storage unit 31 and the data at an appropriate time. Can be calculated and the gap setting program can be corrected from the input device 34. Alternatively, compulsory correction data under the same conditions can be accumulated and averaged, or the original data and the compulsory correction data can be weighted each time and averaged to immediately correct the program.

  FIG. 3 shows the contents of the control program of this apparatus, wherein the vertical axis represents the target clearance between the folding rolls 10a and 10b, and the horizontal axis represents the rotational speed (web feed speed) of the folding rolls 10a and 10b. The four control examples a, b, c, and d corresponding to the above conditions are shown. When the paper thickness and the paper quality are the same, the size of the target gap depends on the number of building pages, and the number of building pages decreases in the order of a, b, c, and d. Similarly, the target gap is also set smaller in that order. Has been. Further, the speed is set to be constant up to a predetermined speed S, and when the speed exceeds the predetermined speed S, the program is set so that the target gap between the folding rolls 10a and 10b is narrowed.

  According to the above apparatus, based on the operation start or operation preparation signal, it is set to be the roller gap D when the speed is zero, and when the operation is started, the gap D can be set according to the speed change. Even when the initially planned gap setting program is not sufficient, the program can be corrected by forcibly correcting it from the input device 34, and the set value can be converged to an unnecessary state as it is used. it can.

  In addition, this ensures that the signature accuracy of the signature 06 is always kept in a good state, and skill techniques from the investigation of the cause of the folded shape to the implementation of the correction operation and its response become unnecessary, and the average product (signature) quality is improved. There is an effect that it is possible to improve and reduce the workload of the operator.

A second embodiment of the present invention will be described with reference to FIGS.
FIG. 4 shows the contents of the folding roller gap setting program.
In addition to the content of the clearance setting program for the folding rollers 10a and 10b shown in FIG. 3 in the configuration of the first embodiment, this apparatus sets the folding roller clearance D to the number of sheets to be cut when the web 05 is cut during operation. The size is reduced according to the condition. Further, the sheet break information is input from the sheet break detector 26 of FIG.

  FIG. 4 shows the target gap D value at each speed when one sheet of web 05 is cut during operation and the machine is stopped suddenly, and the second sheet 05 is cut during deceleration. This means that you can do this. Also, as shown in FIG. 4, when one of the webs stacked and sent is cut, the target gap is set small from a to b, and the second sheet is cut. When this occurs, the speed is reduced and the target gap is set small from b to c.

  In other words, the gap D between the pair of folding rollers 10a and 10b is defined as the gap between the folding rollers 10a and 10b when the web feed speed from the upstream printing machine becomes equal to or higher than a predetermined speed or when a sheet breakage occurs. The program is set to narrow D.

  In addition to the effects and effects similar to those of the first embodiment, this apparatus can correct the folding roller gap D to an appropriate value corresponding to the paper break during operation. Clogging can be reduced. Therefore, damage to the machine can be reduced, and paper jam removal operations can be reduced. In particular, eliminating a paper jam in a high-speed machine has the effect of preventing a major accident of machine damage.

  Further, the present invention is not limited to the above-described embodiments, and can be appropriately modified as necessary.

The block diagram which shows the folding roller clearance gap adjustment apparatus which concerns on 1st Example of this invention. The control flow figure which shows the folding roller clearance gap adjustment apparatus which concerns on 1st Example of this invention. The figure explaining the control program content of the folding roller clearance gap adjustment apparatus which concerns on 1st Example of this invention. The figure explaining the control program content of the folding roller clearance gap adjustment apparatus which concerns on 2nd Example of this invention. 1 is an overall configuration diagram of a newspaper rotary printing press. The schematic block diagram of a folding device. FIG. 7 is a detailed view from the G arrow view of FIG. The enlarged view which shows the state which pushes a web into a folding roller. The block diagram which shows the conventional folding roller clearance gap adjustment apparatus.

Explanation of symbols

05 Web
10a, 10b Folding roller 16 Motor 18 Position detector 29 Position control device 30 Control device 31 Storage unit 32 Calculation unit 33 Control unit 34 Input device 34a Input data 35 Print condition signal 36 Operation status signal 37 Operation button D Gap

Claims (4)

  In a gap adjustment mechanism that adjusts a gap between a pair of folding rollers in a folding device of a printing press, a motor that changes the gap, a position detector that detects a position state of the gap, printing condition data, operation state data, and And / or a control device for instructing a target gap value based on input data from the input device, and a position control device for driving and controlling the motor in response to a target gap value instruction signal or a motor movement instruction signal from the control device. A roller gap adjusting device in a folding device of a printing press, wherein the control device generates a target gap value whose speed is a variable.   A storage unit that stores the relationship between the target gap value and speed with parameters of paper quality, paper thickness, and number of sheets as parameters, a calculation unit that calculates the target gap value, at least operation start, speed The roller clearance adjustment device for a folding device of a printing press according to claim 1, further comprising a control unit that captures in real time operation status data including changes and the number of sheet breaks.   2. A roller gap adjusting device in a folding device of a printing press according to claim 1, wherein the number of sheet breaks is added as a variable to the control device.   In the roller gap adjustment method for adjusting a gap between a pair of folding rollers in a folding device of a printing press, when the web feed speed from the printing press exceeds a predetermined speed and / or when a sheet breakage occurs A roller gap adjusting method in a folding device of a printing press, characterized in that a gap between folding rollers is narrowed.

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