JPH03176153A - Device for supplying pressplate to place cylinder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a method for supplying a printing plate held by a printing plate holding device to a printing plate fixing device provided in a notch on the outer periphery of the printing cylinder. Related to Plate Supply Device 7 [Prior Art] A notch with a rectangular cross section extending the entire length of the cylinder is provided on the outer periphery of the plate cylinder of a sheet-fed printing press. , a grip side plate vise that fixes the grip side end of the printing plate (hereinafter simply referred to as the plate), and a tail side plate vise that fixes the bottom side end of the plate that is fixed to this and then wrapped around the body circumference. A plate fixing device consisting of a plate vise is fixed to the bottom of the notch and extends in the axial direction of the cylinder.

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 a plurality of bolts at the end of the vise base to allow the vise to swing freely. It is equipped with a plurality of gripping plates that are opened and closed by movement to hold and release the plate from the vise table, and a plurality of cams that engage with notches at 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 stand, rotate the camshaft in the opposite direction to the previous direction. 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 separately provided 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 end of the plate is held in its mouth by swinging the gripper with the cam mechanism.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.

However, in such conventional plate mounting devices on the plate cylinder, it is difficult to insert the plate into the narrow opening of the grip side plate vise, which not only requires a long time and a great deal of labor, but also reduces the circumference of the cylinder. Because the plate that is being wound around the plate and guided into the plate vise does not stick tightly to the circumferential surface of the plate cylinder, it is best to insert the plate plate bent at a right angle into the opening of the plate vise. There are problems in that it is difficult, takes more time, and increases the burden of labor.

Therefore, a device for feeding a printing plate to a printing cylinder has been proposed, for example, as disclosed in Japanese Patent Application Laid-open No. 58-187355. This printing plate supply device includes an arm to which a suction pad is fixed at the tip, and a grip side hook and a bottom side hook for mounting the plate are provided on the plate cylinder side.

In a device configured in this way, when a plate is attached to the circumferential surface of the plate cylinder, the arm that has absorbed one plate with the suction pad is moved between the place where the plate is placed and the hook on the gripping side on the outer periphery of the plate cylinder. After the plate is moved and the bent end of the plate is hooked on the hook on the gripping side, the plate is wrapped around the circumference of the trunk, and the other bent end of the plate is hooked on the hook on the butt side in the same manner as above. .

[Problem to be solved by the invention]

However, in such conventional devices, the bent end of the plate is hooked onto a hook on the plate cylinder side, as shown in L, so it is difficult to stretch the plate so that it tightly contacts the circumferential surface of the cylinder. Is there a structure? The problem is that it is 11.

[Means to solve the problem]

In order to solve these problems, in the present invention, the plate fixing surface of the plate fixing device provided in the notch on the outer periphery of the plate cylinder is formed to extend in the circumferential direction of the plate cylinder. A printing plate holding device whose surface is flush with the plate fixing surface is provided, and a plurality of suction pads are provided on the surface of this printing plate holding device,
A reference pin that engages with a reference hole on the plate side is provided, and the suction pad is held by a holding member that is held on the plate holding device side and driven forward and backward in the radial direction of the plate cylinder by a drive device.

1 action] Prior to mounting the plate on the plate cylinder, the plate is attracted to a number of suction pads provided on the surface of the plate holding device, and the reference holes of the plate are engaged with the reference pins on the plate holding device. After positioning,
By rotating the plate cylinder, the plate gripping surface of the plate vise on the gripping side
Stop the plate cylinder so that the suction pad is located on the \' extension line.

Then, when the gripping surface is opened and the holding member holding the suction pad is moved toward the plate cylinder, the straight edge of the plate on the gripping side is inserted into the open plate gripping surface. When the grip side is closed, one end of the plate is held in the grip side plate vise. Then, when the plate cylinder is rotated once,
The bottom end of the plate faces the plate gripping surface of the bottom plate vise of the open plate cylinder, and the presser roller inserts the other end of the plate into the plate gripping surface of this plate vise, so that the gripping surface The plate is installed by closing the . After this, when the rear plate vise is moved in the circumferential direction of the plate cylinder, the plate vise is tightened and comes into close contact with the cylinder circumferential surface. In this case, since both ends of the plate are firmly held in the plate vise, the plate vise can be sufficiently tensioned.

〔Example〕

1 to 12 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 cross-sectional view taken along III-III in Figure 1, and Figure 4 is a cross-sectional view of Figure 1.
5 is a sectional view taken along V-■ 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. In Figure 0, which is a schematic side view of the entire plate changing device and its main parts, a cross section is shown on the outer periphery of the plate cylinder 1. A notch 2 formed in a rectangular shape is provided over the entire length of the body, and at both ends of this notch 2, guides 3 and 4 formed in a saddle shape are attached to the bottom of the notch. is bolted to.

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. It is fitted into 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 threaded holes 6b, the cross section of which is shown in FIG. is screwed into the pin hole corresponding to the adjustment screw 7, and a flanged pin 8 whose flanged portion is inserted into the gap between the vise stand 6 and the wall surface of the notch 2 adjusts the tip. It is slidably inserted in contact with the tapered surface of the screw 7. By doing so, when the adjusting 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 one indicated by reference numeral 9 in FIG. 5 is interposed between the stud 10 of the six vise tables and the wall surface of the recessed hole 2a of the notch 2, and urges the entire plate vise 5 outward in the circumferential direction. It is a compression coil spring.

L-shaped temporary grip holders ti shown in FIG. A gripping plate 14 having the same overall length as the vise stand 6 and having a dogleg-shaped cross section divided into three parts in the direction of the axis of the body is swingably supported, and its gripping surface 14a is attached to the vise stand 6. It faces the gripping surface. 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. The spring receiver screwed into the screw hole is placed between the pin 16 and the recessed hole at the lower end of the gripping plate 14, so that the gripping plate 14 can be held on its gripping surface! A compression coil spring 17 is interposed to bias 4a in the closing direction.

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 portion and a small diameter portion are mounted on one camshaft in the axial direction. The shafts are mounted parallel to each other. 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 surface 14 is moved counterclockwise in the figure against the elastic force of the spring 17.
It is configured so that a can be opened.

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 whose vertical surface is attached to the vertical surface of the bearing 18. is fixed to the bottom surface of the notch 2 with a plurality of bolts 32.

Bar 31 of the spring holder is version IF! A support shaft 33 is provided with a regulating surface 31a extending in the radial direction of the plate cylinder 1, and between the regulating surface 31a and the wall surface 2b of the notch 2, a support shaft 33 has both ends arranged in a disc shape at both ends of the plate cylinder 1. The vise stand 35 and the gripping plate 36, which extend in close proximity and are each divided into three parts in the cylinder axis direction, are connected to grippers 35a and 36 which extend in the radial direction of the plate cylinder l.
a are opposed to each other, and the side opposite to the gripping surface is swingably connected by this support shaft 33. 37 is a vise stand 3 that has been reduced by 1/3
The right-hand thread and the left-hand thread are screwed into the threaded holes of the respective vise stands 35, and the screws are located between both vise stands 35 and integrated. By inserting a tool into the hole of the formed collar portion 37a and rotating it,
The space between both vise stands 35 is configured to be adjusted.

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 bearer 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, the bottom surface of the plurality of spring holes formed at the end of the counter grip (!ll) of the vise stand 35 and the spring receiver are connected to the buff 31.
A compression coil spring 42 is interposed between the vise stand 35 and the spring support bar 31 in a direction to separate them from each other. The spring receiver is slidably provided in the spring hole 31b at the top of the bar 31, and a gripper Fi 36 is placed between the collar 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. The spring receiver is loaded with a compression coil spring 45 that urges it away from the bar 31. Also,
A compression coil spring 46 is provided in the spring hole in the upper part of the vise table 35 to bias the vise table 35 in a direction to separate it from the grip plate 36.
is loaded. 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 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.

) on the frame 50 side will be explained. An air cylinder 51 as a drive device is mounted on the upper end surface of the frame 50.
is pivotally supported via a bracket 52,
On the other hand, a lever 53 and a lever 54 are located between the bearer 34 and the frame 50 and fixed to the cam shaft 19 on the grip side and the cam 38 on the butt side, and these levers 53, 54 and the air cylinder 51 is provided with a link mechanism generally designated by the reference numeral 55. That is, the tip of the loft 57 connected to the piston rod 56 of the air cylinder 51 is connected to a single-shaped lever 59 rotatably supported on the upper surface of the frame 50 via a bracket 58.
is pivotally connected to the free end of the lever 59, and the other '
The lower end of the Londro 0, whose upper end is pivotally attached to the fi end, is pivotally attached to the free end of a lever 62 that is pivoted to a stand 61 on the frame 50 side. The lever 62 has a lever 63
is integrally formed, and the Tj end of this lever 63 is
It is pivotally attached to one end of the roller 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
It is pivoted at the center of 4. That is, lever 63.
66, a 4wg link is formed by the roller lever 64, and the lever 62 is driven from the air cylinder 51 side.
2), 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 1 with an angle of 66 degrees. At the tip of such a roller lever 64,
A roller 67 that selectively corresponds to one of the levers 53 and 54 is pivotally mounted according to the rotational phase of the plate cylinder l, and as the lever 64 moves forward and backward, the lever 53 or lever 54 is moved as indicated by the solid line in the figure. The cam shaft 19 or the cam 38 is configured to swing 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, the left side (hereinafter simply referred to as the left side) when viewed from the paper feeder.

An opening/closing drive device (not shown in FIG. 7) with the same configuration as above is also provided on the frame side (on the right side in FIG. 1). It has exactly the same configuration as that shown in Figure 7,
Only the levers 53 and 54 are different. That is, the first
In the figure and FIG. 7, the levers 53 and 54 on the right side have their tips directed upward in the figure from the cam shaft 19 and the cam 38, but in the opening/closing drive device on the left side, the levers 53 and 54 in FIG. 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 left grip side lever 53A and the tip of the right butt side lever 54A are configured to be in the same phase in the circumferential direction and simultaneously oppose the rollers 67 on both sides. When the air cylinders 51 of are operated at the same time and the lever 54 is pushed by the right roller 67,
At the same time as the plate gripping surface of the butt side plate vise 30 opens, the lever 53
A is pushed by the left roller, the lever 53 on the right (!!'1) moves to the chain line position, and the plate gripping surface of the grip side plate vise 5 opens.

11 is a cover that covers the entire front circumferential surface of the plate cylinder l, and is an L-shaped bar rotatably supported on the upper end surface of the frame 50 via a bladder 7) 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 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 to the upper end rear portions of left and right frames 80 provided in the printing unit adjacent to the front of the frame 50, and are positioned obliquely above the plate cylinder l. A loader 83 as a plate holding member, which is formed into an oblong rectangular shape with the same length as the plate cylinder 1 when viewed from the front, fixes the base end of the swing support shaft 82 rotatably supported on the swing support shaft 82. It is installed so that it can swing freely. 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
At the working end of the piston port/end 85, there is a frame 80.
A lever 86 is pivotally attached to the side, and a lever 87 is pivotally attached to the loader 83 side. By doing this, when the piston rod 85 of the air cylinder 84 advances or retreats, 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 tilted position shown by the chain line. However, the tip portion is configured to move in a direction toward and away from the circumferential surface of the plate cylinder 1.

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 configured such that the plate 89, which is released from the grip by opening the rear plate vise 30 and then rewound by the rotation of the plate cylinder l, enters in the direction of the arrow. On the other hand, at the upper end of the loader 83, a plurality of sets of brackets 90 each having two oval-shaped brackets 90 are fixed to a tubular biaxial support shaft 82, and the loader 83 is fixed in the width direction. The brackets 90 are provided at positions divided into three equal parts, and a convex 91 is supported by each set of brackets 90. 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. In this plate bottom holding device 93, an L-shaped plate hanger 95, which is swingably supported by a holder 94 at the end of a plate spring 92, is biased by a torsion coil spring 96 so that it assumes an upright position as shown by a solid line. 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. In other words, before starting the work of replacing plate 89, hold the plate! The entire J unit 93 is a leaf spring 9
2 to the central standby position of the loader 83, and by advancing the piston rod 98 of the air cylinder 97 provided at this standby position by operating a push button, the plate holder 95 is activated by the torsion coil spring. 9
By pressing the holder 94 against the cover 99 at the upper end of the plate hanger 95, the entire plate end holding device 93 is opened by the tensile force of the leaf spring 92. It is configured to prevent the vehicle from rising. 100 is an air cylinder 9 consisting of a light emitter and a light receiver.
7 and is a sensor provided close to the guide plate 88.
By detecting the tip of the plate 89 that has entered in between, the piston rod 98 of the air cylinder 97 is moved back, and the plate hanger 95 is raised to a solid line state by the elastic force of the torsion coil spring 96, and the plate 89 is bent. At the same time, the end is hooked on the plate hook 95, the holder 94 is unlocked, and the entire plate bottom holding device 93 rises together with the plate 89 due to the tensile force of the plate spring 92, and the plate 89 is pulled into the loader 83. It is configured to be stored.

Furthermore, a pin 102 is slidably supported in a pin hole of a block 101 provided at the upper end of the loader 83 in correspondence with the plate hook 95, and is biased by a compression coil spring 103 in the direction of coming out of the block 101. This pin 102
By pushing 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 hold and removed from the loader 83. is configured to allow removal of the

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 (not shown) are 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 via both sides of the loader 83 (plaques 7 on 11+a) 107, and the suction pad 1
04 is the piston rod 108 of this air cylinder 106
The piston rods 10B are mounted in parallel on a bar 109 whose both ends are fixed to the piston rod 10B, and as the piston rod 10B moves forward,
The bar 109 holding the new plate 105 moves from the position shown by the solid line in the figure to the position shown by the chain line, and is configured to supply the new plate 105 to the gripper side plate vise 5 which is open opposite to the tip thereof. There is. 110 is on the left and right of the loader 83 (!!
This rack is fixed to the J plate and engages with the binions 111 at both ends of the bar 109 to facilitate the retreat of the bar 109. 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, an arm shaft 115 is rotatably supported at the lower end of the loader 83.
Roller arms 116 are fixed to the protrusions on both sides from the arms 116, and a plurality of, for example, brush-shaped roller shafts 117 are fixedly supported between the free ends of the arms 116. 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 the storage position shown by the solid line in the figure and the use position shown by the chain line.
05 to bring the new plate 105 into close contact with the circumferential surface of the plate cylinder 1, and the bent end of the new plate 105 on the rear side is inserted into the open rear plate vise 30. Further, on the arm shaft I15, a plurality of rollers 125 formed in the shape of a brush, for example, are arranged in parallel to guide the new plate 105 supplied to the plate vise 5 in sliding contact. 12
Reference numeral 6 denotes an inking roller of an inking device which is in contact with the plate surface on the plate cylinder l and applies ink to the plate surface, and generally four or more rollers are provided.

Each device configured as described above and, for example, a servo motor for rotating the plate cylinder 1 are connected to a control device (not shown), and are configured to operate at predetermined timings.

The operation of the plate changing device equipped with the plate holding device as described above will be explained. During printing work, the loader 83 is suspended from the #pull drive shaft 82, as shown in FIG.
In this state, the new plate 105 is adsorbed by the multi-stage suction buffs 104 and positioned by fitting the reference holes to the reference pins 112 and mounted on the loader 83. Also,
When the discharge plate gripping device 93 in the loader 83 is manually pushed down to the timing position and at the same time the air cylinder 97 is activated by push button operation, the piston rod 98 moves forward and pushes the plate hanger 95, so that the plate hanger 95 is placed in the eighth position. It tilts as shown by the chain line in the figure, and one end pushes the support plate 94 and brings it into pressure contact with the inner wall surface of the cover 99 of the main body of the apparatus, so that the entire apparatus is fixed in the waiting position, and the plate rack 95 is tilted. It opens in the posture and the hook-shaped part at the lower end is in an open state.

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, and the cover 70 is opened via the L-shaped bar 72.
The air cylinder 8 opens as shown by the chain line in Figure 1.
4 is activated and the loader 83 is moved to the first position via the levers 86 and 87.
2. Tilt to the plate exchange position shown in Figure 2(b). Further, the servo motor rotates and the plate cylinder I rotates by a predetermined angle until it occupies the plate discharge position. In this case, as shown in FIG. 12(C) and FIG. 9, the butt side vise 30 faces the tip of the loader 83, and the right roller 67 is placed on the camshaft 38 as shown in FIG. The tip of the lever 54 is opposed to the tip of the lever 54 . Also,
The tip of the left roller faces the lever 53A on the camshaft 19, which is in the same phase as the lever 54. In this state, the left and right air cylinders 51 operate simultaneously, so the camshaft 38.
By the rotation of 19, the grip side vise 5 and the butt side vise 30 are simultaneously opened.

In this state, due to its rigidity, the butt end of the old plate 89 flies out from the gripping surface of the open butt side vise 30 and hits the guide 130 shown in FIG. 12(C).
After this, the plate cylinder 1 rotates in the opposite direction of the arrow in FIG.
The butt side of the old version 89 enters between the guide plates 88 of the loader 83. When the insertion end of the old version 89 that has entered passes the sensor 100, the sensor 100 detects this and releases the air cylinder 97.
is actuated and the piston rod 98 is moved backward, so that the plate hanger 95 stands up as shown by the solid line in FIG.

As a result, the plate hanger 95 hooks the bent end of the old plate 89 on the rear side, and the support plate 94 is released from the fixation by pressure contact, so that the entire discharged plate gripping device 93 is moved to the convex 91.
It rises due to the tensile force accumulated in the leaf spring 92 provided in the
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 slightly rotate the plate cylinder 1, 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 109 is lowered while rotating the binion 111 on the rack 110,
The new plate 105 held by the lower suction pad 104 descends while being guided in sliding contact with the rollers 125, and the grip side end of the new plate 105 is inserted into the grip side plate vise 5. At this time, the lever 53 shown in FIG. 7 faces the roller 67, so when the air cylinder 51 is actuated, the camshaft 19 rotates together with the lever 53, and the new plate 105 is held in the grip side plate vise 5. FIG. 12(e) shows this state.

In this state, the servo motor rotates and the plate cylinder l rotates in the direction of the arrow, and the new plate 105 is wrapped around the circumferential surface of the plate cylinder l and stops at a position where the bent end on the rear side corresponds to the roller 118. do.

When the plate cylinder 1 rotates, the rollers 125 are rotated against the new plate 105.
Since the new plate 105 rotates while being pressed against the surface of the plate cylinder 1, the new plate 105 is brought into close contact with the circumferential surface of the plate cylinder 1. After this, air cylinder 12
0 operates, the piston rod 121 retreats, and the lever 1
The arm 116 is rotated via the rollers 23 and 124, and the brush-like roller 11B is pressed against the circumferential surface of the plate cylinder I. As a result, 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(g) shows a state in which it has stopped after rotation.

When the butt end of the new plate 105 is inserted into the butt vise 30, the left air cylinder is activated and the rollers push down the lever 54A, so the rotation of the cam 38 causes the butt vise 30 to move. Close it and hold the insertion end of the new version 105 in your mouth. and cam 38
At the end of the rotation, the vise stand 35 and the gripping plate 36 move together in the circumferential direction of the plate cylinder 1, so that the new plate 10
5 is stretched and tightly adheres to the circumferential surface of the plate cylinder l.

After this, the piston rod 85 of the air cylinder 84 moves back and pulls the levers 86 and 87, so the loader 83 hangs down and enters the retracted state as shown in FIG. will close, allowing you to resume printing.

After restarting the printing operation, if you stand in front of the loader 83 and push the pin 102 at an appropriate time, the plate hanger 95 will tilt and release the old plate 89 from its holding, making it possible to take out the old plate 89 from the loader 83. You can also, as mentioned above,
A new version 105 can be prepared by mounting it on the loader 83 during printing work. Further, the space between the printing units when the loader 83 is stored is not reduced.

Although this embodiment shows an example in which the present invention is implemented in an automatic printing plate changing device, the present invention is not limited to this, and the printing plate holding device may be operated by push buttons or the like. Further, although this embodiment shows an example in which the present invention is applied to a sheet-fed printing press, it can also be applied to a web-fed rotary printing press having a similar plate fixing device, and similar effects can be obtained. There's no need for you.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the plate fixing surface of the plate fixing device provided in the outer peripheral notch of the plate cylinder is formed to extend in the circumferential direction of the plate cylinder. A printing plate holding device whose surface is flush with the plate fixing surface is provided on one side, and a plurality of suction pads are provided on the surface of the printing plate holding device,
By providing a reference pin that engages with a reference hole on the plate side, and holding the suction pad by a holding member that is held between the plate holding devices and moved back and forth in the radial direction of the plate cylinder by a drive device, The structure is simpler than before, and the printing plate attached to the printing cylinder is firmly gripped by the gripping surfaces of both plate vises, allowing the printing plate to be fully stretched and tightly attached to the cylinder circumferential surface. This improves printing registration accuracy.

[Brief explanation of the drawing]

1 to 12 show an embodiment of the printing plate holding device 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 of Figure 3 shows ■-■ of Figure 1.
4 is a sectional view taken along IV-rV in FIG. 1, FIG. 5 is a sectional view taken along v-■ in FIG. Figure 7 is a side view of the plate vise opening/closing device, Figure 8 is a partially cutaway side view of the upper half of the plate holding device, and Figure 9 is a side view of the plate vise opening/closing device.
The figure is a partially cutaway side view of the lower half of the plate holding device, FIG. 10 is a side view of the plate holding device, FIG. 11 is a schematic side view of the entire plate changing device in which the present invention is implemented, and FIG. 12 (a) to Φ) are schematic side views of the entire printing plate changing device and essential parts shown for explaining the printing plate changing operation. , 2゛l...plate cylinder, 2...notch, 5...mouth side plate vise, 30...bottom side plate vise, 82...swing support shaft , 83... Loader, 104... Suction pad 7
105...New version, 106...Air cylinder, 108...Piston rod', 109...Bar 112...Reference bin.

Claims (1)

[Claims] A plate fixing surface of a printing plate holding device provided in an outer peripheral notch of the plate cylinder is formed to extend in the circumferential direction of the plate cylinder, and the surface on the outside of the plate cylinder is substantially flush with the plate fixing surface. A printing plate holding device is provided, and a plurality of suction pads and a reference pin that engages with a reference hole on the printing plate side are provided on the surface of the printing plate holding device, and the suction pads are connected to the printing plate holding device. A device for supplying printing plates to a printing cylinder, characterized in that the device is held by a holding member that is held at the side and driven forward and backward in the radial direction of the printing cylinder by a drive device.