JP2019034429A - Plate fastening system, method and printer - Google Patents

Abstract

To improve workability, to simplify a device, and to reduce manufacturing cost for a plate fastening system, a method and a printer.SOLUTION: A plate fastening system comprises: a plate fastening device for fastening a printing plate 71 by locking of a locking claw on a biting hip side end 71b of the printing plate 71 wound on an outer peripheral surface of a plate cylinder 41a; a locking claw actuation cylinder for engaging and disengaging the locking claw to/from the biting hip side end 71b of the printing plate 71; and a clamp switch 242 for locking the locking claw on the biting hip side end 71b of the printing plate 71 by actuating the locking claw operation cylinder. The clamp switch 242 is positioned in an area that can be accessed by fingers of an operator while holding the biting hip side end 71b of the printing plate 71 with a hand of the operator.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a plate clamping system and method used for mounting a printing plate on a plate cylinder supported by the printing press, and a printing press including the plate clamping system.

  For example, an offset rotary printing press for newspapers includes a paper feeding device, a printing device, a web pass device, and a folding machine. The printing apparatus includes a plurality of printing units, and each printing unit performs printing on a corresponding web. The printing unit includes an ink supply source, an ink supply device that supplies ink using a plurality of rollers, a plate cylinder on which a printing plate is mounted, and a flanket cylinder that transfers ink (image) to printing paper. I have.

  In this printing unit, a plurality of printing plates are produced according to the printed matter, and printing is carried out by attaching printing plates necessary for printing to the plate cylinder. For this reason, the printing unit is equipped with a plate clamping device for winding the printing plate around the outer peripheral surface of the plate cylinder and fixing both ends thereof. The plate cylinder is provided with a gap portion having a groove shape along the axial direction on the outer peripheral surface, and the plate clamping device is configured by providing a tension bar in the gap portion, and the tension bar provides a rear end of the printing plate. By pulling the part and applying tension to the printing plate, the printing plate is fastened to the plate cylinder and fixed.

  When mounting a printing plate on the plate cylinder, the edge of the printing plate on the side of the plate is locked to the holding portion of the plate cylinder, the printing plate is rotated, the printing plate is wound around the plate cylinder, and printed by the plate clamping device. Lock the tail edge side of the plate to the tail edge of the plate cylinder. At this time, one worker presses the outer peripheral surface of the tail edge side end portion of the printing plate, and the other worker operates the operation switch of the plate clamping device. Then, when the tension bar rotates and the locking claw moves to the release position, the tail edge side end of the printing plate that has been pressed by the operator is pushed into the gap, and the tension bar rotates in the reverse direction. When the locking claw moves to the locking position, the tail edge side end is locked by the locking claw, and the printing plate is fastened to the plate cylinder by the tension bar and fixed.

  In this case, when performing the work of mounting the printing plate on the plate cylinder, two workers are required, and in the situation where the number of personnel with equipment is limited, it is difficult to perform the rapid plate replacement work. It was coming. Therefore, a technique for automatically performing plate replacement work has been proposed. For example, there is one described in Patent Document 1 below.

JP 2008-55794 A

  In the semi-automatic plate change apparatus described in Patent Document 1 described above, the plate pressing roller is in a state of being pressed to press the printing plate against the plate cylinder, and the plate pressing roller automatically pushes the end edge side of the printing plate into the gap portion. In this case, the tension bar is rotated and locked by a locking claw. In this semi-automatic plate changer, the operator only needs to input an operation command to the controller, and one worker can perform the plate change work. However, a plurality of plate pressing rollers, their driving devices, various sensors, and the like are required at the periphery of the plate cylinder, which causes a problem that the structure becomes complicated and the manufacturing cost increases.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems, and to provide a plate clamping system and method, and a printing machine that improve workability and simplify the apparatus and reduce manufacturing costs.

  A plate clamping system according to the present invention for achieving the above-described object includes a plate clamping device in which a locking claw is engaged with an end portion of a printing plate wound around an outer peripheral surface of a plate cylinder to fasten the printing plate. A locking claw actuating device that engages and disengages the locking claw with respect to the end portion of the printing plate, and the locking claw actuating device engages the locking claw with the end portion of the printing plate. In the plate clamping system comprising a clamp switch, the clamp switch is arranged in an area where the operator's finger can reach while the operator's hand is pressing the end of the plate. It is.

  Therefore, when mounting the printing plate on the plate cylinder, the operator locks one end of the printing plate on the plate cylinder, winds the printing plate around the outer peripheral surface of the printing plate, and then manually connects the other end of the printing plate. When the clamp switch is operated with a finger while the part is pressed, the plate clamping device is operated by the locking claw actuating device, and the locking claw is locked to the other end of the printing plate. As a result, it is possible for a single worker to perform the operation of mounting the printing plate on the plate cylinder, and the workability can be improved by performing a quick plate replacement operation. Further, it is only necessary to provide a clamp switch in addition to the existing plate clamping device and the latching claw actuating device, so that a large-scale device is unnecessary and the device can be simplified and the manufacturing cost can be reduced.

  In the plate clamping system of the present invention, the clamp switch is arranged at a central position in the width direction of the printing plate mounted on the plate cylinder.

  Therefore, the clamp switch is arranged at the center position in the width direction of the plate so that when the operator presses the plate with the left hand and the right hand, the clamp switch can be easily operated with the thumb of the left hand or the thumb of the right hand. Can do.

  In the plate clamping system according to the present invention, the clamp switch is arranged within 50 mm from a central position in the width direction of the printing plate mounted on the plate cylinder toward one or the other in the width direction. .

  Accordingly, the clamp switch is arranged within 50 mm on the left and right from the center position in the width direction of the printing plate, so that when the operator presses the printing plate with the left hand and the right hand, the clamp switch is held with the left thumb or the right thumb. Easy to operate.

  In the plate clamping system according to the present invention, the clamp switch is disposed so as to be positionally adjustable in an axial direction of the plate cylinder.

  Therefore, the clamp switch can be easily operated with the thumb of the dominant hand by adjusting the position of the clamp switch to the left or right according to the dominant hand of the operator.

  In the plate clamping system of the present invention, the shortest distance between the clamp switch and the outer peripheral surface of the plate cylinder is set to 100 mm or less.

  Therefore, by setting the shortest distance between the clamp switch and the outer peripheral surface of the plate cylinder to 100 mm or less, the clamp switch can be arranged in the vicinity of the outer peripheral surface of the plate cylinder to improve the operability of the clamp switch by the operator. it can.

  In the plate clamping system according to the present invention, when the rotational position of the plate cylinder stops at the plate clamping position, the operator's hand holds the end of the plate and the operator's finger reaches the region where the finger reaches. A clamp switch is arranged.

  Therefore, after winding the printing plate having one end locked to the plate cylinder around the outer peripheral surface of the plate cylinder, when the other end of the printing plate is locked to the plate cylinder, the plate cylinder is rotated to rotate the plate clamping position. To stop. At this time, by placing the clamp switch in the area where the finger can reach while the operator's hand is pressing the end of the plate, one worker can perform the work of mounting the plate on the plate cylinder. The workability can be improved.

  In the plate clamping system of the present invention, the shortest distance between the clamp switch and the gap portion of the plate cylinder is set to 140 mm or less.

  Therefore, by setting the shortest distance between the clamp switch and the gap portion of the plate cylinder to 140 mm or less, the operator can operate the clamp switch while properly pressing the other end of the printing plate with the left hand and the right hand.

  In the plate clamping system of the present invention, the shortest distance between the clamp switch and the axial end portion of the gap portion of the plate cylinder corresponding to the plate mounting region is set to 300 mm or less.

  Accordingly, by setting the shortest distance between the end portion in the axial direction of the gap portion of the plate cylinder corresponding to the clamping switch and the plate mounting area to 300 mm or less, the operator can adjust the width at the other end portion of the printing plate with the left hand and the right hand. The clamp switch can be operated while pressing the entire direction.

  In the plate clamping system of the present invention, the clamp switch is disposed on one side in the circumferential direction of the plate cylinder or on the other side in the circumferential direction with respect to the gap portion of the plate cylinder stopped at the plate clamping position. It is characterized by.

  Therefore, by disposing the clamp switch on one side or the other side in the circumferential direction of the plate cylinder with respect to the gap portion of the plate cylinder, the operator holds the other end of the printing plate with the left hand and the right hand while holding the finger on the plate cylinder. The clamp switch can be easily operated simply by shifting in the circumferential direction.

  In the plate clamping system according to the present invention, an attachment member is disposed along an axial direction of the plate cylinder adjacent to a contact position of the plate cylinder and the blanket cylinder, and the clamp switch is provided on the attachment member. It is said.

  Therefore, the clamp switch can be disposed without contacting the plate cylinder or the blanket cylinder by providing the clamp switch on the mounting member disposed adjacent to the contact position between the plate cylinder and the blanket cylinder.

  In the plate clamping system according to the present invention, a safety bar is disposed along the axial direction of the plate cylinder adjacent to the contact position of the plate cylinder and the blanket cylinder, and the clamp switch is provided on the safety bar. It is said.

  Therefore, by providing the clamp switch on the safety bar disposed adjacent to the position where the plate cylinder and the blanket cylinder are in contact with each other, it is possible to simplify the structure without requiring a separate clamp switch mounting member.

  In the plate clamping system of the present invention, the plate cylinder can be mounted with a plurality of the printing plates along the axial direction, and the plate clamping device includes a plurality of the locking claws that individually restrain the plurality of the printing plates. The latching claw actuating device has a plurality of actuating members that individually actuate the plurality of latching claws, and a plurality of the clamp switches are provided corresponding to the plurality of actuating members. It is a feature.

  Accordingly, by providing a plurality of clamp switches corresponding to a plurality of printing plates mounted on the plate cylinder, a plurality of printing plates can be mounted on the plate cylinder efficiently.

  In the plate clamping system of the present invention, the clamp switch is provided on a clamp operation panel fixed at a predetermined position.

  Therefore, when there are a plurality of clamp switches, a plurality of clamp switches may be provided on the clamp operation panel, and the clamp switches can be easily attached.

  In the plate clamping system of the present invention, the clamp operation panel includes a clamp position lamp that is lit when the plate cylinder is stopped at the plate clamping position, and a plate latch that is lit when the plate cylinder is stopped at the plate hanging position. A position lamp and a surface selection lamp for displaying a surface position of the plate cylinder on which the printing plate is mounted are provided.

  Therefore, by providing a clamp position lamp, plate-hanging position lamp, and surface selection lamp, the operator can visually check the state of the plate cylinder and the plate during the plate removal work and the plate mounting work. Can be improved.

  In the plate clamping system of the present invention, a main operation panel is provided that includes an engagement / disengagement switch that operates the locking claw actuating device, a forward rotation switch that rotates the plate cylinder forward, and a reverse rotation switch that reverses the plate cylinder. It is characterized by being able to.

  Therefore, by providing the main operation panel including the engagement / disengagement switch, the forward rotation switch, and the reverse rotation switch separately from the clamp switch, it is only necessary to provide the clamp switch at a predetermined position, and the structure can be simplified. At the same time, an engagement / disengagement switch having the same function as the clamp switch is provided on the main operation panel, so that the plate mounting operation can be performed even when the clamp switch is out of order.

  The plate clamping system of the present invention is characterized in that a control device is provided for operating the locking claw operating device after a predetermined time elapses when an operation command signal by operating the clamp switch is input.

  Therefore, when the operation command signal is input, the control device operates the latching claw operation device after a lapse of a predetermined time, so that a waiting time of a predetermined time is ensured from the input of the operation command signal. During the waiting time, the end portion of the printing plate wound around the outer peripheral surface of the plate cylinder can be pressed from the outside. As a result, it is possible for a single worker to perform the operation of mounting the printing plate on the plate cylinder, and the workability can be improved by performing a quick plate replacement operation.

  Further, the plate clamping method of the present invention includes a plate clamping device for locking the plate by locking an engagement claw with an end of the printing plate wound around the outer peripheral surface of the plate cylinder, and an end of the plate A locking claw actuating device that engages and disengages the locking claw, and a clamp switch that locks the locking claw on the end of the printing plate by operating the locking claw actuation device. In the plate clamping system, when one end is locked to the plate cylinder and the other end of the printing plate wound around the outer peripheral surface of the plate cylinder is locked to the plate cylinder, the left and right hands of the operator The clamp switch is operated by a finger of a left hand or a right hand of the operator while the other end portion of the printing plate is pushed into a gap portion of the plate cylinder.

  Accordingly, it is possible to perform the work of mounting the printing plate on the plate cylinder by one operator, and the workability can be improved by performing the quick plate replacement work. Further, it is only necessary to provide a clamp switch in addition to the existing plate clamping device and the latching claw actuating device, so that a large-scale device is unnecessary and the device can be simplified and the manufacturing cost can be reduced.

  The printing machine of the present invention includes an ink supply device that supplies ink, a plate cylinder that supplies ink to a printing plate mounted on an outer peripheral portion from the ink supply device, and an image of ink received from the plate cylinder. A blanket cylinder for transferring the image to the web, and the plate clamping system.

  Therefore, when mounting the printing plate on the plate cylinder, the operator locks one end of the printing plate on the plate cylinder, winds the printing plate around the outer periphery of the plate cylinder, and then manually touches the end of the printing plate. With the finger pressed, the clamp switch is operated with a finger to operate the plate clamping device by the locking claw operating device to lock the locking claw to the other end of the printing plate. As a result, it is possible for a single worker to perform the operation of mounting the printing plate on the plate cylinder, and the workability can be improved by performing a quick plate replacement operation. Further, it is only necessary to provide a clamp switch in addition to the existing plate clamping device and the latching claw actuating device, so that a large-scale device is unnecessary and the device can be simplified and the manufacturing cost can be reduced.

  According to the plate clamping system and method and the printing machine of the present invention, it is possible to improve workability by carrying out a quick plate change operation, and it is possible to simplify the apparatus and reduce the manufacturing cost without requiring a large-scale apparatus. Reduction can be achieved.

FIG. 1 is a block configuration diagram showing a plate clamping system of the present embodiment. FIG. 2 is a schematic front view showing a printing unit to which the plate clamping system is applied. FIG. 3 is a schematic plan view showing the printing unit. FIG. 4 is a schematic diagram illustrating an arrangement configuration of the clamp operation panel in the printing unit. FIG. 5 is a schematic diagram showing a modification of the arrangement configuration of the clamp operation panel in the printing unit. FIG. 6 is a front view of the main operation panel. FIG. 7 is a front view of the clamp operation panel. FIG. 8 is a side view for explaining the arrangement of the clamp operation panels in the first stack. FIG. 9 is a front view for explaining the arrangement of the clamp operation panels in the first stack. FIG. 10 is a side view for explaining the arrangement of the clamp operation panels in the second stack. FIG. 11 is a front view for explaining the arrangement of the clamp operation panels in the second stack. FIG. 12 is a flowchart showing the plate removing operation by the plate clamping system. FIG. 13 is a flowchart showing plate mounting work by the plate clamping system. FIG. 14A is a schematic diagram illustrating the phase alignment operation of the gap portion of the plate cylinder. FIG. 14-2 is a schematic diagram illustrating a plate-hanging operation on the plate cylinder. FIG. 14C is a schematic diagram illustrating a plate winding operation around the plate cylinder. FIG. 14-4 is a schematic diagram illustrating a plate fastening operation to the plate cylinder. FIG. 15 is a schematic configuration diagram illustrating a newspaper offset rotary printing press. FIG. 16 is a schematic configuration diagram illustrating a printing unit in a newspaper offset rotary printing press. FIG. 17 is a schematic diagram illustrating a plate clamping device. FIG. 18 is a schematic diagram illustrating a plate clamping operation by the plate clamping apparatus. FIG. 19 is a schematic diagram illustrating a plate clamping operation by the plate clamping apparatus.

  Exemplary embodiments of a plate clamping system and method and a printing press according to the present invention will be explained below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment, Moreover, when there exist several embodiment, what comprises combining each embodiment is also included.

  FIG. 15 is a schematic configuration diagram illustrating a newspaper offset rotary printing press, and FIG. 16 is a schematic configuration diagram illustrating a printing unit in the newspaper offset rotary printing press.

  In this embodiment, as shown in FIG. 15, the printing press P includes a paper feeding device R, an infeed device I, a printing device U, a web pass device D, and a folding machine F. The paper feeding device R has a plurality (seven in this embodiment) of paper feeding units R1 to R7, and the infeed device I has a plurality (seven in this embodiment) of infeed units I1 to I7. The printing apparatus U has a plurality (6 in this embodiment) of printing units U1 to U6, and the web pass apparatus D has a plurality of (2 in the present embodiment) web pass units D1. , D2 and the folding machine F has a plurality of (two in this embodiment) folding units F1, F2.

  In this case, the printing units U1 to U6 are described as six units. However, each of the printing units U1 to U6 can perform four-color printing, and can be divided vertically into twelve two-color printing units U11 and U12. , U21... U61, U62. In addition, although the two folding units F1 and F2 are described above and below, actually, there are an operation side folding unit F1 and a driving side folding unit F2 that are arranged side by side in a direction orthogonal to the paper surface. Furthermore, although the printing apparatus U has been described from two parts, it has been described by dividing it into two in terms of function, and in reality, it is a single apparatus.

  In the paper feeding device R, the paper feeding units R1 to R7 have substantially the same configuration, and have a holding arm for holding three webs on which a web (print medium) W is wound in a roll shape. By rotating, the web can be rotated to the paper feeding position. Each of the paper feeding units R1 to R7 is provided with a paper splicing device (not shown), and when the remaining web fed out at the paper feeding position becomes small, the paper splicing device causes the paper web at the paper feeding position to be fed. Thus, the web at the standby position can be spliced.

  In the infeed apparatus I, the infeed units I1 to I7 have substantially the same configuration, and the web traveling through the printing apparatus U is adjusted by adjusting the tension of the web W fed to the printing units U1 to U6 of the printing apparatus U. The tension of W is stably maintained at an appropriate value. For example, each of the infeed units I1 to I7 includes an infeed roller, a paper pressing rubber roller, a dancer roller, a guide roller, and the like. Then, the tension of the web W is made appropriate by urging the dancer roller in the tensioning direction of the web W, the peripheral speed of the infeed roller is changed according to the swing of the dancer roller, and the proper tension of the web W is maintained. ing.

  In the printing apparatus U, the printing units U1 to U6 are multicolor printing units capable of performing double-sided four-color printing. However, each printing unit U1-U6 can be made into the printing units U11-U62 which can perform double-sided two-color printing by dividing | segmenting up and down. Each of the printing units U11 to U62 has substantially the same configuration and has an ink supply device, a plate cylinder, a blanket cylinder, and the like, which will be described later.

  In the web pass apparatus D, the web pass unit D1 is provided for the printing units U1 to U3, and the web pass unit D2 is provided for the printing units U4 to U6. Each of the web path units D1 and D2 has substantially the same configuration, and is a slitter that cuts the web W along the longitudinal direction (the longitudinal direction of the web W, the conveyance direction of the web W) at the center in the width direction, and the longitudinal cut. A turn bar for setting the transport path of the web W, and a compensator for adjusting the transport position of the web W in the vertical direction.

  That is, the webs W printed by the printing units U1 to U3 are vertically cut by the slitter in the web pass unit D1, changed by the turn bar, changed by the turn bar, and adjusted by the compensator. Are overlaid in order. Each of the webs W printed by the printing units U4 to U6 is vertically cut by a slitter in the web pass unit D2, is changed by a turn bar, a transfer path is changed, and a transfer position is adjusted by a compensator. They are stacked in order.

  In the folding machine F, the two folding units F1 and F2 are arranged on the operation side and the drive side. That is, when a plurality of webs W1 are overlapped and introduced from the web pass unit D1, the folding unit F1 vertically folds the web W1, cuts it horizontally by a predetermined length, and folds it to form a fold. The paper can be discharged as a newspaper. In addition, when a plurality of webs W2 are overlapped and introduced from the web pass unit D2, the folding unit F2 vertically folds the web W2, cuts the web W2 by a predetermined length, and then horizontally folds to form a fold. The paper can be discharged as a newspaper.

  Here, the printing unit U1 in the printing apparatus U will be described in detail. The other printing units U2 to U6 have substantially the same configuration.

  As shown in FIG. 16, the printing unit U1 is an H-type tower unit so that four-color printing is possible. In the printing unit U1, the conveyance direction of the web W is upward in the vertical direction. From the bottom to the top, 4 for each of black, cyan, magenta, and yellow. Two stacks 21, 22, 23, and 24 are arranged. Each of the stacks 21, 22, 23, and 24 has a roller arrangement that is bilaterally symmetrical.

  Each stack 21, 22, 23, 24 can be opposed to the blanket cylinders 31 a, 31 b, 32 a, 32 b, 33 a, 33 b, 34 a, 34 b across the conveyance path of the web W. Plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are in contact with the cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b. The stacks 21, 22, 23, and 24 are respectively connected to the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, and 44b with ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a and 54b are provided. Further, dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b are provided for the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b.

  In this case, in the first stack 21 and the third stack 23, the blanket cylinders 31a, 31b, 33a, and 33b and the plate cylinders 41a, 41b, 43a, and 43b are arranged in a square shape, and the second stack 22 and the fourth stack are arranged. 24, blanket cylinders 32a, 32b, 34a, 34b and plate cylinders 42a, 42b, 44a, 44b are arranged in an inverted C shape. In each plate cylinder 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, a printing plate (not shown) that prints a different pattern on the outer peripheral surface is along the axial direction, that is, the width direction of the web W. Can be installed side by side. Further, the left side is a front surface printing unit that performs front surface printing and the right side is a back surface printing unit that performs back surface printing with respect to the conveyance path of the web W along the upward direction in the vertical direction.

  By the way, in each printing unit U1 to U6, the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are mounted with printing plates on the outer periphery, and these printing plates are used according to the printed matter. A plurality of plates are manufactured, and plate plates necessary for printing are mounted on the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b. Therefore, each of the printing units U1 to U6 is equipped with a plate clamping device for winding and fixing the printing plate around the outer peripheral surfaces of the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b.

  Hereinafter, the plate clamping device will be described. Here, the plate clamping device mounted on the plate cylinder 41a of the first stack 21 in the printing unit U1 will be described. FIG. 17 is a schematic diagram illustrating a plate clamping device, and FIGS. 18 and 19 are schematic diagrams illustrating a plate clamping operation by the plate clamping device.

  As shown in FIG. 17, in the plate cylinder 41a, the printing plate 71 is wound around a cylindrical outer peripheral surface. In the plate cylinder 41a, a gap portion 72 having a groove shape along the axial direction is formed in the outer peripheral portion, and a grip portion 72a having an edge portion sharply formed at one end portion in the circumferential direction of the gap portion 72. A tail edge portion 72b whose edge portion is sharpened at an acute angle is formed at the end portion. On the other hand, the printing plate 71 has a tail end 71a having an end bent at an acute angle at one end in the longitudinal direction (circumferential direction of the plate cylinder 41a) and an end bent at an acute angle at the other end. A bottom end portion 71b is formed.

  In the printing plate 71, the gripping end portion 71a enters the gap portion 72 of the plate cylinder 41a, and is brought into contact with and locked to the gripping portion 72a. The plate 71 has a tail edge side end portion 71 b that enters the gap portion 72 of the plate cylinder 41 a, contacts the tail edge portion 72 b, and is locked to the plate clamping device 73. The plate clamping device 73 has a tension bar 74 disposed in the gap portion 72 along the axial direction of the plate cylinder 41a. The tension bar 74 is rotatably provided in the gap portion 72, and a locking claw 74 a projects from the outer peripheral portion. The locking claw 74 a is engaged with the tail edge side end portion 71 b of the printing plate 71. It is possible to stop. The tension bar 74 has a lever 74b fixed to the outer periphery thereof.

  The plate cylinder 41a is provided with a spring support member 75 adjacent to the gap portion 72, and a guide shaft 76 is fitted in the guide hole 75a so as to be movable in the axial direction. The compression coil spring 77 is disposed around the guide shaft 76 and is stretched between the spring support member 75 and the head portion 76 a of the guide shaft 76. The lever 74b of the tension bar 74 and the head portion 76a of the guide shaft 76 are rotatably connected by a connecting shaft 78. Therefore, the tension bar 74 is urged and supported in the clockwise direction in FIG. 17, that is, in the direction in which the locking claw 74 a is locked to the tail edge side end portion 71 b of the printing plate 71.

  Further, on the outer peripheral side of the plate cylinder 41a, a locking claw operating cylinder (air cylinder) 79 is disposed adjacent to the plate clamping device 73. The locking claw operating cylinder 79 is a locking claw operating rod (operating member). ) 79a can be moved in the axial direction. The locking claw operating rod 79a is disposed at a position facing the guide shaft 76 (head 76a) of the plate clamping device 73.

  The plate clamping device 73 and the locking claw operating cylinder 79 are disposed on the axial end side of the plate cylinder 41a, and the locking claw operating cylinder 79 is supported by a printing machine frame (not shown).

  The plate clamping device 73 has a tension bar 74 that is biased and supported by the compression coil spring 77, and the locking claw 74a is locked to the tail edge side end portion 71b of the printing plate 71. 71 is constrained to the outer peripheral surface of the plate cylinder 41a. Therefore, when removing the printing plate 71 from the plate cylinder 41a, the locking claw operating rod 79a of the locking claw operating cylinder 79 is extended, the guide shaft 76 is pressed against the urging force of the compression coil spring 77, and the lever 74b. The tension bar 74 is rotated counterclockwise in FIG. Then, the locking claw 74 a is separated from the tail edge side end portion 71 b of the printing plate 71, so that the restriction of the tail edge side end portion 71 b is released, and the tail edge side end portion 71 b is released from the gap portion 72. The cylinder 41a can be taken out of the cylinder 41a, and the printing plate 71 can be removed from the cylinder 41a by rotating the plate cylinder 41a.

  On the other hand, when the printing plate 71 is mounted on the plate cylinder 41a, as shown in FIG. 18, the grip-side end portion 71a of the printing plate 71 is locked to the gripping portion 72a of the plate cylinder 41a. In FIG. 18, the plate 71 is wound around the plate cylinder 41 a by rotating counterclockwise, and the tail edge side end portion 71 b is positioned outside the gap portion 72. Then, the operator manually presses the outer peripheral surface of the tail edge side end portion 71 b of the printing plate 71 and extends the locking claw operating rod 79 a by the locking claw operating cylinder 79. Then, the latching claw operating rod 79a presses the guide shaft 76 to rotate the tension bar 74 counterclockwise in FIG. 18, and the latching claw 74a moves to the release position. Here, as shown in FIG. 19, when the operator pushes the tail edge side end portion 71 b of the printing plate 71 by hand, the tail edge side end portion 71 b enters the gap portion 72. Here, when the latching claw actuation rod 79 a is contracted by the latching claw actuation cylinder 79, the latching claw actuation rod 79 a is separated from the guide shaft 76, and the tension bar 74 is applied by the urging force of the compression coil spring 77. Then, the locking claw 74a is locked to the tail edge side end portion 71b of the printing plate 71, thereby restraining the printing plate 71 to the outer peripheral surface of the plate cylinder 41a.

  The plate clamping system according to the present embodiment enables one worker to perform the work of mounting the printing plate 71 on the plate cylinder 41a. FIG. 1 is a block diagram showing a plate clamping system of the present embodiment, FIG. 2 is a schematic front view showing a printing unit to which the plate clamping system is applied, and FIG. 3 is a schematic plan view showing the printing unit.

  In this embodiment, as shown in FIGS. 1 to 3, the plate clamping system 80 includes a plate clamping device 73, a locking claw operating cylinder (locking claw operating device) 79, a main operation panel 81, and a clamp operation panel. 82, 83, a timer 84, and a control device 85.

  As shown in FIG. 17, the plate clamping device 73 fastens the printing plate 71 by locking the locking claw 74a to the end of the printing plate 71 wound around the outer peripheral surface of the plate cylinders 41a, 41b, 42a, 42b. To do. The locking claw operating cylinder 79 engages and disengages the locking claw 74 a with respect to the end portion of the printing plate 71. As shown in FIGS. 1 to 3, the main operation panel 81 is provided with various switches that are operated when performing plate replacement work (plate removal work and plate mounting work). The clamp operation panels 82 and 83 are provided with a switch for locking the locking claw 74 a to the end of the printing plate 71 by operating the locking claw operating cylinder 79. The timer 84 measures an elapsed time after a predetermined signal is input. The control device 85 controls the operation of the plate cylinders 41a, 41b, 42a, 42b, the locking claw operating cylinder 79, and the like according to signals input from the main operation panel 81 and the clamp operation panel 82.

  Here, the relationship between the plate cylinders 41a, 41b, 42a, 42b and the printing plate 71 will be described. FIG. 14-1 is a schematic diagram showing the phase alignment operation of the gap portion of the plate cylinder, FIG. 14-2 is a schematic diagram showing the plate-hanging operation on the plate cylinder, and FIG. 14-3 is the plate winding on the plate cylinder. FIG. 14-4 is a schematic diagram illustrating the work of fastening the plate to the plate cylinder.

  As shown in FIG. 14A, the plate cylinder 41a (the same applies to the plate cylinders 41b, 42a, and 42b) has four plate mounting areas A1, A2, A3, and A4 secured along the axial direction. A gap portion 72 is provided along the axial direction so as to penetrate the plate mounting regions A1, A2, A3, and A4 on the outer peripheral portion. As shown in FIG. 14B, the plate cylinder 41a can mount the printing plates 71A, 71B, 71C, 71D in the printing plate mounting areas A1, A2, A3, A4. In this case, the operator first locks the end portions 71Aa, 71Ba, 71Ca, 71Da of the printing plates 71A, 71B, 71C, 71D in the gap portion 72 of the plate cylinder 41a, and next, FIG. As shown in FIG. 3, the plate cylinder 41a is rotated forward to wind the printing plates 71A, 71B, 71C, 71D around the outer periphery. 14-4, the operator pushes the other end portions 71Ab, 71Bb, 71Cb, 71Db of the printing plates 71A, 71B, 71C, 71D into the gap portion 72 with the left hand and the right hand. Here, by operating the locking claw operating cylinder 79, each locking claw 74a locks the other end portion 71Ab, 71Bb, 71Cb, 71Db of each printing plate 71A, 71B, 71C, 71D.

  In the plate clamping device 73, locking claws 74a are arranged in the respective plate mounting areas A1, A2, A3, A4, and each locking claw 74a is the other end of each printing plate 71A, 71B, 71C, 71D. 71Ab, 71Bb, 71Cb, 71Db can be individually locked (restrained). The latching claw operating cylinder 79 can individually actuate the latching claws 74a that latch the other end portions 71Ab, 71Bb, 71Cb, 71Db of the printing plates 71A, 71B, 71C, 71D.

  As shown in FIGS. 2 and 3, in the first stack 21 and the second stack 22, printing machine frames 91 and 92 are erected on the left and right, and in the space between the printing machine frames 91 and 92, Blanket cylinders 31a and 31b and plate cylinders 41a and 41b are arranged on the side, and blanket cylinders 32a and 32b and plate cylinders 42a and 42b are arranged on the upper side, and each blanket cylinder 31a, 31b, 32a, 32b and plate cylinder 41a, 41b, 42a, and 42b are supported by the printing machine frames 91 and 92 so as to be driven and rotated. Further, between the left and right printing machine frames 91 and 92, work tables 93a and 93b are disposed below the operator side, and covers 94a and 94b are disposed above and on the front side of the work tables 93a and 93b. Work floors 95a and 95b are provided on which workers perform plate mounting work.

  Since the plate cylinders 41a, 41b, 42a, and 42b have four plate mounting areas A1, A2, A3, and A4, the operator can set the plate mounting areas A1, A2, A3, and so on. The plate replacement work of the printing plate 71 is performed on the corresponding work floors 95a and 95b of A4. Main operation panels 81 (81a, 81b) are provided on the work floors 95a, 95b side of the work tables 93a, 93b, respectively. The clamp operation panel 82 (82a, 82b) is disposed along the axial direction of the plate cylinders 41a, 41b adjacent to the contact position between the blanket cylinders 31a, 31b and the plate cylinders 41a, 41b. The clamp operation panel 83 (83a, 83b) is disposed along the axial direction of the plate cylinders 42a, 42b adjacent to the contact position between the blanket cylinders 32a, 32b and the plate cylinders 42a, 42b.

  FIG. 4 is a schematic diagram showing the arrangement configuration of the clamp operation panel in the printing unit, and FIG. 5 is a schematic diagram showing a modification of the arrangement configuration of the clamp operation panel in the printing unit.

  As shown in FIG. 4, in the first stack 21, the safety bar 101 is disposed along the axial direction of the plate cylinder 41a adjacent to the contact position of the blanket cylinder 31a and the plate cylinder 41a. The attachment member 102 is disposed on the opposite side of the safety bar 101 from the blanket cylinder 31a and along the axial direction of the plate cylinder 41a. The safety bar 101 and the mounting member 102 are fixed to the printing machine frames 91 and 92 (see FIG. 3) at the ends in the longitudinal direction. The attachment member 102 includes a ceiling portion 102a and a vertical wall portion 102b, and the clamp operation panel 82a (82b) is fixed to the vertical wall portion 102b of the attachment member 102. In the second stack 22, the safety bar 103 is disposed along the axial direction of the plate cylinder 42a adjacent to the contact position of the blanket cylinder 32a and the plate cylinder 42a. The attachment member 104 is disposed along the axial direction of the plate cylinder 42a on the opposite side of the safety bar 103 from the blanket cylinder 32a. The safety bar 103 and the attachment member 104 are fixed to the printing machine frames 91 and 92 (see FIG. 3) at the ends in the longitudinal direction. The mounting member 104 includes a ceiling portion 104a and a vertical wall portion 104b, and the clamp operation panel 83a (83b) is fixed to the vertical wall portion 104b of the mounting member 104. In this way, the clamp operation panel 82a (82b) of the first stack 21 is disposed above the plate cylinder 41a (41b), and the clamp operation panel 83a (83b) of the second stack 22 is disposed on the plate cylinder 42a (42b). It is arranged below.

  In addition, the mounting position of each clamp operation panel 82a, 82b, 83a, 83b is not limited to the position mentioned above. For example, as shown in FIG. 5, in the first stack 21, a work table 93a (93b) is disposed on the front side of the plate cylinder 41a (41b), and the work table 93a (93b) has a clamp operation panel 82a ( 82b) may be provided. In this case, the clamp operation panel 82a (82b) may be provided on the upper surface of the work table 93a (93b), but the clamp operation panel 82a (82b) is embedded in the work table 93a (93b) from the viewpoint of workability. By doing so, it is preferable to flatten the upper surface of the work table 93a (93b). In the second stack 22, a cover 94a (94b) is disposed on the front side of the plate cylinder 42a (42b), and a clamp operation panel 83a (83b) may be provided on the cover 94a (94b). In this case, the clamp operation panel 83a (83b) may be provided on the lower surface of the cover 94a (94b), but the clamp operation panel 83a (83b) is embedded in the cover 94a (94b) from the viewpoint of safety. Thus, it is preferable to flatten the lower surface of the cover 94a (94b).

  In addition, each clamp operation panel 82a, 82b, 83a, 83b is mounted on the mounting members 102, 104 or mounted on the work tables 93a, 93b and covers 94a, 94b. You may wear it.

  First, the main operation panel 81 (81a, 81b) and the clamp operation panels 82 (82a, 82b), 83 (83a, 83b) will be described. The main operation panels 81a and 81b have almost the same configuration, and the clamp operation panels 82a, 82b, 83a and 83b have almost the same configuration, so the main operation panel 81a and the clamp operation panel 82a will be described in detail. explain. FIG. 6 is a front view of the main operation panel, and FIG. 7 is a front view of the clamp operation panel.

  As shown in FIG. 6, the main operation panel 81a includes a standard panel 201 and auto clamp panels 202 and 203 arranged on both sides thereof. The standard panel 201 includes stack selection switches 211 and 212, a plate cylinder forward rotation switch 213, a plate cylinder reverse rotation switch 214, a plate cylinder home position stop switch 215, and a stop / safety switch 216. The stack selection switch 211 selects the plate cylinder 41a of the first stack 21, and the stack selection switch 212 selects the plate cylinder 42a of the second stack 22. The plate cylinder normal rotation switch 213 rotates the plate cylinders 41a and 42a selected by the stack selection switches 211 and 212 in the normal direction. The plate cylinder reversing switch 214 reverses the plate cylinders 41a and 42a selected by the stack selection switches 211 and 212. The plate cylinder fixed position stop switch 215 rotates and stops the plate cylinders 41a and 42a selected by the stack selection switches 211 and 212 to a fixed position. The stop / safety switch 216 prohibits the rotation of the plate cylinders 41a and 42a by the plate cylinder normal rotation switch 213 and the plate cylinder reverse switch 214, and before operating the plate cylinder normal rotation switch 213 and the plate cylinder reverse switch 214. To operate. Further, the stop / safety switch 216 can urgently stop the rotation of the plate cylinders 41a and 42a during normal rotation or reverse rotation.

  The auto clamp panel 202 corresponds to the printing plate mounting areas A1 and A2 of the plate cylinders 41a and 42a. The surface selection switches 221, 222, 223, and 224, the collective switches 225 and 226, and the plate removal switch 227 are used. And a plate mounting switch 228. The auto clamp panel 203 corresponds to the plate mounting areas A3 and A4 of the plate cylinders 41a and 42a. The surface selection switches 231, 232, 233 and 234, the collective switches 235 and 236, and the plate removal switch 237 are used. And a plate mounting switch 238.

  The surface selection switches 221, 222, 223, 224, 231, 232, 233, and 234 have printing plate mounting areas A 1, A 2, A 3, and A 4 for removing and mounting the printing plate 71 from the plate cylinders 41 a and 42 a. To choose. The collective switches 225, 226, 235, and 236 select all the plate mounting areas A1, A2, A3, and A4 where the plate 71 is removed and mounted on the plate cylinders 41a and 42a. The plate removal switches 227 and 237 output a plate removal work start signal for removing the printing plate 71 from the plate cylinders 41a and 42a. The plate mounting switches 228 and 238 output start signals for plate mounting work for mounting the printing plate 71 on the plate cylinders 41a and 42a. In this case, each surface selection switch 221, 222, 223, 224, 231, 232, 233, 234 functions as an engagement / disengagement switch that operates each engagement claw 74a to the engagement position.

  As shown in FIG. 7, the clamp operation panel 82 a includes four clamp switches 241, 242, 243, 244, two clamp switches 245, 246, a clamp position lamp 247, and a plate hanging position lamp 248. And surface selection lamps 249, 250, 251, 252. The clamp switches 241, 242, 243, and 244 correspond to the printing plate mounting areas A1, A2, A3, and A4, and each of the printing plate mounting areas A1, A2, A3, and A4 can be operated. The locking claw 74a can be immediately moved to the locking position without waiting time. The clamp switches 245 and 246 correspond to the printing plate mounting areas A1 and A2 and the printing plate mounting areas A3 and A4, respectively. When operated, the clamp switches 245 and 246 correspond to the printing plate mounting areas A1, A2, A3, and A4. The locking claw 74a can be operated to the locking position after a predetermined time. The predetermined time is, for example, in the range of 3 to 5 seconds, and is such that the operator can press the tail edge side end portion 71b of the printing plate 71 after operating the clamp switches 245 and 246. It's time.

  The clamp position lamp 247 is lit when the rotational position of the plate cylinders 41a and 42a is stopped at the plate clamp position. The plate hanging position lamp 248 is lit when the rotational position of the plate cylinders 41a and 41b stops at the plate hanging position. The surface selection lamps 249, 250, 251, 252 display the surface positions of the plate cylinders 41 a, 42 a on which the plate 71 is mounted (plate mounting areas A 1, A 2, A 3, A 4). The clamp position lamp 247, the plate-hanging position lamp 248, and the surface selection lamps 249, 250, 251, and 252 are lamps having different colors.

  Next, the arrangement of the clamp operation panels 82a and 83a will be described. 8 is a side view for explaining the arrangement of the clamp operation panel in the first stack, FIG. 9 is a front view for explaining the arrangement of the clamp operation panel in the first stack, and FIG. 10 is in the second stack. FIG. 11 is a side view for explaining the arrangement of the clamp operation panels, and FIG. 11 is a front view for explaining the arrangement of the clamp operation panels in the second stack. Here, the clamp switch 242 provided on the clamp operation panel 82a will be described. However, other clamp switches 241, 243, 244 provided on the clamp operation panel 82a and the clamp switches provided on the clamp operation panel 83a. The same applies to 241, 242, 243, and 244.

  As shown in FIGS. 8 and 9, when the locking operation of the tail edge side end portion 71 b of the printing plate 71 is performed in the first stack 21, the clamp switch 242 is operated by the operator's hand. It is arranged in an area where the operator's finger can reach while holding the tail edge 71b. That is, when the tail edge side end portion 71b of the printing plate 71 wound around the plate cylinder 41a is inserted into the gap portion 72 and locked to the locking claw 74a, the rotation position of the plate cylinder 41a is set in advance. The positioning is stopped at the plate clamping position. The plate clamping position is a rotational position where the gap portion 72 of the plate cylinder 41a is between the work table 93a and the safety bar 101 and is within the reach of the operator. Therefore, when the rotation position of the plate cylinder 41a is stopped at the plate clamp position, the clamp switch is in an area where the operator's finger can reach while the operator's hand is pressing the tail edge side end portion 71b of the plate 71. 242 is arranged.

  Further, the clamp operation panel 82a provided with the clamp switches 241, 242, 243, and 244 is disposed on one side in the circumferential direction of the plate cylinder 41a with respect to the gap portion 72 of the plate cylinder 41a stopped at the plate clamping position. That is, in FIG. 8, it is disposed on the counterclockwise direction side of the plate cylinder 41a. Actually, the clamp operation panel 82a is disposed above the gap portion 72 of the plate cylinder 41a stopped at the plate clamping position.

  Hereinafter, the positional relationship between the printing plate 71 and the clamp switch 242 when the plate cylinder 41a is stopped at the printing plate clamp position will be specifically described. As described above, the plate cylinder 41a can mount four printing plates 71 along the axial direction, and the width of the printing plate 71 is in the range of 350 mm to 410 mm.

  The clamp switch 242 is disposed at the center position in the width direction of the printing plate 71 mounted on the plate cylinder 41a. In this case, it is desirable to arrange the clamp operation panel 82a so that its position can be adjusted in the axial direction of the plate cylinder 41a. For example, when the clamp operation panel 82 is fixed to the attachment member 102 with a bolt, a plurality of attachment holes are provided in the attachment member 102 or the attachment holes are formed as long holes. Further, the attachment member 102 to which the clamp operation panel 82a is attached may be adjustable in the axial direction of the plate cylinder 41a. When the clamp switch 242 is shifted from the center position in the width direction of the printing plate 71 toward one or the other in the width direction, it is desirable that the clamp switch 242 is disposed within 50 mm from the center position. Further, the clamp switch 242 itself may have a shape that is long in the width direction of the printing plate 71 in consideration of the amount by which the clamp switch 242 is shifted in the width direction of the printing plate 71.

  When the plate cylinder 41a is stopped at the plate clamping position, it is desirable to set the shortest distance La1 between the clamp switch 242 and the outer peripheral surface of the plate cylinder 41a to 100 mm or less. At this time, it is desirable to set the shortest distance Lb1 between the clamp switch 242 and the gap portion 72 of the plate cylinder 71 to 140 mm or less. Furthermore, it is desirable to set the shortest distance Lc1 between the clamp switch 242 and the axial end of the gap portion 72 of the plate cylinder 41a corresponding to the plate mounting area to 300 mm or less.

  When the shortest distances La1, Lb1, and Lc1 are defined, the starting point on the clamp switch 242 side is the outer peripheral portion of the clamp switch 242, the outer peripheral surface of the plate cylinder 41a, the gap portion 72, or the axial end portion of the gap portion 72. Is the closest position. The starting point of the gap portion 72 is an intermediate position in the circumferential direction of the plate cylinder 41a on the extension line of the outer peripheral surface of the plate cylinder 41a in the gap portion 72. The shortest distance La1 is a distance La1 from the clamp switch 242 to the outer peripheral surface of the plate cylinder 41a at a perpendicular line PL1 to the outer peripheral surface of the plate cylinder 41a connecting the clamp switch 242 and the center O1 of the plate cylinder 41a. The shortest distance Lb1 is the shortest distance from the clamp switch 242 to the starting point of the gap portion 72. Further, the shortest distance Lc1 is a distance from the clamp switch 242 to the axial end at the starting point of the gap portion 72 of the plate cylinder 41a.

  By setting the shortest distances La1, Lb1, and Lc1 to the above-described dimensions, when the plate cylinder 41a is stopped at the printing plate clamp position, the operator can use the left hand and the right hand to prepare the tail edge side edge 71b of the printing plate 71. The clamp switch 242 can be operated by shifting the finger of the left hand or the right hand (for example, thumb or index finger) upward while pressing almost the entire region in the width direction. In this case, when the operator opens his hand, the length from the tip of the thumb to the tip of the little finger is generally 200 mm to 300 mm, and the shortest distances La1, Lb1, Lc1 are set based on this length. did. Further, when the tail edge side end portion 71b of the printing plate 71 is pushed into the gap portion 72 of the plate cylinder 41a, the operator presses the tail edge side end portion 71b of the printing plate 71 with the left hand and the right hand. The starting point of the gap portion 72 and the position of the tail edge side end portion 71b of the printing plate 71 are substantially the same position.

  Further, as shown in FIGS. 10 and 11, when the locking operation of the tail edge side end portion 71b of the printing plate 71 is performed in the second stack 22, the clamp switch 242 is printed by the operator's hand. The plate 71 is disposed in an area where the operator's finger can reach while holding the tail edge side end 71b of the plate 71. The clamp operation panel 83a provided with the clamp switches 241, 242, 243, and 244 is disposed on the other side in the circumferential direction of the plate cylinder 42a with respect to the gap portion 72 of the plate cylinder 21a stopped at the plate clamping position. That is, in FIG. 10, it is disposed on the clockwise side of the plate cylinder 42a. Actually, the clamp operation panel 83a is disposed below the gap portion 72 of the plate cylinder 42a stopped at the plate clamping position.

  Hereinafter, the positional relationship between the printing plate 71 and the clamp switch 242 when the plate cylinder 42a is stopped at the printing plate clamp position will be specifically described. The clamp switch 242 is disposed at the center position in the width direction of the printing plate 71 mounted on the plate cylinder 42a. In this case, it is desirable to arrange the clamp operation panel 83a so that its position can be adjusted in the axial direction of the plate cylinder 42a. When the clamp switch 242 is shifted from the center position in the width direction of the printing plate 71 toward one or the other in the width direction, it is desirable that the clamp switch 242 is disposed within 50 mm from the center position.

  When the plate cylinder 42a stops positioning at the plate clamping position, it is desirable to set the shortest distance La2 between the clamp switch 242 and the outer peripheral surface of the plate cylinder 42a to 100 mm or less. At this time, it is desirable to set the shortest distance Lb2 between the clamp switch 242 and the gap portion 72 of the plate cylinder 71 to 140 mm or less. Furthermore, it is desirable to set the shortest distance Lc2 between the clamp switch 242 and the axial end of the gap portion 72 of the plate cylinder 42a to 300 mm or less.

  When the shortest distances La2, Lb2, and Lc2 are defined, the starting point on the clamp switch 242 side is the outer peripheral portion of the clamp switch 242, the outer peripheral surface of the plate cylinder 42a, the gap portion 72, or the axial end portion of the gap portion 72. Is the closest position. The starting point of the gap portion 72 is an intermediate position in the circumferential direction of the plate cylinder 42a on the extension line of the outer peripheral surface of the plate cylinder 42a in the gap portion 72. The shortest distance La2 is a distance La2 from the clamp switch 242 to the outer peripheral surface of the plate cylinder 42a at a perpendicular line PL2 to the outer peripheral surface of the plate cylinder 42a connecting the clamp switch 242 and the center O2 of the plate cylinder 42a. The shortest distance Lb2 is the shortest distance from the clamp switch 242 to the starting point of the gap portion 72. Further, the shortest distance Lc2 is a distance from the clamp switch 242 to the axial end at the starting point of the gap portion 72 of the plate cylinder 42a.

  By setting the shortest distances La2, Lb2, and Lc2 to the above-described dimensions, when the plate cylinder 42a is stopped at the printing plate clamp position, the operator can use the left hand and the right hand to prepare the tail edge side edge 71b of the printing plate 71. The clamp switch 242 can be operated by shifting the finger (for example, thumb) of the left hand or the right hand downward while pressing almost the entire region in the width direction. In this case, when the operator opens his hand, the length from the tip of the thumb to the tip of the little finger is generally 200 mm to 300 mm, and the shortest distances La2, Lb2, and Lc2 are set based on this length. did. Further, when pushing the tail edge side end portion 71b of the printing plate 71 into the gap portion 72 of the plate cylinder 42a, the operator presses the tail edge side end portion 71b of the printing plate 71 with the left hand and the right hand. The starting point of the gap portion 72 and the position of the tail edge side end portion 71b of the printing plate 71 are substantially the same position.

  Here, the plate removing operation and plate mounting operation by the plate clamping system 80 of the present embodiment will be described in detail.

  FIG. 12 is a flowchart showing a plate removing operation by the plate clamping system, and FIG. 13 is a flowchart showing a plate mounting operation by the plate clamping system. Note that the stop / safety switch 216 is always operated before various switch operations, but the description of the operation of the stop / safety switch 216 is omitted in the following description.

  First, in the plate removing operation by the plate clamping system 80 of the present embodiment, as shown in FIGS. 6, 7, and 12, the operator selects the surface selection switches 221, 222, and the like on the main operation panel 81 in step S <b> 11. 223, 224, 231, 232, 233, 234 are operated (ON). In this case, the printing plate 71 to be removed is selected from the printing plates 71 mounted on the plate cylinders 41a and 42a by the surface selection switches 221, 222, 223, 224, 231, 232, 233, and 234. Here, when removing all the printing plates 71, one of the collective switches 225, 226, 235, and 236 is selected. In step S12, on the clamp operation panels 82 and 83, the surface selection lamps 249, 250, 251, and 252 corresponding to the selected plate 71 are turned on.

  In step S13, the operator operates (ON) the plate removal switch 227 or 237. In step S14, the control device 85 determines whether or not the plate cylinders 41a and 42a are stopped at the plate clamping position. Here, when it is determined that the plate cylinders 41a and 42a are stopped at the plate clamping position (Yes), the process proceeds to step S18. On the other hand, if it is determined (No) that the plate cylinders 41a and 42a are not stopped at the plate clamping position, the clamp position lamp 247 blinks in step S15. The operator confirms that the clamp position lamp 247 is blinking, and operates (turns on) the plate cylinder reverse switch 214 in step S16. Then, in step S17, the plate cylinder 41a or 42a is reversed and positioned by stopping at the plate clamping position. Note that the rotation positions (rotation angles) of the plate cylinders 41a and 42a are detected by a detector (not shown), and the control device 85 grasps the rotation positions of the plate cylinders 41a and 42a.

  When the plate cylinders 41a and 42a stop at the plate clamping position, the clamp position lamp 247 switches from blinking to lighting at step S18, and the clamping of the selected plate 71 is released at step S19. That is, the control device 85 operates the locking claw operating cylinder 79 corresponding to the corresponding printing plate 71 and releases the locking of the printing plate 71 by the locking claw 74a. Then, the tail edge side end portion 71b of the plate 71 whose clamp is released moves to the side away from the plate cylinders 41a and 42a. Here, when the operator operates (turns on) the plate cylinder reversing switch 214 in step S20, the plate cylinder 41a, 42a starts reversing in step S21 and the printing plate 71 wound around the outer periphery is loaded. It is extended to the near side. When the plate cylinders 41a and 42a are stopped at the plate-hanging position in step S22, the surface selection lamps 249, 250, 251, and 252 are turned off in step S23, and the clamp position lamp 247 is turned off in step S24. In step S25, the plate hanging position lamp 248 is turned on. Therefore, in step S26, the operator sequentially removes the printing plate 71 in which the tail end 71a is locked to the plate cylinders 41a and 42a. Here, the plate removal work is completed.

  Next, in the plate mounting operation by the plate clamping system 80 of the present embodiment, as shown in FIGS. 6, 7, and 13, the operator selects the surface selection switches 221 and 222 of the main operation panel 81 in step S <b> 31. , 223, 224, 231, 232, 233, 234 are operated (ON). In this case, the area of the printing plate 71 to be mounted is selected from the printing plates 71 mounted on the plate cylinders 41a and 42a by the surface selection switches 221, 222, 223, 224, 231, 232, 233, and 234. Here, when all the printing plates 71 in the plate cylinder 41a are mounted, one of the collective switches 225 and 235 is selected. The collective buttons 225 and 235 are buttons for selecting the surface selection buttons 221, 222, 231, and 232 of the stack 21 at a time, and the same operation can be performed regardless of which one is selected. In addition, when all the printing plates 71 in the plate cylinder 42a are mounted, one of the collective buttons 226 and 236 is selected. The collective buttons 226 and 236 are buttons for selecting the surface selection buttons 223, 224, 233, and 234 of the stack 22 at the same time, and the same operation is possible regardless of which one is selected. In step S 32, the surface selection lamps 249, 250, 251, 252 corresponding to the selected plate 71 area are lit on the clamp operation panels 82, 83.

  In step S33, the operator operates (ON) the plate mounting switch 228 or 238. In step S34, the control device 85 determines whether or not the plate cylinders 41a and 42a are stopped at the plate hanging position. Here, if it is determined that the plate cylinders 41a and 42a are stopped at the plate-hanging position (Yes), the process proceeds to step S38. On the other hand, if it is determined (No) that the plate cylinders 41a, 42a are not stopped at the plate hanging position, the plate hanging position lamp 248 blinks in step S35. The operator confirms that the plate-hanging position lamp 248 is blinking, and operates (ON) the plate cylinder forward rotation switch 213 in step S36. Then, in step S37, the plate cylinder 41a or 42a rotates forward and is positioned by stopping at the plate hooking position.

  When the plate cylinders 41a and 42a are stopped at the plate hanging position, the plate hanging position lamp 248 is switched from blinking to lighting in step S38. The operator confirms that the plate-hanging position lamp 248 is turned on, and in step S39, the operator performs a plate-hanging operation for locking the grip-side end portion 71a of the printing plate 71 to the gap portion 72 of the plate cylinders 41a and 42a. When the printing plate 71 is loaded on all selected areas in the plate cylinders 41a and 42a, the plate loading position lamp 248 is turned off in step S40. Here, when the operator operates (ON) the plate cylinder normal rotation switch 213 in step S41, the plate cylinders 41a and 42a start normal rotation in step S42, and the printing plate 71 is placed on the outer periphery. Wrapped. In step S43, when the plate cylinders 41a, 42a around which the printing plate 71 is wound around the outer periphery stop at the printing plate clamp position, the clamp position lamp 247 is turned on in step S44, and selected in step S45. The clamp corresponding to the area of the plate 71 is released. That is, the control device 85 operates the locking claw operating cylinder 79 corresponding to the corresponding printing plate 71 and moves the locking claw 74 a to the release position of the printing plate 71.

  When the clamp corresponding to the selected area of the printing plate 71 is released, the surface selection lamps 249, 250, 251, and 252 blink in step S46. In step S47, the operator pushes the tail edge side end portion 71b of the printing plate 71 in the area where the surface selection lamps 249, 250, 251, and 252 are blinking into the gap portion 72 by pressing with the left hand and the right hand, and the left hand. With the right hand holding the tail end 71b with the right hand, for example, one of the clamp switches 241, 242, 243, 244 is operated (ON) with the thumb of the right hand. Then, the control device 85 receives signals from the clamp switches 241, 242, 243, and 244 to actuate the corresponding latching claw operating cylinder 79, and moves the latching claw 74a to the locking position. The tail edge side end portion 71b of the printing plate 71 is locked by 74a. When there are a plurality of printing plates 71 to be mounted on the plate cylinders 41a and 42a, the operator sequentially performs the same operation on all the printing plates 71. When the clamping of all the printing plates 71 is completed in step S48, the clamp position lamp 247 is turned off in step S49, and the surface selection lamps 249, 250, 251, and 252 are turned off in step S50. Here, the plate mounting operation is completed.

  In the above description, as shown in FIG. 14-2, the plate cylinder 41a has four plate mounting areas A1, A2, A3, and A4 secured along the axial direction. Although it has been described that the plates 71A, 71B, 71C, and 71D can be mounted in the areas A1, A2, A3, and A4, respectively, the present invention is not limited to this configuration. For example, the plate 71 has a width corresponding to two plates (or three plates) of the plates 71A, 71B, 71C, 71D. For example, it is mounted on the two printing plate mounting areas A1 and A2 of the plate cylinder 41a. In this case, a clamp switch 245 (246) is used as shown in FIG.

  That is, first, the plate cylinders 41a and 42a are stopped at the plate-hanging position, and the plate end 41a of the printing plate 71 is locked to the gap portion 72, and then the plate cylinders 41a and 42a are rotated forward. Then, the plate cylinders 41a and 42a are wound around the outer peripheral portion of the plate 71 and stopped at the plate clamp position, and then the clamp is released. Next, the operator operates (ON) the clamp switch 245 (246). Then, the control device 85 starts the operation of the timer 84 and determines the elapse of a predetermined time from the signal input of the clamp switch 245 (246). On the other hand, the operator pushes the tail edge side end portion 71b of the plate 71 to be loaded into the gap portion 72 by pressing it with the left hand and the right hand before the predetermined time elapses. Then, when a predetermined time has elapsed, the control device 85 operates the locking claw operating cylinder 79 to move the locking claw 74a to the locking position, and the locking claw 74a causes the tail edge side end of the printing plate 71 to move. The part 71b is locked. Therefore, the printing plate 71 is mounted on the outer peripheral surface of the plate cylinder 41 a by the plate clamping device 73.

  As described above, in the plate clamping system of the present embodiment, the locking claw 74a is engaged with the tail edge side end portion 71b of the printing plate 71 wound around the outer peripheral surface of the plate cylinder 41a (41b, 42a, 42b). A plate clamping device 73 for stopping and fastening the printing plate 71, a locking claw operating cylinder 79 for engaging and disengaging the locking claw 74a with respect to the tail edge side end portion 71b of the printing plate 71, and a locking claw operating cylinder Clamp switches 241, 242, 243, and 244 are provided to lock the locking claw 74 a to the tail edge 71 b of the printing plate 71 by operating 79, and the operator's hand holds the printing plate 71. Clamp switches 241, 242, 243, and 244 are arranged in the area where the operator's finger can reach with the bottom end 71 b pressed.

  Therefore, when the printing plate 71 is mounted on the plate cylinder 41a, the operator locks the end 71a of the printing plate 71 on the plate cylinder 41a and winds the printing plate 71 around the outer peripheral surface of the plate cylinder 41a. After that, when the clamp switches 241, 242, 243, and 244 are operated with fingers while holding the tail edge side end 71b of the printing plate 71 by hand, the plate clamping device 73 is operated by the locking claw operating cylinder 79. Thus, the locking claw 74 a is locked to the tail edge side end portion 71 b of the printing plate 71. As a result, the work of mounting the printing plate 71 on the plate cylinder 41a can be performed by one operator, and the workability can be improved by performing the rapid plate replacement work. Further, it is only necessary to provide the clamp switches 241, 242, 243, and 244 in addition to the existing plate clamping device 73 and the locking claw operating cylinder 79, so that a large-scale device is not required and the device is simplified and the manufacturing cost is reduced. be able to.

  In the plate clamping system of this embodiment, the clamp switches 241, 242, 243, and 244 are arranged at the center position in the width direction of the printing plate 71 mounted on the plate cylinder 41a. Accordingly, when the operator presses the plate 71 with the left hand and the right hand, the clamp switches 241, 242, 243, and 244 can be easily operated with the thumb of the left hand or the thumb of the right hand.

  In the plate clamping system of this embodiment, the clamp switches 241, 242, 243, and 244 are arranged within 50 mm from the center position in the width direction of the printing plate 71 attached to the plate cylinder 41a toward one or the other in the width direction. ing. Accordingly, when the operator presses the plate 71 with the left hand and the right hand, the clamp switches 241, 242, 243, and 244 can be easily operated with the thumb of the left hand or the thumb of the right hand.

  In the plate clamping system of the present embodiment, the clamp operation panels 82 and 83 provided with the clamp switches 241, 242, 243 and 244 are arranged so as to be adjustable in the axial direction of the plate cylinder 41a. Therefore, by adjusting the positions of the clamp switches 241, 242, 243, and 244 to the left and right according to the dominant hand of the operator, the clamp switches 241, 242, 243, and 244 can be easily operated with the thumb of the dominant hand.

  In the plate clamping system of the present embodiment, the shortest distance between the clamp switches 241, 242, 243, 244 and the outer peripheral surface of the plate cylinder 41a is set to 100 mm or less. Therefore, the operability of the clamp switches 241, 242, 243, 244 by the operator can be improved by arranging the clamp switches 241, 242, 243, 244 in the vicinity of the outer peripheral surface of the plate cylinder 41a.

  In the plate clamping system of the present embodiment, when the rotation position of the plate cylinder 41a stops at the plate clamping position, the operator's hand holds the other end portion 71a of the plate 71 and reaches the area where the operator's finger can reach. Clamp switches 241, 242, 243, and 244 are arranged. Therefore, after the printing plate 71 having the tail end 71a locked to the plate cylinder 41a is wound around the outer peripheral surface of the plate cylinder 41a, the tail edge 71b of the printing plate 71 is locked to the plate cylinder 41a. When doing so, the plate cylinder 41a is rotated and stopped at the plate clamping position. At this time, by placing the clamp switches 241, 242, 243, and 244 in an area where the finger can reach while the operator's hand is pressing the tail edge side end portion 71b of the printing plate 71, one worker can make the plate. The plate 71 can be attached to the cylinder 41a, and workability can be improved.

  In the plate clamping system of the present embodiment, the shortest distance between the clamp switches 241, 242, 243, 244 and the gap portion 72 of the plate cylinder 41a is set to 140 mm or less. Therefore, the operator can operate the clamp switches 241, 242, 243, and 244 while appropriately pressing the tail edge side end portion 71b of the printing plate 71 with the left hand and the right hand.

  In the plate clamping system of the present embodiment, the shortest distance between the clamp switches 241, 242, 243, 244 and the axial end of the gap portion 72 of the plate cylinder 41a corresponding to the plate mounting area is set to 300 mm or less. . Accordingly, the operator can operate the clamp switches 241, 242, 243, and 244 while pressing the entire width direction of the tail edge side end portion 71b of the printing plate 71 with the left hand and the right hand.

  In the plate clamping system of this embodiment, the plate cylinders 41a, 41b, and 42a are opposed to the gap portions 72 of the plate cylinders 41a, 41b, 42a, and 42b in which the clamp switches 241, 242, 243, and 244 are stopped at the plate clamping position. 42b are arranged on one side in the circumferential direction or on the other side in the circumferential direction. Therefore, the clamp switches 241, 242, and 243 can be easily obtained by merely shifting the finger in the circumferential direction of the plate cylinders 41 a, 41 b, 42 a, and 42 b while the operator presses the tail edge side end portion 71 b of the printing plate 71 with the left and right hands. , 244 can be operated.

  In the plate clamping system of the present embodiment, the plate cylinders 41a, 41b, 42a, 42b and the blanket cylinders 31a, 31b, 32a, 32b are adjacent to the contact positions along the axial direction of the plate cylinders 41a, 41b, 42a, 42b. The mounting members 102 and 104 are arranged, and the clamp operation panels 82 and 83 provided with the clamp switches 241, 242, 243 and 244 are provided on the mounting members 102 and 104, respectively. Therefore, the clamp switches 241, 242, 243 and 244 can be arranged without contacting the plate cylinders 41a, 41b, 42a and 42b and the blanket cylinders 31a, 31b, 32a and 32b. In addition, when the clamp switches 241, 242, 243, 244 are soiled by ink or the like, the clamp operation panels 82, 83 (clamp switches 241, 242, 243, 244) are removed from the mounting members 102, 104 for easy cleaning. Can do.

  In the plate clamping system of the present embodiment, the plate cylinders 41a, 41b, 42a, 42b and the blanket cylinders 31a, 31b, 32a, 32b are adjacent to the contact positions along the axial direction of the plate cylinders 41a, 41b, 42a, 42b. The safety bars 101 and 103 are arranged, and the clamp operation panels 82 and 83 are provided on the safety bars 101 and 103. Therefore, it is possible to simplify the structure by eliminating the need for a separate mounting member for the clamp operation panels 82 and 83.

  In the plate clamping system of this embodiment, the plate cylinders 41a, 41b, 42a, and 42b can mount a plurality of printing plates 71 along the axial direction, and the plate clamping device 73 individually attaches the plurality of printing plates 71. The latching claw actuating device 79 has a plurality of latching claw actuating rods 79a that individually actuate the plurality of latching claws 74a, and includes clamp switches 241, 242, and 243. , 244 are provided corresponding to the plurality of locking claw actuating rods 79a. Accordingly, by providing a plurality of clamp switches 241, 242, 243, and 244 corresponding to the plurality of printing plates 71 mounted on the plate cylinders 41a, 41b, 42a, and 42b, the plurality of printing plates 71 can be efficiently used as plate cylinders. Can be installed.

  In the plate clamping system of this embodiment, the clamp switches 241, 242, 243, and 244 are provided on the clamp operation panels 82 and 83 that are fixed at predetermined positions. Therefore, when there are a plurality of clamp switches 241, 242, 243, and 244, a plurality of clamp switches 241, 242, 243, and 244 may be provided on the clamp operation panels 82 and 83, and the clamp switches 241, 242, 243, and 244 Mounting can be facilitated.

  In the plate clamping system of the present embodiment, the clamp operation panels 82 and 83 include a clamp position lamp 247 that is turned on when the plate cylinders 41a, 41b, 42a, and 42b are stopped at the plate clamp position, and the plate cylinders 41a, 41b, A plate-hanging position lamp 248 that lights when 42a, 42b stops at the plate-hanging position, and a surface selection lamp 249, 250, 251 that displays the surface positions of the plate cylinders 41a, 41b, 42a, 42b on which the printing plate 71 is mounted. , 252. Accordingly, the operator can turn on the plate cylinders 41a, 41b, 42a, and the like at the time of plate removal work and plate mounting work by lighting the clamp position lamp 247, the plate hanging position lamp 248, and the surface selection lamps 249, 250, 251, and 252. The situation of 42b and the printing plate 71 can be visually observed, and the safety of work can be improved.

  In the plate clamping system of this embodiment, an engagement / disengagement switch (surface selection switches 221, 222, 223, 224, 231, 232, 233, 234) for operating the locking claw operation cylinder 79 and plate cylinders 41a, 41b, 42a. , 42b and a plate cylinder forward rotation switch 213 and a plate cylinder reverse switch 214 for rotating the plate cylinders 41a, 41b, 42a, 42b in reverse. Accordingly, by providing the main operation panel 81 including the engagement / disengagement switch, the plate cylinder forward rotation switch 213, and the plate cylinder reverse rotation switch 214, in addition to the clamp switches 241, 242, 243, 244, the clamp switch 241, It is only necessary to provide 242, 243, 244, the structure of the clamp operation panels 82, 83 can be simplified, and the engagement / disengagement switch having the same function as the clamp switches 241, 242, 243, 244 is used as the main. Even when the clamp switches 241, 242, 243, and 244 are faulty, provided on the operation panel 81, the plate mounting operation can be performed.

  In the plate clamping system of the present embodiment, clamp switches 245 and 246 used when the wide printing plate 71 is mounted on the plate cylinders 41a, 41b, 42a and 42b, and an operation command signal by operating the clamp switches 245 and 246 are used. Is input, a control device 85 is provided for operating the locking claw operating cylinder 79 after elapse of a predetermined time. Therefore, when the operation command signal is input, the control device 85 operates the locking claw operation cylinder 79 after a predetermined time has elapsed, so that a waiting time of a predetermined time is ensured from the input of the operation command signal. During this waiting time, the tail edge side end portion 71b of the printing plate 71 wound around the outer peripheral surfaces of the plate cylinders 41a, 41b, 42a, 42b can be pressed from the outside. As a result, it is possible for a single operator to perform the work of mounting the printing plate 71 on the plate cylinders 41a, 41b, 42a, and 42b, and the workability is improved by performing a quick plate replacement operation. be able to.

  In the plate clamping method of the present embodiment, the plate end 71a is locked to the plate cylinder 41a (41b, 42a, 42b) and the printing plate 71 wound around the outer peripheral surface of the plate cylinder 41a. When the tail edge side end portion 71b of the printing plate 71 is locked to the plate cylinder 41a, the tail edge side edge portion 71b of the printing plate 71 is pushed into the gap portion 72 of the plate cylinder 41a with the left and right hands of the operator. The clamp switches 241, 242, 243, and 244 are operated by the finger of the left hand or the finger of the right hand.

  Therefore, it is possible to perform the work of mounting the printing plate 71 on the plate cylinder 41a by one operator, and the workability can be improved by performing the quick plate replacement work.

  In the printing machine of the present invention, ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b for supplying ink, and plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b, and a plate clamping system 80.

  Therefore, it is possible to perform the work of mounting the printing plate 71 on the plate cylinder 41a by one operator, and the workability can be improved by performing the quick plate replacement work. Further, it is only necessary to provide the clamp switches 241, 242, 243, and 244 in addition to the existing plate clamping device 73 and the locking claw operating cylinder 79, so that a large-scale device is not required and the device is simplified and the manufacturing cost is reduced. be able to.

  In the present embodiment, a plurality of clamp switches 241, 242, 243, and 244 are provided on the operation panels 82 and 83, respectively, and fixed to the safety bars 101 and 103 and the mounting members 102 and 104. However, the present invention is limited to this configuration. It is not a thing. For example, the clamp switches 241, 242, 243, and 244 may be directly fixed to the safety bars 101 and 103 and the mounting members 102 and 104.

  In this embodiment, the operator shifts the thumb of the left hand or the right hand upward or downward while pressing the substantially entire area in the width direction at the tail edge side end portion 71b of the printing plate 71 with the left hand and the right hand. The clamp switches 241, 242, 243, and 244 are operated. However, the finger on which the operator operates the clamp switches 241, 242, 243, and 244 is not limited to the thumb, and may be an index finger or the like.

  Further, in the above-described embodiment, the various switches include a push-type switch such as a pushbutton switch or a touch panel, a contact-type switch such as a capacitance switch, a non-contact such as a proximity sensor or a photoelectric sensor. What is necessary is just to select suitably from a contact system switch etc. and to use.

  In the above-described embodiment, the clamp operation panels 82 and 83 and the attachment members 102 and 104 (or the safety bars 101 and 103) to which the clamp operation panels 82 and 83 are fixed are connected to the plate cylinders 41a, 41b, 42a, The position may be adjustable in a direction away from 42b. That is, the operability can be improved by moving the clamp operation panels 82 and 83 to a position where the operator can easily operate. Further, when the plate clamping operation is not performed, the contamination of the clamp operation panels 82 and 83 can be suppressed by separating them from the plate cylinders 41a, 41b, 42a, and 42b.

  In the above-described embodiment, the plate clamping device 73 is configured to be operated by the locking claw operating cylinder 79 as the locking claw operating device. However, the present invention is not limited to this configuration, and the locking claw operating device is a drive motor. And so on.

  In the above-described embodiment, the newspaper offset rotary printing press P is applied as the printing press. However, the printing press may be applied to a commercial offset rotary printing press or an offset sheet-fed printing press.

P Newspaper web offset press (printer)
R paper feeding device R1 to R7 paper feeding unit I infeed device I1 to I7 infeed unit U printing device U1 to U6, U11 to U62 printing unit D web pass device D1, D2 web pass unit F folding machine F1, F2 folding unit 21, 22, 23, 24 Stack 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b Blanket cylinder 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b Plate cylinder 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b Ink supply device 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b Dampening device 71, 71A, 71B, 71C, 71D Plate 71a Edge side 71b Edge side Edge 72 Gap 72a Cutter 72b Cutter butt 73 Plate clamping Device 74 tension bar 74a locking claw 77 compression coil spring 79 locking claw operating cylinder (locking claw operating device)
80 Plate clamping system 81, 81a, 81b Main operation panel 82, 82a, 82b, 83, 83a, 83b Clamp operation panel 84 Timer 85 Controller 93a, 93b Work table 94a, 94b Cover 101, 103 Safety bar 102, 104 Mounting member 201 Standard panel 202, 203 Auto clamp panel 211, 212 Stack selection switch 213 Plate cylinder forward rotation switch 214 Plate cylinder reverse switch 215 Plate cylinder fixed position stop switch 216 Stop / safety switch 221, 222, 223, 224, 231, 232, 233, 234 Surface selection switch 225, 226, 235, 236 Batch switch 227, 237 Plate removal switch 228, 238 Plate mounting switch 241, 242, 243, 244 Clamp switch 245, 246 Pump switch 247 Clamp position lamp 248 Plate position lamp 249, 250, 251, 252 Surface selection lamp A1, A2, A3, A4 Printing plate mounting area W, W1, W2 Web (printing medium)

Claims (18)

A plate clamping device for locking the printing plate by locking a locking claw to an end portion of the printing plate wound around the outer peripheral surface of the plate cylinder;
A locking claw actuating device for engaging and disengaging the locking claw with respect to an end of the printing plate;
A clamp switch for locking the locking claw to the end of the printing plate by operating the locking claw operating device;
In a plate clamping system comprising:
The clamp switch is arranged in an area where the operator's finger can reach while the operator's hand presses the end of the printing plate.
A plate clamping system characterized by that.   2. The plate clamping system according to claim 1, wherein the clamp switch is disposed at a central position in a width direction of the printing plate mounted on the plate cylinder. 3.   2. The plate clamping according to claim 1, wherein the clamp switch is disposed within 50 mm from a central position in the width direction of the printing plate mounted on the plate cylinder toward one or the other in the width direction. system.   The plate clamping system according to any one of claims 1 to 3, wherein the clamp switch is disposed so as to be positionally adjustable in an axial direction of the plate cylinder.   The plate clamping system according to any one of claims 1 to 4, wherein a shortest distance between the clamp switch and the outer peripheral surface of the plate cylinder is set to 100 mm or less.   When the rotation position of the plate cylinder stops at the plate clamping position, the clamp switch is disposed in an area where the operator's finger can reach with the operator's hand holding the end of the plate. The plate clamping system according to any one of claims 1 to 5, wherein the plate clamping system is characterized.   The plate clamping system according to claim 6, wherein the shortest distance between the clamp switch and the gap portion of the plate cylinder is set to 140 mm or less.   The plate clamping system according to claim 6, wherein the shortest distance between the clamp switch and the axial end portion of the gap portion of the plate cylinder corresponding to the plate mounting region is set to 300 mm or less.   The said clamp switch is arrange | positioned with respect to the gap part of the plate cylinder stopped in the said plate clamp position at the one side of the circumferential direction of the said plate cylinder, or the other side of the circumferential direction. The plate clamping system according to claim 8.   The mounting member is disposed along the axial direction of the plate cylinder adjacent to the contact position of the plate cylinder and the blanket cylinder, and the clamp switch is provided on the mounting member. The plate clamping system according to any one of 9.   The safety bar is disposed along the axial direction of the plate cylinder adjacent to the contact position of the plate cylinder and the blanket cylinder, and the clamp switch is provided on the safety bar. The plate clamping system according to any one of 10.   The plate cylinder is capable of mounting a plurality of printing plates along an axial direction, and the plate clamping device has a plurality of locking claws for individually restraining the plurality of printing plates, and the locking claws. The actuating device includes a plurality of actuating members that individually actuate the plurality of locking claws, and a plurality of the clamp switches are provided corresponding to the plurality of actuating members. Item 12. The plate clamping system according to any one of items 11 to 11.   The plate clamping system according to any one of claims 1 to 12, wherein the clamp switch is provided on a clamp operation panel fixed at a predetermined position.   The clamp operation panel is mounted with a clamp position lamp that lights when the plate cylinder stops at the plate clamping position, a plate hanging position lamp that lights when the plate cylinder stops at the plate hanging position, and a printing plate. The plate clamping system according to claim 13, further comprising a surface selection lamp that displays a surface position of the plate cylinder.   The main operation panel including an engagement / disengagement switch that operates the locking claw actuating device, a forward rotation switch that rotates the plate cylinder forward, and a reverse rotation switch that rotates the plate cylinder reversely is provided. The plate clamping system according to any one of claims 1 to 14.   16. The control device according to claim 1, further comprising a control device that operates the locking claw operating device after a predetermined time has elapsed when an operation command signal by operating the clamp switch is input. The plate clamping system according to one item. A plate clamping device for locking the printing plate by locking a locking claw to an end portion of the printing plate wound around the outer peripheral surface of the plate cylinder;
A locking claw actuating device for engaging and disengaging the locking claw with respect to an end of the printing plate;
A clamp switch for locking the locking claw to the end of the printing plate by operating the locking claw operating device;
In a plate clamping system comprising:
When one end is locked to the plate cylinder and the other end of the printing plate wound around the outer peripheral surface of the plate cylinder is locked to the plate cylinder,
The clamp switch is operated with the left finger or the right hand of the operator while the other end of the printing plate is pushed into the gap portion of the plate cylinder with the left and right hands of the operator.
A plate clamping method characterized by that. An ink supply device for supplying ink;
A plate cylinder from which ink is supplied to the printing plate mounted on the outer periphery from the ink supply device;
A blanket cylinder for transferring an image of ink received from the plate cylinder to a web;
The plate clamping system according to any one of claims 1 to 16,
A printing machine comprising:

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