JPH03176152A - Plate vice device in sheet printing press - Google Patents

Abstract

PURPOSE:To reduce a time for replacing a plate by a method wherein a driver connected to the both ends of a bite-side cam shaft and a tail-side cam shaft set within a cutout in the peripheral surface of a cylinder is provided, a bite-side plate vice and a tail-side plate vice are simultaneously opened, and both the cam shafts are closed at a position of the plate cylinder having a different phase from that of a position for opening both the plate vices. CONSTITUTION:At the replacement of a plate, a plate cylinder 1 is stopped where a tail-side plate vice 30 is opposed to a working surface. By actuating a driver, a bite-side plate vice 5 and the tail-side plate vice 30 are simultaneously opened. Thus, an old plate 89 can be removed by almost one rotation of the plate cylinder 1. Thereafter, the plate cylinder 1 is rotated, the bite-side plate vice 5 is opposed to the working surface, the bite-side end of a new plate 105 is inserted into the bite-side plate vice 5 in open states, the bite-side plate vice 5 is closed, and the plate cylinder 1 is rotated through almost 360 degrees until the tail-side plate vice 30 is opposed to the working surface, whereby the plate is wound around the peripheral surface of the cylinder. Thereafter, the tail-side end of the plate is inserted into the tail-side plate vice 30 in open states, the tail-side plate vice 30 is closed, and then the plate replacing operation is completed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a sheet-fed printing press in which a gripping side plate vise and a tail side plate vise in a circumferential notch are connected by rotating a camshaft. This relates to a plate vise device that opens and closes to grip both ends of a printing plate.

[Prior Art] In a notch provided on the outer periphery of the plate cylinder of a sheet-fed printing press along the entire length of the cylinder, there is a grip side plate vise for gripping the grip side end of the printing plate (hereinafter simply referred to as the plate). , and a plate vise that grips the butt end of the plate wrapped around the barrel circumferential surface, and a plate vise device is fixed to the bottom of the notch and extends in the axial direction of the barrel. has been done.

These conventional grip-side and tail-side plate vises have a long vise base extending in the direction of the axis of the body, and are positively pivoted by a plurality of bolts at the edge of this vise base, and their swinging is supported by a plurality of bolts. It is equipped with a plurality of gripping plates that are opened and closed to hold and release the plate between the vise table and a plurality of cams that engage with notches in the end edges of each of these gripping plates. The 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 engagement of the cam and the compression coil spring is released. 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 extend 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 bent piece of the plate is held in its mouth by moving the gripping plate positively using the cam mechanism.Then, by moving the entire bottom plate vise in the circumferential direction, the plate is stretched evenly and the body is stretched. Closely adheres to the surrounding surface.

By the way, in such a conventional sheet-fed printing press, when the specifications of printed matter change and the plate is replaced with a new one, the plate cylinder is rotated so that the rear camshaft faces the working position. Open the bottom side plate vise by rotating the side cam shaft, and while holding one end of the plate released from the gripper, rotate the plate cylinder until the gripper side plate vise faces the work surface. The old plate is removed by opening the grip side plate vise and releasing the other end of the plate from the grip by rotating the side cam shaft. Thereafter, a new plate is mounted by repeating the opening and closing of the plate vise and rotation of the plate cylinder in the same manner.

[Problems to be Solved by the Invention] However, in such a conventional plate vise device, as described above, the rotating operation of the gripper side cam shaft to open the gripper side plate vise and the rotation operation of the gripper side plate vise are required. Since the rotating operation of the rear camshaft that releases the force must be performed at a different phase position of the plate cylinder, the time required to change the plate is extended, the overall preparation time is extended, and productivity is reduced. There is.

[Means to solve the problem]

In order to solve such problems, the present invention provides a drive device connected to both ends of the gripper side camshaft and the bottom side camshaft supported in the notch around the body, and the plate cylinder is moved by the operation of this drive device. The gripper side plate vise and the tail side plate vise are simultaneously opened in the stopped state, and both camshafts are closed at a phase position of the plate cylinder different from the position at which the reprint vise is opened. 7 [Operation] When changing the plate, the plate cylinder is stopped at the position where the bottom plate vise faces the work surface, and when the drive device is activated, the grip side plate vise and the bottom plate vise are connected. Since they open at the same time, the old plate can be removed by rotating the plate cylinder once.Next, rotate the plate cylinder so that the gripper-side plate vise faces the work surface, and remove the gripper-side end of the new plate. Insert the plate into the open grip side plate vise, close the grip side plate vise, and turn the plate cylinder once until the bottom side plate vise faces the work surface and wrap the plate around the cylinder surface. Thereafter, the plate replacement work is completed by inserting the bottom end of the plate into the open bottom plate vise and closing the bottom plate vise.

〔Example〕

1 to 13 show an example in which the printing plate holding device according to the present invention is implemented in an automatic printing plate changing device, FIG. 1 is a plan view of a plate cylinder in which this is implemented, and FIG. ■-■ cross-sectional view of
Figure 3 is a sectional view of [[l-111] in Figure 1, and Figure 4 is a cross-sectional view of Figure 1.
5 is a sectional view taken along the line ■-■ in FIG.
FIG. 7 is a side view of the plate vise opening/closing device, FIG. 8 is a partially cutaway side view of the upper half of the plate holding device, FIG. 9 is a partially cutaway side view of the lower half of the plate holding device, and FIG. FIG. 10 is a side view of the plate holding device, FIG. 11 is a schematic side view of the entire plate changing device embodying the present invention, and FIGS. 12(a) to (b) are diagrams for explaining the plate changing operation. FIG. 13 is an enlarged front 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. A guide 3°4 formed in the shape is 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 that is square in cross section and extends in the axial direction of the body. The guide 3.4 is fitted in such a way that vertical movement is regulated and slight movement in the circumferential direction is allowed.

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 threaded holes 6b, the cross section of which is shown in FIG. The 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 placed in the bottle hole at the location corresponding to the adjustment screw 7, with the tip at tJ4. It is slidably inserted into contact with the tapered surface of the node screw 7. In this way, when the adjusting screw 7 is rotated, the vise table 6 is adjusted to move in the circumferential direction by an amount due to the action of the tapered surface. What is indicated by the reference numeral 9 in Fig. 5 is the stud 10 and notch 2 of the six examples of vise
This is a compression coil spring that is interposed between the plate vise 5 and the wall surface of the concave hole 2a and urges the entire plate vise 5 outward in the circumferential direction.

L-shaped grip plate holders 11 shown in FIG. In the figure, a grip plate 14 having the same overall length as the vise stand 6 and divided into three parts in the axial direction of the body has a dogleg-shaped cross section. It faces the gripping surface of the stand 6. Although not shown, a plurality of protrusions are formed on the gripping surface 14a and engage with grooves on the opposing gripping surface. A plurality of stands 15, the cross section of which is shown in FIG. The spring retainer screwed into the screw hole is Bin 1.
A compression coil spring 17 is interposed between the gripper plate 6 and the lower end recessed hole of the gripper vi14, which biases the gripper plate 14 in a direction in which the gripping surface 14a thereof closes.

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 these bearings j8 have a hexagonal cross-section camshaft. A plurality of plate gripping cams 20 each having a large diameter portion and a small diameter portion are mounted on this cam shaft 19 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 swung counterclockwise in the figure against the elastic force of the spring 17, and the gripping surface 14 is
It is configured to open a.

Inside 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 the same length as the body length, and is provided with a bar 31 having a vertical surface attached to the vertical surface of the bearing 18. is fixed to the bottom surface of the notch 2 by a plurality of ports 32.

The spring bearing bar 31 is a regulating surface 3 extending in the radial direction of the plate cylinder 1.
1a, and between the regulating surface 31a and the wall surface 2b of the notch 2, a support shaft 33 is extended with both ends close to the disc-shaped bearers 34 at both ends of the plate cylinder 1. The vise stand 35 and the grip plate 36 are divided into three parts in the direction of the barrel axis.
The gripping surfaces 35a and 36a extending in the radial direction of the plate cylinder 1 are opposed to each other, and the side opposite to the gripping surface is swingably connected by this support shaft 33. Reference numeral 37 denotes an adjustment screw that connects the three divided vise stands 35, and a right-hand screw and a left-hand screw are screwed into screw holes of each vise stand 35, so that both vise stands 3
By inserting a tool into a hole in a collar portion 37a that is integrally formed between the two vise stands 35 and rotating the tool, the distance between the two vice stands 35 can be adjusted.

In the recess 2c formed in the wall surface 2b of the notch 2, a cam 38 formed into a bar shape with a flat small diameter part 38a and an arcuate large diameter part 38b is rotatably attached to the hairer 34. The protrusion 38c from the hairler 34 is
It is formed into a hexagonal 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 urges the bar 31 in a direction to separate them from each other, and the spring receiver is slidably provided in the spring hole 31'o in the upper part of the bar 31. A compression coil spring 45 is provided between the flange of the spring shaft 44 whose end of movement is regulated by a double nut 43 and the bottom surface of the spring hole 31b, which biases the gripping plate 36 in the direction of separating the spring support from the bar 31. is loaded. In addition, the vise stand 35 is held in the spring hole at the top of the vise stand 35, and the plate 36
A compression coil spring 46 is loaded that biases in a direction to separate from the base. 47 is a blanket cylinder that is in contact with the plate cylinder 1.

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 located on the right side (hereinafter simply referred to as the right side) when viewed from the sheet feeding device side. However, in Figure 1, it is on the left side for convenience of drawing.

) will first be explained. frame 5
0, an air cylinder 51 as a drive device is swingably supported via a bracket 52, and a lever is attached to the cam shaft 19 on the gripper side and the cam 38 on the butt side. 53 and the lever 54 are the bearer 34 and the frame 5
A link mechanism, generally designated by 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 rod 56 of the air cylinder 51 is pivotally connected to the M'JiA portion 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 loft 60, whose upper end is pivoted to the other free end of the L-shaped bar 59, is connected to the lever 6 pivoted to the stand 61 of the frame 50 (1@).
It is pivotally attached to the free end of 2. A lever 63 is integrally formed with the lever 62, and a free end portion of the lever 63 is pivotally attached to one end of a roller lever 64. Reference numeral 65 denotes a lever shaft rotatably supported between the left and right frames with axial movement restricted, and this lever shaft 65 includes:
A lever 66 is rotatably supported with axial movement restricted, and a free end of the lever 66 is pivoted to the center of the roller lever 64. That is, the lever 63
, 66, A four-bar link is formed by the lever 64, and the lever 6 is driven from the air cylinder 51 side.
2 swings, the roller lever 64 moves to the lever 63.
It is configured to move forward and backward in the radial direction of the plate cylinder l with an angle of 66 degrees. At the tip of such a roller lever 64,
A roller 67 that selectively corresponds to either one of the levers 53 or 54 is pivotally mounted according to the rotational phase of the plate cylinder l, and as the roller lever 64 moves forward or backward, the lever 53 or lever 54 moves as indicated by the solid line in the figure. The camshaft 19 or the cam 3 is configured to rotate within the range shown by the chain line.

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 closed, and when the lever 54 is in the solid line position, the plate gripping surface of the rear side plate vise 30 is closed. is configured to open.

Furthermore, an opening/closing drive device having the same configuration as above but not shown in FIG. 7 is also provided on the frame side on the left (!l'J (hereinafter simply referred to as the left side) as viewed from the paper feeder; right side in FIG. 1). This opening/closing drive device is connected to the air cylinder 5.
1 to roller 67 have exactly the same structure as that shown in FIG. 7, and only lever 5354 is different. That is, in FIGS. 1, 7, and 13, the lever 5354 on the right side has its tip directed upward from the camshaft 19 and the cam 38 in the figure, but in the opening/closing drive device on the left side, the lever 5354 on the right side Reference numerals 53A and 54A are shown in the figure and Fig. 13.
A lever indicated by has its tip directed downward in the figure from the camshaft 19 and the cam 38. That is, the tip of the right butt side lever 54 and the tip of the left grip side lever 53A are in the same phase in the circumferential direction, and the rollers 6 on both sides are simultaneously moved.
It is configured to face 7. By doing this, when the left and right air cylinders 51 operate simultaneously, the lever 54 is pushed by the rollers 67 on the right side, and at the same time the plate gripping surface of the butt side plate vise 30 opens, the lever 53A on the left side is pushed by the rollers. The plate gripping surface of the side plate vise 5 is opened by moving to the position shown by reference numeral 53B in the figure, and by moving the lever 53 on the right side from the solid line position to the chain line position. Since the directions of the tips of the right lever 53 and the left lever 53A are opposite, as shown in FIG. 13, when the right lever 53 moves from the position shown by the chain line to the position shown by the solid line, , the lever 53A on the left is designated by the symbol 5.
Move from the position indicated by 3B to the position indicated by 53A. Further, when the left lever 54A moves from the position indicated by the symbol 54A to the position indicated by the symbol 54B, the right lever 54 moves to the position indicated by the symbol 54B.
Move from the position shown by the solid line to the position shown by the chain line.

11 is a cover that covers the entire front circumferential surface of the plate cylinder 1, and includes an L-shaped bar 72 rotatably supported on the upper end surface of the frame 50 via a bracket 71. The working end of a piston rod 74 of an air cylinder 73 pivotally supported on the frame 50 side is pivotally connected to the L-shaped bar 72 . By doing so, the air cylinder 73 is configured to open and close within the range shown by the solid line and the chain line in the figure by operating the air cylinder 73 in response to a command from the control device.

The plate vise device and its opening/closing device configured in this way include:
A plate changing device is attached to exchange the used old plate with the new plate to be used in the future. That is, a pair of left and right brackets 81 are fixed diagonally above the plate cylinder 1 at the rear of the upper end of the left and right frames 80 provided in the printing unit adjacent to the front of the frame 50. A loader 83 as a plate holding member, which is formed in an oblong rectangular shape with the same length as the plate cylinder 1 when viewed from the front, is attached to a swing support shaft 82 rotatably supported on the base end thereof. It is fixed and swingably provided. On the other hand, air cylinders 84 connected to a control device are installed on the left and right frames 80.
It is pivotably supported in the vicinity of the bracket 81, and
A lever 86 pivotally attached to the frame 80 side and a lever 87 pivotally attached to the loader 83 side are pivotally attached to the working end of the piston rod 85. By doing this,
When the piston rod 85 of the air cylinder 84 moves back and forth,
The loader 83 swings via the levers 86 and 87, and swings between the hanging position shown by the solid line in the figure and the IIQ hanging position shown by the chain line, and the tip moves in the direction of perspective with respect to the circumferential surface of the plate W41. is configured to do so.

As shown in FIG. 9, in the lower half of the loader 83, two guide plates 88 each having a V-shaped artificial part extend vertically. is constructed such that the plate 89, which is released from the grip by the opening of both plate vises 5 and 30, and then rewound by the rotation of the plate cylinder I, enters in the direction of the arrow. On the other hand, at the upper end of the loader 83, a plurality of oval-shaped brackets 90 each having a length of 1 m each are fixed to a tubular swinging shaft 82, so that the loader 83 can be moved in the width direction! Each set of brackets 90 is provided with a convex 91.
is supported. The convex 91 is equipped with a belt-shaped leaf spring 92 that is biased by a spring force in the winding direction, and a plate bottom holding device, generally designated by the reference numeral 93, is fixed to the unwinding end of the leaf spring 92. There is. To this plate bottom holding device 93, an L-shaped plate hanger 95, which is pivotably supported by a holder 94 of a leaf spring 92@ portion, is attached so as to be in an upright position shown by a solid line by a torsion coil spring 96. The bent end of the plate 89 that has entered between the guide plates 88 is hooked onto the hook-shaped portion of the plate hook 95. That is, before starting the replacement work of the plate 89, the entire plate bottom holding device 93 is manually lowered with the temporary spring 92 to the standby position at the center of the loader 83, and the air cylinder 97 installed at this standby position is By advancing the screws 1, 0, and 19 by pressing the push button, the plate hook 95 opens to occupy the chain line position against the elastic force of the torsion coil spring 96, and the upper end of the plate hook 95 opens. By pressing the holder 94 against the cover 99,
The plate bottom holding device 93 as a whole is configured to be prevented from rising against the tensile force of the leaf spring 92. ■008 is a sensor consisting of a light emitter and a light receiver, and is installed close to the air cylinder 97, and detects the tip of the plate 89 that has entered between the guide plates 88, thereby detecting the piston rod of the air cylinder 97. Retract 98 and hang the plate 95
is configured to stand up in a solid line state by the elastic force of the torsion coil spring 96. As a result, the bent end of the plate 89 is hooked on the plate hook 95, the holder 94 is released, and the entire plate end holding device 93 is raised together with the plate 89 by the tensile force of the leaf spring 92, and the plate 89 is lifted up. 89 is drawn into the loader 83 and stored therein. Further, a pin hole of a block 101 provided at the upper end of the loader 83 in correspondence with a plate hook 95 supports a bottle 102 so as to be slidable therein, being biased by a compression coil spring 103 in the direction of coming out of the block 101. By pushing this bottle 102 against the elastic force of the compression coil spring 103, the upper end of the plate holder 95 is pushed and tilted as shown by the chain line, and the bent part of the plate 89 is released from the holding position. It is configured to be released to allow removal from the loader 83.

Next, the plate feeding device will be explained. On the surface of the loader 83, there are a plurality of stages, three stages in this embodiment (the middle one A suction pad (not shown) 104 is provided, of which the lower suction pad 104 is formed to be movable in the vertical direction. That is, above the lower suction pad 104, a pair of left and right air cylinders 106 are supported on both side plates of the loader 83 via bracket feet 107, and the suction pad 104 has both ends attached to the piston rod 10B of the air cylinder 106. are mounted in parallel on a fixed bar 109,
As the piston rod 108 moves forward, the new version 10
The bar 109 holding the new plate 105 moves from the position shown by the solid line to the position shown by the chain line in the figure, and supplies the new plate 105 to the side plate vise 5 whose tip is open opposite to the new plate 105. . Reference numeral 110 is fixed to the left and right side plates of the loader 83, and is connected to a pinion Ill at both ends of the bar 109: meshing bar 109
This is a rack that makes it easy to retreat. A reference pin 112 is slidably fitted into a pin hole of another bar 113 and biased in the protruding direction by a compression coil spring 114, and is fitted into a reference hole of the new version 105 to position the new version 105. It is.

On the other hand, at the lower end of the loader 83, an arm shaft 115 is rotatably supported.
A rolling arm +16 is fixed to the protruding parts on both sides from the arm l16, and on a roller shaft 117 fixedly supported between the free ends of these two arms l16, a plurality of rollers, for example, shaped like a brush, are fixed. Octopuses 118 are rotatably arranged in parallel.

A piston rod 121 of an air cylinder 120 is fixed to one end of the loader in the width direction via a bracket 119.
A lever 123 is fixed to the active end of the arm via a connecting plate 122, and a free end of a lever 124 fixed to the arm shaft 115 is pivoted to the lower end of the lever 123. By doing this, when the piston rod 121 of the air cylinder 120 moves back and forth, the arm 116 moves to the ninth position.
It rotates between a storage position shown by a solid line in the figure and a use position shown by a chain line. In the use position, the rollers 118 are pressed against the new plate 105 on the plate I1F41, and this plate 105 is tightly attached to the circumferential surface of the plate cylinder 1. At the same time, the bent end of the new version 105 is inserted into the open version vise 30. Further, on the arm shaft 115, a plurality of rollers 125 formed in the shape of a brush, for example, are arranged in parallel, for slidingly contacting and guiding the new plate 105 to be supplied to the plate vise 5.

Numeral 126 is an inking roller of an inking device which is in contact with the plate surface on the plate cylinder 1 and applies ink to the plate surface, and generally four or more rollers are provided.

Each of the devices configured as described above and, for example, a servo motor for rotating the plate cylinder l are connected to a control device (not shown), and are configured to operate at predetermined timings.

The operation of the plate changing device configured as above will be explained. During the printing operation, the loader 83 moves as shown in FIG. 12(a)! The new plate 105 is suspended from the three-movement support shaft 82, and in this state, the new plate 105 is attracted to the suction pant 104 in multiple stages.
Then, by fitting the reference hole into the reference pin 112, it is positioned and mounted on the loader 83. Also, loader 8
When the plate end holding device 93 in 3 is manually pushed down and the air cylinder 97 is activated by push button operation, the piston rod 98 moves forward and pushes the plate holder 95, so the plate holder 95 is shown by the chain line in FIG. It opens by tilting like this.

When replacing the old version 89 with the new version 105 after printing is completed, press the start button and the air cylinder 7
3 is activated, the cover 7°0 is opened as shown by the chain line in FIG. ) Tilt to the plate exchange position shown in ). Further, the servo motor rotates and the plate rll rotates by a predetermined angle until it occupies the plate discharge position. At this time, when the left and right air cylinders 5I operate simultaneously, the lever 54 is pushed by the right roller 67, and at the same time the plate gripping surface of the butt plate vise 30 opens, the left lever 53A is pushed by the left roller. The number 53B is shown in the figure.
The lever 53 on the right side moves from the solid line position to the chain line position, and the side plate vise 50 plate gripping surface opens. And the right lever 54 and the left lever 54A
Since the direction of the tip is opposite to that of the 13th
As shown in the figure, when the right lever 54 moves from the position shown by the chain line to the position shown by the solid line, the left lever 54A coaxial therewith moves from the position shown by the symbol 54B to the position shown by the symbol 54Δ.
Move to the position indicated by . Further, when the left lever 53A moves from the position indicated by 53A to the position indicated by 53B, the right lever 53 coaxial therewith moves from the position indicated by the solid line to the position indicated by the chain line. In this way, the plate cylinder l
At the stop position, the gripping side plate vise 5 and the rear side plate vise 30 open simultaneously, and the lever 53 and the lever 54A return to the positions in which the plate vise 5.30 will be closed later. .

In this state, the butt side end of the old plate 89 pops out from between the butt side vise due to its rigidity, and the guide 1 shown in FIG. 12(C)
30, after which the plate cylinder I rotates in the opposite direction of the arrow in FIG. When the entered old plate 89 passes through the sensor 100, the sensor 100 detects this and operates the air cylinder 97, causing the piston rod 98 to retreat, so that the plate hanger 95 stands up as shown by the solid line in FIG.

As a result, the plate hook 95 hooks the bent end of the old plate 89 on the rear side, and the holder 94 is unlocked, so that the entire plate tail holding device 93 generates a tensile force accumulated in the leaf spring 92 provided on the convex 91. The old plate 89 held by the plate rack 95 is drawn into the loader 83 and stored. FIG. 12(d) shows a state in which the old version 89 is being ejected.

When the plate discharge is completed in this way, the servo motor is activated to rotate the plate cylinder l slightly, and the open plate gripping surface of the grip side plate vise 5 is held by the loader 83 as shown in FIG. It stops at a position that is an extension of the new version 105, and
Since the air cylinder 106 is operated and the bar 105 is lowered while rotating the pinion Ill on the rack 110,
The new plate 105 held by the lower suction para l-104 descends while being guided in sliding contact with the rollers 125, and the new plate 105
is inserted into the gripper side plate vise 5 with its gripper side end.

At this time, the lever 53 shown in FIG. 7 is in the chain line position and faces the roller 67 as described above, so when the air cylinder 51 is actuated, the camshaft 19 rotates together with the lever 53 and the side plate vice is applied. 5 is closed, and the new version 105 is held in the grip side version vise 5. FIG. 12(e) shows this state.

In this state, the servo motor rotates and the plate cylinder I rotates in the direction of the arrow, and the new plate 105 is wrapped around the circumferential surface of the plate cylinder L so that its bent end on the rear side corresponds to the roller 11B. Stop.

When the plate cylinder l rotates, the rollers 125 move to the new plate 105.
Since the new plate 105 rotates while being pressed against the surface of the plate cylinder l, the new plate 105 is brought into close contact with the circumferential surface of the plate cylinder l. After this, air cylinder 12
0 operates, the piston rod 121 retreats, and the lever 1
23. The arm 116 rotates via 124, and the brush-like roller 118 is pressed against the circumferential surface of the plate cylinder l, whereby the bent end of the new plate 105 is inserted into the plate vise 30 by the bend 118. be done. FIG. 12(f) shows a state in which the plate cylinder 1 is in the middle of rotation, and FIG. 12(f) shows a state in which the plate cylinder 1 is stopped after rotation.

When the butt side end of the new plate 105 is pushed into the butt side plate vise 30, the left air cylinder is activated, but at this time, as described above, the lever 54A has returned to the position indicated by the reference numeral 54A in the figure. , the roller pushes down the lever 548, and the rotation of the cam 38 closes the butt side plate vise 30 to grip the insertion end of the new plate 105. At the end of the rotation of the cam 38, the vice stand 35 and the gripping plate 36 move together in the circumferential direction of the plate cylinder I, so that the new plate 105 is stretched and tightly adheres to the circumferential surface of the plate cylinder I. .

After this, the piston rod 85 of the air cylinder 84 moves back and pulls the levers 86 and 87, so the loader 83 is lowered to the retracted state as shown in FIG. Since the cover 70 is closed, printing work can be resumed.

After restarting the printing work, if you stand in front of the loader 83 and press the pin 102 at an appropriate time, the plate hanger 95 will tilt and release the old plate 89 from its holding, so you will not have to take out the old plate 89 from the loader 83. You can also, as mentioned above,
The new version 105 can be attached to the loader 83 and prepared during the marking 11GII work.

Although this embodiment shows an example in which the present invention is implemented in an automatic plate changing device, the present invention is not limited to this, and the plate vise device may be operated by push buttons or the like.

(Effects of the Invention) As is clear from the above description, according to the present invention, in a plate vise device for a sheet-fed printing press, the gripper side camshaft and the bottom side camshaft supported in the notch around the trunk are A connected drive device is provided, and the operation of this drive device simultaneously opens the grip side plate vise and the tail side plate vise when the plate cylinder is stopped, and also opens both camshafts and both plate vises. By configuring the plate cylinder to close at a different phase position from the open position,
Since the plate vise on the grip side and the plate vise on the bottom side can be opened at the same time while the plate cylinder is stopped at the l position, the time for changing plates is shortened, and the overall preparation time is shortened, increasing production. Improves sex.

[Brief explanation of drawings]

1 to 13 show an embodiment of a plate vise device for a sheet-fed 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 -■ Cross-sectional view, Figure 3 is the 1st
III-III sectional view in the figure, Figure 4 is N-■ in Figure 1
5 is a sectional view of V■ in FIG. 1, FIG. 6 is a longitudinal sectional view of the butt side plate vise before the plate grip, FIG. 7 is a side view of the plate vise opening/closing device, and FIG. 8 9 is a partially cutaway side view of the upper half of the plate holding device, and FIG. 9 is a part w1. of the lower half of the 91st plate holding device.
10 is a side view of the printing plate holding device, FIG. 11 is a schematic side view of the entire printing plate changing device embodying the present invention, and FIGS. 12(a) to (h) are plate changing operations. 13. Schematic side view of the entire printing plate changing device and main parts shown for explaining the
The figure is an enlarged front view of the plate vise opening/closing device. 1... Plate cylinder, 2... Notch, 5... Mouth side plate vise, 19... Cam shaft, 30... Butt side plate vise, 3rd... ...Cam, 51...Air cylinder,
53.53A, 54.54A... Lever 55.
...Link PIJ't:l, F37...Koro.

Claims (1)

[Claims] a gripping side cam supported in the notch, comprising a gripping side plate vise and a tail side plate vise arranged in an outer peripheral notch of the plate cylinder and gripping both ends of the printing plate wound around the cylinder circumference; In a plate vise device for a sheet-fed printing press, in which the grip side plate vise and the tail side plate vise are respectively opened and closed by rotating the shaft and the tail side cam shaft, The position where the grip side plate vise and the bottom side plate vise are opened at the same time when the plate cylinder is stopped and both camshafts are connected to both ends of the plate cylinder is different from the position where both the plate vises are opened. A plate vise device for a sheet-fed printing press, characterized in that it is provided with a plate vise opening/closing drive device that closes the plate vise at a phase position.