JP2867155B2 - Plate supply device to plate cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a plate cylinder for supplying a plate held by a plate holding device to a plate fixing device provided in an outer peripheral notch of the plate cylinder. The present invention relates to a plate supply device.

2. Description of the Related Art A notch having a substantially rectangular cross section over the entire length of a cylinder is provided in an outer peripheral portion of a plate cylinder of a sheet-fed printing press, and a printing plate (hereinafter simply referred to as a plate) is provided in the notch. Plate) that fixes the grip-side end of the plate, and a plate-side vise that fixes the plate-side vice that is fixed to this and then fixes the tail-end of the plate that is wound around the trunk surface. A fixing device is fixed to the bottom surface of the notch and extends in the trunk axis direction.

The conventional vise on the grip side and the rear side of the vise are formed by a long vise table extending in the body axis direction, and pivotally supported by a plurality of bolts at the edge of the vise table. It comprises a plurality of gripping plates that open and close by movement to hold and release the plate between the vise table, and a plurality of cams that engage with the edge notches of each of the gripping plates, The plurality of cams are fixed in parallel on a rotatable cam shaft. Further, a plurality of compression coil springs for urging the gripper plate in the opening direction are interposed between the vise table and the gripper plate.

With this configuration, when the plate is held, when the cam shaft is rotated, the holding plate divided into a plurality of pieces in the body length direction is released from the engagement of the cam and the compression coil spring is moved. Because the springs open at the same time, insert the edge of the plate between the gripper plate and the vise table, and then rotate the cam shaft in the opposite direction to the previous one. Swings and closes against the resilience of the plate, and holds the edge of the plate.

Further, for example, the apparatus disclosed in Japanese Patent Application Laid-Open No. 1-127346 is designed such that the rear side gripping surface of the plate, which is conventionally formed in the circumferential direction of the plate cylinder, is formed in the radial direction of the plate cylinder. A power platform 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 butt-side end of the plate, with the gripper side edge held in the mouth and wrapped around the body circumference, has the bent part inserted between the vise stand and the gripper plate, and the cam mechanism swings the gripper plate. By moving the plate, the bent end of the plate is held, and thereafter, by moving the entire back-side plate vise in the circumferential direction, the plate is uniformly stretched and closely adhered to the body circumferential surface.

However, in such a conventional plate-mounting device for a plate cylinder, it is difficult to insert a plate into an opening having a narrow vise on the gripping side plate. It is difficult to insert the plate buttocks bent at a right angle into the opening of the buttocks version vise because the plate that leads to the buttocks version vice while winding on it does not adhere to the peripheral surface of the plate cylinder However, there is a problem that it takes more time and the burden of labor increases.

Therefore, conventionally, there has been proposed an apparatus for supplying a plate to a plate cylinder as disclosed in, for example, JP-A-58-187355. This printing plate supply device has an arm to which a suction pad is fixed at the front end, and a plate side holding hook and a tail side hook are provided on the plate cylinder side.

In the apparatus configured as described above, when the plate is mounted on the peripheral surface of the plate cylinder, the arm on which the plate is sucked by the suction pad is placed between the place where the plate is placed and the holding hook on the outer periphery of the plate cylinder. After moving and hooking the bent end of the plate on the holding side hook, this plate is wound around the body peripheral surface, and the other end bent portion of the plate is hooked on the buttocks side hook in the same manner as described above. .

[Problems to be solved by the invention]

However, in such a conventional apparatus, since the bent end of the plate is hooked on the hook on the plate cylinder side as described above, it is difficult to stretch the plate so as to be in close contact with the peripheral surface of the cylinder. In addition, there is a problem that the structure is complicated.

[Means for solving the problem]

In order to solve such a problem, in the present invention, the plate fixing surface of the plate fixing device provided in the outer peripheral notch of the plate cylinder is formed so as to extend in the axial direction of the plate cylinder, and the outer side of the plate cylinder is formed. A plate holding device having a surface substantially flush with the plate fixing surface, a reference pin engaging with a reference hole on the plate side is provided on the surface of the plate holding device, and the plate holding device is provided on the plate holding device. A suction conveyance member for feeding the plate in substantially the same direction as the plate fixing surface of the plate fixing device is provided.

(Operation)

Prior to mounting the plate on the plate cylinder, the plate is sucked by a large 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 of the plate holding device to determine the position. The plate cylinder is stopped by rotating the plate cylinder so that the plate holding surface of the vice on the holding side is positioned substantially on the extension line of the suction pad. Then, when the grip surface is opened and the holding member holding the suction pad is moved in the plate cylinder direction, the grip side end of the linearly formed plate is inserted into the open plate grip surface. When the gripper is closed, one end of the plate is added to the gripper vise. Then, when the plate cylinder is rotated about one turn, the buttocks end of the plate faces the plate holding surface of the open plate vise, and the presser roller contacts the plate holding surface of this plate vise. Since the other end of the plate is inserted, the plate is mounted by closing the grip surface. Thereafter, when the butt-side vice is moved in the circumferential direction of the plate cylinder, the plate vise is stretched and adheres to the circumferential surface of the drum. In this case, since both ends of the plate are strongly attached to the plate vise, the plate vise can be sufficiently extended.

〔Example〕

1 to 12 show an embodiment in which the plate 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 in which the plate holding device is implemented, and FIG. 2 is FIG. II-II sectional view of
FIG. 3 is a sectional view taken along the line III-III of FIG. 1, and FIG.
-IV sectional view, Fig. 5 is a VV sectional view of Fig. 1, Fig. 6 is a vertical sectional view of the vice side vise before the plate is held, Fig. 7 is a side view of the plate vise 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, FIG. 10 is a side view of the plate holding device, FIG. FIG. 12 is a schematic side view of the entire plate changing apparatus embodying the present invention, and FIGS. 12 (a) to 12 (h) are schematic side views of the entire plate changing apparatus and main parts for explaining the plate changing operation. It is. In the figure, a notch 2 having a substantially rectangular cross section is provided on an outer peripheral portion of a plate cylinder 1 over substantially the entire length of the cylinder. Guides 3 and 4 formed in the notch are bolted to the notch bottom surface. The grip-side vise, generally designated by the reference numeral 5, includes a vise table 6 having a substantially square cross section and extending in the axial direction of the plate cylinder 1, that is, in the coaxial direction. Thin section at both ends
The left and right guides 6a are fitted to the left and right guides 3 and 4 while being restricted from moving up and down and being allowed to move slightly in the circumferential direction. The vise table 6 is slidably pressed at the intermediate portion thereof by a plurality of guides (not shown) fixed to the bottom surface of the notch 2 so as to restrict the floating. At a plurality of locations in the longitudinal direction of the vise 6, a screw hole 6b whose section is shown in FIG.
An adjusting screw 7 having a tapered end is screwed into the screw hole 6b. A pin hole corresponding to the adjusting screw 7 has a flange formed by notching the vice table 6 with the vise. A flanged pin 8 engaged in a gap with the wall surface of the adjusting screw 7 has its tip abutted on the tapered surface of the adjusting screw 7 and is slidably inserted. 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.

An L-shaped holding plate holder 11 shown in FIG. 5 is fixed to bolts 12 and 13 at a plurality of inclined surfaces of the vise 6.
A pin 11a protruding horizontally from the holding plate holder 11 is provided with a holding plate 14 having the same length as that of the vise table 6 and having a substantially C-shaped cross section divided into three in the body axis direction. It is supported, and its gripping surface 14 a faces the gripping surface of the vise table 6. Although not shown, a plurality of ridges are formed on the grip surface 14a, and are engaged with the concave grooves on the opposed grip surface. On the bottom surface of the vise 6, a plurality of studs 15 whose sections are shown in FIG. 2 are planted in parallel in the body axis direction and project into the recesses 2a of the notches 2. Between the spring receiving pin 16 screwed into the screw hole and the lower end concave hole of the gripper plate 14, a compression coil spring 17 for urging the gripper plate 14 in the direction in which the gripper surface 14a closes is interposed. .

On the other hand, a plurality of bearings 18 formed in a rectangular shape are fixed in parallel with each other in the body axis direction by bolts at the center of the bottom surface of the notch 2, and these bearings 18 have camshafts having 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. It is attached to the shaft. The cam surface of each plate holding cam 20 is held by each holding plate 14
When the cam shaft 19 is rotated by a driving device to be described later, the large-diameter portion of the plate-holding cam 20 pushes the holding plate 14 against the elastic force of the compression coil spring 17. It is configured to swing in the counterclockwise direction in the figure to open the gripping surface 14a.

Inside the notch 2, a rear side vice indicated by reference numeral 30 is provided in parallel with the grip side vise. This butt side vise
30 is formed to be approximately the same length as the trunk length and has a vertical surface bearing 18
The spring receiving bar 31 is fixed to the bottom surface of the notch 2 by a plurality of bolts 32. The spring receiving bar 31 has a regulating surface 31 a extending in the radial direction of the plate cylinder 1.
A support shaft 33 extends between the notch 2a and the wall surface 2b of the notch 2 with both ends proximate to the disk-shaped bearers 34 at both ends of the plate cylinder 1. Each support shaft 33 is divided into three parts in the body axis direction. The fulcrum 35 and the gripper plate 36 are gripping surfaces 35a, 36 extending in the radial direction of the plate cylinder 1.
The support shaft 33 is swingable about the anti-grip surface so that the grip surfaces 35a and 36a are spaced apart and approach each other with the a facing each other. Reference numeral 37 denotes an adjusting screw for connecting the three divided vise stands 35 to each other. A right-hand screw and a left-hand screw are screwed into the screw holes of the respective vise stands 35, and are provided between the two vise stands 35. The tool is inserted into the hole of the integrally formed collar portion 37a and rotated to adjust the distance between the vise stands 35.

In a concave portion 2c formed in 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 mounted on the bearer 34. Is supported,
A protruding portion 38c from the bearer 34 is formed in a hexagonal shape. Reference numeral 40 denotes a guide for guiding the rotation of the cam 38, which is fixed to the recess 2c of the cutout wall surface 2b by a bolt 41. Further, between the bottom surfaces of the plurality of spring holes formed at the opposite end of the vise table 35 and the bottom surfaces of the plurality of spring holes formed in the spring receiving bar 31, these vise tables 35 are provided. A compression coil spring 42 for urging the spring nut and the spring receiving bar 31 in a direction to separate them from each other is provided. The double nut 4 is slidably provided in a spring hole 31b above the spring receiving bar 31.
The flange of the spring shaft 44 whose moving end is regulated by 3 and the spring hole 31b
A compression coil spring 45 for urging the gripper plate 36 in a direction to separate the gripper plate 36 from the spring receiving bar 31 is mounted between the compression coil spring 45 and the bottom surface of the spring. Further, a compression coil spring 46 for urging the vise table 35 in a direction to separate the vise table 35 from the holding plate 36 is loaded in a spring hole above the vise table 35. Reference numeral 47 denotes a blanket cylinder in contact with the plate cylinder 1.

Next, an opening / closing drive device for rotating the cam shaft 19 and the cam 38 to open and close the plate holding surface will be described. The opening / closing drive device is provided near the left and right frames 50 that support the plate cylinder 1 and the blanket cylinder 47 and the like, respectively. However, in FIG. 1, it is on the left side for convenience of drawing.) The frame 50 side will be described. An air cylinder 51 as a driving device is mounted on the upper end surface of the frame 50 by a bracket.
On the other hand, a lever 53 and a lever 54 are positioned between the bearer 34 and the frame 50 on the gripping side cam shaft 19 and the rear side cam 38, The levers 53 and 54 and the air cylinder 5
A link mechanism generally denoted by reference numeral 55 is provided between the link mechanism 1 and the link mechanism 1. That is, the piston rod of the air cylinder 51
The distal end of a rod 57 connected to 56 is pivotally attached to the free end of an L-shaped lever 59 rotatably supported via a bracket 58 on the upper surface of the frame 50. The lower end of the rod 60 whose upper end is pivotally connected to the free end of the lever 60 is pivotally connected 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 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 the left and right frames so that the movement in the axial direction is regulated. The lever 66 has a lever 66 that is restricted from moving in the axial direction and rotates. The free end of the lever 66 is pivotally attached to the center of the roller lever 64. That is, a four-joint link is formed by the levers 63, 66 and the roller lever 64. When the lever 62 is driven by the air cylinder 51 to swing, the roller lever 64 is moved to the lever 6 position.
It is configured to advance and retreat in the radial direction of the plate cylinder 1 with 3, 66. A roller 67, which selectively corresponds to one of the levers 53 and 54 in accordance with the rotation phase of the plate cylinder 1, is pivotally mounted on the tip of the roller lever 64.
The lever 53 or the lever 54 swings within the range indicated by the solid line and the chain line in the drawing, and the cam shaft 19 or the cam 38 rotates.

In the device on the right side, when the lever 53 is at the solid line position, the plate holding surface of the gripping plate vise 5 is closed, and when the lever 54 is at the solid line position, the buttocks plate vise is changed.
It is configured to open 30 plate holding faces.

Further, an opening / closing drive device (not shown in FIG. 7) having the same configuration as that described above is provided on the left frame side (hereinafter, simply referred to as the left side in FIG. 1) as viewed from the sheet feeding device. The drive device has exactly the same configuration as that shown in FIG. 7 from the air cylinder 51 to the roller 67,
Only the levers 53 and 54 are different. That is, in FIGS. 1 and 7, the right levers 53 and 54 have their tips directed upward from the camshaft 19 and the cam 38 in the figure. 53A,
A lever indicated by 54A has its tip directed downward from the camshaft 19 and the cam 38 in the figure. That is, the distal end of the left gripper lever 53A and the distal end of the right tail lever 54A are circumferentially in phase with each other and are simultaneously opposed to the rollers 67 on both sides. Air cylinder 51 operates simultaneously and lever 54 is
When pressed with 67, the plate holding surface of the butt side vise 30 opens, and at the same time, the lever 53A is pressed by the left roller and the right lever 53
Is moved to the dashed line position, and the plate holding surface of the holding side plate vise 5 is opened.

In FIG. 11, reference numeral 70 denotes a cover for covering the entire front surface of the plate cylinder 1 over its entire length, and an L-shaped lever 72 rotatably supported on the upper end surface of the frame 50 via a bracket 71.
The L-shaped lever 72 has a piston rod 74 of an air cylinder 73 pivotally supported on the frame 50 side.
Working end is pivotally mounted. By doing so, the air cylinder 73 is operated by a command from the control device to open and close in a range indicated by a solid line and a chain line in the figure.

The plate vise device and the opening / closing device thus configured are provided with a plate exchange device for exchanging the used plate with a new plate to be used. That is, frame 50
A pair of left and right brackets 81 is fixed to the rear of the upper ends of the left and right frames 80 provided in the printing unit adjacent to the front of the printing unit, at a position obliquely above the plate cylinder 1, and is rotatable around these brackets 81. A loader 83 as a printing plate holding member, which is formed in a horizontally long rectangular shape having substantially the same length as the plate cylinder 1 in a front view, is fixed to the swinging support shaft 82 which is It is provided movably. On the other hand, the left and right frames 80
The air cylinder 84 connected to the control device
Is pivotally supported in the vicinity of the piston rod 85, and a working end of the piston rod 85 has a lever pivotally mounted on the frame 80 side.
86 and a lever 87 pivotally attached to the loader 83 side are pivotally attached. Thus, when the piston rod 85 of the air cylinder 84 advances and retreats, the loader 83 is moved through the levers 86 and 87.
Swings, and swings between a hanging posture indicated by a solid line and a tilting posture indicated by a chain line in the figure, so that the leading end moves in the direction of the distance from 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 a V-shaped entrance portion are extended in the vertical direction. The vice side vise 30
The plate 89 is released from the grip by opening, and the plate 89 which is rewound by the rotation of the plate cylinder 1 enters in the direction of the arrow. On the other hand, at the upper end of the loader 83, a plurality of brackets 90 each of which is formed into a pair of oval-shaped pieces
Are provided at positions that are fixed to the tubular swing support shaft 82 and divide the loader 83 into approximately three equal parts in the width direction, and a convex 91 is supported by the brackets 90 of each set. The convex 91 has a band-shaped leaf spring 92 urged by a spring force in a winding direction, and a plate edge holding device generally indicated by reference numeral 93 is fixed to a rewind end of the leaf spring 92. I have. The plate back holding device 93 includes a boulder 94 at the end of a 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. 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 work of replacing the plate 89, the entire plate edge holding device 93 is manually pulled down to the central standby position of the loader 83 with the leaf spring 92, and the air cylinder provided at the standby position is provided. When the piston rod 98 of the 97 is advanced by a push button operation, the plate hook 95 is opened so as to occupy the chain line position against the elastic force of the torsion coil spring 96, and the holder 94 is held at the upper end of the plate hook 95. By pressing against the cover 99, the entire plate edge holding device 93 is stopped from rising by the pulling force of the leaf spring 92. Reference numeral 100 denotes a sensor comprising a light emitter and a light receiver and provided in the vicinity of the air cylinder 97, and retreats the piston rod 98 of the air cylinder 97 by detecting the tip of the plate 89 which has entered between the guide plates 88. Then, the plate hook 95 is erected by the resilience of the torsion coil spring 96 into a solid line state, the bent end of the plate 89 is hooked on the plate hook 95, the holder 94 is unlocked, and the plate spring 92 is released.
Due to the pulling force, the entire plate edge holding device 93 is raised together with the plate 89, and the plate 89 is drawn into the loader 83 and stored.

Further, a pin 102 is slidably supported by a compression coil spring 103 in a pin hole of a block 101 provided at an upper end portion of the loader 83 corresponding to the plate hanging 95 in a direction in which the pin 102 comes out of the block 101. The pin 102 is connected to the compression coil spring 1
By pushing against the spring force of 03, the upper end of the plate hook 95 is pushed and tilted as shown by the dashed line, the bent part of the plate 89 is released from holding and can be removed from the loader 83 It is configured to be.

Next, the plate feeding device will be described. On the surface of the loader 83, a plurality of stages, each of which holds a new plate 105 which is connected to a suction air source and is supplied to the plate cylinder 1 instead of the old plate 89 by suction, and in this embodiment, three stages (in this embodiment, three stages (Not shown) are provided, and the lower suction pad 104 is formed so as to be movable in the vertical direction. That is, above the lower suction pad 104, a pair of left and right air cylinders 106 is supported on both side plates of the loader 83 via the bracket 107, and the suction pad 104 is
Are mounted side by side on a bar 109 having both ends fixed to the piston rod 108, and as the piston rod 108 moves forward, the bar 109 holding the new version 105 is shown by a chain line from a position shown by a solid line in the figure. The new plate 105 is moved to the position and the new plate 105 is supplied to the holding side plate vise 5 which is open to the front end thereof. 110 is fixed to the left and right side plates of the loader 83, and
9 This is a rack that facilitates retreat. Also, 112 is slidably fitted into the pin hole of another bar 113, and the compression coil spring 1
The reference pin is urged in the protruding direction at 14 and fits into the reference hole of the new plate 105 to position the new plate 105.

On the other hand, an arm shaft 115 is rotatably supported at the lower end of the loader 83, and roller arms 116 are fixed to both side protruding portions of the arm shaft 115 from the loader 83,
A plurality of rollers 118 formed in a brush shape, for example, are rotatably arranged on a roller shaft 117 fixedly supported between the free ends of both arms 116. An operating end of a piston rod 121 of an air cylinder 120 fixed to one end in the width direction of the loader via a bracket 119 is provided with a connecting plate 12.
A lever 123 is fixed through the lever 2, and a free end of a lever 124 fixed to the arm shaft 115 is pivotally attached to a lower end of the lever 123. Thus, when the piston rod 121 of the air cylinder 120 advances and retreats, the arm 116
Pivots between a storage position shown by a solid line in FIG. 9 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 cylinder 1 and the new plate 105 is It is configured such that it is brought into close contact with the peripheral surface and the bent end of the new version 105 is inserted into the open rear version vise 30. Further, on the arm shaft 115, a new version 1 supplied to the version vise 5 is provided.
A plurality of rollers 125 formed, for example, in a brush shape, which guides 05 in sliding contact therewith are arranged side by side. Reference numeral 126 denotes an application roller of an inking device which is brought into contact with the plate surface on the plate cylinder 1 and adheres ink to the plate surface. Generally, four or more rollers are provided.

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

The operation of the plate exchange device provided with the above plate holding device will be described. During the printing operation, as shown in FIG. 12 (a), the loader 83 is suspended from the swing support shaft 82, and in this state, the new plate 105 is sucked by the suction pads 104 in a plurality of stages, and By being fitted to the reference pin 112, it is positioned and mounted on the loader 83. Also, at the same time as manually pushing down the plate discharging gripping device 93 in the loader 83 to the waiting position,
When the air cylinder 97 is operated by a push button operation, the piston rod 98 moves forward and presses the plate hanging 95, and the plate hanging 95 is tilted as shown by a chain line in FIG.
Is pressed against the inner wall surface of the cover 99 of the apparatus main body, so that the entire apparatus is fixed at the waiting position, the plate hanging 95 is opened in a tilting posture, and the hook-like portion at the lower end is opened.

When the old version 89 is replaced with the new version 105 after the printing operation is completed, when the start button is pressed, the air cylinder 73 is operated, and the cover 70 is moved through the L-shaped lever 72 as shown by a chain line in FIG. Upon opening, the air cylinder 84 is operated, and the loader 83 is tilted to the plate exchange position shown in FIG. 12 (b) via the levers 86 and 87. In addition, the servo motor rotates to rotate the plate cylinder 1
Is rotated by a predetermined angle until it occupies the plate discharging position. In this case, as shown in FIG. 12 (c) and FIG.
The roller 30 is opposed to the distal end of the loader 83, and the right roller 67 is in contact with the distal end of the lever 54 on the cam shaft 38 as shown in FIG. In addition, the left roller has a distal end opposed to the lever 53A on the camshaft 19 having the same phase as the lever 54, and in this state, the left and right air cylinders 51 operate simultaneously. Vice-side vise 5 and butt-side vise 30
And open simultaneously.

In this state, due to the rigidity of the old version 89, the buttocks end protrudes from the holding surface of the buttocks version vise 30 where the buttocks version vise 30 is open, and hits the guide 130 shown in FIG. 12 (c). Since the plate cylinder 1 rotates in the direction opposite to the arrow in FIG. 9, the trailing side of the old plate 89 enters between the guide plates 88 of the loader 83. When the inserted end of the old plate 89 that has entered the sensor 100 passes through the sensor 100, the sensor 100 detects this and activates the air cylinder 97 to retract the piston rod 98, so that the plate hook 95 moves as shown by a solid line in FIG. Stand up.

As a result, the plate holder 95 hooks the bent end of the old plate 89 and the support plate 94 is released from being fixed by pressure contact, so that the entire plate discharging gripping device 93 is accumulated in the plate spring 92 provided on the convex 91. 95
Is held in the loader 83 by being retracted. FIG. 12D shows a state in which the old version 89 is being discharged.

When the plate discharging operation is completed in this way, the servomotor operates to slightly rotate the plate cylinder 1, and the open plate holding surface of the holding plate vise 5 is held by the loader 83 as shown in FIG. The bar 109 descends while stopping at a position that is on the extension of the new plate 105 and the air cylinder 106 operates to rotate the pinion 111 on the rack 110, so that the new plate 105 held by the lower suction pad 104 is The new plate 105 descends while being guided while sliding on the rollers 125, and the new plate 105 is inserted into the holding plate vise 5 with its holding side end. At this time, since the lever 53 shown in FIG. 7 faces the roller 67, when the air cylinder 51 operates, the cam shaft 19 rotates together with the lever 53, and
5 is added to the vice 5 on the holding 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 and its rear bent end stops at a position corresponding to the roller 118. I do. When the plate cylinder 1 rotates, the rollers 125 rotate while being pressed against the surface of the new plate 105, so that the new plate 105 comes into close contact with the peripheral surface of the plate cylinder 1. Thereafter, the air cylinder 120 is actuated, the piston rod 121 is retracted, the arm 116 is rotated via the levers 123 and 124, and the brush-like roller 118 is pressed against the peripheral surface of the plate cylinder 1, whereby the bottom of the new plate 105 The side bent end is inserted into the buttocks side vise 30 by rollers 118. FIG. 12 (f) shows a state where the plate cylinder 1 is being rotated, and FIG. 12 (g).
Indicates a state of stopping after rotation. When the trailing end of the new plate 105 is inserted into the trailing vise 30, the left air cylinder operates and the rollers press down the lever 54A. Close and add the insertion end of the new edition 105. At the end of the rotation of the cam 38, the vise table 35 and the holding plate 36 move integrally in the circumferential direction of the plate cylinder 1, so that a new plate 105 is stretched and adheres to the peripheral surface of the plate cylinder 1. I do.

After this, the piston rod 85 of the air cylinder 84 retreats and pulls the levers 86 and 87, so that the loader 83 is turned on as shown in FIG.
As shown in FIG. 7, the cover is closed by the operation of the air cylinder 73, and the printing operation can be resumed.

After resuming the printing operation, standing at the front of the load 83 at an appropriate time and pressing the pin 102, the plate hook 95 tilts to release the old version 89 from holding, so that the old version 89 can be removed from the loader 83. In addition, as described above, the new edition 105 can be mounted on the loader 83 and prepared during the printing operation. Then, the space between the printing units in the state where the loader 83 is stored is not reduced.

In this embodiment, an example in which the present invention is applied to an automatic plate changing apparatus is shown. However, the present invention is not limited to this. The plate holding apparatus may be operated by a push button operation or the like. Further, in the present embodiment, an example in which the present invention is applied to a sheet-fed printing press is shown. However, the present invention can also be applied to a web-fed rotary printing press having a similar printing plate fixing device, and a similar effect can be obtained. Needless to say.

〔The invention's effect〕

As apparent 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 so as to extend in the axial direction of the plate cylinder, and A plate holding device having a surface substantially flush with the plate fixing surface, a reference pin engaging with a reference hole on the plate side is provided on the surface of the plate holding device, and the plate holding device is provided on the plate holding device. By providing the suction conveyance member for feeding the plate in substantially the same direction as the plate fixing surface of the plate fixing device, the structure is simplified as compared with the related art, and the reference hole on the plate side is provided in the plate holding device. The printing plate, which is engaged with the reference pin and whose leading edge is aligned, is always forcibly inserted into the plate fixing surface of the plate fixing device by the suction conveyance member at an optimum conveyance speed, so that the printing plate is placed on the plate fixing surface. It is inserted smoothly and securely. This facilitates the insertion operation and shortens the operation time. In addition, the printing plate mounted on the plate cylinder is firmly attached to the plate fixing surface of the plate fixing device. It can be in close contact with the surface, and the printing register accuracy is improved.

[Brief description of the drawings]

1 to 12 show an embodiment of a plate holding device according to the present invention. FIG. 1 is a plan view of a plate cylinder in which the plate holding device is implemented, and FIG.
The figure is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a sectional view taken along the line III-III in FIG.
FIG. 4 is a sectional view taken along line IV-IV of FIG. 1, and FIG.
FIG. 6 is a vertical sectional view of the vice side vise before the plate is held, FIG. 7 is a side view of the plate vise opening / closing device, and FIG. 8 is an upper half of the plate holding device. 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 plate changing device embodying the present invention. FIGS. 12 (a) to 12 (h) are schematic side views of the entire plate changing apparatus and main parts shown for explaining the plate changing operation. 1 ... plate cylinder, 2 ... notch, 5 ... side plate vise, 30
… Vise on the back side, 82 …… Swing shaft, 83 …… Loader, 104
…… Suction pad, 105 …… New edition, 106 …… Air cylinder,
108 ... Piston rod, 109 ... Bar, 112 ... Reference pin.

Claims (1)

(57) [Claims] A plate fixing surface of a plate fixing device provided in an outer peripheral notch of a plate cylinder is formed so as to extend in an axial direction of the plate cylinder. A plate holding device having substantially the same plane is provided, a reference pin is provided on a surface of the plate holding device to engage with a reference hole on the plate side, and the plate holding device of the plate fixing device is fixed to the plate holding device. A plate supply device for a plate cylinder, comprising a suction conveyance member for feeding a plate in substantially the same direction as a surface.