JP2726661B2 - Plate insertion device for sheet-fed printing press - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automatic plate insertion device in a sheet-fed printing press. [Prior Art] FIGS. 7 and 8 show a manual plate clamping device which has been frequently used recently. FIG. 7 shows a state in which upper teeth are open, and FIG. 8 shows a state in which upper teeth are closed. This shows a state in which the plate is bitten. In the figure, 01 is a plate cylinder, 02 is a head side plate clamping device, 03
Is a rear side plate clamping device, 04 and 05 are upper teeth of the plate clamping devices 02 and 03, and 06 and 07 are biting cams of the plate clamping devices 02 and 03. In such a device, the head side of the plate 09 is inserted into the clamp device 02 in the state shown in FIG. 9, the upper teeth 04 are closed by the biting cam 06, and the plate cylinder 01 is rotated in the direction of the arrow. Next, as shown in FIG. 10, the body is rotated to a position where operability is good for inserting the buttocks side of the plate 09. (At this time, the plate 09 is moved along the surface of the plate cylinder 01 by hand.) The plate 09 is bent as indicated by a broken line to insert the plate tail. Next, as shown in FIG. 11, after the plate edge enters the clamping device 03, the upper teeth 05 are closed by the biting cam 07, and the pulling cam 08
Move the entire clamping device 03 in the direction of the arrow to
To finish the plate change. Since a series of these operations enter the space between the printing units and operate the plate, the space is very small and the operation posture is poor. Moreover, the operation push button is operated while holding the plate bottom with one hand (to rotate the plate cylinder and stop the M / C), which is a dangerous operation. [Problems to be Solved by the Invention] The sequential time required for each change of the print item greatly affects the operation rate of the printing press. The change time occupies a large weight in the preparation time. Conventionally, various devices have been devised for the plate clamping device and the accompanying devices in order to reduce the plate changing time and improve the operation rate of the printing press. The plate replacement work varies considerably in time depending on the printing site (there is a difference between skilled and inexperienced people due to human operations). Inserting the buttocks into the clamping device takes up a relatively large amount of time. In addition, the space is inevitably worse because the space between the printing units is used to operate the plate in terms of space. Therefore, there has been a request for unmanned operation and labor saving by automation for some time, and some attempts have been made, but none has been successful. [Means for Solving the Problems] a. A means for fitting the plate to the drum surface (to make the plate conform without skimmer) is provided. In the past, a manual press was performed by hand, but a rubber roller is used so as not to damage the plate surface, and the entire length of the plate surface is pressed against the plate cylinder surface by a fluid pressure cylinder. b. Provide a means to bend the plate butt and insert it into the clamp device. In the past, people bent the plate and inserted it by hand,
When the plate edge is bent in advance (using a plate bending machine) and the plate is pressed down with a roller, the plate is inserted into a clamp device (a biting device separately applied). By combining the sliding motion and the rotating motion of the rubber roller, the plate can be quickly mounted. c. Perform the above series of operations sequentially by electric control. d. After the plate replacement is completed, move the entire apparatus to the standby position so as not to hinder printing work such as wiping the plate. [Operation] When the plate copper is rotated with the plate copper clamping device biting the head end of the plate, the rubber roller of the plate insertion device presses the plate against the plate copper surface. Most of the plate is wrapped around the plate copper surface,
When the tail side of the plate approaches the plate copper clamping device, the rubber roll bends the plate tail end and inserts it into the clamping device. Thereafter, the rubber roll is retracted to a lower standby position. First Embodiment In FIGS. 1 to 6, reference numeral 1 denotes a shaft. Arms 3 are fixed to both ends, supported by an arm 11 and a bracket 14 via a bearing 4, and serve as a rotation center of the roller 2. A roller 2 is supported by the arm 3 via a bearing 26. It has the function of pressing the plate 33 against the surface of the plate copper 31 and inserting the tail end of the plate into the clamp device. An arm 3 rotatably fixes the shaft 12 and supports both ends of the roller 2. The arm 3 rotates about the shaft 1 when the cylinder 5 is operated. Reference numeral 4 denotes a bearing that supports the shaft 1 and is fixed to the bracket 14. Reference numeral 5 denotes a cylinder, which is attached to the bracket 15 and whose rod end serves as a drive source for rotating and moving the roller 2 connected to the shaft 12. Reference numeral 6 denotes a motor whose output shaft is connected to the screw rod 10 by a joint 23. A drive source for moving the bracket 14 up and down. Reference numeral 7 denotes a rail (rail), which is a guide rail fixed to the frame by a bracket 8 and slidingly guiding the bracket 14. Reference numeral 8 denotes a bracket, which serves as a frame mounting member for the way 7. Reference numeral 9 denotes a bracket, which is attached to a frame and regulates the position of the arm 11 by two cam followers 25. Reference numeral 10 denotes a threaded rod, one end of which is connected to an output shaft of the motor 6 by a joint 23, and the other end of which is fitted in a nut built in the bracket 14. Reference numeral 11 denotes an arm, which is a support arm for the shaft 1, and the shaft 18 is rotatably protruded and a cam follower 25 is attached. A shaft 12 is rotatably mounted on the arm 3 and is connected to a rod of the cylinder 5. Reference numeral 13 denotes a table, which fits in the way 7 and slides with a small resistance. 14 is a bracket which is connected to the table 13 and
And a set of support members for the cylinder 5. Reference numeral 15 denotes a bracket, which is fixed to the shaft 18 and is a support plate for the cylinder 5. The support plate 15 can swing the cylinder 5 when the bearing 4 rotates. Reference numerals 16 and 17 denote spring receivers at both ends of the roller 2 for supporting springs that apply a friction torque to the roller 2. 18 is a shaft, bracket 14, arm
It is rotatably attached to 11 and fixed to the bracket 15. When the cylinder 5 is operated, it becomes the center of rotation (oscillation). 19 is a cover which covers the device and the drive system. Reference numeral 20 denotes a cover, which covers the moving section (slide) of the apparatus. Reference numeral 21 denotes a plate, which serves as a mounting and fixing member for the switch 22. Reference numeral 22 denotes a switch for controlling rotation stop of the motor 6. 23 is a joint for connecting the screw rod 10 and the shaft of the motor 6. Reference numeral 24 denotes a bracket, which serves as a frame mounting member for the motor 6. A cam follower 25 is fixed to the arm 11 and supported by the bracket 9. The rotation of the arm 11 is stopped. Reference numeral 26 denotes a bearing, which serves as a support member for the roller 2. 31 is a plate copper, 32 is a rubber copper, 33 is a plate, and 34 is a frame of the device. In such a device, the old version is removed and the new version is inserted at the standby position shown in FIG. The shaft 1 and the roller 2 extending between the frames are
It stands by at the position shown in the figure between the plate copper 31 and the rubber copper 32. At this time, the cylinder 5 is in the retracted state. In this state, the plate 33 of the plate 33 is inserted and fixed to the head-side clamping device of the copper plate 31. From the state shown in FIG. 3, the state shown in FIG. The cylinder 5 extrudes and the shaft 1
The arm 3 rotates around the center, and the roller 2 comes into contact with the surface of the plate copper 31. The plate 33 is pressed by the roller 2 and is wound around the surface of the plate copper 31 without any gap. During the rotation of the copper plate 31, the motor 6 rotates,
Upon receiving the driving force from the screw rod 10, the bracket 14
Moves. Naturally, the cylinder 5 and the roller 2 mounted on the bracket 14 perform the same movement. At this time, cylinder 5
Is in an extruded state, the roller 2 moves upward while pressing the plate 33. At the position where the tail end of the plate 33 is inserted into the clamping device, the switch 22 is operated and the motor 6 is stopped (see FIG. 5). The cylinder 5 is retracted from the state of FIG. 5 in which the printing plate insertion is completed, the arm 3 rotates about the shaft 1 and the roller 2 separates from the printing plate 31 (see FIG. 6). The motor 6 rotates from this state to the standby position shown in FIG. 3 (until the lower switch 22 operates). Second Embodiment In FIGS. 12 to 15, reference numeral 41 denotes a shaft, which is supported by arms 43 at both ends.
An arm 44 is fixed on the shaft 41. Also shaft 41
Reference numeral denotes a support shaft of the roller 42, which has a torque transmitting action for equalizing the plate pressing force by the roller 42 in the width direction. Reference numeral 42 denotes a roller (rubber-wound roller), both ends of which are supported by an arm 44 via bearings. Roller 42 plate copper plate 33
31 While pressing against the surface, insert the edge of the plate into the clamp device. Reference numeral 43 denotes an arm which rotates around a support 45. A shaft 41 is fixed to one end, and a rod 49 is connected to the other end. The arm 43 rotates about the column 45 when the cylinder 47 operates, and changes the position of the roller 42. An arm 44 projects from the shaft 41 and supports the roller 42 via a bearing. Reference numeral 45 denotes a support, which serves as a fulcrum on which the arm 43 rotates. 46 is a connecting pin between the arm 43 and the rod 49. Reference numeral 47 denotes a cylinder, which is supported by a column 48 so as to be able to rotate (swing), and an output shaft end is connected to a rod 49. The cylinder 47 is a driving source for the rotational movement of the roller 42 and the plate pressing force. Reference numeral 48 denotes a support, which serves as a fulcrum of the cylinder 47. Reference numeral 49 denotes a rod, which is connected to the output shaft end of the cylinder 47, a part of the arm 43 enters the groove, and is connected by a pin 46. In such a device, the old version is removed and the new version is inserted at the standby position shown in FIG. The shaft 41 and the rollers 42 extending between the frames always stand by at the position shown in FIG. 12 (a place where they do not interfere with other operations) between the plate copper 31 and the rubber copper 32. At this time, the cylinder 47 is in the retracted state. At the same time that the copper plate 31 starts rotating from the state shown in FIG.
The state shown in Fig. 13 is obtained. Cylinder 47 is pushed out, arm 45
The roller 42 comes into contact with the surface of the plate copper 31 via 43. The plate 33 is pressed by the roller 42 and is wound around the surface of the plate copper 31 without any gap. At the phase shown in FIG. 14, since the cylinder 47 is in the pushed-out state, the roller 42 rotates about the column 45 while pressing the plate (pressed against the surface of the clamp device). When the plate edge is inserted into the clamp device, the cylinder 47
Returns to the standby position as shown in FIG. [Effects of the Invention] As described above, according to the present invention, an arm supported to be swingable in proximity to the plate copper surface, a cylinder that swings the arm, and a tip end of the arm parallel to the plate cylinder. And a roller attached to the plate cylinder, while rotating the plate cylinder having the plate head end clamped, and by retracting the cylinder, the roller is separated from the plate cylinder by a pull-out position. A roller is movably provided at a fitting position in contact with the rotating plate cylinder surface, and at a plate butt insertion position where the roller inserts the plate butt end into the butt-side clamp device of the plate cylinder by continuous pushing of the cylinder from the fit position. In the standby position for retraction of the cylinder, the rollers are separated from the plate cylinder, making it easy to insert new plates without obstructing other operations, and to fit the cylinder by pushing it out. In the position, the roller is in contact with the plate cylinder, the plate is wound around the plate cylinder surface without any gap, and at the position where the plate is inserted in the continuous cylinder extrusion, the roller is inserted into the plate-side clamp device, and the plate-side clamp device is inserted. The plate insertion can be automated, thereby shortening the time required for plate exchange, saving labor and labor, and improving the safety of plate exchange work.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a plate edge inserting device of a sheet-fed printing press according to a first embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIGS. FIG. 1 is an operation state diagram of the apparatus. FIG. 7 shows a state in which the upper teeth are opened in the conventional manual plate clamping device, and FIG.
The figure shows a state in which the upper teeth are closed and the plate is bitten, and FIGS.
The figure shows the operating state diagram. FIG. 12 is a side view of the second embodiment of the present invention in a standby position, FIGS. 13 and 14 are operating state diagrams of the same, and FIG. 15 is a plan view of FIG. 2 ... roller, 3 ... arm 5 ... cylinder, 6 ... motor 7 ... track, 10 ... screw rod 13 ... table, 31 ... plate cylinder 32 ... blanket cylinder, 33 ... plate 34 ... frame

Claims (1)

(57) [Claims] An arm pivotally supported in proximity to the surface of the plate cylinder, a cylinder for pivoting the arm, and a roller attached to a tip of the arm in parallel with the plate cylinder, and clamping a plate head end; A standby position in which the roller is separated from the plate cylinder by retracting the cylinder while rotating the plate cylinder, a fitting position in which the roller contacts the surface of the plate cylinder on which the roller rotates by pushing the cylinder from the standby position; Wherein the roller is movably provided from a position where the roller continuously inserts the trailing edge of the plate into the trailing edge clamp device of the plate cylinder by continuous extrusion of the cylinder. apparatus.