JP2008055792A - Semi-automatic plate exchanging device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve an easy and automatical taking-off of a printing plate from a plate cylinder on a semi-automatic plate exchanging device and method. <P>SOLUTION: At the taking-off of the printing plate 1 from the plate cylinder 2, in a gripping tail securing mechanism 24, a gripping tail part 12 is exchanged from its secured state to a gap part 21 to its securing released state. After the securing releasing of the gripping tail part 12, the plate cylinder 2 is turned towards a direction, in which a detachable roller 6 clears over the gap part 21 as keeping the detachable roller 6 under an attached state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a semi-automatic plate changing apparatus and method in which a plate of a printing press is automatically exchanged by an operator with an auxiliary operation.

There has been proposed a semi-automatic plate replacement technique in which an operator performs an auxiliary operation when replacing a printing plate of a printing machine and the plate is replaced to some extent by automation (see Patent Documents 1 and 2).
In the case of such a semi-automatic plate changing technique, generally, when attaching the printing plate, the holding portion of the printing plate is locked to the gap portion of the printing drum, and in this state, the printing plate is placed on the outer periphery of the printing drum. Press and rotate the plate cylinder to wrap the printing plate to the periphery of the plate cylinder around the outer periphery of the plate cylinder, and then lock the holding edge to the holding edge locking member in the gap. Let

Also, when removing the printing plate, generally, the gripping edge locking member in the gap part that locks the gripping bottom part of the printing plate is switched to the unlocked state, and the gripping bottom part is removed from the gap part. To release. After that, the plate can be removed if the plate cylinder is rotated in the reverse direction of the installation.
JP-A-8-332716 Japanese Patent Laid-Open No. 2001-171085

  By the way, as shown in FIG. 7A, the printing plate has a holding portion locking groove formed in the gap portion 21 of the plate cylinder 2, with the leading end portion 11 a bent in a letter shape of the holding portion 11 of the printing plate 1. A plate presser that is inserted into 22 and locked, and a bent tip end portion 12a of the gripping bottom portion 12 of the printing plate 1 is rotatably mounted in a gripping bottom portion locking groove 23 in the gap portion 21 of the plate cylinder 2. The claw 24 is fitted to the claw 24a.

When the printing plate 1 is removed from the plate cylinder 2, as shown in FIG. 7 (b), the plate 24a is moved backward so that the engagement with the leading end 12a of the gripping bottom portion 12 of the printing plate 1 is released. The presser claw 24 is rotated backward. As a result, the gripper edge portion 12 of the printing plate 1 can be removed from the plate cylinder 2 as shown in FIG.
The plate cylinder 2 is generally in a natural state where no external force is applied, in a direction opposite to that when attached to the plate cylinder 2, that is, with the plate surface facing the outer periphery when attached to the plate cylinder 2 facing inward, Since it is configured to be in a warped state (reverse warped state), as shown in FIG. 7B, when the engagement by the claw 24a with respect to the leading end portion 12a of the gripping bottom portion 12 of the printing plate 1 is released. Due to the restoring force to the reverse warping state, the gripper bottom portion 12 is discharged out of the gap 21 as shown in FIG.

In order to prevent this, the platen end 12 slides on the plate cylinder 2 and the other end of the holding part 11 comes out of the gap 21 with the momentum at which the holding bottom part 12 is discharged out of the gap 21. Normally, an arbitrary portion of the peripheral surface of the printing plate is previously pressed by a roller (not shown).
However, when printing is performed for a long time, the printing plate 1 may be pressed against the printing drum 2 by a group of rollers in contact with the printing drum 2, and the printing plate 1 may be plastically deformed in a cylindrical shape. In some cases, ink flows around the back surface of the printing plate 1 during printing, and the printing plate 1 and the plate cylinder 2 adhere to each other due to the adhesive force.

For this reason, even if the plate presser claw 24 is rotated backward and the restraint on the gripper bottom portion 12 is released, the gripper bottom portion 12 is outside the gap 21 due to insufficient restoring force of the printing plate 1 and adhesive force to the plate cylinder 2. May not be discharged.
In this case, the printing plate 1 must be manually peeled off from the plate cylinder 2, but this places a heavy burden on the operator, and is a major problem in semi-automatic plate replacement in which plate replacement is performed as automatically as possible. ing.

  The present invention has been devised in view of such problems, and provides a semi-automatic plate changing apparatus and method which can easily and automatically remove the printing plate from the plate cylinder when changing the plate. With the goal.

  In order to achieve the above object, the semi-automatic plate changer of the present invention is a semi-automatic plate changer that performs a partly automatic operation of attaching and detaching a printing plate to and from the plate cylinder. A gripping edge locking mechanism that locks to the gap portion of the cylinder, a locking mechanism driving means that can drive the locking mechanism to release the gripping bottom locking mechanism, and the vicinity of the gripping edge part of the printing plate to the plate cylinder An attaching / detaching roller capable of taking a pressing state and a releasing state in which the vicinity of the gripper butt portion is released from the plate cylinder; and a roller attaching / detaching driving means for driving the attaching / detaching roller between the wearing state and the releasing state; Rotation drive means for rotating the plate cylinder, and when the printing plate is removed from the plate cylinder, the gripper buttocks locking mechanism is changed from a state in which the gripper buttocks are locked to the gap part to an unlocked state. Control the locking mechanism drive means to switch At the same time, after releasing the locking of the gripping buttocks, the rotation driving means is controlled so that the detachable roller rotates the plate cylinder in a direction over the gap while the detachable roller remains in the wearing state. It is characterized by having control means.

The holding bottom portion of the printing plate is locked to the gap portion with a portion of the holding bottom portion along the outer surface of the plate cylinder protruding from the gap portion of the plate cylinder. It is preferable.
A discharge detecting means for detecting whether or not the gripper edge of the printing plate has been discharged from the gap portion of the plate cylinder; and a warning means for outputting warning information; and the control means comprises the gripper After the release of the butt portion, when the plate cylinder is rotated with the detachable roller in the wearing state and the detachable roller gets over the gap portion, receiving the detection information from the discharge detecting means, If the portion is not discharged from the gap portion, it is preferable to control the warning means so as to interrupt the subsequent plate removal control and output warning information that the discharge of the gripper bottom portion has failed. .

  The semi-automatic plate replacement method of the present invention includes a gripping edge locking mechanism that locks a gripping bottom portion of a printing plate with a gap portion of a plate cylinder, and a locking mechanism driving means that can drive the gripping bottom locking mechanism to unlock. An attaching / detaching roller capable of taking a wearing state in which the vicinity of the holding butt portion of the printing plate is pressed against the plate cylinder and a releasing state in which the vicinity of the holding butt part is released from the plate cylinder, and the attaching / detaching roller to the attaching plate. A semi-automatic plate changer comprising a roller attaching / detaching driving means for driving between a state and the detached state, and a rotational driving means for rotating the plate cylinder, and a partly automatic attachment / detachment operation of the printing plate to / from the plate cylinder A semi-automatic plate changing method in which the plate is exchanged semi-automatically by the above-described method, and when the printing plate is removed from the plate cylinder, the gripper edge locking mechanism is engaged from the state where the gripper edge portion is locked to the gap portion. Said locking machine to switch to the unlocking state After driving the driving means and releasing the locking of the gripper buttocks, the rotational drive is performed so that the plate cylinder rotates in a direction in which the detachable roller gets over the gap while the detachable roller remains in the wearing state. It is characterized by operating the means.

  Also in this case, the gripping bottom portion of the printing plate is related to the gap portion in a state where a portion of the gripping bottom portion along the outer surface of the plate cylinder protrudes from the gap portion of the plate cylinder. It is preferably stopped.

  According to the semi-automatic plate changing apparatus or the semi-automatic plate changing method of the present invention, when the printing plate is removed from the plate cylinder, the gripper bottom locking mechanism is switched from the state where the gripper bottom portion is locked to the gap portion to the unlocked state. After unlocking the gap between the top and bottom edges, the plate cylinder is rotated in a direction in which the detachable roller gets over the gap while the detachable roller remains in the wearing state. When the attached detachable roller gets over the gap, the detachable roller comes off from the gripper edge of the printing plate, and the pressing force that the detachable roller has pressed against the plate drum until then is released suddenly. Therefore, this acts as a force for discharging the gripping bottom portion out of the gap. For this reason, even if the restoring force of the printing plate is insufficient or the adhesive force between the printing plate and the plate cylinder is generated, the gripper edge tends to be discharged out of the gap, and the plate can be easily removed from the plate cylinder when replacing the plate. It can be removed automatically.

  In particular, when the holding bottom portion of the printing plate is locked to the gap portion, the portion of the holding bottom portion along the outer surface of the plate cylinder protrudes from the gap portion of the printing drum. When the attaching / detaching roller reaches the gap portion, the attaching / detaching roller presses the protruding portion (hereinafter referred to as the protruding portion) toward the center of the plate cylinder. Displacement toward the center of the plate cylinder with the edge of the gap portion as a fulcrum. As a result, a portion of the printing plate adjacent to the projecting portion that is wound around the outer periphery of the plate cylinder is displaced in a direction away from the outer periphery of the plate cylinder with the edge of the gap portion as a fulcrum. In this way, when the printing plate is displaced in the direction away from the outer periphery of the plate cylinder, the printing plate and the plate cylinder are separated from each other, and not only the adhesive strength of this portion disappears but also the adhesive strength in the vicinity of this portion. Is also reduced. For this reason, it becomes easier to discharge | emit a grip bottom part out of a gap.

  In addition, a discharge detecting means for detecting whether or not the gripper edge of the printing plate has been discharged from the gap portion of the plate cylinder and a warning means for outputting warning information are provided, and after the grip of the gripper is released, it can be attached and detached. If the roller is put on and the plate cylinder is rotated, and the detachable roller gets over the gap, the detection information from the discharge detection means at this time is received, and if the gripper is not discharged from the gap, the subsequent plate If the removal control of the gripper bottom part is output and warning information is output indicating that the gripper bottom part has failed, even if the gripper part discharge fails, the plate must be removed manually and securely. Since it can be recovered, there is no problem that the next process is performed while the gripper bottom portion has failed to be discharged.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 6 illustrate a semi-automatic plate changing apparatus and method according to an embodiment of the present invention, which will be described with reference to these drawings.
First, the configuration of the main part of the semi-automatic plate changer according to this embodiment will be described. 1 to 5 showing the present embodiment, the vertical direction of the drawing is described so as to correspond to the vertical vertical direction (the vertical downward direction is the direction of gravity). 6 is located, and can be applied to a B stack or a D stack in a printing unit of a newspaper rotary press. However, in the case of an A stack or a C stack, the rollers 5 and 6 are disposed substantially above the plate cylinder 2. The positional relationship of the rolls 5 and 6 with respect to the plate cylinder 2 can be set as appropriate, such as being positioned.

In this semi-automatic plate changer, when the printing plate 1 is attached to the plate cylinder 2 (at the time of plate attachment), the gripper 11 of the printing plate 1 is manually locked to the gap portion 21 of the plate cylinder 2 by the operator. After that, the printing plate 1 is automatically wound around the plate cylinder 2, and the holding bottom portion 12 of the printing plate 1 is locked to the gap portion 21 of the plate cylinder 2.
For this reason, as shown in FIG. 2, this semi-automatic plate changer includes a plate presser roller 5 capable of taking a state in which the plate 1 is pressed against the plate cylinder 2 and a state in which the plate 1 is released from the plate cylinder 2. A first air cylinder (roller attaching / detaching drive means) 5a for driving the plate pressing roller 5 between the attached state and the detached state, and a plate cylinder rotating motor (rotation driving means) 9 for rotating the plate cylinder 2; Is provided.

  Further, below the plate pressing roller 5, there can be a worn state in which the printing plate 1 is pressed against the plate cylinder 2 and a detached state in which the printing plate 1 is released from the plate cylinder 2. A plate holding butt attaching / detaching roller (detachable roller) 6 used for attaching and detaching the portion 12 to and from the plate cylinder 2 is provided adjacent to the plate pressing roller 5 in a tendency. A second air cylinder 6a is provided which is driven between the attached state and the detached state. Since the plate holding edge attaching / detaching roller 6 requires a larger amount of forward / backward movement than the plate pressing roller 5, the second air cylinder 6a has a larger expansion / contraction stroke than the first air cylinder 5a.

  Further, when the plate 1 is fixed by fixing the gripping bottom portion 12 of the printing plate 1 to the gap portion 21 of the plate cylinder 2 when the plate is attached, the leading end portion 12 a of the gripping bottom portion 12 is placed in the gap portion 21. The plate presser claw 24 is engaged with the claw portion 24a. For this reason, a plate presser claw 24 is provided in the gripper bottom portion locking groove 23 formed in the gap portion 21, and the plate presser claw 24 is held by the gripper bottom portion. A tension bar 25 that is urged by a spring (not shown) in a rotational direction for locking 12 is rotatably provided. Then, as shown in FIG. 3, at the end of the tension bar 25, there is a plate clamping lever 26 and a side on which the plate clamping lever 26 is appropriately pressed and the tension bar 25 is added to release the lock of the bottom portion 12. A plate-clamping roller 7 for rotating the plate-clamping roller 7 and a third air cylinder (locking mechanism driving means) 7a for moving the plate-clamping roller 7 forward and backward are provided. The gripper edge locking mechanism includes a plate presser claw 24, a tension bar 25, a plate clamping lever 26, and a plate clamping roller 7.

A first air cylinder 5a that supports the plate presser roller 5 for rotation and is driven forward / backward, a second air cylinder 6a that supports the plate holder butt mounting / removal roller 6 for rotation and is driven forward / backward, and a plate clamping roller. Each of the third air cylinders 7a, which is supported in a freely rotating manner and is driven forward and backward, is supported by a support frame 8 on the side of the printing press via a bracket 8a.
A controller (control means) 30 for controlling the operations of the first air cylinder 5a, the second air cylinder 6a, the third air cylinder 7a, and the plate cylinder rotating motor 9 is provided.

  Further, as shown in FIG. 1, in the portion where the vicinity of the holding edge 12 of the gap portion 21 of the plate cylinder 2 is joined, the holding edge 12 of the printing plate 1 becomes the gap portion of the plate cylinder 2 when the plate is removed. A proximity sensor 31 is provided as a detecting means for detecting whether or not the ink is discharged to the outside, and a detection signal is input to the controller 30 as shown in FIG. The proximity sensor 31 outputs an ON signal when the printing plate 1 is in contact (or within a certain range) with the outer periphery of the plate cylinder 2, and the printing plate 1 is separated from the outer periphery of the plate cylinder 2 (or more than a certain level). If it is in a state of being separated, OFF is output, but the detection means is not limited to the proximity sensor 31 as long as it can detect whether or not the gripper end portion 12 is discharged out of the gap portion 21.

Further, as shown in FIG. 2, when the gripping bottom portion 12 is not discharged out of the gap portion 21 (discharge failure), an alarm (warning means) 32 so as to output an alarm (warning information) to that effect. Is provided.
The controller 30 controls each operation of the first air cylinder 5a, the second air cylinder 6a, the third air cylinder 7a, and the plate cylinder rotating motor 9 in consideration of the signal from the proximity sensor 31, and also the alarm 32 Control the operation.

This semi-automatic plate changer is characterized by the control of each air cylinder 5a, 6a, 7a (in the case of this embodiment, this control is performed by the controller 30).
In particular, regarding the plate removal in the plate exchange process, as shown in FIG. 1, the controller 30 operates the gripper buttocks locking mechanism in a state where the gripper buttocks 12 is locked to the gap portion 21 (plate presser claw). The air cylinder 7a is controlled so as to switch from the state in which the 24 claws 24a are engaged with the gripping buttocks 12) to the unlocked state (the state in which the pawls 24a of the plate presser claw 24 are unlocked in the holding buttocks 12). At the same time, after the release of the gripper buttocks 12, the platecushion butt mounting / removing roller 6 rotates the plate cylinder 2 in such a direction as to pass over the gap portion 21 while the plate gripper butterfly mounting / removing roller 6 remains in the worn state. The second air cylinder 6a and the plate cylinder rotating motor 9 are controlled.

  Further, after the holding of the gripper buttocks 12 is released, the plate cylinder 2 is rotated with the plate gripper buttocks mounting / removing roller 6 in the wearing state, and the plate gripping buttocks mounting / dismounting roller 6 gets over the gap 21, the proximity sensor 31 In response to the detection information, if the gripper buttocks 12 are not ejected from the gap portion 21, the subsequent plate removal control is interrupted, and warning information to the effect that ejection of the gripper buttocks 12 has failed is output. The alarm 32 is controlled.

In the following, both plate attachment and removal will be described in the plate exchange process.
The controller 30 controls the air cylinders 5a, 6a, and 7a as shown in FIG. 4 when the printing plate 1 is attached to the plate cylinder 2. That is, first, the plate cylinder 2 is stopped at the plate hanging position (step a10). As shown in FIG. 4 (a), the plate cylinder 2 is positioned so that the gap portion 21 of the plate cylinder 2 is slightly below the plate presser roller 5 and the plate holding edge attaching / detaching roller 6. It is a state to do. The plate cylinder 2 may be manually stopped at the plate hanging position. However, in the case of this embodiment, the controller 30 causes the plate cylinder 2 to be moved by inputting a plate attachment start command (not shown) to the controller 30. It is designed to automatically stop at the plate hanging position.

  Next, in this state, printing is performed by the operator (step a20). In this printing, as shown in FIG. 4B, the holding portion 11 (details) of the printing plate 1 is inserted into the gap portion 21 (not shown in detail, but the holding portion locking groove 22 of the gap portion 21). Although not shown, the bent end portion 11a) of the holding portion 11 is hooked and locked. In this state, both the plate pressing roller 5 and the plate holding edge attaching / detaching roller 6 are in a detached state.

  From this state, the plate cylinder 2 is rotated forward (step a30). The normal rotation is a direction in which the printing plate 1 is wound around the plate cylinder 2 [clockwise direction as indicated by an arrow in FIG. 4C]. When the plate cylinder 2 is rotated forward, the plate 1 comes into contact with the plate pressing roller 5. In general, the plate 1 is curved in a direction away from the plate cylinder 2 opposite to the direction of winding around the plate cylinder 2, so that the gap portion 21 of the plate cylinder 2 is rotated by the plate presser roller 5 by the rotation of the plate cylinder 2. The plate 1 comes into contact with the plate pressing roller 5 even when the plate pressing roller 5 is in the detached state. The location where the printing plate 1 comes into contact with the plate pressing roller 5 is a location separated from the bent portion 11c of the holding portion 11 of the printing plate 1 by a predetermined distance (here, 8.12 mm) or more (step a40). As shown in FIG. 4D, the plate pressing roller 5 is put on (step a50).

From this state, the plate cylinder 2 is rotated approximately once and then stopped (step a60). As a result, as shown in FIG. 4 (e), the holding bottom portion 12 of the printing plate 1 approaches the gap portion 21 of the plate cylinder 2.
Here, the plate clamping roller 7 is put on (step a70), and the tension bar 25 rotates backward through the plate clamping lever 26 to retract the claw portion 24a of the plate presser claw 24. As a result, the leading end 12a of the gripper bottom portion 12 of the printing plate 1 bent into the hook shape can enter the gripper bottom portion engaging groove 23 without any trouble. Thereafter, the plate holding edge attaching / detaching roller 6 is put on (step a80), and as shown in FIG. 4 (f), the leading end portion 12a of the holding edge portion 12 of the printing plate 1 is held in the gap portion 21 of the plate cylinder 2. It enters into the buttocks locking groove 23.

Thereafter, the plate clamping roller 7 is removed (step a90), and the tension bar 25 is rotated forward by the urging force (return spring) to advance the claw portion 24a of the plate presser claw 24. As a result, the leading end 12 a of the gripping bottom portion 12 of the printing plate 1 is locked to the claw portion 24 a of the plate pressing claw 24, and the gripping bottom portion 12 is fixed to the gap portion 21 of the plate cylinder 2.
Thereafter, the plate holding edge attaching / detaching roller 6 is removed (step a100), and the plate pressing roller 5 is removed (step a110), so that the plate cylinder 2 of the printing plate 1 as shown in FIG. Installation to is completed.

In the present embodiment, the above steps a10 and a30 to a110 are automatically performed by the control through the controller 30, but some or all of the commands for each operation are performed by the operator's operation. It may be.
On the other hand, the controller 30 controls the air cylinders 5a, 6a, and 7a as shown in FIG. 5 when the printing plate 1 is detached from the plate cylinder 2. That is, first, the plate cylinder 2 is stopped at the plate removal position (step b10). As shown in FIG. 5 (a), the plate removing position of the plate cylinder 2 is such that the gap portion 21 of the plate cylinder 2 is positioned slightly below the plate pressing roller 5 and the plate holding butt attaching / detaching roller 6. It is in a state close to the plate hanging position. The stop of the plate cylinder 2 at the plate removal position may be manually performed, but in the case of this embodiment, the controller 30 inputs the plate removal start command (not shown) to the controller 30 so that the controller 30 removes the plate cylinder 2 from the plate cylinder 2. It is designed to automatically stop at the removal position.

Next, as shown in FIG. 5 (b), the plate pressing roller 5 is put on (step b20), the plate holding tail attaching / detaching roller 6 is also put on (step b30), and the plate clamping roller 7 is also put on (step b30). Step b40).
From this state, the plate cylinder 2 is rotated forward (step b50). Then, as shown in FIG. 5 (c) and FIGS. 1 (a) and 1 (b), when the plate holding tail mounting / removing roller 6 gets over the gap portion 21 of the plate cylinder 2 (step b60), the plate cylinder 2 is stopped (step b70). Here, as shown in FIG. 5 (d), the plate holding butt mounting removal roller 6 is removed (step b80). In the state shown in FIGS. 5C and 5D, the leading end 12 a of the holding bottom portion 12 of the printing plate 1 is released from the locking of the claw portion 24 a of the plate pressing claw 24 in the gap portion 21 of the plate cylinder 2. Further, the holding bottom portion 12 is detached from the gap portion 21 of the plate cylinder 2.

  In this state, when the plate cylinder 2 is reversed (step b90), just before the plate cylinder 2 makes one round, only the holding portion 11 of the printing plate 1 is attached to the plate cylinder 2 as shown in FIG. After being locked by the gap portion 21, the gripper is released from the locking of the claw portion 24 a of the plate presser claw 24, which is hung down by its own weight, and the gripping butt portion 12 is detached from the gap portion 21 of the plate cylinder 2. When the plate cylinder 2 further rotates and makes one round from the start of reverse rotation, as shown in FIG. 5 (f), the holding portion 11 of the printing plate 1 can be detached from the gap portion 21 of the plate cylinder 2, and the plate cylinder 2 Is stopped (step b100), the plate pressing roller 5 is removed (step b110), and the printing plate 1 is removed by the operator. Thereby, as shown in FIG. 5G, the removal of the printing plate 1 from the plate cylinder 2 is completed.

  In the present embodiment, the above steps b10 to b110 are automatically performed by the control through the controller 30, but some or all of the commands for each operation are performed by the operator's operation. Also good.

  The semi-automatic plate change apparatus and method according to an embodiment of the present invention is configured as described above. When the printing plate is removed from the plate cylinder, as shown in FIG. From the state in which the gripper butt portion 12 is locked to the gap portion 21 (the state in which the claw 24a of the plate presser claw 24 is locked to the gripper butt portion 12), the state in which the grip is released (the claw 24a of the plate presser claw 24 is held in the gripper butt portion 12). 1), and the butt portion 12 is released from the gap 21 and the detachable roller 6 is left in the attached state as shown in FIG. 1B. The plate cylinder 2 is rotated in the direction over the gap portion 21.

  When the plate holding butt attaching / detaching roller 6 in the wearing state gets over the gap portion, the plate holding butt attaching / detaching roller 6 comes off from the holding butt portion 12 of the printing plate 1, and until then, the plate holding butt attaching / detaching roller 6 is moved to the printing plate 1. Since the pressing force that has pressed the holding butt portion 12 against the plate cylinder 2 is suddenly released, this acts as a force for discharging the holding butt portion 12 out of the gap 21. For this reason, even if the restoring force of the printing plate 1 is insufficient or the adhesive force between the printing plate 1 and the plate cylinder 2 is generated, the gripper edge portion 12 is easily discharged out of the gap 21, and the printing plate 1 is removed when the plate is replaced. It can be easily and automatically removed from the plate cylinder 2.

  In particular, in the present embodiment, as shown in FIG. 1A, the outer edge of the plate cylinder 2 of the gripper bottom portion 12 is formed in a state where the gripper bottom portion 12 of the printing plate 1 is locked to the gap portion 21. Since the portion along the gap protrudes from the gap portion 21 of the plate cylinder 2, when the plate holding butt attaching / detaching roller 6 reaches the gap portion 21, the plate holding butt attaching / detaching roller 6 is added. Since the portion (protruding portion) protruding from the gap portion 21 of the butt portion 12 is pressed toward the center of the plate cylinder 2, the protruding portion is centered on the edge of the gap portion 21 of the plate cylinder 2 in the center direction. It is displaced to.

  As a result, a portion of the printing plate 1 adjacent to the protruding portion that is wound around the outer periphery of the plate cylinder 2 is displaced in a direction away from the outer periphery of the plate cylinder 2 with the edge of the gap portion 21 as a fulcrum. As described above, when the printing plate 1 is displaced in the direction away from the outer periphery of the plate cylinder 2, the printing plate 1 and the plate cylinder 2 are separated from each other, and not only the adhesive force of this part disappears but also the Also reduces the adhesive strength in the vicinity. For this reason, the gripper bottom portion 12 is more easily discharged out of the gap.

Further, regarding the plate removal, in consideration of the failure of the removal, a process as shown in FIG. 6 is also performed.
In other words, a proximity sensor that detects the proximity of the gripper buttocks 12 near the gap 21 of the plate cylinder 2 (on in the proximity of the gripper buttocks 12 locked, and off in the separated state of the gripper buttocks 12 removed) Based on the on / off signal from 31, it is determined whether or not the attempt to eject the holding edge 12 of the printing plate 1 has been successful or unsuccessful (step S 10), and if successful (when the proximity sensor 31 is off), the plate holding When the bottom mounting roller 6 is detached from the plate cylinder 2 and the plate cylinder 2 is rotated backward by one turn to remove the printing plate 1 (step S20), but fails (when the proximity sensor 31 is on), The operation of removing the printing plate 1 by rotating the printing drum 2 backward by one turn in a detached state in which the plate holding butt mounting removal roller 6 is separated from the printing drum 2 is stopped, and an alarm or the like is warned (step S30). Remove manually. Flop S40).

  As a result, even in a situation where the discharge of the gripper edge 12 of the printing plate 1 fails, the plate 1 can be reliably removed and collected manually, so that the discharge of the gripper edge 12 is prevented. The failure that the next process is performed without failing does not occur.

[Others]
As mentioned above, although embodiment of this invention was described, this invention is not limited to the above-mentioned embodiment.
For example, in the above-described embodiment, the plate retainer attaching / detaching roller 6 is provided together with the plate retainer attaching / detaching roller 6. However, in the present invention, at least one plate retainer attaching / detaching roller 6 or a roller corresponding thereto is provided. Good.

  In the above embodiment, the controller 30 automatically attaches and detaches the plate gripper assembling / removing roller 6 and rotates the plate cylinder 2. However, as described in the above embodiment, the method of the present invention. In this case, the plate holder butt mounting / removing roller 6 may be attached and detached and the plate cylinder 2 may be rotated by an operator's operation.

It is sectional drawing of the principal part of a printing plate and a plate cylinder which shows the characteristic of the semi-automatic plate change technique concerning one Embodiment of this invention. It is a block diagram which shows the principal part (especially a plate press roller, a plate holding edge attaching / detaching roller) of the semi-automatic plate change apparatus concerning one Embodiment of this invention. It is a block diagram which shows the principal part (especially plate clamping roller) of the semi-automatic plate change apparatus concerning one Embodiment of this invention. It is a flowchart which attaches plate cylinder sectional drawing and attaches the plate attachment procedure by the semi-automatic plate change technique concerning one Embodiment of this invention. It is a flowchart which attaches plate cylinder sectional drawing and shows the plate removal procedure by the semi-automatic plate change technique concerning one Embodiment of this invention. It is a flowchart explaining removal of the plate by the semi-automatic plate replacement technique according to one embodiment of the present invention. It is sectional drawing of the principal part of the printing plate and plate cylinder which demonstrates the order of (a)-(c) about the removal of the plate by a general semi-automatic plate exchange technique.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printing plate 2 Plate cylinder 5 Plate pressing roller 5a 1st air cylinder (roller attachment / detachment drive means)
6 version Mouth ass wearing roller (detachable roller)
6a 2nd air cylinder 7 Plate clamping roller
7a Third air cylinder (locking mechanism driving means)
8 Support frame 8a Bracket 9 Plate cylinder rotation motor (rotation drive means)
DESCRIPTION OF SYMBOLS 10 Safety cover 11 Clamping part 11a Tip part of the holding part 11 12 Clamping butt part 12a Tip part of the cuffing bottom part 12 Gap part 22 Clamping part locking groove 23 Clinging part locking groove 24 Plate presser claw mechanism)
24a Claw part of plate presser claw 24 25 Tension bar (holding edge locking mechanism)
26 Plate clamping lever (holding edge locking mechanism)
30 controller (control means)
31 Proximity sensor (detection means)
32 Alarm (Warning means)

Claims (5)

It is a semi-automatic plate changer that performs part of the plate plate attachment / detachment operation automatically.
A gripping edge locking mechanism for locking the gripping edge of the printing plate to the gap of the plate cylinder;
A locking mechanism driving means capable of unlocking and driving the holding lip locking mechanism;
A detachable roller capable of taking a wearing state in which the vicinity of the gripping bottom portion of the printing plate is pressed against the plate cylinder and a releasing state in which the vicinity of the gripping bottom portion is released from the plate cylinder;
Roller attachment / detachment drive means for driving the attachment / detachment roller between the wearing state and the removal state;
Rotation driving means for rotating the plate cylinder;
When the printing plate is detached from the plate cylinder, the holding mechanism driving means is controlled so that the gripper edge locking mechanism is switched from a state in which the gripping edge portion is locked to the gap portion to a lock released state. And the rotation driving means is controlled to rotate the plate cylinder in a direction in which the attachment / detachment roller passes over the gap portion while the attachment / detachment roller remains in the wearing state after the lock of the gripping bottom portion is released. A semi-automatic plate changer characterized by comprising control means for performing The holding bottom portion of the printing plate is locked to the gap portion with a portion of the holding bottom portion along the outer surface of the plate cylinder protruding from the gap portion of the plate cylinder. The semi-automatic plate changer according to claim 1, wherein: A discharge detecting means for detecting whether or not the gripping bottom portion of the printing plate is discharged from the gap portion of the plate cylinder;
A warning means for outputting warning information; and
The control means detects detection information from the discharge detecting means when the plate cylinder is rotated while the attaching / detaching roller is in the wearing state and the attaching / detaching roller gets over the gap portion after releasing the locking of the gripping bottom portion. In response, if the gripper buttocks is not discharged from the gap part, the subsequent plate removal control is interrupted and the warning information is output to the effect that discharge of the gripper buttocks has failed. The semi-automatic plate changer according to claim 1 or 2, wherein the means is controlled. A gripper bottom locking mechanism that locks the gripper bottom of the printing plate to the gap of the plate cylinder,
A locking mechanism driving means capable of unlocking and driving the holding lip locking mechanism;
A detachable roller capable of taking a wearing state in which the vicinity of the gripping bottom portion of the printing plate is pressed against the plate cylinder and a releasing state in which the vicinity of the gripping bottom portion is released from the plate cylinder;
Roller attachment / detachment drive means for driving the attachment / detachment roller between the wearing state and the removal state;
A rotation driving means for rotating the plate cylinder;
A semi-automatic plate change method for semi-automatically changing a plate by a semi-automatic plate changer that performs partly automatic attachment / detachment of the printing plate to the plate cylinder,
When removing the printing plate from the plate cylinder,
Operating the locking mechanism driving means to switch the gripper buttocks locking mechanism from a state in which the gripper buttocks are locked to the gap portion to a locked release state;
After the release of the gripping butt portion, operating the rotation drive means so that the plate cylinder rotates in a direction in which the detachable roller gets over the gap portion while the detachable roller remains in the wearing state. A semi-automatic version change method. The holding bottom portion of the printing plate is locked to the gap portion with a portion of the holding bottom portion along the outer surface of the plate cylinder protruding from the gap portion of the plate cylinder. The semi-automatic plate changing method according to claim 4, wherein:

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