JP6832079B2 - Plate tightening system and printing machine - Google Patents

Description

The present invention relates to a plate clamping system used for mounting a printing plate on a plate cylinder supported by a printing machine, and a printing machine provided with this plate clamping system.

For example, an offset rotary printing press for newspapers includes a paper feeding device, a printing device, a web path device, and a folding machine. Then, the printing device has a plurality of printing units, and each printing unit prints on the 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 the printing plates necessary for printing are attached to the plate cylinder to perform printing. Therefore, 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 forming a groove shape along the axial direction on the outer peripheral surface, and the plate tightening device is configured by providing a tension bar in this gap portion, and the rear end of the printing plate is provided by this tension bar. By pulling the part to apply tension to the printing plate, the printing plate is tightened and fixed to the plate cylinder.

When mounting the printing plate on the plate cylinder, the gripping side end of the printing plate is locked to the holding portion of the plate cylinder, the printing plate is rotated to wind the printing plate around the plate cylinder, and printing is performed by a plate tightening device. Lock the end of the plate on the side of the mouth of the plate to the end of the plate on the side of the mouth. At this time, one worker presses the outer peripheral surface of the gripping end side end of the printing plate, and the other worker operates the operation switch of the plate tightening device. Then, when the tension bar rotates and the locking claw moves to the release position, the gripping end side end of the printing plate held by the operator is pushed into the gap portion, and the tension bar rotates in the opposite direction. Then, the locking claw moves to the locking position, so that the end portion on the side of the buttock is locked to the locking claw, and the printing plate is tightened and fixed to the plate cylinder by the tension bar.

In this case, when the work of attaching the printing plate to the plate cylinder is performed, two workers are required, which hinders the rapid implementation of the plate replacement work in a situation where the number of people with a machine is limited. I was coming. Therefore, a technique for automatically performing plate replacement work has been proposed, and for example, there is one described in Patent Document 1 below.

Japanese Unexamined Patent Publication No. 2008-55794

In the semi-automatic plate changing device described in Patent Document 1 described above, the plate pressing roller is in a wearing state in which the printing plate is pressed against the plate cylinder, and the plate pressing roller pushes the holding end side end of the printing plate into the gap portion to automatically perform the printing plate. The tension bar is rotated and locked by the locking claws. In this semi-automatic plate exchange device, the operator only needs to input an operation command to the controller, and one operator can carry out the plate exchange work. However, there is a problem that a plurality of plate holding rollers, their driving devices, various sensors, and the like are required in the peripheral portion of the plate cylinder, which complicates the structure and increases the manufacturing cost.

The present invention solves the above-mentioned problems, and an object of the present invention is to provide a plate clamping system and a printing machine for improving workability, simplifying an apparatus, and reducing a manufacturing cost.

The plate tightening system of the present invention for achieving the above object includes a plate tightening device in which a locking claw is locked to an end portion of a printing plate wound around an outer peripheral surface of a plate cylinder to fasten the printing plate. When the locking claw operating device that engages and disengages the locking claw with respect to the end of the printing plate and the operation command signal of the locking claw operating device are input, the locking claw is after a predetermined time set in advance. It is characterized by including a control device for operating the operating device.

Therefore, when the operation command signal is input, the control device operates the locking claw operating device after a lapse of a predetermined time. Therefore, when the operator performs the plate mounting operation and the operation command signal is output, the control device secures a waiting time of a predetermined time from the input of the operation command signal, and the operator during this waiting time. In addition, the end portion of the printing plate wound around the outer peripheral surface of the plate cylinder can be pressed from the outside. Then, when a predetermined time elapses and the locking claw actuating device is activated, the locking claw is activated to lock the end portion of the printing plate, and the printing plate can be fastened to the outer peripheral surface of the plate cylinder. As a result, it becomes possible for one worker to carry out the work of attaching the printing plate to the plate cylinder, and the workability can be improved by carrying out the quick plate replacement work. Further, in addition to the existing plate tightening device and the locking claw actuating device, only the operation command signal input / output device is required, and a large-scale device can be eliminated to simplify the device and reduce the manufacturing cost.

In the plate tightening system of the present invention, an operation switch for operating the locking claw operation device is provided, and the control device receives the operation command signal output by the operation of the operation switch and after a lapse of a predetermined time. It is characterized in that the locking claw actuating device is actuated.

Therefore, the operation switch is operated to output an operation command signal, and when the operation command signal is input, the control device operates the locking claw operation device after a lapse of a predetermined time, so that the operator operates. The end of the printing plate wound around the outer peripheral surface of the plate cylinder can be pressed from the outside within a predetermined time from the input of the command signal, and one operator can attach the printing plate to the plate cylinder. It becomes possible to carry out, and workability can be improved.

In the plate tightening system of the present invention, the operation switch is a push button type switch that can be operated by an operator.

Therefore, the operator operates the push button type switch to output the operation command signal, and when the operation command signal is input, the control device operates the locking claw operation device after a lapse of a predetermined time. The operator can press the end of the printing plate wound around the outer peripheral surface of the plate cylinder from the outside within a predetermined time after operating the push button type switch, and attach the printing plate to the plate cylinder. The work can be carried out by one worker, and workability can be improved.

The plate tightening system of the present invention is characterized in that the push button type switch is arranged at substantially the same height as the plate cylinder and facing the operator.

Therefore, by arranging the push button type switch at almost the same height as the plate cylinder and facing the operator, the push button type switch can be operated using the operator's body, and the operability is improved. Can be done.

In the plate tightening system of the present invention, the push button type switch is a foot switch arranged on a floor where an operator performs plate tightening work.

Therefore, by using the pushbutton type switch as a foot switch arranged on the floor, the pushbutton type switch can be operated by the foot of the operator, and the operability can be improved.

The plate tightening system of the present invention is characterized in that a safety bar is arranged on the outer periphery of the plate cylinder in parallel with the plate cylinder, and the push button type switch is arranged on the safety bar.

Therefore, by arranging the push button type switch on the safety bar, the operator can press the end portion of the printing plate immediately after operating the push button type switch, and the operability can be improved.

In the plate tightening system of the present invention, the operation switch is a detection switch that detects the hand of an operator holding the printing plate wound around the outer peripheral surface of the plate cylinder.

Therefore, when the operator presses the end of the printing plate wound around the outer peripheral surface of the plate cylinder from the outside, the detection switch detects the operator's hand pressing the printing plate and outputs an operation command signal for control. When this operation command signal is input, the device activates the locking claw activator after a lapse of a predetermined time, so that the operator simply presses the end of the printing plate to automatically activate the locking claw activator. It becomes possible for one worker to carry out the work of attaching the printing plate to the plate cylinder, and the workability can be improved.

In the plate tightening system of the present invention, a motion sensor for detecting that the operator is on the floor where the plate clamping work is performed is provided, and in the control device, the motion sensor detects the operator and the operation is performed. When a command signal is input, the locking claw actuating device is activated after a lapse of a predetermined time.

Therefore, when the operation command signal is input after the motion sensor detects the operator, the control device activates the locking claw operating device after a lapse of a predetermined time, so that the operator clearly performs the plate mounting work. It can be confirmed and the safety can be improved.

In the plate tightening system of the present invention, a plurality of the printing plates can be mounted on the plate cylinder along the axial direction, and the plate tightening device can individually restrain the plurality of the printing plates with the locking claws. The locking claw actuating device is characterized in that the locking claws that restrain a plurality of the printing plates can be individually actuated.

Therefore, the locking claw actuating device can individually restrain a plurality of printing plates attached to the plate cylinder by each locking claw, and can improve workability.

Further, the printing press of the present invention has an ink supply device that supplies ink, a plate cylinder that supplies ink from the ink supply device to a printing plate mounted on the outer peripheral portion, and an image of ink received from the plate cylinder. It is characterized by comprising a blanket body for transferring the ink to the web and the plate tightening system.

Therefore, when the printing plate is mounted on the plate cylinder, if the worker performs the plate mounting operation and the operation command signal is output, a waiting time of a predetermined time is secured from the input of the operation command signal, and the worker During this 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. Then, when a predetermined time elapses and the locking claw actuating device is activated, the locking claw is activated to lock the end portion of the printing plate, and the printing plate can be fastened to the outer peripheral surface of the plate cylinder. As a result, it becomes possible for one worker to carry out the work of attaching the printing plate to the plate cylinder, and the workability can be improved by carrying out the quick plate replacement work. Further, in addition to the existing plate tightening device and the locking claw actuating device, only the operation command signal input / output device is required, and a large-scale device can be eliminated to simplify the device and reduce the manufacturing cost.

According to the plate tightening system and the printing machine of the present invention, when the operation command signal of the locking claw operating device is input, the locking claw operating device is activated after the elapse of a preset predetermined time, so that the plate changing work can be performed quickly. By implementing this, workability can be improved, and large-scale equipment can be eliminated to simplify the equipment and reduce the manufacturing cost.

FIG. 1 is a block configuration diagram showing a plate tightening system of the first embodiment. FIG. 2 is a front schematic view showing a printing unit to which a plate clamping system is applied. FIG. 3 is a schematic plan view showing the printing unit. FIG. 4 is a flowchart showing the plate tightening operation by the plate tightening system. FIG. 5-1 is a schematic view showing the phase matching work of the gap portion of the plate cylinder. FIG. 5-2 is a schematic view showing the plate hanging work on the plate cylinder. FIG. 5-3 is a schematic view showing the plate winding work on the plate cylinder. FIG. 5-4 is a schematic view showing the plate tightening work on the plate cylinder. FIG. 6 is a schematic configuration diagram showing an offset rotary printing press for newspapers. FIG. 7 is a schematic configuration diagram showing a printing unit in an offset rotary printing press for newspapers. FIG. 8 is a schematic view showing a plate clamping device. FIG. 9 is a schematic view showing the plate tightening operation by the plate tightening device. FIG. 10 is a schematic view showing a plate tightening operation by a plate tightening device. FIG. 11 is a block configuration diagram showing the plate tightening system of the second embodiment. FIG. 12 is a front schematic view showing a printing unit to which the plate clamping system is applied. FIG. 13 is a schematic plan view showing the printing unit. FIG. 14 is a block configuration diagram showing the plate tightening system of the third embodiment. FIG. 15 is a front schematic view showing a printing unit to which the plate clamping system is applied. FIG. 16 is a schematic plan view showing the printing unit. FIG. 17 is a block configuration diagram showing the plate tightening system of the fourth embodiment. FIG. 18 is a front schematic view showing a printing unit to which the plate clamping system is applied. FIG. 19 is a schematic plan view showing the printing unit. FIG. 20 is a block configuration diagram showing a plate tightening system according to a fifth embodiment. FIG. 21 is a front schematic view showing a printing unit to which the plate clamping system is applied. FIG. 22 is a schematic plan view showing the printing unit.

A preferred embodiment of the plate clamping system and the printing press according to the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to this embodiment, and when there are a plurality of embodiments, the present invention also includes a combination of the respective embodiments.

[First Embodiment]
FIG. 6 is a schematic configuration diagram showing a newspaper offset rotary printing press, and FIG. 7 is a schematic configuration diagram showing a printing unit in a newspaper offset rotary printing press.

In the first embodiment, as shown in FIG. 6, the printing machine P includes a paper feeding device R, an in-feed device I, a printing device U, a web path device D, and a folding machine F. .. The paper feeding device R has a plurality of (7 units in this embodiment) paper feeding units R1 to R7, and the in-feed device I has a plurality of (7 units in this embodiment) in-feed units I1 to I7. The printing device U has a plurality of (six units in the present embodiment) printing units U1 to U6, and the web path device D has a plurality of (two units in the present embodiment) web path units D1. , D2, and the folding machine F has a plurality of folding units F1 and F2 (two in this embodiment).

In this case, the printing units U1 to U6 have been described as six units, but each of the printing units U1 to U6 can print in four colors, and the printing units U11 and U12 can be divided into upper and lower parts to print in two colors. , U21 ... Can be used as U61, U62. Further, although the two folding units F1 and F2 are described side by side, they are actually an operation side folding unit F1 and a driving side folding unit F2 arranged side by side in a direction orthogonal to the paper surface. Further, although the printing device U is described from two parts, it is only described by dividing it into two in terms of function, and it is actually one device.

In the paper feed device R, the paper feed units R1 to R7 have substantially the same configuration, and have a holding arm for holding the three rolls of the web (printing medium) W wound in a roll shape. By rotating, the roll paper can be rotated to the paper feed position. Further, each of the paper feed units R1 to R7 is provided with a paper splicing device (not shown), and when the amount of the take-up paper unwound at the paper feed position is low, the paper splicing device causes the take-up paper at the paper feed position Then, the roll paper in the standby position can be spliced.

In the in-feed device I, the in-feed units I1 to I7 have substantially the same configuration, and the web traveling on the printing device U is driven by adjusting the tension of the web W sent to each printing unit U1 to U6 of the printing device U. The tension of W is stably maintained at an appropriate value. For example, each in-feed unit I1 to I7 has an in-feed roller, a paper presser rubber roller, a dancer roller, a guide roller, and the like. Then, the tension of the web W is adjusted appropriately by urging the dancer roller in the tension direction of the web W, and the peripheral speed of the in-feed roller is changed according to the swing of the dancer roller to maintain the proper tension of the web W. ing.

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

In the web pass device 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 almost the same configuration, and is a slitter for cutting the web W along the vertical direction (longitudinal direction of the web W, the transport direction of the web W) at the center in the width direction, and vertical cutting. It has a turn bar for setting the transport path of the web W, a compensator for adjusting the transport position of the web W in the longitudinal direction of the top and bottom, and the like.

That is, each web W printed by the printing units U1 to U3 is vertically cut by the web path unit D1 by the slitter, the transport path is changed by the turn bar, and the transport position is adjusted by the compensator. Are superimposed in the order of. Further, each web W printed by the printing units U4 to U6 is vertically cut by the web path unit D2 by the slitter, the transport path is changed by the turn bar, and the transport position is adjusted by the compensator, and then a predetermined value is set. They are overlaid 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 stacked and introduced from the web path unit D1, the folding unit F1 vertically folds the web W1, horizontally cuts it to a predetermined length, and horizontally folds it to form a fold. , Can be discharged as a newspaper. Further, when a plurality of webs W2 are stacked and introduced from the web path unit D2, the folding unit F2 vertically folds the web W2, horizontally cuts the web W2 to a predetermined length, and horizontally folds the web W2 to form a fold. , 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 almost the same configuration.

As shown in FIG. 7, the printing unit U1 is an H-shaped tower unit so that four-color printing is possible. In this printing unit U1, the transport direction of the web W is upward in the vertical direction, and from bottom to top, 4 for each of black (Black), indigo (Cyan), red (Magenta), and yellow (Yellow). Two stacks 21, 22, 23, 24 are arranged and configured. Each stack 21, 22, 23, 24 has a roller arrangement that is symmetrical to each other.

In each of the stacks 21, 22, 23, 24, the blanket bodies 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b are opposed to each other on the left and right, and can be brought into contact with each other across the transport path of the web W. The plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are in contact with the cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b. Then, each of the stacks 21, 22, 23, 24 has an ink supply device 51a, 51b, 52a, 52b, 53a, 53b, for each plate cylinder 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b. 54a and 54b are provided. Wetting devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b are provided for each of the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b.

In this case, in the stacks 21 and 23, the blanket cylinders 31a, 31b, 33a, 33b and the plate cylinders 41a, 41b, 43a, 43b are arranged in a V shape, and the stacks 22, 24 are the blanket cylinders 32a, 32b, 34a. , 34b and the plate cylinders 42a, 42b, 44a, 44b are arranged in an inverted C shape. Then, on 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, along the width direction of the web W. It can be installed side by side. Further, the left side is a front side printing unit that performs front side printing and the right side is a back side printing unit that performs back side printing with respect to the transport path of the web W along the vertical direction.

By the way, in each of the printing units U1 to U6, the printing plates are mounted on the outer peripheral portions of the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, and the printing plates are printed according to the printed matter. A plurality of printing plates are manufactured, and printing plates necessary for printing are attached to 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, but here, the plate clamping device mounted on the plate cylinder 41a of the stack 21 in the printing unit U1 will be described. FIG. 8 is a schematic view showing a plate tightening device, and FIGS. 9 and 10 are schematic views showing a plate tightening operation by the plate tightening device.

As shown in FIG. 8, the printing plate 71 is wound around the outer peripheral surface of the plate cylinder 41a having a cylindrical shape. In the plate cylinder 41a, a gap portion 72 having a groove shape along the axial direction is formed on the outer peripheral portion, and a grip portion 72a having an acute-angled edge portion is formed at one end of the gap portion 72 in the circumferential direction. A mouthpiece 72b with a sharp edge is formed at the end. On the other hand, in the printing plate 71, a gripping side end 71a having an acutely bent end is formed at one end in the longitudinal direction (circumferential direction of the plate cylinder 41a), and the other end is bent at an acute angle. An acute-angled end 71b is formed.

In the printing plate 71, the grip side end portion 71a penetrates into the gap portion 72 of the plate cylinder 41a and is in contact with the grip portion 72a to be locked. Further, in the printing plate 71, the grip portion 71b penetrates into the gap portion 72 of the plate cylinder 41a, comes into contact with the grip portion 72b, and is locked to the plate tightening device 73. The plate tightening device 73 has a tension bar 74 arranged 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 the locking claw 74a is formed so as to project from the outer peripheral portion, and the locking claw 74a engages with the gripping end side end portion 71b of the printing plate 71. It can be stopped. Further, the tension bar 74 has a lever 74b fixedly attached to the outer peripheral portion thereof.

The plate body 41a is provided with a spring support member 75 adjacent to the gap portion 72, and the 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 arranged around the guide shaft 76, and is stretched between the spring support member 75 and the head portion 76a of the guide shaft 76. The lever 74b of the tension bar 74 and the head 76a of the guide shaft 76 are rotatably connected by the connecting shaft 78. Therefore, in FIG. 8, the tension bar 74 is biased and supported in the clockwise direction, that is, in the direction in which the locking claw 74a is locked to the gripping end side end 71b of the printing plate 71.

Further, a locking claw operating cylinder (air cylinder) 79 is arranged adjacent to the plate tightening device 73 on the outer peripheral side of the plate cylinder 41a, and the locking claw operating cylinder 79 is pivoted by the locking claw operating rod 79a. It is possible to move in the direction. The locking claw actuating rod 79a is arranged at a position facing the guide shaft 76 (head 76a) of the plate tightening device 73.

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

The plate tightening device 73 has a tension bar 74 biased and supported by the compression coil spring 77, and the locking claw 74a is locked to the gripping end side end 71b of the printing plate 71, whereby the printing plate is printed. 71 is restrained on the outer peripheral surface of the plate cylinder 41a. Therefore, when the printing plate 71 is removed 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 in the counterclockwise direction in FIG. 8 via the above. Then, the locking claw 74a is separated from the grip portion 71b of the printing plate 71, so that the restraint of the grip end side end 71b is released, and the grip tail side end 71b is released from the gap portion 72. The plate body 41a can be taken out to the outside, and the printing plate 71 can be removed from the plate body 41a by rotating the plate body 41a.

On the other hand, when the printing plate 71 is attached to the plate cylinder 41a, as shown in FIG. 9, the grip side end portion 71a of the printing plate 71 is locked to the grip portion 72a of the plate cylinder 41a, and the plate cylinder 41a is In FIG. 9, the printing plate 71 is wound around the plate cylinder 41a by rotating in the counterclockwise direction, and the buttock side end portion 71b is positioned outside the gap portion 72. Then, the operator manually presses the outer peripheral surface of the gripping end side end portion 71b of the printing plate 71, and the locking claw operating rod 79a is extended by the locking claw operating cylinder 79. Then, the locking claw operating rod 79a presses the guide shaft 76 to rotate the tension bar 74 in the counterclockwise direction in FIG. 9, and the locking claw 74a moves to the release position. Here, as shown in FIG. 10, when the operator manually pushes the grip end side end portion 71b of the printing plate 71, the grip end side end portion 71b penetrates into the gap portion 72. Here, when the locking claw operating rod 79a is contracted by the locking claw operating cylinder 79, the locking claw operating rod 79a is separated from the guide shaft 76, and the tension bar 74 is displaced by the urging force of the compression coil spring 77. The locking claw 74a is locked to the gripping end side end 71b of the printing plate 71 by rotating clockwise, and the printing plate 71 is restrained on the outer peripheral surface of the plate cylinder 41a.

The plate tightening system of the first embodiment enables one worker to carry out the work of attaching the printing plate 71 to the plate cylinder 41a. FIG. 1 is a block configuration diagram showing the plate clamping system of the first embodiment, FIG. 2 is a front schematic view showing a printing unit to which the plate clamping system is applied, and FIG. 3 is a plan schematic view showing a printing unit. ..

In the first embodiment, as shown in FIGS. 1 to 3, in the plate tightening system 80, the plate tightening system 80 is provided on the end portion of the printing plate 71 in which the locking claw 74a is wound around the outer peripheral surfaces of the plate cylinders 41a, 41b, 42a, 42b. A plate tightening device 73 that locks and fastens the printing plate 71, and a locking claw operating cylinder 79 as a locking claw operating device that engages and disengages the locking claw 74a with respect to the end of the printing plate 71. It includes a control device 81 that operates the locking claw operating cylinder 79 after a predetermined time has elapsed when a preset operation command signal of the claw operating cylinder 79 is input.

Further, the plate tightening system 80 detects the hand of an operator who presses the printing plate 71 wound around the outer peripheral surfaces of the plate cylinders 41a, 41b, 42a, 42b as an operation switch for operating the locking claw operating cylinder 79. A detection switch 82 is provided. Therefore, when the detection switch 82 detects the hand of the operator holding the printing plate 71, the control device 81 outputs an operation command signal from the detection switch 82, and the control device 81 receives the operation command signal for a predetermined time. After the lapse of time, the locking claw operating cylinder 79 is operated. A timer 83 is connected to the control device 81, and a predetermined time is measured by the timer 83. The predetermined time can be appropriately adjusted according to the operating mode of the plate tightening device 73 and the locking claw operating cylinder 79.

By the way, as shown in FIGS. 5-1 and 5-4, the plate cylinders 41a (41b, 42a, 42b) are provided with gap portions 72 along the axial direction on the outer peripheral portion, and four plates are provided along the axial direction. The printing plate mounting areas A1, A2, A3, and A4 are secured. The plate cylinder 41a can mount the printing plates 71A, 71B, 71C, and 71D in the printing plate mounting areas A1, A2, A3, and A4. On the other hand, in the plate tightening device 73, the locking claws 74a can individually lock (constrain) the printing plates 71A, 71B, 71C, 71D, and the locking claw operating cylinder 79 is the printing plates 71A, 71B, respectively. The locking claws 74a that lock the 71C and 71D can be operated individually.

As shown in FIGS. 2 and 3, the printing press frames 91 and 92 are erected on the left and right sides of the stacks 21 and 22, and the blanket cylinder 31a is placed on the lower side in the space between the printing press frames 91 and 92. , 31b and plate cylinders 41a, 41b are arranged, blanket cylinders 32a, 32b and plate cylinders 42a, 42b are arranged on the upper stage side, and the blanket cylinders 31a, 31b, 32a, 32b and plate cylinders 41a, 41b, 42a, 42b are arranged. Is rotatably supported by the printing press frames 91 and 92. In addition, workbenches 93a and 93b are arranged on the worker side between the printing press frames 91 and 92 on the left and right, and work floors 94a and 94b on which the worker performs plate mounting work on the front side of the workbenches 93a and 93b. Is provided.

As described above, since the plate cylinders 41a, 41b, 42a, and 42b have four printing plate mounting areas A1, A2, A3, and A4, the operator can perform the printing plate mounting areas A1, A2. , A3 and A4 are used to attach the printing plate 71. Therefore, the detection switches 82 (82Aa, 82Ba, 82Ca, 82Da, 82Ab, 82Bb, 82Cb, 82Db) are arranged in the printing plate mounting areas A1, A2, A3, and A4 corresponding to the plate cylinders 41a, 41b, 42a, and 42b. Has been done. Further, plate cylinder selection switches 84 (84a, 84b) are provided on the work space side of the workbenches 93a and 93b. The plate cylinder selection switch 84 (84a, 84b) selects the plate cylinders 41a, 41b, 42a, 42b for plate exchange from the plate cylinders 41a, 41b of the stack 21 and the plate cylinders 42a, 42b of the stack 22. It is a thing.

Here, the plate tightening operation by the plate tightening system 80 of the present embodiment will be described in detail.

FIG. 4 is a flowchart showing the plate tightening work by the plate tightening system, FIG. 5-1 is a schematic view showing the phase matching work of the gap portion of the plate cylinder, and FIG. 5-2 shows the plate hanging work on the plate cylinder. A schematic view, FIG. 5-3 is a schematic view showing a plate winding operation on a plate cylinder, and FIG. 5-4 is a schematic view showing a plate tightening operation on a plate cylinder.

In the plate tightening work of the printing plate 71 on the plate cylinder 41a, as shown in FIGS. 4 and 5-1 in step S11, the plate cylinder 41a is rotated to perform phase adjustment of the gap portion 72, and the gap portion 72 is phased out. The 72 is positioned at a predetermined position, that is, a position where the operator can insert the holding side end portion 71a of the printing plate 71 into the gap portion 72. As shown in FIGS. 4 and 5-2, in step S12, the operator sets the grip side end 71Aa of the corresponding printing plate 71A to the gap portion 72 with respect to the printing plate mounting area A1 in the plate cylinder 41a. Perform the plate hanging work to lock to. Subsequently, the operator similarly makes a gap portion between the holding side ends of the corresponding printing plates 71B, 71C, and 71D for the remaining printing plate mounting areas A2, A3, and A4 in the plate cylinder 41a. A plate hanging operation for locking to 72 is carried out.

Then, as shown in FIGS. 4 and 5-3, in step S13, the plate cylinder 41a is rotated once, and the printing plates 71A, 71B, 71C, and 71D are wound around the outer peripheral surface of the plate cylinder 41a. Here, the printing plates 71A, 71B, 71C, and 71D are wound around the plate cylinder 41a, but the gripping end side ends 71Ab, 71Bb, 71Cb, and 71Db are not inserted into the gap portion 72. As shown in FIGS. 4 and 5-4, in step S14, the operator first presses the gripping tail side end portion 71Ab on the outer peripheral surface of the printing plate 71A. Then, as shown in FIGS. 3 and 4, the detection switch 82Aa can detect the hand of the operator holding the outer peripheral surface of the printing plate 71A.

When the detection switch 82Aa detects the operator's hand (Yes) in step S15, the timer 83 starts operating in step S16. In this case, for example, when the detection switch 82Aa detects the worker's hand, the lamp is turned on, and when the detection switch 82Aa continuously detects the worker's hand for a predetermined time, the operation of the timer 83 is started. It is desirable to configure in. If the detection switch 82Aa does not detect the operator's hand (No) in step S15, the operation of the timer 83 is not started. In step S17, it is determined whether or not a predetermined time has elapsed since the detection switch 82Aa detected the operator's hand.

Here, if the detection switch 82Aa detects the worker's hand and the predetermined time does not elapse (No), the process of step S16 is continued, and the detection switch 82Aa detects the worker's hand and the predetermined time elapses. (Yes), in step S18, the plate tightening device 73 inserts and locks the gripping tail side end portion 71Ab of the printing plate 71A into the gap portion 72, and plate clamping is performed. That is, as shown in FIG. 9, the locking claw operating rod 79a is pressed by the locking claw operating cylinder 79 while the operator manually presses the gripping tail side end portion 71b on the outer peripheral surface of the printing plate 71 from the outside. When the locking claw operating rod 79a presses the guide shaft 76, the tension bar 74 is rotated to move the locking claw 74a to the release position. Then, the gripping tail side end portion 71b of the printing plate 71 is pushed into the gap portion 72 by the operator's hand, and then the locking claw actuating rod 79a contracts due to the locking claw actuating cylinder 79. The locking claw operating rod 79a is separated from the guide shaft 76, the tension bar 74 is rotated by the urging force of the compression coil spring 77, and the locking claw 74a is locked to the gripping end side end 71b of the printing plate 71A. .. Therefore, the printing plate 71 is mounted on the outer peripheral surface of the plate cylinder 41a by the plate tightening device 73.

When the mounting work of the printing plate 71A on the plate cylinder 41a is completed, the mounting work of the printing plates 71B, 71C, 71D on the plate cylinder 41a is carried out in order by the same method. When all the printing plates 71A, 71B, 71C, and 71D are mounted on the plate cylinder 41a, the plate tightening work of the plate cylinder 41a is completed in step S19.

As described above, in the plate tightening system of the first embodiment, the locking claw 74a is locked to the end of the printing plate 71 wound around the outer peripheral surface of the plate cylinder 41a (41b, 42a, 42b) for printing. When the plate tightening device 73 for fastening the plate 71, the locking claw operating cylinder 79 for engaging and disengaging the locking claw 74a with respect to the end of the printing plate 71, and the operation command signal for the locking claw operating cylinder 79 are input in advance. A control device 81 for operating the locking claw operating cylinder 79 after a lapse of a set predetermined time is provided.

Therefore, when the operation command signal is input, the control device 81 operates the locking claw operation cylinder 79 after a lapse of a predetermined time. Therefore, when the operator performs the plate mounting operation and the operation command signal is output, the control device 81 secures a waiting time of a predetermined time from the input of the operation command signal, and the operator has to wait for this waiting time. In the meantime, the end portion of the printing plate 71 wound around the outer peripheral surface of the plate cylinder 41a can be pressed from the outside. Then, when a predetermined time elapses and the locking claw actuating cylinder 79 is activated, the locking claw 74a is activated to lock the printing plate 71 to the gripping end side end 71b of the printing plate 71, and the printing plate 71 is locked to the plate cylinder 41a. It can be fastened to the outer peripheral surface. As a result, the work of attaching the printing plate 71 to the plate cylinder 41a can be carried out by one worker, and the workability can be improved by carrying out the quick plate replacement work. Further, in addition to the existing plate tightening device 73 and the locking claw operation cylinder 79, only the operation command signal input / output device is required, and a large-scale device is not required, so that the device can be simplified and the manufacturing cost can be reduced.

In the plate tightening system of the first embodiment, as an operation switch for operating the locking claw operation cylinder 79, a detection switch 82 for detecting a worker's hand pressing the gripping end side end 71b of the printing plate 71 is provided and controlled. When the operation command signal output from the detection switch 82 is input, the device 81 operates the locking claw operation cylinder 79 after a lapse of a predetermined time. Therefore, when the operator presses the gripping end side end 71b of the printing plate 71, the detection switch 82 detects the operator's hand pressing the printing plate 71 and outputs an operation command signal, and the control device 81 outputs the operation command signal. When this operation command signal is input, the locking claw operating cylinder 79 is operated after a lapse of a predetermined time, so that the operator can operate the locking claw simply by pressing the gripping end side end 71b of the printing plate 71. The cylinder 79 automatically operates, and the work of attaching the printing plate 71 to the plate cylinder 41a can be performed by one worker, and workability can be improved.

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

Therefore, when the printing plate 71 is mounted on the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, when the operator performs the plate mounting operation and the operation command signal is output, the operation command signal is transmitted. A waiting time of a predetermined time is secured from the input, and the operator can use the end portion of the printing plate 71 wound around the outer peripheral surfaces of the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b during this waiting time. Can be pressed from the outside. As a result, it becomes possible for one worker to attach the printing plate 71 to the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, and to carry out a rapid plate replacement work. As a result, workability can be improved. Further, in addition to the existing plate tightening device 73 and the locking claw operation cylinder 79, only the operation command signal input / output device is required, and a large-scale device is not required, so that the device can be simplified and the manufacturing cost can be reduced.

[Second Embodiment]
11 is a block configuration diagram showing the plate clamping system of the second embodiment, FIG. 12 is a front schematic view showing a printing unit to which the plate clamping system is applied, and FIG. 13 is a plan schematic view showing a printing unit. .. Members having the same functions as those in the above-described embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the second embodiment, as shown in FIGS. 11 to 13, in the plate tightening system 80, the plate tightening system 80 is provided on the end portion of the printing plate 71 in which the locking claw 74a is wound around the outer peripheral surfaces of the plate cylinders 41a, 41b, 42a, 42b. A plate tightening device 73 that locks and fastens the printing plate 71, and a locking claw operating cylinder 79 as a locking claw operating device that engages and disengages the locking claw 74a with respect to the end of the printing plate 71. It includes a control device 81 that operates the locking claw operating cylinder 79 after a predetermined time has elapsed when a preset operation command signal of the claw operating cylinder 79 is input.

Further, the plate tightening system 80 detects the hand of an operator who presses the printing plate 71 wound around the outer peripheral surfaces of the plate cylinders 41a, 41b, 42a, 42b as an operation switch for operating the locking claw operating cylinder 79. A detection switch 82 is provided. Further, the plate tightening system 80 is provided with a motion sensor 85 that detects that the operator is on the work floors 94a and 94b where the plate tightening work is performed. Therefore, when the motion sensor 85 detects the operator and the detection switch 82 detects the operator's hand holding the printing plate 71 wound around the plate cylinders 41a, 41b, 42a, 42b, the control device 81 determines. When the second operation command signal is output from the motion sensor 85, the first operation command signal is output from the detection switch 82, and each of these operation command signals is input, the control device 81 locks the claws after a lapse of a predetermined time. The actuating cylinder 79 is actuated.

In the stacks 21 and 22, detection switches 82Aa, 82Ba, 82Ca, 82Da, 82Ab, 82Bb, 82Cb, 82Db are provided in the printing plate mounting areas A1, A2, A3, and A4 corresponding to the plate cylinders 41a, 41b, 42a, and 42b. Have been placed. Further, a motion sensor 85a is provided above the work floor 94a facing the plate cylinders 41a and 42a, and a motion sensor 85b is provided above the work floor 94b facing the plate cylinders 41b and 42b. The positions of the motion sensors 85a and 85b are not limited to above the work floors 94a and 94b, but are the sides of the work floors 94a and 94b (human sensor mats), the work floors 94a and 94b, and the front of the work floors 94a and 94b. Alternatively, it may be provided at the rear. Further, the motion sensors 85a and 85b may be ultrasonic sensors, infrared sensors, photoelectric sensors and the like.

Here, the plate tightening operation by the plate tightening system 80 of the present embodiment will be described in detail.

When the worker is located on the work floor 94a in front of the workbench 93a, the motion sensor 85a detects the worker. The operator rotates the plate cylinder 41a to perform phase adjustment of the gap portion 72, and the corresponding printing plates 71A, 71B, 71C are provided for the printing plate mounting areas A1, A2, A3, and A4 in the plate cylinder 41a. , The plate-hanging operation of locking the gripping side end of 71D to the gap portion 72 is performed. Then, the plate cylinder 41a is rotated once, and the printing plates 71A, 71B, 71C, and 71D are wound around the outer peripheral surface of the plate cylinder 41a. Here, the operator presses the holding end side end portion 71Ab on the outer peripheral surface of the printing plate 71A. Then, the detection switch 82Aa detects the hand of the operator holding the outer peripheral surface of the printing plate 71A.

That is, when the motion sensor 85a detects the operator and the detection switch 82Aa detects the operator's hand holding the printing plate 71 wound around the plate cylinder 41a, the timer 83 starts operating. Then, when the detection switch 82Aa detects the operator's hand and a predetermined time elapses, the plate tightening device 73 inserts the gripping end portion 71Ab of the printing plate 71A into the gap portion 72 and engages with the locking claw 74a. It will be stopped. Similarly, the printing plates 71B, 71C, and 71D are attached to the plate cylinder 41a in order.

As described above, in the plate tightening system of the second embodiment, the detection switch 82 for detecting the hand of the operator holding the printing plate 71 wound around the outer peripheral surfaces of the plate cylinders 41a, 41b, 42a, 42b and the operation. A motion sensor 85 (85a, 85b) for detecting that a person is on the work floors 94a, 94b where the plate tightening work is performed is provided, and the control device 81 is provided with the motion sensor 85a, 85b for the work of the work floors 94a, 94b. When a person is detected and the detection switch 82Aa detects a worker's hand holding the printing plate 71 wound around the plate cylinders 41a, 41b, 42a, 42b, the locking claw operating cylinder 79 is operated after a lapse of a predetermined time. Let me.

Therefore, when the operation command signal is input after the motion sensors 85a and 85b detect the operator, the control device 81 operates the locking claw operating cylinder 79 after a lapse of a predetermined time, so that the operator mounts the plate. The implementation of the work can be clearly confirmed and the safety can be improved.

[Third Embodiment]
14 is a block configuration diagram showing the plate clamping system of the third embodiment, FIG. 15 is a front schematic view showing a printing unit to which the plate clamping system is applied, and FIG. 16 is a plan schematic view showing a printing unit. .. Members having the same functions as those in the above-described embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the third embodiment, as shown in FIGS. 14 to 16, in the plate tightening system 80, the plate tightening system 80 is provided on the end portion of the printing plate 71 in which the locking claw 74a is wound around the outer peripheral surfaces of the plate cylinders 41a, 41b, 42a, 42b. A plate tightening device 73 that locks and fastens the printing plate 71, and a locking claw operating cylinder 79 as a locking claw operating device that engages and disengages the locking claw 74a with respect to the end of the printing plate 71. It includes a control device 81 that operates the locking claw operating cylinder 79 after a predetermined time has elapsed when a preset operation command signal of the claw operating cylinder 79 is input.

Further, the plate tightening system 80 is provided with a push button type belly switch 86 that can be operated by an operator as an operation switch for operating the locking claw operation cylinder 79. The push-button belly switch 86 can be pushed by the operator not only with the hand but also with the body such as the belly. Therefore, when the push button type belly switch 86 is operated by the operator, the control device 81 outputs an operation command signal, and when the operation command signal is input, the control device 81 locks the claw after a lapse of a predetermined time. The actuating cylinder 79 is actuated.

In the stacks 21 and 22, push-button belly switches 86Aa, 86Ba, 86Ca, 86Da, 86Ab, 86Bb, 86Cb are placed in the printing plate mounting areas A1, A2, A3, and A4 corresponding to the plate cylinders 41a, 41b, 42a, and 42b. , 86Db are arranged. The push-button belly switches 86Aa, 86Ba, 86Ca, 86Da, 86Ab, 86Bb, 86Cb, 86Db are arranged on the wall surface of the workbench 93a, 93b facing the operator at almost the same height as the plate cylinders 41a, 41b. ing.

Here, the plate tightening operation by the plate tightening system 80 of the present embodiment will be described in detail.

The operator rotates the plate cylinder 41a to perform phase adjustment of the gap portion 72, and the corresponding printing plates 71A, 71B, 71C are provided for the printing plate mounting areas A1, A2, A3, and A4 in the plate cylinder 41a. , The plate-hanging operation of locking the gripping side end of 71D to the gap portion 72 is performed. Then, the plate cylinder 41a is rotated once, and the printing plates 71A, 71B, 71C, and 71D are wound around the outer peripheral surface of the plate cylinder 41a. Here, after operating the push button type belly switch 86Aa, the operator presses the gripping tail side end portion 71Ab on the outer peripheral surface of the printing plate 71A.

When the operator operates the push-button belly switch 86Aa, the timer 83 starts operating. Then, when the operator operates the push-button type belly switch 86Aa and a predetermined time elapses, the plate tightening device 73 inserts the gripping tail side end portion 71Ab of the printing plate 71A into the gap portion 72 and the locking claw 74a inserts it. It is locked. Similarly, the printing plates 71B, 71C, and 71D are attached to the plate cylinder 41a in order.

As described above, in the plate tightening system of the third embodiment, the push button type belly switch 86Aa, 86Ba, 86Ca, 86Da, 86Ab, which can be operated by the operator as the operation switch for operating the locking claw operation cylinder 79, 86Bb, 86Cb, 86Db are provided, and the control device 81 provides a locking claw operating cylinder after a lapse of a predetermined time when each push button type belly switch 86Aa, 86Ba, 86Ca, 86Da, 86Ab, 86Bb, 86Cb, 86Db is operated. Actuate 79.

Therefore, when the operator operates the push-button type belly switches 86Aa, 86Ba, 86Ca, 86Da, 86Ab, 86Bb, 86Cb, 86Db to output the operation command signal, and the control device 81 receives the operation command signal. Since the locking claw actuating cylinder 79 is operated after a lapse of a predetermined time, the operator operates the push button type belly switches 86Aa, 86Ba, 86Ca, 86Da, 86Ab, 86Bb, 86Cb, 86Db for a predetermined time. In the meantime, the gripping tail side end 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, and the plate cylinders 41a, 41b, 42a, 42b can be pressed. The mounting work of the printing plate 71 can be performed by one worker, and the workability can be improved.

In the plate tightening system of the third embodiment, the push button type belly switches 86Aa, 86Ba, 86Ca, 86Da, 86Ab, 86Bb, 86Cb, 86Db are provided to the operator at almost the same height as the plate cylinders 41a, 41b, 42a, 42b. They are placed facing each other. Therefore, the push-button type belly switches 86Aa, 86Ba, 86Ca, 86Da, 86Ab, 86Bb, 86Cb, and 86Db can be operated by using the body such as the worker's belly, and the operability can be improved.

[Fourth Embodiment]
FIG. 17 is a block configuration diagram showing the plate clamping system of the fourth embodiment, FIG. 18 is a front schematic view showing a printing unit to which the plate clamping system is applied, and FIG. 19 is a plan schematic view showing a printing unit. .. Members having the same functions as those in the above-described embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the fourth embodiment, as shown in FIGS. 17 to 19, in the plate tightening system 80, the plate tightening system 80 is provided on the end portion of the printing plate 71 in which the locking claw 74a is wound around the outer peripheral surfaces of the plate cylinders 41a, 41b, 42a, 42b. A plate tightening device 73 that locks and fastens the printing plate 71, and a locking claw operating cylinder 79 as a locking claw operating device that engages and disengages the locking claw 74a with respect to the end of the printing plate 71. It includes a control device 81 that operates the locking claw operating cylinder 79 after a predetermined time has elapsed when a preset operation command signal of the claw operating cylinder 79 is input.

Further, the plate tightening system 80 is provided with a push button type foot switch 87 that can be operated by an operator as an operation switch for operating the locking claw operation cylinder 79. The push button type foot switch 87 can be pushed by an operator with his / her foot. Therefore, when the push button type foot switch 87 is operated by the operator, the control device 81 outputs an operation command signal, and when the operation command signal is input, the control device 81 locks the claw after a lapse of a predetermined time. The actuating cylinder 79 is actuated.

In the stacks 21 and 22, push-button foot switches 87Aa, 87Ba, 87Ca, 87Da, 87Ab, 87Bb, 87Cb are placed in the printing plate mounting areas A1, A2, A3, and A4 corresponding to the plate cylinders 41a, 41b, 42a, and 42b. , 87Db are arranged. Each push-button foot switch 87Aa, 87Ba, 87Ca, 87Da, 87Ab, 87Bb, 87Cb, 87Db is arranged on the work floors 94a, 94b where the operator performs plate tightening work, and is stepped on by the operator's foot. It can be operated with.

Here, the plate tightening operation by the plate tightening system 80 of the present embodiment will be described in detail.

The operator rotates the plate cylinder 41a to perform phase adjustment of the gap portion 72, and the corresponding printing plates 71A, 71B, 71C are provided for the printing plate mounting areas A1, A2, A3, and A4 in the plate cylinder 41a. , The plate-hanging operation of locking the gripping side end of 71D to the gap portion 72 is performed. Then, the plate cylinder 41a is rotated once, and the printing plates 71A, 71B, 71C, and 71D are wound around the outer peripheral surface of the plate cylinder 41a. Here, after operating the push button type foot switch 87Aa, the operator presses the grip end side end 71Ab on the outer peripheral surface of the printing plate 71A.

When the operator operates the push button type foot switch 87Aa, the timer 83 starts operating. Then, when the operator operates the push button type foot switch 87Aa and a predetermined time elapses, the plate tightening device 73 inserts the gripping end side end 71Ab of the printing plate 71A into the gap portion 72 and the locking claw 74a inserts the end portion 71Ab. It is locked. Similarly, the printing plates 71B, 71C, and 71D are attached to the plate cylinder 41a in order.

As described above, in the plate tightening system of the fourth embodiment, the push button type foots arranged on the work floors 94a and 94b where the operator performs the plate tightening work as the operation switch for operating the locking claw operation cylinder 79. Switches 87Aa, 87Ba, 87Ca, 87Da, 87Ab, 87Bb, 87Cb, 87Db are provided, and the control device 81 is operated when each push button type foot switch 87Aa, 87Ba, 87Ca, 87Da, 87Ab, 87Bb, 87Cb, 87Db is operated. After a lapse of a predetermined time, the locking claw operating cylinder 79 is operated.

Therefore, the pushbutton type foot switches 87Aa, 87Ba, 87Ca, 87Da, 87Ab, 87Bb, 87Cb, 87Db arranged on the work floors 94a, 94b can be operated by the operator's feet, and the operability can be improved. it can.

[Fifth Embodiment]
FIG. 20 is a block configuration diagram showing the plate clamping system of the fifth embodiment, FIG. 21 is a front schematic view showing a printing unit to which the plate clamping system is applied, and FIG. 22 is a plan schematic view showing a printing unit. .. Members having the same functions as those in the above-described embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In a fifth embodiment, as shown in FIGS. 20 to 22, in the plate tightening system 80, the plate tightening system 80 is provided on the end portion of the printing plate 71 in which the locking claw 74a is wound around the outer peripheral surfaces of the plate cylinders 41a, 41b, 42a, 42b. A plate tightening device 73 that locks and fastens the printing plate 71, and a locking claw operating cylinder 79 as a locking claw operating device that engages and disengages the locking claw 74a with respect to the end of the printing plate 71. It includes a control device 81 that operates the locking claw operating cylinder 79 after a predetermined time has elapsed when a preset operation command signal of the claw operating cylinder 79 is input.

Further, the plate tightening system 80 is parallel to the plate cylinders 41a, 41b, 42a, 42b around the outer periphery of the plate cylinders 41a, 41b, 42a, 42b as an operation switch for operating the locking claw operation cylinder 79. Push-button switches 88 are provided on the arranged safety bars 95a, 95b, 96a, 96b. The push button type switch 88 can be manually pushed by an operator. Therefore, when the push button type switch 88 is operated by the operator, the control device 81 outputs an operation command signal, and when the operation command signal is input, the control device 81 operates the locking claw after a lapse of a predetermined time. Operate the cylinder 79.

In the stack 21, safety bars 95a and 95b are provided between the blanket cylinders 31a and 31b and the plate cylinders 41a and 41b to prevent the operator's hand from being pinched, and the safety bars 95a and 95b are provided at each end. Is fixed to the printing press frames 91 and 92. Further, in the stack 22, safety bars 96a and 96b are provided between the blanket cylinders 32a and 32b and the plate cylinders 42a and 42b to prevent the operator's hand from being pinched, and the safety bars 96a and 96b are provided. , Each end is fixed to the printing press frames 91 and 92. The safety bars 95a, 95b, 96a, 96b are pushbutton switches 88Aa, 88Ba corresponding to the printing plate mounting areas A1, A2, A3, A4 corresponding to the blanket cylinders 31a, 31b, 32a, 32b. , 88Ca, 88Da, 88Ab, 88Bb, 88Cb, 88Db are arranged. Therefore, the pushbutton switches 88Aa, 88Ba, 88Ca, 88Da, 88Ab, 88Bb, 88Cb, 88Db are the safety bars 95a, 95b facing the operator in the printing plate mounting areas A1, A2, A3, A4. It is placed in and can be operated by the operator.

Here, the plate tightening operation by the plate tightening system 80 of the present embodiment will be described in detail.

The operator rotates the plate cylinder 41a to perform phase adjustment of the gap portion 72, and the corresponding printing plates 71A, 71B, 71C are provided for the printing plate mounting areas A1, A2, A3, and A4 in the plate cylinder 41a. , The plate-hanging operation of locking the gripping side end of 71D to the gap portion 72 is performed. Then, the plate cylinder 41a is rotated once, and the printing plates 71A, 71B, 71C, and 71D are wound around the outer peripheral surface of the plate cylinder 41a. Here, after operating the push button type switch 88Aa, the operator presses the gripping end side end portion 71Ab on the outer peripheral surface of the printing plate 71A.

When the operator operates the push-button switch 88Aa, the timer 83 starts operating. Then, when the operator operates the push button type switch 88Aa and a predetermined time elapses, the plate tightening device 73 inserts the gripping tail side end portion 71Ab of the printing plate 71A into the gap portion 72 and engages with the locking claw 74a. It will be stopped. Similarly, the printing plates 71B, 71C, and 71D are attached to the plate cylinder 41a in order.

As described above, in the plate tightening system of the fifth embodiment, the safety bars 95a, 95b, 96a, 96b are located between the blanket cylinders 31a, 31b, 32a, 32b and the plate cylinders 41a, 41b, 42a, 42b. The safety bars 95a, 95b, 96a, 96b are provided with pushbutton switches 88Aa, 88Ba, 88Ca, 88Da, 88Ab, 88Bb, 88Cb, 88Db as operation switches for operating the locking claw operation cylinder 79, and are controlled. When the pushbutton switches 88Aa, 88Ba, 88Ca, 88Da, 88Ab, 88Bb, 88Cb, 88Db are operated, the device 81 operates the locking claw operating cylinder 79 after a lapse of a predetermined time.

Therefore, by providing the pushbutton switches 88Aa, 88Ba, 88Ca, 88Da, 88Ab, 88Bb, 88Cb, 88Db on the safety bars 95a, 95b, 96a, 96b, the operator can perform the pushbutton switches 88Aa, 88Ba, 88Ca, Immediately after operating 88Da, 88Ab, 88Bb, 88Cb, 88Db, the gripping end side end 71b of the printing plate 71 can be pressed, and the operability can be improved.

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

Further, in the above-described embodiment, the pushbutton type belly switch 86, the pushbutton type foot switch 87, and the pushbutton type switch 88 are provided as the pushbutton type belly switch, but the present invention is not limited to this configuration, for example. , One or both side surfaces of the drive side and the operation side of the printing press frames 91 and 92 may be provided with push button switches that can be operated by an operator. Further, the push button type switch may be a sheet key or a touch panel.

Further, in the above-described embodiment, the offset rotary printing press P for newspapers is applied as the printing press, but it may be applied to a commercial offset rotary printing press, an offset sheet-fed printing press, or the like.

P Newspaper offset rotary printing machine (printing machine)
R paper feed device R1 to R7 paper feed unit I infeed device I1 to I7 infeed unit U printing device U1 to U6, U11 to U62 printing unit D webpass device D1, D2 webpass unit F folding machine F1, F2 folding unit 21,22,23,24 Stacks 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b Blanket cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b Plate cylinders 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b Ink supply device 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b Wetting device 71, 71A, 71B, 71C, 71D Printing plate 71a Holding side end 71b Holding end side End 72 Gap 72a Grip 72b Grip 73 Plate tightening device 74 Tension bar 74a Locking claw 77 Compression coil spring 79 Locking claw operating cylinder (locking claw operating device)
80 Plate tightening system 81 Control device 82, 82Aa, 82Ba, 82Ca, 82Da, 82Ab, 82Bb, 82Cb, 82Db Detection switch (operation switch)
83 Timer 84, 84a, 84b Plate body selection switch 85, 85a, 85b Human sensor 86, 86Aa, 86Ba, 86Ca, 86Da, 86Ab, 86Bb, 86Cb, 86Db Push button type belly switch (operation switch)
87, 87Aa, 87Ba, 87Ca, 87Da, 87Ab, 87Bb, 87Cb, 87Db Push button type foot switch (operation switch)
88,88Aa, 88Ba, 88Ca, 88Da, 88Ab, 88Bb, 88Cb, 88Db Push button type switch (operation switch)
94a, 94b Work floor 95a, 95b, 96a, 96b Safety bar A1, A2, A3, A4 Printing plate mounting area W, W1, W2 Web (printing medium)

Claims (10)

One end of the printing plate is locked to the plate cylinder, the printing plate is wound around the outer peripheral surface of the plate cylinder, and the operator holds the other end of the printing plate on the other end of the printing plate. A plate tightening system that locks and fastens the printing plate.
A plate clamping device in which one end is locked to the plate cylinder and the locking claw is locked to the other end of the printing plate wound around the outer peripheral surface of the plate cylinder to fasten the printing plate.
A locking claw actuating device for engaging and disengaging the locking claw with respect to the other end of the printing plate,
When the operation command signal of the locking claw actuating device is input after the printing plate whose one end is locked to the plate cylinder is wound around the outer peripheral surface of the plate cylinder, the locking is performed after a predetermined time has elapsed. The control device that operates the claw actuating device and
Bei to give a,
The predetermined time is set based on the waiting time for the operator to press the other end of the printing plate.
A plate tightening system featuring that. An operation switch for operating the locking claw operating device is provided, and the control device operates the locking claw operating device after a lapse of a predetermined time when the operation command signal output by the operation of the operating switch is input. The plate tightening system according to claim 1, wherein the plate tightening system is characterized. The plate tightening system according to claim 2, wherein the operation switch is a push button type switch that can be operated by an operator. The plate tightening system according to claim 3, wherein the push button type switch is arranged at substantially the same height as the plate cylinder and faces the operator. The plate tightening system according to claim 3, wherein the push button type switch is a foot switch arranged on a floor where an operator performs plate tightening work. The plate tightening system according to claim 3, wherein a safety bar is arranged on the outer periphery of the plate cylinder in parallel with the plate cylinder, and the push button type switch is arranged on the safety bar. The plate tightening system according to claim 2, wherein the operation switch is a detection switch that detects a worker's hand that presses the printing plate wound around the outer peripheral surface of the plate cylinder. A motion sensor for detecting that the operator is on the floor where the plate tightening operation is performed is provided, and the control device detects the operator by the motion sensor and inputs the operation command signal for a predetermined time. The plate tightening system according to any one of claims 1 to 7, wherein the locking claw actuating device is activated after the lapse of time. A plurality of the printing plates can be mounted on the plate cylinder along the axial direction, and the plate tightening device can individually restrain the plurality of the printing plates with the locking claws, and the locking claw actuating device. The plate tightening system according to any one of claims 1 to 8, wherein the locking claws that restrain the plurality of printing plates can be individually operated. An ink supply device that supplies ink and
A plate cylinder in which ink is supplied from the ink supply device to a printing plate mounted on the outer peripheral portion,
A blanket cylinder that transfers the image of the ink received from the plate cylinder to the web, and
The plate tightening system according to any one of claims 1 to 9.
A printing machine characterized by being equipped with.

Images