JP2008290849A - Paper splicing method, paper splicing device, paper feeding device, and offset rotary printing press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inhibit lowering of work efficiency caused by paper splicing failure occurring in paper splicing of a web delivered from a roll paper. <P>SOLUTION: In the paper splicing method by pressing the web by a paster roller, delivered from a presently used roll paper against an adhesion part formed on a web of a next used roll paper a radius of gyration which is the distance from the rotation center of the next used roll paper to the outer peripheral surface of the next used roll paper or a value corresponding to the radius of gyration is detected at a plurality of positions in the circumferential direction of the outer peripheral surface, a deformation quantity which is the deformation degree from a standard condition of the next used roll paper is calculated based on the detected radius of gyration, and, when the calculated deformation quantity is larger than a first predetermined value set beforehand, paper slicing is performed by setting the delivery speed slower than a standard speed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a paper splicing method, a paper splicing device, a paper feeding device used therefor, and a paper splicing device for performing paper splicing by laminating a web fed continuously from a current web and a web wound on a next web. The present invention relates to an offset rotary printing press.

In general, an offset rotary printing press includes a paper feeding device, an infeed device, a printing device, a dryer device, a cooling device, a web pass device, a folding device, and the like.
In the paper feeding device, a paper roll (winding paper) obtained by concentrically winding a belt-like continuous paper (web) is set, and the web is fed out from the paper roll by an infeed device. The printed web is conveyed to the folding device through a dryer device, a cooling device, and a web pass device, and a folding book is created by the folding device.

In such a web offset printing press, a device called a paper splicing device is generally installed.
The splicing device operates the web offset press by pasting the web that is currently being fed and the web of the paper roll that will be fed next (winding paper to be used next, hereinafter called paper roll). It is an apparatus that enables a web to be continuously supplied without being stopped (see, for example, Patent Document 1).

FIG. 16 is a schematic diagram showing a main part of a conventional splicing device. As shown in FIG. 16, the paper splicing device 100 includes a paster roller (corresponding to a brush roller of Patent Document 1) 104, a paster arm 105, an air cylinder 106, and a cutter 107.
The web splicing device 100 includes a web 101 fed out from a paper roll (not shown) (currently used winding paper, hereinafter referred to as current paper roll), and a web of a paper roll (next used paper roll) 102 to be used after paper splicing. And the web is continuously fed. An adhesive portion 103 is formed on the peripheral surface of the next use paper roll 102.

The paper splicing operation by the paper splicing device 100 will be specifically described. The next use paper roll 102 is rotated by a rotation driving device (not shown) so that the peripheral surface speed becomes equal to the feeding speed of the web 101.
Thereafter, the air cylinder 106 is actuated to extend and the paster arm 105 is swung to the web 101 side, whereby the paster roller 104 is pressed to the next use paper roll 102 side through the web 101.

  Then, in a state where the web 101 is pressed against the next use paper roll 102 by the paster roller 104, the adhesive portion 103 passes through this pressing portion by the rotation of the next use paper roll 102, and is fed out from the current use paper roll. The web 101 and the web wound around the next use paper roll 102 are pasted together, the web is pulled out from the next use paper roll 102, and the feeding of the web from the next use paper roll 102 is started. The web 101 fed out from the currently used paper roll is cut, and the paper splicing operation is completed.

As a result, the web 101 fed out from the currently used paper roll and the web wound around the next used paper roll 102 are continuously fed without interruption.
JP 2003-201048 A

By the way, with the improvement of technology, in a web processing apparatus that processes a web, such as a web offset printing press, the operation speed has been increased in order to improve productivity.
As the speed of the web processing apparatus increases, the web splicing device provided in the paper feeding device of the web processing apparatus is also required to increase the web feeding speed at the time of paper splicing.
However, in the conventional paper splicing device, when the web feed speed at the time of paper splicing is low, even if the paper splicing is performed without any trouble, as the web feed speed increases, It has been found that the web fed from the current paper roll and the next used paper roll are not sufficiently joined at the time of paper splicing, and a paper splice failure may occur.

When a splice failure occurs, the web feeding is stopped, the web processing apparatus must be stopped, and it takes a lot of work to operate the web processing apparatus again. The productivity of the processing apparatus will be greatly reduced.
Hereinafter, the reason why a paper splice failure is likely to occur when the web feed speed during paper splicing is increased will be described.

  The paper roll (rolled paper) is essentially a substantially cylindrical shape centered on the center of the paper tube, which is the core rod. However, the paper roll (winding paper) is true when some external force is applied during conveyance before being set in the paper splicing device. It may be deformed from the cylindrical shape. In addition, the paper roll may be deformed due to changes in the dryness of the web wound around the paper roll due to the influence of the temperature and humidity of the stock yard in which the paper roll is stored, causing expansion and contraction.

If the deformation of the paper roll is large enough to be visually confirmed by an operator who operates the paper splicing device, such a paper roll can be eliminated in advance as a defective roll.
However, if the paper roll is slightly deformed, it cannot be visually confirmed, and a paper roll deformed from its original shape (standard state) (hereinafter referred to as a deformed roll) may be set in the paper splicing device.

FIG. 17 is a schematic diagram illustrating the behavior of the paster roller 104 when the convex portion T is formed on the outer peripheral portion of the paper roll 102 as an example of the deformation roll in the paper splicing device 100 described with reference to FIG. 16.
In FIG. 17, the convex portion T is exaggerated, but actually the size of the convex portion T is slight. Further, in FIG. 17, in order to facilitate the explanation of the behavior of the base roller 104, the paster roller 104 is illustrated as if it circulates around the paper roll 102. As described above, the paper roll 102 rotates, and the circumferential position of the paster roller 104 is fixed.

  When the paper roll 102 with the convex portion T formed is set as the next use paper roll in the paper splicing apparatus 100 for performing paper splicing, the paster roller 104 sandwiches the web 101 (not shown in FIG. 17) next. When passing through the convex portion T in a state of being pressed against the used paper roll 102, the paster roller 104 is bounced up from the outer peripheral surface of the next used paper roll 102 and bounces against the outer peripheral surface.

Thus, in the section where the paster rotor 104 is flipped up, the paster roller 104 is not properly pressed against the next-use paper roll 102. And when the adhesion part 103 is formed in such a section, the web 101 and the adhesion part 103 are not fully pressed, but the web 101 and the web wound around the next use paper roll 102 are enough. Since they are not bonded together, a paper splice failure occurs.
However, conventionally, if the deformation of the paper roll 102 (here, the size of the convex portion T) is so small that it cannot be visually confirmed by the operator, the bounce of the paster roller 104 is negligible. It was not enough to cause a defect.

  However, if the web feed speed at the time of paper splicing increases, even if the deformation of the paper roll 102 is a slight deformation that cannot be visually confirmed by the operator, the paster roller 104 will bounce greatly due to this deformation. Therefore, it is considered that a new problem of increasing the frequency of occurrence of a paper splice failure has occurred.

In addition to the example described with reference to FIG. 17, the deformation mode of the paper roll 102 includes a case where the paper roll 102 is deformed in a flat shape as illustrated in FIG. 18, or a case illustrated in FIG. 19. In this way, the roll diameter may be biased with respect to the rotation axis direction of the paper roll 102.
When the diameter of the paper roll 102 is biased as shown in FIG. 19, the adhesive portion 103 and the web 101 are only partially pressed in the width direction of the web 101 (that is, the rotation axis direction), and an appropriate paper splicing is performed. May occur.

  The present invention has been devised in view of the above problems, and in the case of web splicing from a web, a paper splicing method, a paper splicing method, and the like, which can suppress a decrease in workability due to a splicing failure. It is an object of the present invention to provide an apparatus, a paper feeder, and an offset rotary printing press.

  In order to achieve the above-mentioned object, according to the paper splicing method of the present invention (Claim 1), the web fed at an arbitrary feeding speed from the currently used winding paper is formed into the web of the next winding web. A paper splicing method for performing paper splicing by pressing against the adhesive portion with a pasta roller, wherein the rotation radius is the distance from the rotation center of the next-use winding paper to the outer peripheral surface of the next-use winding paper, or the rotation A rotation radius detection step for detecting a value corresponding to a radius at a plurality of locations in the circumferential direction of the outer peripheral surface, and the next use based on the rotation radius detected in the rotation radius detection step or a value corresponding to the rotation radius A deformation amount calculating step for calculating a deformation amount that is a degree of deformation from the reference state of the web, and the deformation amount calculated in the deformation amount calculating step are set in advance. Is greater than a first predetermined value which is is characterized by having a a splicing step of performing said paper splicing by slower than reference speed the feeding speed.

When the deformation amount is equal to or less than the first predetermined value, the splicing is performed at a reference feeding speed (that is, a reference speed).
In addition, the detection of the rotation radius or the value corresponding to the rotation radius may be continuously detected in a predetermined section in the circumferential direction of the outer circumferential surface of the next use winding paper. You may make it detect continuously over the perimeter.

Alternatively, the rotation radius or the value corresponding to the rotation radius may be detected intermittently at predetermined intervals in a predetermined section in the circumferential direction of the outer peripheral surface of the next use winding paper. You may make it detect intermittently for every predetermined interval over the perimeter of the outer peripheral surface of paper.
Further, when the deformation amount calculated in the deformation amount calculating step is further larger than a second predetermined value set in advance as a value larger than the first predetermined value, the paper splicing step includes the step It is preferable to have a paper splicing stop step for canceling the splicing.

In this way, when the amount of deformation of the next-use winding paper is so large that it is not suitable for paper splicing, it is possible to reliably prevent the web from being cut due to a paper splicing failure by stopping the paper splicing. . Furthermore, it is possible to quickly replace the next-use winding paper with another one, and it is possible to improve the work efficiency of the paper splicing work.
In the deformation amount calculating step, it is preferable that the difference between the maximum value and the minimum value of the rotation radius or a value corresponding to the rotation radius is calculated as the deformation amount.

In this way, the amount of deformation of the next web is reliably detected by the difference between the maximum value and the minimum value of the distance from the rotation center to the outer peripheral surface of the next use web. can do.
In the deformation amount calculating step, it is preferable to calculate, as the deformation amount, a rate of change of the rotation radius or a value corresponding to the rotation radius with respect to a circumferential movement (claim 4).

In this way, it is possible to detect the presence or absence of sudden irregularities on the outer peripheral surface from the rate of change with respect to the circumferential movement such as the rotation radius, thereby reliably detecting the deformation amount of the next web. it can.
In the turning radius detection step, the turning radius or a value corresponding to the turning radius may be detected at a plurality of locations in the circumferential direction of the outer peripheral surface at a plurality of different axial positions of the next use web. Preferred (claim 5).

In this way, the deformation amount of the next roll-up paper can be detected with higher accuracy from the difference in distance at a plurality of points where the axial position of the next-use roll-up paper is different.
Further, in the deformation amount calculating step, a difference between a maximum value and a minimum value of the rotation radius or a value corresponding to the rotation radius at the plurality of axial positions at the same circumferential position of the next web is determined. It is preferable to calculate the amount of deformation (claim 6).

In this way, it is possible to detect that the winding paper is deformed in the axial direction from the difference in the distances at a plurality of points where the axial position of the next use winding paper is different. The amount can be reliably detected.
Further, it is preferable that the turning radius detecting step includes a distance detecting step of detecting a distance from a predetermined measurement position to the outer peripheral surface of the next use web at a plurality of locations in a circumferential direction of the outer peripheral surface. Item 7).

In this way, by detecting the distance from the predetermined measurement position to the outer peripheral surface of the next use web, over the entire circumference (360 degrees) of the outer peripheral surface, the maximum value and the minimum value of the rotation radius are detected. The difference and the rate of change with respect to the circumferential direction can be detected.
In the distance detection step, it is preferable to detect the distance from the measurement position to the outer peripheral surface at a plurality of different axial positions of the web.

In this way, it is possible to reliably detect the rotation radii at a plurality of different axial positions of the next use web. Thereby, the difference between the maximum value and the minimum value of the rotation radius at a plurality of points in the axial direction can be obtained, and it can be detected that the web is deformed in the axial direction.
Further, in the step of detecting the radius of rotation, the displacement amount of the circumferential surface follower member that contacts the outer circumferential surface of the next use web and is displaced following the unevenness of the outer circumferential surface is calculated in a plurality of circumferential directions of the outer circumferential surface. It is preferable that it is a follow-up member displacement amount detection step detected at a location.

In this way, the difference between the maximum value and the minimum value of the rotation radius and the rate of change in the circumferential direction can be detected with a simple configuration of detecting the displacement amount of the circumferential surface following member.
In the follow-up member displacement amount detection step, it is preferable to detect the displacement amount of each of the peripheral surface follow-up members at a plurality of different axial positions of the web.

If it does in this way, with the simple composition of detecting the amount of displacement of a peripheral surface follow-up member, the radius of rotation in a plurality of different axial directions of the next use winding paper can be detected reliably. Thereby, the difference between the maximum value and the minimum value of the rotation radius at a plurality of points in the axial direction can be obtained, and it can be detected that the web is deformed in the axial direction.
Further, prior to performing the paper splicing, there is a pre-rotation step for prerotating the next use web winding paper so that the peripheral speed of the next web winding paper becomes equal to the feeding speed at the time of paper splicing execution. And it is preferable that the said rotation radius detection step is performed simultaneously in the said pre-rotation step (Claim 11).

  In this way, the web splicing can be reliably performed by executing the splicing in a state where the speed of the web fed from the currently used web is equal to the speed of the adhesive portion of the next web winding. In addition, the rotation radius can be detected by using the rotation drive of the next winding paper in the pre-rotation step, so that the work on the work such as rotating the next winding paper only to detect the rotation radius is reduced. can do.

  Further, the paper splicing device of the present invention (Claim 12) includes a web feeding means for feeding the web from the currently used winding paper at an arbitrary feeding speed, and the next web being fed from the currently used winding paper. A paper splicing device having a paster roller that presses against an adhesive portion formed on a web of a wound paper, the distance being the distance from the rotation center of the next used web to the outer peripheral surface of the next used web. A rotation radius detecting means for detecting a rotation radius or a value corresponding to the rotation radius at a plurality of locations in the circumferential direction of the outer peripheral surface, and the next use winding paper based on the rotation radius or a value corresponding to the rotation radius A deformation amount calculating means for calculating a deformation amount which is a degree of deformation from the reference state, and the deformation amount calculated by the deformation amount calculating means is a first predetermined value set in advance. If even larger, are characterized by having a web splicing control means for feeding rate was slower than reference speed performing said paper splicing by said web feeding means.

The paper splicing control means is configured to control the web feeding means so that the paper splicing is performed at a standard feeding speed when the deformation amount is equal to or less than a first predetermined value.
In addition, the detection of the rotation radius or the value corresponding to the rotation radius may be continuously detected in a predetermined section in the circumferential direction of the outer circumferential surface of the next use winding paper. You may make it detect continuously over the perimeter.

Alternatively, the rotation radius or the value corresponding to the rotation radius may be detected intermittently at predetermined intervals in a predetermined section in the circumferential direction of the outer peripheral surface of the next use winding paper. You may make it detect intermittently for every predetermined interval over the perimeter of the outer peripheral surface of paper.
In the paper splicing device, when the deformation amount calculated by the deformation amount calculation unit is larger than a second predetermined value set in advance as a value larger than the first predetermined value, the paper It is preferable to have a paper splicing stopping means for canceling splicing.

Preferably, the deformation amount calculating means calculates, as the deformation amount, a difference between the rotation radius detected by the rotation radius detection means or a maximum value and a minimum value corresponding to the rotation radius (claim). Item 14).
Preferably, the deformation amount calculating means calculates, as the deformation amount, a rate of change of the rotation radius detected by the rotation radius detection means or a value corresponding to the rotation radius with respect to circumferential movement. ).
Further, the turning radius detecting means detects the turning radius or a value corresponding to the turning radius at a plurality of locations in the circumferential direction of the outer circumferential surface at a plurality of different axial positions of the next use web. Preferably, it is configured (claim 16).

Further, the deformation amount calculating means calculates the difference between the maximum value and the minimum value of the rotation radius or the value corresponding to the rotation radius at the plurality of axial positions at the same circumferential position of the next web. It is preferable to calculate the amount of deformation (claim 17).
The rotation radius detection means is disposed at a predetermined measurement position, and detects the distance from the measurement position to the outer peripheral surface of the next use web at a plurality of locations in the circumferential direction of the outer peripheral surface. Preferably, it is a means (claim 18).

Further, it is preferable that the distance detecting means detects the distance from the measurement position to the outer peripheral surface with respect to a plurality of different axial positions of the web.
In addition, the rotation radius detection means contacts the outer peripheral surface of the next-use winding paper and displaces the peripheral surface following member that follows the unevenness of the outer peripheral surface and the displacement amount of the peripheral surface following member. Preferably, it comprises follower member displacement detection means for detecting at a plurality of locations in the circumferential direction of the outer peripheral surface.

Further, a plurality of the circumferential surface following members are provided at different axial positions of the web, and the following member displacement detecting means detects the displacement amounts of the plurality of circumferential surface following members in the circumferential direction of the outer circumferential surface. It is preferable to detect at a plurality of locations (claim 21).
In addition, before the paper splicing control means performs the paper splicing, the next-use web winding paper is preliminarily rotated so that the peripheral speed of the next-use web winding paper becomes equal to the feeding speed by the web feeding means. The rotation radius detection unit has a rotation radius or a value corresponding to the rotation radius in the circumferential direction of the outer circumferential surface with respect to the next use winding paper rotated by the pre-rotation unit. It is preferable to detect at a plurality of locations (claim 22).

A paper feeding device according to the present invention (Claim 23) is a paper feeding device that feeds a web, which is a belt-like continuous paper, to the subsequent stage side without interruption, and according to any one of claims 12 to 22. The paper splicing device described above is provided.
Thereby, the splicing failure in the splicing device can be reduced, and the web can be stably fed to the subsequent stage.

An offset rotary printing press (Claim 24) of the present invention is an offset rotary printing press that performs printing on a web fed from a paper feeding device, and the paper feeding device is a paper feeding device according to Claim 23. It is a paper device.
Thereby, since the web is stably supplied from the paper feeding device, the productivity of printed matter can be improved without stopping the operation.

  According to the paper splicing device, the paper splicing method, the paper feeding device, and the offset rotary printing press according to the present invention, when the deformation amount of the next use web is larger than the first predetermined value, the web feeding speed is reduced. In this state, the paster roller is pressed against the adhesive portion formed on the web of the next use web, so that the bounce of the pasta roller due to the deformation of the next use web can be reduced. It is possible to prevent as much as possible the occurrence of poor paper splicing by pressing the part.

  Thereby, when an offset rotary printing press is installed as a web processing device on the downstream side of the paper splicing section, an operation to remove the defective web remaining in the offset rotary printing press, an inspection operation of the web processing device, a defective web Web processing devices such as the work of passing a new web through the web processing device after removing the image, the operation of aligning the register of the pattern to be printed, the operation of adjusting the cutting position of the printing web, and the operation of adjusting the color tone of the printed pattern, etc. Various operations until the operation is resumed can be avoided, and the workability can be greatly improved.

  In addition, when a paper splice failure occurs, the web processing apparatus is damaged by passing through the web processing apparatus in a state where the web is deformed into an inappropriate shape (blurred, wrinkled, folded, overlapped, etc.). However, there is also an effect that it is possible to avoid such damage to the apparatus by reducing the occurrence of defective paper splicing as much as possible.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 13 are all for explaining an offset rotary printing press according to an embodiment of the present invention. FIG. 1 is a flowchart showing an operation procedure for web splicing, and FIG. 2 is an offset. 3 is a schematic side view showing the overall schematic configuration of the rotary printing press, FIG. 3 is a side view schematically showing the configuration of the paper feeding device and the paper splicing device, and FIG. 4 is a schematic top view of the periphery of the second paper roll. FIG. 5 is a diagram schematically showing the second paper roll in a top view, FIG. 6 is a diagram schematically showing a configuration of a main part of the paper splicing mechanism, and FIG. 7 is a diagram showing a paper roll rotating device. FIG. 8 is a perspective view schematically showing the configuration around the two paper rolls, FIG. 8 is a diagram showing a state in which the base plate is moved to the paper splicing position with respect to FIG. 3, and FIGS. 9A to 9C are all distance sensors. The function graphs showing the detection results are shown in FIGS. 10A and 10B. Graph showing the time change of the feeding rate in de, FIGS. 11 to 13 are flowcharts showing a subroutine executed in FIG. 1 either.

(Overall configuration of offset rotary printing press)
As shown in FIG. 2, the offset rotary printing press 50 includes a paper feeding device 51 including an infeed device 52, a printing device 53, a dryer device 54, a cooling device 55, and a web pass device 56 in order from the upstream. And a folding device 57.
Further, the rotary offset printing press 50 is provided with a control device 60 constituted by a computer having functions of a storage device, an arithmetic device, an input / display device, etc. (not shown), and the control device 60 is a paper feeding device. 51, the infeed device 52, the printing device 53, the dryer device 54, the cooling device 55, and the web pass device 56 and the folding device 57 can be controlled.

In particular, in the present invention, the control device 60 has functions as deformation amount calculating means, paper splicing control means, and paper splicing stop means.
In the rotary offset printing press 50, the web 1 which is a continuous belt-like sheet is fed out from the winding paper attached to the paper feeding device 51 by the infeed device 52, and printing is performed by the printing device 53 having an appropriate number of printing units. To do.

Here, four-color process printing is performed, and the printing apparatus 53 includes four printing units corresponding to the number of printing colors C (cyan), M (magenta), Y (yellow), and K (black). Is provided. Each printing unit is configured as a double-sided printing apparatus that performs printing on both sides of the web 1 simultaneously.
Further, here, the printing device 53 has a control function such as a color tone control function for detecting the color tone of the printed web by a sensor and automatically controlling the ink supply amount of each ink color based on the detection result of the color tone. is doing.

  The web 1 printed by the printing device 53 is cooled by the cooling device 55 after the ink is dried by the dryer device 54, conveyed to the folding device 57 through the web pass device 56, and cut into a web by the folding device 57. In addition, a folding book is created by performing folding processing. The folding device 57 has a cutting position optimization control function that detects a cutting registration mark on the traveling web 1 by a sensor and performs cutting at an optimal timing according to the web conveyance speed.

(Configuration of paper feeding device and paper splicing device)
Next, the configuration of the paper feeding device 51 and the paper splicing device provided in the paper feeding device 51 will be described.
As shown in FIG. 3, the paper feeding device 51 includes a main shaft 11, support arms 12 a and 12 b, a base plate 15, air cylinders 16 and 17, a paper splicing mechanism 2, and a distance sensor (rotating radius detection means) 3. .

The main shaft 11 is rotatably supported by a pair of frames in the axial direction, and can be rotated by a turning device (not shown).
The support arms 12a and 12b are provided in pairs in the axial direction of the main shaft 11, and the base ends of the support arms 12a and 12b are connected to the main shaft 11, and the support arms 12a and 12b are connected to each other. As the main shaft 11 rotates, it swings about the main shaft 11. The support arms 12 a and 12 b can also move in the axial direction of the main shaft 11.

  Roll support shafts 13 and 14 are attached to the tip portions of the support arms 12a and 12b, respectively. Then, the support arms 12a and 12b are moved in the axial direction, and the shafts of the first paper roll (currently used paper) R1 and the second paper roll (next used paper) R2 are supported by the support shafts 13 and 14. The first paper roll R1 and the second paper roll R2 are rotatably supported by chucking a paper tube (not shown) sandwiched from the outside in the axial direction.

The base plate 15 is fixed to the main shaft 11. Air cylinders 16 and 17 are attached to the end portions of the base plate 15 so as to be orthogonal to the support arms 12a and 12b, and guide rollers 18 and 19 are provided at the ends of the lots of the air cylinders 16 and 17, respectively. It is installed.
The web 1 is fed from the first paper roll R1 toward the guide roller 18. Hereinafter, the web 1 fed out from the first roll R1 is referred to as a web W1, and the web 1 fed out from the second roll R2 is referred to as a web W2. In addition, when it is not necessary to limit to the web W1 and the web W2, they are simply referred to as the web 1.

A guide roller 20 is rotatably fixed to the downstream side of the guide roller 18 with the web 1 interposed therebetween.
That is, the web 1 fed out from the first paper roll R1 is fed to the subsequent infeed device 52 via the guide roller 18 and the guide roller 20.
The infeed device 52 is provided with an infeed roller (web feeding means) 52A. Tension is applied to the web 1 by the infeed roller 52A, and the web 1 is fed from the paper feeding device 51 at an arbitrary feeding speed. It is supposed to be.

The operation of the infeed device 52, such as the setting of the feeding speed of the web 1, is controlled by the control device 60.
Further, a plurality of distance sensors (turning radius detection means, distance detection means) 3 are fixed to different positions in the axial direction of the second paper roll R2 on an installation stand adjacent to the infeed device 52. Then, as a value corresponding to the distance from the rotation axis O of the second paper roll R2 to the outer peripheral surface 4 of the second paper roll R2 (that is, the rotation radius), a radius that is a horizontal distance from the distance sensor 3 to the outer peripheral surface 4 The detection distance d (d1 to d3 in FIG. 4) can be detected.

Here, as shown in FIG. 4, the three distance sensors 3 </ b> A to 3 </ b> C are fixed horizontally at equal intervals in a direction parallel to the rotation axis O of the second paper roll R <b> 2 (that is, the left-right direction).
The distance sensor 3A detects the radius detection distance d1 in the vicinity of the left end of the second paper roll R2, and the distance sensor 3B detects the radius detection distance d2 at the center in the left-right direction of the second paper roll R2. The sensor 3C detects a radius detection distance d3 in the vicinity of the left end of the second paper roll R2.

  The distance sensors 3A to 3C can continuously detect the radius detection distances d1 to d3 with respect to the outer peripheral surface 4 of the rotating second paper roll R2 as described later, or the circumferential direction of the outer peripheral surface. The radius detection distances d1 to d3 can be detected intermittently at a plurality of locations. The detection results of the distance sensors 3A to 3C are input to the control device 60.

Here, the radius detection distances d1 to d3 are set to be continuously detected with respect to the entire circumference (360 degrees) of the outer peripheral surface 4 of the second paper roll R2.
In addition, an adhesive portion 4B formed of a double-sided tape or the like is formed on a part of the outer peripheral surface 4 of the second paper roll R2 over the entire length in the left-right direction of the second paper roll R2. Further, a black paper portion 4C colored in black is provided near the left end of the second paper roll R2 in the vicinity of the adhesive portion 4B.

Moreover, as shown in FIG. 5, you may comprise as adhesive part 4D which combined the adhesive part and the black paper part by sticking the double-sided tape colored black on the 2nd paper roll R2.
A black paper detection sensor 8 is provided toward the left end of the second paper roll R2, and when the black paper portion 4C passes through the detection area of the black paper detection sensor 8, a black paper detection ON signal is sent to the control device 60. It comes to input. Then, as will be described later, after the second paper roll R2 starts rotating by the paper roll rotating device 5, it is from when the black paper detection ON signal is issued until the next black paper detection ON signal is issued (that is, the first paper roll ON signal). In a section corresponding to the entire circumference of the two paper rolls R2, the detection of the radius detection distances d1 to d3 is executed.

On the other hand, the paper splicing mechanism 2 is disposed between the guide rollers 18 and 20. The paper splicing mechanism 2 has a pair of upper and lower guide rails 21 and 22 and a slide plate 23 supported so as to be movable along the guide rails 21 and 22.
The slide plate 23 is moved between a standby position and a paper splicing position (see FIG. 8) by a cable (not shown) connected to the slide plate 23 and the drive motor 24 as the drive motor 24 is driven. Yes.

A paster roller 25, guide rollers 26 and 27, and a cutter 28 are attached to the slide plate 23.
The guide roller 26 is disposed on the upstream side of the slide plate 23, and the guide roller 27 is disposed on the downstream side of the slide plate 23, and both of these guide rollers 26 and 27 are rotatable on the slide plate 23. It is supported by.

The paster roller 25 is disposed between the two guide rollers 26 and 27, and is rotatably supported by the slide plate 23 via a paster arm 25A and an air cylinder 25B as shown in FIG. Yes.
The paster roller 25 and the cutter 28 are configured to be able to advance and retreat with respect to the web 1 and the second paper roll R2.
The pasta roller 25 has a resilient layer formed of a resilient material such as rubber or sponge on the outer periphery.

(Configuration of pre-rotation device)
Further, as shown in FIG. 7, a clutch plate 35 having an engagement hole 35 </ b> A is provided on the left end side of the support arm 12 b so as to rotate integrally with the roll support shaft 14.
A paper roll rotating device (pre-rotating means) 5 is provided in the vicinity of the clutch plate 35.
The paper roll rotating device 5 includes a motor 31, a belt gear portion 32, a drive shaft 33, and a clutch 34. When the motor 31 is driven, the clutch 34 rotates through the belt gear portion 32 and the drive shaft 33. It has become.

The clutch 34 is formed with a convex portion 34A that can be engaged with the engagement hole 35A of the clutch plate 35. By the movement mechanism (not shown) of the paper roll rotating device 5, the convex portion 34A of the clutch 34 and the clutch plate 35 are connected. By engaging the engagement hole 35A, the rotational driving force of the motor 31 can be transmitted to the clutch plate 35 side.
The operation of the motor 31 is also controlled by the control device 60. Before the motor 31 performs paper splicing, the speed of the outer peripheral surface of the second paper roll R2 becomes equal to the feeding speed of the web W1. Thus, the second paper roll R2 is driven to rotate.

(Paper splicing operation)
At the time of paper splicing, first, as shown in FIG. 8, the slide motor 23 is moved to the paper splicing position by the drive motor 24.
Further, before and after the movement of the slide plate 23, the peripheral speed of the outer peripheral surface 4 of the second paper roll R2 is equal to the feeding speed V of the web W1 by the motor 31 of the paper roll rotating device 5. Rotation drive is started so as to be gradually accelerated.

When the peripheral speed of the outer peripheral surface 4 of the second paper roll R2 becomes equal to the feeding speed V of the web W1, the air cylinder 25B is driven and extended, and the paster arm 25A is advanced to the web W1 side, whereby the paster roller 25 is pressed against the outer peripheral surface 4 of the second paper roll R2 via the web W1.
Then, in a state in which the web W1 is pressed against the second paper roll R2 by the paster roller 25, the adhesive portion 4B passes through the pressing portion by the paster roller 25, whereby the web W1 fed out from the first paper roll R1 and the second web W1 are fed out. The web W2 wound around the paper roll R2 is bonded, the web W2 is pulled out from the second paper roll R2, and the web W2 is fed out from the second paper roll R2. Whether or not the adhesive part 4B has passed the pressing part by the paster roller 25 can be detected by a black paper detection ON signal. Thereafter, by moving the cutter 28 toward the web W1, the web W1 fed out from the first paper roll R1 is cut, and the paper splicing operation is completed. Thereby, the web W1 and the web W2 are continuously fed to the infeed device 52 side without interruption. Moreover, the length which the web W1 and the web W2 overlap can be reduced as much as possible.
As described above, the feeding speed V at the time of paper splicing is controlled by the control device 60 so that the infeed roller 52A of the infeed device 52 is controlled.

(Configuration of control device)
Next, the function of the control device 60 as a deformation amount calculation unit will be described.
As described above, the radius detection distances d1 to d3 at a plurality of locations in the circumferential direction of the outer peripheral surface 4 of the second paper roll R2 are input to the control device 60 from the distance sensors 3A to 3C, respectively.

Here, as shown in FIGS. 9A to 9C, the next black paper detection ON is performed over the entire circumference of the outer peripheral surface 4 of the second paper roll R2 (that is, after the black paper detection ON signal is input). The continuous radius detection distances d1 to d3 in the detection range (section until the signal is input) are input as functions d1 (θ) to d3 (θ) of the rotation angle θ.
Then, the maximum value (d1max, d2max, d3max) and the minimum value (d1min, d2min, d3min) for each radius detection distance d1 to d3 in the detection range are detected. Then, after calculating the difference Δd1, the difference Δd2 between d1max and d1min, the difference Δd2 between d2max and d2min, and the difference Δd3 between d3max and d3min, the largest value of Δd1 to Δd3 is the difference between the maximum value and the minimum value of the turning radius. The difference ΔD is calculated as the deformation amount of the second paper roll R2.

Further, the control device 60 calculates functions d1 ′ (θ) to d3 ′ (θ) obtained by differentiating the functions d1 (θ) to d3 (θ) with θ. Then, the largest value among the functions d1 ′ (θ) to d3 ′ (θ) is taken as the rate of change D _d of the rotation radius of the second paper roll R2 with respect to the circumferential movement as the deformation amount of the second paper roll R2. It comes to calculate.
Furthermore, the difference [d1 (θ) −d3 (θ)] between the values of the functions d1 (θ) and d3 (θ) at the same rotation angle (θ) is calculated. Then, the maximum value D ₁₃ of the difference [d1 (θ) −d3 (θ)] between the maximum value and the minimum value of the rotation radius at a plurality of axial positions at the same circumferential position (θ) of the second paper roll R2. Is calculated as the deformation amount.

On the other hand, the control unit 60 is pre D ₁ is configured as a predetermined first predetermined value corresponding to a [Delta] D, D ₂ is set as the second predetermined value. The magnitude relationship between D ₁ and D ₂ is D ₁ <D ₂ .
Further, in the control device 60, D _d1 is set in advance as a first predetermined value corresponding to D _d , and D _d2 is set as a second predetermined value. The magnitude relationship between D _d1 and D _d2 is D _d1 <D _d2 .

Further, the control unit 60 is pre D ₃ is set as the predetermined first predetermined value corresponding to D _13, D ₄ is set as the second predetermined value. The magnitude relationship between D ₃ and D ₄ is D ₃ <D ₄ .
Then, in the control device 60, the respective deformation amounts ΔD, D _d , D ₁₃ as the degree of deformation from the reference state (that is, the true cylindrical state) of the second paper roll R2 and the respective deformation amount values. When the magnitude relations with the predetermined values ΔD, D _d , D _{13 of} 1 are respectively compared, and the deformation amounts ΔD, D _d , D ₁₃ are all smaller than the first predetermined values ΔD, D _d , D ₁₃ The web splicing operation described above is performed in a state in which the web W1 is set as a standard feeding speed V ₀ (this standard feeding speed V ₀ corresponds to the normal operation speed of the offset rotary printing press 50). Accordingly, the operation of the paper splicing mechanism 2 is controlled.

When one or more of the deformation amounts ΔD, D _d , D ₁₃ are larger than the first predetermined values D ₁ , D _d1 , D ₃ , the deformation amounts ΔD, D _d , The magnitude relation between D ₁₃ and the second predetermined values D ₂ , D _d2 , D ₄ is compared.
When the deformation amounts ΔD, D _d , and D ₁₃ are smaller than the second predetermined values D ₂ , D _d2 , and D ₄ , the web W1 is used as a reference feeding speed (reference speed) V _0. The operation of the paper splicing mechanism 2 is controlled to perform the above-mentioned paper splicing operation in a state where the feeding speed V ₁ set in advance as the decelerated feeding speed (low speed paper splicing mode).

Further, when one or more of the deformation amounts ΔD, D _d , D ₁₃ are larger than the second predetermined values D ₂ , D _d2 , D ₄ , the controller 60 controls the second paper roll. It is determined that the deformation amount of R2 is not suitable for paper splicing, and the paper splicing by the second paper roll R2 currently chucked on the support arm 12b is stopped. At this time, the alarm operator built in the control device 60 notifies the print operator that the paper splicing is to be stopped.

When the paper splicing is stopped, the second paper roll R2 chucked on the support arm 12b is replaced with another paper roll to perform the paper splicing.
In addition, the control device 60 has a function that allows the advancement speed deceleration or acceleration to be selected in advance when the low-speed splicing mode is executed.
Here, it is possible to select a relatively gentle acceleration (here, step acceleration that accelerates stepwise) a _stp and a rapid acceleration a _h for changing the feeding speed as quickly as possible.

Here, since the step acceleration a _stp and the sudden acceleration a _h are positive in the direction in which the feeding speed increases, the step acceleration a _stp and the sudden acceleration a _h are negative when the feeding speed is decelerated. It becomes acceleration.
As for the step acceleration a _stp , the color tone control in the subsequent printing device 53 and the cutting position optimization control in the folding device 57 function normally according to the change in the feeding speed of the web 1, and the folding is performed during acceleration or deceleration. The value is set to such a value that the signatures discharged from the device 57 can be used as products.

That is, as shown in FIG. 10A, when the low-speed splicing mode is executed, the feeding speed V of the web W1 using the step acceleration a _stp (substantially equal to the standard feeding speed V ₀ in normal operation) is used. When decelerating to the feeding speed V ₁ and then accelerating again to the standard feeding speed V ₀ , the control of the printing device 53 and the folding device 57 in the subsequent stage is controlled even while the feeding speed is changing. Since a good product can be produced following the change in the feeding speed, no defective origami (that is, broken paper) does not occur in this section. However, since the adhesive portion 4B adheres in the section where the paper splicing operation is performed, the waste paper is generated only in a predetermined section (section indicated by hatching in the figure) after the paper splicing operation is started.

On the other hand, as shown in FIG. 10 (B), during low-speed web splicing mode execution, if a sudden acceleration a _h, complete quickly from deceleration start to accelerate the completion of the up speed V ₀ feeding criteria again through the paper splicing operation Can be made.
However, when the rapid acceleration _ah is used, the control of the subsequent printing device 53, the folding device 57, etc. cannot follow the change in the feeding speed, and a good product cannot be produced. For this reason, when the rapid acceleration _ah is used at the time of executing the low speed sheet splicing mode, the waste paper is generated in the section from the start of the deceleration to the completion of the acceleration (the section indicated by hatching in the drawing), and the amount of the waste paper is reduced. Will increase.

Incidentally, using a step acceleration -a _stp during deceleration during acceleration may be set to use a rapid acceleration a _h, with rapid acceleration -a _h during deceleration, set to use a step acceleration a _stp during acceleration May be.

(flowchart)
Hereinafter, a paper splicing procedure (paper splicing method according to the present embodiment) by the offset rotary printing press 50 of the present embodiment will be described with reference to the flowcharts of FIGS. 1, 11, 12, and 13.

As shown in FIG. 1, in step S100, the second paper roll R2 is chucked on the support arm 12b.
In step S110, the main shaft 31 is rotated to move the second paper roll R2 to a position (acceleration position) corresponding to the position of the clutch 34 of the paper roll rotating device 5. In step S120, the convex portion 34A of the clutch 34 and The engagement hole 35A of the clutch plate 35 is engaged, and the driving force of the paper roll rotating device 5 can be transmitted to the support arm 12b side.

In step S130, the control device 60 operates the motor 31 to start the rotation of the second paper roll R2 so that the peripheral speed of the outer peripheral surface 4 of the second paper roll R2 becomes equal to the feeding speed V of the web W1 ( Pre-rotation step).
As Step S140, after the second paper roll R2 starts rotating in Step S130, when the first black paper detection signal is input from the black paper detection sensor 8 to the control device 60, each distance sensor is set as Step S150. Detection of the radius detection distances d1 to d3 by 3A to 3C is started (rotation radius detection step, distance detection step).

When the second black paper detection signal is input again from the black paper detection sensor 8 to the control device 60 as step S160, the detection of the radius detection distances d1 to d3 by the distance sensors 3A to 3C is finished as step S170. Then, ΔD, D _d , and D ₁₃ as deformation amounts are calculated based on the detection results d1 (θ) to d3 (θ) input from the distance sensors 3A to 3C (deformation amount calculation step).

Note that, after the rotation of the second paper roll R2, the peripheral speed of the outer peripheral surface 4 of the second paper roll R2 is relatively low between the first black paper detection signal and the second black paper detection signal. The distance sensors 3A to 3C can detect the radius detection distances d1 to d3 with higher accuracy.
Deformation amount [Delta] D determination routine in step S180 to be described below, the amount of deformation D ₁₃ routine for determining the amount of deformation [Delta] D _d determination routine and the step S182 as a step S181, are performed respectively in parallel in the control unit 60.

As shown in FIG. 11, the deformation amount ΔD determination routine first compares the magnitude relationship between ΔD and D _{1 in} step T10 to determine whether the condition of ΔD> D ₁ is satisfied.
If the condition is not satisfied in step T10, the process proceeds to step T30, in which it is determined that paper splicing is performed at the reference speed, and the deformation amount ΔD determination routine is exited.
If the condition is satisfied in step T10, the process proceeds to step T20, and the magnitude relationship between ΔD and D ₂ is compared to determine whether the condition of ΔD> D ₂ is satisfied.

If the condition is not satisfied in step T10, the process proceeds to step T40, where it is determined that paper splicing is performed at a low speed (low speed paper splicing determination), and the deformation amount ΔD determination routine is exited.
On the other hand, if the condition is satisfied in step T10, the process proceeds to step T50, where it is determined to stop the paper splicing (paper splicing stop determination), and the deformation amount ΔD determination routine is exited.

As shown in FIG. 12, the deformation amount D _d determination routine first compares the magnitude relationship between D _d and D _{d1 in} step U10 to determine whether or not the condition of D _d > D _d1 is satisfied.
If the condition is not satisfied in step U10, the process proceeds to step U30, in which it is determined that paper splicing is performed at the reference speed, and the deformation amount _Dd determination routine is exited.
If the condition is satisfied at step U10, the process proceeds to step U20, and compares the magnitude relation between D _d and D _d2, determines whether a condition of D _d> D _d2 is established.

If the condition is not satisfied in step U10, the process proceeds to step U40, in which it is determined that paper splicing is performed at a low speed (low speed paper splicing determination), and the deformation amount _Dd determination routine is exited.
On the other hand, if the condition is satisfied in step U10, the process proceeds to step U50, where it is determined to stop paper splicing (paper splicing stop determination), and the deformation amount _Dd determination routine is exited.

As shown in FIG. 13, the deformation amount D ₁₃ determination routine first compares the magnitude relationship between D ₁₃ and D ₃ as step V10, and determines whether or not the condition of D ₁₃ > D ₃ is satisfied.
When the condition is not satisfied at step V10, the flow proceeds to step V30, and the decision to perform splicing exit the deformation amount D ₁₃ determination routine at a reference speed.
If the condition is satisfied at step V10, the flow proceeds to step V20, and compares the magnitude relation between the D ₁₃ and D _4, determines whether the D _13> D ₄ conditions are met.

When the condition is not satisfied at step V10, the flow proceeds to step V40, and the decision to perform splicing (slow web splicing determination) leaves the deformation amount D ₁₃ determination routine at a slower rate.
On the other hand, if the conditions are satisfied at step V10, the flow proceeds to step V50, exits the to determine the (paper splicing stop determination) deformation amount D ₁₃ determination routine to abort the paper splicing.

Then, as shown in FIG. 1, as step S190, it is determined whether or not the paper splicing stop determination has been made in each subroutine (steps S180, S181, S182). If no paper splicing stop determination is made in any of the subroutines, the process proceeds to step S191.
On the other hand, if the paper splicing stop determination is made in any of the subroutines, the process proceeds to step S220.

In step S191, it is determined whether or not the low speed sheet splicing is determined in each subroutine. If no low-speed paper splicing determination is made in any of the subroutines, the process proceeds to step S200.
On the other hand, if the low speed sheet splicing is performed in any of the subroutines, the process proceeds to step S210.

In step S200, paper splicing is executed at the reference speed V _{0 under} the control of the control device 60 (paper splicing step).
In step S210, paper splicing is performed by the decelerated slow velocity V ₁ than reference speed by the control of the control unit 60 (splicing step).
In step S220, the paper splicing is stopped under the control of the control device 60 (paper splicing stop step).

That is, among the determination results in each subroutine, the paper splicing cancellation is executed with the highest priority, and then the paper splicing at the low speed V ₁ is executed with priority.

(Action / Effect)
According to the paper splicing method, the paper splicing device, the paper feeding device, and the offset rotary printing press according to the embodiment of the present invention, the following operational effects are obtained.
If it is determined that the deformation amounts ΔD, D _d , D ₁₃ of the second paper roll R2 as the next use winding paper are larger than the first predetermined values D ₁ , D _d1 , D ₃ , respectively, since Pesutarora 25 W1 of the feeding velocity V in the adhesive portion formed on the next use winding paper web in a state of being reduced to the V ₁ it is made to be pressed, due to the deformation of the second paper roll R2 The displacement of the bounce of the pasta roller 25 can be reduced. As a result, the paster roller 25 can be more appropriately pressed against the adhesive portion 4B and the paper splicing can be performed more reliably. It is possible to prevent the productivity from being lowered by stopping the operation of the machine.

When it is determined that the respective deformation amounts ΔD, D _d , D _{13 of} the second paper roll R2 are larger than the second predetermined values D ₁ , D _d1 , D ₃ , the feeding speed V of the web W1 is set to V Even if the speed is reduced to ₁ , there is a high possibility that a paper splice failure will occur, and it is considered that the web 1 cannot be stably supplied by the paper feeding device 51. The work of exchanging the roll R2 with another paper roll can be performed quickly, and the work efficiency for paper splicing can be improved.

Further, the deformation of the second paper roll R2 such as irregularities or flattening can be reliably detected by the difference ΔD between the maximum value and the minimum value of the distance d from the rotation axis O to the outer peripheral surface 4.
Further, the change rate D _d with respect to the rotation radius of the circumferential movement of the distance d, it is possible to detect the presence of sharp irregularities on the outer peripheral surface 4 that affect the bounce Pesutarora 25.
Furthermore, since the detection sensors 3A to 3C are provided at a plurality of points where the axial positions of the second paper roll R2 are different,
From the difference between the distances d1 and d3, it can be detected that the winding paper is deformed so as to increase in diameter in the axial direction, and the deformation of the second paper roll R2 as described with reference to FIG. 19 is ensured. Can be detected.

As a result, it is possible to detect that the paster roller 25 is effectively pressed only partially in the axial direction of the outer peripheral surface 4 of the second paper roll R2, and the low-speed paper splicing mode or the paper splicing can be canceled in advance.
In addition, the distance detection by the distance sensor 3 is performed from the start of the pre-rotation of the second paper roll R2 until the first black paper detection on signal is generated until the second black paper detection on signal is generated, so that the second paper is reliably detected. The radius detection distance d can be detected continuously over the entire circumference of the outer peripheral surface of the roll R2.

Thereby, it is possible to reduce the labor for detecting the radius detection distance d and to continuously detect the radius detection distance d while the second paper roll R2 rotates at a low speed. Therefore, the radius detection distance d can be detected with higher accuracy.
In addition, there is also an effect that one rotation of the second paper roll R2 can be detected by using the black paper detection sensor 8 which is generally provided in the paper splicing apparatus conventionally and without providing a new detection sensor.

(Modification)
Hereinafter, modifications of the present invention will be described. Note that this modification is mostly the same as that of the embodiment, the description of the same parts as in the embodiment will be omitted, and the same members will be described using the same reference numerals.

  As shown in FIG. 14, in this modified example, instead of the distance sensor 3 in the above-mentioned embodiment as a turning radius detecting means, a peripheral surface following member that displaces following the unevenness of the outer peripheral surface 4 of the second paper roll R2. As a follower pendulum 6 and an angle sensor as a follower member displacement amount detector for detecting a displacement amount (here, displacement angle η) of the follower pendulum 6 at a plurality of locations in the circumferential direction of the outer peripheral surface 4 of the second paper roll R2. 7 is provided. That is, the displacement angle η corresponds to a rotation radius or a value corresponding to the rotation radius that is the distance from the rotation center (rotation axis O) of the second paper roll R2 to the outer peripheral surface 4 of the second paper roll R2.

Further, as shown in FIG. 15, three angle sensors 7A to 7C are arranged at equal intervals in a direction parallel to the rotation axis O of the second paper roll R2 (that is, in the left-right direction).
The angle sensor 7A detects the displacement angle η1 in the vicinity of the left end of the second paper roll R2, the angle sensor 7B detects the displacement angle η2 at the center in the left-right direction of the second paper roll R2, and the angle sensor 7C A displacement angle η3 in the vicinity of the left end of the second paper roll R2 is detected.

  The angle sensors 7A to 7C can continuously detect the respective displacement angles η1 to η3 with respect to the outer peripheral surface 4 of the rotating second paper roll R2 as described later, and a plurality of locations in the circumferential direction of the outer peripheral surface. It is also possible to detect the displacement angles η1 to η3 intermittently. The detection results of these angle sensors 7A to 7C are input to the control device 60.

The control device 60 performs similar control by replacing d1 to d3 in the above-described embodiment with η1 to η3.
Thus, according to the present modification, the difference Δ の between the maximum value and the minimum value of the rotation radius and the change rate Ηη with respect to the circumferential direction can be detected. Further, the maximum value Η ₁₃ of [η1 (θ) −η3 (θ)] can be detected as the difference between the maximum value and the minimum value of the rotation radius at the plurality of axial positions of the second paper roll R2. Thereby, the effect similar to the above-mentioned embodiment can be acquired with the simple structure of detecting the displacement angle (eta) of the tracking pendulum 6 (following member displacement amount detection step).

  In the present modification as well, the second paper roll R2 may be configured to use both the adhesive portion and the black paper portion as shown in FIG.

(Other)
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
In the above embodiment, the radius detection distance d or the displacement angle η is detected while the second paper roll R2 as the next use paper roll is chucked to the support arm 12b. Detection of the rotation radius of the paper or a value corresponding to the rotation radius may be performed in advance before chucking the support arm 12b.

  For example, in the conventional paper splicing device, the paper roll is rotated like the paper roll rotating device in the above-described embodiment in order to rewind the web hanging from the paper roll that has finished feeding the web by the paper splicing. Although the remaining core rewinding motor is installed, the remaining core rewinding is used to rotate the next used paper roll, and the deformation amount of the next used paper roll may be obtained by a distance sensor or an angle sensor. Good.

  In the above-described modification, the following pendulum has been described as an example of the peripheral surface following member. However, as the peripheral surface following member, in addition to this, the uneven surface on the outer peripheral surface of the next use web is followed to the outer peripheral surface. A sliding contact member that is brought into pressure contact with the outer peripheral surface of the next-use winding paper by a spring so as to be in sliding contact is installed as a peripheral surface tracking member, and a means for detecting the displacement amount of the sliding contact member is provided as a tracking member displacement amount detection means. You may do it.

Further, in the above-described embodiment, the rotation radius detection means is provided at three locations near the left and right edges and the center of the next use web, but the rotation radius detection means may be singular or plural, and the installation position Is not limited to the above-described embodiment.
Furthermore, the amount of deformation, which is the degree of deformation from the standard state of the next use web, is appropriately determined as long as the degree of deformation from the standard state of the next use web can be determined based on the detection result of the rotation radius. Applicable. For example, in the above-described embodiment, the difference between the maximum value and the minimum value of the rotation radius (ΔD, ΔΗ), the rate of change of the rotation radius with respect to the circumferential movement (D _d , Ηη), or the above-mentioned at a plurality of axial positions. Any difference (D ₁₃ , Η ₁₃ ) between the maximum value and the minimum value of the turning radius is calculated, but these changes can be omitted as appropriate.

It is a flowchart for demonstrating the offset rotary printing press which concerns on one Embodiment of this invention, Comprising: It is a flowchart which shows the operation | movement procedure concerning paper splicing. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view illustrating an overall schematic configuration for explaining an offset rotary printing press according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view schematically illustrating a configuration of a paper feeding device and a paper splicing device for explaining an offset rotary printing press according to an embodiment of the present invention. FIG. 2 is a diagram for explaining an offset rotary printing press according to an embodiment of the present invention and schematically showing the periphery of a second paper roll in a top view. It is a figure for demonstrating the offset rotary printing press which concerns on one Embodiment of this invention, Comprising: It is a figure which shows a 2nd paper roll typically by a top view. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram schematically illustrating a configuration of a main part of a paper splicing mechanism for explaining an offset rotary printing press according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view schematically illustrating a configuration around a second paper roll including a paper roll rotating device for explaining an offset rotary printing press according to an embodiment of the present invention. FIG. 4 is a view for explaining an offset rotary printing press according to an embodiment of the present invention, and showing a state in which a base plate has moved to a paper splicing position with respect to FIG. 3. BRIEF DESCRIPTION OF THE DRAWINGS It is for demonstrating the offset rotary printing press which concerns on one Embodiment of this invention, Comprising: (A)-(C) are all function graphs which show the detection result of a distance sensor. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a graph for explaining an offset rotary printing press according to an embodiment of the present invention, in which (A) and (B) are graphs showing temporal changes in feeding speed in a low-speed paper splicing mode. FIG. 3 is a flowchart illustrating a subroutine executed in FIG. 1 for explaining an offset rotary printing press according to an embodiment of the present invention. FIG. 3 is a flowchart illustrating a subroutine executed in FIG. 1 for explaining an offset rotary printing press according to an embodiment of the present invention. FIG. 3 is a flowchart illustrating a subroutine executed in FIG. 1 for explaining an offset rotary printing press according to an embodiment of the present invention. FIG. 9 is a side view schematically illustrating the configuration of a paper feeding device and a paper splicing device for explaining an offset rotary printing press according to a modification of the present invention. FIG. 10 is a diagram for explaining an offset rotary printing press according to a modification of the present invention, and schematically showing the periphery of a second paper roll in a top view. It is for demonstrating a prior art, Comprising: It is a figure which shows typically the principal part structure of a paper splicing apparatus. FIG. 10 is a schematic diagram illustrating the behavior of a paster roller when an outer peripheral portion of a paper roll is deformed, for explaining a conventional technique. It is a figure for demonstrating a prior art, Comprising: It is a figure which shows typically an example of the deformation | transformation aspect of a paper roll by a side view. It is for demonstrating a prior art, Comprising: It is a figure which shows typically an example of the deformation | transformation aspect of a paper roll by a top view.

Explanation of symbols

1, W1, W2 Web 2 Paper splicing mechanism 3, 3A-3C Distance sensor (turning radius detection means, distance detection means)
4 Outer peripheral surfaces 4B and 4D of the second paper roll Adhesive part 4C Black paper part 5 Paper roll rotating device (pre-rotating means)
6 Tracking pendulum (circumferential tracking member)
7, 7A-7C Angle sensor (turning radius detection means, follow-up member displacement amount detection means)
8 Black paper detection sensor 11 Main shaft 12a, 12b Support arm 13, 14 Roll support shaft 15 Base plate 16, 17 Air cylinder 18, 19, 20 Guide roller 21, 22 Guide rail 23 Slide plate 24 Drive motor 25 Paster roller 25A Paster arm 25B Air cylinder 26, 27 Guide roller 28 Cutter 31 Motor 32 Belt gear section 33 Drive shaft 33
34 Clutch 34 Projection 35 Clutch plate 35A Engagement hole 50 Offset rotary printing press 51 Paper feed device 52 Infeed device 52A Infeed roller (web feeding means)
53 Printing device 54 Dryer device 55 Cooling device 56 Web pass device 57 Folding device 60 Control device (deformation amount calculating means, paper splicing control means and paper splicing stopping means)
R1 First paper roll (currently used paper roll, current used paper roll)
R2 Second paper roll (next use paper roll, next use roll)

Claims (24)

A paper splicing method for performing paper splicing by pressing a web fed at an arbitrary feeding speed from a currently used web with a paster roller against an adhesive portion formed on the web of the next web used,
Rotation radius detection step of detecting a rotation radius that is a distance from the rotation center of the next use web to the outer circumference of the next use web or a value corresponding to the rotation radius at a plurality of locations in the circumferential direction of the outer circumference. When,
A deformation amount calculating step of calculating a deformation amount that is a degree of deformation from a reference state of the next use web, based on the rotation radius detected in the rotation radius detection step or a value corresponding to the rotation radius;
When the deformation amount calculated in the deformation amount calculating step is larger than a first predetermined value set in advance, a paper splicing step for performing the paper splicing with the feeding speed being lower than a reference speed; A paper splicing method characterized by comprising: When the deformation amount calculated in the deformation amount calculating step is larger than a second predetermined value that is set in advance as a value larger than the first predetermined value, the paper splicing in the paper splicing step is performed. The paper splicing method according to claim 1, further comprising a paper splicing canceling step for canceling the paper splicing. The paper splicing method according to claim 1 or 2, wherein, in the deformation amount calculating step, a difference between a maximum value and a minimum value of the rotation radius or a value corresponding to the rotation radius is calculated as the deformation amount. . 4. The deformation amount calculating step according to claim 1, wherein a rate of change of the rotation radius or a value corresponding to the rotation radius with respect to a circumferential movement is calculated as the deformation amount. 5. Paper splicing method. In the rotation radius detection step, the rotation radius or a value corresponding to the rotation radius is detected at a plurality of locations in the circumferential direction of the outer peripheral surface at a plurality of different axial positions of the next use web. The paper splicing method according to any one of claims 1 to 4. In the deformation amount calculating step, the difference between the rotation radius or the maximum value and the minimum value corresponding to the rotation radius at the plurality of axial positions at the same circumferential position of the next web is determined as the deformation. The paper splicing method according to claim 5, wherein the paper splicing method is calculated as a quantity. The rotation radius detection step includes a distance detection step of detecting a distance from a predetermined measurement position to the outer peripheral surface of the next use web at a plurality of locations in a circumferential direction of the outer peripheral surface. Item 7. The paper splicing method according to any one of Items 1 to 6. The paper splicing method according to claim 7, wherein in the distance detection step, distances from the measurement position to the outer peripheral surface are detected at a plurality of different axial positions of the web. In the rotation radius detection step, the amount of displacement of the circumferential surface follower member that contacts the outer circumferential surface of the next-use winding paper and displaces following the unevenness of the outer circumferential surface is determined at a plurality of locations in the circumferential direction of the outer circumferential surface. The paper splicing method according to any one of claims 1 to 6, wherein the following member displacement amount detecting step is performed. The paper splicing method according to claim 9, wherein in the tracking member displacement amount detection step, the displacement amounts of the circumferential surface tracking members are detected at a plurality of different axial positions of the web. Prior to performing the paper splicing, a pre-rotation step of pre-rotating the next use web winding so that the peripheral speed of the next web winding is equal to the feeding speed at the time of paper splicing,
The paper splicing method according to claim 1, wherein the rotation radius detection step is executed simultaneously in the pre-rotation step. Web feeding means for feeding the web from the currently used winding paper at an arbitrary feeding speed, and pressing the web being fed from the currently used winding paper against the adhesive portion formed on the web of the next used winding paper A paper splicing device having a paster roller,
Rotation radius detection means for detecting a rotation radius that is a distance from the rotation center of the next use web to the outer circumference of the next use web or a value corresponding to the rotation radius at a plurality of locations in the circumferential direction of the outer circumference. When,
A deformation amount calculating means for calculating a deformation amount that is a degree of deformation from a reference state of the next use web based on the rotation radius or a value corresponding to the rotation radius;
When the deformation amount calculated by the deformation amount calculating means is larger than a first predetermined value set in advance, the paper for performing the splicing with the feeding speed by the web feeding means being lower than a reference speed A paper splicing device comprising a splicing control means. When the deformation amount calculated by the deformation amount calculating unit is larger than a second predetermined value set in advance as a value larger than the first predetermined value, the paper splicing for stopping the paper splicing is performed. 13. The paper splicing device according to claim 12, further comprising a canceling unit. The deformation amount calculating means calculates, as the deformation amount, a difference between a maximum value and a minimum value of the rotation radius detected by the rotation radius detection means or a value corresponding to the rotation radius. Item 14. The paper splicer according to Item 12 or 13. 13. The deformation amount calculating unit calculates the rate of change of the rotation radius detected by the rotation radius detection unit or a value corresponding to the rotation radius with respect to circumferential movement as the deformation amount. The paper splicing apparatus of any one of -14. The rotation radius detection means is configured to detect the rotation radius or a value corresponding to the rotation radius at a plurality of locations in the circumferential direction of the outer peripheral surface at a plurality of different axial positions of the next use web. The paper splicing device according to any one of claims 12 to 15, wherein the paper splicing device is provided. The deformation amount calculating means calculates the difference between a maximum value and a minimum value of the rotation radius or a value corresponding to the rotation radius at the plurality of axial positions at the same circumferential position of the next web. The splicing device according to claim 16, wherein the splicing device is calculated as a quantity. The rotation radius detection means is a distance detection means that is disposed at a predetermined measurement position and detects the distance from the measurement position to the outer peripheral surface of the next use web at a plurality of locations in the circumferential direction of the outer peripheral surface. The paper splicing device according to claim 12, wherein the paper splicing device is provided. The paper splicing device according to claim 18, wherein the distance detecting unit detects distances from the measurement position to the outer peripheral surface with respect to a plurality of different axial positions of the web. The turning radius detecting means includes
A peripheral surface follower member that contacts the outer peripheral surface of the next-use wound paper and displaces following the unevenness of the outer peripheral surface;
The paper according to any one of claims 12 to 17, comprising: a follower member displacement amount detecting means for detecting a displacement amount of the peripheral surface follower member at a plurality of locations in a circumferential direction of the outer peripheral surface. Joint device. A plurality of the circumferential surface following members are provided at different axial positions of the web,
21. The paper splicing device according to claim 20, wherein the follower member displacement amount detection means detects displacement amounts of the plurality of peripheral surface follower members at a plurality of locations in a circumferential direction of the outer peripheral surface. Before the paper splicing control means performs the paper splicing, the pre-rotating means for rotationally driving the next-use winding paper so that the peripheral speed of the next-use winding paper becomes equal to the feeding speed by the web feeding means. Have
The rotation radius detection means detects the rotation radius or a value corresponding to the rotation radius at a plurality of locations in the circumferential direction of the outer peripheral surface with respect to the next use web wound rotationally driven by the pre-rotation means. The paper splicing device according to any one of claims 12 to 21, characterized in that: A paper feeding device that feeds a web, which is a belt-like continuous paper, to the subsequent stage without interruption,
A paper feeding device comprising the paper splicing device according to any one of claims 12 to 22. An offset rotary printing press that performs printing on a web fed from a paper feeding device,
An offset rotary printing press, wherein the paper feeding device is the paper feeding device according to claim 23.

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