JP2009233982A - Roller deformation detecting apparatus and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress deterioration of printing quality as well as suppressing increase in product cost by properly grasping a time of exchanging rubber rollers, in a roller deformation detecting apparatus and its method. <P>SOLUTION: On an ink supply route for feeding ink from ink jars 22, 42 as the supply source to plate cylinders 35, 55, and on a dampening water supply route for feeding dampening water from spray dampeners 81, 91 as the supply source to the plate cylinders 35, 55, there is installed nip pressure automatic regulators 37, 38, 57, 58, 82, 92 that freely rotatably support rubber rollers and metallic rollers in an abutting state and that are capable of varying the abutting state, wherein a controller 61 measures roller deformation quantity on the basis of roller position information in moving rubber rollers to stand-by positions, by the nip pressure automatic regulators 37, 38, 57, 58, 82, 92. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a roller deformation detection apparatus and method for detecting the degree of deformation of a roller in a printing machine in which a part of the roller can change the contact state with an adjacent roller.

  For example, a web offset press for newspapers is composed of a plurality of paper feeding devices, a plurality of printing units, a turn bar device, and a folding machine, and when a web is supplied from each paper feeding device to the printing unit. After each web is printed, the turn route device changes the travel route of the plurality of webs, and after the webs are overlapped in a predetermined order, the webs are vertically folded by a folding machine to a predetermined length. Then, the sheet is cut horizontally and folded to form a signature, and the sheet is discharged.

  A printing unit in such a web offset press for newspaper includes a large number of rollers for supplying ink to the plate cylinder in addition to a blanket cylinder and a plate cylinder on both the left and right sides of the vertically conveyed web. Each roller group is arranged. That is, an ink fountain, an ink fountain roller, a delivery roller, a kneading roller, a reciprocating roller, and an ink application roller are arranged in series in contact with each other. A group of rollers for supplying the fountain solution is also arranged, and the fountain solution supply device, the reciprocating roller, the kneading roller, and the swimsuit roller are arranged in series in contact with each other. A plate is mounted on the surface of the plate cylinder, and an ink application roller and a swim roller are in contact with the plate cylinder, and the plate cylinder is in contact with the blanket cylinder.

  Therefore, when the ink fountain roller is rotated, the ink whose supply amount is adjusted by the ink fountain roller is supplied from the ink fountain to the delivery roller, kneaded by the kneading roller, spread in the axial direction by the reciprocating roller, and then the ink is applied. Passed to Laura. At the same time, the dampening water whose supply amount is adjusted by the dampening water supply device is spread in the axial direction by the reciprocating roller, kneaded by the kneading roller, and then delivered to the swimsuit roller. Then, the ink and dampening water formed on the thin film from the ink application roller and the swim roller are supplied to the plate surface of the plate cylinder, the ink adhering to the plate surface is transferred to the blanket cylinder, and the web between the opposite blanket cylinder is transferred to the web. Is sandwiched, a predetermined printing pressure is applied to the web, and the ink of each blanket cylinder is transferred to both sides of the web as a pattern.

  As described above, the ink is transferred from the ink fountain to the ink fountain roller, delivery roller, kneading roller, reciprocating roller, ink application roller, plate cylinder, and blanket cylinder, and transferred from the blanket cylinder to the web. On the other hand, the dampening water is delivered from the dampening water supply device to the reciprocating roller, the kneading roller, the swimsuit roller, the plate cylinder, and the blanket cylinder. In this case, when the ink or the fountain solution is transferred between the rollers, it is generally preferable that about half of the ink or the fountain solution formed on the surface of the roller is transferred to the contacting roller. For this reason, it is necessary to appropriately adjust the nip pressure between the rollers in contact with each other. That is, in order to improve the quality of printing by adjusting the supply amount of ink and dampening water, it is necessary to optimize the nip pressure between adjacent rollers. An adjustment mechanism is provided.

  As conventional nip pressure adjusting mechanisms, there are those described in Patent Documents 1 and 2 below. The nip pressure adjusting mechanism described in Patent Document 1 applies elastic force toward the fixed first roll and the second roll to the movable third roll, and the first roll and the second roll. After forming an initial nip pressure between the first roll and the second roll, the third roll is rotated to adjust the nip pressure of the nip portion with the second roll, and the third roll is rotated to nip the nip portion with the first roll. Make adjustments. In addition, the nip pressure adjusting mechanism described in Patent Document 2 is configured to move the roller in the radial direction via the roller support and expand or contract the pressure hose by supplying and discharging air, The nip pressure is adjusted.

JP 2007-326278 A Japanese Patent No. 3853739

  As described above, in the conventional nip pressure adjusting mechanism, the rubber roller (kneading roller, ink application roller, swimsuit roller) is replaced with the metal roller (delivery roller, reciprocating roller, Press the cylinder). If this rubber roller is used over a long period of time, it deteriorates due to shrinkage of the outer diameter due to an increase in surface hardness, wear, etc., and therefore it is necessary to replace it periodically.

  Conventionally, the timing for replacing the rubber roller is often determined based on the performance of the manufacturer or the experience of the user. However, since the degree of deterioration of the rubber roller varies depending not only on the period of use but also on the usage environment and storage form, it is difficult to properly determine the replacement timing of the rubber roller. If the replacement timing of the rubber roller is delayed, an appropriate nip pressure cannot be maintained, and the ink and dampening water between the rollers are insufficiently transferred, resulting in a decrease in print quality. On the other hand, if the replacement timing of the rubber roller is too early, the rubber roller that can still be used sufficiently is discarded, and there is a problem that the replacement cost of the rubber roller increases.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and a roller deformation detection device and method capable of suppressing a decrease in print quality and suppressing an increase in product cost by properly grasping the replacement timing of the rubber roller. The purpose is to provide.

  In order to achieve the above object, the roller deformation detection device according to the first aspect of the present invention is a printing machine in which a rubber roller and a metal roller are rotatably supported in contact with each other, and the rubber roller is placed in a standby position set in advance. A roller moving means that can move between a contact position that makes contact with the metal roller, and a roller deformation amount based on roller position information when the rubber roller is moved to a standby position or a contact position by the roller moving means. And a roller deformation amount measuring means for measuring.

  In the roller deformation detection device according to a second aspect of the invention, the roller deformation amount measuring means measures the roller deformation amount based on initial roller position information on the rubber roller and roller position information after a predetermined period of time has elapsed. Yes.

  In the roller deformation detecting device of the invention of claim 3, the roller moving means is an automatic nip pressure adjusting device for automatically adjusting a nip pressure between the rollers in contact with each other, and the roller deformation amount measuring means is the nip pressure. A roller deformation amount is measured based on roller position information when the rubber roller is moved to an optimum nip position by an automatic adjustment device.

  In the roller deformation detection device according to a fourth aspect of the present invention, the roller deformation amount measuring means measures the roller deformation amount based on an initial optimum nip position in the rubber roller and an optimum nip position after a predetermined period. Yes.

  In the roller deformation detection device according to claim 5, the roller deformation amount measuring means measures the roller deformation amount based on a roller shaft center position when the rubber roller is moved to the contact position by the roller moving means. It is characterized by.

  In the roller deformation detecting device according to the invention of claim 6, the roller deformation amount measuring means measures the roller deformation amount based on a roller outer peripheral position when the roller moving means moves the rubber roller to a standby position. It is said.

  The roller deformation detection device according to a seventh aspect of the invention is characterized in that there is provided roller replacement time determination means for determining the replacement time of the rubber roller based on the roller deformation amount measured by the roller deformation amount measurement means.

  According to another aspect of the present invention, in the printing machine in which the rubber roller and the metal roller are rotatably supported in contact with each other, the rubber roller is brought into contact with the preset standby position and the metal roller. The roller deformation amount is measured based on roller position information when moving between the contact positions.

  The roller deformation detection method for a printing press according to claim 9 is characterized in that the amount of roller deformation is measured based on initial roller position information on the rubber roller and roller position information after a predetermined period of time has elapsed.

  The roller deformation detection method for a printing press according to claim 10 is characterized in that a roller deformation amount is measured based on an initial optimum nip position in the rubber roller and an optimum nip position after a predetermined period.

  According to the roller deformation detection device of the first aspect of the present invention, the rubber roller and the metal roller are rotatably supported in the contact state, and the rubber roller is set between the preset standby position and the contact position for contacting the metal roller. And a roller deformation amount measuring means for measuring the roller deformation amount based on roller position information when the rubber roller is moved to the standby position or the contact position. When the outer diameter of the rubber roller is deformed due to wear or an increase in hardness, when the rubber roller is moved to the standby position or the contact position, the new roller and the deformed roller have different axes and outer peripheral positions. Therefore, by measuring the amount of roller deformation when the rubber roller is moved to the standby position or the contact position, it is possible to properly grasp the replacement time of the rubber roller. As a result, it is possible to replace the rubber roller at the appropriate time. In addition, it is possible to suppress a decrease in print quality and to suppress an increase in product cost.

  According to the roller deformation detection device of the second aspect of the invention, the roller deformation amount measuring means measures the roller deformation amount based on the initial roller position information on the rubber roller and the roller position information after the lapse of a predetermined period. With the configuration, the deformation amount of the roller can be easily detected.

  According to the roller deformation detecting device of the third aspect of the invention, as the roller moving means, the automatic nip pressure adjusting device for automatically adjusting the nip pressure between the rollers in contact with each other is provided, and the roller deformation amount measuring means adjusts the nip pressure automatically. The roller deformation amount is measured based on the roller position information when the rubber roller is moved to the optimum nip position by the device. Therefore, the roller deformation amount in the rubber roller can be measured when adjusting the nip pressure between the contacting rollers. It is possible to simplify the amount detection operation.

  According to the roller deformation detecting device of the invention of claim 4, the roller deformation amount measuring means measures the roller deformation amount based on the initial optimum nip position in the rubber roller and the optimum nip position after the lapse of a predetermined period. The amount of deformation can be detected with high accuracy.

  According to the roller deformation detecting device of the fifth aspect of the invention, the roller deformation amount measuring means measures the roller deformation amount based on the position of the roller shaft center when the rubber roller is moved to the contact position. Can be easily detected, and the measurement work for the roller deformation amount can be simplified.

  According to the roller deformation detecting device of the sixth aspect of the invention, the roller deformation amount measuring means measures the roller deformation amount based on the roller outer peripheral position when the rubber roller is moved to the standby position, so that the metal roller becomes an obstacle. The roller deformation amount of the rubber roller can be easily measured.

  According to the roller deformation detecting device of the seventh aspect of the invention, since the roller replacement time determining means for determining the replacement time of the rubber roller based on the roller deformation amount measured by the roller deformation amount measuring means is provided, It is possible to easily determine the replacement time of the rubber roller, reduce the burden on the operator, and replace the rubber roller at an appropriate time.

  According to the roller deformation detection method of the invention of claim 8, the rubber roller and the metal roller are rotatably supported in a contact state, and the standby position where the rubber roller is in contact with the metal roller is set in advance. The roller deformation amount is measured based on the roller position information when moving between the two. Therefore, by measuring the amount of roller deformation when moving the rubber roller to the standby position or the contact position, it is possible to properly grasp the replacement time of the rubber roller, and as a result, by replacing the rubber roller at the appropriate time, It is possible to suppress a decrease in print quality and to suppress an increase in product cost.

  According to the roller deformation detection method for a printing press according to claim 9, since the roller deformation amount is measured based on the initial roller position information on the rubber roller and the roller position information after a predetermined period has elapsed, the deformation amount of the roller with a simple configuration. Can be easily detected.

  According to the roller deformation detection method for a printing press according to claim 10, since the roller deformation amount is measured based on the initial optimum nip position of the rubber roller and the optimum nip position after a predetermined period has elapsed, the nip pressure adjustment between the contacting rollers is performed. Sometimes, it is possible to measure the amount of deformation of the roller in the rubber roller, simplify the operation of detecting the amount of deformation of the roller, and detect the amount of deformation of the rubber roller with high accuracy.

  Exemplary embodiments of a roller deformation detection apparatus and method according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example.

  FIG. 1 is a schematic configuration diagram of a printing unit in a newspaper offset rotary printing press according to an embodiment of the present invention, FIG. 2 is a sectional view of a nip pressure automatic adjusting device, and FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is a schematic configuration diagram illustrating a roller deformation detection device according to the present embodiment, FIG. 5 is a schematic diagram illustrating a roller deformation detection method according to the present embodiment, and FIG. 6 illustrates a roller deformation detection method according to the present embodiment. FIG. 7A to FIG. 7B are explanatory diagrams illustrating a detection procedure by the roller deformation detection device of the present embodiment, and FIG. 8 is a schematic diagram illustrating a newspaper offset rotary printing press of the present embodiment. .

  In this embodiment, as shown in FIG. 8, the newspaper offset rotary printing press applied as an offset rotary printing press includes a paper feeding device 11, a printing device 12, a turn bar device 13, and a folding machine 14. Has been. The paper feeding device 11 is provided with a plurality of holding arms 15 for holding three webs R each of which a web (sheet) W is wound in a roll shape, and by rotating each holding arm 15, The web R can be rotated to the paper feed position. Further, the paper feeding device 11 is provided with a paper splicing device (not shown), and when the web R fed out at the paper feeding position becomes small, the paper splicing device causes the paper web R at the paper feeding position to be removed. The web R in the standby position can be spliced.

  Further, the printing apparatus 12 is provided with a multicolor printing unit 16 that performs double-sided four-color printing and a two-color printing unit 17 that performs double-sided two-color printing. The multi-color printing unit 16 and the two-color printing unit 17 can perform predetermined printing on the web W supplied from the paper feeding device 11. In the present embodiment, the printing apparatus 12 includes the multi-color printing unit 16 and the two-color printing unit 17, but the present invention is not limited to this configuration. For example, various units may be used in combination as appropriate according to the printed matter, such as a double-sided single-color printing unit that performs single-sided printing on both sides and a multi-color printing unit that performs 4-color or 2-color printing on one side.

  Further, the turn bar device 13 is provided with a plurality of turn bars (not shown), and the travel route of each web W sent from each printing unit 16, 17 can be changed and superposed in a predetermined order. The folding machine 14 vertically folds the web W conveyed from the turn bar device 13, cuts the web W by a predetermined length, further folds it horizontally to form a desired fold, and then discharges the paper.

  Therefore, first, when the web W is supplied from the paper feeding device 11 to the multicolor printing unit 16 or the two-color printing unit 17 constituting the printing device 12, the printing units 16 and 17 each print four colors on the web W. And two-color printing. Next, the plurality of webs W printed by the printing units 16 and 17 are overlapped in a predetermined order while the travel route is changed by the turn bar device 13. The plurality of webs W overlapped are conveyed to the folding machine 14, where they are vertically folded, then laterally cut, and further folded laterally to form a desired crease, which is then placed on the paper discharge conveyor by the impeller. The paper is ejected.

  Here, the printing units 16 and 17 in the printing apparatus 12 described above will be described. Since the roller arrangements of the printing units 16 and 17 are substantially the same, only the multicolor printing unit and 16 will be described in detail. The printing unit 16 can perform four-color printing, and the roller arrangement of each color is substantially the same. Therefore, only one roller arrangement will be described in detail.

  In the printing unit 16, as shown in FIG. 1, rollers are arranged symmetrically with respect to the conveyance path of the web W along the vertical direction, and the left side performs surface printing with respect to the conveyance path of the web W. The front surface printing unit 21 performs printing, and the right side is a back surface printing unit 41 that performs back surface printing.

  The front surface printing unit 21 includes an ink fountain (ink supply device) 22, an ink source roller 23, a delivery roller 24, three kneading rollers 25, 26, 27, three reciprocating rollers 28, 29, 30, 3 The two ink forming rollers 31, 32, 33, the plate cylinder 35, and the blanket cylinder 36 are configured so as to be rotatably supported in contact with each other in series. Further, the front surface printing unit 21 is provided with a dampening water supply device that supplies dampening water. That is, a swimsuit roller 34 is rotatably supported by contacting the plate cylinder 35, and a reciprocating roller 30 is rotatably supported by contacting the swimsuit roller 34. A gate 81 is provided. The spray dampener 81 is configured by arranging a plurality of spray nozzles along the axial direction of the reciprocating roller 30, and sprays dampening water into a fan shape and applies it to the reciprocating roller 30.

  That is, the ink fountain 22 stores ink of a predetermined viscosity set in advance, and an ink base roller 23 is provided adjacent to the ink fountain 22. The ink fountain roller 23 kneads ink metered by an ink key (not shown) of the ink fountain 22, has a surface formed of metal, and is rotatably supported by a frame (not shown). The ink base roller 23 can be driven to rotate in the direction of the arrow by a driving device (not shown).

  The delivery roller 24 delivers ink from the ink source roller 23, has a surface formed of metal or resin, and is rotatably supported by the frame so as to contact the ink source roller 23. The kneading roller 25 kneads the ink delivered from the delivery roller 24, has a surface formed of rubber, and is rotatably supported by the frame so as to contact the delivery roller 24. The reciprocating roller 28 spreads the ink kneaded by the kneading roller 25 in the width direction, has a surface formed of metal, is rotatably supported by the frame so as to contact the kneading roller 25, and is axially Can be moved back and forth. The other kneading roller 26 kneads ink transferred between adjacent rollers, and the kneading roller 27 kneads dampening water transferred between adjacent rollers, and has a rubber surface. And is rotatably supported by the frame so as to be in contact with adjacent rollers. The other reciprocating roller 29 expands the ink transferred between adjacent rollers in the width direction, and the reciprocating roller 30 expands the ink transferred between adjacent rollers in the width direction. Is made of metal, is rotatably supported by the frame so as to be in contact with adjacent rollers, and is reciprocally movable in the axial direction.

  The ink application rollers 31, 32, 33 and the swim application roller 34 receive and supply ink spread by the reciprocating rollers 28, 29 or dampening water expanded by the reciprocating roller 30, and have a rubber surface. And is rotatably supported by the frame so as to be in contact with the reciprocating rollers 28, 29, and 30. The delivery roller 24, the kneading rollers 25, 26, and 27, the reciprocating rollers 28, 29, and 30, the ink deposition rollers 31, 32, and 33, and the swimsuit roller 34 are coupled and driven in synchronization by a gear (not shown). The device can be driven to rotate in the direction of the arrow.

  The plate cylinder 35 is a metal roller around which a printing plate (not shown) is wound, and the ink application rollers 31, 32, 33 and the ink of the swimsuit roller 34 are transferred to the image line portion of the printing plate, The ink adhering rollers 31, 32, 33 and the swimsuit roller 34 are rotatably supported by the frame so as to be in contact with each other. The blanket cylinder 36 is a rubber roller around which a blanket (rubber) (not shown) is wound. The blanket cylinder 36 transfers ink transferred from the plate cylinder 35 to the web W, and is attached to the frame so as to come into contact with the plate cylinder 35. It is supported rotatably. The plate cylinder 35 and the blanket cylinder 36 are coupled so as to be synchronously driven by a gear (not shown), and can be driven to rotate in the direction of the arrow by a driving device.

  In this case, the printing plate mounted on the plate cylinder 35 is formed with an area with a pattern (image area) and an area without an image (non-image area), and the image area is oleophilic and non-image area. The part is hydrophilic. Therefore, when ink is supplied from the ink application rollers 31, 32, 33 to the printing plate mounted on the plate cylinder 35 and dampening water is supplied from the swim roller 34, the ink is applied only to the image line portion. Is transferred, and dampening water is transferred to the non-image area. When the blanket cylinder 36 comes into contact with the plate cylinder 35 and rotates synchronously, the ink in the image line portion is transferred from the plate cylinder 35 to the blanket cylinder 36.

  On the other hand, the back surface printing unit 41 has the same configuration, and an ink fountain (ink supply device) 42, an ink source roller 43, a delivery roller 44, three kneading rollers 45, 46 and 47, and three reciprocations. The rollers 48, 49, and 50, the three ink deposition rollers 51, 52, and 53, the plate cylinder 55, and the blanket cylinder 56 are configured so as to be rotatably supported in contact with each other in series. Further, the front surface printing unit 41 is provided with a dampening water supply device that supplies dampening water. That is, a swimsuit roller 54 is rotatably supported in contact with the plate cylinder 55, and a reciprocating roller 50 is rotatably supported in contact with the swimsuit roller 54. A gate 91 is provided. The spray dampener 91 is configured by arranging a plurality of spray nozzles along the axial direction of the reciprocating roller 50, and sprays dampening water into a fan shape and applies it to the reciprocating roller 50.

  That is, the ink fountain 42 stores ink of a predetermined viscosity set in advance, and an ink base roller 43 is provided adjacent to the ink fountain 42. The ink fountain roller 43 kneads ink metered by an ink key (not shown) of the ink fountain 42, has a surface formed of metal, and is rotatably supported by a frame (not shown). The ink base roller 43 can be driven to rotate in the direction of the arrow by a driving device (not shown).

  The delivery roller 44 delivers ink from the ink source roller 43, has a surface formed of metal or resin, and is rotatably supported by the frame so as to contact the ink source roller 43. The kneading roller 45 kneads the ink delivered from the delivery roller 44, has a surface formed of rubber, and is rotatably supported by the frame so as to contact the delivery roller 44. The reciprocating roller 48 spreads the ink kneaded by the kneading roller 45 in the width direction, has a surface formed of metal, is rotatably supported by the frame so as to be in contact with the kneading roller 45, and is axially Can be moved back and forth. The other kneading roller 46 kneads ink passed between adjacent rollers, and the kneading roller 47 kneads dampening water passed between adjacent rollers, and the surface is formed of rubber. And is rotatably supported by the frame so as to be in contact with adjacent rollers. The other reciprocating roller 49 expands the ink transferred between adjacent rollers in the width direction, and the reciprocating roller 50 expands the ink transferred between adjacent rollers in the width direction. Is made of metal, is rotatably supported by the frame so as to be in contact with adjacent rollers, and is reciprocally movable in the axial direction.

  The ink applying rollers 51, 52 and 53 and the swim roller 54 receive and supply ink spread by the reciprocating rollers 48 and 49 or dampening water spread by the reciprocating roller 50, and have a rubber surface. And is rotatably supported by the frame so as to be in contact with the reciprocating rollers 48, 49, and 50. The delivery roller 44, the kneading rollers 45, 46, 47, the reciprocating rollers 48, 49, 50, the ink application rollers 51, 52, 53, and the swimsuit roller 54 are connected and driven in synchronization by a gear (not shown). The device can be driven to rotate in the direction of the arrow.

  The plate cylinder 55 is a metal roller on which a printing plate (not shown) is wound on the surface, and the ink application rollers 51, 52, 53 and the ink of the bathing roller 54 are transferred to the image line portion of the printing plate, It is rotatably supported by the frame so as to be in contact with the ink deposition rollers 51, 52, 53 and the swimsuit roller 54. The blanket cylinder 56 is a rubber roller around which a blanket (rubber) (not shown) is wound. The blanket cylinder 56 transfers ink transferred from the plate cylinder 55 to the web W, and is attached to the frame so as to come into contact with the plate cylinder 55. It is supported rotatably. The plate cylinder 55 and the blanket cylinder 56 are coupled so as to be synchronously driven by a gear (not shown), and can be driven to rotate in the direction of the arrow by a driving device.

  Accordingly, the ink metered by the ink source roller 23 in the surface printing unit 21 is supplied from the ink fountain 22 to the delivery roller 24 through the ink source roller 23. The ink supplied to the delivery roller 24 is delivered to the reciprocating roller 28 through the kneading roller 25, and the reciprocating roller 28 is reciprocated in the axial direction to be spread in the width direction. Further, the ink spread in the width direction by the reciprocating roller 28 is transferred to the reciprocating roller 29 through the kneading roller 26, and the reciprocating roller 29 is reciprocated in the axial direction to be further expanded in the width direction.

  The ink spread in the width direction by the reciprocating rollers 28 and 29 is supplied to the ink forming rollers 31, 32, and 33, and the ink forming rollers 31, 32, and 33 are rotated. , 32, 33 are transferred to the plate surface of the plate cylinder 35. At this time, the ink on the ink application rollers 31, 32, 33 is applied only to the image line portion of the printing plate mounted on the plate cylinder 35. Transcribed. On the other hand, the spray dampener 81 applies dampening water atomized in a fan shape to the reciprocating roller 30, and is transferred to only the non-image portion of the printing plate mounted on the plate cylinder 35 through the swimsuit roller 34. Then, when the plate cylinder 35 rotates, the ink in the image line portion of the printing plate is transferred to the blanket cylinder 36.

  On the other hand, the ink metered by the ink source roller 43 in the back surface printing unit 41 is supplied from the ink fountain 42 to the delivery roller 44 through the ink source roller 43. The ink supplied to the delivery roller 44 is delivered to the reciprocating roller 48 through the kneading roller 45, and the reciprocating roller 48 is reciprocated in the axial direction to be spread in the width direction. Further, the ink spread in the width direction by the reciprocating roller 48 is transferred to the reciprocating roller 49 through the kneading roller 46, and the reciprocating roller 49 reciprocates in the axial direction to further spread in the width direction.

  The ink spread in the width direction by the reciprocating rollers 48 and 49 is supplied to the ink forming rollers 51, 52 and 53, and the ink forming rollers 51, 52 and 53 are rotated to rotate the ink forming rollers 51. , 52, 53 are transferred to the plate surface of the plate cylinder 55. At this time, the ink on the ink application rollers 51, 52, 53 is applied only to the image line portion of the printing plate mounted on the plate cylinder 55. Transcribed. On the other hand, the spray dampener 91 applies dampening water atomized in a fan shape to the reciprocating roller 50, and is transferred to only the non-image area of the printing plate mounted on the plate cylinder 55 through the swimsuit roller 54. Then, when the plate cylinder 55 rotates, the ink in the image line portion of the printing plate is transferred to the blanket cylinder 56.

  Thereafter, when the web W passes between the blanket cylinders 36 and 56, the ink (picture) transferred to the blanket cylinders 36 and 56 by the printing pressure is transferred to the front and back of the web W. That is, the ink on the blanket cylinder 36 is transferred to the front surface of the web W, and the ink on the blanket cylinder 56 is transferred to the back surface of the web W, whereby double-sided printing on the web W is performed.

  Thereafter, when the web W passes between the blanket cylinders 36 and 56, the ink (picture) transferred to the blanket cylinders 36 and 56 by the printing pressure is transferred to the front and back of the web W. That is, the ink on the blanket cylinder 36 is transferred to the front surface of the web W, and the ink on the blanket cylinder 56 is transferred to the back surface of the web W, whereby double-sided printing on the web W is performed.

  In the printing unit 16 configured as described above, in this embodiment, in the front surface printing unit 21, the kneading rollers 25, 26, and 27, the ink applying rollers 31, 32, and 33, the swimsuit roller 34, and the adjacent rollers. As the roller moving means capable of changing the contact state with the nip pressure automatic adjusting device 37, 38, 82 is provided. Further, in the back surface printing unit 41, as a roller moving means capable of changing the contact state between the kneading rollers 45, 46, 47 and the ink applying rollers 51, 52, 53, the swimsuit roller 54, and each adjacent roller, a nip Automatic pressure adjusting devices 57, 58 and 92 are provided. Then, at the end of printing, the nip pressure automatic adjusting devices 37, 38, 57, 58, 82, 92 cause the kneading rollers 25, 26, 27, 45, 46, 47 and the ink application rollers 31, 32, 33, 51, 52, 53. And a control device 61 for moving the swimsuit rollers 34 and 54 and separating them from the adjacent rollers.

  In other words, the nip pressure automatic adjusting devices 37, 38, 57, 58, 82, 92 include the kneading rollers 25, 26, 27, 45, 46, 47 and the ink applying rollers 31, 32, 33, 51, 52, 53 and the swimsuits. The nip pressure between the rollers 34 and 54 and the respective rollers in contact with the rollers 34 and 54 is automatically adjusted.

  In this case, in FIG. 1, the front surface printing unit 21 has one nip pressure automatic adjusting device 37 for the three kneading rollers 25, 26, and 27, and one for the three ink forming rollers 31, 32, and 33. Although only one nip pressure automatic adjustment device 82 is shown for the nip pressure automatic adjustment device 38 and the swimsuit roller 34, all the kneading rollers 25, 26, 27, the ink application rollers 31, 32, 33, and the swimsuit roller A separate automatic nip pressure adjusting device is provided for 34. Similarly, in the back surface printing unit 41, one nip pressure automatic adjusting device 57 for the three kneading rollers 45, 46, 47, and one nip pressure for the three ink forming rollers 51, 52, 53. Although only one nip pressure automatic adjustment device 92 is shown for the automatic adjustment device 58 and the swimsuit roller 34, all the kneading rollers 45, 46, 47, the ink application rollers 51, 52, 53, and the swimsuit roller 54 are shown. On the other hand, a separate automatic nip pressure adjusting device is provided. Further, the control device 61 can drive and control all the automatic nip pressure adjusting devices 37, 38, 57, 58, 82 and 83.

  Here, the nip pressure automatic adjusting devices 37, 38, 57, 58, 82, and 92 will be described. The nip pressure automatic adjusting devices 37, 38, 57, 58, 82, and 92 have substantially the same configuration. Therefore, only the nip pressure automatic adjusting device 37 will be described. Further, the nip pressure automatic adjusting device 37 is provided at both axial end portions of the kneading roller 26 in the axial direction, and both have the same configuration, so only one of them will be described.

  In the nip pressure automatic adjusting device 37, as shown in FIGS. 2 and 3, a case 72 having a cylindrical shape is fixed to the frame 71. The case 72 has an outer cylinder 72a and an inner cylinder 72b. . Like the case 72, the support 73 has a cylindrical shape and is loosely fitted between the outer cylinder 72a and the inner cylinder 72b of the case 72. The end of the kneading roller 26 is connected to the support 73.

  The case 72 has a ring-shaped friction plate 74 fixed to the outer peripheral surface of the inner cylinder 72b, while the support 73 has a ring-shaped friction plate 75 fixed to the inner peripheral surface thereof. The plates 74 and 75 are arranged alternately. Further, the case 72 has a driving rod 76 that is supported inside the inner cylinder 72b so as to be movable in the axial direction, and a pressing portion 76a that presses and contacts the friction plates 74 and 75 is formed at one end. Yes. The drive rod 76 has a support plate 76b at the other end, and a compression spring 77 is interposed between the inner cylinder 72b of the case 72 and the support plate 76b.

  A pressure chamber 78 for pressing the support plate 76 b of the drive rod 76 is formed between the frame 71 and the case 72, and an air supply hole 71 a communicating with the pressure chamber 78 is formed in the frame 71. The air supply hole 71a is connected to an air supply device (not shown).

  Furthermore, in the space between the outer cylinder 72a of the case 72 and the support body 73, tubes 79 divided into four in the circumferential direction are interposed, and air is supplied to and discharged from each tube 79 individually. be able to.

  Therefore, in a state where air is not supplied to the pressure chamber 78, the drive rod 76 is urged and supported to the left in FIG. 2 by the urging force of the compression spring 77, and the pressing portion 76a is supported by the friction plates 74 and 75. By pressing and contacting, the support 73, that is, the kneading roller 26 can be fixed at this position with respect to the case 72 by the frictional force. On the other hand, when air is supplied to the pressure chamber 78 from the air supply hole 71a, the support plate 76b receives pressure and moves to the right in FIG. 2 against the urging force of the compression spring 77. Then, the pressing portion 76a releases the pressing of the friction plates 74 and 75 and separates them, so that the support 73, that is, the kneading roller 26 becomes free from the case 72. Here, by supplying and discharging air to / from one of the four tubes 79, each tube 79 expands and contracts to move the support 73, that is, the kneading roller 26, and the nip pressure with the adjacent roller is increased. Can be adjusted.

  In the printing unit 16 of this embodiment, the ink source rollers 23 and 43, the delivery rollers 24 and 44, the kneading rollers 25, 26, 27, 45, 46, 47, the reciprocating rollers 28, 29, 30, 48, 49, 50, ink deposition rollers 31, 32, 33, 51, 52, 53, swimsuit rollers 34, 54, plate cylinders 35, 55, and blanket cylinders 36, 56 are substantially rotatably supported in series, and are kneaded. The rollers 25, 26, 27, 45, 46, 47, the ink deposition rollers 31, 32, 33, 51, 52, 53 and the swim rollers 34, 54 are configured as rubber rollers, while the delivery rollers 24, 44 and the reciprocating rollers 28 are configured. , 29, 30, 48, 49, 50 and plate cylinders 36, 56 are configured as metal rollers.

  That is, a rubber roller and a metal roller are rotatably supported in contact with each other on an ink supply path for supplying ink from ink fountains 22 and 42 as supply sources to blanket cylinders 36 and 56 through plate cylinders 35 and 55. Has been. The rubber roller and the metal roller are in contact with each other on the dampening water supply path for supplying the dampening water from the spray dampeners 81 and 91 serving as the supply source to the blanket cylinders 36 and 56 through the plate cylinders 35 and 55. It is supported so that it can rotate freely. With this configuration, the control device 61 as the roller deformation amount measuring means adjusts the nip pressure between the rubber roller and the metal roller by the automatic nip pressure adjusting device 37, 38, 57, 58, 82, 92 during non-printing. At this time, the amount of deformation of the roller is measured based on the movement stop position of the rubber roller, and the replacement time of the rubber roller is determined. The control device 61 functions as a roller deformation amount measuring unit and a roller replacement time determining unit of the present invention.

  In this case, the control device 61 has moved the rubber roller to the standby position separated from the metal roller or the contact position in contact with the metal roller by the automatic nip pressure adjusting devices 37, 38, 57, 58, 82, 92. The amount of roller deformation is measured based on the current roller position information. In this embodiment, the nip pressure automatic adjusting devices 37, 38, 57, 58, 82, and 92 measure the amount of roller deformation based on the roller shaft center position when the rubber roller moves to the contact position.

  Further, the control device 61 measures the roller deformation amount based on the initial roller position information on the rubber roller and the roller position information after a predetermined period. In this case, the control device 61 measures the roller deformation amount based on the roller position information when the rubber roller moves to the optimum nip position by the automatic nip pressure adjusting devices 37, 38, 57, 58, 82, and 92. That is, the roller deformation amount is measured based on the initial optimum nip position of the rubber roller and the optimum nip position after a predetermined period.

  Here, the kneading rollers 25, 26, 27, 45, 46, 47 as rubber rollers using the automatic nip pressure adjusting devices 37, 38, 57, 58, 82, 92 by the control device 61 and the ink application rollers 31, 32, The roller deformation detection control of 33, 51, 52, 53 and the swimsuit rollers 34, 54 will be specifically described. Here, as described above, the roller deformation detection control in the kneading roller 26 will be described by moving the kneading roller 26 with respect to the reciprocating roller 29 by the automatic nip pressure adjusting device 37. Further, position sensors 102a and 102b, which will be described later, are attached to nip pressure automatic adjusting devices 37, 38, 57, 58, 82, and 92, and are denoted by reference numeral 102 in FIG.

  In the roller deformation detection device of the present embodiment, as shown in FIG. 4, the reciprocating roller 29 is supported by the frames 101a and 101b so that the left and right shaft ends are rotatable, while the kneading roller 26 is supported by the frames 101a and 101b. The nip pressure automatic adjusting devices 37a and 37b mounted on the nip are supported so as to be movable in the radial direction and supported so as to be rotatable. The automatic nip pressure adjusting devices 37a and 37b are equipped with position sensors 102a and 102b for detecting the movement amount of the axial position of the kneading roller 26, and the detection result is output to the control device 61. Further, a display (display device) 103 is connected to the control device 61 so that the roller deformation amount of the kneading roller 26 and the replacement time of the kneading roller 26 calculated by the control device 61 can be displayed.

  As shown in FIG. 5, when the kneading roller 26 is replaced with a new one that does not wear or shrink, the new kneading roller 26 has an outer peripheral surface of the reciprocating roller 29 by an automatic nip pressure adjusting device 37a, 37b. By pressing the outer peripheral surface, the nip pressure between the kneading roller 26 and the reciprocating roller 29 is adjusted to an optimum value. As shown in FIG. 2, the nip pressure automatic adjusting devices 37 a and 37 b are installed in any one of the tubes 79 in a state where the friction plates 74 and 75 are disengaged between the case 72 and the support 73. By supplying and discharging air and expanding and contracting, the kneading roller 26 can be moved via the support 73 and the nip pressure with the reciprocating roller 29 can be adjusted. In this case, a predetermined air pressure to be supplied to each tube 79 is set in advance so that an optimum nip pressure between the kneading roller 26 and the reciprocating roller 29 can be ensured, and this predetermined air pressure is supplied to the tube 79. By doing so, the nip pressure with the reciprocating roller 29 is automatically adjusted so as to be an optimum value.

Therefore, as shown in FIGS. 4 and 5, when the kneading roller 26 is used for a predetermined period and the outer diameter is reduced due to shrinkage or wear, a predetermined air pressure is adjusted by the nip pressure automatic adjusting devices 37a and 37b. When the kneading roller 26 having a small diameter is supplied to the tube 79, the nip pressure between the kneading roller 26 and the reciprocating roller 29 is adjusted to an optimum value by pressing the outer circumferential surface against the outer circumferential surface of the reciprocating roller 29. The At this time, since the outer diameter of the kneading roller 26 used for a predetermined period is small, the axial center position is different even if the contact position with the reciprocating roller 29 is the same. That is, when the kneading roller 26 is in a position in contact with the reciprocating roller 29 at the optimum nip pressure, the axis O ₃ of the used kneading roller 26 is in relation to the axis O ₂ of the new kneading roller 26. It moves to the axis O ₁ side of the reciprocating roller 29. Therefore, the distance between the new grinding roller 25 axial center O ₂ and the used grinding roller 26 axial center O ₃ is the deformation amount S of the grinding roller 26.

  Here, the roller deformation detection control of the kneading roller 26 by the nip pressure automatic adjusting devices 37a and 37b will be specifically described.

  First, when the kneading roller 26 is replaced with a new one, the nip pressure between the reciprocating roller 29 is adjusted to an optimum value by the automatic nip pressure adjusting devices 37a and 37b, and the amount of movement at this time is measured. Keep it. That is, as shown in FIGS. 4 and 7-1, a predetermined air pressure is supplied to the automatic nip pressure adjusting devices 37a and 37b from the state where the kneading roller 26 is in the standby position indicated by a two-dot chain line in FIG. As a result, the kneading roller 26 is moved to the reciprocating roller 29 side. Then, the kneading roller 26 moves to a contact position where the outer circumferential surface contacts the outer circumferential surface of the reciprocating roller 29 with a predetermined pressure, as indicated by a solid line in FIG. Is adjusted to an optimum value.

Position sensors 102a, 102b, when the output to the movement amount _{S 1} the control device 61 detects and the axis _{O 2} of the kneading roller 26 at this time, the control unit 61, the movement of the axis _{O 2} of the kneading roller 26 storing amount _{S 1.} Thereafter, when printing is performed for a predetermined period, the kneading roller 26 contracts or wears to reduce the outer diameter. When the printing operation is stopped by the plate replacement operation or the like, the roller deformation detection control is performed and the roller replacement determination control is performed.

As shown in FIG. 6, in step S11, the control device 61 determines whether or not the nip pressure adjustment between the kneading roller 25 and the reciprocating roller 29 is completed, and determines that the nip pressure adjustment is not completed. When you are done, exit this routine without doing anything. On the other hand, if it is determined that the nip pressure adjustment has been completed, the position sensors 102a and 102b detect the amount of movement of the kneading roller 26 during the nip pressure adjustment and output it to the control device 61 in step S12. That is, first, as shown in FIGS. 4 and 7-2, by supplying a predetermined air pressure to the nip pressure automatic adjusting devices 37a and 37b, the kneading roller 26 at the position of contact with the reciprocating roller 29, It moves to a predetermined standby position that is separated from the reciprocating roller 29. Subsequently, as shown in FIG. 4 and FIG. 7C, by supplying a predetermined air pressure to the automatic nip pressure adjusting devices 37a and 37b, the kneading roller 26 in the standby position is brought into contact with the reciprocating roller 29. Move to. The position sensor 102a, 102b outputs to the control unit 61 detects the movement amount _{S 2} of the axis _{O 2} of the kneading roller 26 at this time.

Returning to FIG. 6, at step S13, the control device 61, the initial displacement amount S ₁ of kneading roller 26 that stores, based on the movement amount S ₂ of spent kneading roller 26, specifically, storage to the initial displacement amount S ₁ of kneading roller 26. by subtracting the shift amount S ₂ of spent kneading roller 26, and calculates the roller deformation amount S. In step S14, it is determined whether the calculated roller deformation amount S is within a preset allowable range. Here, if it is determined that the roller deformation amount S is not within the allowable range, a warning message for prompting replacement of the kneading roller 26 is displayed on the display 73 in step S15.

Then, in step S16, the operator performs roller replacement of the kneading roller 26. In step S17, as described above, the nip pressure between the reciprocating roller 29 is adjusted to the optimum value by the automatic nip pressure adjusting devices 37a and 37b. At this time, the position sensors 102a and 102b measure. The movement amount S ₁ of the axis O ₂ in the kneading roller 26 is stored.

  On the other hand, if it is determined in step S14 that the roller deformation amount S is within the allowable range, it is determined in step S18 how much the roller deformation amount S of the kneading roller 26 is. Specifically, the roller deformation amount S of the kneading roller 26 is determined by comparing it with a predetermined value set in advance. In this case, the predetermined value is assumed to be smaller than the allowable range. Here, if it is determined that the roller deformation amount S of the kneading roller 26 is large, a cautionary note that the time for replacing the kneading roller 26 is near is displayed on the display 103 in step S19. If it is determined that the roller deformation amount S of the kneading roller 26 is small, this routine is exited without doing anything.

  Therefore, when the printing machine is stopped due to the plate replacement work or the like, the roller replacement time is determined by detecting the roller deformation amount S of the kneading roller 26 simultaneously with the nip pressure adjustment work, and without using a special device. The life of the kneading roller 26 can be estimated.

  As described above, in the roller deformation detection apparatus and method according to the present embodiment, the ink is supplied on the ink supply path from the ink fountains 22 and 42 as the supply source to the plate cylinders 35 and 55, and the fountain solution is added to the ink supply path. A rubber roller and a metal roller are rotatably supported in a contact state on a dampening water supply path for supplying from the spray dampeners 81 and 91 as supply sources to the plate cylinders 35 and 55, and the rubber roller and the metal roller are in contact with each other. A nip pressure automatic adjusting device 37, 38, 57, 58, 82, 92 capable of changing the state is provided, and the control device 61 places the rubber roller in a standby position by the nip pressure automatic adjusting device 37, 38, 57, 58, 82, 92. The amount of deformation of the roller is measured based on the roller position information when moving to the position.

  Therefore, by measuring the amount of roller deformation when the rubber roller is moved to the standby position, it is possible to properly grasp the replacement time of the rubber roller, and as a result, by replacing the rubber roller at the appropriate time, the print quality can be improved. While a fall can be suppressed, an increase in product cost can be suppressed.

  Further, in the roller deformation detection device and method of this embodiment, the control device 61 measures the roller deformation amount based on the initial roller position information on the rubber roller and the roller position information after the lapse of a predetermined period. With the configuration, the deformation amount of the roller can be easily detected.

  Further, in the roller deformation detection device and method of this embodiment, the control device 61 uses the nip pressure automatic adjustment devices 37, 38, 57, 58, 82 and 92 to detect the roller position when the rubber roller is moved to the optimum nip position. The amount of roller deformation is measured based on the above. Therefore, when adjusting the nip pressure between the rollers in contact with each other, it is possible to measure the amount of roller deformation in the rubber roller, and to simplify the operation of detecting the amount of roller deformation.

  Further, in the roller deformation detection device and method of this embodiment, the control device 61 measures the amount of roller deformation based on the initial optimum nip position in the rubber roller and the optimum nip position after the lapse of a predetermined period. The amount of deformation can be detected with high accuracy. In this case, the roller deformation amount is measured based on the roller shaft center position when the rubber roller is moved to the contact position, the rubber roller movement position can be easily detected, and the measurement work for the roller deformation amount is simplified. Can be

  In the roller deformation detecting device and method of this embodiment, the ink source rollers 23 and 43, the delivery rollers 24 and 44, the kneading rollers 25, 26, 27, 45, 46 and 47, the reciprocating rollers 28, 29, 30 and the like. 48, 49, 50, ink deposition rollers 31, 32, 33, 51, 52, 53, bathing rollers 34, 54, plate cylinders 35, 55, and blanket cylinders 36, 56 are substantially rotatably supported in series. The kneading rollers 25, 26, 27, 45, 46, 47, the ink applying rollers 31, 32, 33, 51, 52, 53 and the swim rollers 34, 54 are configured as rubber rollers, while the delivery rollers 24, 44 The reciprocating rollers 28, 29, 30, 48, 49, 50 and the plate cylinders 36, 56 are configured as metal rollers. Then, the control device 61 uses the nip pressure automatic adjustment devices 37, 38, 57, 58, 82, 92 during non-printing, and the kneading rollers 25, 26, 27, 45, 46, 47 and the ink application rollers 31, 32, When adjusting the nip pressure between the rollers 33, 51, 52, 53 and the swim rollers 34, 54 and the adjacent rollers, the kneading rollers 25, 26, 27, 45, 46, 47 and the ink rollers 31, 32, 33, 51 are used. , 52, 53 and the swim stop rollers 34, 54 are measured based on their movement stop positions to determine the replacement timing of the rubber roller.

  Therefore, when printing is not performed, the amount of deformation of the rollers in the kneading rollers 25, 26, 27, 45, 46, 47, the ink applying rollers 31, 32, 33, 51, 52, 53 and the swim applying rollers 34, 54 The replacement time can be easily determined.

  In the above-described roller deformation detection apparatus and method according to the embodiment, the roller deformation amount is measured based on the roller shaft center position when the rubber roller is moved to the contact position. However, the present invention is limited to this configuration. It is not a thing. For example, the roller deformation amount may be measured based on the roller outer peripheral position when the rubber roller is moved to the standby position. Specifically, the new rubber roller is moved to the standby position, the outer peripheral position of the rubber roller at this time is detected by the position sensor, and this is stored as an initial value. Then, the rubber roller that has been used for a predetermined period is moved to the standby position, the outer peripheral position of the rubber roller at this time is detected by the position sensor, the outer peripheral position of the new rubber roller that is stored as the initial value, and the outer peripheral position of the rubber roller that has been used for the predetermined period The roller deformation amount can be measured by comparing. Thus, by measuring the roller deformation amount based on the roller outer peripheral position when the rubber roller is moved to the standby position, the metal roller does not get in the way and the roller deformation amount of the rubber roller can be easily measured. .

  In the above-described embodiment, the roller deformation amount of the rubber roller is measured simultaneously with the nip pressure adjustment work when the plate is replaced. However, the present invention is not limited to the nip pressure adjustment work, and the printing machine maintenance can be performed during printing. This may be performed when the printing machine is stopped, such as when the printing is finished or when the paper is cut.

  Further, in the above-described embodiment, a gap transfer system (continuous ink supply system) in which a predetermined gap is provided between the ink source roller and the delivery roller so that the ink of the ink source roller is delivered to the recess of the delivery roller. And a call transfer method (intermittent ink supply method) in which a call roller that reciprocates between the ink source roller and the reciprocating roller is provided to deliver ink from the ink source roller to the reciprocating roller via the call roller. There is. In this embodiment, the gap transfer method (continuous ink supply method) is used, but the call transfer method (intermittent ink supply method) may be used. That is, in the above-described embodiment, the ink supply device is configured by the ink fountains 22 and 42 and the ink source rollers 23 and 43. However, the present invention is not limited to this configuration, and the ink source is replaced with the delivery rollers 24 and 44. Calling rollers that reciprocate between the rollers 23 and 43 and the kneading rollers 25 and 45 may be used. Further, it may be a jet type ink supply pump.

  In the above-described embodiment, the nip pressure automatic adjusting devices 37, 38, 57, and 58 are configured by supplying and discharging air to and from the plurality of tubes 79, and the fixing device is configured by the plurality of friction plates 74 and 75. Although configured, the present invention is not limited to this configuration.

  Moreover, although the roller deformation | transformation detection apparatus and method of this invention were demonstrated and applied to the newspaper offset rotary printing press in the Example mentioned above, it can also be applied to other printing presses, such as a commercial printing press. Also, a sheet-fed printing machine may be used, and a double-sided printing machine is used, but a single-sided printing machine may be used.

  In the above-described embodiment, the description has been made by applying the printing unit 16 having the dampening device including the spray dampeners 81 and 91, the reciprocating rollers 30 and 50, the kneading rollers 27 and 47, and the swimsuit rollers 34 and 54. However, the present invention is not limited to this configuration, and may be applied to a printing unit that does not have a dampening device such as waterless printing. Furthermore, the newspaper rotary offset printing press has been described as an example. However, any printing press having a configuration in which a rubber roller and a metal roller are rotatably supported in contact with each other may be used. It may be.

  The roller deformation detection apparatus and method according to the present invention appropriately grasps the replacement time of the rubber roller by measuring the roller deformation amount based on the roller position information when the rubber roller is moved to the standby position or the contact position. It is possible to suppress a decrease in print quality and can be applied to any printing machine.

1 is a schematic configuration diagram of a printing unit in a newspaper offset rotary printing press according to an embodiment of the present invention. It is sectional drawing of a nip pressure automatic adjustment apparatus. FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is a schematic block diagram showing the roller deformation | transformation detection apparatus of a present Example. It is the schematic showing the roller deformation | transformation detection method of a present Example. It is a flowchart showing the roller deformation | transformation detection method of a present Example. It is explanatory drawing showing the detection procedure by the roller deformation | transformation detection apparatus of a present Example. It is explanatory drawing showing the detection procedure by the roller deformation | transformation detection apparatus of a present Example. It is explanatory drawing showing the detection procedure by the roller deformation | transformation detection apparatus of a present Example. It is the schematic showing the web offset press for newspapers of a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Paper feeder 12 Printing apparatus 13 Turn bar apparatus 14 Folding machine 21 Surface printing unit 22, 42 Ink fountain (ink supply apparatus)
23, 43 Ink base roller 24, 44 Delivery roller (metal roller)
25, 26, 27, 45, 46, 47 Kneading rollers (rubber rollers)
28, 29, 30, 48, 49, 50 Reciprocating roller (metal roller)
31, 32, 33, 51, 52, 53 Inking roller (rubber roller)
34,54 Swimsuit roller (rubber roller)
35,55 plate cylinder (metal roller)
36, 56 Blanket cylinder 37, 38, 57, 58, 82, 92 Automatic nip pressure adjusting device (roller moving means)
41 Back side printing unit 61 Control device (roller deformation measuring means, roller replacement time judging means)
81, 82 Spray dampener 102a, 102b Position sensor W Web

Claims (10)

In a printing machine in which a rubber roller and a metal roller are rotatably supported in a contact state,
Roller moving means movable between a standby position set in advance for the rubber roller and a contact position for contacting the metal roller;
Roller deformation amount measuring means for measuring a roller deformation amount based on roller position information when the rubber roller is moved to a standby position or a contact position by the roller moving means;
A roller deformation detection device comprising:   The roller deformation detection device according to claim 1, wherein the roller deformation amount measuring unit measures a roller deformation amount based on initial roller position information on the rubber roller and roller position information after a predetermined period has elapsed.   The roller moving means is a nip pressure automatic adjusting device that automatically adjusts the nip pressure between the rollers in contact with each other, and the roller deformation amount measuring means moves the rubber roller to an optimum nip position by the nip pressure automatic adjusting device. The roller deformation detection device according to claim 1, wherein the roller deformation amount is measured based on the roller position information at the time.   4. The roller deformation detection device according to claim 3, wherein the roller deformation amount measuring means measures a roller deformation amount based on an initial optimum nip position in the rubber roller and an optimum nip position after a predetermined period.   5. The roller deformation amount measuring unit measures a roller deformation amount based on a roller axial center position when the roller moving unit moves the rubber roller to a contact position. The roller deformation | transformation detection apparatus as described in one.   5. The roller deformation amount measuring unit measures a roller deformation amount based on a roller outer peripheral position when the rubber moving unit moves the rubber roller to a standby position by the roller moving unit. The roller deformation | transformation detection apparatus of description.   5. The roller deformation according to claim 1, further comprising: a roller replacement time determination unit that determines a replacement time of the rubber roller based on a roller deformation amount measured by the roller deformation amount measurement unit. Detection device. In a printing machine in which a rubber roller and a metal roller are rotatably supported in a contact state,
Measuring a roller deformation amount based on roller position information when the rubber roller moves between a standby position set in advance and a contact position where the rubber roller contacts the metal roller;
A roller deformation detection method characterized by the above.   The roller deformation detection method according to claim 8, wherein the roller deformation amount is measured based on initial roller position information on the rubber roller and roller position information after a predetermined period has elapsed.   The roller deformation detection method according to claim 9, wherein the roller deformation amount is measured based on an initial optimum nip position in the rubber roller and an optimum nip position after a predetermined period.

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