JPH0376649A - Plate vise in printing press - Google Patents

Abstract

PURPOSE:To automatize the loading/unloading of plate on/from a plate cylinder by a method wherein a pair of levers of single side are fixed to one end and the other end of each cam shaft, and the plate cylinder is rotated to selectively bring a free end part into opposed contact with a roller. CONSTITUTION:Where a right-hand roller 67 corresponds to a clamp-side lever 53, an air cylinder 51 of this side is actuated and a piston rod 56 thereof moves backward. Then, the roller 67 presses the lever 53 to a position shown by a full line through a link mechanism to rotate a cam shaft 19 to shake a clamp plate 14 by a large-diameter part of a cam 20. A clamp surface 14a is opened to release the clamping of a plate. After that, the right-hand air cylinder 51 is actuated to move the piston rod 56 forward to make the roller 67 run off from the lever 53. Where a plate cylinder 1 is rotated to bring a left-hand roller into opposed contact with a tail-side lever, a left-hand air cylinder is actuated and a piston rod thereof moves backward. Then, a cam 38 is rotated so as to bring a small-diameter part thereof into opposed contact with a tail-side vise 35, whereby a plate clamp surface 35a is opened to release the plate from being clamped. In this manner, the loading of the plate is automatized.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a plate that is provided on a plate cylinder of a printing press and that fixes the grip side and tail side of the plate wrapped around the cylinder circumferential surface within a cylinder circumferential notch. It concerns a vise device.

[Conventional technology]

On the outer periphery of the plate cylinder of various printing presses, there is a notch that spans the entire length of the cylinder and has a rectangular cross section. and a plate vise device that grips the butt end of the plate wrapped around the body circumferential surface, and a plate vise device is fixed to the bottom of the notch and extends in the axial direction of the body. It is set up.

These conventional grip side and tail side plate vises include a long vise base extending in the direction of the axis of the body, and a plurality of bolts pivotably supported at the edge of the vise base. It is equipped with a plurality of gripping plates that are driven to open and close to grip and release the plate from the vise table, and a plurality of cams that engage with the notches in the end edges of each of these gripping plates. A plurality of cams are fixed in parallel on a rotatable cam shaft. Furthermore, a plurality of compression coil springs are interposed between the vice stand and the grip plate to bias the grip plate in the opening direction.

With this structure, when holding a plate in your mouth, when you rotate the camshaft, the gripping plate, which is divided into multiple parts in the lengthwise direction of the body, is released from the cam's hold and is activated by the compression coil spring. They open all at once due to the elastic force, so after inserting the end of the plate between the grip plate and the vise table and rotating the camshaft in the opposite direction, the grip plate will open under the compression coil spring due to the action of the cam. It oscillates against the spring force and closes, holding the edge of the plate in its mouth.

Further, for example, the device disclosed in Japanese Patent Application Laid-Open No. 1-127346 has a mechanism in which the gripping surface on the bottom side of the plate, which was conventionally formed in the circumferential direction of the plate cylinder, is now formed in the radial direction of the plate cylinder. A force stand and a gripping plate are arranged in the radial direction of the plate cylinder, and the ends of the plate are bent at right angles by a separate plate bending machine.

With this configuration, the bent end of the plate that is wrapped around the body circumferential surface with the end of the gripper side in the gripper's mouth can be placed between the vice stand and the gripper plate. The folded piece of the plate is inserted and the cam mechanism swings the gripping plate to hold the folded piece of the plate in its mouth.Then, by moving the entire bottom plate vise in the circumferential direction, the plate is stretched evenly. Closely adheres to the circumferential surface of the torso.

[Problem to be solved by the invention]

However, in such conventional plate vise devices, the camshaft must be manually rotated to open and close the plate gripping surface as described above, which increases man-hours and degrades work efficiency. There is a problem in that not only a great deal of labor is required, but also preparation time is extended, resulting in a decrease in productivity.

[Means to solve the problem]

In order to solve such problems, the present invention opens and closes the plate gripping surfaces of the vise table and the gripping plate by rotating a pair of cam shafts mounted in the outer peripheral notch of the plate cylinder. In a plate vise device of a printing press, which is equipped with a grip side plate vise and a tail side plate vise that hold one end and the other end of the plate wrapped around the cylinder circumference, respectively, the plate cylinder is placed near one end and near the other end. A link mechanism is connected to each of the drive devices respectively disposed in the plate cylinder, and a lever rotating member is provided at the end of the plate cylinder side that moves forward and backward in the radial direction of the plate cylinder due to the movement of the link mechanism driven by the drive device. A pair of levers on one side are fixed to one end and the other end of each camshaft, respectively, and the free end portion is selectively brought into contact with the lever rotation member by rotating the plate cylinder. It was configured as follows.

[For production]

When replacing the plate, when the lever rotating member on one side corresponds to the lever on the gripper side, the drive device on this side operates to push the lever through the link mechanism, rotate the camshaft, and rotate the cam with a large diameter. Since the gripper is driven # by the section, the gripping surface opens and releases the grip of the plate. From this state, the plate cylinder rotates, and when the lever rotation member on one side comes into contact with the lever on the bottom side, the drive device on one side is activated, the cam rotates, and the small diameter part of the cam rotates, and the small diameter part is placed in the vise on the bottom side. Since it is in contact with the stand, the plate gripping surface opens and releases the plate from the grip, allowing the used plate to be removed.

Next, the plate cylinder rotates and the lever rotating member on one side corresponds to the lever on the gripper side, so when one end of a new plate is inserted into the plate gripping surface on the open gripper side, the drive device on one side is activated. Then, the camshaft rotates, and the small diameter portion of the cam grips and temporarily contacts the plate, thereby closing the gripping plate and gripping the plate. Next, after rotating the plate cylinder once, inserting the bent part of the other end of the new plate into the plate gripping surface on the open butt side, the drive device on one side is activated and the large diameter part of the cam is placed in the vise table. Since you press this against each other, the gripping surface closes and the plate can be held in your mouth.

[Example] Figures 1 to 7 show an example of the plate vise device for a printing press according to the present invention. ■-■ Cross-sectional view of Figure 3 is the ■-■ cross-sectional view of Figure 1.
-■ Cross-sectional view, Figure 4 is the IV-rV cross-sectional view of Figure 1, and Figure 5 is
The figures are a cross-sectional view taken along the line ■--■ of FIG. 1, FIG. 6 is a longitudinal cross-sectional view of the butt-side plate vise before the plate grip, and FIG. 7 is a side view of the plate vise opening/closing device. In the figure, a notch 2 with a rectangular cross section is provided on the outer periphery of the plate cylinder l, extending over the entire length of the cylinder, and at both ends of the notch 2,
Saddle-shaped guides 3 and 4 are bolted to the bottom of the notch. The gripper side vise, which is designated by the reference numeral 5 as a whole, is equipped with a vise stand 6 having a square cross section and extending in the axial direction of the body.
is fitted in the left and right guides 3 and 4 such that vertical movement is restricted and movement is allowed slightly in the circumferential direction. Note that the vise stand 6 is slidably pressed at its intermediate portion by a plurality of guides (not shown) fixed to the bottom surface of the notch 2 to prevent it from rising. A plurality of screw holes 6b, the cross section of which is shown in FIG. is screwed into the bottle hole corresponding to the adjustment screw 7, and a flanged bottle 8 whose flanged portion is inserted into the gap between the vise stand 6 and the wall surface of the notch 2 is used to adjust the tip. Neshi 7
It is slidably inserted into contact with the tapered surface of the By doing so, when the tlfflT screw 7 is rotated, the vise table 6 is adjusted to move by a small amount in the circumferential direction due to the action of the tapered surface.

The stud 1 on the vise stand 6 side is indicated by the reference numeral 9 in FIG.
A plate vise 5 is interposed between 0 and the wall surface of the concave hole 2a of the notch 2.
It is a compression coil spring that biases the entire body outward in the circumferential direction.

At a plurality of locations on the inclined surface of the vise stand 6, grip plate holders 11 in the shape of a square shown in FIG. , a grip plate 14 having the same overall length as the vise stand 6 and having a cross section divided into three parts in the direction of the body axis is swingably supported. It faces the gripping surface of the mouth. Although not shown, the gripping surface 14
A has a plurality of protrusions formed thereon and engages with grooves on the opposing gripping surface. A plurality of studs 15, the cross section of which is shown in FIG. A compression coil spring 17 is interposed between the bottle 16 and the lower end concave hole of the gripping plate 14, which is screwed into the screw hole, and biasing the gripping plate 14 in the direction in which its gripping surface +4a closes. There is.

On the other hand, in the center of the bottom surface of the notch 2, a plurality of rectangular bearings 18 are fixed with bolts in parallel in the axial direction of the cylinder, and a camshaft with a hexagonal cross section is attached to these bearings 18. A plurality of plate gripping cams 20 each having a large diameter part and a small diameter part are mounted on this cam shaft I9 in the axial direction. They are mounted on shafts in parallel. The cam surface of each plate gripping cam 20 is in contact with the vertical surface of each gripping plate 14, and by rotating the cam shaft 19 with a drive device to be described later, the large diameter portion of the plate gripping cam 20 is turned into a compression coil. The gripping plate 14 is driven counterclockwise in the figure against the elastic force of the spring 17, and the gripping surface 14 is
It is configured to open a.

In the notch 2, a butt-side vise, generally indicated by the reference numeral 30, is provided parallel to the gripping side blades 5. This butt side vise 30 is formed to have a viewing length different from the trunk length, and the spring bearing whose vertical surface is attached to the vertical surface of the bearing 18 is a bar 3I.
The spring bearing bar 31 is fixed to the bottom surface of the notch 2 with a plurality of bolts 32. The spring bearing bar 31 is a regulating surface 31 extending in the radial direction of the plate WAl.
a, and this regulating surface 31a and the wall surface 2 of the notch 2
A support shaft 33 extends between the plate cylinder 1 and the plate cylinder 1, with both ends close to the disc-shaped bearers 34 at both ends of the plate cylinder 1. The grippers 35a and 36a extending in the radial direction of the plate cylinder 1 are opposed to each other, and the side opposite to the gripper surface is swingably connected by this support shaft 33. Reference numeral 37 is an adjustment screw that connects the three divided vise stands 35, and a right-hand thread and a left-hand thread are screwed into the screw holes of each vise stand 35, and both vise stands are screwed together. 35
The spacing between both vise stands 35 is adjusted by inserting a tool into a hole in a collar portion 37a that is integrally formed between them and rotating the tool.

In the recess 2c formed in the wall surface 2b of the notch 2, a cam 38 formed in a bar shape with a flat small diameter part 38a and an arcuate large diameter part 38b is rotatably attached to the pairer 34. The protrusion 38c from the bearer 34 is 6
It is formed into a corner shape.

Further, 40 is a guide for guiding the rotation of the cam 38, and is fixed to the recess 2c of the notch wall surface 2b by a port 41. Further, between the bottom surface of the plurality of spring holes formed in the opposite end of the vise table 35 and the bottom surface of the plurality of spring holes formed in the spring receiver bar 31, there are 3
5 and the spring receiver are interposed with a compression coil spring 42 that biases the bar 31 in a direction to separate them from each other, and the spring receiver is slidably provided in the spring hole 31b at the upper part of the bar 31 and is attached to a double nut. Spring shaft 4 whose movement end limit is regulated by 43
A compression coil spring 45 is loaded between the flange 4 and the bottom surface of the spring hole 31b for biasing the grip plate 36 in a direction to move the spring receiver away from the bar 31. Also, vise stand 3
A compression coil spring 46 is loaded into the spring hole in the upper part of the clamp 5 to bias the vise stand 35 away from the grip plate 36. 47 is a blanket cylinder that is in contact with the plate cylinder l.

Next, a description will be given of an opening/closing drive device that rotates the cam shaft 19 and the cam 38 to open and close the plate gripping surface. This opening/closing drive device is provided close to the left and right frames 50 that pivotally support the plate cylinder 1, blanket cylinder 47, etc., and is hereinafter referred to as the right side (hereinafter simply referred to as the right side) when viewed from the sheet feeding device side. An example of 50 frames will be explained. frame 50
An air cylinder 51 as a driving device is rotatably supported on the upper end surface via a bracket 52, while the cam shaft 19 on the gripper side and the cam 38 on the butt side are
The lever 53 and the lever 54 are connected to the bearer 34 and the frame 50.
A link mechanism, generally designated by the reference numeral 55, is provided between these levers 53, 54 and the air cylinder 51. That is,
The tip of the rod 57 connected to the piston loft 56 of the air cylinder 51 is pivoted to the free end of an L-shaped bar 59 rotatably supported on the upper surface of the frame 50 via a bracket 58. , the lower end of the rondro o whose upper end is pivotally attached to the other free end of the L-shaped bar 59 is attached to the frame 5.
It is pivotally attached to the free end of a lever 62 that is pivotally supported on the stand 61 of the example. A lever 63 is integrally formed with the lever 62, and a free end of the lever 63 is pivotally connected to one end of a lever 64. Reference numeral 65 denotes a lever shaft that is rotatably supported between the left and right frames with its axial movement restricted, and a lever 66 is rotatably supported on the lever shaft 65. The lever 66 is movably supported, and the free end of the lever 66 is pivotally connected to the center of the roller lever 64. That is, the levers 63 and 66 and the roller lever 64 form a four-bar link, and when the lever 62 is driven by the air cylinder 51 side, the lever 64 moves along with the levers 63 and 66 to the plate cylinder 1. It is configured to move forward and backward in the radial direction.

A roller 67 that selectively corresponds to one of the levers 5354 according to the rotational phase of the plate cylinder 1 is pivotally attached to the tip of the roller lever 64, and as the lever 64 moves forward and backward, The lever 53 or the lever 54 is configured to swing within a range shown by a solid line and a chain line in the figure, and the camshaft 19 or the cam 38 is rotated. and,
In the device on the right, when the lever 53 is in the solid line position, the plate gripping surface of the gripper side plate vise 5 is opened, and when the lever 54 is in the solid line position, the plate gripping surface of the rear side plate vise 30 is opened. It is configured to close.

And the left side as seen from the paper feeder (hereinafter simply referred to as the left side)
An opening/closing drive device (not shown) having the same configuration as above is also provided on the frame side of the frame, and this opening/closing drive device has exactly the same configuration from the air cylinder 5 to the roller 67, and has a lever 53°. Only 54 are different. That is, in FIG. 7, the levers 53, 54 have their tips directed upward from the camshaft 19 and cam 38 in the figure, but in the opening/closing drive device on the left side, the levers 53, 54 are indicated by the reference numeral 53A in FIG.
, 54A have their tips directed downward in FIG. 7 from the camshaft 19 and the cam 38. By doing this, when the lever 53A is pushed by the roller, the plate gripping surface of the grip side plate vise 5 is closed, and when the lever 54A is pushed by the roller, the plate gripping surface of the bottom side plate vise 30 is opened. It is composed of Note that both air cylinders are electrically connected by ink lock wiring, and when the piston rod of one air cylinder retreats, the piston rod of the other air cylinder does not retreat, so the camshaft 19 and cam 38 The structure is such that rotation between the two can be performed smoothly.

The operation of the plate vise device configured as described above will be explained in the case of plate replacement work. When the roller 67 on the right side corresponds to the lever 53 on the grip side, the air cylinder 51 on this side operates and its piston rod 56 retreats.
The roller 67 pushes the lever 53 to the solid line position in the figure through the link mechanism, rotates the camshaft 19, and swings the gripping plate 14 with the large diameter part of the cam 20, so the gripping surface 14a opens and the plate is opened. Release the grip. At this time, the piston rod of the left air cylinder does not move backward due to the ink lock action, and the rollers remain in a state where they escape from the lever, so the rotation of the camshaft 19 is not hindered.

After this, the air cylinder 51 on the right side is activated, the piston rod 56 moves forward, and the roller 67 escapes from the lever 53. From this state, the plate cylinder 1 rotates, and when the roller on the left side comes into contact with the lever on the rear side, the air cylinder on the left side is activated and its piston rod retreats, and the cam 38 rotates to remove the small diameter part. is in contact with the vise stand 35 on the butt side, so the sixth
As shown in the figure, the plate gripping surface 35a opens to release the plate from the grip. At this time, the right air cylinder 51 does not move back due to the ink lock action and the roller 67 remains in the state where it escapes from the lever 54, so the rotation of the cam 38 is not hindered. After this, the left air cylinder is activated, the piston rod moves forward, and the rollers escape from the lever 54A. Next, the plate is sucked by a suction device (not shown), and the plate cylinder l slowly rotates once in the opposite direction, so that the used plate is removed.

Next, the plate cylinder 1 rotates and the roller on the left side corresponds to the lever on the gripper side, so that the plate gripping surface 1 on the open gripper side
When one end of a new plate is inserted into 4a, the air cylinder on the left side is operated and its piston rod moves backward, so the camshaft 19 rotates and the small diameter part of the cam 20 comes into contact with the gripping plate 14, and the gripping plate 14 closes and holds the plate in its mouth. after this,
The left air cylinder operates and its piston rod moves forward, causing the roller to escape from the lever. Next, after the plate cylinder 1 rotates once in the forward direction by slow movement, the other end bent portion of a new plate is inserted into the open plate gripping surface 35a on the bottom side, and the air cylinder 51 on the right side is activated. The piston rod 56 moves backward, and the large diameter part of the cam 3 is moved to the vice stand 3.
5 and presses it, the gripping surface 35a closes and the plate is gripped. To explain this gripping operation in more detail, in the plate gripping operation on the butt side, as shown in FIG. The vise stand 35 and the grip plate 36 are released from the compression coil spring 42.45.
．． Due to the elastic force of 46, they are tilted in opposite directions about the support shaft 33. Therefore, I placed the bent part of the plate on the vise stand 3.
5 and the gripping surface 36a of the gripping plate 36, when the air cylinder 51 is activated,
As the cam 38 rotates, its large diameter portion 38b begins to come into contact with the vice stand 35 as shown in FIG. Resisting the elastic force of the coil springs 45 and 46, stand upright and hold the bent part of the plate in your mouth. Further, the cam 38 continues to rotate, and the large diameter portion 38b
When the vise stand 35 is pushed, at the end of the rotation of the cam 38, the vise stand 35 and the grip plate 36 work together against the elastic force of the compression coil springs 42, 45, and 46. Plate cylinder 1
Since the plate moves in the circumferential direction of the plate cylinder 1, the plate is stretched and comes into close contact with the circumferential surface of the plate cylinder 1. At this time, the spring shaft 44 is pushed, and a gap is formed between the double nut 43 and the gripping plate 36. In this way, it is possible to continuously grip and tension the plate simply by rotating the cam three times. After this, the air cylinder on the right side is activated and its piston rod moves forward, causing the roller to escape from the lever.

(Effects of the Invention) As is clear from the above explanation, according to the present invention, by rotating a pair of cam shafts mounted in the outer peripheral notch of the plate cylinder, the plate gripping between the vice stand and the gripping plate is performed. Open and close the surface,
In a plate vise device of a printing press, which is equipped with a grip side plate vise and a tail side plate vise that hold one end and the other end of the plate wrapped around the cylinder circumference, respectively, the plate cylinder is placed near one end and near the other end. A link mechanism is connected to each of the drive devices respectively disposed in the plate cylinder, and a lever rotating member is mounted on the plate cylinder side end of the link mechanism to advance and retreat in the radial direction of the plate cylinder by the movement of the link mechanism driven by the drive device. A pair of levers are fixed to one end and the other end of each camshaft, respectively, and the free end portion is selectively brought into contact with the roller by rotating the plate cylinder. This makes it possible to automate the loading and unloading of plates on the plate cylinder, greatly reducing labor and
Preparation time is reduced and productivity is increased.

[Brief explanation of drawings]

1 to 7 show an embodiment of a plate vise device for a printing press according to the present invention, FIG. 1 is a plan view of a plate cylinder in which this is implemented, and FIG. 2 is a plan view of ■-■ in FIG. Cross-sectional view, Figure 3 is the l of Figure 1.
-111 sectional view, Figure 4 is the TV-IV sectional view of Figure 1,
FIG. 5 is a cross-sectional view taken along the line ■--■ in FIG. 1, FIG. 6 is a longitudinal cross-sectional view of the butt-side plate vise before the plate is gripped, and FIG. 7 is a side view of the plate vise opening/closing device. L...Plate cylinder, 2...Notch, 5...Gripper side plate vise, 6...Vise stand, 14...Gripper plate,
14a...Gripping surface, 19...Cam shaft, 3
0... Butt side vise, 35... Vise stand, 36... Gripping plate, 35a, 36a... Gripping surface, 51...
・Air cylinder, 53, 54.53A, 54A...
・Lever, 55...Link mechanism, 64...Roller lever 67...Roller.

Claims (1)

[Claims] By rotating a pair of cam shafts mounted in the notch on the outer periphery of the plate cylinder, the plate gripping surface between the vice stand and the gripping plate is opened and closed, and one end and the other end of the plate wrapped around the cylinder are opened and closed. In a plate vise device for a printing press equipped with a grip side plate vise and a tail side plate vise that hold the plate cylinder in its mouth, the plate cylinder includes a drive device disposed near one end of the plate cylinder and a drive device disposed near the other end thereof, respectively; Link mechanisms connected to each drive device, and lever rotation that advances and retreats in the radial direction of the plate cylinder due to the movement of the link mechanism that is pivotally connected to the end of each link mechanism on the plate cylinder side and is driven by the drive device. and a pair of levers on one side that are fixed to one end and the other end of each of the camshafts and rotate the plate cylinder to selectively bring the free ends into contact with the rollers. A plate vise device for printing presses.