JP2550417B2 - Plate mounting device for plate cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention wraps a printing plate, one end of which is fixed to a one-end fixing device provided in an outer peripheral cutout of a plate cylinder, around a drum peripheral surface. The present invention relates to a plate mounting device for a plate cylinder that mounts a plate on the plate cylinder by fixing the other end to a device for fixing the other end.

[Conventional technology]

The plate cylinder of the sheet-fed printing press is provided with a notch having a rectangular cross section over the entire length of the cylinder, and one end of a printing plate (hereinafter simply referred to as a plate) is provided in the notch. A printing plate fixing device including a holding-side plate vise as a fixing device for fixing, and a bottom-side plate vise as a fixing device for fixing the other end of the plate wound around the body circumferential surface, which is held by the holding plate vise. Is extended in the trunk axis direction fixed to the bottom surface of the notch.

Conventionally, these gripping side and butt side plate vises are provided with a long vise table extending in the body axis direction and a swingable pivotally supported by a plurality of bolts at the end edge of the vise table. A plurality of holding plates for holding and releasing the plate with the vise base by opening and closing by motion, and a plurality of cams that engage with the edge cutouts of these holding plates, A plurality of cams are fixed in parallel on a rotatable cam shaft. Further, a plurality of compression coil springs for urging the holding plate in the opening direction are interposed between the vise table and the holding plate.

With this configuration, when the plate is gripped, when the cam shaft is rotated, the grip plate divided into a plurality in the cylinder length direction is released from the engagement of the cam and the compression coil spring Since it opens all at once due to the elastic force, after inserting the end of the plate between the holding plate and the vise, rotate the cam shaft in the opposite direction to the one before, and the holding plate is compressed by the action of the cam. It swings and closes against the elastic force of, and holds the edge of the plate.

Further, for example, in the device disclosed in Japanese Patent Laid-Open No. 1-127346, the rear side gripping surface of the plate, which was conventionally formed in the circumferential direction of the plate cylinder, is formed in the radial direction of the plate cylinder. A force stand and a gripper plate are extended in the radial direction of the plate cylinder, and the ends of the plate are bent at right angles by a plate bending machine provided separately. By being configured in this way,
The bottom edge of the plate, which is held around the edge of the edge of the edge and wound around the body, inserts the bent portion between the vise and the edge of the vise, and rocks the edge of the edge with a cam mechanism. Since the bent end of the plate is gripped by moving the plate, the plate is uniformly stretched and closely adheres to the body circumferential surface by moving the entire rear side plate vise in the circumferential direction.

[Problems to be Solved by the Invention]

However, in such a conventional plate mounting device for a plate cylinder, it is difficult to insert the plate into the narrow opening of the holding-side plate vise, and it not only takes a long time and a lot of labor, but also the drum circumference It is difficult to insert the plate butt, which is bent almost at a right angle, into the opening of the butt-side plate vise because the plate that guides to the butt-side plate vise does not adhere to the peripheral surface of the plate cylinder. However, there is a problem that the burden of labor, which takes more time, increases.

[Means for solving the problem]

In order to solve such a problem, in the present invention, the peripheral surface of the plate cylinder is always in contact with and is positioned corresponding to the fixing device at the time of inserting the plate into the fixing device, and the plate is placed in the fixing device. A guide roller that guides the plate when inserting it, and that guides the plate closely to the plate cylinder when winding the plate around the plate cylinder, and is supported detachably on the peripheral surface of the plate cylinder, and inserts the plate into the other end fixing device. Occasionally, the presser roller is positioned corresponding to this fixing device and is in contact with the peripheral surface of the plate cylinder so that the other end of the plate is inserted into this fixing device while the guide roller is in close contact with the plate cylinder. And.

In addition, a plate holding device for holding the plate is provided, and with the plate holding device supported obliquely above the plate cylinder, the front end of the plate holding device moves forward and backward with respect to the peripheral surface of the plate cylinder. In addition to being free, the guide rollers and the press rollers were supported by this plate holding device.

[Work]

When mounting the plate, stop the plate cylinder so that the plate fixing surface of the one end fixing device of the printing plate is located almost on the tangent line of the guide roller, open the fixing surface and insert one end of the plate into this opening. To do. In this case, if the plate is inserted while slidingly contacting the guide roller, the insertion is easy. After insertion, when the plate fixing surface is closed and the plate cylinder is rotated, the plate is guided to the other end fixing device while being pressed against the peripheral surface of the plate cylinder by the guide rollers and inserted into the opening.
This plate is wound by the guide rollers while being pressed against the outer peripheral surface of the body, and is inserted into the opening by the holding roller in the attached state. Therefore, the plate closely adheres to the outer peripheral surface of the body and is easy to insert.

Further, in the case where a plate holding device is provided and the guide roller and the holding roller are supported by the plate holding device, the guide roller and the holding roller are stored together with the plate holding device at a great distance from the plate cylinder during the printing operation. Therefore, inspection, maintenance work and ink replacement work are easy.

〔Example〕

1 to 12 show an example in which the plate cylinder holding device according to the present invention is applied to an automatic plate changing device. FIG. 1 is a plan view of a plate cylinder carrying this, and FIG. 2 is FIG. II-II sectional view of
3 is a sectional view taken along the line III-III in FIG. 1, and FIG. 4 is a line IV in FIG.
-IV sectional view, FIG. 5 is a sectional view taken along line VV of FIG. 1, FIG. 6 is a longitudinal sectional view of the butt plate vice in front of the plate gripper, and FIG. 7 is a side view of the plate vice opening / closing device. 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. 10 is a side view of the plate holding device. FIG. 12 is a schematic side view of the entire plate changing apparatus embodying the present invention, and FIGS. 12A to 12H are schematic side views of the entire plate changing apparatus and essential parts shown for explaining the plate changing operation. Is. In the figure, a notch 2 having a substantially rectangular cross-section is provided on the outer peripheral portion of the plate cylinder 1 over the substantially entire length of the cylinder, and saddle-shaped saddles are provided at both ends of the notch 2. Guides 3 and 4 formed on the bottom are bolted to the bottom surface of the notch. The gripping side plate vise as a one-end fixing device generally designated by reference numeral 5 is provided with a vise base 6 having a substantially square cross section and extending in the trunk axis direction. Part 6a
Is fitted in the left and right guides 3 and 4 with its vertical movement restricted and a slight movement in the circumferential direction. In addition,
The vise table 6 has its middle portion slidably pressed by a plurality of guides (not shown) fixed to the bottom surface of the notch 2 to restrict its lift. A screw hole 6b whose cross section is shown in FIG. 4 is provided at a plurality of positions in the longitudinal direction of the vise table 6, and the tip of the screw hole 6b is tapered so that an adjusting screw 7 can be screwed into the screw hole 6b. In the pin hole corresponding to the adjusting screw 7, a flanged pin 8 having a flange portion engaged in the gap between the vise table 6 and the wall surface of the notch 2 is provided with a tip of the adjusting screw 7. It is slidably inserted in contact with the tapered surface. Thus, when the adjusting screw 7 is rotated, the vise table 6 is moved and adjusted by a small amount in the circumferential direction by the action of the tapered surface. 5 is provided between the stud 10 on the vise table 6 side 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 holding plate holders 11 shown in FIG. 5 are fixed to the vise table 6 at a plurality of inclined surfaces with bolts 12 and 13,
On the pin 11a that horizontally projects from the holding plate holder 11, a holding plate 14 having the same length as the vise table 6 and divided into three in the axial direction of the body is swingable. It is supported, and its gripping surface 14a faces the gripping surface of the vise table 6. Although not shown, a plurality of ridges are formed on the gripping surface 14a and engage with concave grooves on the opposing gripping surface. A plurality of studs 15 whose cross section is shown in FIG. 2 are arranged on the bottom surface of the vise table 6 so as to be juxtaposed in the body axis direction so as to project into the recessed holes 2a of the cutout 2. A compression coil spring 17 that urges the holding plate 14 in a direction in which the holding surface 14a is closed is interposed between the spring receiving pin 16 screwed into the screw hole and the lower end concave hole of the holding plate 14. .

On the other hand, in the center of the bottom surface of the notch 2, a plurality of bearings 18 formed in a rectangular parallelepiped are fixed in parallel with each other in the body axis direction with bolts, and these bearings 18 have a hexagonal cross section. 19
Is rotatably supported by fitting a circular cross section, and a plurality of plate holding cams 20 having a large diameter portion and a small diameter portion are arranged on the cam shaft 19 in parallel in the axial direction. And is pivoted. And the cam surface of each edition gripper cam 20 is each gripper plate 14
Of the plate holding cam 20 against the elastic force of the compression coil spring 17 by rotating the cam shaft 19 by a driving device described later. The holding surface 14a is opened by swinging it counterclockwise in the figure.

A bottom side plate vise 30 as a device for fixing the other end of the plate, which is provided in the notch 2 in parallel with the holding side vise 5, is formed to have a length approximately the same as the body length and a vertical surface bearing 18 The spring bearing bar 31 attached to the vertical surface of the
Are fixed to the bottom surface of the notch 2 by a plurality of bolts 32. The spring receiving bar 31 has a restriction surface 31a extending in the radial direction of the plate cylinder 1. Between the restriction surface 31a and the wall surface 2b of the cutout 2, a support shaft 33 connects both ends of the plate cylinder 1 to both ends. The vise base 35 and the gripper plate 36, which are extended in close proximity to the disc-shaped bearer 34 and are divided into three parts in the cylinder axis direction, are the plate cylinder 1
Face the holding surfaces 35a, 36a extending in the radial direction of
The support shaft 33 is swingable about the counter gripping surface side so that the gripping surfaces 35a, 36a are separated and approached. 37 is an adjusting screw for connecting the three divided vise bases 35, and the right-hand screw and the left-hand screw are screwed into the screw holes of the respective vise bases 35, respectively. The gap between both vise stands 35 is adjusted by inserting a tool into the hole of the collar portion 37a integrally formed at the position and rotating the tool.

In the recess 2c formed on the wall surface 2b of the notch 2, a cam 38 formed in a rod shape with a flat small-diameter portion 38a and an arc-shaped large-diameter portion 38b is rotatably attached to the bearer 34. Is supported,
The protruding portion 38c from the bearer 34 is formed in a hexagonal shape. Further, 40 is a guide for guiding the rotation of the cam 38, which is fixed to the recess 2c of the notched wall surface 2b by a bolt 41. Further, these vise bases 35 are provided between the bottoms of the plurality of spring holes formed in the end of the vise base 35 on the side opposite to the gripper and the bottoms of the plurality of spring holes formed in the spring receiving bar 31. A compression coil spring 42 for urging the spring receiving bar 31 and the spring receiving bar 31 from each other is interposed, and the double nut 4 is slidably provided in a spring hole 31b in the upper portion of the spring receiving bar 31.
The flange of the spring shaft 44 whose movement end is regulated by 3 and the spring hole 31b
A compression coil spring 45 for urging the holding plate 36 in a direction of separating the holding plate 36 from the spring receiving bar 31 is mounted between the bottom surface and the bottom surface. A compression coil spring 46 that biases the vise table 35 in a direction of separating the vise table 35 from the holding plate 36 is loaded in the spring hole above the vise table 35. Reference numeral 47 is a blanket cylinder that contacts the plate cylinder 1.

Next, an opening / closing drive device for rotating the cam shaft 19 and the cam 38 to open / close the plate holding surface will be described. The opening / closing drive devices are provided in the vicinity of the left and right frames 50 that pivotally support the plate cylinder 1 and the blanket cylinder 47, respectively. However, in FIG. 1, it is on the left side for convenience of drawing.) Of the frame 50 side will be described. On the upper end surface of the frame 50, an air cylinder 51 as a driving device is mounted on the bracket.
The camshaft 19 on the gripping side and the cam 38 on the rear side are provided with a lever 53 and a lever 54 between the bearer 34 and the frame 50. It is fixed by split tightening and these levers 53 and 54 and the air cylinder 5
Between 1 and 1, a link mechanism generally designated by reference numeral 55 is provided. That is, the piston rod of the air cylinder 51
The tip end of the rod 57 connected to 56 is pivotally attached to the free end of an L-shaped lever 59 rotatably supported on the upper surface of the frame 50 via a bracket 58, and the other end of the L-shaped lever 59. The lower end of the rod 60, the upper end of which is pivotally attached to the free end of, is pivotally attached to the free end of a lever 62 pivotally supported by a stud 61 on the frame 50 side. 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 by axial movement between the left and right frames. The lever 66 is movably supported, and the free end of the lever 66 is pivotally attached to the center of the roller lever 64. That is, the lever 63, 66, and the roller lever 64 form a four-bar link, and the roller lever 64 swings when driven by the air cylinder 51 side, so that the roller lever 64 is moved to the lever 6.
It is configured to move forward and backward in the radial direction of the plate cylinder 1 together with 3,66. A roller 67, which selectively corresponds to one of the levers 53 and 54 in accordance with the rotational phase of the plate cylinder 1, is pivotally attached to the tip of the roller lever 64.
Is moved forward and backward, the lever 53 or the lever 54 swings within a range shown by a solid line and a chain line in the figure so that the cam shaft 19 or the cam 38 rotates.

In the device on the right side, 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 tail side plate vise.
It is configured to open the plate holding side of 30 plates.

Further, an opening / closing drive device (not shown in FIG. 7) having the same structure as the above is also provided on the frame side on the left side (hereinafter simply referred to as the left side; right side in FIG. 1) of the sheet feeding device. From the air cylinder 51 to the rollers 67, the driving device has the same structure as that shown in FIG.
Only the levers 53 and 54 are different. That is, in FIGS. 1 and 7, the levers 53, 54 on the right side direct their tips from the cam shaft 19 and the cam 38 toward the upper side in the figure, but in the opening / closing drive device on the left side in FIG. Reference numeral 53A,
A lever 54A directs the tip from the cam shaft 19 and the cam 38 downward in the drawing. That is, the tip end portion of the left gripper lever 53A and the tip end portion of the right tail end side lever 54 are configured to have the same phase in the circumferential direction and simultaneously face the rollers 67 on both sides. By doing so, when the left and right air cylinders 51 are simultaneously actuated and the lever 54 is pushed by the roller 67 on the right side, the plate holding surface of the butt side plate vise 30 is opened and at the same time the lever 53A is pressed by the roller on the left side. The lever 53 on the right side is moved to the chain line position so that the plate holding surface of the holding side plate vise 5 is opened.

A reference numeral 70 in FIG. 11 is a cover that covers the front side of the peripheral surface of the plate cylinder 1 over the entire length, and is an L-shaped lever pivotally supported by a bracket 71 on the upper end surface of the frame 50.
The L-shaped lever 72 is pivotally attached to the free end of 72, and the piston rod 74 of the air cylinder 73 is pivotally supported on the frame 50 side.
The working end of is pivotally attached. By doing so, the air cylinder 73 is operated by a command from the control device to open and close in the range shown by the solid line and the chain line in the figure.

The plate vise device and the opening / closing device thus constructed are provided with a plate changing device for exchanging the used old plate with the new plate to be used. I.e. frame 50
A pair of left and right brackets 81 is fixed obliquely above the plate cylinder 1 and fixed to the upper and rear portions of the left and right frames 80 provided in the printing units adjacent to the front of the plate 81. A loader 83 as a printing plate holding member, which is formed in a horizontally long rectangular shape having a length substantially the same as the plate cylinder 1 in a front view, is fixed to the swinging support shaft 82 supported by the base end portion of the swinging support shaft 82. It is movably installed. On the other hand, on the left and right frames 80,
The air cylinder 84 connected to the control device
Is pivotally supported in the vicinity of the lever, and at the working end of its piston rod 85, a lever pivotally attached to the frame 80 side.
86 and a lever 87 pivotally attached to the loader 83 side are pivotally attached. As a result, when the piston rod 85 of the air cylinder 84 advances and retracts, the loader 83 is moved through the levers 86 and 87.
Is oscillated and oscillates between a drooping posture shown by a solid line in the figure and a tilting posture shown by a chain line, and the leading end portion moves in a perspective direction with respect to the peripheral 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 an inlet portion formed in a V shape are vertically extended, and between the guide plates 88. The butt side version vise 30
The plate 89, which is released from the grip when it is opened and then rewound by the rotation of the plate cylinder 1, enters in the direction of the arrow. On the other hand, on the upper end of the loader 83, a plurality of brackets 90, each of which has two oval shapes, is one set.
Is fixed to a tubular swing support shaft 82, and is provided at a position that divides the loader 83 into approximately three equal parts in the axial direction, and a convex 91 is supported by the bracket 90 of each set. The convex 91 is provided with a strip-shaped leaf spring 92 which is biased by a spring force in the winding direction, and a plate-butt end holding device generally indicated by reference numeral 93 is fixed to the rewinding end portion of the leaf spring 92. There is. This plate edge holding device 93 includes a holder 94 at the end of the leaf spring 92.
An L-shaped plate hook 95 pivotally supported on the plate is urged by a torsion coil spring 96 so as to be in an upright posture shown by a solid line, and a hook-shaped portion of the plate hook 95 is provided. The bent end of the plate 89 that has entered between the guide plates 88 is hooked. That is, prior to the start of the plate replacement work, the entire plate edge holding device 93 is manually pulled down to the central standby position of the loader 83 together with the leaf spring 92, and the air cylinder 97 provided at this standby position.
The plate rod 95 is opened so as to occupy the chain line position against the elastic force of the torsion coil spring 96 by moving the piston rod 98 of the plate forward with the push button operation. When the plate edge holding device 93 is pressed against 99, the entire plate edge holding device 93 is structured so as to be stopped from rising against the tensile force of the leaf spring 92. Reference numeral 100 denotes a sensor including a light emitter and a light receiver, which is provided in the vicinity of the air cylinder 97, and detects the tip of the plate 89 that has entered between the guide plates 88 by this, and the piston rod 98 of the air cylinder 97 is detected.
Is retracted and the plate hook 95 is erected 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 boulder 94 is released from the lock, and the tension of the leaf spring 92 raises the entire plate edge holding device 93 together with the plate 89. The 89 is configured to be drawn into the loader 83 and stored. Further, in the pin hole of the block 101 provided at the upper end of the loader 83 corresponding to the plate hook 95, the pin 102 is urged by the compression coil spring 103 in the direction of coming out of the block 101 and slidably supported. By pushing this pin 102 against the elastic force of the compression coil spring 103, the upper end of the plate hook 95 is pushed and tilted as shown by the chain line, and the bent portion of the plate 89 is held. It is configured to release and allow removal from the loader 83.

Next, the plate feeding device will be described. On the surface of the loader 83, a plurality of groups, each of which is connected to a suction air source and holds the new plate 105 to be supplied to the plate cylinder 1 instead of the old plate 89 by suction, in this embodiment, three stages (middle stage) (Not shown) is provided with a suction pad 104, of which the lower suction pad 104 is formed so as to be vertically movable. That is, a pair of left and right air cylinders 106 are supported on both side plates of the loader 83 via brackets 107 above the suction pad 104 of the home electric appliance.
Are mounted in parallel on a bar 109 whose both ends are fixed to the piston rod 108, and the bar 109 holding the new plate 105 is shown by a chain line from the position shown by the solid line in the figure by the piston rod 108 moving forward. It is configured to move to a position and supply the new plate 105 to the gripper plate vise 5 which is open facing the tip thereof. 110 is fixed to the left and right side plates of the loader 83 and meshes with the pinions 111 at both ends of the bar 109 and the bar 10.
It is a rack that facilitates the retreat of 9. In addition, 112 is slidably fitted in a pin hole of another bar 113, and the compression coil spring 1
A reference pin that is biased in the protruding direction by 14 and fits into the reference hole of the new plate 105 to position this new plate 105.

On the other hand, an arm shaft 115 is rotatably supported between both side plates at the lower end of the loader 83, and a pair of left and right arms 116 is fixed to both side protruding parts of the arm shaft 115 from the loader 83. ing. Between the free ends of these arms 116,
A roller shaft 117 is fixedly supported, and on the roller shaft 117, a plurality of pressing rollers 118 formed of, for example, rubber or brush are rotatably arranged side by side. The lever 123 is fixed to the working end of the piston rod 121 of the air cylinder 120, which is fixed to one end of the loader 83 in the width direction via the bracket 119, via the connecting plate 122.
At the lower end of 3, the lever 12 fixed to the arm shaft 115 is
The free end of 4 is pivotally attached. By doing so, when the piston rod 121 of the air cylinder 120 advances and retracts, the arm 116 is configured to rotate between the storage position shown by the solid line in FIG. 9 and the use position shown by the chain line. In the use position shown by the chain line, the pressing roller 118 is the new plate 1 on the plate cylinder 1.
It is configured to be pressed against 05 to bring the new plate 105 into close contact with the peripheral surface of the plate cylinder 1, and to insert the bent end of the new plate 105 into the open rear plate vise 30. Further, on the arm shaft 115, a new plate 105 is supplied to the plate vise 5.
A plurality of guide rollers 125 formed of, for example, rubber or a brush are provided side by side so as to guide the sliding contact. 126 is plate cylinder 1
It is an adhering roller of an inking device which is in contact with the upper plate surface and adheres ink to the plate surface, and is generally provided with four or more rollers.

The respective devices configured as described above and, for example, a servo motor that rotates the plate cylinder 1 are connected to a control device (not shown), and are configured to operate at a predetermined timing.

The operation of the plate changing device having the plate holding device as described above will be described. During the printing operation, as shown in FIG. 12 (a), the loader 83 is suspended from the swing support shaft 82. In this state, the new plate 105 is attracted to the suction pads 104 of a plurality of stages and the reference holes are formed. By being fitted to the reference pin 112, it is positioned and mounted on the loader 83. Further, when the plate edge holding device 93 in the loader 83 is manually pushed down and the air cylinder 97 is operated by a push button operation, the piston rod 98 advances and pushes the plate hook 95, so the plate hook 95 is shown in FIG. It is tilted and opened as shown by the chain line.

When the old version 89 is replaced with the new version 105 after the printing work is completed, when the start button is pressed, the air cylinder 73 is actuated, and the cover 70 is moved through the L-shaped lever 72 as shown by the chain line in FIG. At the same time as opening, the air cylinder 84 operates and the loader 83 tilts to the plate exchange position shown in FIG. 12 (b) via the levers 86 and 87. Also, the servo motor rotates and the plate cylinder 1
Is rotated by a predetermined angle until it occupies the plate ejection position. In this case, as shown in Fig. 12 (c) and Fig. 9, the rear side plate vise
30 faces the tip of the loader 83, and the roller 67 on the right side faces the tip of the lever 54 on the camshaft 38 as shown in FIG. Further, the tip end of the left roller faces the lever 53A on the cam shaft 19 in the same phase as the lever 54, and the left and right air cylinders 51 operate simultaneously in this state. Hand side vise 5 and hip side vise 30
And open at the same time.

In this state, the rigidity of the old plate 89 causes the rear end to protrude from the rear plate vise so that the guide 13 shown in FIG.
At 0, the plate cylinder 1 then rotates in the direction opposite to the arrow in FIG. 9, so that the trailing side of the old plate 89 enters between the guide plates 88 of the loader 83. When the old version 89 that entered enters the sensor 100,
The sensor 100 detects this and operates the air cylinder 97 to retract the piston rod 98, so that the plate hook 95 stands up as shown by the solid line in FIG. As a result, plate printing 95
Hooks the bent edge of the old version 89,
Since the lock of 94 is released, the entire plate edge holding device 93 rises by the tensile force accumulated in the leaf spring 92 provided in the convex 91, and the old plate 89 held by the plate hook 95 is drawn into the loader 83. Will be stored. FIG. 12D shows a state in which the old version 89 is being discharged.

When the plate discharge is completed in this way, the servo motor is actuated to rotate the plate cylinder 1 slightly, and the open plate holding surface of the plate-side plate vise 5 is held by the loader 83 as shown in FIG. While stopping at the position on the extension line of the new plate 105, the air cylinder 106 operates and the bar 109 descends while rotating the pinion 111 on the rack 110, so that the new plate 105 held by the lower suction pad 104 is , And descends while being guided by slidingly contacting the guide roller 125 whose peripheral surface faces the moving path, and the new plate 105 is inserted into the grip plate vice 5 at its grip side end. At this time, the lever 53 shown in FIG.
When the air cylinder 51 is activated, the lever
The camshaft 19 rotates together with 53, and the new plate 105 is gripped by the vise 5 on the gripper side. FIG. 12 (e) shows this state.

In this state, the servo motor rotates to rotate the plate cylinder 1 in the direction of the arrow, and the new plate 105 is wound around the peripheral surface of the plate cylinder 1 so that its rear side bent end corresponds to the press roller 118. Stop. When rotating the plate cylinder 1, the guide rollers 125 are
Since the new plate 105 rotates while being pressed against the surface of 05, the new plate 105 comes into close contact with the peripheral surface of the plate cylinder 1. After that, the air cylinder 120 operates and the piston rod 121 retracts, the arm 116 rotates via the levers 123 and 124, and the pressing roller 118 formed of rubber, brush or the like is pressed against the peripheral surface of the plate cylinder 1, As a result, the bottom end of the new plate 105 is bent by the presser roller 118.
Inserted in 30. In this case, the bent end of the new plate 105 on the butt side correctly corresponds to the opening portion of the vise on the butt side plate and is surely held. 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 the plate cylinder 1 is stopped after the rotation. When the rear end of the new plate 105 is inserted into the rear plate vise 30, the left air cylinder operates and the roller pushes down the lever 54A, so that the cam 38 rotates to close the rear plate vise 30. Hold the insertion end of the new edition 105. At the end of the rotation of the cam 38, the vise base 35 and the gripper plate 36 move integrally in the circumferential direction of the plate cylinder 1, so that the new plate 105 is stretched and adheres closely to the peripheral surface of the plate cylinder 1. To do.

After that, the air cylinder 120 is operated to store the presser roller 118, and then the piston rod 85 of the air cylinder 84 retracts to pull the levers 86 and 87, so that the loader 83 moves as shown in FIG. 12 (h). Since the cover 70 is closed by the operation of the air cylinder 73, the printing operation can be resumed.

After restarting the printing operation, when standing in front of the loader 83 and pressing the pin 102 at an appropriate time, the plate holder 95 tilts to release the old plate 89 from holding, so that the old plate 89 can be taken out from the loader 83. In addition, as described above, the new plate 105 can be mounted and prepared on the loader 83 during the printing operation. Since the loader 83 and the press roller 118 are stored, the space between the printing units in this state is not reduced.

Although the present embodiment shows an example in which the present invention is applied to the automatic plate changing device, the present invention is not limited to this, and it may be operated by a push button operation or the like. Further, this embodiment shows an example in which the present invention is applied to a sheet-fed printing press, but it is needless to say that it can be applied to a web-fed rotary printing press and has the same effect.

〔The invention's effect〕

As is apparent from the above description, according to the present invention, in the printing machine, the plate is always contacted with the peripheral surface of the plate cylinder and is positioned corresponding to the fixing device at the time of inserting the plate into the fixing device. A guide roller that guides the plate when it is inserted into the fixing device and that makes the plate adhere to the plate cylinder when the plate is wound around the plate cylinder, and a guide roller that is detachably supported on the peripheral surface of the plate cylinder. When the plate is inserted, it is positioned corresponding to this fixing device, and while the plate is in close contact with the plate cylinder by the guide rollers, the other end of the plate is inserted into this fixing device so that it is opposed to the peripheral surface of the plate cylinder. By providing the press roller that contacts, when inserting the printing plate into the plate cylinder when inserting the printing plate into the one end fixing device, the printing plate is inserted while slidingly contacting the guide rollers, which facilitates insertion. It is possible to improve productivity and reduce labor. Further, since the printing plate wound around the peripheral surface of the plate cylinder and guided to the other end fixing device is wound while being pressed against the peripheral surface of the plate cylinder by the guide rollers, the printing plate closely adheres to the peripheral surface of the cylinder, Since it is inserted into the other end fixing device with a press roller while being in close contact, the bottom side bent end can correctly correspond to the opening of the other end fixing device without loosening the plate, and it can be held easily and correctly. The print registration accuracy is improved.

Further, a plate holding device for holding the plate is provided, and with the plate holding device supported obliquely above the plate cylinder, the front end of the plate holding device moves forward and backward with respect to the peripheral surface of the plate cylinder. In addition to being flexible, the guide rollers and presser rollers are supported by this plate holding device, so the guide rollers and presser rollers are stored far away from the plate cylinder during printing work, so inspection and maintenance work and ink replacement are possible. Work becomes easier and workability is improved. Further, the plate holding device is kept in a state of being supported obliquely above the plate cylinder when the front end of the plate is moved forward and backward with respect to the peripheral surface of the plate cylinder. Since it is not necessary to secure a place for placing the plate holding device and the plate holding device is supported by the fixing member, its mounting is also easy.

[Brief description of drawings]

1 to 12 show an embodiment of an apparatus for mounting a printing plate on a plate cylinder according to the present invention. FIG. 1 is a plan view of a plate cylinder which implements this, and FIG. 2 is II- of FIG. II cross section, Fig. 3 is of Fig. 1
III-III sectional view, FIG. 4 is IV-IV sectional view of FIG. 1, 5
1 is a sectional view taken along line VV of FIG. 1, FIG. 6 is a longitudinal sectional view of the plate-side plate vise before the plate is held, FIG. 7 is a side view of the plate vise opening / closing device, and FIG. 8 is a plate holding device. A partially broken side view of the upper half of the device,
FIG. 9 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, and FIG. 11 is a schematic side view of the entire plate changing device embodying the present invention. 12 (a) to (h) are schematic side views of the entire plate changing device and the essential parts shown for explaining the plate changing operation. 1 ... plate cylinder, 2 ... notch, 5 ... grip plate vice, 30
…… Buddle version vise, 82 …… Swing support shaft, 83 …… Loader, 105
…… New edition, 116 …… Arm axis, 117 …… Roller axis, 118 ……
Presser roller, 120 …… air cylinder, 125 …… guide roller.

Claims (2)

(57) [Claims] 1. A printing plate, one end of which is fixed to a device for fixing one end of a printing plate provided in an outer peripheral cutout of a plate cylinder, is wrapped around a cylinder peripheral surface, and the other end of the printing plate is placed in the outer peripheral cutout. In a plate mounting device for a plate cylinder to be fixed to the other end fixing device, the plate plate is always in contact with the peripheral surface of the plate cylinder and positioned corresponding to the plate fixing device when the plate is inserted into the one end fixing device. And a guide roller that guides the plate when the plate is wound around the plate cylinder, and that guides the plate closely to the plate cylinder when the plate is wound around the plate cylinder, and is detachably supported on the peripheral surface of the plate cylinder. When the plate is inserted into the edge fixing device, it is positioned corresponding to this fixing device, and the other end of the plate is inserted into this fixing device while the plate is brought into close contact with the plate cylinder by the guide rollers. An apparatus for mounting a printing plate on a plate cylinder, characterized in that a press roller that is in contact with the peripheral surface of the plate cylinder is provided. 2. A plate mounting apparatus for a plate cylinder according to claim 1, wherein a plate holding device for holding the plate is provided and the plate holding device is supported diagonally above the plate cylinder. In the state
An apparatus for mounting a printing plate on a plate cylinder, wherein a front end portion of the plate cylinder is movable back and forth with respect to a peripheral surface of the plate cylinder, and the guide roller and the pressing roller are supported by the plate holding device.