JPH0560840U - Plate feeding device for printing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a plate supply device for a printing press capable of supplying the plate to the plate vise device with a simple structure in a short time and with high accuracy. There is. [Structure] Outside of the plate cylinder 1, the surface is a plate gripping surface 6c, 1
A loader 83 that is flush with 4a is provided. Loader 83
The reference holes 105d and 105e of the plate 105 and the reference pin 119 of the plate vise 5 and the reference pin 113 occupying the same position in the left-right direction of the plate 105 are provided on the surface of the plate 105. Printing plate 1
A suction head 104 that holds 05 and does not move in the left-right direction of the printing plate 105 is provided, and the suction head 104 is moved by the air cylinder 106 in the radial direction of the plate cylinder 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a printing plate supply device of a printing press for supplying a printing plate held by a printing plate holding device to a plate vise device provided in an outer peripheral cutout of a plate cylinder and holding the plate.

[0002]

[Prior Art]

 The plate cylinder of the sheet-fed printing press has a notch with a rectangular cross section that extends the entire length of the cylinder, and the inside of this notch is on the gripper side of the plate (hereinafter simply referred to as the plate). A plate vise device consisting of a gripping plate vise that holds the edge part and a bottom plate vise that holds the end part of the plate that is wrapped around the body after being gripped by the plate vise device. It is fixed to and is extended in the axial direction of the plate cylinder.

Conventionally, these grip-side and bottom-side plate vices are composed of a long vise base extending in the axial direction of the plate cylinder, and a plurality of arc-shaped heads at the end edges of the vise base. A holding plate that is swingably supported by individual bolts, a plurality of cams that are aligned in parallel and fixed on a rotatable cam shaft by engaging a notch with the edge of the holding plate, and a holding plate. And a compression coil spring interposed between the vise and the vise base. With this configuration, when the plate is gripped, the cam shaft is rotated, the edge of the gripper plate is released from the engagement with the notch of the cam, and the compression coil spring Since it opens by elastic force, after inserting the end of the plate between the holding plate and the vise table, rotate the cam shaft in the opposite direction to the previous direction, and the holding plate will be compressed by the action of the cam. It swings and closes against the elastic force of the spring, and holds the edge of the plate. After that, by moving the entire butt plate vice in the circumferential direction, the plate is stretched uniformly and adheres closely to the body circumferential surface.

Further, for example, in the device disclosed in Japanese Patent Laid-Open No. 1-127346, the bottom 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. In this way, the vise base and the gripper plate are extended in the radial direction of the plate cylinder, and the end of the plate is bent at a right angle by a separately provided plate bending machine. With this structure, the tail end of the plate, which is held around the gripper side and wrapped around the body circumference, moves the bent part between the vise base and the gripper plate. The bent edge of the plate is gripped by inserting it and swinging the gripper plate with the cam mechanism.After this, by moving the entire butt plate vice in the circumferential direction, the plate is evenly stretched. It adheres to the body circumference.

However, in such a conventional plate mounting apparatus for a plate cylinder, it is difficult to insert the plate into the narrow opening of the plate side vise, which requires a long time and a lot of labor. Insert the bottom of the plate, which is bent almost at a right angle, into the opening of the vise on the buttocks because the plate that guides to the vise on the buttocks side does not adhere to the peripheral surface of the plate cylinder while being wrapped around the torso. However, there is a problem in that it is difficult to do and it takes more time and labor.

Therefore, conventionally, there has been proposed a printing plate supply device for a plate cylinder as disclosed in, for example, Japanese Patent Laid-Open No. 58-187355. This plate supply device is provided with an arm having a suction pad fixed to the leading end thereof, and a grip side hook and a tail side hook for plate mounting are provided on the plate cylinder side. In the device configured as described above, when the plate is mounted on the peripheral surface of the plate cylinder, the arm that adsorbs the plate with the suction pad is placed between the plate mounting position and the grip side hook on the outer periphery of the plate cylinder. After moving and hooking the bent end of the plate on the grip side, this plate is wrapped around the body circumference, and the other end bent part of the plate is hooked on the rear side hook in the same manner as described above. There is.

[0007]

[Problems to be solved by the device]

 However, in such a conventional device, since the bending 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. Also, there is a problem that the structure is complicated. Furthermore, since the reference pin that engages with the reference hole of the printing plate is provided only on the plate vise device side, and the plate must be mounted while engaging the reference pin in this reference hole, it is not necessary to mount the plate. Not only does it take a long time and a lot of labor, but there is also a problem that it is not possible to expect a sufficiently high-precision printing register.

The present invention has been made in view of the above points, and is a printing plate of a printing press capable of supplying the printing plate to the plate vise device with a simple configuration in a short time and with high accuracy. The purpose is to provide a supply device.

[0009]

[Means for Solving the Problems]

 In order to achieve such an object, according to the present invention, in a printing machine provided with a plate vise having a plate gripping surface extending in the circumferential direction of the plate cylinder in the outer peripheral cutout of the plate cylinder, A plate holding device, which is approximately flush with the printing surface, is arranged outside the plate cylinder, and the reference hole provided in the plate and the reference provided in the plate vise are provided on the surface of the plate holding device. A reference pin that occupies the same position in the left-right direction of the plate and the plate is planted, the plate is held and the movement of the plate in the left-right direction is restricted, and the drive device drives the plate cylinder forward and backward correctly. The holding member was supported on the surface of the plate holding device.

[0010]

[Action]

 During the printing operation, the holding member provided on the surface of the plate holding device holds the plate to be used next, and the reference hole of this plate is engaged with the reference pin of the plate holding device. Be prepared. When the printing operation is completed, the used old plate is removed, and then the plate cylinder is rotated to stop the plate cylinder at a position where the reference pin of the plate holding device and the reference pin of the plate-side plate vise face each other. Then, open the gripping surface of the gripper plate vise, and move the holding member in the plate cylinder direction while restricting the movement of the printing plate to the left and right. , The reference hole of the printing plate is engaged with the reference pin of the plate vise to position the plate correctly, while it is inserted into the open plate holding surface. One end is properly gripped by the gripper plate vise. When the plate cylinder is rotated about one turn, the bottom edge of the plate opposes the plate holding surface of the plate-side plate vise of the plate cylinder. The plate is mounted correctly by inserting the other end and closing the plate holding surface.

[0011]

1 to 11 show an example in which a plate supply device of a printing press according to the present invention is applied to an automatic plate changing device. FIG. 1 is a front view of a plate holding device, and FIG. 2 is a plate. Partially broken side view of the upper half of the holding device, FIG. 3 is a partially broken side view of the lower half of the plate holding device, FIG. 4 is a side view of the plate holding device, and FIG. 5 is the plate cylinder embodying the present invention. 5 is a plan view, FIG. 6 is a sectional view taken along line VI-VI of FIG. 5, FIG. 7 is a sectional view taken along line VII-VII of FIG. 5, FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 5, and FIG. FIG. 10 is a schematic side view of the entire plate supply device, and FIG. 11 is a plan view of the plate. First, the configuration of the plate vise device will be described with reference to FIGS. In the figure, a cutout 2 having a substantially rectangular cross section is provided on the outer periphery of the plate cylinder 1 over the entire length of the cylinder, and both ends of the cutout 2 are saddle-shaped. The formed guides 3 and 4 are bolted to the bottom of the notch. The gripping side plate vise, which is generally designated by reference numeral 5, is provided with a vise table 6 whose cross section is formed into a substantially square shape and extends in the trunk axis direction. The left and right guides 3 and 4 are fitted so as to be restricted from moving up and down and allowed to move slightly in the circumferential direction. A screw hole 6b whose cross section is shown in FIG. 8 is provided at a plurality of positions in the longitudinal direction of the vise table 6, and an adjusting screw 7 having a tapered end is screwed into the screw hole 6b. In the pin hole corresponding to the adjusting screw 7, a flanged pin 8 in which the flange is engaged in the gap between the vise base 6 and the wall surface of the notch 2 has the tip of the adjusting screw 7. It is slidably inserted in contact with the tapered surface. By doing so, when the adjusting screw 7 is rotated, the vise table 6 is moved and adjusted by a slight amount in the circumferential direction by the action of the tapered surface. The reference numeral 9 in FIG. 8 is interposed between the stud 10 on the side of the vise table 6 and the wall surface of the concave hole 2a of the notch 2 to urge the entire plate vise 5 outward in the circumferential direction. It is a compression coil spring.

An L-shaped gripping plate holder 11 shown by a broken line in FIG. 8 is fixed by bolts to a plurality of inclined surfaces of the vise table 6, and a pin projecting horizontally from the gripping plate holder 11 is provided. A gripping plate 14 having the same length as the vise table 6 and divided into four in the axial direction is swingably supported on the carriage 12 in the circumferential direction of the plate cylinder 1. The gripping surface 14a extending to the opposite side faces the gripping surface 6c of the vise table 6. Although not shown, a plurality of ridges are formed on the gripping surface 14a and engage with the concave grooves of the opposing gripping surface 6c. A plurality of studs 15 whose cross section is shown in FIG. 6 are arranged on the bottom surface of the vise table 6 so as to be juxtaposed in the axial direction so as to project into the recessed holes 2a of the notch 2. A compression coil spring 17 is interposed between the spring receiving pin 16 screwed into the hole and the lower end concave hole of the holding plate 14 to urge the holding plate 14 in the direction in which the holding surface 14a closes.

On the other hand, in the central portion of the bottom surface of the notch 2, a plurality of rectangular bearings 18 are fixed in parallel in the axial direction with bolts, and these bearings 18 have a hexagonal cross section. A cam shaft 19 having a circular shape 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 mounted on the cam shaft 19. However, they are mounted in parallel in the axial direction. The cam surface of each plate gripping cam 20 is in contact with the vertical surface of each gripping plate 14, and the large diameter portion of the plate gripping cam 20 is compressed by rotating the cam shaft 19 by a driving device described later. The gripping plate 14 is swung counterclockwise in the figure against the elastic force of the coil spring 17 to open the gripping surface 14a.

Inside the notch 2, a rear-side plate vise generally designated by reference numeral 30 is provided in parallel with the grip-side vise 5. The rear side plate vise 30 is provided with a spring bearing bar 31 formed to have a length substantially equal to the body length and having a vertical surface abutting the vertical surface of the bearing 18, and the spring bearing bar 31 includes a plurality of spring bearing bars 31. It is fixed to the bottom surface of the notch 2 by a bolt 32. The spring receiving bar 31 is provided with a regulation surface 31a extending in the radial direction of the plate cylinder 1. Between the regulation surface 31a and the wall surface 2b of the cutout 2, a support shaft 33 connects both ends to a circle at both ends of the plate cylinder 1. The vise table 35 and the gripper plate 36, which are extended in close proximity to the plate-shaped bearer 34 and are divided into three parts in the cylinder axis direction, respectively, include a gripping surface 35 a, which extends in the radial direction of the plate cylinder 1. 36a are opposed to each other, and the opposite gripping surface side is swingably connected by the support shaft 33. Numeral 37 is an adjusting screw for connecting the three divided vise bases 35, and the right screw and the left screw are screwed into the screw holes of the respective vise bases 35, respectively. The gap between the two vise bases 35 is adjusted by inserting a tool into the hole of the collar portion 37a integrally formed at the position and rotating it.

In the recess 2 c formed in the wall surface 2 b of the cutout 2, a cam 38 formed in a rod shape with a small flat portion 38 a and a large diameter portion 38 b having an arc shape is rotated by the bearer 34. The bearing 38 is self-supporting, and the projecting 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 notched wall surface 2b by a bolt 41. Further, these vise bases are provided between the bottoms of the plurality of spring holes formed at the opposite end of the vise base 35 and the bottoms of the plurality of spring holes formed in the spring receiving bar 31. A compression coil spring 42 for biasing the spring receiving bar 31 and the spring receiving bar 31 away from each other is interposed, and a double nut is provided slidably in a spring hole 31b in the upper portion of the spring receiving bar 31. 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 provided between the flange portion of the spring shaft 44 whose movement end is restricted by 43 and the bottom surface of the spring hole 31b. It is loaded. A compression coil spring 46 is installed in the spring hole above the vise table 35 so as to bias the vise table 35 in a direction of separating it from the gripper plate 36. 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 device is provided close to the left and right frames 50 that pivotally support the plate cylinder 1 and the blanket cylinder 47, respectively. However, in Fig. 5, it is on the left side for convenience of drawing.) The frame 50 side will be described. An air cylinder 51 as a drive device is swingably and pivotally supported on the upper end surface of the frame 50 via a bracket 52. On the other hand, the grip side cam shaft 19 and the hip side cam 38 are A lever 53 and a lever 54 are positioned between the bearer 34 and the frame 50 and fixed by split tightening. A link 55 is provided between the levers 53 and 54 and the air cylinder 51. A mechanism is provided. That is, the tip end of the rod 57 connected to the piston rod 56 of the air cylinder 51 is pivotally attached to the free end of the L-shaped lever 59 rotatably supported on the upper surface of the frame 50 via the bracket 58. The lower end of the rod 60, whose upper end is pivotally attached to the other free end of the L-shaped lever 59, 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 the left and right frames, the movement of which is restricted in the axial direction. The lever shaft 65 rotates the lever 66 when the movement of the lever 66 is restricted in the axial direction. It is movably supported, and the free end of this lever 66 is pivotally attached to the center of the roller lever 64. That is, a four-bar link is formed by the levers 63 and 66 and the roller lever 64, and the roller lever 64 swings with the lever 62 driven by the air cylinder 51 side. It is configured to move back and forth in the radial direction of 1. A roller 67, which selectively corresponds to one of the levers 53 and 54 depending on the rotational phase of the plate cylinder 1, is pivotally attached to the tip end of the roller lever 64 as described above. Thus, 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 plate side gripping face of the tail side plate vise 30 is closed. Is configured to open.

Further, on the left side of the sheet feeding device (hereinafter, simply referred to as the left side; however, in FIG. 5, it is the right side for convenience of drawing), the frame side has the same configuration as the above and has an opening / closing not shown in FIG. A drive device is provided, and this open / close drive device has exactly the same configuration as that shown in FIG. 9 from the air cylinder 51 to the roller 67, but only the levers 53 and 54 are different. That is, in FIGS. 5 and 9, the levers 53, 54 on the right side direct the tips from the cam shaft 19 and the cam 38 toward the upper side of the drawing, but in the left side opening / closing drive device, reference numerals 53A, 53A in FIG. A lever 54A directs the tip from the cam shaft 19 and the cam 38 downward in the drawing. That is, the tip end of the left gripper lever 53A and the tip end of the right tail lever 54A are configured to face the rollers 67 on both sides at the same time in the same phase in the circumferential direction. By doing so, when the left and right air cylinders 51 are simultaneously actuated and the lever 54 is pushed by the right side roller 67, the plate holding surface of the bottom side plate vise 30 is opened and at the same time the lever 53A is pushed by the left side roller. 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. 10 is a cover that covers the front side of the peripheral surface of the plate cylinder 1 over the entire length, and a cover of the L-shaped lever 72 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 end thereof, and the working end of a piston rod 74 of an air cylinder 73 pivotally supported on the frame 50 side is pivotally attached to the L-shaped lever 72. By doing so, the air cylinder 73 is operated in response to 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.

Here, the plate shown in FIG. 11 will be described. A plate 105, which will be described later, is formed in a rectangular shape by a thin plate of aluminum or the like, and a margin portion 105b is provided on four circumferences of the printing surface 105a. The margin portion 105b is provided with a plurality of register marks 105c as marks for aligning the printing registration, and the margin portion 105b on the gripping side has a U-shaped reference hole 105d and a U-shaped reference hole 105d. A reference hole 105e having a character shape is provided. The registration marks 105c and the reference holes 105d and 105e are provided on the basis of the printing surface 105a at the time of plate making, and are configured so as to serve as a reference for registration when the plate 105 is mounted and when printing. There is.

The plate vise device and the opening / closing device thereof configured as described above are provided with a plate changing device for exchanging a used old plate with a new plate to be used. That is, a pair of left and right brackets 81 is fixed obliquely above the plate cylinder 1 at the upper and rear portions of the left and right frames 80 provided in the printing unit adjacent to the front of the frame 50. A swing support shaft 82, which is rotatably supported by a bracket 81, has a loader 83 as a plate holding member formed in a horizontally long rectangular shape having a length substantially the same as the plate cylinder 1 in a front view. The part is fixed and is swingably provided. On the other hand, on the left and right frames 80, air cylinders 84 connected to the control device are pivotally supported near the bracket 81 so as to be swingable. A lever 86 pivotally attached 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 swings via the levers 86 and 87, and swings between the drooping posture shown by the solid line in the figure and the tilting posture shown by the chain line. It moves so that the leading end moves in the perspective direction with respect to the peripheral surface of the plate cylinder 1.

As shown in FIG. 3, in the lower half portion of the loader 83, two guide plates 88 each having an inlet portion formed in a V shape are vertically extended. In the meantime, a 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 1 enters in the direction of the arrow. On the other hand, at the upper end portion of the loader 83, a plurality of brackets 90, each of which is formed in an oval shape, are fixed to the tubular swing support shaft 82 so that the loader 83 is extended in the width direction. The brackets 90 of each set are provided with a convex 91. The convex 91 is provided with a strip-shaped plate spring 92 which is biased by a spring force in the winding direction. At the rewinding end of the plate spring 92, a plate edge holding device indicated by reference numeral 93 is fixed. ing. An L-shaped plate hook 95 pivotally supported by a holder 94 at the end of the leaf spring 92 is urged by the torsion coil spring 96 so that the plate edge holding device 93 is in an upright posture shown by a solid line. The hooked portion of the plate hook 95 is configured so that the bent end of the plate 89 that has entered between the guide plates 88 can be hooked. That is, prior to the start of the replacement work of the plate 89, the entire plate edge holding device 93 is manually pulled down to the standby position of the central portion of the loader 83 together with the leaf spring 89, and the air cylinder provided at this standby position. When the piston rod 98 of 97 is pushed forward 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 opened at the upper end of the plate hook 95. The plate edge holding device 93 is configured so as to be stopped from being lifted by the tensile force of the leaf spring 92 by pressing against the cover 99. Reference numeral 100 denotes a sensor, which comprises a light emitter and a light receiver and is provided in the vicinity of the air cylinder 97, and detects the leading end of the plate 89 that has entered between the guide plates 88, thereby causing the piston rod 98 of the air cylinder 97 to move. The plate holder 95 is moved backward to stand up in a solid line state by the elastic force of the torsion coil spring 96, and the bent end of the plate 89 is hooked on the plate holder 95, and the holder 94 is unlocked so that the leaf spring 92 is released. The entire plate edge holding device 93 is lifted with the plate 89 by the pulling force of the plate 89, and 89 is drawn into the loader 83 and stored.

Further, the pin 102 is urged by the compression coil spring 103 in the direction of coming out of the block 101 and slides in the pin hole of the block 101 provided at the upper end of the loader 83 in correspondence with the plate hook 95. It is movably 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, It is configured so that the bent portion is released from the holding and can be removed from the loader 83.

Next, the plate supply device will be described. On the surface of the loader 83, a plurality of stages are provided each as a holding member that is connected to a suction air source and sucks and holds the new plate 105 supplied to the plate cylinder 1 instead of the old plate 83. In this case, three stages (not shown in the middle stage) of the suction pads 104 are provided, and the lower stage suction pad 104 is formed so as to be vertically movable. That is, above the lower suction pad 104, a pair of left and right air cylinders 106 are supported by both side plates of the loader 83 via brackets 107, and the suction pad 104 is attached to both ends of the piston rod 108 of the air cylinder 106. Are installed in parallel on the fixed bar 109, and the bar 109 holding the new plate 105 is restricted by the piston rod 108 moving forward, and the horizontal movement of the new plate 105 is restricted as shown in the figure. It is configured to move from the position shown by the solid line to the position shown by the chain line, and supply the new plate 105 to the gripping plate vise 5 which is open facing the tip thereof. Reference numeral 110 denotes a rack fixed to the left and right side plates of the loader 83 and engaging with the pinions 111 at both ends of the bar 109 to smoothly retreat the bar 109.

A bar 112 is fixedly supported on the lower end of the loader 83 over the entire width of the loader 83. The pin holes formed at both ends of the bar 112 in the width direction have reference pins. 113 is formed so as to be able to move forward and backward with respect to the surface of the loader 83, and is fitted by being biased in the direction of protruding from the surface of the loader 83 by the compression coil spring 114 loaded in the hole. Denoted at 115 is a bolt which is screwed into the screw hole of the bar 112 and has its tip engaged with the long groove of the reference pin 113 to restrict the rotation of the reference pin 113 and restrict the protruding end of the reference pin 113. The reference pins 113 are set and provided so as to be in the same position in the left-right direction of the plate 105 as the reference holes 105d and 105e shown in FIG.

Here, the reference pin provided on the gripping plate vise will be described. FIG. 12 is a sectional view taken along the line XII-XII in FIG. 5, in which the vise base 6 of the gripper plate vise 5 provided in the notch 2 of the plate cylinder 1 is screwed to the bottom of the notch 2. Lifting from the bottom surface is regulated by the holding plate 116, and notches 6d are provided at both longitudinal ends of the vise table 6. Reference numeral 117 denotes a reference pin base fixed to the bottom surface of the notch 2 with a bolt 118, which is engaged with the notch 6d. On the upper surface of the reference pin base 117, a reference pin 119 is provided. It is engaged and planted in the notch 14b. Reference numeral 120 denotes a leaf spring screwed to the upper surface of the vise table 6, and the hole formed therein is engaged with the reference pin 119, and is pressed against the holding surface 6c of the vise table 6. There is. The reference pin 119 is set and provided so as to be in the same position in the left-right direction of the plate 105 as the reference holes 105d and 105e shown in FIG.

Therefore, returning to the plate feeding apparatus, the description will be continued. An arm shaft 125 is rotatably supported at the lower end of the loader 83, and roller arms 126 are fixed to both side projections of the arm shaft 125 from the loader 83. On a roller shaft 127 fixedly supported between the free ends of the rollers, a plurality of rollers 128 formed in a brush shape, for example, are rotatably arranged side by side. A lever 133 is fixed to a working end of a piston rod 131 of an air cylinder 130 fixed to a widthwise end of a loader via a bracket 129, and a lever 133 is fixed to a lower end of the lever 133 via a connecting plate 132. A free end of a lever 134 fixed to the arm shaft 125 is pivotally attached. By doing so, when the piston rod 131 of the air cylinder 130 advances and retracts, the arm 126 rotates between the storage position shown by the solid line in FIG. 4 and the use position shown by the chain line, and in the use position, the rollers 128 move. It is configured to be pressed against the new plate 105 on the first plate 1 so that the new plate 105 is brought into close contact with the peripheral surface of the plate cylinder 1 and the rear end of the new plate 105 is inserted into the open rear plate vise 30. There is. Further, on the arm shaft 125, a plurality of rollers 135, for example, formed in the shape of brushes, are arranged side by side for slidingly guiding the new plate 105 supplied to the plate vise 5. Reference numeral 136 is a deposition roller of an inking device which is in contact with the plate surface on the plate cylinder 1 and adheres 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 that rotates the plate cylinder 1 are connected to a control device (not shown), and are configured to operate at a predetermined timing. Reference numeral 137 is a foldable cover that covers the front surface of the loader 83, and is configured to open and close by gripping the grip 138.

The operation of the plate changing device including the plate holding device as described above will be described. During the printing operation, 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 105d and 105e are engaged with the reference pin 113. By doing so, it is positioned and mounted on the loader 83. Further, when the plate discharge gripping device 93 in the loader 83 is manually pushed down to the waiting position and at the same time the air cylinder 97 is operated by a push button operation, the piston rod 98 advances and pushes the plate hook 95. As shown by the chain line in FIG. 10, one end presses the holder 94 and presses it against the inner wall surface of the cover 99 of the apparatus main body, so that the entire device is fixed at the standby position and the plate holder 95 is tilted. The hook-shaped part at the lower end becomes open.

When the old plate 89 is replaced with the new plate 105 after the printing work is completed, when the start button is pressed, the air cylinder 73 is actuated, and the cover 70 is shown by the chain line in FIG. 10 via the L-shaped lever 72. While opening as shown, the air cylinder 84 operates and the loader 83 tilts to the plate exchange position via the levers 86 and 87. Further, the servo motor rotates to rotate the plate cylinder 1 by a predetermined angle until it occupies the plate discharge position. In this case, the rear side plate vise 30 faces the tip of the loader 83 as shown in FIG. 3, and the right roller 67 contacts the tip of the lever 54 on the cam 38 as shown in FIG. .. Further, the tip end of the left roller faces the lever 53A on the cam shaft 19, which is in the same phase as the lever 54, and the left and right air cylinders 51 operate simultaneously in this state. The grip side plate vise 5 and the buttocks side plate vise 30 open at the same time.

In this state, due to the rigidity of the old plate 89, the end on the butt side is opened by the butt plate vise 30. The old plate 89 jumps out from the holding surface of the butt plate vise 30 and hits the guide 140 shown in FIG. Since the plate cylinder 1 rotates in the direction opposite to the arrow in FIG. 3, the rear side of the old plate 89 enters between the guide plates 88 of the loader 83. When the insertion end of the old plate 89 that has entered passes through 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. To do. As a result, the plate hook 95 hooks the rear side bent end of the old plate 89, and the holder 94 is released from being fixed by pressure contact, so that the entire plate discharge holding device 93 is accumulated in the leaf spring 92 provided in the convex 91. The old plate 89, which is lifted by the pulling force and held by the plate hook 95, is drawn into the loader 83 and stored therein.

When the plate discharge is completed in this way, the servo motor operates to rotate the plate cylinder 1 slightly, and as shown in FIG. 3, the open plate holding surfaces 6c and 14a of the holding side plate vise 5, The bar 109 is lowered while the air cylinder 106 is operated and the pinion 111 is rotated on the rack 110 while stopping at the position on the same plane as the new plate 105 engaged with the reference pin 113. The new plate 105 held by the suction pad 104 is slidably contacted by the rollers 135 and guided and descends, and the new plate 105 is inserted into the grip plate vice 5 at its gripping end. In this case, the edge of the new plate 105 is guided by the leaf spring 120 and inserted between the gripping surfaces 6c and 14a, and the reference holes 105d and 105e of the new plate 105 are engaged with the reference pin 119. Since the new plate 105 held by and the gripping surfaces 6c and 14a are on the same plane and the suction head 104 is restricted from moving the new plate 105 in the left-right direction, the reference holes 105d and 105e The pin 119 is smoothly engaged. After the insertion, the lever 53 shown in FIG. 9 faces the roller 67. Therefore, when the air cylinder 51 operates, the cam shaft 19 rotates together with the lever 53, and the holding plate 14 is rotated by the elastic force of the compression coil spring 17. Is rotated about the pin 12, and the new plate 105 is gripped by the grip plate vice 5.

In this state, the servo motor is rotated to rotate the plate cylinder 1 in the direction of the arrow, the new plate 105 is wound around the peripheral surface of the plate cylinder 1, and its rear side bent end corresponds to the roller 128. Stop at the position. When the plate cylinder 1 rotates, the rollers 135 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. After that, the air cylinder 130 is actuated, the piston rod 131 is retracted, the arm 126 is rotated via the levers 133 and 144, and the brush-like roller 128 is pressed against the peripheral surface of the plate cylinder 1, whereby The rear end of the new plate 105 is inserted into the rear plate vise 30 by the roller 128. 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. The force table 35 and the grip plate 36 rotate and close against the elastic force of the compression coil springs 45, 45, and grip the rear end of the new plate 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. .. Thereafter, the piston rod 85 of the air cylinder 84 retreats and pulls the levers 86 and 87, so that the loader 83 hangs down to the retracted state, and the cover 70 is closed by the operation of the air cylinder 73, so that the printing operation is resumed. can do.

After the printing work is restarted, when the user stands in front of the loader 83 and pushes the pin 102 at an appropriate time, the plate holder 95 tilts to release the old plate 89 from the holding state. Further, as described above, the new plate 105 can be mounted on the loader 83 and prepared during the printing operation. Further, the space between the printing units when the loader 83 is stored is not reduced.

Although the present embodiment shows an example in which the present invention is applied to an automatic plate changing device, the present invention is not limited to this, and the plate holding device can be operated by a push button operation or the like. Good. Further, in the present embodiment, an example in which the present invention is applied to a sheet-fed printing press is shown, but it can be applied to a web-fed rotary printing press having a similar plate fixing device, and similar effects can be obtained. Needless to say.

[0034]

[Effect of the device]

 As will be apparent from the above description, according to the present invention, in a printing machine provided with a plate vise having a plate gripping surface extending in the circumferential direction of the plate cylinder, a printing surface whose surface is substantially flush with the plate gripping surface. The plate holding device is arranged outside the plate cylinder, and the reference hole provided on the plate and the reference pin provided on the plate vise are aligned with the horizontal position of the plate on the surface of the plate holding device. Plant the occupying reference pin. Hold the plate by holding the plate on the surface of the plate holding device, which is controlled by the drive device to move back and forth in the radial direction of the plate cylinder by restricting the horizontal movement of the plate. The printing plate held by the device is fed straight to the plate vise of the plate cylinder, and its reference hole is accurately and smoothly engaged with the reference pin of the plate vise, improving the printing registration accuracy and The preparation time is shortened and the machine utilization rate is improved.

[Submission date] July 3, 1992

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

[0009]

[Means for Solving the Problems]

In order to achieve such an object, according to the present invention, in a printing machine provided with a plate vise having a plate gripping surface extending in the axial direction of the plate cylinder in the outer peripheral cutout of the plate cylinder, the surface is A plate holding device that is approximately flush with the surface is arranged outside the plate cylinder, and a reference hole provided on the plate and a reference pin provided on the plate vise are provided on the surface of the plate holding device. A reference pin that occupies the same position in the left-right direction of the printing plate is planted, and the printing plate is held by a drive device that feeds the printing plate approximately in the same direction as the gripping surface of the plate vise of the plate cylinder. The plate was supported on the surface of the plate holding device.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

As shown in FIG. 3, in the lower half portion of the loader 83, two guide plates 88 each having an inlet portion formed in a V shape are vertically extended. In the meantime, a 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 1 enters in the direction of the arrow. On the other hand, at the upper end portion of the loader 83, a plurality of brackets 90, each of which is formed in an oval shape, are fixed to the tubular swing support shaft 82 so that the loader 83 is extended in the width direction. The brackets 90 of each set are provided with a convex 91. The convex 91 is provided with a strip-shaped plate spring 92 which is biased by a spring force in the winding direction. At the rewinding end of the plate spring 92, a plate edge holding device indicated by reference numeral 93 is fixed. ing. An L-shaped plate hook 95 pivotally supported by a holder 94 at the end of the leaf spring 92 is urged by the torsion coil spring 96 so that the plate edge holding device 93 is in an upright posture shown by a solid line. The hooked portion of the plate hook 95 is configured so that the bent end of the plate 89 that has entered between the guide plates 88 can be hooked. That is, prior to the start of the replacement work of the plate 89, 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 provided at this standby position is also used. When the piston rod 98 of 97 is pushed forward 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 opened at the upper end of the plate hook 95. The plate edge holding device 93 is configured so as to be stopped from being lifted by the pulling force of the leaf spring 92 by pressing against the cover 99. Reference numeral 100 denotes a sensor, which comprises a light emitter and a light receiver and is provided in the vicinity of the air cylinder 97, and detects the leading end of the plate 89 that has entered between the guide plates 88, thereby causing the piston rod 98 of the air cylinder 97 to move. The plate holder 95 is retracted to stand up in a solid line state by the elastic force of the torsion coil spring 96, the bent end of the plate 89 is hooked on the plate holder 95, and the holder 94 is unlocked, so that the leaf spring 92 is released. The entire plate edge holding device 93 is lifted together with the plate 89 by the pulling force of the plate 89, and 89 is drawn into the loader 83 for storage.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

Each device 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. A cover 137 is formed so as to be foldable and covers the front surface of the loader 83. The cover 137 is configured to be opened and closed by gripping a handle ( not shown) provided on the top of the cover 137 . 138 is a grip for vertical movement between a position to raise the loader 83 and hanging position from the vertical position under.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction content]

[0034]

[Effect of the device]

As is apparent from the above description, according to the present invention, in a printing machine provided with a plate vise having a plate holding surface extending in the axial direction of the plate cylinder, a printing plate whose surface is substantially flush with the plate holding surface. A holding device is arranged outside the plate cylinder, and the reference hole provided on the plate and the reference pin provided on the plate vise occupy the same position on the surface of the plate holding device in the horizontal direction of the plate. Plant the reference pin. The plate is held and held by the plate holding device by supporting the transporting member on the surface of the plate holding device, which holds the plate in the same direction as the gripping surface of the plate vise of the plate cylinder. The printing plate is fed straight to the plate vise of the plate cylinder, and its reference hole is accurately and smoothly engaged with the reference pin of the plate vise, improving the printing registration accuracy and the preparation time. And the operating rate of the machine is improved.

[Brief description of drawings]

FIG. 1 is a front view of a plate holding device.

FIG. 2 is a partially cutaway side view of the upper half of the plate retainer.

FIG. 3 is a partially cutaway side view of the lower half of the plate holding device.

FIG. 4 is a side view of a plate holding device.

FIG. 5 is a plan view of a plate cylinder embodying the present invention.

6 is a cross-sectional view taken along the line VI-VI of FIG.

7 is a sectional view taken along line VII-VII of FIG.

8 is a sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a side view of the plate vise opening / closing device.

FIG. 10 is a schematic side view of the entire plate supply device.

FIG. 11 is a plan view of a printing plate.

12 is a sectional view taken along line XII-XII in FIG.

[Explanation of symbols]

 1 plate cylinder 2 notch 5 grip side plate vise 60,000 force table 6c gripping surface 14 gripping plate 14a gripping surface 83 loader 104 suction pad 105 new version 105d reference hole 105e reference hole 106 air cylinder 113 reference pin 119 reference pin 130 air cylinder

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[Procedure amendment]

[Submission date] July 3, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Item name to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

[Scope of utility model registration request]

Claims (1)

[Scope of utility model registration request] 1. A printing machine equipped with a plate vise fixed in an outer peripheral cutout of a plate cylinder and having a plate gripping surface extending in a circumferential direction of the plate cylinder, wherein the surface arranged on the outer side of the plate cylinder is A plate holding device which is approximately flush with the plate gripping surface, a reference hole provided on the plate of the plate holding device and provided on the plate, and a reference pin provided on the plate vise and the horizontal direction of the plate. , The reference pin occupying the same position, and the plate holding device which is supported on the surface of the plate holding device holds the printing plate and regulates the lateral movement of the printing plate, and is driven forward and backward in the radial direction of the plate cylinder by the driving device. A plate supply device for a printing press, comprising a holding member.