JPH0336666B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a plate head gripping device used in printing presses, etc., and in particular, to a plate head gripping device that enables automatic plate feeding and ejection while firmly gripping the plate head. Concerning a plate head gripping device.

(Prior art and its problems) In conventional printing machines that are capable of automatic plate feeding, the plate head is generally pressed against the plate cylinder side by a plate head holding member provided on the plate cylinder. It is configured to perform latching. However, in this type of printing press, the pressing force of the plate head holding member is only applied by a spring, so the plate head holding force is weak and there is a problem that the plate may fall off during printing. Was.

On the other hand, in order to prevent the plate from falling off, a printing press has been proposed that uses a vise mechanism to strongly grip the plate head in addition to the pressure force provided by a spring. Another problem is that automatic plate feeding and ejection cannot be performed because the force mechanism is manually set and reset.

(Object of the Invention) The present invention was made in order to solve the above-mentioned problems, and an object of the present invention is to provide a plate head gripping device that can prevent plates from falling off while enabling automatic plate feeding and ejection.

(Means for Achieving the Object) In order to achieve the above object, the plate head gripping device of the present invention holds the plate head in pressure contact with the plate cylinder by rotating forward and backward around a rotating shaft attached to the plate cylinder. - A plate head gripping member to be released is provided, and this plate head gripping member is rotationally biased in the plate pressure contact direction by a biasing means such as a spring. Also, during plate feeding/discharging operation, the plate cylinder is
within the range from the rotational position to the second rotational position,
A plate head gripping member operating mechanism is provided which rotates the plate head gripping member in a plate pressure release direction against the biasing force of the biasing means. Further, after the plate cylinder passes through the second rotation and the plate head is pressed against the plate head gripping member by the urging force of the urging means, a rotational force in the plate pressure contact direction is applied to the plate head gripping member. Further, a vise mechanism for applying a force is provided, and a vise release mechanism is provided for releasing the rotational force applied by the vise mechanism in the plate pressure contact direction before the plate cylinder enters the first rotational position.

(Example) The plate head gripping device of the present invention will be explained by taking the following printing machine as an example.

A. General Structure FIG. 1 shows a schematic cross-sectional view of a multicolor offset printing machine that is capable of printing on continuous paper. As shown in the figure, a blanket cylinder 2 is disposed approximately in the center of the printing press body 1, and this blanket cylinder 2
Plate cylinders 3 and 4, which can be freely attached to and taken off from the blanket cylinder 2, are disposed at an upper rear position and a lower rear position, respectively. At the rear of these plate cylinders 3, 4, there are plate supply/discharge units 5, 6 that enable automatic plate supply/discharge to the corresponding plate cylinders 3, 4, and plate supply/discharge units 5, 6 for automatically supplying/discharging plates to/from the corresponding plate cylinders 3, 4, as well as plate supply/discharge units 5, 6 for automatically supplying/discharging plates to/from the corresponding plate cylinders 3, 4. Inking units 7 and 8 for inking are each removably attached, and supply and discharge plate trays 9 and 10 are detachably attached to each plate supply and discharge unit 5 and 6, respectively.

On the other hand, an impression cylinder 11 that can be freely attached to and removed from the blanket cylinder 2 is disposed at a lower front position of the blanket cylinder 2, and an impression cylinder 11 and a blanket cylinder 2 are installed at a lower rear position and a front position of the impression cylinder 11. A pin feed tractor 13 and a suction conveyor 1 for controlling the paper feed of the continuous paper 12 passed between them.
4 are arranged respectively. These pin feed tractor 13 and suction conveyor 14 are connected to the impression cylinder 11.
Printing is performed on the continuous paper 12 by controlling the paper feed of the continuous paper 12 intermittently in relation to the timing of the loading and unloading of the blanket cylinder 2. Further, at the front position of the printing press main body 1, a swing guide 1 is provided for storing printed continuous paper 12 in an alternately folded manner.
5, and a folding machine 17 having a continuous paper holder 16 which can be raised and lowered is disposed. Furthermore, an impression cylinder cleaning unit 29 is provided below the impression cylinder 11 to remove dirt from the surface of the impression cylinder.

Further, at the upper front position of the blanket body 2, a cleaning liquid supply unit 18 for supplying cleaning liquid to the blanket body 2 and a wiping unit 19 for wiping off the cleaning liquid are removably attached. There is.

A main motor 20 is disposed in the lower space of the printing press body 1, and the blanket cylinder 2 and the suction conveyor 14 are driven by the main motor 20 via, for example, a belt. The impression cylinder 11 is mechanically interlocked with gears disposed to mesh with each other at one end of each cylinder, forming a drive system using a main motor 20. Drive devices or actuators such as pulse motors and solenoids are attached to the remaining mechanical parts as necessary, and sensors and switches are installed at predetermined and necessary locations as information input means for controlling the drive timing of these drive systems. It is installed.

FIG. 2 schematically shows the control system used in this printing press, in which a microprocessor 21 is connected to a control bus 22 and each control section 23.
It is connected to external devices 24-28 via. The system program is stored in an external storage device 24 such as a floppy disk,
At the beginning of system startup, the microprocessor 21
given to. The operator gives commands through an operation panel 25 installed on the side of the printing press, and the microprocessor 21 sends commands to sensors and switches 26, 27.
The drive system 28 of motors, solenoids, etc. is loaded according to the system program by importing necessary information from
Operate as appropriate.

The configuration, operation, etc. related to feeding and discharging plates will be explained below.

B. Plate supply/discharge relation (1) Configuration and installation of plate supply/discharge unit (a) Configuration of plate supply/discharge unit Figure 3 shows the plate supply/discharge unit 5. In the figure, figure a is a front view of the plate supply/discharge unit 5, figure b is a plan view, figure c is a sectional view, figure d is a right side view, and figure e is a left side view.

This supply/discharge plate unit 5 has a handle 502 and unit mounting screws 503 attached to both front sides of a unit frame 501 having a frame-like structure. A locking pin 504 and a positioning pin 505 for attaching the feeding and discharging plate tray 9 (FIG. 1) are protrudingly provided on the front portions of the inner surfaces of the left side plate 501a and the right partition plate 501b of the unit frame 501. In addition, the left side plate 501a and the right side plate 5 of the unit frame 501 are
A unit mounting rail 506 is attached to the lower part of the outer surface of the unit 01c. Also, the right side plate 5
A connector 508 is attached to the outer surface of 01c via a mounting bracket 507, and a pulse motor 509 for plate feeding start is attached.
are installed, and these pulse motors 509
and a connector 508 are electrically connected via a cord (not shown).

Left side plate 501 of unit frame 501
A plate feeding drive roller 510 and a plate discharge drive roller 511 are rotatably attached between the plate a and the right partition plate 501b. Plate feeding drive roller 5
10, the right end of the roller shaft 510a is connected to the pulse motor 509 via a shaft coupling (not shown), and when plate feeding is started, the pulse motor 509 moves the roller shaft 510a as shown in FIG.
Rotationally driven in the counterclockwise direction. The right end of the roller shaft 511a of the plate discharge drive roller 511 is connected to the right partition plate 501b and the right side plate 501c.
A gear 51 is attached to the extended part.
2 (Fig. 3 d) is installed, and this gear 5
12 is connected to a drive gear 514 via another gear 513, which is also arranged between the right partition plate 501b and the right side plate 501c. This drive gear 514 is connected to the plate cylinder gear 30 when the plate supply/discharge unit 5 is mounted on the printing press main body 1.
1 (Fig. 9), and as a result, as the plate cylinder 3 rotates during plate feeding and discharging,
The plate discharge drive roller 511 is rotated counterclockwise in FIG. 3c.

In the intermediate region between the plate feeding drive roller 510 and the plate discharge drive roller 511, a support metal fitting 515 is stretched between the left side plate 501a and the right partition plate 501b.
A plate feeding start plate 516 is attached to the top side, and a plate discharge guide 51 is attached to the bottom side.
7 is installed. Plate feeding start plate 516
A roller exit/exit opening 516a is formed at a position corresponding to the plate feeding drive roller 510.

At the front position of the plate feeding start plate 516, the left side plate 501a and the right partition plate 501b
A drive shaft 518 is rotatably spanned between them, support arms 519 are attached to both ends of the drive shaft 518, and a plate feeding auxiliary drive roller 52 is installed between the tips of these support arms 519.
0 is rotatably mounted. An operating lever 521 is attached to the left end of the drive shaft 518, as shown in FIG. The plate feeding auxiliary drive roller 520 is configured to be able to be driven toward and away from the plate feeding drive roller 510 via the roller retracting opening 516a. This operating lever 521 is biased to rotate in the counterclockwise direction by a spring 522 shown in FIG.
At the position where 0,520 is away, the actuating lever 5
21 is engaged with a stopper pin 523 protruding from the outer surface of the left side plate 501a to restrict rotation. This actuating lever 521 is driven in conjunction with the ON operation of a solenoid (described later) provided on the printing press main body 1 side, and brings the plate feeding auxiliary drive roller 520 into contact with the plate feeding drive roller 510. Rollers 510 and 520 nip the plate to enable plate feeding to start. The plate feeding auxiliary drive roller 520 connects a gear (not shown) attached to the left end of the roller shaft 520a to the plate feeding drive roller shaft 510.
It meshes with a gear (not shown) attached to the left end of the plate a, so that when the plate feeding drive roller 510 is rotationally driven in the counterclockwise direction in FIG. 3c during plate feeding, the plate feeding auxiliary drive is activated. The roller 520 is rotated clockwise at the same circumferential speed as the roller 510, and the plate sandwiched between the rollers 510 and 520 is moved toward the plate cylinder (to the right in FIG. 3c). It is configured to be sent out.

At the upper rear end of the unit frame 501, there is a left side plate 501a and a right partition plate 501.
A rotating shaft 524 is rotatably attached between
It is rotatably mounted on the The roller support arm 526 is biased to rotate in the clockwise direction (i.e., in the plate pressing direction) in FIG. 3c by a torsion coil spring 527 (FIG. 3b) attached to the rotating shaft 524, and is rotated at an appropriate position as shown in the figure. Clockwise rotation is regulated by a stopper mechanism that omits the .

As shown in FIG. 4, a locking mechanism 528 is provided at the right end of the rotating shaft 524 for locking the plate feeding press roller 525 at the plate holding position. In this locking mechanism 528, a ratchet wheel 529 having an engagement groove 529a on the outer periphery is fixed to a rotating shaft 524, and a plate feeding presser arm 531 holding a plate feeding presser actuating roller 530 is also fixed to the rotating shaft 524. Ru. The plate feeding presser actuating arm 531 is configured to be rotatable within the range shown by the imaginary line and the solid line in FIG. 4b.
31 is urged to rotate in the clockwise direction in FIG. 4b by a spring 532 (FIG. 4a), so that the plate feeding press roller 525 is separated from the plate cylinder 3 via the shaft 524 at the clockwise rotation position. configured. On the other hand, a lock release arm 533 with a lock release roller 537 attached to its tip and a ratchet 534 are integrally connected and rotatably attached to a shaft 535 provided on the right partition plate 501b.
The spring 536 rotates the latch 534 counterclockwise in the counterclockwise direction in FIG.
9b and the valley portion 529a are slidably pressed against each other.

This lock mechanism 528 is connected to a plate feeding presser roller cam 356 (a first
8 (details will be described later), when the plate feeding presser operating roller 530 is pushed in the counterclockwise direction in Fig. 4b, the rotating shaft 524 also rotates counterclockwise, and the plate feeding presser roller 525 is pushed in. It is set at the printing press position. At the same time, the ratchet wheel 529 also rotates counterclockwise, and with this rotation, the tip of the ratchet 534 moves from the outer circumference 529b of the ratchet wheel 529 to the trough 529.
At this time, the latch wheel 529 falls into the trough 529a and is locked by the biasing force of the spring 536, preventing the latch wheel 529 from rotating back in the clockwise direction due to the biasing force of the spring 532, and the plate feeding presser roller 525 is held at the presser position. This lock is released by kicking up the lock release roller 537 using the lock release cam 306 provided on the plate cylinder 3 side. When the lock release roller 537 is kicked up, the lock release arm 533 moves to the fourth position with the shaft 535 as a fulcrum.
The latch 534 rotates clockwise in FIG. The fourth plate presser operating arm 531
By rotating clockwise in FIG. b, the plate feeding press roller 525 returns to its original position separated from the plate cylinder 3.

Returning to FIG. 3 again, at the lower rear end of the unit frame 501, the left side plate 50
Rotating shaft 538 between 1a and right partition plate 501b
is rotatably attached, and a support arm 540 holding a discharge plate pressing roller 539 is fixed to the rotating shaft 538. This rotating shaft 5
38 is biased by a spring (not shown) in the clockwise direction in FIG. Additionally, a third
As shown in FIG.
A stopper pin 542 for restricting clockwise rotation of the actuating lever 541 is provided protruding from the outer surface of the right side plate 501c at a position away from the operating lever 541. The operating lever 541 is rotated in the counterclockwise direction in FIG. Set it in the position where it will be pressed.

Further, as shown in FIG. 3c, a plate presence detection sensor 544, which is a reflective photoelectric sensor, is attached above the support arm 519 to confirm the set state of the plate.

(b) Configuration of the side where the supply/discharge plate unit is attached Next, the configuration of the side where the supply/discharge plate unit 5 is attached will be explained. FIG. 5a shows a back view of the printing press main body 1, and FIG. 5b shows the fifth
Fig. 3 shows an inner side view of the left side plate 101 shown in Fig. a.

As shown in the figure, a pair of left and right rail receiving members 126 are fixed to the inner surfaces of the left side plate 101 and the right side plate 102. The rail receiving member 126 has the printing press main body 1 on the opposing inner surface.
It has a rail fitting groove 127 extending horizontally from the back side toward the inside of the printing press body 1, and a screw hole 128 is formed on the front side.

At the upper position of the front end of the right rail receiving member 126, the connector 129 is connected to the mounting bracket 1.
It is attached to the right side plate 102 via 30. This connector 129 is connected to the microprocessor 21 via the control section 23 shown in FIG.

At the upper position of the rear end of the right rail receiving member 126, the supply/discharge plate unit 5 (FIG. 3)
A drive lever 131 is disposed for operating the plate discharge pressing roller 539 to be attached to and removed from the plate cylinder 3. This drive lever 131 has an engagement pin 132 at its tip that engages with an operating lever 541 (FIG. 3d) of the plate supply/discharge unit 5, and is connected to a drive shaft 133 rotatably attached to the right side plate 102. Fixed. The right end of the drive shaft 133 is extended outward from the right side plate 102, and a lever 134 is attached to the right end as shown in FIG. 7 (the right side plate 102 is not shown for convenience of explanation).
is installed. And this lever 13
A spring 135 for urging the lever 4 to rotate counterclockwise in FIG. 7 is connected to one end of the lever 134, and
A solenoid 137 is attached to the right side plate (not shown), which spans between the right side plates (not shown) and rotates the lever 134 clockwise.
connected by. This solenoid 137
When energization is performed, the lever 134 is driven to rotate clockwise in FIG. is set to Then, when the solenoid 137 is de-energized, the lever 134 rotates counterclockwise due to the biasing force of the spring 135 and returns to its original position, and the drive lever 131 also rotates counterclockwise accordingly. The operating lever 541 of the supply/discharge plate unit 5 is returned to the position where it is released.

On the other hand, the left rail receiving member 126 (fifth
In the upper position of the plate feeding/discharging unit 5, the plate feeding auxiliary drive roller 520 (the third
A drive lever 140 is disposed for moving the plate feeding roller 510 to and from the plate feeding drive roller 510. This drive lever 140 has an engagement pin 141 at its tip that engages with the operating lever 521 of the plate supply/discharge unit 5, and is fixed to a drive shaft 142 rotatably attached to the left side plate 101. The left side plate 101 of this drive shaft 142 is extended outwardly, and the left side plate 101 is
(omitted), a lever 143 is attached. A spring 144 for rotating this lever 143 in the clockwise direction in FIG. Solenoid 146 for driving
is attached to the left side plate (not shown),
This solenoid 146 and lever 143 are connected by a spring 148. Further, a stopper pin 149 for restricting the counterclockwise rotation of the lever 143 is provided to protrude from the left side plate. When this solenoid 146 is energized, the lever 143 is rotationally driven in the counterclockwise direction in FIG.
1 is set to the operating position. Then, when the solenoid 146 is de-energized, the lever 143 is moved by the biasing force of the spring 144.
rotates clockwise and returns to its original position,
Along with this, the drive lever 140 also rotates clockwise and returns to the position where the operating lever 521 of the plate supply/discharge unit 5 is released.

(c) Attaching the plate supply/discharge unit Next, the procedure for attaching the plate supply/discharge unit 5 to the printing press main body 1 will be explained. This installation requires the solenoids 137 and 146
Both are performed in a state where no current is applied.

The mounting procedure is to lift the supply/discharge unit 5 by holding the handle 502 with both hands, and then attach the rail 506 to the rail receiving member 1 as shown in FIG.
26 into the rail fitting groove 127, and push the supply/discharge unit 5 deep. When the feeding/discharging plate unit 5 is pushed all the way in, the unit mounting screw 503 is tightened and fixed into the screw hole 128 of the rail receiving member 126, and the unit mounting work is completed.

In this way, when the supply/discharge plate unit 5 is installed, the unit side connector 508 (third
Figure) is the connector 129 on the printing press main body 1 side.
(FIG. 5), and the pulse motor 509 and plate presence detection sensor 544 (FIG. 3) of the plate supply/discharge unit 5 are electrically connected to the microprocessor 21 (FIG. 2).

Furthermore, as shown in FIG.
It engages with the engagement pin 132 of. Therefore, if the solenoid 137 is energized in this state, the drive lever 131 will rotate clockwise around the drive shaft 133, and the actuating lever 5 will rotate accordingly.
41 is rotated counterclockwise about the rotating shaft 538, and the discharge plate pressing roller 53
9 is set at the printing press position. Further, when the energization to the solenoid 137 is released, the discharge presser roller 539 returns to its original position separated from the plate cylinder 3 by an operation opposite to that described above.

Further, when the unit is installed, as shown in FIG. 6, the tip of the operating lever 521 of the plate supply/discharge unit 5 engages with the engagement pin 141 of the drive lever 140 provided on the printing press main body 1 side. Therefore, if the solenoid 146 is energized in this state, the drive lever 14
0 rotates counterclockwise about the drive shaft 142, and accordingly, the operating lever 521 is rotated clockwise about the drive shaft 518,
Plate feeding auxiliary drive roller 5 of plate feeding/discharging unit 5
20 is set at a position where it comes into pressure contact with the plate feeding drive roller 510. Also, solenoid 14
6, the plate feeding auxiliary drive roller 520 returns to its original position separated from the plate feeding drive roller 510 by an operation opposite to that described above.

Removal of the plate supply/discharge unit 5 can be performed by following the procedure reverse to the procedure for mounting.

The supply/discharge plate unit 6 is the same as the supply/discharge plate unit 5.
The structure is the same as that of the plate supply/discharge unit 5, and its attachment/detachment work is performed in the same manner as in the case of the plate supply/discharge unit 5.

(2) Structure and installation of plate supply/discharge tray FIG. 8a shows a plan view of the plate supply/discharge tray 9, and FIG. 8b shows its side view. This plate feeding/discharging tray 9 is provided with a plate feeding table 901 for sending out plates for plate feeding at the upper part thereof, and a plate discharging table 90 for accommodating the plate to be discharged at the lower part.
2 is provided. A plate bottom positioning member 903 for positioning the plate bottom end of the plate is attached to the upper rear position of the plate feeding table 901.
Side positioning members 904 for positioning both sides of the plate are attached to both sides of the upper surface of 01. In addition, tray attachment hooks 905 are formed on both sides of the front end of the plate supply/discharge tray 9.

The installation of this plate supply/discharge tray 9 is shown in Figure 3c.
As shown in FIG.
02a is inserted into the plate supply/discharge unit 5, hook portions 905 are hooked on the locking pins 504, and both front ends 906 of the tray 9 are locked on the positioning pins 505. To remove the tray 9, follow the above procedure in reverse.

The plate feeding and discharging tray 10 (FIG. 1) has the same structure as the plate feeding and discharging tray 9, and the operation of attaching and removing it to the plate feeding and discharging unit 6 is performed in the same manner as the plate feeding and discharging tray 9.

(3) Plate cylinder and mechanism on the printing press main body side FIG. 9 shows a view of the plate cylinder 3 viewed from the back side of the printing press main body 1. As shown in the figure, the plate cylinder 3 has a plate cylinder gear 301 fixed to its right end, and the plate cylinder 3 and the plate cylinder gear 301 are rotatably held on a plate cylinder support shaft 302. Plate cylinder support shaft 3
02 is provided with eccentric shafts 303 having a rotation center 303a eccentric to the axis 302a of the plate cylinder support shaft 302 at both ends thereof, and these eccentric shafts 303 are connected to the left and right side plates 101 of the printing press main body 1,
It is rotatably held by a bearing 304 attached to 102. This rotational drive of the plate cylinder 3 moves the plate cylinder gear 301 to the blanket cylinder 2 (first
This is done by meshing with the blanket body gear (not shown) provided at the right end of the
Further, the plate cylinder 3 is moved to and from the blanket cylinder 2 by driving the eccentric shaft 303 to rotate forward and backward within a certain angle using, for example, a pulse motor.

This plate cylinder 3 is provided with an opening 307 in a part of its outer periphery over the entire width along the axial direction. Furthermore, a plate head gripping mechanism 30 is provided at one end and the other end in the circumferential direction of the opening 307.
8 and a plate bottom gripping mechanism 309 are respectively arranged.

Hereinafter, the configurations of the plate cylinder side and the printing press main body side will be explained in order by dividing into each part.

Print head gripping mechanism The plate head gripping mechanism 308, as shown in FIGS. 9a, 10b, and 11b,
A claw shaft 311 is rotatably spanned between the left and right sides 310, 310 of the plate cylinder, and the claw shaft 31
A plurality of plate head gripping claws 312 are fixed to the outer circumferential portion of 1 at equal pitches along the axial direction.
Links 31 are located near both ends of the claw shaft 311.
3 is fixed, and the tip of this link 313 and the spring receiving pin 3 fixed inside the plate cylinder 3
A tension spring 326 is suspended between 14, and the plate head gripping claw 312 uses the claw shaft 311 as a fulcrum,
It is urged to rotate in the clockwise direction of FIG. 10b, that is, in the claw closing direction. This version head and mouth claw 3
The opening operation of No. 12 is performed by a plate head gripping claw actuation mechanism (described later) provided on the left end side of the plate cylinder 3.
This is done by

On the other hand, a plate head positioning pin 315 is provided protruding from the opening edge of the plate cylinder 3 at a position opposite to the plate head gripping claw 312 . Then, the plate head gripping mechanism 308 closes the plate head gripping claw 312 so that the pin hole provided in the plate head of the plate (not shown) engages with the plate head positioning pin 315. It is carried out by creating an act.

Plate Bottom Grasping Mechanism As shown in FIG. 9a and FIG.
A plurality of plate bottom hooks 317 are fixed at equal pitches along the axial direction. A torsion coil spring 318 is externally mounted near the right end of the hook shaft 316, and the plate end hook 317
is urged to rotate around the hook shaft 316 in the counterclockwise direction in FIG. 25, that is, in the plate bottom tension direction. Further, a link 319 is fixed to the right end of the hook shaft 316 on the outside of the plate cylinder gear 301, and this link 319
The plate bottom hook 317 is rotated in both forward and reverse directions by a plate bottom hook operating mechanism to be described later.
The operations of grabbing the end of the plate and releasing the end of the print are performed.

Plate supply/discharge cam mechanism The left side plate 101 of the printing press main body 1 has a first plate feed/discharge cam mechanism.
A feeding/discharging plate cam mechanism shown in FIG. 0 and FIG. 11 (the left side plate 101 is omitted for easy understanding. The same applies to the following drawings) is provided. This plate supply/discharge cam mechanism is constructed as follows.
That is, the solenoid 150 is connected to the left side plate 10.
1, and a shaft 151 is rotatably attached to pass through the left side plate 101, and a link 152 and a set lever 153 are fixed to the outer and inner ends of the shaft 151, respectively. . Also, a set roller 1 is attached to the tip of the set lever 153.
54 is attached. Furthermore, link 15
A spring 155 is stretched between the set lever 153 and the solenoid 150, and the set lever 153 and the left side plate 1
A return spring 156 for biasing the set lever 153 to rotate in the clockwise direction is stretched between 01 and 01. On the other hand, the supply/discharge version cam 157
A shaft 158 protruding from the inner surface of the left side plate 101
A lock lever 159 is also rotatably attached via another shaft 160 that also protrudes from the inner surface of the left side plate 101, and a tension spring is connected between the supply/discharge plate cam 157 and the lock lever 159. 161 is tensioned, and the counterclockwise rotation of the lock lever 159 is caused by the lock pin 1 provided at the tip of the supply/discharge plate cam 157.
It is regulated by being locked to 57a.

The operation of the plate feeding and discharging plate cam mechanism is as follows. That is, when the solenoid 150 is turned on, the link 152 rotates counterclockwise in FIG. 10 via the spring 155.
Accordingly, the set lever 153 similarly rotates counterclockwise about the shaft 151 as a fulcrum against the biasing force of the return spring 156. As a result of this rotation, the plate supply/discharge cam 157 is pushed by the set roller 154 and rotates counterclockwise around the shaft 158 as a fulcrum.
When the lock pin 157a rotates by a predetermined angle, the lock pin 157a moves into the groove 15 of the lock lever 159.
9a, the supply/discharge plate cam 157 is held (ie, locked) in its rotational position. After the feed/discharge plate cam 157 is locked, when the solenoid 150 is turned off, the suction force of the spring 155 is released, and the link 152 and the set lever 153 are rotated clockwise around the shaft 151 by the biasing force of the return spring 156. , return to the original position. In this case, the feeding/discharging plate cam 157 remains held at the lock position. As shown in FIG. 16, the plate supply/discharge cam 157 is unlocked by the tip of the lock lever 159 being lifted up by the roller 320 provided on the plate cylinder 3 side as the plate cylinder 3 rotates counterclockwise. It is done. That is, when the lock lever 159 is lifted up, the lock pin 157a provided on the plate supply/discharge cam 157 is removed from the groove 159a of the lock lever 159, and the plate supply/discharge cam 157 is rotated clockwise by the tensile force of the tension spring 161. It returns to its original position as shown in Figure 17. In this way, the lock on the supply/discharge plate 157 is released.

Plate head gripping claw operating mechanism As shown in FIGS. 10a and 11a, on the outer surface side of the left side 310 of the plate cylinder 3,
A plate head gripping claw actuation mechanism is provided. This operating mechanism is constructed as follows.
That is, the left end portion of the pawl shaft 311 shown in FIG. 10b is extended to the outside of the left side portion 310 of the plate cylinder 3 shown in FIG. 10a, and the link 321 is connected to the extended portion. Further, another link 322 is connected to the left side 310 of the plate cylinder 3.
It is rotatably attached to a shaft 323 provided in the. This link 322 has rollers 320 and 324 attached to its intermediate position and tip position, respectively. Also, link 32
A tension spring 325 is tensioned between the link 322 and the left side 310, and the link 322 is urged to rotate counterclockwise about the shaft 323, and the rotation is regulated by locking the roller 324 to the link 321. ing.

The operation of this plate head gripping claw operating mechanism is as follows. That is, first, Figure 10a
As shown in FIG. 11A, after the plate feeding/discharging cam 157 is locked and the plate head holding vise mechanism described later is unlocked, the link 32 is opened as the plate cylinder 3 rotates to the left, as shown in FIG. 11a.
The second roller 320 rides on the cam surface 157b of the supply/discharge plate cam 157, and the cam surface 157
b Roll on top. This causes link 322
rotates counterclockwise around the shaft 323, and a roller 324 provided at the tip of the link 322 rotates the other link 32.
1 is pushed to the left (see FIG. 15b), and the claw shaft 311 rotates to the left (see FIG. 15c). In this way, as the pawl shaft 311 rotates to the left by overcoming the tension spring 326 shown in FIG. Perform the "Open" action. As the plate cylinder 3 further rotates, the roller 320 of the link 322 is rotated as shown in FIG.
When the roller 320 reaches the concave portion 157c of the plate supply/discharge cam 157, the roller 320 falls into the concave portion 157c, and the pressing by the plate supply/discharge cam 157 is released. In this way, the links 322 and 321 are released from the regulation of the supply/discharge plate cam 157.
They can rotate clockwise around the shaft 323 and the claw shaft 311, respectively, and the claw shaft 31
1 is rotated clockwise by the tensile force of the tension spring 326 (Fig. 11), and the plate head gripping claw 312
(FIG. 10b) performs a "close" operation. Plate cylinder 3
When the plate further rotates, the lock lever 159 is kicked up by the roller 320, and the plate feed/discharge cam 157 is unlocked, as described above.

Plate head gripping vise mechanism and vise release mechanism On the outer surface side of the left side 310 of the plate cylinder 3, there are shown in FIG. 10a, FIG. 11a, FIG.
As shown in the drawings and FIG. 17, in addition to the above-described plate head gripping claw operating mechanism, a plate head gripping vise mechanism and a vise releasing mechanism are provided. Among these, the plate head gripping vise mechanism is constructed as follows. That is, as shown in FIG. 16, a link 327 is rotatably attached to the left side 310 of the plate cylinder 3 via a shaft 328, and rollers 329 and 330 are attached to the center and tip positions of this link 327, respectively. It will be done. Further, another link 331 is rotatably attached to the left side portion 310 via a shaft 332, and the roller 330 of the link 327 is slidably engaged with an elongated hole 331a formed in the link 331. Furthermore, a pin 3 is attached to the tip of the link 331.
Another link 334 is rotatably connected through 33, and the other end of this link 334 and the tip of link 321 are rotatably connected through another pin 335. A stopper 336 protruding from the left side 310 of the plate cylinder 3 is provided at an inward position of the link 331 to restrict clockwise rotation of the link 331. In addition, the left side 310 and the link 327
In between, a link 32 is formed as the plate cylinder 3 rotates.
A tension spring 337 is tensioned to relieve the centrifugal force acting on 7. Furthermore, a plate head gripper lock cam 162 for pushing the roller 329 of the link 327 inwardly into the plate cylinder 3 is fixed at a predetermined position on the printing press main body 1 side.

The operation of this plate head gripping claw vise mechanism is as follows. That is, as shown in FIG. 16, immediately after the roller 320 of the link 322 fits into the recess 157c of the plate supply/discharge cam 157, the plate head gripping claw 312 closes and the plate head grip is performed. The roller 329 of the link 327 is pressed against the plate head gripper lock cam 162, and the link 327 rotates clockwise about the shaft 328 as a fulcrum. When the link 327 rotates clockwise, the roller 330 of the link 327 slides within the elongated hole 331a of the link 331.
The link 331 is rotated clockwise around the shaft 332. In this way, when the pin 333 moves from the position shown in FIG. 16 to the straight line connecting the pin 335 and the shaft 332, the claw shaft 31
1 strongly clockwise and hold the block head with the nail 31.
A strong pressing force is applied to 2. When the link 331 further rotates clockwise and the pin 333 moves to a position slightly beyond the top dead center as shown in FIG. A strong and stable pressing force is continuously applied to the head gripping claw 312.

On the other hand, the vise release mechanism for releasing the lock of the plate head gripping claw vise mechanism is constructed as follows. That is, as shown in FIGS. 10a and 11a, the link 33
8 is connected to the shaft 339 (link 322
The link 338 is rotatably connected to the tip of the link 322 via a roller 324 (which also serves as the rotating shaft attached to the tip of the link 338), and rollers 341 and 342 are attached to one end and the other end of the link 338.

The function of this vise release mechanism is as follows. That is, when the plate cylinder 3 rotates to the position shown in FIG. 10a with the vise mechanism locked, the plate supply/discharge cam 157 is locked by the method described above, and then the plate supply/discharge cam 157 is As shown in FIG. 15a, the roller 341 of the link 338 runs over. This causes the link 338 to
Rotate clockwise using 39 as a fulcrum, link 338
A roller 342 attached to the end of the plate presses the link 334 toward the outer circumference of the plate cylinder. When the link 334 is pressed, the link 334 rotates clockwise about the pin 335, and at the same time, the link 331 rotates counterclockwise about the shaft 332. As a result, the pin 335 and the shaft 33
Connect the straight line connecting 2 (i.e. top dead center) to pin 3
33 passes by, the vise mechanism is unlocked, and the link 321 can rotate to the left around the pawl shaft 311.

Plate head extrusion mechanism A plate head extrusion mechanism is provided in the plate cylinder 3, as shown in FIGS. 9a, 12, 13, and 14. This plate head extrusion mechanism is constructed as follows. That is, the link 34 is attached to a shaft 342 rotatably spanned between the left and right side parts 310, 310 of the plate cylinder 3.
One end of 3 is fixed, and a plate extrusion claw 3 is attached to the tip.
Elongated hole 344b of link 344 with 44a
A shaft 346 fixed in the plate cylinder 3 is slidably engaged with the link 344.
The rear end and the tip of the link 343 are connected to the shaft 3.
45, they are rotatably connected. A plurality of these links 343, 344 are arranged along the rotational axis direction of the plate cylinder 3 in correspondence with each plate head positioning pin 315, and each of the links 343, 344 is
42 rotates forward and backward, the link 344 advances and retreats via the link 343, and the plate ejecting claw 3
44a comes out from the open end surface of the plate cylinder 3,
Configured to operate "on". axis 34
The left end of the plate cylinder 3 is extended to the outside of the left side 310 of the plate cylinder 3, and a gear 34 is attached to the extended end.
A link 347 with 7a is fixed, and another link 348 with a gear 348a meshing with this gear 347a is attached to the left side 3 of the plate cylinder 3.
It is rotatably connected to a shaft 349 protruding from the outer surface of 10. A cam follower 350 is attached to the tip of this link 348.
Also, the tip of the link 347 and the left side 3
A tension spring 351 is tensioned between the
The shaft 342 is urged to rotate in the counterclockwise direction in FIG. 12, that is, the plate push-out claw 344a is urged to rotate in the "in" direction. On the other hand, a plate discharging cam 163 corresponding to the cam follower 350 is fixed to a shaft 158 which also serves as a rotating shaft of the plate supplying and discharging cam 157, and is operated within a predetermined range around the shaft 158 in conjunction with the operation of the plate supplying and discharging cam operating mechanism described above. It is configured to rotate in forward and reverse directions.

The operation of this plate head extrusion mechanism is as follows. That is, the plate discharge cam 163 is
After the plate head gripper 312 is locked in the position shown in Figure a and the plate head gripping claw 312 is opened, the plate discharge cam 1
The cam follower 350 rides on the first cam surface 163a of the link 348, and the link 348 rotates to the left about the shaft 349. link 348
When rotates to the left, as shown in Figure 13,
Due to the meshing of gears 348a and 347a, link 347 rotates clockwise about shaft 342 against the biasing force of spring 351. As a result of this clockwise rotation, the link 343 also rotates clockwise, and the plate push-out claw 344a of the link 344 performs an "out" operation. In this case, if the plate head 50a' of the plate 50' is held in advance by the plate head positioning pin 315 as shown in FIG. 12b, the plate head 50a' of the plate 50' is held by the plate pushing claw 344a as shown in FIG. 13b. 50a' is pushed out from the plate head positioning pin 315. Furthermore, when the plate cylinder 3 rotates and the cam follower 350 moves past the first cam surface 163a of the plate discharge cam 163 to the second cam surface 163b, as shown in 14a,
The link 34 due to the biasing force of the tension spring 351
8 rotates to the right around the shaft 349, which causes the links 347 and 343 to rotate to the left, causing the plate push-out claw 344a to enter.

Plate Feeding Presser Roller Cam Mechanism A plate feeding presser roller cam mechanism is provided on the right side 310 of the plate cylinder 3, as shown in FIG. This plate feeding presser roller cam mechanism is constructed as follows. That is, in the plate cylinder 3, a gear 352 is fixed at a position near the right end of the pawl shaft 311, and this gear 35
A fulcrum shaft 354 having a small gear 353 that meshes with the fulcrum shaft 353 fixed to one end thereof is rotatably attached to the right side portion 310, and a link 355 is fixed to the other end of the fulcrum shaft 354. On the other hand, the plate feeding presser roller cam 356 is connected to the fulcrum pin 357.
A pin 358 attached to the tip of the link 355 is slidably engaged with an elongated hole 356a formed in the supply/discharge pressing roller cam 356.

The operation of this plate feeding presser roller cam mechanism is as follows. That is, when the plate head gripping pawl 312 operates to "open" in the manner described above, the gear 352 fixed to the pawl shaft 311 opens.
rotates clockwise in FIG. 18b, thereby causing the small gear 353 to rotate to the left and the link 355 to rotate to the left as well. link 35
5 rotates to the left, a pin 358 provided at the tip of the link 355 slides within the elongated hole 356a of the plate feed presser roller cam 356, causing the plate feed presser roller cam 356 to rotate clockwise about the fulcrum pin 357. As a result, the plate feeding presser roller cam 356 is set at a predetermined position. Similarly, the hanto gripping nail 3
12 performs the "close" operation, the reverse operation to the above is performed, and the plate feeding presser roller cam 356 returns to its original position and is reset.

Attachment/separation operation of the plate feed press roller The plate feed press roller 525 provided in the plate supply/discharge unit 5 is attached/separated from the plate cylinder 3 in the following manner. That is, as shown in FIG. 18D, after the plate feed presser roller cam 356 is set, the plate feed presser actuating roller 530 rides on the plate feed presser roller cam 356 while the plate head gripper claw 312 is open. As a result, as shown in FIG. 19a, the plate feeding presser actuating arm 531 and the rotating shaft 524 rotate to the left, and the roller support arm 526 similarly rotates to the left, so that the plate feeding presser roller 525 is set at the plate holding position. Ru. This setting operation is performed when the plate feeding press roller 525 is located at the opening 307 of the plate cylinder 3. At the same time, as the rotary shaft 524 rotates to the left, the ratchet wheel 529 shown in FIG. The roller 525 is locked in the plate holding position. Next, the plate head gripping claw 312 moves to "close" to perform plate head gripping, and as the plate feed press roller 525 passes through the opening 307 as the plate cylinder 3 rotates, the plate feed press roller 525 closes the plate cylinder 3. and begins to press the plate 50 against the plate cylinder 3. In this case, the roller support arm 5
26 is urged to rotate counterclockwise with respect to the rotating shaft 524 by a torsion coil spring 527, so that the plate 50 is elastically pressed against the plate cylinder 3 by the plate feeding press roller 525. In this way, as the plate cylinder 3 rotates, the plate feeding press roller 525 causes the plate 5 to
0 is pressed onto the plate cylinder 3 and wound without slack.

On the other hand, on the outer periphery of the plate cylinder 3, as shown in FIG.
As shown in FIG. 3, a lock release cam 306 is fixedly provided corresponding to the lock release roller 537, and the lock release roller 537 rides on the lock release cam 306 immediately after the plate feeding operation is completed. As a result, the ratchet 5 provided integrally with the lock release arm 533
34 rotates clockwise about the shaft 535, and the tip of the ratchet 534 touches the ratchet foil 52.
9 is removed from the trough 529a. When the ratchet 534 comes off the trough 529a, the ratchet wheel 529 is urged to rotate in the clockwise direction by the spring 532 via the shaft 524 and the arm 531, as shown in FIG. Rotate clockwise until you hit 531. axis 52
4 rotates clockwise, the roller support arm 52
6 is rotated clockwise to separate the plate feeding press roller 525 from the plate cylinder 3.

Plate tail reset cam mechanism The right side plate 102 of the printing press body 1 has a
A plate bottom foot reset cam mechanism shown in FIG. 1 is provided. This plate bottom foot reset cam mechanism consists of a shaft 16 rotatably attached to the right side plate 102 (not shown).
Links 165 at the outer and inner ends of 4.
and plate bottom foot reset cam 166 are respectively fixed. Further, a spring 167 is tensioned between the link 165 and the lever 134 (already explained using FIG. 7), and the link 1
65 and a spring stopper 168 fixed to the outer surface of the right side plate 102, another spring 169 is stretched.

The operation of this plate bottom foot reset cam mechanism is as follows. That is, when the solenoid 137 is turned on, the lever 134 rotates clockwise about the shaft 133. As a result, the link 165 is rotated to the left about the shaft 164 via the spring 167, and the plate bottom foot reset cam 166 fixed to the shaft 164 is rotated to the left.
similarly rotates to the left and is prevented from rotating by being engaged with a stopper 170 (protruding from the inner surface of the right side plate 102 of the printing press main body 1) (FIG. 22). This "set" state of the plate bottom foot reset cam 166 is maintained while the solenoid 137 is on. When solenoid 137 is turned off, the exact opposite operation is performed. That is, the suction force of the solenoid 137 is released and the spring 16
9 rotates the lever 134 and the link 165 in the opposite direction, and the plate end foot reset cam 166 rotates back to its original position ("reset" state).

Plate tail hook operation mechanism The right side 310 of the plate cylinder 3 has the
A plate tail hook operating mechanism shown in FIG. 25 is provided. This plate bottom hook operating mechanism is constructed as follows. That is, as shown in FIGS. 22 and 23, a link 359 is rotatably attached to the outer surface of the right side 310 of the plate cylinder 3 via a shaft 360. This link 359 has a cam follower 3 on its outer surface.
61 is attached, a pin 362 is provided protruding from the inner surface as shown in FIG. Rotationally biased in the rotational direction. Also, the other link 364 is connected to the shaft 36
5, it is rotatably attached to the outer surface side of the right side portion 310. An inner end surface 359 of the link 359 is attached to one end of the link 364.
A roller 366 having a roller shaft end that is rotatably engaged with a is attached to the link 364.
A tension spring 367 between the other end and the right side 310
is tensioned, and the link 364 is urged to rotate clockwise about the shaft 365 as a fulcrum.
This link 364 resists the tensile force of the spring 363 by locking the shaft end of the roller 366 in the recess 359b of the link 359 in the clockwise rotation position shown in FIG. 359 (that is, lock the link 359).

On the other hand, the plate end lock set cam 17 is used to release the locked state of the link 359.
1 is attached to the printing press main body 1 side corresponding to the link 364. As shown in FIG. 24, this plate bottom footset cam 171 is
The cam mounting member 172 is rotatably attached to the tip of the cam mounting member 172 protruding from the inner surface of the right side plate 102 of the printing press body 1 via a horizontal shaft 173, and is urged to rotate clockwise by a spring 174. , rotation is regulated by a stopper portion 172a of the cam mounting member 172 at a position where the horizontal attitude is maintained. When the plate cylinder 3 rotates clockwise with the link 359 in the locked state shown in FIG.
The link 359 is unlocked. Note that if the plate cylinder 3 is manually rotated in the opposite direction during maintenance and inspection, the cam 171 and link 364
In this case, the cam 171
is pushed by the link 364 and rotates counterclockwise around the horizontal axis 173 to escape as shown in FIG. 24b, thereby avoiding damage to the link 364 and the cam 171.

On the other hand, the hook shaft 316 shown in FIG.
As described above, the plate bottom hook 317 is fixed and is biased to rotate in the counterclockwise direction by the torsion coil spring 318, and the link 319 fixed to the right end is protruded from the link 359. It is locked to a pin 362.

The operation of this plate bottom hook operating mechanism is as follows. That is, as shown in FIG. 22, after the plate bottom foot reset cam 166 is "set" by the method described above, the link 359, which is in the unlocked state as shown by the solid line in the figure, is moved to the right side of the plate cylinder 3. When the plate end foot reset cam 166 is rotated by rotation, the cam follower 361 of the link 359
rides on the plate bottom reset cam 166, and the link 359 rotates counterclockwise about the shaft 360 against the tensile force of the spring 363 to the position shown by the imaginary line in the figure. When the link 359 rotates to the left, the link 364 rotates to the right using the shaft 365 as a fulcrum due to the tensile force of the spring 367, and the fulcrum shaft end of the roller 366 rotates toward the link 3.
The link 3 is engaged with the recess 359b of the link 3
59 is locked in the position shown by the imaginary line in FIG. In this way, when the link 359 rotates to the left by a predetermined angle, the pin 362 protruding from the link 359 moves to the left and is engaged with the pin 362 as shown in FIG. Link 319 is
The hook shaft 3 resists the biasing force of the spring 318.
Rotate clockwise using 16 as a fulcrum. As a result, the plate end hook 317 fixed to the hook shaft 316 also rotates clockwise together with the hook shaft 316. In this case, as shown in FIGS. 26 and 27, when the plate 50' is attached to the plate cylinder 3, the clockwise rotation of the plate bottom hook 317 causes the plate bottom hook 317 to come off the plate bottom hole 50b'. The plate end grip is released.

Furthermore, when the plate cylinder 3 continues to rotate and reaches the rotational position shown in FIG.
1, the link 364 rotates to the left about the shaft 365. This allows the roller 366
The shaft end of the link 359 is disengaged from the recess 359b of the link 359, and the link 359 rotates clockwise about the shaft 360 due to the biasing force of the spring 363.
When the link 359 rotates clockwise, the engagement between the link 319 and the pin 362 is released, and the plate end hook 317 is moved by the spring 3, as shown in FIG.
Obtains a biasing force of 18 and rotates to the left. This left rotation, as shown by the imaginary line in Figure 25a,
This is performed while the plate feeding press roller 525 is in the "applying" operation. Therefore, if a new plate 50 is supplied, the plate bottom 50c
is pushed into the opening 307 of the plate cylinder 3 by the plate feed presser roller 525, and the plate bottom hook 317 rotates to the left. As a result, the plate bottom hook 317 is caught in the plate bottom hole 50b, and the plate bottom 50c is tensioned and held in a direction substantially tangential to the outer peripheral surface of the plate cylinder.

Plate Grip and Plate Misalignment Detection Mechanism As shown in FIG. 9b, a plate grip and a plate misalignment detection mechanism are provided on the right side of the plate cylinder 3. This detection mechanism is configured as follows. That is, the hook shaft 31
A mark member 375 is attached to a link 319 fixed to the right end of the printing press 6, and an inter-axis distance regulating member 305 is held on the plate cylinder support shaft 302 so as to maintain a predetermined posture with respect to the printing press body 1. In the distance regulating member 305,
A photoelectric sensor 376 is attached corresponding to the mark member 375. Mark member 37
5, the surface corresponding to the photoelectric sensor 376 is finished as a light reflecting surface, and the photoelectric sensor 376 is composed of a light emitting element and a light receiving element, and the mark member 375 is positioned opposite to the photoelectric sensor 376 by rotation of the link 319. When the mark member 375 is located at the mark member 375, the light projected from the light emitting element is reflected by the mark member 375 and guided to the light receiving element.

FIGS. 27 b to 27 d are diagrams showing the plate bottom gripping state after the plate feeding operation. In the figure, a curve 377 indicated by a two-dot chain line indicates the locus of the detection position detected by the photoelectric sensor 376 (FIG. 9b) as the plate cylinder 3 rotates. Now, as shown in Figures a and b, when the plate edge 50c is normally held by the plate edge hook 317, the mark member 375 is removed from the mark detection position 377, so the photoelectric sensor 376 detects the mark member 375. It will never be detected. On the other hand, as shown in figure c, if the plate bottom hole 50b is damaged and widens, or if the plate head is held incorrectly, the plate bottom hook 317
The plate bottom 50c is held at a position further rotated to the left than in the case of , and the mark member 375 is also rotated to the left about the hook shaft 316 by an amount corresponding to the amount of rotation, so that the mark member 375 moves to the mark detection position 377. Since it is located above, the mark member 375 is detected by the photoelectric sensor 376. In addition, as shown in FIG. d, the plate end hook 31
7 does not hold the plate bottom 50c, the link 319 rotates counterclockwise to the position where it engages with the pin 362, and in this case as well, the mark member 375 is located above the mark detection position 377, so the photoelectric sensor 366 Accordingly, the mark member 375 is detected.

In this way, when the plate bottom 50c is normally held by the plate bottom hook 317, the mark member 375 is not detected by the photoelectric sensor 376, and only when a plate misalignment occurs or plate clamping is not performed. Since the mark member 375 is detected by the photoelectric sensor 376, it is possible to automatically detect plate wrapping errors such as plate misalignment and plate gripping failure based on the output signal of the photoelectric sensor 376. Note that the output signal of the photoelectric sensor 376 is input to the microprocessor 21 shown in FIG. The system is configured so that the printing press stops immediately upon receiving this command.

Cross-sectional structure of plate cylinder FIG. 29 shows a cross-sectional view of the plate cylinder 3. As shown in the figure, the corner of the plate cylinder 3 between the opening end face and the outer peripheral surface of the plate cylinder is rounded. That is, on the plate head holding side, the plate head pressure contact surface 369 is in contact with the opening 3.
It is formed as a plane perpendicular to an imaginary line 371 connecting the center of 07 and the plate cylinder center 370, and this plate head pressure contact surface 369 and the plate cylinder outer peripheral surface 3
The corner portion with 72 is finished into a smooth curved surface with a radius of _R1 . Further, on the plate end gripping side, an opening end surface 373 is formed as a plane perpendicular to the virtual line 371, and this opening end surface 373 and the plate cylinder outer peripheral surface 3
The corner portion with 72 is finished into a smooth curved surface with a radius of _R2 . If such a rounded finish is applied, after the plate head 50a is held in pressure contact with the plate head pressure contact surface 369 by the plate head gripping claw 312, the plate 50 is moved to the plate feeding presser roller 5.
When the plate 50 is wrapped around the outer peripheral surface 372 of the plate cylinder while being pressed by the plate 25 (FIG. 6), the plate 50 is wrapped tightly around the outer circumferential surface of the plate cylinder without creating a gap between the plate 50 and the outer circumference of the plate cylinder. Further, even when the plate bottom 50c is held by the plate bottom hook 317 so as to be tensioned and biased inward of the plate cylinder opening, the plate bottom 50c can be fitted to the outer periphery of the plate cylinder and the winding can be completed. In this way, it becomes possible to wrap the plate 50 at a predetermined position on the plate cylinder 3 with high precision. In addition, in this embodiment, as an example of the dimensions of the radii R ₁ and R ₂ , the radius
Both R ₁ and R ₂ for 76.5 mm plate cylinder 3.
It is set to 15mm.

(4) Plate manufacturing procedure and its configuration Next, before explaining the automatic plate feeding and discharging operation, the plate 50 used in the above printing machine will be explained. This plate 50 is manufactured by the procedure shown in FIG. That is, first of all,
As shown in the figure, an original plate 51 in which a photosensitive resin layer is laminated on a polyester film base,
Cut accurately to the specified size using a cutter. Next, as shown in FIG. 9b, a plate head hole 50d is formed at the plate head position of the original plate 51 corresponding to the positioning pin 315 shown in FIG. The plate bottom hole 50 corresponds to the plate bottom hook 317 shown in the figure.
form b. In this case, the formation positions of the plate head hole 50d and plate bottom hole 50b are determined based on each side of the original plate 51, that is, both side sides 51a, plate bottom side 51b, and plate head side 51c.

On the other hand, a printing pattern 53 and register marks 54 are drawn on the original film 52 shown in FIG. Further, with this registration mark 54 as a reference, a positioning hole 55 corresponding to the printing head hole 50d is formed at the printing printing head position of the original film 52. In this case, the center positioning hole 55 is set to be a perfect circle with the same dimensions as the plate head hole 50d, and the positioning holes 55 at both ends are elongated holes whose long axes are set in the left-right direction in consideration of thermal expansion of the original film 52. to form.

Next, the positioning hole 55 and the head hole 50 are opened.
The original film 52 is superimposed on the original plate 51 through a positioning pin (not shown) in d, and with the plate positioned in this way, an exposure process (e in the same figure) is performed to print the printed pattern 53 on the original plate 51.
Burn it into place on the top. Once the printing is completed, a phenomenon treatment (f in the same figure) is subsequently performed to complete the plate 50 as a final product.

(5) Plate loading/unloading operation Next, the plate loading/unloading operation during plate replacement will be explained. FIG. 31 shows the microprocessor 21 (the second one) when a plate change command is given by the operator pressing, for example, the plate change key on the operation panel 25 (FIG. 2).
2 is a flowchart showing the operation of FIG.

When a plate exchange command is given, step S3
At 0, it is determined whether or not a command can be accepted. If the command is not accepted,
When the operation is completed and the request can be accepted, the process advances to the next step S31.

In step S31, the set state of the plates on the plate supply/discharge trays 9 and 10 is determined.
In this case, the plates are specifically set as follows. That is, in FIG. 6, the plate head 50d of the plate 50 to be newly printed (hereinafter referred to as a new plate) is slightly inserted between the plate feed drive roller 510 and the plate feed auxiliary drive roller 520 (at this point, the plate head 50d is inserted between the plate feed drive roller 510 and the plate feed auxiliary drive roller 520).
0 is far from roller 510), new version 5
0 along the both side positioning members 904 of the plate supply/discharge tray 9 (or 10) shown in FIG. Position it along the material 903. Further, the judgment as to whether or not the new plate 50 is set is made by a plate presence detection sensor 544 attached to the plate supply/discharge unit 5 (or 6) shown in FIG.
Do this using

In this way, the setting state of the new plate 50 is determined in step S31, and if the new plate 50 is set on both the plate supply/discharge trays 9 and 10 (that is, in the case of two-color printing), the inking unit is set in step S32. After confirming that both numbers 7 and 8 are set, the process proceeds to step S33, where the hand type is set to, for example, "3" and stored in the memory. Also, in step S31,
If the new plate 50 is set only in the upper plate supply/discharge tray 9 (in other words, in the case of one-color printing), after confirming that the upper inking unit 7 is set in step S34, the process proceeds to step S34. Proceeding to S35, the hand type is set to, for example, a state of "1" and stored in the memory. Furthermore, step S3
In step S36, if the new plate 50 is set only on the lower plate supply/discharge tray 10 (that is, in the case of one-color printing), it is confirmed in step S36 that the lower inking unit 8 is set. After, step S
Step 37 sets the hand type to the state "2", for example, and stores it in the memory. Furthermore, in step S31, if the new plate 50 is not set on any of the plate supply and discharge trays 9 and 10 (that is, in the case of plate discharge operation)
If so, the process proceeds to step S38, where the hand type is set to, for example, a state of "0" and stored in the memory. Note that the above steps S32 and S3
4. In S36, if the predetermined inking unit 7 or 8 is not installed, the process proceeds to step S39, where an error is displayed, and then the operation is terminated.

In this way, steps S33, S35, S3
7. In S38, when the setting of the hand type is completed, the process proceeds to step S40, where mechanical initialization is performed. As a result, the plate cylinders 3, 4 and the impression cylinder 11 are separated from the blanket cylinder 2, and the inking units 7, 8 are set at a position where they are separated from the plate cylinders 3, 4.

Next, in step S40, the low-speed motor is turned on and the high-speed motor is turned off, and the ink forming rollers of the blanket cylinder 2, impression cylinder 11, plate cylinders 3 and 4, and inking units 7 and 8 are operated during steady printing. It starts rotating at a slower speed.

Thereafter, in step S42, the state of the hand type stored in the memory is determined. That is, when it is determined that the hand type is "3" (in the case of upper and lower plate feeding), the process advances to step S43, where plate feeding and discharging processing is performed on both plate cylinders 3 and 4. Also, if the Han type is determined to be "1" (in the case of upper salary version)
In step S44, plate feeding and discharging processing is performed on the plate cylinder 3 side, and only plate discharging processing is performed on the plate cylinder 4 side. Similarly, if the hand type is determined to be "2" (in the case of a sub-fed plate), the process proceeds to step S45, where plate feeding and discharging processing is performed on the plate cylinder 4 side, and plate discharging processing is performed on the plate cylinder 3 side. Only processing takes place. Further, if the hand type is determined to be "0" (in the case of only plate discharge), the process advances to step S46, and only plate discharge processing is performed on both plate cylinders 3 and 4. The difference between the plate feeding and discharging process and the plate discharging process in this case is that the plate feeding drive roller 510 shown in FIG.
The only difference is whether or not the plate feeding auxiliary drive roller 520 is rotationally driven by the pulse motor 509 (FIG. 3d). That is, when performing the plate supply/discharge process, the pulse motor 509 is driven at a predetermined timing for a predetermined time to advance the plate, and when only the plate discharge process is performed, the pulse motor 509 is not driven at all (that is, the plate is not fed). .

After completing the predetermined plate feeding and discharging processes in steps S43 to S46, the process proceeds to step S47, where the low-speed motor is turned off and the high-speed motor is turned on, and the blanket cylinder 2, impression cylinder 11, plate cylinders 3 and 4, and plate cylinders 3 and 4 are moved. The ink forming rollers of the king units 7 and 8 are switched from low speed rotation to high speed rotation. In this way, the series of plate exchange processing is completed.

The above is the operation of the microprocessor 21 (Fig. 2) when a plate exchange command is given.
This will be explained using the time chart shown in FIG. However, in this case, a new plate 50 is set on the plate feeding stage 901 of the plate supply/discharge tray 9, and a printed plate 50' (hereinafter referred to as the old plate) is wrapped around the plate cylinder 3 side (in other words, the plate cylinder The case where the plate feeding/discharging operation is performed on the third side will be explained as an example. In other cases, the predetermined plate feeding and discharging operations are performed based on the same principle as described above, and the explanation thereof will be omitted.

First, when a plate exchange command is given and the plate cylinder 3 starts rotating, the plate supply/discharge drive roller 511 shown in FIG. 7, which is connected to the plate cylinder gear 301 through a gear mechanism, rotates counterclockwise in the figure. Start rotating at a constant speed. This plate discharge drive roller 511
continues to rotate during the period when the plate supply/discharge operation is performed.

Then, at time _t1 , when the rotational position of the plate cylinder 3 reaches a predetermined position, the solenoid 150 is turned on and the set lever 153 rotates to the left about the shaft 151, as shown in FIG.
The plate feeding and discharging cam 157 and the plate discharging cam 163 (Fig. 12) rotate to the left, and the lock lever 159
Locked by

Then, when time t ₂ is reached, the solenoid 150 is turned off, but the supply/discharge plate cam 157 is turned off.
(Fig. 10) continues to be locked by the lock lever 159, so the supply/discharge plate cam 157
And the plate discharge cam 163 (FIG. 12) is held at the above rotational position.

When the plate cylinder ₃ further rotates and reaches time t3, the roller 341 of the link 338 rides on the plate supply/discharge cam 157, and the link 338 rotates clockwise around the shaft 339, as shown in FIG. 342, the link 334 is pushed out in the direction of the outer circumference of the plate cylinder, and the lock of the plate head gripping vise mechanism is released. As a result, the claw shaft 31
1 can be rotated to the left.

When time _t4 is reached, solenoid 146 shown in FIG. 6 is turned on. When the solenoid 146 is turned on, the drive lever 140 engages the drive shaft 142.
The operating lever 521 rotates to the left about the drive shaft 518 as a fulcrum, and the plate feeding auxiliary drive roller 520 is pressed against the plate feeding drive roller 510. As a result, both rollers 510,
520, the beginning of the new edition 50 is nipped. On the other hand, solenoid 1 shown in FIG.
37 turns on. When this solenoid 137 is turned on, the drive lever 131 is moved to the drive shaft 133.
The actuating lever 541 rotates to the left about the rotating shaft 538 as a fulcrum, and the plate discharge pressing roller 539 is set in a position where it comes into pressure contact with the plate cylinder 3. This "applying" operation of the discharge plate pressing roller 539 is performed when the discharge plate pressing roller 539 is located at the opening 307 of the plate cylinder 3. Further, when the solenoid 137 is turned on, the link 165 and shaft 164 shown in FIG.
is set in the position shown in FIG.

When time _t5 is reached, the roller 320 of the link 322 shown in FIG.
7, the link 321 rotates to the left together with the pawl shaft 311, and the plate head gripping pawl 312 is opened, as shown in FIGS. 14b and 14c. Further, due to the left rotation of the pawl shaft 311, the link 355 shown in FIG. 18 is rotated to the left as shown in FIG.
56 is set.

Then, when time _t6 is reached, the plate discharge presser roller 539 passes through the opening 307 and rides on the plate cylinder 3, as shown in FIG. 12b.
As a result, the plate head 50a' of the old plate 50' wound around the plate cylinder 3 is moved to the plate discharge presser roller 539.
and is nipped by the plate cylinder 3. On the other hand,
As shown in FIG. 12a, the cam follower 35
0 rides on the plate discharge cam 163, and as the plate cylinder 3 rotates, the plate head push-out claw 344a moves "out" as shown in FIG. (time t ₇ ). As a result, the old version 5
The 0' printing head grip is released. When time _t8 is reached, as shown in FIG. 14a, the cam follower 350 moves to the second cam surface 163b of the plate ejecting cam 163, and the plate ejecting claw 344a enters and returns to its original position. . On the other hand, the plate head 50a' of the old plate 50' is connected to the plate discharge guide 517 and the plate discharge drive roller 5, as shown in FIG.
Sent out between 11 and 11. In this way, old version 5
After the plate head 50a' of 0' passes between the plate discharge guide 517 and the plate discharge drive roller 511, it is sent to the plate discharge table 902 of the plate supply/discharge tray 9 by the plate discharge drive roller 511 shown in FIG.

When time _t9 is reached, as shown in FIG. 18(d), the plate feeding presser actuating roller 530 of the plate feeding/discharging unit 5 rides on the plate feeding presser roller cam 356, and the plate feeding presser roller 52 shown in FIG. 19(a) rides on the plate feeding presser roller cam 356.
5 is set at the plate holding position (this "applying" operation is performed when the plate feeding holding roller 525 is located at the opening 307 of the plate cylinder 3), and at the same time, the ratchet 534 shown in FIG. The plate feeding press roller 525 is held (locked) at the plate press position by engaging with the valley portion 529a of the plate presser roller 525.

Thereafter, when time _t10 is reached, the pulse motor 509 (FIG. 3d) provided in the plate feeding/discharging unit 5 causes the plate feeding drive roller 510 and the plate feeding auxiliary drive roller 52 to move as shown in FIG.
0 is rotationally driven, and both rollers 510, 520
The new plate 50 nipped in the plate is started to feed, and the plate head 50a is inserted into the plate insertion space 36 between the plate head gripping claw 312 and the plate head positioning pin 315.
Sent out on 8th. In this way, the printing head 50a is
When the plate is fed to a predetermined position within the plate insertion space 368, the link 322 is opened as shown in FIG.
The roller 320 reaches the concave portion 157c of the plate supply/discharge cam 157, the plate head gripping claw 312 begins to close (time _t11 ), and after the positioning pin 315 is inserted into the pin hole provided in the plate head 50a, the plate The plate head 50a is held in pressure contact with the plate cylinder 3 by the head gripping claw 312 (time t ₁₂ ).

While the printing process is carried out in this way,
As shown in FIG. 18, as the pawl shaft 311 rotates, the plate feeding presser roller cam 356 returns from the set state shown in FIG. 18 d to the reset state shown in FIG. 18 c.

Then, immediately after adding the head of the block, the first
As shown in FIG. 9a, the plate feeding press roller 525
passes through the opening 307 of the plate cylinder 3 and rides on the plate cylinder 3, and the pressing of the new plate 50 onto the plate cylinder 3 is started.

Thereafter, at time _t13 , the pulse motor 509 is turned off, and both rollers 510, 520
The sending out of the new version 50 according to FIG. 6 is stopped. Thereafter, as shown in FIG. 6, the new plate 50 is pulled out from the feed/discharge table 901 by the rotational force of the plate cylinder 3 while being nipped by both rollers 510, 520,
The plate is wound around the plate cylinder 3 while being pressed against the plate cylinder 3 by the plate 25 to prevent the plate from sagging. At that time, both rollers 510, 520
Immediately after plate feeding is stopped as shown in FIG. 6, the presence or absence of driven rotation of both rollers 510, 520 is detected by the detection means. As the detection means, for example, a pulse motor 509 is used.
encoder is used, and based on instructions from the microprocessor 21 shown in FIG.
Immediately after the pulse motor 509 is turned off, the rollers 510, 52 are checked to see if a predetermined number of pulses are output from the encoder within a predetermined time period.
The presence or absence of the zero driven rotation is detected. and,
When the driven rotation is detected, that is, when the plate head 50a is held by the plate head gripper 312, the microprocessor 21
Based on the command from (FIG. 2), the plate feeding and discharging operation continues. On the other hand, when the driven rotation is not detected, that is, when the plate head gripping claw 312 makes a mistake in gripping the plate head, the machine motor 20 (Fig. 1) is activated in an emergency manner based on a command from the microprocessor 21. Stop and end the plate feeding/discharging operation midway.

When the plate feeding/discharging operation continues, immediately after time _t13 , the lock lever 159 shown in FIG. ) is unlocked.

Then, when time _t14 is reached, the plate head clamping vise mechanism is locked. That is, the 16th
As shown in the figure, the plate head gripping claw lock cam 16
The roller 329 of the link 327 is pressed against the link 327, and the link 327 rotates clockwise about the shaft 328 as shown in FIG. As a result, the link 331 rotates clockwise around the shaft 332, and the pin 333 passes the top dead center, and the shaft 332 and pin 33
The plate cylinder 3 is self-locked at a position moved inward of the plate cylinder 3 by a slight distance from the straight line connecting the plate cylinders 5 and 5.
In this self-locked state, the link 32
1 is strongly rotated to the right together with the pawl shaft 311, and a strong pressing force is applied to the plate head gripping pawl 312, so that the plate head 50a is firmly pressed and held.

When the time t ₁₅ is reached, the grip of the plate end of the old plate 50' is released. That is, the link 35 is connected to the plate bottom reset cam 166 shown in FIG.
9 roller 361 rides on the link 35
9 rotates to the left around the axis 360, and the link 36
4 is rotated clockwise around shaft 365 by the biasing force of spring 367, and locks link 359 in its counterclockwise rotation position. As the link 359 rotates to the left, the link 319 shown in FIG.
16, the plate bottom hook 317 also rotates clockwise, and the plate bottom hook 317 is removed from the plate bottom hole 50b' of the old plate 50', and the plate bottom grip of the old plate 50' is released.

In this way, the time _t16 is reached, and the plate tail 50d' of the old plate 50' shown in FIG.
9, the solenoid 137 is turned off. By turning off the solenoid 137, the drive lever 131 rotates to the left about the drive shaft 133, and the operating lever 541 rotates to the right about the rotation shaft 538 due to the biasing force of the return spring, so that the plate discharge presser roller 539 move away from Thereafter, the old plate 50' is moved to the plate discharge drive roller 511.
The old plate 50' is fed and stored in the plate discharging table 902, and the plate discharging operation of the old plate 50' is completed.
On the other hand, by turning off the solenoid 137,
Link 165 and shaft 164 shown in FIG.
is rotated clockwise under the tension of the spring 169, and the plate bottom foot reset cam 166 is also rotated clockwise and returned to the reset position.

Thereafter, at time _t17 , the plate tail of the new plate 50 is grabbed. That is, as shown in FIG. 25a, when the plate feeding press roller 525 passes the outer periphery of the plate cylinder 3, it enters the opening 307 due to the biasing force of the spring 527 (FIG. 19), and at this time, the new plate 50 The plate end 50c is plate cylinder 3
Push it within the circumference of. On the other hand, in synchronization with the timing of the above-mentioned pushing, the plate bottom foot set cam 171 shown in FIG. 23 engages with the roller 366 of the link 364. This engagement causes the link 364 to rotate counterclockwise about the shaft 365, unlocking the link 359, and
9 rotates clockwise around the shaft 360 due to the tensile force of the spring 363. When the link 359 rotates clockwise, the link 319 and pin 3 shown in FIG.
62 , the link 319 is released from the torsion coil spring 318 together with the hook shaft 316 .
It rotates to the left with the urging force of , and the plate end hook 317
also rotates to the left. Above version butt set cam 1
The operation from engagement of the plate bottom hook 317 to counterclockwise rotation of the plate bottom hook 317 is performed in an instant, and as a result, the plate bottom hook 317 is aligned with the plate bottom hole 50 of the new plate 50.
b, and the plate bottom 50c is tensilely biased in a direction substantially tangential to the outer circumferential surface of the plate cylinder, thereby gripping the plate bottom.

Immediately after the new plate 50 is wound around the plate cylinder 3, at time _t18 , the plate feeding press roller 525 is raised. That is, as shown in FIG.
The tip of the trough 52 of the ratchet foil 529
9a, the rotating shaft 524 rotates clockwise under the tension of the spring 532 shown in FIG.
The plate feeding press roller 525 is moved away from the plate cylinder 3.

Thereafter, when time _t19 is reached, the solenoid 146 shown in FIG. 6 is turned off. As a result, the biasing force of the spring 144 causes the drive lever 140 to
rotates clockwise around the drive shaft 142, and the operating lever 521 returns to the drive shaft 518 with the biasing force of the spring.
Rotate counterclockwise around the plate feeding auxiliary drive roller 5.
20 is separated from the plate feeding drive roller 510. As a result, all plate feeding operations for the new plate 50 are completed.

In this way, while the plate cylinder 3 rotates approximately once,
Since plate feeding and plate discharging are performed in parallel,
It is possible to shorten plate exchange time and prevent double feeding of plates.

(6) Effects of the above-mentioned plate mounting method As explained using FIG. That is, both sides 51a, the plate bottom side 51b, and the plate head side 51c are defined as standards.
Then, the plate 50 is set at a predetermined position on the plate supply/discharge tray 9 with the both side sides 51a and the plate bottom side 51b as references, and is moved a predetermined amount toward the plate cylinder 3 by the plate supply/discharge unit 5 while being related to the rotation of the plate cylinder 3. By feeding out the printing plate 50 by the same amount, the printing head hole (positioning hole) 50d is engaged with the positioning pin 315 (FIG. 7) provided on the printing cylinder 3, and the printing plate 50 is mounted on the printing cylinder 3.

In this way, the plate head hole 50d is formed using each side of the plate 50 as a reference, and the plate 50 is fed by a predetermined amount toward the plate cylinder side using each side as a reference to perform plate mounting. It can be mounted at a predetermined position on the plate cylinder 3 with high accuracy.

Note that the position of the plate head hole 50d does not necessarily need to be determined using all sides of the plate 50 as a reference; in short, at least two sides of the plate 50 that intersect
Sides, for example, one side 51a and the bottom side 51
b, or one side 51a and the printing head side 51c
This can be done based on. In that case,
The plate 50 is fed out by the plate feeding mechanism (that is, the plate feeding/discharging unit 5) with reference to the two sides of the above-mentioned reference.

(7) Functions of the printing head gripping vise mechanism and vise release mechanism The configuration and operation of the printing head gripping vise mechanism and vise release mechanism are the same as those of the above-mentioned “printing head gripping vise mechanism and vise release mechanism.” This is as explained in the column ``(5) Plate feeding/discharging operation'' (see Fig. 28). To summarize, as the plate cylinder 3 rotates, first at time _t1 , the plate supply/discharge cam 15
7 is locked, and then, at time _t3 , the roller 341 of the link 338 rides on the feeding/discharging plate cam 157, and the vise mechanism is unlocked (FIG. 16). Thereafter, at time t ₅ , the roller 320 of the link 322 rides on the plate supply/discharge cam 157 and the plate head gripping pawl 312 opens (FIG. 11), and at time t ₁₂ the roller 320 moves onto the recess 157 of the plate supply/discharge cam 157 .
When reaching c, the plate head gripping claw 312 releases the spring 32.
It closes with a biasing force of 6, and grips the plate head (Fig. 16). Then, at time _t13 , the lock lever 1 is moved by the roller 320.
59 is kicked up and the plate supply/discharge cam 157 is unlocked, and immediately after that, at time _t14 , the roller 329 of the link 327 rides on the plate head gripper lock cam 162, and the vise mechanism is locked (Fig. 17). ). This results in
A strong pressing force is continuously applied to the plate head gripping claw 312.

In this way, immediately after the printing plate head is gripped, in addition to the urging force of the spring 326 (Fig. 11b), a pressing force by the vise mechanism is applied to the printing plate head gripping pawl 312, so that the printing plate head is firmly held. This ensures that the plate does not fall off during printing. Furthermore, the vise mechanism is automatically locked and released as the plate cylinder 3 rotates.

(8) Function of plate end gripping mechanism Figures 25 to 26 and Figure 27a
As shown in FIG. 2, the plate bottom grip is carried out by hooking the plate bottom hook 317 disposed in the opening 307 of the plate cylinder 3 into the plate bottom hole 50b of the plate 50 wrapped around the outer periphery of the plate cylinder 3. This is done by applying tension in a substantially tangential direction to the outer peripheral surface of the plate cylinder. In this way, instead of bending and holding the plate bottom 50c against the opening end face of the plate cylinder 3,
Since the plate bottom 50c is held by tensile force in a direction substantially tangential to the outer peripheral surface of the plate cylinder, the plate bottom hook 317 holds the plate bottom 50c even when using a highly rigid plate whose base is made of polyester film, aluminum, steel, etc. The plate bottom 50c can be held securely.

(9) Function of plate gripping and plate misalignment detection mechanism As shown in FIG. 9b and FIGS. 27b to 27d, the mark member 3
A plate gripping and plate misalignment detection mechanism consisting of a photoelectric sensor 75 and a photoelectric sensor 376 is provided. According to this detection mechanism, as shown in FIG. 27b, when the plate bottom 50c is normally held by the plate bottom hook 317, the mark member 375 is not detected by the photoelectric sensor 376, and , d, the mark member 375 is detected by the photoelectric sensor 376 only when a plate misalignment occurs or when the edge of the plate is not grasped. It is also possible to automatically detect plate wrapping errors such as plate gripping errors.

Note that the detection mechanism is not limited to the above configuration, and may be of any configuration as long as it detects plate misalignment and plate grip based on the rotational position of the plate bottom hook 317. .

By the way, the above-mentioned detection mechanism can also be used as a plate presence detection sensor that detects whether or not the plate 50 is wound on the plate cylinder 3. That is, the rotational position of the plate bottom hook 317 is the second position when the plate 50 is wound on the plate cylinder 3.
It is in the state shown in Fig. 7b, and when the plate 50 is not wound, it is in the state shown in Fig. 7d. From this, in the same way as in the above case, the photoelectric sensor 3
76 makes it possible to detect the presence or absence of a plate on the plate cylinder 3 by detecting the mark member 375. In this case, when the mark member 375 is detected, in other words, when the absence of a plate is detected, based on a command from the microprocessor 21, the plate discharge presser roller 539 (see FIG. ) is controlled so as not to perform the attaching operation. With this control, the plate discharge presser roller 539
0 can be prevented from coming into contact with the unwound plate cylinder 3, that is, the plate cylinder 3 can be prevented from being stained by ink adhering to the discharge plate pressing roller 539.

(10) Operation when the plate head is gripped incorrectly In the above printing machine, the plate feed roller 51
0,520 (FIG. 6) is stopped, both rollers 510,5
The presence or absence of the driven rotation of the plate head gripping claw 312 is detected by a detection means composed of an encoder or the like, and when the driven rotation is not detected, that is, when a mistake in gripping the plate head by the plate head gripping claw 312 has occurred, the machine motor 20 ( (Fig. 1) is brought to an emergency stop, and the plate feeding/discharging operation is controlled to be terminated midway. Therefore, in a state where a mistake in wrapping the plate has occurred, the ink form roller is directly attached to the plate cylinder.
Ink builds up on the plate cylinder 3, staining it with ink, or the plate 50 gets caught in the printing machine, causing damage to the plate or malfunction of the printing machine.
Various inconveniences caused by mistakes in wrapping the plate can be prevented.

(11) Action of the rounded part of the plate cylinder As shown in Figure 29, in the plate cylinder 3,
The corner portions of the plate head pressure contact surface 369 and the outer circumferential surface of the plate cylinder 372, and the corner portions of the plate bottom side opening end surface 373 and the outer circumferential surface of the plate cylinder 372 are each rounded. As a result of this configuration,
Even when using a highly rigid plate whose base is made of polyester film, aluminum, steel, etc., the plate can be fitted and wrapped around the plate cylinder 3 without shifting its position.
That is, on the plate head side, the plate head 50a is brought into contact with the plate head pressing surface 369 by the plate head gripping claw 312.
After being held in pressure contact with the plate feeding press roller 525
(FIG. 6), when the plate 50 is pressed down and wrapped around the outer circumferential surface 372 of the plate cylinder, the plate 50 is smoothly curved along the radius curved surface, fitted, and wrapped. Also, on the plate bottom side, when the plate bottom 50c is held by the plate bottom hook 317 so as to be tensilely biased toward the inside of the plate cylinder opening, the plate 50 is fitted along the curved surface on the plate bottom side. Can be wrapped around. In this way, the plate 50 can be accurately wound around the predetermined position of the plate cylinder 3 without being displaced, and since the plate 50 does not rise from the outer peripheral surface of the plate cylinder, staining of the plate surface due to contact with the ink forming roller can be avoided.

(12) Setting the circumferential speed of the plate cylinder and blanket cylinder FIG. 32 shows the relationship among the plate cylinder 3, blanket cylinder 2, and inking roller 710 during regular printing operation. As shown in the figure,
In steady printing, the plate cylinder 3 is mounted on the blanket cylinder 2, the ink form roller 710 is mounted on the plate cylinder 3, and the blanket cylinder 2, plate cylinder 3, and ink form roller 710 are moved in the direction of the arrow in the figure. This is done by being rotationally driven.
The blanket cylinder 2, the plate cylinder 3, and the inking roller 710 are connected by gears disposed so as to mesh with each other at one end thereof, and are rotationally driven by a main motor. And the respective diameters D ₁ , D ₂ ,
The dimension D ₃ is determined so that the peripheral speeds of the blanket cylinder 2 and the inking roller 710 are slightly faster than the peripheral speed of the plate cylinder 3. In this case, since the blanket cylinder 2 and the inking roller 710 are made of an elastic material such as rubber, the dimensions of the diameters D ₁ , D ₂ , and D ₃ are determined in consideration of what is called a tow roll. That is, if we consider tow roll, for example, if D ₂ is set to 153.35mm, then D ₁
is about 152.9mm and _D3 is about 60.3mm, so the circumferential speed of each cylinder is almost equal. Therefore, in this example,
For D ₂ of 153.35mm, D ₁ is 153.2mm and D ₃ is
The size is set to 60.5 mm, which is slightly larger than the above-mentioned size, so that the circumferential speed of the ink form roller 710 and the blanket cylinder 2 is slightly larger than the circumferential speed of the plate cylinder 3. The above diameters D ₁ , D ₂ ,
The dimensions of D ₃ are a preferred example.
Of course, you are free to use other dimensions.

As a result of this configuration, as the plate cylinder 3 rotates, when the blanket cylinder 2 and the ink forming roller 710 ride up from the plate cylinder opening 307 to the outer periphery of the plate cylinder, a pulling force acts on the plate 50, and the plate Even if the head 50a is pulled out to some extent from the plate head gripping claw 312, when the blanket cylinder 2 and the inking roller 710 roll around the outer circumference of the plate cylinder 3, the plate 50 is pushed toward the plate head 50a. The returning force acts to push the plate 50 back to its original position, so even if printing continues for a long time, the plate head 50a will not hold the plate head gripping claw 3.
It will never fall out of 12. In addition, since the plate bottom 50c is elastically held in tension by the plate bottom hook 317 by the biasing force of the spring, the displacement of the plate 50 due to the pulling force and pushing back force can be absorbed by the spring force. There is no problem in holding the print edge.

(Effects of the Invention) As described above, according to the plate head gripping device of the present invention, the activation and release of the vise mechanism that applies a strong plate pressing force to the plate head gripping member during the plate feeding/discharging operation can be performed easily. Since this is done automatically as the cylinder rotates, it is possible to reliably prevent plates from falling off while enabling automatic plate feeding and discharging.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of a printing press that is an embodiment of the present invention, Fig. 2 is a schematic diagram showing a control system used in the printing press, Fig. 3 is a configuration diagram of a plate supply/discharge unit, and Fig. 4 is an explanatory diagram of the plate feeding and discharging plate pressing roller locking mechanism, FIG. 5 is a diagram showing how the plate feeding and discharging unit is attached to the printing press main body, FIG. 6 is an explanatory diagram of the plate feeding operation, FIG. 7 is an explanatory diagram of the plate discharging operation, and FIG. The figure is a configuration diagram of the plate supply/discharge tray, Figure 9a is a view of the plate cylinder seen from the back side of the printing press body, Figure 9b is a partially enlarged view, and Figures 10 and 11 are the plate head gripper. Figures 12 to 14 are illustrations of the opening and closing operations of the plate head pushing claw, Figures 15 to 17 are illustrations of the operation of the plate head gripping vise mechanism, and Figure 18 is an illustration of the plate feeding holder. FIG. 19 is an explanatory diagram of the locking operation of the plate feeding press roller. FIG. 20 is an explanatory diagram of the unlocking operation of the plate feeding press roller. FIG. 21 is an explanatory diagram of the operation of the plate bottom foot set cam mechanism. 2
Figures 2 to 26 and Figure 27a are explanatory diagrams of the operation of the plate tail hook operating mechanism, Figures 27b, c, and d are explanatory diagrams of the operation of the plate shift and plate grip detection mechanism, and Figure 28 is the plate feeding and discharging operation. Figure 29 is a cross-sectional view of the plate cylinder, Figure 30 is a diagram showing the plate manufacturing process, and Figure 31 is a flow chart showing the operation of the microprocessor when a plate change command is given. , Figure 32 shows the plate cylinder during steady printing operation,
FIG. 3 is a schematic diagram showing the relationship between a blanket cylinder and an ink forming roller. 3... Plate cylinder, 150... Solenoid, 152, 32
1,322,327,331,334,338...
Link, 153... Set lever, 157... Plate supply/discharge cam, 159... Lock lever, 162... Plate head gripper lock cam, 336... Stopper.

Claims (1)

[Scope of Claims] 1. A plate head gripping member that rotates forward and backward around a rotating shaft attached to the plate cylinder to hold and release the plate head in pressure contact with the plate cylinder; means for rotationally urging the plate head gripping member against the urging force of the means for rotationally urging the plate head gripping member within the range from the first rotational position to the second rotational position of the plate cylinder during the plate feeding/discharging operation; a plate head gripping member actuating mechanism for rotationally operating the plate head gripping member in a direction to release the plate pressure contact; and when the plate cylinder passes through the second rotational position, the plate head is held by the plate head gripping member by the urging force of the rotational urging means. a vise mechanism that further applies a rotational force in the plate pressure contact direction to the plate head gripping member after the plate head gripping member is held in pressure contact; and a vice mechanism that applies rotational force in the plate pressure contact direction to the plate head gripping member before the plate cylinder enters the first rotation position A plate head gripping device equipped with a vise release mechanism that releases rotational force application.