JPH11105254A - Method for mounting and removing blanket of printing equipment, and printing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable easy mounting of a blanket on a blanket cylinder even when there is no sufficient space on the lateral side of the blanket cylinder. SOLUTION: On the occasion when a blanket 501 is mounted on a first blanket cylinder 13 or a second blanket cylinder 14, a winding mechanism 502 in a state of having wound up the blanket 501 is fixed to a pair of side plates 37. A metal fitting for mounting attached to the fore end part of the blanket 501 is retained by a fore end part retaining mechanism. In succession, the first blanket cylinder 13 or the second blanket cylinder 14 is rotated and the blanket 501 in the state of being wound up on a winding shaft 522 is unwound. A metal. fitting for mounting attached to the rear end part of the blanket 501 is removed from the winding shaft 522 and retained by a rear end part retaining mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blanket mounting method for a printing apparatus for mounting a blanket on a blanket cylinder in a printing apparatus, a blanket removing method for a printing apparatus for removing a printing plate from a blanket cylinder, and these methods. It relates to a printing device which is optimal for performing the method.

[0002]

2. Description of the Related Art In order to mount a blanket on a blanket cylinder in a printing apparatus, conventionally, an operator moves the blanket to the side of the blanket cylinder while holding the blanket, and winds the blanket around the outer periphery of the blanket cylinder. With this, both ends of the blanket are held by the holding mechanism of the blanket cylinder.

[0003]

The blanket to be mounted on the blanket cylinder has a relatively large size because it has an area equal to or larger than the image to be printed.
Therefore, in order to mount the blanket on the blanket cylinder by the above-described process, a sufficient space is required on the side of the blanket cylinder.

[0004] For this reason, there arises a problem that the degree of freedom of the design of the printing apparatus is limited or the installation place of the printing apparatus itself is limited.

[0005] In a printing apparatus for performing printing using an image recording and developing process on a printing plate and then performing printing using the printing plate, a plate making apparatus such as an image recording apparatus is installed inside the printing apparatus. The necessity of disposing the mechanism makes it difficult to secure a sufficient space on the side of the blanket cylinder.

Further, in a printing machine of a type in which printing units for respective colors are connected like a general multi-color printing machine, it is relatively easy to provide a space beside a blanket cylinder. In a printing apparatus that performs multicolor printing by contacting a plurality of blanket cylinders with a single impression cylinder, it is difficult to provide a sufficient space beside the blanket cylinder.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a printing apparatus which can easily mount a blanket on a blanket cylinder even when there is not enough space on the side of the blanket cylinder. It is an object of the present invention to provide a blanket mounting method, a blanket removing method for a printing apparatus, and a printing apparatus.

[0008]

The invention according to claim 1 is a blanket mounting method for a printing apparatus for mounting a blanket on an outer peripheral portion of a blanket cylinder in the printing apparatus, wherein the blanket is mounted on a winding shaft. A winding step of winding the blanket in a state substantially parallel to the blanket cylinder by positioning both ends of a winding shaft on which the blanket is wound on a printing apparatus main body, and winding the blanket. Axis fixed stroke,
A leading end holding step of holding a leading end of the blanket wound on the winding shaft by a leading end holding mechanism provided on the blanket cylinder; and rotating the blanket cylinder to wind the blanket on the winding shaft. A blanket unwinding step of unwinding the taken blanket around the outer periphery of the blanket cylinder, and a rear end holding mechanism disposed on the blanket cylinder to hold a rear end of the blanket unwound around the outer periphery of the blanket cylinder. And a rear end holding step of holding.

According to a second aspect of the present invention, there is provided a blanket removing method for a printing apparatus for removing a blanket mounted on an outer peripheral portion of a blanket cylinder of the printing apparatus from the blanket cylinder, wherein the blanket can be wound up. A winding shaft fixing step for fixing the winding shaft in a state substantially parallel to the blanket cylinder by positioning both ends of the wound winding shaft in the printing apparatus main body; and A rear end holding release step of releasing the holding state of the rear end of the blanket by the rear end holding mechanism, and the winding shaft of the rear end of the blanket released from the holding state by the rear end holding mechanism. A rear end insertion step of inserting the holder into the holding groove formed in the blanket cylinder, and rotating the blanket cylinder and the winding shaft so that A blanket winding step of winding a blanket mounted on an outer peripheral portion of the blanket cylinder around the winding shaft, and a rear end for releasing a holding state of a leading end portion of the blanket by a leading end holding mechanism disposed on the blanket cylinder. And a part holding release step.

According to a third aspect of the present invention, there is provided a printing apparatus for printing an image by recording an image on a printing plate, making a plate, and then supplying ink to the printing plate to perform printing. A recording device, a plate cylinder for holding a printing plate on which an image is recorded by the image recording device on the outer periphery, an impression cylinder capable of holding printing paper on the outer periphery, A blanket cylinder mounted with a blanket for transferring ink to the printing paper held on the outer peripheral portion of the impression cylinder from the printing plate, and a winding shaft capable of winding the blanket, A blanket take-up mechanism configured to be able to be fixed in a state substantially parallel to the blanket cylinder on the side of the blanket cylinder by positioning both ends of the blanket cylinder with the printing apparatus body.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of a printing apparatus according to the present invention.

The printing apparatus includes first and second plate cylinders 11,
After recording an image on a printing plate having no image recorded on the plate 12 and making a plate, the ink supplied to the printing plate is applied to the impression cylinder 15 via the first and second blanket cylinders 13 and 14. The printing is performed by transferring the image to the held printing paper.

This printing apparatus includes a first plate cylinder 11 movable between a first printing position shown by a solid line in FIG. 1 and an image recording position shown by a two-dot chain line, and a first printing cylinder 11 shown by a solid line in FIG. And a second plate cylinder 12 movable between the second printing position and the image recording position.

The first plate cylinder 11 moved to the first printing position
Around the printing plate, an ink supply device 20a for supplying black (K) ink to the printing plate, an ink supply device 20b for supplying magenta (M) ink to the printing plate, and a printing plate. The dampening water supply devices 21a and 21b for supplying dampening water are arranged. Further, around the second plate cylinder 12 moved to the second printing position, an ink supply device 20c for supplying, for example, cyan (C) ink to the printing plate, and a yellow (Y) ink to the printing plate, for example.
An ink supply device 20 d for supplying the ink of the present invention, a dampening solution supply device 21 c for supplying a dampening solution to the printing plate,
21d. Further, around the first plate cylinder 11 or the second plate cylinder 12 that has moved to the image recording position, a plate feeding unit 23, a plate discharging unit 24, and an image recording device 25 are provided.
And a developing device 26 are disposed.

The printing apparatus includes a first blanket cylinder 13 provided so as to be in contact with the first plate cylinder 11 and a second blanket cylinder provided so as to be in contact with the second plate cylinder 12. The impression cylinder 1 provided so as to be able to contact the cylinder 14 and the first and second blanket cylinders 13 and 14 at different positions.
5, a paper feed cylinder 16 for passing the print paper supplied from the paper feed unit 27 to the impression cylinder 15, and a chain 1 for discharging the printed print paper received from the impression cylinder 15 to the paper discharge unit 28.
9 and a blanket cleaning device 29
And

The first and second plate cylinders 11 and 12 are connected to a not-shown plate cylinder moving mechanism, respectively, and driven by the plate cylinder moving mechanism to move the first or second printing position to the above-described first or second printing position. It reciprocates between the image recording position. The first plate cylinder 11 is driven by a motor (not shown) to
The second printing cylinder 12 is configured to rotate synchronously with the second blanket cylinder 14 at the second printing position at the second printing position. Further, a plate cylinder rotating mechanism (not shown) is provided near the image recording position, and the first and second plate cylinders 1 are arranged.
Each of the printing drums 1 and 12 is configured to be rotated by driving the plate cylinder rotating mechanism when the printing drum is moved to the image recording position.

Around the first plate cylinder 11 or the second plate cylinder 12 moved to the image recording position, a plate feeding section 23 and a plate discharging section 2 are provided.
4 are arranged.

The plate supply unit 23 includes a supply cassette 63 for storing a long roll-shaped printing plate on which no image is recorded in a light-tight state, and a leading end of the printing plate pulled out from the supply cassette 63. A guide member 64 and a guide roller 65 for guiding the surface of the first plate cylinder 11 or the second plate cylinder 12 and a cutter 66 for cutting a long printing plate into a sheet-shaped printing plate are provided. It is arranged. The first and second plate cylinders 11 and 12 are provided with a pair of holding claws (not shown) for holding the leading and trailing ends of the printing plate supplied from the plate supply unit 23. .

After the printing is completed, the plate discharging section 24 moves the first plate cylinder 1
A claw mechanism 73 for peeling the printing plate held on the first or second plate cylinder 12; a conveyor mechanism 69 for transporting the printing plate peeled off by the action of the claw mechanism 73 to the discharge cassette 68; It has a cassette 68.

The leading end of the printing plate pulled out of the supply cassette 63 in the plate supplying section 23 is guided by a guide roller 65 and a guide member 64, and one of the first plate cylinder 11 and the second plate cylinder 12 is held. It is added to the nail. Then, the first plate cylinder 11 or the second plate cylinder 12 is rotated by the drive of the plate cylinder rotating mechanism 30, and the printing plate is moved to the first plate cylinder 11.
Alternatively, it is wound around the outer peripheral portion of the second plate cylinder 12. Then, the rear end of the printing plate cut by the cutter 66 is held by the other holding claw. In this state, while the first plate cylinder 11 or the second plate cylinder 12 is rotated at a low speed, the printing held by the image recording device 25 on the outer peripheral portion of the first plate cylinder 11 or the second plate cylinder 12 is performed. The surface of the plate is irradiated with a modulated laser beam and an image is recorded.

The printing plate P mounted on the outer periphery of the first plate cylinder 11 is image-recorded by the image recording device 25 in FIG.
As shown in FIG. 7, an image area 67a for printing with black ink and an image area 67b for printing with magenta ink are recorded. Also, the second plate cylinder 12
The printing plate P mounted on the outer peripheral portion of the
Thus, as shown in FIG. 2B, an image area 67c for printing with cyan ink and an image area 67d for printing with yellow ink are recorded. The image area 67a and the image area 67b are recorded at positions that are equally distributed (that is, 180 degrees apart from each other) when mounted on the outer peripheral portion of the first plate cylinder 11. Similarly, the image area 67c and the image area 6
7d refers to a state in which the second plate cylinder 12 is mounted on the outer periphery of the second plate cylinder 12 and is uniformly distributed (that is, 1
80 degrees apart).

Referring again to FIG. 1, as described above, the ink supply devices 20a and 20b are provided around the first plate cylinder 11 moved to the first printing position. An ink supply device 20c and an ink supply device 20d are arranged around the second plate cylinder 12 moved to the second printing position. These ink supply devices 20a, 20
Each of b, 20c, and 20d (hereinafter, collectively referred to as “ink supply device 20”) has a plurality of ink rollers 71 and ink fountains 72.

The ink rollers 71 of the ink supply devices 20a and 20b perform a swing operation by the action of a cam or the like (not shown). Then, by this swinging operation, the two image areas 6 formed on the printing plate P held on the outer peripheral portion of the first plate cylinder 11 are formed.
When an ink roller 71 of the ink supply device 20a or 20b comes into contact with an arbitrary image area of 7a and 67b, ink can be supplied only to a necessary image area. Similarly, the ink supply device 20
The ink rollers 71 of c and 20d also swing by the action of a cam or the like (not shown). And, by this swinging operation,
The ink roller 71 of the ink supply device 20c or 20d comes into contact with an arbitrary image region of the two image regions 67c and 67d formed on the printing plate P held on the outer peripheral portion of the second plate cylinder 12. With this configuration, ink can be supplied only to a necessary image area.

The fountain solution supply devices 21a, 21b, 21c and 21d (when these are collectively referred to as "fountain solution supply device 21") are used before the ink supply device 20 supplies ink to the printing plate P. Then, a dampening solution is supplied to the printing plate P. Of these dampening water devices 21, the dampening water supply device 21a is an image area 67a in the printing plate P.
The dampening solution supply device 21b is in the image region 67b of the printing plate P, the dampening solution supply device 21c is in the image region 67c of the printing plate P, and the dampening solution supply device 21d is in the image region 67d of the printing plate P. Are supplied with fountain solution.

Below the first plate cylinder 11 or the second plate cylinder 12 moved to the image recording position, a developing device 26 is provided. The developing device 26 has a developing unit, a fixing unit, and a diaphragm unit, and is configured to be able to move up and down between a standby position indicated by a two-dot chain line and a developing position indicated by a solid line in FIG.

When the printing plate P on which the image is recorded by the image recording device 25 is developed by the developing device 26, the printing plate P rotating together with the first plate cylinder 11 or the second plate cylinder is processed. Then, the developing unit, the fixing unit, and the diaphragm unit are sequentially brought into contact.

The first and second blanket cylinders 13 and 14, which are provided so as to be able to contact the first and second plate cylinders 11 and 12,
It has the same diameter as the first and second plate cylinders 11 and 12, and a blanket for ink transfer is mounted on the outer periphery thereof. Then, the first and second blanket cylinders 13, 1
Reference numeral 4 denotes a configuration in which the first and second plate cylinders 11 and 12 and the impression cylinder 15 can be freely contacted and separated by a cylinder insertion mechanism (not shown).

The first and second blanket cylinders 13,
14, a blanket mounting device for mounting a blanket 501, and first and second blanket cylinders 13, 1
The configuration of the blanket 501 winding mechanism 502 and the like for easily mounting the blanket 501 on the device 4 will be described later in detail.

A blanket cleaning device 29 disposed between the first and second blanket cylinders 13 and 14 is a lengthwise affixed to a path from an unwinding roll to a winding roll via a plurality of pressure rollers. Supply the cleaning liquid to the cleaning cloth of the length,
The cleaning cloth is brought into contact with the first and second blanket cylinders 13 and 14 and then slid to clean the surfaces of the first and second blanket cylinders 13 and 14.

The impression cylinder 15 provided so as to be able to contact the first and second blanket cylinders 13 and 14 is provided with the first and second plate cylinders 1.
1, 12 and first and second blanket cylinders 13, 14
直径 of the diameter of Further, the impression cylinder 15 has a gripper (not shown) for holding and transporting the leading end of the printing paper.

The paper feed cylinder 16 disposed adjacent to the impression cylinder 15 has the same diameter as the impression cylinder 15. The paper feeding cylinder 16 holds and transports the leading end of the printing paper supplied one by one from the paper feeding unit 27 by a gripper (not shown) by a suction board 74 that reciprocates. The leading end of the printing paper held by the gripper is held by the gripper of the impression cylinder 15 when the printing paper is transferred from the paper feed cylinder 16 to the impression cylinder 15.

The paper discharge cylinder 17 disposed adjacent to the impression cylinder 15 has the same diameter as the impression cylinder 15. The paper discharge cylinder 17 has a structure in which a pair of chains 19 is wound around both ends, and grippers are provided on connecting members (not shown) that connect the pair of chains 19. The leading end of the printing paper held by the gripper of the impression cylinder 15 is
When the printing paper is transferred from the impression cylinder 15 to the discharge cylinder 17,
It is held by one of the grippers of the paper discharge cylinder 17. Then, the printing paper is conveyed onto the paper discharge unit 28 as the chain 19 moves and is discharged.

The paper feed cylinder 16 is connected to a drive motor via a belt (not shown). And the paper feed cylinder 1
6, the impression cylinder 15, the paper discharge cylinder 17, and the first and second blanket cylinders 13 and 14 are respectively connected by gears attached to their ends. Further, the first blanket cylinder 13 and the first plate cylinder 11 moved to the first printing position, and the second blanket cylinder 14 and the second plate cylinder 12 moved to the second printing position, They are connected by gears attached to their ends. Accordingly, these paper feed cylinder 16, impression cylinder 15, and discharge cylinder 1 are driven by a drive motor (not shown).
7. The first and second blanket cylinders 13, 14 and the first and second plate cylinders 11, 12 rotate in synchronization with each other.

FIG. 3 is a block diagram showing a main electrical configuration of the printing apparatus. The printing apparatus includes a ROM 141 storing operation programs necessary for controlling the apparatus,
RAM 142 for temporarily storing data and the like during control
And a control unit 140 including a CPU 143 for executing a logical operation. The control unit 140 controls the ink supply device 20, the image recording device 25, the development processing device 26, the blanket cleaning device 29,
A drive circuit 14 for generating a drive signal for a drive unit or the like in a mechanism for inserting the first and second blanket cylinders 13 and 14 and the like.
5 is connected. The printing apparatus is controlled by the control unit 140, and executes a plate making operation and a printing operation described later.

Next, plate making and printing operations by the printing apparatus will be described. FIG. 4 is a flowchart showing an outline of a plate making and printing operation by the printing apparatus.
Note that the printing and plate making operations are performed when multicolor printing is performed on printing paper with four color inks of yellow, magenta, cyan, and black.

First, a plate making process for recording an image on the printing plate P on the first and second plate cylinders 11 and 12 and performing a developing process is executed (step S1). This plate making process is executed according to the process shown in the flowchart of FIG. 5 as a subroutine.

That is, first, the first plate cylinder 11 is
Is moved to the image recording position indicated by the two-dot chain line (step S11).

Next, the printing plate P is supplied to the outer periphery of the first plate cylinder 11 (step S12). The supply of this printing plate P is
This operation is performed by holding the leading end of the printing plate P pulled out from the supply cassette 63 and the rear end of the printing plate P cut by the cutter 66 with a pair of holding claws (not shown).

Subsequently, an image is recorded on the printing plate P held on the outer periphery of the first plate cylinder 11 (step S13). The image is recorded by rotating the first plate cylinder 11 at a low speed and irradiating the modulated printing laser beam to the printing plate P held on the outer periphery of the first plate cylinder 11 from the image recording device 25. Be executed.

Next, the printing plate P on which the image has been recorded is developed (step S14). In this developing process, after the developing device 26 is raised from the standby position indicated by the two-dot chain line to the developing position indicated by the solid line in FIG.
This is performed by sequentially bringing the developing unit, the fixing unit, and the diaphragm unit into contact with the printing plate P that rotates together with the printing plate P.

When the developing process is completed, the first plate cylinder 1
1 is moved to a first printing position indicated by a solid line in FIG. 1 (step S15).

Subsequently, a plate making process for the printing plate P held on the outer periphery of the second plate cylinder 12 is executed by the same operation as in steps S11 to S15 (steps S16 to S2).
0). Then, when the plate making on the printing plate P held on the outer periphery of the first and second plate cylinders 11 and 12 is completed, the plate making process is completed.

Referring again to FIG. 4, when the plate making process is completed, a printing process for printing on printing paper using the printing plate P on the first and second plate cylinders 11 and 12 is executed (step). S
2). This printing process is performed as follows.

That is, first, each fountain solution supply device 21 and each ink supply device 20 are connected to the first and second plate cylinders 11 and 1, respectively.
2 is brought into contact only with the corresponding image area of the printing plate P held on the top. Thereby, each image area 67a, 67
b, 67c and 67d correspond to the respective dampening water supply devices 21.
Further, dampening water and ink are supplied from each ink supply device 20. Then, the ink supplied to the printing plate P is transferred to corresponding areas of the first and second blanket cylinders 13 and 14.

Then, the printing paper is supplied to the paper feed cylinder 16. The printing paper is transferred from the paper feed cylinder 16 to the impression cylinder 15. In this state, when the impression cylinder 15 continues to rotate, the impression cylinder 15
Has half the diameter of the first and second plate cylinders 11 and 12 and the first and second blanket cylinders 13 and 14, so that the printing paper held on the outer periphery of the impression cylinder 15 , In the first rotation, black and cyan inks,
In the second rotation, magenta and yellow inks are transferred.

In this way, the leading end of the printing paper after the printing of the four colors is passed from the impression cylinder 15 to the discharge cylinder 17. The printing paper on which the printing of the four colors has been completed is conveyed to the discharge unit 28 together with the gripper of the discharge cylinder 17 by the driving of the pair of chains 19 and discharged.

When the printing process is completed, the printing plate P used for printing is discharged (step S3). In order to discharge the printing plate P, first, the first plate cylinder 11 is moved to an image recording position indicated by a two-dot chain line in FIG. Then, the first plate cylinder 11 is rotated counterclockwise, and the end of the printing plate P held on the first plate cylinder 11 is peeled off by the claw mechanism 73. It is guided by 69 and discharged into the discharge cassette 68. Then, after returning the first plate cylinder 11 to the first printing position, the second plate cylinder 12 is moved from the second printing position to the image recording position, and by performing the same operation as described above, The printing plate P held on the second plate cylinder 12 is discharged into the discharge cassette 68.

When the step of discharging the printing plate P is completed, the first and second blanket cylinders 13 and 14 are cleaned by the blanket cylinder cleaning device 29 (step S4).

When the cleaning of the first and second blanket cylinders 13 and 14 is completed, it is confirmed whether or not to print another printed material (step S5). To perform another printing operation, the operations of steps 1 to 4 are repeated.

When the printing operation is completed, the ink is washed (step S6). The cleaning of the ink is performed by removing and cleaning the ink adhered to the ink roller 71 and the ink fountain 72 in each ink supply device 20 by an ink cleaning device (not shown) provided in each ink supply device 20. .

When the ink washing step is completed, all the steps are completed.

Next, the configuration of the blanket mounting device will be described. FIG. 6 is a schematic side view of the first blanket cylinder 13 near the trunk opening 505, and FIG. 7 is a plan view thereof. In the following description, the configuration of the blanket mounting device in the first blanket cylinder 13 will be described. However, the blanket mounting device having the same configuration is also used for the second blanket cylinder 14.

This blanket mounting device has a front end holding mechanism 506 and a rear end holding mechanism 507 disposed in the opening section 505 of the first blanket cylinder 13. The tip holding mechanism 506 is used for the blanket 50.
The mounting bracket 503 is provided for fixing the mounting bracket 503 by inserting the mounting bracket 503 attached to the front end of the blanket 501. This is for pulling the blanket 501 in a direction in which the blanket 501 is tensioned while being engaged with the fitting 504.

In this specification, for convenience of explanation, one end of the blanket 501 is referred to as a leading end, and the other end of the blanket 501 is referred to as a rear end.

The tip end holding mechanism 506 includes a trunk opening 5
The mounting bracket 503 is pressed toward the step 509 by rotating around a step 509 formed of a concave portion formed in the side wall 508 in FIG. 05 and a shaft 510 extending in the axial direction of the first blanket cylinder 13. Eccentric cam 511 movable between a pressing position to be pressed and a retreat position retracted from the pressing position, a coil spring 512 for urging the eccentric cam 511 toward the pressing position, and an eccentric cam 511 standing upright. And a contact member 514 that regulates the rotational position of the eccentric cam 511 by the action of the coil spring 512 when the lever 513 comes into contact with the lever 513.

The operation of fixing the mounting bracket 503 by inserting the mounting bracket 503 attached to the front end of the blanket 501 into the front end holding mechanism 506 is as follows.
It is executed as follows.

That is, as shown by the arrow in FIG. 6, the mounting bracket 503 attached to the tip of the blanket 501 is connected to the eccentric cam 511 and the side wall 5 of the trunk opening 505.
08. As a result, as shown in FIG. 8, the eccentric cam 511 rotates about the shaft 510, and the eccentric cam 511 and the side wall 50 of the trunk opening 505 are rotated.
8 becomes larger.

In this state, as shown by the arrow in FIG. 8, the mounting bracket 503 attached to the front end of the blanket 501 is further inserted into the gap between the eccentric cam 511 and the side wall 508 of the trunk opening 505. Let me enter. Thus, when the end of the mounting bracket 503 attached to the leading end of the blanket 501 on the side of the blanket 501 passes through the end 515 of the step portion 509, the mounting bracket 503 is pressed by the eccentric cam 511 and the step portion 509 is pressed. As shown in FIG. 9, the end of the mounting bracket 503 on the side of the blanket 501 engages with the end 515 of the step portion 509, and the mounting bracket 503 is moved together with the blanket 501 in the trunk opening 505 as shown in FIG. 9. Fix it.

Therefore, according to the tip holding mechanism 506, the tip of the blanket 501 can be fixed only by inserting the mounting bracket 503 attached to the tip of the blanket 501.

In order to release the fixed state of the mounting bracket 503, the lever 51 erected on the eccentric cam 511 is opened.
3 is moved upward from the state shown in FIG. Accordingly, the eccentric cam 511 rotates counterclockwise about the shaft 510. Then, with the rotation of the eccentric cam 511,
The distance between the eccentric cam 511 and the side wall 508 of the trunk opening 505 is increased, and the mounting bracket 503 attached to the tip of the blanket 501 is moved to the eccentric cam 511 and the trunk opening 505.
5 can be removed by passing through the gap between the side wall 508 and the side wall 508.

Referring again to FIG. 6 and FIG. 7, the rear end holding mechanism 507 is disposed in the body opening 505 in the axial direction of the first blanket cylinder 13, and the rear end of the blanket 501 is provided. Mounting bracket 504 attached to
A mounting shaft 517 having a groove 516 for inserting the
It has a worm wheel 518 provided at the end of the mounting shaft 517, and a worm gear 519 connected to the worm wheel 518.

The operation of pulling the blanket 501 by the rear end holding mechanism 507 in the direction in which the blanket 501 is tensioned is performed as follows.

That is, as shown by an arrow in FIG. 9, the mounting bracket 504 attached to the rear end of the blanket 501 whose front end is already held by the front end holding mechanism 506 is inserted into the groove 516 of the mounting shaft 517. Insert inside. In this state, the worm gear 51
By rotating the worm gear 519 through a nut 521 disposed at the end of the worm wheel 51,
The attachment shaft 517 is rotated in the direction of the arrow shown in FIG. Thus, the mounting bracket 504 attached to the rear end of the blanket 501 is fixed in the groove 516, and the blanket 501 is pulled in a direction in which tension is applied.

The fixing and towing state of the mounting bracket 504 can be released by rotating the worm gear 519 in the opposite direction via the nut 521.

Next, the first and second blanket cylinders 13,
The configuration of the winding mechanism 502 of the blanket 501 according to the present invention for easily mounting the blanket 501 on the device 14 will be described.

FIG. 11 is a side view of the winding mechanism 502, and FIG. 12 is a partial sectional view of the winding mechanism 502.
FIG. 13 is a schematic diagram showing a state in which the winding mechanism 502 is fixed to a pair of side plates 37 in the printing apparatus main body. FIG.
FIG. 4 is a schematic diagram showing a state where a blanket 501 is wound around 22.

As shown in FIGS. 11 and 12, the winding mechanism 502 has a holding groove 52 for holding a mounting bracket 504 attached to the rear end of the blanket 501.
The winding shaft 522 on which the winding shaft 3 is formed, and the winding shaft 5
22, a handle 525 connected to the other end of the take-up shaft 522 via a shaft 528, and a shaft 528 rotated at a position between the take-up shaft 522 and the handle 525. And a positioning plate 526 for supporting the positioning.

The positioning plate 526 is provided with a screw 529 for pressing the brake shoe 527 against the shaft 528. Therefore, a predetermined braking force is applied to the shaft 528 by the brake shoe 527.

On the other hand, as shown in FIG. 13, one of the pair of side plates 37 in the printing apparatus main body is provided with a winding mechanism 50.
Positioning block 532 having hole 531 for positioning by inserting second positioning pin 524
Are arranged. Further, the other side plate 37 of the printing apparatus main body is provided with a positioning plate 526 of the winding mechanism 502.
A positioning block 535 having a positioning pin 534 that engages with a hole 533 (see FIG. 11) formed in the hole is provided. The positioning plate 5 of the winding mechanism 502
26, a pair of holes 5 for screwing the positioning plate 526 to the positioning block 535 as necessary.
36 are formed.

When the winding mechanism 502 is fixed to the printing apparatus main body, the positioning pin 524 of the winding mechanism 502 is inserted into the hole 531 of the positioning block 532 and the positioning pin 5 of the positioning block 535 is inserted.
34 is inserted into the hole 533 of the positioning plate 526. As a result, the winding mechanism 502 has its winding shaft 522
Is substantially parallel to the first blanket cylinder 13 or the second blanket cylinder 14, and is fixed between the pair of side plates 37 in the printing apparatus main body.

Next, the blanket 5 is attached to the first blanket cylinder 13 or the second blanket cylinder 14 using the above-described winding mechanism 502 and blanket mounting device.
The mounting operation for mounting 01 will be described. FIGS. 15 to 18 are explanatory diagrams showing the mounting process of the blanket 501.

In mounting the blanket 501 on the first blanket cylinder 13 or the second blanket cylinder 14, as shown in FIG. 14, the blanket 501 is wound on a winding shaft 522 of a winding mechanism 502 in advance. . The winding of this blanket 501
An operator inserts the mounting bracket 504 attached to the rear end of the blanket 501 into the holding groove 523 formed in the winding shaft 522 and rotates the winding shaft 522 to execute the operation.

Then, as shown in FIG. 13, the winding mechanism 502 with the blanket 501 wound thereon is fixed to the pair of side plates 37 in the printing apparatus main body. As described above, the positioning pin 524 of the winding mechanism 502 is fixed to the positioning block 5 by fixing the winding mechanism 502.
This is performed by inserting the positioning pin 534 of the positioning block 535 into the hole 533 of the positioning plate 526 while inserting the positioning pin 534 into the positioning block 535.

In the fixing process of the winding mechanism 502 described above, the blanket 501 is
It is in a state of being wound in advance on the second winding shaft 522. For this reason, this blanket 501 is taken together with the winding mechanism 502 together with the first blanket cylinder 13 or the second blanket cylinder 13.
The blanking cylinder 14 is inserted into the inside of the printing apparatus main body from the side surface side, and the winding shaft 522 is connected to the first blanket cylinder 1.
The third or second blanket cylinder 14 can be fixed to the printing apparatus main body in a substantially parallel state. Therefore, even when there is not enough space near the first blanket cylinder 13 or the second blanket cylinder 14, the blanket cylinder 501 can enter the inside of the printing apparatus main body.

In this state, as shown in FIG. 15, the winding mechanism 502 in a state in which the blanket 501 has been wound, holds the leading end portion provided on the first blanket cylinder 13 or the second blanket cylinder 14. It is located above the mechanism 506.

Next, as shown in FIG. 16, the mounting bracket 503 attached to the front end of the blanket 501 is held by the front end holding mechanism 506. This mounting bracket 50
As described above, the mounting bracket 503 is connected to the eccentric cam 511 and the torso opening 5 in the distal end holding mechanism 506 as described above.
This is performed by inserting it into the gap between the side wall 508 and the side wall 508.

In this state, the first blanket cylinder 13 or the second blanket cylinder 14 is rotated by driving a motor (not shown). Thereby, as shown in FIG. 17, the blanket 501 wound around the winding shaft 522 of the winding mechanism 502 is unwound around the outer periphery of the first blanket cylinder 13 or the second blanket cylinder 14.

In this state, the winding mechanism 502
The winding shaft 522 in the first blanket cylinder 1
It rotates in synchronization with the rotation of the third or second blanket cylinder 14. At this time, with respect to the rotation of the winding shaft 522,
The braking force is exerted by the action of the brake shoe 527 and the screw 529 described above. Therefore, the blanket 501 can be unwound accurately around the outer peripheral portion of the first blanket cylinder 13 or the second blanket cylinder 14 without meandering.

In this state, the first blanket cylinder 1
The third or second blanket cylinder 14 continues to rotate, and as shown in FIG. 18, the winding mechanism 502 has a rear end holding mechanism 507 provided on the first blanket cylinder 13 or the second blanket cylinder 14. Is stopped, the rotation of the first blanket cylinder 13 or the second blanket cylinder 14 is stopped.

Subsequently, the mounting bracket 504 attached to the rear end of the blanket 501 is removed from the holding groove 523 formed in the winding shaft 522 of the winding mechanism 502. Then, the mounting bracket 504 is held by the rear end holding mechanism 507 provided on the first blanket cylinder 13 or the second blanket cylinder 14. The holding of the mounting bracket 504 is performed as described above.
4 is inserted into the groove 516 of the attachment shaft 517 in the rear end holding mechanism 507, and then the attachment shaft 517 is rotated to apply tension to the blanket 501.

By completing the above steps, the blanket 501 is mounted on the outer peripheral portion of the first blanket cylinder 13 or the second blanket cylinder 14 in a state where tension is applied. When the attachment of the blanket 501 to the first blanket cylinder 13 or the second blanket cylinder 14 is completed, the winding mechanism 502 is removed from the printing apparatus main body.

Next, an operation of removing the blanket 501 from the first blanket cylinder 13 or the second blanket cylinder 14 using the above-described winding mechanism 502 and the blanket mounting device will be described.

First, as shown in FIG. 18, the winding mechanism 502 fixed to the side plate 37 of the printing apparatus main body is used by the first blanket cylinder 13 or the second blanket cylinder 1.
4, the mounting bracket 504 attached to the rear end of the blanket 501 is removed from the rear end holding mechanism 507 while being located above the rear end holding mechanism 507 disposed in the fourth bracket 4. The mounting bracket 504 can be removed by removing the nut 521.
Is operated to rotate the mounting shaft 517. Then, the mounting bracket 504 is inserted into the holding groove 5 formed on the winding shaft 522 of the winding mechanism 502.
23.

Next, the first blanket cylinder 13 or the second blanket cylinder 1 is driven by a motor (not shown).
4 is rotated in a direction opposite to the direction in which the blanket 501 is mounted, and the operator rotates the winding mechanism 502.
By operating the handle 525 of the winding shaft 5
22 is rotated. As a result, the blanket 501 mounted on the outer peripheral portion of the first blanket cylinder 13 or the second blanket cylinder 14 is wound by the winding shaft 522 of the winding mechanism 502.

In this state, the first blanket cylinder 1
The third or second blanket cylinder 14 continues to rotate, FIG.
As shown in FIG. 6, the winding mechanism 502 in a state where the blanket 501 has been wound is located above the leading end holding mechanism 506 provided on the first blanket cylinder 13 or the second blanket cylinder 14. For example, the rotation of the first blanket cylinder 13 or the second blanket cylinder 14 is stopped.

The leading end holding mechanism 50 of the first blanket cylinder 13 or the second blanket cylinder 14
Then, the mounting bracket 503 attached to the tip of the blanket 501 is removed from 6. When the mounting bracket 503 is removed, the lever 513 erected on the eccentric cam 511 is moved in FIG.
It is executed by moving it upward from the state shown in FIG.

By completing the above steps, the blanket 501 mounted on the outer periphery of the first blanket cylinder 13 or the second blanket cylinder 14 is removed from the first blanket cylinder 13 or the second blanket cylinder 14. Then, it is wound around the winding shaft 522 of the winding mechanism 502. When the removal of the blanket 501 from the first blanket cylinder 13 or the second blanket cylinder 14 is completed, the winding mechanism 502 is switched to the blanket 501.
Together with the printer.

At this time, since the blanket 501 has already been wound on the winding shaft 522 of the winding mechanism 502, a sufficient space is provided near the first blanket cylinder 13 or the second blanket cylinder 14. Even if there is no blanket, by moving the winding mechanism in a direction parallel to the first blanket cylinder 13 or the second blanket cylinder 14, the blanket cylinder 5 can be moved.
01 can be easily taken out of the printing apparatus main body.

[0089]

According to the first aspect of the present invention, the blanket is mounted on the outer periphery of the blanket cylinder by unwinding the blanket onto the blanket cylinder from the winding shaft on which the blanket has been previously wound. Even if there is not enough space on the side of the torso,
The blanket can be easily attached to the blanket cylinder.

According to the second aspect of the present invention, the blanket mounted on the outer peripheral portion of the blanket cylinder is wound around the winding shaft and removed from the blanket cylinder.
Even when there is not enough space on the side of the blanket cylinder, the blanket can be easily removed from the blanket cylinder.

According to the third aspect of the present invention, after printing an image on a printing plate and making a plate, the blanket can be wound up by a printing apparatus that supplies ink to the printing plate to perform printing. By having a winding shaft, and by positioning both ends of the printing device main body, a blanket winding mechanism configured to be fixed in a state substantially parallel to the blanket cylinder on the side of the blanket cylinder is provided. In this type of printing apparatus, in which it is difficult to form a sufficient space on the side of the blanket cylinder, it is possible to easily mount the blanket cylinder and remove the blanket cylinder.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a printing apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing an arrangement of an image area 67 on a printing plate P.

FIG. 3 is a block diagram illustrating a main electrical configuration of the printing apparatus.

FIG. 4 is a flowchart illustrating an outline of plate making and printing operations performed by the printing apparatus.

FIG. 5 is a flowchart showing a plate making process.

FIG. 6 is a schematic side view of the vicinity of a trunk opening 505.

FIG. 7 is a plan view of the vicinity of a trunk opening 505.

FIG. 8 is a schematic side view of the vicinity of a trunk opening 505.

FIG. 9 is a schematic side view of the vicinity of the trunk opening 505.

FIG. 10 is a schematic side view of the vicinity of a trunk opening 505.

11 is a side view of the winding mechanism 502. FIG.

FIG. 12 is a partial cross-sectional view of a winding mechanism 502.

FIG. 13 is a schematic diagram illustrating a state in which a winding mechanism 502 is fixed to a printing apparatus main body.

14 shows a winding shaft 52 in a winding mechanism 502. FIG.
FIG. 2 is a schematic diagram showing a state in which a blanket 501 is wound up in FIG.

FIG. 15 is an explanatory diagram showing a mounting process of the blanket 501.

FIG. 16 is an explanatory diagram showing a mounting process of the blanket 501.

FIG. 17 is an explanatory diagram showing a mounting process of the blanket 501.

FIG. 18 is an explanatory diagram showing a mounting process of the blanket 501.

[Explanation of symbols]

 Reference Signs List 11 first plate cylinder 12 second plate cylinder 13 first blanket cylinder 14 second blanket cylinder 15 pressure cylinder 16 paper feed cylinder 17 paper discharge cylinder 20 ink supply device 21 dampening solution supply device 23 plate supply unit 24 Plate discharging unit 25 Image recording device 26 Developing device 27 Paper feeding unit 28 Paper discharging unit 501 Blanket 502 Winding mechanism 503 Mounting bracket 504 Mounting bracket 505 Body opening 506 Front end holding mechanism 507 Rear end holding mechanism 522 Winding Shaft 523 Holding groove 524 Positioning pin 526 Positioning plate 532 Positioning block 534 Positioning pin 535 Positioning block P Printing plate

Claims (3)

[Claims] 1. A blanket mounting method for a printing apparatus for mounting a blanket on an outer peripheral portion of a blanket cylinder in a printing apparatus, comprising: a blanket winding step of winding the blanket around a winding shaft; and winding the blanket. A winding shaft fixing step of fixing the winding shaft in a state substantially parallel to the blanket cylinder by positioning both ends of the winding shaft in the printing apparatus main body; and winding the winding shaft. A tip holding step of holding a tip of the blanket by a tip holding mechanism provided on the blanket cylinder; and rotating the blanket cylinder to rotate the blanket wound on the winding shaft into the blanket cylinder. A blanket unwinding process to unwind around the outer periphery of the Blanket mounting method for a printing apparatus, characterized in that the rear end portion of the blanket which is including a rear portion holding step for holding by the blanket cylinder to be disposed the rear end holding mechanism. 2. A blanket removing method of a printing apparatus for removing a blanket mounted on an outer peripheral portion of a blanket cylinder from the blanket cylinder in the printing apparatus, wherein both ends of a winding shaft configured to be capable of winding the blanket. By positioning the unit on the printing device body,
A winding shaft fixing step of fixing the winding shaft in a state substantially parallel to the blanket cylinder, and releasing a rear end holding state of the blanket by a rear end holding mechanism provided on the blanket cylinder. A rear end holding release step of inserting; a rear end insertion step of inserting a rear end of the blanket released from the holding state by the rear end holding mechanism into a holding groove formed in the winding shaft; A blanket winding step of winding a blanket mounted on an outer peripheral portion of the blanket cylinder around the winding shaft by rotating the cylinder and the winding shaft; and a tip holding mechanism disposed on the blanket cylinder. And a rear end holding releasing step of releasing the holding state of the leading end of the blanket according to the above method. . 3. A printing apparatus for recording an image on a printing plate, making a plate, and then supplying ink to the printing plate to perform printing, comprising: an image recording device for recording an image on the printing plate; A plate cylinder for holding a printing plate on which an image is recorded by the image recording device, an impression cylinder capable of holding printing paper on the outer periphery thereof, and a printing plate held on the outer periphery of the plate cylinder from the impression cylinder. A blanket cylinder mounted with a blanket for transferring ink to printing paper held on the outer peripheral portion of the outer peripheral portion thereof, and a winding shaft capable of winding the blanket,
By positioning both ends of the printer body,
A printing apparatus comprising: a blanket winding mechanism configured to be fixable in a state substantially parallel to the blanket cylinder on a side of the blanket cylinder.