JP2609216B2 - Plate mounting device - 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 plate mounting apparatus for a rotary printing press, and more particularly, to a printing plate after one of two parallel sides is engaged with a plate cylinder. While the other side of the printing plate is bent toward the plate cylinder by an angle smaller than 90 degrees,
The present invention relates to a plate mounting device that is inserted into a narrow groove that opens on the peripheral surface of a plate cylinder.

[0002]

2. Description of the Related Art Various types of printing plate mounting devices for a rotary printing press have been disclosed.
A device which has a roller capable of pressing the printing plate against the peripheral surface of the plate cylinder when the plate is near-displaced, and which presses one side of the printing plate against the plate cylinder by this roller is, for example, a special device. Japanese Laid-Open Patent Application No. 62-169646, "A device for inserting the rear end of a plate in a plate cylinder of a printing press" (conventional example 1),
Japanese Utility Model Laid-open No. 2-27339, "Automatic printing plate attaching / detaching device" (Conventional Example 2), Japanese Utility Model Laid-open No. 2-101737, "Printer holding device for plate cylinder" (Conventional Example 3), Japanese Utility Model Laid-Open No. 4-81752, "Plate" Pressing roller indicating device ”(Prior art example 4),
Japanese Unexamined Patent Publication No. 77401, "Printing plate attaching / detaching device" (conventional example 5) is known.

[0003] Of these known devices, any of the conventional devices 2 to 4 are designed so that the printing plate does not separate from the peripheral surface of the plate cylinder when the printing plate is wound around the plate cylinder. The printing plate is pressed substantially evenly in parallel with the axis of the plate cylinder.

In the conventional example 2, the roller is connected to a driving motor via a clutch, and the roller is pressed against the peripheral surface of the plate cylinder for rotating the printing plate. The plate is rotated or stopped at an arbitrary rotation speed in an appropriate direction, and the plate is pulled using the frictional force between the plate and the roller, so that the plate wound around the plate cylinder does not sag. Is configured to give an appropriate tension to the

[0005] Further, the one shown in Conventional Example 4 is provided with a light brake mechanism for slightly restraining the rotation of the roller,
By pressing the plate against the peripheral surface of the rotating plate cylinder with these rollers, slightly restricting the rotation of the roller, winding the plate around the plate cylinder by pulling the plate and winding it around the plate cylinder. Is configured.

On the other hand, each of the conventional examples 1 and 5 is referred to as a so-called plate vise in which a side portion of a printing plate is sandwiched by two members provided on a plate cylinder. There is a roller for inserting the other side of the printing plate between the two members of the plate mounting device.

In the conventional example 1, a roller pressing a printing plate against a rotating plate cylinder is moved and displaced in accordance with the peripheral surface of the plate cylinder. Between the two sides of the printing plate displaced to near the tips of the two members for holding the plate, ironing near the other side of the printing plate and opening the two sides of the printing plate to receive the other side of the printing plate. It is configured to feed the other side.

In the prior art 5, a plate of a plate mounting device which is opened to receive the other side of the plate is held separately from a roller for pressing the plate against the rotating plate cylinder. A roller for feeding the other side of the printing plate is provided between the two members, and the roller is connected to a swinging arm supporting the roller by a driving member called a forward / backward moving cylinder via a link mechanism. It is configured to move and displace toward the open ends of the two members, and to feed the other side of the printing plate pressed against the plate cylinder by the rollers between the two opened members.

[0009]

[Problem to be Solved by the Invention] By the way, Conventional Example 2
In the conventional examples shown in Nos. 1 to 4, the mechanism is simple, and the printing plate whose one side is engaged with the plate cylinder is pressed against the peripheral surface of the plate cylinder,
A printing plate that is wound around the peripheral surface of the plate cylinder by rotation of the plate cylinder can be wound in a state in which it is firmly in contact with the peripheral surface of the plate cylinder. It cannot be inserted into a narrow groove provided in the body.

Conventional examples shown in Conventional Examples 1 and 5 are as follows.
The printing plate, one side of which was engaged with the plate cylinder, was pressed against the peripheral surface of the plate cylinder by a roller, and was pressed by the roller, and wound around the plate cylinder in a state of firmly contacting the peripheral surface of the plate cylinder. This is a device for inserting the other side of the plate between two members of a plate vise, which is a plate mounting device provided on the plate cylinder.

However, the prior art 1 requires a mechanism for positioning the other side of the printing plate at the open end of the two members.
A roller for feeding the other side of the printing plate between the two members, separately from a roller for pressing the printing plate against the peripheral surface of the plate cylinder, and displacing the roller near the plate cylinder to displace the printing plate. A mechanism for pressing the other side of the to the plate cylinder,
A mechanism for displacing and moving the roller with the other side of the printing plate pressed against the plate cylinder toward the two members is required.

In any case, the operating mechanism is complicated, the manufacturing cost and the running cost such as maintenance are high,
In addition, there were relatively many troubles caused by complexity.

According to the present invention, the printing plate having one side engaged with the plate cylinder is pressed against the peripheral surface of the plate cylinder, and the printing plate is securely wound around the peripheral surface of the plate cylinder in cooperation with the rotation operation of the plate cylinder. At the same time, by providing an extremely simple mechanism that allows the other side of the wound printing plate to be inserted into a narrow groove provided on the peripheral surface of the printing plate, the manufacturing cost can be reduced, maintenance, etc. The purpose of the present invention is to reduce the running cost and reduce trouble and improve work efficiency.

[0014]

Means for Solving the Problems The present invention provides

It has a narrow groove which can be stopped at a predetermined rotational phase and is parallel to the axis and open to the peripheral surface. One of two parallel sides is engaged with the groove in this groove. The other side of the printing plate is bent toward the plate cylinder by an angle smaller than 90 degrees and the engagement portion formed is inserted. A printing plate holding roller capable of pressing the printing plate against the plate cylinder when the printing plate is pressed close to the printing drum when the printing plate is near-displaced; and a driving unit capable of rotating and stopping the printing plate holding roller. The printing plate is wound around the plate cylinder by rotating the plate cylinder while pressing the plate onto the plate cylinder, and the printing plate is selectively made to rotate and stop the plate holding roller in relation to the operation of the plate cylinder. The tip of the engaging portion on the other side of the plate is brought into contact with the peripheral surface of the plate cylinder, Plate mounting apparatus characterized by the opening position of the groove of the rotating narrow to the contact position is provided so as to match the, and

A clutch mechanism capable of disconnecting the link between the plate holding roller and the driving means is provided so that the plate holding roller can selectively perform three states of driving rotation, stop, and free rotation in association with the operation of the plate cylinder. 2. The method according to claim 1, wherein
Plate mounting device described in

And

It has a narrow groove which can be stopped at a predetermined rotation phase and is parallel to the axis and open to the peripheral surface. One of two parallel sides is engaged with the groove in this groove. A plate cylinder on which the printing plate is mounted by inserting an engaging portion formed by bending the other side of the printing plate toward the plate cylinder by an angle smaller than 90 degrees, and a peripheral surface of the plate cylinder A plate holding roller capable of pressing the printing plate against the plate cylinder when the plate is fixed to the plate cylinder when the plate holding roller is displaced in a near and far direction, and braking means capable of braking and rotating the plate holding roller. While rotating the plate cylinder while holding the plate against the plate cylinder, the printing plate is wound around the plate cylinder, and the plate holding roller is selectively operated in two modes, braking rotation and stop, in association with the operation of the plate cylinder. With the tip of the engaging portion on the other side of the plate abutting on the peripheral surface of the plate cylinder, Plate mounting apparatus characterized by comprising as to match the opening position of the groove of the narrow rotate the cylinder to the contact position,

And

It has a narrow groove which can be stopped at a predetermined rotation phase, is parallel to the axis and is open on the peripheral surface. The groove has a groove on one side of which is engaged with the plate cylinder. A plate cylinder on which the printing plate is mounted by inserting an engagement portion formed by bending the other side to the plate cylinder side by an angle smaller than 90 degrees, and a perspective displacement with respect to the peripheral surface of the plate cylinder A plate holding roller capable of pressing the printing plate against the plate cylinder when the plate holding roller is capable of being displaced close to the plate cylinder; and a braking means capable of cutting off the link with the plate holding roller. The plate cylinder is wound around the plate cylinder by rotating the plate cylinder while pressing the plate plate, and at least two states of stop and free rotation are selectively performed by the plate pressing roller in association with the operation of the plate cylinder, and the other side of the plate is rotated. The end of the side engaging part is brought into contact with the peripheral surface of the plate cylinder, and the plate cylinder is turned. Plate mounting apparatus characterized by comprising as to match the opening position of the groove of the narrow to the contact position and,

Is provided.

[0022]

The operation of the present invention will be described below with respect to each configuration shown in each claim.

In the configuration according to the first aspect,

1-1. The plate cylinder is stopped at a predetermined rotation phase.

1-2. One of the two parallel sides of the plate is engaged with the plate cylinder by a manual operation of an operator.

1-3. The printing plate insertion start is commanded, and the printing plate holding roller is displaced from the standby position to the printing drum, and the printing plate is pressed against the peripheral surface of the printing drum near one side engaged with the printing drum. .

1-4. The plate cylinder rotates in the forward direction, and the printing plate pressed by the plate pressing roller is wound around the plate cylinder. The plate holding roller is driven and rotated by the driving means to have a peripheral speed substantially equal to or slightly lower than the peripheral speed of the printing plate surface wound around the plate cylinder.

1-5. The plate cylinder rotates by a predetermined angle and stops. At this time, the opening of the narrow groove has reached the vicinity of the pressing position of the plate pressing roller, and the other side of the printing plate is substantially in contact with the plate cylinder at the position pressed by the plate pressing roller. In alignment, the tip of the engaging portion slightly floats from the peripheral surface of the plate cylinder in a state of covering the opening of the groove.

1-6. The plate holding roller stops once or together with the stop of the plate cylinder,
The printing plate held down by the plate holding roller was slightly rotated while holding the printing plate, and the peripheral surface of the plate cylinder was slid by the frictional force with the plate holding roller and pulled back along the contact surface. The end of the engaging portion bent toward the plate cylinder is brought into contact with the press position of the plate press roller from the opening of the narrow groove on the peripheral surface of the plate cylinder. It is pressed against the peripheral surface.

1-7. The driving means stops, and the plate holding roller stops.

1-8. When the plate cylinder rotates in the forward direction, the plate cylinder and the printing plate slide at the position where the plate cylinder is pressed by the plate pressing roller, and the peripheral surface of the plate cylinder is displaced. And the leading end of the engaging portion is inserted into the narrow groove from the opening by the pressing force due to the elasticity of the printing plate.

1-9. After further rotation of the plate cylinder, after the opening of the narrow groove passes under the plate holding roller,
That is, after the engaging portion on the other side of the printing plate is inserted into the narrow groove provided in the plate cylinder, the plate holding roller is displaced far from the plate cylinder at an appropriate timing and returns to the standby position. Alternatively, after the same drive rotation as in the above 1-4 is restarted and rotated with the plate cylinder for an appropriate period, the plate cylinder is displaced away from the plate cylinder and returned to the standby position.

According to the second aspect of the present invention, while the connection between the plate pressing roller and the driving means is maintained in the connected state by the clutch mechanism, the same operation as the first aspect can be performed.
The connection between the plate pressing roller and the driving means is disconnected by a clutch mechanism, and the operation according to claim 1, 1-4, 1-6,
1-9 can be changed to the actions of 2-4, 2-6 and 2-9 described below.

2-4. The plate cylinder rotates in the forward direction, and the printing plate pressed by the plate pressing roller is wound around the plate cylinder. The plate holding roller is disconnected from the driving means by a clutch mechanism and is freely rotatable. The plate holding roller rotates at approximately the same peripheral speed as the peripheral speed of the plate surface wound around the plate cylinder, as the plate surface is displaced. .

2-6. The plate holding roller stops with the stop of the plate cylinder, is connected to the driving means by the clutch mechanism, is driven by the driving means for a short while while holding the printing plate, and the plate holding roller is rotated. The printing plate pressed by the plate holding roller is slid on the peripheral surface of the plate cylinder by the frictional force with the plate pressing roller, pulled back along the contact surface, and the tip of the engaging portion bent toward the plate cylinder side is The plate is pressed against the press drum by the elasticity of the printing plate by being brought into contact with the press position of the press roller from the opening of the narrow groove on the peripheral surface of the plate cylinder.

2-9. After further rotation of the plate cylinder, after the opening of the narrow groove passes under the plate holding roller,
That is, after the engaging portion on the other side of the printing plate is inserted into the narrow groove provided on the plate cylinder, the plate holding roller is displaced with respect to the plate cylinder at an appropriate timing and returned to the standby position. Or
Alternatively, after free rotation similar to that described in 2-4 is resumed and rotated with the plate cylinder for an appropriate period, the sheet is displaced farther from the plate cylinder and returned to the standby position.

According to the third aspect of the present invention,

3-1. The plate cylinder is stopped at a predetermined rotation phase.

3-2. One of the two parallel sides of the plate is engaged with the plate cylinder by a manual operation of an operator.

3-3. The printing plate insertion start is commanded, and the printing plate holding roller is displaced from the standby position to the printing drum, and the printing plate is pressed against the peripheral surface of the printing drum near one side engaged with the printing drum. .

3-4. The plate cylinder rotates in the forward direction, and the printing plate pressed by the plate pressing roller is wound around the plate cylinder. The plate holding roller is lightly braked by the braking means, and rotates with the plate surface at a peripheral speed substantially equal to or slightly lower than the peripheral speed of the plate surface wound around the plate cylinder.

3-5. The plate cylinder rotates and stops by a predetermined angle, however, a predetermined angle slightly larger than in the case of the above-described operation 1-5. At this time, the opening of the narrow groove has reached near the holding position of the plate holding roller,
The other side of the printing plate has its engaging portion covering the opening of the groove, and the leading end abuts against the peripheral surface of the plate cylinder and is slightly pressed against the peripheral surface of the plate cylinder by the elasticity of the plate.

3-6. The braking force of the braking means is increased so that the plate cylinder pressing roller does not rotate with the rotation of the plate cylinder and can maintain a stopped state.

3-7. At the position where the plate cylinder rotates in the opposite direction and is pressed by the plate holding roller, the plate cylinder and the printing plate slide, displacing the peripheral surface of the plate cylinder, and the opening of the narrow groove on the peripheral surface of the plate cylinder is formed. It stops at a position matching the contact position of the tip of the engaging portion. The tip is pressed by the elasticity of the printing plate,
It enters into the narrow groove from the opening.

3-8. Next, the plate cylinder rotates forward, and after the opening of the narrow groove passes below the plate pressing roller, that is, the engaging portion on the other side of the printing plate has a narrow width provided on the plate cylinder. After being inserted into the groove, the printing press roller is displaced with respect to the printing drum at an appropriate timing and returned to the standby position, or the same braking rotation as in 3-4 is resumed and the printing press roller is appropriately stopped. After being rotated together with the plate cylinder, it is displaced away from the plate cylinder and returned to the standby position.

According to the fourth aspect of the invention, while the connection between the plate pressing roller and the braking means is maintained in a connected state, and the braking force is increased or decreased, the same operation as that of the third aspect can be performed. The connection between the plate-holding roller and the braking means is cut off, and 3-4, 3-6, and 3-8 of the operation of claim 3 are described below. 8 can be changed.

4-4. The plate cylinder rotates in the forward direction, and the printing plate pressed by the plate pressing roller is wound around the plate cylinder. The plate holding roller is disconnected from the braking means so as to be freely rotatable, and rotates at a peripheral speed substantially equal to the peripheral speed of the plate surface wound around the plate cylinder as the plate surface is displaced.

4-6. The connection with the braking means is connected so that the plate holding roller can be kept stopped without rotating with the rotation of the plate cylinder.

4-8. Next, the plate cylinder rotates forward, and after the opening of the narrow groove passes below the plate pressing roller, that is, the engaging portion on the other side of the printing plate has a narrow width provided on the plate cylinder. After being inserted into the groove, the plate holding roller is displaced with respect to the plate cylinder at an appropriate timing and returned to the standby position, or the free rotation similar to the above-described 4-4 is resumed and the plate cylinder is appropriately moved for a while. After being rotated together with the plate cylinder, it is displaced away from the plate cylinder and returned to the standby position.

[0050]

Embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 to 4 are a side sectional view, a side view, and an enlarged sectional view showing a narrow groove provided in a plate cylinder, showing a schematic structure of an embodiment of the present invention.

The rotary printing press is equipped with a plate cylinder PC 2 each.
The two blanket cylinders BC are arranged so as to be able to contact and separate from each other and are arranged side by side in the vertical direction in FIG. 1, and are rotationally driven by driving means (not shown), and the plate cylinder PC can be stopped at a predetermined rotation phase. In addition, each set of plate cylinders PC and blanket cylinders BC are provided so as to be able to approach and separate from each other, while each plate cylinder PC is at least provided for supplying ink to the printing plate PP mounted on its peripheral surface. An inking device (only the inking roller IN is shown in FIG. 1) is provided.

Each plate cylinder PC has a narrow width, for example, 5 mm in thickness of the printing plate PP, which is parallel to the axis of the plate cylinder and opens on the peripheral surface.
A groove PG having a width of about double is provided at an appropriate angle and an appropriate depth with respect to the radial direction of the plate cylinder.

In the rotary printing press described above, the printing plate mounting device is configured as follows.

For convenience, FIG. 1 shows an embodiment of a plate mounting device having different configurations for the upper and lower plate cylinders PC.

First, the configuration of an embodiment of the plate mounting device provided for the plate cylinder PC in the upper part of FIG. 1 will be described with reference to FIGS.

In the figure, reference numeral 11 denotes a plate pressing roller. The plate holding roller 11 is rotatably supported on one end of a bell crank arm 13 that is rotatable around a fixed shaft 12 in parallel with the axis of the plate cylinder PC, and one shaft end is A gear 26 is attached while penetrating the bell crank arm 13.
The idle gear 25 is assembled with the sprocket wheel 22 and is rotatably attached to the fixed shaft 12 so as to mesh therewith.

The other end of the bell crank arm 13 is connected to a telescopic rod of a hydraulic cylinder 16 via a pin 14 and a connecting member 15 so as to be rotatable about the axis of the pin 14. The cylinder 16 is rotatably attached to the frame F via a bracket 17.

The bell crank arm 13 supporting the other shaft end of the plate holding roller 11 has a bracket 1
A detection means 18 for detecting an engagement portion PP2 (described later) formed on the other side of the printing plate PP is provided via the plate 9.

On the other hand, a drive means 20 with a speed reduction mechanism is provided on a side surface of the frame F via a bracket 27, and an output shaft of the drive means 20 with a speed reduction mechanism is connected to a clutch mechanism 28.
Is connected to the sprocket wheel 21 via a link.

An endless chain 23 is hung between the sprocket wheel 21 and the sprocket wheel 22. 24 is a chain tension member.

Next, the configuration of an embodiment of a plate mounting device provided for the plate cylinder PC below FIG. 1 will be described with reference to FIGS.

In the drawing, reference numeral 51 denotes a plate pressing roller. The plate holding roller 51 is supported rotatably at one end of a bell crank arm 53 that is rotatable around a fixed shaft 52 in parallel with the axis of the plate cylinder PC, and has one shaft end. , A bell crank arm 53, and a gear 54 is attached.
It is in mesh with an idle gear 55 attached to the fixed shaft 52 via a braking means 56 capable of disconnecting the connection.
That is, the plate holding roller 51 is set to one of a free rotation state, a braking rotation state, and a state in which rotation is not allowed at all (stop state) by adjusting the breaking operation and the braking force of the braking means 56. Can be.

The other end of the bell crank arm 53 is connected to a telescopic rod of a hydraulic cylinder 59 via a pin 57 and a connecting member 58 so as to be rotatable around the axis of the pin 57. The cylinder 59 is rotatably attached to the frame F via a bracket 60.

Although not shown in FIG. 3, the structure of the plate holding roller 51 on the other shaft end side is the same as that shown in FIG.
The bell crank arm supporting the other shaft end of the plate pressing roller 51 has a detecting means 61 for detecting an engaging portion on the other side of the printing plate via a bracket (see FIG. 12).

The operation of the above configuration will be described with reference to FIGS.

In this embodiment, as shown in FIG. 13, each of the two parallel sides is bent to the back side by a predetermined length, and an acute angle bent portion PP1 is formed on one side and an obtuse angle is formed on the other side. Plate PP on which bent portion (engaging portion) PP2 is formed
Use

The operation of mounting the printing plate by the structure shown in FIGS. 1 and 2 is as follows.

1. First, the plate cylinder PC is actuated to stop at a constant phase, stopped at a predetermined rotation phase, and the sharp bend portion PP1 of the printing plate PP is manually inserted into the narrow groove PG of the plate cylinder PC. When inserted, one side of the plate PP engages the plate cylinder PC.

The rising due to the elasticity of the printing plate PP is suppressed by guide rollers 82 appropriately disposed on a shaft 81 provided between the frames F, F. (See Fig. 5)

2. Next, a switch operation of a printing plate mounting start command is performed.

With this command signal, the hydraulic cylinder 1
6 actuates the telescopic load, the plate holding roller 11 is displaced from the standby position to the plate cylinder PC, and the printing plate PP
Is pressed against the peripheral surface of the plate cylinder PC while the blanket cylinder BC and the inking roller IN are pressed.
Is brought into contact with the peripheral surface of the plate cylinder PC.

Further, the crack mechanism 28 is operated, and the sprocket wheel 21 and the driving means 20 with the speed reduction mechanism are turned off. (See Fig. 6)

3. Subsequently, the plate cylinder PC is rotated forward,
The printing plate PP is wound around the peripheral surface of the plate cylinder PC. The plate holding roller 11 presses the printing plate PP firmly on the peripheral surface of the plate cylinder, and at a peripheral speed substantially equal to the peripheral speed of the plate surface wound around the peripheral surface of the plate cylinder PC by the rotation of the plate cylinder PC, the printing plate PP is pressed. Follows with displacement.

The inking roller IN and the blanket cylinder BC are driven and rotated so as to rotate or align with the rotation of the plate cylinder PC, respectively. (See Fig. 7)

4. The plate cylinder PC is rotated by a predetermined angle and stopped when a predetermined rotation phase is reached. At the same time, the plate holding roller 11 and the inking roller I
N is stopped from rotating, and the blanket cylinder BC is stopped from rotating.

The opening of the narrow groove PG has reached the position near the pressing position of the plate pressing roller 11, and the obtuse angle bent portion (engaging portion) PP2 on the other side of the plate PP is
At the position where the plate is held down by the plate holding roller 11, it is substantially aligned with the contact surface that comes into contact with the plate cylinder PC, and the front end of the engaging portion PP2 slightly extends from the peripheral surface of the plate cylinder PC while covering the opening of the groove PG. Floating. (See Fig. 8)

5. When the plate cylinder PC stops at a predetermined rotation phase, the clutch mechanism 28 is actuated to bring the drive unit with speed reduction mechanism 20 and the sprocket wheel 21 into a connected state, while the blanket cylinder BC is separated from the peripheral surface of the plate cylinder PC. Is done. Next, the drive unit 20 with the speed reduction mechanism is operated, and the plate holding roller 11 is driven through the clutch mechanism 28, the sprocket wheel 21, the endless chain 23, the sprocket wheel 22, the idle gear 25, and the gear 26 in the same manner as the above-described rotation. It is driven and rotated in the direction.

Then, the printing plate PP pressed by the plate pressing roller 11 has its back surface slid on the peripheral surface of the plate cylinder PC by the frictional force with the plate pressing roller 11, and is pulled back along the contact surface. Then, the tip of the obtuse bent portion (engaging portion) PP2 is brought into contact with the press position of the plate press roller 11 from the opening of the groove PG, and is pressed against the peripheral surface of the plate cylinder PC by the elasticity of the plate PP. It is put in the state.

When the detecting means 18 detects that the engaging portion PP2 of the printing plate PP has been retracted to the predetermined position, the driving means 20 with the speed reduction mechanism is stopped by the signal, and the printing plate PP by the plate holding roller 11 is stopped. Pullback ends.

The retraction of the printing plate PP may be terminated without using the detecting means 18, such as by providing a timer (not shown) so that the printing plate PP can be pulled back for a predetermined time. . (See Fig. 9)

6. Plate PP by plate holding roller 11
Is completed, the plate cylinder PC is rotated forward. At this time, the clutch mechanism 28 keeps the sprocket wheel 21 and the drive unit 20 with the speed reduction mechanism in the spliced state, and the plate holding roller 11 is not allowed to rotate with the load of the drive unit 20 with the speed reduction mechanism, and stops. In this state, the peripheral surface of the plate cylinder PC slides and displaces with respect to the back surface of the printing plate PP at the position where the plate pressing roller 11 holds down, and the opening of the groove PG comes into contact with the tip of the engaging portion PP2. The leading end of the engagement portion PP2 enters the groove PG from the opening by the pressing force against the peripheral surface of the plate cylinder PC due to the elasticity of the printing plate PP, and the engagement portion PP2 further rotates according to the rotation of the plate cylinder PC. The whole PP2 is inserted into the groove PG.

The plate holding roller 11 squeezes the plate PC and slightly slides on its surface, so that the opening of the groove PG passes below the holding position. (See Fig. 10)

7. When the plate cylinder PC rotates until the opening of the groove PG passes below the press position of the plate press roller 11, the clutch mechanism 28 is operated, and the drive unit 20 with the speed reduction mechanism and the sprocket wheel 21 are disconnected.
Thus, the plate holding roller 11 rotates with the rotation of the plate cylinder PC.

The plate cylinder PC is rotated substantially one turn as it is, and the printing plate PP is adapted to the peripheral surface of the plate cylinder PC by the pressing action of the plate pressing roller 11 or the like.

Thereafter, the fluid pressure cylinder 16 operates the telescopic rod at an appropriate timing, and the plate holding roller 1 is operated.
1 is displaced far from the plate cylinder PC and returned to the standby position. (See Fig. 11)

With the above, the operation of mounting the printing plate with the configuration shown in FIGS. 1 and 2 is completed.

In the structure shown in FIGS. 1 and 2, when the drive means 20 with the speed reduction mechanism and the sprocket wheel 21 are provided directly (not shown) except for the clutch mechanism 28, the above-mentioned description will be omitted. . And 7. Both rotations of the pressing roller 11 in the operation of (1) are driven by the driving means 20 with the speed reduction mechanism.

Next, the operation of the plate mounting by the configuration shown in FIGS. 1 and 3 will be described. This operation is different from the operation of the plate mounting by the configuration shown in FIGS. ,
The operations of 1 to 3 and 7 are substantially the same. That is,

8. First, the plate cylinder PC is actuated to stop at a constant phase, stopped at a predetermined rotation phase, and the sharp bend portion PP1 of the printing plate PP is manually inserted into the narrow groove PG of the plate cylinder PC. When inserted, one side of the plate PP engages the plate cylinder PC.

The hanging of the plate PP is caused by the frames F, F
It is held down by a guide roller 82 disposed as appropriate on a shaft 81 provided therebetween. (Not shown)

9. Next, a switch operation of a printing plate mounting start command is performed.

The command signal causes the hydraulic cylinder 5
9 activates the telescopic rod, the plate holding roller 51 is displaced close to the plate cylinder PC from the standby position, and the plate PP
Is pressed against the peripheral surface of the plate cylinder PC while the blanket cylinder BC and the inking roller IN
Is brought into contact with the peripheral surface of the plate cylinder PC.

Further, the braking means 56 is turned off, and the idle gear 55 can freely rotate with respect to the fixed shaft 52. (Not shown)

10. Subsequently, the plate cylinder PC is rotated forward, and the printing plate PP is wound around the peripheral surface of the plate cylinder PC. The plate holding roller 51 presses the printing plate PP firmly on the peripheral surface of the plate cylinder PC, and rotates the plate surface at substantially the same peripheral speed as the peripheral speed of the plate surface wound around the plate cylinder PC by rotation of the plate cylinder PC. With the displacement of.

The inking roller IN and the blanket cylinder BC are driven and rotated so as to rotate or align with the rotation of the plate cylinder PC, respectively. (Not shown)

11. The plate cylinder PC is set at a predetermined angle, except for the case of 4. Is rotated by a predetermined angle slightly larger than in the case of the operation described above, and stopped when a predetermined rotation phase is reached.

In this embodiment, the engaging portion PP2 of the printing plate PP
Is detected by the detecting means 61 when a predetermined state described later is reached.
Is detected and the rotation of the plate cylinder PC is stopped by the signal. For example, a rotation encoder (not shown) for detecting the rotation phase of the plate cylinder PC causes the plate cylinder PC to rotate to a predetermined rotation phase. It is free in design, such as stopping at

Simultaneously with the stop of the plate cylinder PC, the plate holding roller 51 and the ink forming roller IN are stopped from rotating, and the blanket cylinder BC is stopped from rotating.

Further, the control means 56 is operated jointly in the maximum braking force state, the idle gear 55 is fixed to the fixed shaft 52, and the plate holding roller 51 rotates through the gear 54 meshing with the idle gear 55. An unacceptable state (stop state) is set.

The opening of the narrow groove PG has reached the vicinity of the pressing position of the plate pressing roller 51, and the obtuse angle bent portion (engaging portion) PP2 on the other side of the plate PP is
The top end of the printing plate PP covers the opening of the groove PG, and the leading end of the printing plate PP contacts the peripheral surface of the plate cylinder PC via a portion near one side of the printing plate PP.
Is slightly pressed against the peripheral surface of the plate cylinder PC.

Subsequently, the plate cylinder PC is rotated in the reverse direction (rotation in the direction of arrow A in FIG. 12). At this time, since the plate holding roller 51 is stopped and cannot be rotated, the peripheral surface of the plate cylinder PC slides and displaces with respect to the back surface of the plate PP at the position where the plate holding roller 51 holds down, and the groove PG is displaced. Reaches the position where the tip of the engaging portion PP2 abuts, and the tip of the engaging portion PP2 is pushed into the groove PG from the opening by the pressing force against the peripheral surface of the plate cylinder PC due to the elasticity of the printing plate PP. Get in.

Next, the plate cylinder PC is rotated forward (rotation in the direction of arrow A in FIG. 12), and the engagement portion P
The whole P2 is inserted into the groove PG. (See Fig. 12)

12. During the forward rotation of the plate cylinder PC, the plate pressing roller 51 squeezes the printing plate PP and slightly slides on the surface thereof, so that the opening of the groove PG passes below the pressing position.

When the plate cylinder PC rotates until the opening of the groove PG passes below the pressing position of the plate pressing roller 51, the braking means 56 is turned off, and the idle gear 55 can freely rotate with respect to the fixed shaft 52. To be. This allows
The plate holding roller 51 rotates with the rotation of the plate cylinder PC.

The plate cylinder PC is rotated substantially one turn as it is, and the printing plate PP is adapted to the peripheral surface of the plate cylinder PC by the pressing action of the plate pressing roller 51 and the like.

Thereafter, the fluid pressure cylinder 59 operates the telescopic rod at an appropriate timing, and the plate holding roller 5
1 is displaced far from the plate cylinder PC and returned to the standby position. (Not shown)

With the above, the operation of mounting the printing plate by the configuration shown in FIGS. 1 and 3 is completed.

In the structure shown in FIGS. 1 and 3, when the braking means 56 is a mechanism which cannot disconnect the link with the plate holding roller 51, the plate holding roller in the operation of 10 and 12 described above is used. Each rotation of the brake 51 causes a braking rotation in a state in which the braking force of the braking means 56 is reduced, and the transition of the plate pressing roller 51 to the stop state and the release thereof in the operations of 11 and 12 are controlled by the braking means 56. This is performed by controlling the power.

The present invention is not limited to the embodiment described above. For example, one side of the printing plate PP may be engaged with the plate cylinder PC by another engaging means. In short,
It includes design modifications that do not depart from the scope of the claims.

[0111]

According to the embodiments of the present invention, an apparatus which can safely perform a work of winding and mounting a printing plate around a plate cylinder while rotating the plate cylinder while an operator is away from the rotating plate cylinder is an extremely simple mechanism. As a result, it is possible to reduce the manufacturing cost and the running cost of maintenance and the like.

Further, since the mechanism can be extremely simplified, operation troubles can be reduced and work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a side view of the embodiment provided for the upper plate cylinder of FIG. 1 according to the embodiment of the present invention;

FIG. 3 is a partially parallel view of an embodiment provided for the lower plate cylinder of FIG. 1 according to the embodiment of the present invention;

FIG. 4 is an enlarged sectional view showing a narrow groove provided in the plate cylinder shown in FIG. 1 according to the embodiment of the present invention;

FIG. 5 is an operation explanatory view of the embodiment of the present invention shown in FIGS. 1 to 3;

FIG. 6 is an operation explanatory view of the embodiment of the present invention shown in FIGS. 1 to 3;

FIG. 7 is an operation explanatory view of the embodiment of the present invention shown in FIGS. 1 to 3;

FIG. 8 is an operation explanatory view of the embodiment of the present invention shown in FIGS. 1 to 3;

FIG. 9 is an operation explanatory view of the embodiment of the present invention shown in FIGS. 1 to 3;

FIG. 10 is an operation explanatory view of the embodiment of the present invention shown in FIGS. 1 to 3;

FIG. 11 is an operation explanatory view of the embodiment of the present invention shown in FIGS. 1 to 3;

FIG. 12 is an operation explanatory view of the embodiment of the present invention shown in FIGS. 1 to 3;

FIG. 13 is a perspective view showing a schematic shape of a printing plate used in the embodiment of the present invention shown in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Plate holding roller 12 Fixed shaft 13 Bell crank arm 14 Pin 15 Connecting member 16 Fluid pressure cylinder 17 Bracket 18 Detecting means 19 Bracket 20 Driving means (Driving means with reduction mechanism) 21 Sprocket wheel 22 Sprocket wheel 23 Endless chain 24 Chain tension member Reference Signs List 25 idle gear 26 gear 27 bracket 28 clutch mechanism 51 plate holding roller 52 fixed shaft 53 bell crank arm 54 gear 55 idle gear 56 braking means 57 pin 58 connecting member 59 fluid pressure cylinder 60 bracket 61 detecting means 81 shaft 82 guide roller PC plate Cylinder BC Bracket cylinder IN Inking roller PG Narrow groove F Frame PP Printing plate PP1 One side of printing plate (a sharp bent portion) PP2 Printing plate Engaging portion formed in a square of side (obtuse bent portion)

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-77401 (JP, A) JP-A-62-169646 (JP, A) JP-A-2-101737 (JP, U) JP-A-5 86533 (JP, U)

Claims (4)

(57) [Claims] The present invention has a narrow groove which can be stopped at a predetermined rotational phase, is parallel to an axis and is open on a peripheral surface.
The other side of the printing plate engaged on one side with the plate cylinder is 90
The plate cylinder on which the printing plate is mounted is inserted by inserting the engaging portion formed by being bent toward the plate cylinder side by an angle smaller than the degree, and the plate cylinder is provided so as to be displaceable in the near and far directions with respect to the peripheral surface of the plate cylinder. Sometimes having a plate pressing roller capable of pressing the printing plate against the plate cylinder, and driving means capable of rotating and stopping the plate pressing roller, and rotating the plate cylinder while pressing the printing plate against the plate cylinder by the plate pressing roller. While the printing plate is wound around the plate cylinder, the plate holding roller selectively performs two modes of driving rotation and stop in association with the operation of the plate cylinder, and the leading end of the engaging portion on the other side of the printing plate. The plate mounting device is provided in such a manner as to abut the peripheral surface of the plate cylinder and to rotate the plate cylinder to align the opening position of the narrow groove with the contact position. And a clutch mechanism capable of connecting and disconnecting the link between the plate holding roller and the driving means. The plate holding roller is selectively operated in three states of driving rotation, stop and free rotation in association with the operation of the plate cylinder. 2. The printing plate mounting device according to claim 1, wherein the printing plate mounting device is configured to perform the printing operation. 3. A groove having a narrow width which can be stopped at a predetermined rotational phase, is parallel to the axis, and is open on the peripheral surface.
The other side of the printing plate engaged on one side with the plate cylinder is 90
A plate cylinder on which a printing plate is mounted by inserting an engagement portion formed by being bent toward the plate cylinder by an angle smaller than the degree, and a near displacement provided so as to be capable of being displaced in a distance from the peripheral surface of the plate cylinder. It has a plate press roller that can press the printing plate against the plate cylinder when it is pressed, and braking means that can brake and rotate the plate press roller, and rotates the plate cylinder while pressing the plate against the plate cylinder with the plate press roller. Then, the printing plate is wound around the plate cylinder, and in association with the operation of the plate cylinder, the plate holding roller is selectively operated in two modes, namely, the braking rotation and the stop, so that the engagement portion on the other side of the printing plate is engaged. A plate mounting device characterized in that the leading end is brought into contact with the peripheral surface of a plate cylinder, and the plate cylinder is rotated to align the opening position of the narrow groove with the contact position. 4. A groove having a narrow width which can be stopped at a predetermined rotation phase, is parallel to the axis, and is open on the peripheral surface.
The other side of the printing plate engaged on one side with the plate cylinder is 90
A plate cylinder on which a printing plate is mounted by inserting an engagement portion formed by being bent toward the plate cylinder by an angle smaller than the degree, and a near displacement provided so as to be capable of being displaced in a distance from the peripheral surface of the plate cylinder. It has a plate press roller that can press the printing plate against the plate cylinder when the printing plate is pressed, and braking means that can cut off the link with the plate press roller. While rotating the printing plate around the plate cylinder, the plate holding roller selectively performs at least two of stop and free rotation in association with the operation of the plate cylinder, thereby engaging the other side of the plate with the engaging portion. A printing plate mounting device, wherein the leading end of the plate is brought into contact with the peripheral surface of the plate cylinder, and the plate cylinder is rotated to align the opening position of the narrow groove with the contact position.