JP3044638B2 - Plate supply device for printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing press for supplying a plate held by a plate holding device to a plate fixing device of a plate cylinder so that both ends are fixed and wound around the cylinder. It concerns the device.

[0002]

2. Description of the Related Art A plate cylinder of a printing press is provided with a plate fixing device for fixing a printing plate (hereinafter, simply referred to as a plate) wound around the cylinder of the plate cylinder. That is, in the notch provided on the outer peripheral portion of the plate cylinder, a vice on the side of the plate for holding and holding the edge on the side of the plate, and after being attached to the vice, wound around the peripheral surface of the plate cylinder. A plate vise device, comprising a plate-side vise that holds the plate-side end together, is extended in the axial direction of the plate cylinder.

[0003] plate clamping of this kind, opened and closed by a lockup table elongated extending in the cylinder axis direction, it is driven such by a cam swingably provided against this lockup table swings It has a holding plate that holds the plate between the vise. And
The grip surface of the vise is provided with a reference pin which engages with a positioning notch provided at the edge of the plate.

When mounting a plate on such a plate cylinder,
After the gripping plate vise faces the work surface, open the gripping plate of the gripping plate vise by operating the cam, and hold the gripper side end of the plate held by hand with the open gripping plate. The plate is inserted between the platen and the notch of the plate and the reference pin of the vise table are engaged and positioned, and then the gripper plate is closed to close the gripping side end of the plate.

Next, when the plate cylinder is rotated about one turn, the plate is wound on the peripheral surface of the plate cylinder, and the rear side vice faces the work surface. After the butt-side edge of the plate is attached to the butt-side vise, the butt-side vise is moved in the circumferential direction of the plate cylinder. Is completed.

In the case where the specifications of the printed matter are changed and the plate is replaced from the old plate to the new plate, the old plate is removed by a reverse operation to the mounting operation, and the new plate is mounted as described above. The plates are exchanged.

However, in such conventional mounting of a plate, operation of a cam for opening and closing the plate vise,
It is necessary to perform the rotation operation of the plate cylinder manually or by a push button operation, and this operation must be performed while holding the end of the plate by hand, so that not only a great deal of labor and skill is required, but also There is also a problem in work safety.

Accordingly, the present applicant has proposed a plate holding device for plate replacement in which plate discharge and supply and rotation of the plate cylinder are automated, and this is disclosed in, for example, Japanese Patent Application Laid-Open No. 3-184848. Therefore, an outline of the configuration and operation will be described below.

This printing plate holding device is provided with a rectangular frame-shaped loader which is swingably supported at the upper end portion of a frame of an adjacent printing unit and is hung. The loader is replaced when the plate is replaced. It is configured to swing from the suspended storage state to a use state in which the leading end portion is inclined close to the peripheral surface of the plate cylinder.

In the loader, an old plate holding device for pulling up a used old plate discharged from the plate cylinder upward and holding a plurality of used plates,
A new plate holding device for holding a plurality of new plates to be used and supplying the new plates one by one to the plate cylinder one by one from above is provided. A plurality of suction ports that adsorb the central portion of the plate that has entered and move upward by an air cylinder or the like are provided in parallel in the left-right direction of the loader. Also, in the new version holding device,
A plurality of suction ports for sucking a new plate and moving downward by an air cylinder or the like are provided in parallel in the left-right direction of the loader.

[0011] In this case, the grip surface of the vise on the rear side extends in the radial direction of the plate cylinder, and the rear end of the plate is bent at a right angle by a plate bending machine. A plate press roller is provided at the tip of the loader. The plate press roller is pressed against the plate wound around the drum peripheral surface, so that the plate comes into close contact with the drum peripheral surface. The press roller or a separately provided plate press roller is configured to press the bent piece at the end on the butt side and insert the bent piece into the holding surface.

In the printing plate changing apparatus thus configured, a plurality of new plates to be used are stacked in the order of use during the printing operation and held in the new plate holding device in the loader. When the plate is replaced, the loader is tilted to the use state, and then the plate cylinder is rotated by a predetermined angle and the rear plate vise stops facing the lower end of the loader. Is opened and the used-side end of the old plate jumps out of the plate vise, so that the plate cylinder rotates and the old plate enters the loader, and the plate gripping device on the loader side moves the old plate's bottom end. The old version is stored in the loader.

Next, when the plate cylinder is rotated by a predetermined angle and the gripping plate vise stops facing the lower end of the loader, the gripping plate vise is opened and a plurality of sheets held in the loader in advance are opened. One of the upper layers of the new version is sucked by a plurality of suction ports, and these suction ports are driven downward by an air cylinder or the like. It is inserted into the gripping surface of the plate vice while engaging with the reference pin, and the gripper plate is closed, whereby the gripping end of the new plate is gripped.

Thereafter, the plate cylinder is rotated about one turn, and the new plate is wound around the drum peripheral surface. At the same time, the rotation of the plate cylinder stops at a position where the vice on the rear side faces the work surface. The end is added with a vice version of a vise. When the new plate is wound, the plate holding roller is pressed against the new plate, so that the new plate is in close contact with the peripheral surface of the torso. Since the side end is pressed, it is securely inserted.

[0015]

However, in such a conventional apparatus, when a new plate is supplied to the plate cylinder, the new plate is sucked and lifted by a plurality of suction ports arranged in parallel on a bar extending in the width direction of the loader. Because it is configured to be inserted into the holding surface of the plate vise, the suction timing of each suction port may not match or the bar may tilt, and as a result, the plate may be bent and mounted or the new plate side There is a problem that it takes a long time for adjustment because the notch does not accurately engage with the reference pin on the vise side. In addition, when the suction hole that sucked the new plate is pulled straight up, the reference pin and the notch rub against each other, causing the reference pin to wear or bending the end of the printing plate. There is a problem that defects occur.

The present invention has been made in view of the above points, and makes it possible to uniformly hold a printing plate by a plurality of printing plate holding members without abrasion and damage of the reference pin and the printing plate. It is an object of the present invention to provide a printing plate supply device for a printing press.

[0017]

In order to achieve the above object, according to the present invention, a printing plate placed on a mounting surface is held and moved, and the printing plate is provided on a plate cylinder. In a plate supply device of a printing press provided with a plate moving device for moving a plate to a fixed device, the plate moving device holds the plate and is driven by a driving device to move up and down in a perspective direction with respect to the mounting surface. The printing apparatus comprises a holding member and a driving device for moving the plate holding member in the direction of the plate fixing device, and moves the plate holding member up and down by moving the plate holding member away from the plate fixing device in the initial stage of elevating. In the final stage, the plate is moved in a direction approaching the plate fixing device.

[0018]

When replacing a printing plate, a plurality of new plates to be used are placed on top of each other while the notch of the new plate is engaged with the reference pin of the loader in advance during the printing operation. Hold on the surface. When the printing operation is completed, the loader is tilted so that the trailing edge vice faces the tip of the loader, and the gripping surface of the trailing edge vise is opened to release the old plate from the grip. In this state, the plate cylinder is rotated, and the plate gripping member in the loader grips the old plate and moves upward, whereby the old plate is held by the loader.

When the printing plate holding member is driven by the driving device after the printing plate is discharged in this manner, the plurality of printing plate holding members holding the new plate are simultaneously moved up and down with respect to the printing plate mounting surface. In the initial stage of the upward movement, the plate holding member moves in a direction away from the plate fixing device, and in the final stage of lifting and lowering, the plate holding member moves in a direction approaching the plate fixing device to disengage the notch and the reference pin. When the plate moving device is moved in the direction of the plate fixing device by another driving device, the gripping end of the new plate is inserted into the gripping surface of the plate vise, and the gripping surface closes to lock the gripping side end of the new plate. Is done.

Thereafter, the plate cylinder is rotated by about one rotation so that the rear side vice stops at a position facing the tip of the loader, and is inserted into the rear side vice of which the rear end of the new plate is open. As a result, the vice vice closes and the installation of the new version ends.

As described above, when the new plate is supplied to the plate cylinder, the plate holding member moves up and down along a locus which releases the engagement between the notch on the plate side and the reference pin on the plate mounting surface side. The plurality of printing plate holding members simultaneously move and hold the new plate at the same timing without the notch rubbing against the reference pin.

[0022]

1 to 12 show an embodiment of a plate supply device for a printing press according to the present invention. FIG. 1 is a schematic side view of a loader, FIG. 2 is a schematic side view of a printing unit provided with a loader,
3 is a front view of the old plate holding device, FIG. 4 is a side view of the upper half of the loader provided with the drive unit of the old plate pulling device, FIG. 5 is a side view of the upper half of the loader provided with the old plate pulling device, and FIG. VI in Fig. 3
7 is a side view of the plate discharge guide device, FIG. 8 is a partially cutaway front view of the plate discharge guide device, FIG. 9 is a side view of the vicinity of the plate discharge duct entrance, and FIG. 10 is provided with a plate discharge prevention device. FIG. 11 is a front view of the lower end portion of the loader provided with the plate discharge prevention device, and FIG. 12 is a side view of the new plate supply device.

In FIGS. 1 and 2, for example, a left and right frame 2 of a printing unit 1 for the first color has a plate cylinder 3 and a rubber cylinder 4 in contact with the plate cylinder 3 at both ends. A vice 5 and a vice 6 on the side of the plate extend in the axial direction of the plate cylinder 3 in the outer peripheral notch of the plate 3. The grip-side plate vise 5 includes a vise table 7 and a gripper plate 8 pivotally supported by the vise table 7. The gripper plate 8 is opened and closed by a driving device described later, and the gripper side end of the plate is opened. It is configured to include a part.

Also, the vise 6 on the rear side is composed of a vise 9 and
On the other hand, a holding plate 10 is provided so as to be swingable, and the holding plate 10 is opened and closed by an opening / closing drive device to be described later so as to hold the end of the plate at the tail side. It should be noted that the plate-holding surface of the plate-side vise 5 extends in the circumferential direction of the plate cylinder 3, and the gripping surface of the rear-side plate vise 6 is
Extending in the radial direction.

The opening / closing drive unit for the vise 5,6 will be described. An air cylinder 11 is pivotally supported on the upper end surfaces of the left and right frames 2 via a bracket 12. A tip of a rod 14 directly connected to a piston rod 13 of the air cylinder 11 is connected to the frame 2. The L-shaped lever 16 is pivotally attached to one upper end surface of an L-shaped lever 16 which is swingably supported via a bracket 15 on the upper end surface.

A lower end of a rod 17 having an upper end pivotally attached to the other free end of the L-shaped lever 16 and hanging therefrom is connected to a free end of a lever 18 pivotally attached to the frame 2 side in a swingable manner. A swing lever 19 which is pivotally mounted and is integral with the lever 18
A cam shaft (not shown) for opening and closing the grip-side vise 5 and the tail-side vise 6 is connected in a non-coupled state by a cam lever or the like (not shown). Thus, when the piston rod 13 of the air cylinder advances and retreats at a predetermined timing, the grip surfaces of the grip-side plate vise 5 and the tail-side plate vise 6 open and close at a predetermined timing.

Numeral 20 is a front-view rectangular safety cover formed by an upper cover 20a having an L-shaped cross section and a lower cover 20b having a straight cross-section pivotally connected to the lower end thereof. The lower end of the upper cover 20a is pivotally attached to the upper working end of a piston rod 23 of an air cylinder 22 pivotally supported on a vertical surface of the frame 2. Have been. By doing so, the piston rod 2 of the air cylinder 22 is
When the piston rod 23 moves forward from this state, the safety cover 20 covers the work surface side of the frame 2 as shown by a solid line in FIG. 20 is configured to open to open the work surface.

The printing unit 30 for the second color adjacent to the printing unit 1 for the first color is formed in the same manner as the printing unit 1 for the first color. An air cylinder 32 is pivotally mounted on the inner surface so as to be swingable, and the other end of a rod 34 whose one end is pivotally mounted on the inner surface of the frame 31 is pivotally connected to the working end of the piston rod 33. . Also,
One end of another rod 35 is pivotally attached to the working end of the piston rod 33, and the other end of this rod 35 is pivotally attached to an upper end of a loader 36 as a plate supply device described below.

The loader 36 will now be described. Both ends of a loader shaft 38 are rotatably supported by bearings 39 on brackets 37 fixed to the upper end surfaces of the left and right frames 31. The main body of the loader 36 has a vertically long plate-like shape. The left and right side plates 40 whose base ends are fixed to both ends of the loader shaft 38 and which are suspended therefrom, and a connecting stay (not shown) for connecting the left and right side plates 40, etc., form a rectangular frame in a front view.

The left and right side plates 4 of the main body of the loader 36 as described above.
0 has a concave hole 40a located at the upper end thereof, and a pulley shaft 42 of the bracket 41 side bolted to the end face of the side plate 40 is engaged with the concave hole 40a. A pulley 43 is rotatably fitted to each of the left and right pulley shafts 42, while a motor 44 as a driving device schematically shown in FIG. .

An endless rope 46 is stretched between the motor pulley 45 of the motor 44 and the left and right pulleys 43 with only one end crossed. 43 are configured to rotate in mutually opposite directions.

At the lower ends of the left and right loader side plates 40, tension brackets 47 are formed so as to be movable in the vertical direction and are bolted, and left and right pulleys 48 pivotally attached to the tension brackets 47 are provided. A rope 49 is stretched between the upper pulley 43 and the left and right ropes 49 are driven by a motor 44 so that the left and right ropes 49 run the inner running parts in the same direction.

The reference numeral 50 in FIG. 6 as an enlarged sectional view taken along the line VI-VI of FIG. 3 denotes a pair of left and right sides provided with a plate 51 and a holding plate 52 for holding the inner running portion of the rope 49 running up and down. The left and right plates 51 are connected by a moving bar 53, and an air cylinder 55 is fixed to a holder 54 fixed to the center of the moving bar 53.

A pinch holder 56 is fixed to the back surface of the moving bar 53 so as to correspond to the air cylinder 55. At the lower end of the pinch holder 56, a plate-like gripping member formed in a hook shape is provided. The free end is pivotally connected to the piston rod 58 of the air cylinder 55 with its free end pivotally.

Thus, when the piston rod 58 of the air cylinder 55 moves forward, the pinch 57 at the solid line position moves to the chain line position, and the bent portion of the plate 59 that has entered the loader 36 is hooked. The printing plate 59 is pulled up by the rope 49 traveling upward.

In the present apparatus, the opening and closing of the pinch 57 is performed by detection of a sensor. That is, the lower end of the loader 36 is provided with a duct 60 extending toward the lower end, and the old plate 59 released from the grip of the rear side vice 6 of the plate cylinder 3 is moved by the rotation of the plate cylinder 3 to the duct 60. Although the light enters the inside, a light emitter 61 as a fixed sensor is provided at the entry position, and a light receiver 62 as a movement sensor is provided on the pinch holder 56 side. Further, a light projector 63 corresponding to the raised light receiver 62 is fixed to a stay 64 connecting the left and right side plates 40 at the plate discharging completion position.

Thus, when the used old plate 59 enters the duct 60 while the pinch 57 is lowered, the light from the light emitter 61 to the light receiver 62 is blocked, and the piston rod 58 of the air cylinder 55 is cut off. Is moved forward, and the pinch 57 is hooked on the old edition 59. When the pinch 57 rises to the plate discharging completion position, the light from the light projector 63 to the light receiver 62 is shut off, and the air cylinder 5
5 is retracted, and the pinch 57 is
9 is configured to be released from being hooked. 65
Is a plate guide for guiding the rise of the old plate 59.

Next, a description will be given of a guide device for guiding the old plate 59 which is released from the grip of the plate vise 6 of the plate cylinder 3 and enters the duct 60 of the loader 36. That is, the loader 36
A stud 70 protrudes from the side plate 40 at a lower end of the roller. A roller lever 71 is fitted on the stud 70 so as to be rotatable while being restricted from moving in the axial direction by a snap ring 72. The free end of the roller lever 71 and the side plate 40
Between the roller lever 71 and the stud 73 projecting from
A compression coil spring 74 for urging the counterclockwise rotation in FIG. 7 is interposed.

Further, a claw shaft 75 is provided at the lower end of the loader 36.
Are rotatably supported at both ends on both side plates 40 so as to be rotatable. The gap between the free end of the lever 76 fixed to the pawl shaft 75 and the free end of the roller lever 71 is , Rod 7
7 are connected. Roller lever 71 and rod 7
A roller 79 corresponding to the bearer 3a of the plate cylinder 3 is rotatably fitted to one end of the connection pin 78 for connecting to the plate 7.
A plurality of claws 80 are fixed to the claw shaft 75.

In this manner, when the loader 36 is stored with the lower end of the loader 36 separated from the plate cylinder 3, the rollers 7
9 is separated from the bearer 3a, and the roller lever 71 is rotated counterclockwise in FIG. 7 by the resilient force of the compression coil spring 74, and the rod 77 and the lever 76 are moved to the chain line position in FIG. I'm moving. Therefore, the pawl 80 closes the entrance of the duct 60 as shown by a chain line in FIG. 9, but when the loader 36 is tilted from this state to the use state, the rollers 7
9 is pushed by the bearer 3a against the elastic force of the compression coil spring 74, so that the claw 80 is pushed through the rod 77 and the lever 76.
Is moved to the position indicated by the solid line in FIG. 9 to open the entrance of the duct 60.

Next, a stencil discharge prevention device will be described with reference to FIGS. 10 and 11. FIG. That is, a lever 81 formed in a U-shape is rotatably connected to a stay 82 connecting the left and right side plates 40 at a position close to the outer side of the inclined surface of the duct 60, and has a lower end portion. The dock 83
Is mounted below the duct 60 so that the lower half of the lever 81 is almost in contact with the inclined surface of the duct 60 between the lever 81 and the block 84 on the duct 60 side. A biasing compression coil spring 85 is interposed.

The upper end of the lever 81 is
The plate discharge operation is enabled by being brought into contact with the sensor 87 fixed to the bracket 86 on the side. In this manner, the plate discharging operation is enabled by the lever 81 contacting the sensor 87 in a normal state. However, if the old plate 59 is erroneously caught between the duct 60 and the plate cylinder 3, the old plate 59 is used. Pushes the dock 83 to rotate the lever 81,
Since the upper end of the lever 81 is separated from the sensor 87, the plate discharging operation is stopped.

Further, a plurality of rollers 89 are rotatably fitted to a lever shaft 88 rotatably supported between the left and right side plates 40 while being restricted from moving in the axial direction. A plurality of roller levers 90 are fixed to the lever shaft 88, and plate holding rollers 91 are pivotally attached to the free ends of the respective roller levers 90. A drive device (not shown) for rotating the lever shaft 88 at a predetermined timing is connected to the lever shaft 88, and the plate press roller 91 is pressed against the plate wound around the drum circumference by the rotation of the lever shaft 88. It is configured as follows.

Next, a new plate supply device for holding a new plate to be used and supplying it to the plate vise of the plate cylinder 3 will be described. That is, the loader 36, which is a mounting surface on which the printing plate is mounted,
A plurality of new editions 92 prepared in advance during the printing operation are placed and stored on the front side of the new edition 9.
The notch for positioning provided in 2 is engaged with a first reference pin 93 as a first regulating member which is located above the stored plate press roller 91 and protrudes from the surface of the loader 36. ing.

Further, a second reference pin 94 as a second regulating member projects from the surface of the loader 36 below the stored plate press roller 91. An up / down air cylinder 95 having a short stroke is mounted inside the left and right side plates 40, and the piston rod 96 and a rod 97 directly connected to the piston rod 96 rotate in an L shape toward the side plate 40. One of the free ends of the upper and lower levers 98, 99 which are freely pivoted and constitute a link mechanism together with the rod 97 is pivotally attached.

The other free ends of the levers 98, 99 are pivotally connected to upper and lower ends of a plateless rodless cylinder 100. Reference numeral 101 denotes a bracket provided by connecting the movable parts of the left and right rodless cylinders 100, and a suction port 102 as a plate holding member connected to a suction air source is mounted on a surface of the bracket.

As a result, when the piston rod 96 of the air cylinder 95 advances and retreats, the upper and lower levers 98 and 99 connected by the rod 97 rotate in synchronization with each other, and
2 moves up and down in the perspective direction with respect to the mounting surface of the new edition 92,
The movement trajectory of the suction opening 102 at the time of this ascent and descent is such that it moves up and down while moving in a direction approaching the plate vise of the plate cylinder 3 at the end of the ascent and descent at the beginning of the ascent and descent. As a result, the notch of the new edition 92 and the first reference pin 93 are disengaged without rubbing each other.

That is, when the piston rod 8 of the air cylinder 95 is retracted from the state shown in the figure, the upper and lower levers 98 and 99 connected by the rod 97 are synchronously rotated clockwise in FIG. The new plate 92 rises so as to be separated from the surface of the loader 36, which is the mounting surface, and at this time, the suction port 102 rises in a trajectory like the above-described shape, and is sucked and held by the suction port 102. New edition 9
Since the engagement between the notch 2 and the first reference pin 93 is released, when the rodless cylinder 100 is operated and the piston rod 96 of the air cylinder 95 is moved, the new edition 9
2 moves and the notch engages with the second reference pin 94,
The new version 92 is in this state, that is, the version vise 5
And is held at a printing plate insertion preparation position where preparation for insertion into the plate vise 5 is completed.

Further, in FIGS. 1 and 12, an air cylinder 105 is fixed to the left and right side plates 40, and a bracket 107 fixed to the working end of the piston rod 106 is connected to a suction air source. Mouthpiece 10
8 is attached. Thus, when the suction port 108 at the retracted position shown by the solid line in the drawing is sucking the new plate 92 having the notch engaged with the second reference pin 94, when the piston rod 106 advances, the suction port 108 Is moved to the dashed line position, and the new plate 92 is inserted into the holding surface of the holding-side plate vice 5. In this movement, the second reference pin 94 is configured to automatically enter the pin hole.

The operation of replacing the printing plate by the printing plate supply device having the above-described configuration will be described. When replacing the printing plate,
A plurality of new plates 92 to be used, which are to be used in advance, are stored on the front side of the loader 36 during the printing operation, and the notches for positioning provided in the new plate 92 project into the surface of the loader 36. The first reference pin 93 provided is engaged and held.

When the printing operation is completed, when the piston rod 23 of the air cylinder 22 is advanced, the safety cover 20 covering the working surface side is opened to open the working surface. The rod 33 is advanced to tilt the loader 36 in the suspended storage state, and the tip end thereof is brought close to the peripheral surface of the plate cylinder 3.

When the loader 36 is tilted, the rollers 79 move against the bearer 3 of the plate cylinder 3 against the elastic force of the compression coil spring 74.
a, the duct 60 is pushed as shown by a chain line in FIG.
The pawl 80 closing the entrance of the rod 77 and the lever 76
9 and the entrance of the duct 60 is automatically opened.

After the loader 36 is set in this manner, when the plate cylinder 3 rotates by a predetermined angle and the rear side vice 6 stops at a position facing the tip end of the loader 36, the air cylinder 11 operates. Then the mouth side of the vice 6 on the butt side opens,
The old plate 59 is released from the grip, and as shown in FIGS. 2 and 9, the rear end of the old plate 59 jumps out of the grip surface and comes into contact with the stopper 103.

In this state, since the plate cylinder 3 rotates, the old plate 5
9 enters the loader 36 guided by the duct 60.
At the time of entry, the pawl 80 is open as described above, so that the pawl 80 is not pressed against the old plate 59 by the spring force as in the related art, and the old plate 59 is not damaged.

When the old plate 59 enters, the projection of light from the projector 61 fixed at the entry position to the light receiver 62 of the plate holding device stopped at the lowered position is cut off, and the light receiver 62 is stopped.
From the piston rod 5 of the air cylinder 55
As 8 advances, the pinch 57 catches the bent portion of the old plate 59. At the same time, the motor 44 rotates, the pulley 43 rotates, and the inner running portion of the rope 49 runs upward, whereby the old edition 59 is pulled up.

When the pinch 57 holding the old plate 59 rises to the plate discharging completion position, the light from the light emitter 63 as the fixed sensor to the light receiver 62 as the movable sensor is cut off, and the piston rod 58 of the air cylinder 55 retreats. The pinch 57 releases the old version 59 from being hooked. The released old version 59 is stored in the loader 36 while being supported by the stopper 104 shown in FIG.

While the old plate 59 is being discharged, the new plate 92 is moved at the same time. That is, the piston rod 9 of the air cylinder 95 is
When 6 is retracted from the state shown in the figure, the levers 98 and 99 are synchronously rotated clockwise in FIG. 12, and the suction port 102 sucking the new plate 92 is moved up and down in the perspective direction with respect to the mounting surface of the new plate 92. The moving trajectory of the suction port 102 when ascending and descending is
At the beginning of the ascent and descent, it moves away from the plate vise of the plate cylinder 3 and at the end of the ascent and descent, it moves in a nearly-shaped trajectory such that it moves up and down while approaching the plate vise of the plate cylinder 3. As a result, the engagement between the notch of the new plate 92 and the first reference pin 93 is released without friction.

When the notch of the new plate 92 is disengaged from the first reference pin 93 in this way, the rodless cylinder 100 operates and the piston rod 96 of the air cylinder 95 moves. Is moved and the notch is held in a state of being engaged with the second reference pin 94. Then, the new version 92 is sucked and changed from the mouthpiece 102 to the mouthpiece 108, and the bracket 101 to which the mouthpiece 102 is attached is returned to the original position. Further, the rodless cylinder 100 also returns to the original state.

When the above-mentioned old plate 59 is discharged, the plate cylinder 3 is slightly rotated to the position where the holding plate vise 5 faces the tip of the loader 36 and stopped. 106 is advanced to move the new plate 92 is attracted to the suction port 108 so mouthpiece 108 which is mounted a bracket 107 which is fixed at its working end to move to the dashed line position from the solid line position, the addition end The part is inserted into the gripping surface of the gripping side vise 5, and the notch of the new version 92 engages with the reference pin.

Then, by closing the gripping surface, the gripping side end of the new edition 92 is gripped. The new version 92
During the movement, the second reference pin 94 is automatically immersed in the pin hole, and therefore does not touch the moving new plate 92.

Next, when the plate cylinder 3 rotates, the new plate 92 is wound around the peripheral surface of the plate cylinder 3. At this time, since the presser rollers 89 press the new plate 92, the new plate 92 is moved around the plate cylinder 3. Adhere to the surface. When the bent portion formed at the buttocks end of the new plate 92 corresponds to the gripping surface of the buttocks vise 6, the roller lever 9
0 swings and the plate press roller 91 pivotally attached to the free end pushes the bent portion of the new plate 92, and the bent portion is pushed into the gripping surface of the vice 6 on the rear side. When the grip surface is closed, the fold is securely gripped.

As described above, when the new plate 92 is supplied to the plate cylinder 3, the notch is engaged with the first reference pin 93 and the new plate 36 held by the loader 36 is supplied to the plate vise at a stretch. Instead, once the notch is engaged with the second reference pin 94 and the positioning is performed while being held by the loader 36, the plate is supplied to the plate vice and positioned, so that the suction port 102 and the suction port 108 move. The stroke is shortened, and the new edition 92 is supplied accurately without bending. Further, since the new plate 92 can be moved by half of the entire stroke during the discharging operation of the old plate 59, the supply time of the new plate 92 is reduced.

When the old plate 59 enters the duct 60, the old plate 59 is caught in the duct 60 or the device for lifting the old plate 59 stops, and the old plate 59 is caught between the duct 60 and the plate cylinder 3. In this case, when the old plate 59 pushes the dock 83 to rotate the lever 81, the upper end of the lever 81 is separated from the sensor 87, and the plate discharging operation is stopped.

The suction port 10 as a plate holding member
The mechanism for raising and lowering 2 along the trajectory described above is not limited to the link mechanism as in the present embodiment, but may be, for example, a mechanism as shown and described below. 13 and FIG. 14 are schematic front views of a plate holding member elevating device as another embodiment of the present invention. First, in FIG.
Piston rod 11 which moves forward and backward in the direction of raising and lowering suction port 102 by air of air cylinder 110 which is swingably supported by
A beam 112 is fixed to the first working end in a state parallel to the mounting surface of the new plate 92.

A support bar 114 is supported between the bars 113 supported by the left and right beams 112, and a plurality of suction ports 102 are arranged on the support bar 114. A roller 115 pivotally attached to one end of the beam 112 is pressed against a cam surface of a cam 116 fixed to the loader side plate 40 by a spring member (not shown).

With this configuration, when the new plate 92 mounted on the mounting surface is sucked by the suction port 102, the piston rod 111 of the air cylinder 110 advances to move the suction port 102 to the mounting surface. At this time, since the roller 115 goes over the peak formed on the cam surface of the cam 116 at this time, the suction port 102 moves up and down in a substantially letter-like locus as in the above-described embodiment. I do. Accordingly, the notch of the new plate 92 is disengaged from the reference pin, but at this time, the notch does not rub against the reference pin.

Next, in the embodiment shown in FIG. 14, an air cylinder 117 in place of the cam 15 in the embodiment shown in FIG. 13 makes the direction of movement of the piston rod 118 substantially perpendicular to the direction of movement of the piston rod 111. And is pivotally attached to the loader side plate 40 side so that the piston rod 1
The working end 17 is the piston rod 1 of the air cylinder 110.
11 is pivoted.

With this configuration, when the suction port 102 sucks the new plate 92, the air cylinder 110
And the air cylinder 117 operate in synchronism, and the movements of the piston rods 111 and 118 are synthesized to form the suction port 102.
Thus, the suction port 102 moves up and down along a substantially L-shaped trajectory in the same manner as in the above-described embodiments. Accordingly, the notch of the new plate 92 is disengaged from the reference pin, but at this time, the notch does not rub against the reference pin.

Each air cylinder in each of the above embodiments may be replaced with a hydraulic cylinder, a motor, or the like.
In this case, the same effect can be obtained. Further, in the embodiment shown in FIG. 12, an example is shown in which the upper and lower levers 98, 99 are connected by a rod 97 as means for synchronously swinging the upper and lower levers 98, 99. However, the present invention is not limited to this. Instead, for example, a pinion is provided on the swing shaft of the upper and lower levers 98 and 99, and these pinions are synchronously rotated by a lug that meshes with the pinion, whereby the upper and lower levers 9 are rotated.
8, 99 may be swung in synchronization.

The ball screws provided in place of the rack and the screw members provided on the levers 98 and 99 may be screwed together to swing the upper and lower levers 98 and 99 synchronously. . Further, in each of the above embodiments, the air cylinders 96, 110 and the like are provided on both the left and right sides. You may make it move.

In this embodiment, the example in which the loader 36 is dropped to the frame 31 when the loader 36 is in the retracted state is shown. 3 may be stored. Further, the loader may be incorporated in the frame 2 without providing a separate loader.

The first reference pin 93 and the second reference pin 9
Needless to say, 4 is provided at the same position as the reference pin on the plate vise 5 side in the left-right direction.

[0073]

As is apparent from the above description, according to the present invention, a plate fixing device provided on a plate cylinder for holding and moving a plate mounted on a mounting surface and moving the plate. A plate supply device of a printing press having a plate moving device for moving the plate to
A plate moving member, a plate holding member that holds the plate and is driven by a driving device to move up and down in a perspective direction with respect to the mounting surface,
A drive device for moving the plate holding member in the direction of the plate fixing device, and a lifting and lowering movement of the plate holding member,
At the beginning of elevating, the plate is moved away from the plate fixing device, and at the end of elevating, it is moved in the direction approaching the plate fixing device. The holding member holds and moves the printing plate at the same time, and the printing plate holding member holding the printing plate draws a locus that disengages the notch of the printing plate from the reference pin on the printing plate mounting surface. By moving, the holding position becomes accurate without displacement, so that the new plate is accurately inserted into the plate vise without bending, and the printing plate supply function is improved. In addition, since the notch of the new plate is disengaged from the reference pin without being rubbed by the reference pin, wear and damage of the reference pin and the printing plate are reduced, durability is improved, and the notch is caught by the reference pin. Is eliminated, and poor holding can be avoided.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a loader.

FIG. 2 is a schematic side view of a printing unit provided with a loader.

FIG. 3 is a front view of the old-version holding device.

FIG. 4 is a side view of an upper half of a loader provided with a drive unit of the old plate pulling device.

FIG. 5 is a side view of the upper half of the loader provided with the old plate pulling device.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is a side view of the plate discharge guide device.

FIG. 8 is a partially cutaway front view of the plate discharging guide device.

FIG. 9 is a side view near the entrance of the plate discharging duct.

FIG. 10 is a side view of the lower end of the loader provided with the plate discharge prevention device.

FIG. 11 is a front view of the lower end portion of the loader provided with the plate discharge prevention device.

FIG. 12 is a side view of the new plate supply device.

FIG. 13 is a schematic front view of a printing plate holding member elevating device showing another embodiment of the present invention.

FIG. 14 is a schematic front view of a plate holding member elevating device showing another embodiment of the present invention.

[Explanation of symbols]

 3 Plate cylinder 5 Side plate vise 36 Loader 92 New plate 95 Air cylinder 97 Rod 98 Lever 99 Lever 100 Rodless cylinder 101 Bracket 102 Suction port

Claims (1)

(57) [Claims] 1. A printing plate of a printing press provided with a plate moving device for holding and moving a plate mounted on a mounting surface and moving the plate to a plate fixing device provided on a plate cylinder. In the supply device, the printing plate moving device includes a printing plate holding member that holds the printing plate and is driven by a driving device to move up and down in a perspective direction with respect to the mounting surface, and moves the printing plate holding member toward the printing plate fixing device. And the lifting and lowering movement of the printing plate holding member is moved in a direction away from the printing plate fixing device in the initial stage of lifting, and is moved in a direction approaching the printing plate fixing device in the final stage of lifting and lowering. A printing plate supply device for a printing press, characterized in that the printing plate supply device is configured to perform the following operations.