JPH04323039A - Printing apparatus - Google Patents

Abstract

PURPOSE:To provide a printing apparatus capable of setting predetermined printing pressure even when the thickness of an object to be printed is changed. CONSTITUTION:A printing apparatus has a plate cylinder 75 provided with a plate, the blanket cylinder sliding with the plate cylinder 75 to apply printing to an object to be printed and a blanket shaking lever 80 shaking the blanket cylinder 77 so as to bring the same to the state separated from and coming into contact with the object to be printed. The blanket cylinder 77 is brought into contact with the object to be printed by the blanket shaking lever 80 to transfer ink to the blanket cylinder 77 from the plate of the plate cylinder 75 and, further, printing is applied to the object to be printed from the blanket cylinder 77. In this printing apparatus, a printing pressure adjusting screw 82a stopping the blanket shaking lever 80 revolved toward the object to be printed at an arbitrary position is provided.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus that can adjust printing pressure depending on the thickness of printed matter.

0002

[Prior Art] As a conventional device of this kind, there is a
There is one as described in Japanese Patent No. 299848. This includes a plate cylinder on which a plate is installed, a blanket cylinder that comes into contact with the printed matter to perform printing, and a blanket swing lever that swings the blanket cylinder.The blanket swing lever is rotated. The blanket cylinder is brought into contact with the printed material under a predetermined pressure, ink is transferred from the plate of the plate cylinder to the blanket cylinder, and further, the printed material is printed from the blanket cylinder.

0003

[Problems to be Solved by the Invention] However, in such conventional printing apparatuses, printing on printed matter is accomplished by rotating the blanket swinging lever and bringing the blanket cylinder into contact with the printed matter with a predetermined pressure. Therefore, if the amount of rotation of the blanket swinging lever is the same, if the thickness of the printed material differs, the pressing force against the printed material will change, making it impossible to perform good printing. There is.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a printing device that can set a predetermined printing pressure even if the thickness of printed matter changes.

[0005]

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned conventional problems, and includes a plate cylinder provided with a plate, a blanket cylinder that slides on the plate cylinder and prints on printed matter. and a blanket swinging lever that swings the blanket cylinder toward and away from the printed material, and the blanket swinging lever brings the blanket cylinder into contact with the printed material, so that the blanket cylinder is moved from the plate of the plate cylinder to the blanket cylinder. In a printing device that transfers ink and further prints on a printed matter from the blanket cylinder, the printing device is provided with a stopping means for stopping the blanket swinging lever rotated toward the printed matter at an arbitrary position. It is a feature.

[0006]

[Operation] According to this means, first, by rotating the blanket cylinder and the plate cylinder, ink is transferred from the plate of this plate cylinder to the blanket cylinder, and the blanket cylinder is moved to the printed matter side via the blanket swing lever. rock it,
The blanket cylinder is brought into contact with the printed material with a predetermined pressing force and the blanket cylinder is rolled over the printed material, thereby printing on the printed material from the blanket cylinder.

In this case, the blanket cylinder is swung toward the printed matter by the blanket swing lever, and the pressing force of the blanket cylinder against the printed material is determined by the swing angle of the blanket swing lever toward the printed material. Ru. Therefore,
When the thickness of the printed matter changes, the stop means stops the blanket swinging lever at an arbitrary position depending on the thickness, so that high-precision printing can be achieved even if the thickness of the printed matter changes. It will be carried out.

[0008]

EXAMPLES The present invention will be explained below based on examples.

FIGS. 1 to 12 are diagrams showing an embodiment of the present invention.

First, to explain the configuration, reference numeral 10 in FIG.
is a rotating disk exhibiting a dodecagonal shape, and this rotating disk 10 is:
A drive device 30 allows rotation in 30° increments and supports vertical movement.

[0011] Around this rotary disk 10, there are a printed matter supply device 50 and first to fourth printing units 70, 71, 7.
2, 73, and a drying device 90 are arranged in this order.

Structure of the drive device 30 The drive device 30 is mainly structured as shown in FIG. That is, the hollow shaft 31 that supports the rotary disk 10
However, a pair of upper and lower bearings 33 and 34 provided on the base 32
A spline 31a is provided at the lower end of the shaft 31, and a spline shaft 36 extending upward from the index 35 is inserted into the spline 31a so as to be slidable up and down. has been done.

The spline shaft 36 of this index 35
The rotary disk 10 is rotated by 30 degrees as a result of the rotation.

The mechanism for moving the rotary disk 10 up and down is as follows. First, on the side of this shaft 31, as shown in FIG.
A cam member 38 for rotating the swing lever 37 is rotatably arranged below the swing lever 37. The cam member 38
is connected to the index 35 via a chain 39 so as to be rotated. This swing lever 3
7 is inserted into a groove 40a of a fixing member 40 fixed to the shaft 31. Further, a tension spring (not shown) is disposed between the swing lever 37 and the base 32 to keep the cam member 38 in constant contact with the roller 37c of the swing lever 37. The cam member 38 is divided into three parts at approximately 120° intervals, and has a rising part 38a for raising the rotary disc 10, a stopping part 38b for stopping the rotary disc 10 for a predetermined time in the raised position, and a descending part 38c for lowering the rotary disc 10. .

Further, on the upper surface of the base 32, a plurality of fixed locating pins 42 .
2 is fixed to a base 32, and can be removed from the rotary disk 10 when the rotary disk 10 is in the raised position. Also,
The vertically movable locating pin 43 is arranged to be vertically movable, and the vertically movable locating pin 43 is raised by the index 35 and inserted into the through hole 10d of the rotary disc 10 immediately before the rotary plate 10 descends from the raised position. It has become.

Structure of the rotary disk 10 As shown in the plan view of FIG. 2, the rotary disk 10 is formed into a dodecagonal shape, and every other side surface has a suction surface 10b on which a compact disc P is attached. At the same time, there is a compact disc P on the suction surface 10b inside.
A suction device 11 is provided to adsorb the. In addition, Figure 3
4 shows when the rotary disk 10 is at its highest position (the position shown by the two-dot chain line in FIG. 1) and about to descend, and FIG. This is a cross-section of the location.

As shown in FIG. 5 showing the suction surface 10b, this suction device 11 has a total of six suction cups 12 disposed on the circumference for suctioning the compact disc P, and these suction cups 1
The following mechanism for applying or releasing an attractive force to 2 is provided.

That is, as shown mainly in FIGS. 3 and 4, a recess 10c with an open suction surface 10b side is formed in the center of the plurality of suction cups 12, and a stop ring 13 is inserted into this recess 10c. is fixed, and a fixing plate 14 is disposed on this stop ring 13. From this fixing plate 14, the first chamber 15 on the left side (inlet side) in FIG. 3 and the second chamber 15 on the right side (back side) in FIG. A chamber 16 is defined.

A pressing member 17 is provided in the first chamber 15, and
Slide members 18 are arranged in the second chamber 16 so as to be slidable in the horizontal direction, and first and second springs 19,
20 in the direction of protruding from the suction surface 10b (to the left in FIG. 3). A pressing pin 17a is formed on the pressing member 17, and the sliding member 18 is pressed by this pressing pin 17a when the pressing member 17 is slid in the recessed direction from the suction surface 10b. A negative pressure chamber 21 is formed by the slide member 18 and the like, and a communication path 18a that is continuous with the negative pressure chamber 21 is formed in the slide member 18. Further, this communication path 18a is connected to a suction cup passage 12a that connects to the suction cup 12 when the slide member 18 is slid to the back of the recess 10c against the biasing force of the second spring 20 (in the state shown in FIG. 3). and the pipe 22 to communicate with each other.

This pipe 22 communicates with the atmosphere or the hollow interior of the shaft 31 via a vertically movable member 23. That is, the vertically movable member 23 is disposed so as to be vertically movable while being urged downward by the lowering spring 24, and is connected to the atmosphere opening passage 23a and the ring-shaped suction passage 23.
It has b. At the highest position of the turntable 10, FIG.
As shown in FIG. 2, the pipe 22 and the hollow portion of the shaft 31 communicate with each other via the suction passage 23b of the vertically movable member 23. As shown in FIG.
A vacuum device (not shown) is connected to b. Further, a push-up pin 25 is disposed on the base 32 at the compact disc P ejection position, as shown in FIGS. At 25, the vertically movable member 23 is pushed upward so that the atmosphere opening passage 23a and the pipe 22 are communicated with each other.

Further, on this base 32, there are mainly images shown in FIG.
As shown in FIG. 2, a detachment pin 26 having an inclined surface 26a for separating the compact disk P from the suction surface 10b of the rotary disk 10 at the compact disk P ejection position is provided.

Structure of compact disc supply device 50 This compact disc supply device 50 is shown in FIGS. 6 to 8.
As shown in FIG.
is received and supplied to the rotary disk 10. The conveyance device 51 moves vertically and horizontally, and sequentially takes out a plurality of compact disks P stacked at positions (not shown) from the top and supplies them to the compact disk supply device 50.

[0023] This compact disc supply device 50 has the following features:
The delivery mechanism section 53 is slidable by the guide 52, and the delivery mechanism section 53 is moved by the slide drive section 54.
It is designed to be slid in the left and right directions in FIGS. 6 and 8. In this delivery mechanism section 53, a slide base 55 is slidably disposed on a guide 52, a case 59 containing a servo motor 58 is rotatably supported on the slide base 55 via a shaft 57, and a rotary actuator 60 is connected to the slide base 55. The rotating part 61 is fixed to the shaft 58a of the servo motor 58, and is rotated by the drive of the servo motor 58. In addition, the code|symbol 62 is a fixed part integrated with the case 59. Then, the suction surface 6 of this rotating part 61
A compact disc P is adapted to be attracted to 1a. The suction means includes a plurality of suction cups 61b... disposed on the suction surface 61a of the rotating part 61, and the suction cups 61b...
and a suction passage 62a formed in the fixed portion 62 are communicated with each other. These suction cups 61b are sucked by a vacuum pump (not shown) through a suction passage 62a even when the rotating part 61 is rotating.

[0024] Further, this fixing part 62 is provided with a plate part 62b that protrudes laterally, and this plate part 62b
As shown in FIG. 8, the first photocell 63 and the second photocell 6
4 are arranged. With these phototubes 63 and 64,
The mark attached to the peripheral edge of the compact disc P is detected, and when the first phototube 63 detects the mark, the rotation of the rotating part 61 by the servo motor 58 is switched from high speed to low speed, and the second It is set so that when the phototube 64 detects a mark, the rotation of the rotating section 61 is stopped.

On the other hand, the slide drive section 54 has an L-shaped link 65 on the base 32, as shown mainly in FIGS. 6 and 8.
A roller 65c is provided on the back side of one end 65b of this L-shaped link 65, and a link 66 is provided on the other end 65d. The slide base 55 is connected via. As this L-shaped link 65 rotates around the shaft 65a, the slide base 55 moves through the link 66 as shown in FIG.
It is designed to slide in the direction of the middle arrow. Further, as mainly shown in FIG. 8, on this base 32, a sliding cam 67 is rotatably disposed on the peripheral edge of which a roller 65c rolls. A notch 67a is formed into which the cutout 67a falls. A tension spring 68 that rotates this L-shaped link 65 clockwise causes the roller 65c to always come into contact with the peripheral edge of the slide cam 67.

Furthermore, as shown in FIG. 8, the delivery mechanism section 5
3 is pushed into the rotary disk 10 side to the maximum extent, the other end 65d of the L-shaped link 65 comes into contact with the push sensor 69a that detects this position, and the delivery mechanism section 53
The return sensor 6 detects this position when the other end 65d of the L-shaped link 65 comes into contact with the L-shaped link 65 when it is separated from the 0 side to the maximum extent.
9b is provided.

[0027] First to fourth printing units 70, 71, 72,
Structure of 73 The first to fourth printing units 70, 71, 72, 73 are as shown in FIG.
As shown, they are arranged around the rotary disk 10 at intervals of 60°.

[0028] These printing units 70, 71, 72,
73 is mainly shown in FIGS. 2 and 9 to 12.

That is, the pair of side walls 74 on the base 32
Between them, a plate cylinder 75 is rotatably supported via a shaft 75a, and as shown in FIG. 12, a plate 75b such as a photolithographic plate is attached to this plate cylinder 75.

[0030] Also, a blanket cylinder 77 for printing the ink transferred from this plate 75b onto the compact disc P.
are arranged as follows. That is, as mainly shown in FIG. 9, on the outside of the pair of side walls 74, a lower end portion 80a of a blanket swinging lever 80 is connected to a shaft 80b.
A blanket cylinder 77 is supported at an intermediate portion of the blanket swing lever 80 via a blanket cylinder saddle 79. This blanket cylinder saddle 79 is rotatably connected to the intermediate part of the blanket swinging lever 80 by a shaft 79a disposed in the intermediate part, and the blanket cylinder saddle 79 is shown in FIG.
A shaft 77a of the blanket cylinder 77 is attached to the middle left end. Further, a compression spring 79 is attached to the right end of the blanket body saddle 79 in the figure to bias the blanket body saddle 79 in a clockwise direction.
b are connected. Furthermore, a roller 79c is disposed on this blanket cylinder saddle 79.

The rotation of the blanket swing lever 80 causes the blanket cylinder 77 to swing around the shaft 80b, and the rotation of the blanket cylinder saddle 79 causes the blanket cylinder 77 to swing around the shaft 79a. , this blanket cylinder 77 is brought into contact with and separated from the plate cylinder 75 and the compact disc P.

As shown in FIG. 10, the plate cylinder 75 and the blanket cylinder 77 are provided with a first gear 78a and a second gear 78b, respectively. Further, as shown in FIG. 10, the shaft 75a of the plate cylinder 75 is provided with a bevel gear 78d at the end protruding from the side wall 74, and a bevel gear 78e is connected to the bevel gear 78d to a drive source (not shown). are meshing.

A transfer shaft 81 is installed on the upper end portions 80b of the pair of blanket swing levers 80, while a printing pressure adjustment screw 82a serving as a stopping means is screwed into a plate 82 installed on the pair of side walls 74. are combined. When the blanket swinging lever 80 is rotated counterclockwise in FIG.
The rotation is stopped when it comes into contact with the head of a.

[0034] Then, this blanket swinging lever 80
is rotated by the following mechanism. That is, as shown in FIGS. 9 to 11, a cylindrical body 83 is rotatably disposed on a pair of side walls 74, a plate spring 84 is inserted into this cylindrical body 83, and one end 84a of this plate spring 84 is While fixed to the base 32, this leaf spring 8
The other end 84b of 4 is fixed to one end 83a of the cylinder 83. Due to the biasing force of the leaf spring 84, the cylinder body 83 is biased counterclockwise in FIG. The biasing force is adjusted by adjusting the twist angle of the leaf spring 84.

A base end 85a of a first arm 85 is fixed to the cylindrical body 83 inside the side wall 74.
A roller 85b provided at the tip of this first arm 85
is adapted to roll on the peripheral edge of the blanket cylinder swing cam 86. This blanket body rocking cam 86 is
It is fixed on the shaft 75a of the plate cylinder 75, and has a small diameter circular arc portion 86a and a large diameter circular arc portion 86b. This roller 85b is urged upward via the cylinder 83 by the urging force of the leaf spring 84. Furthermore, this cylindrical body 83 has a structure shown in FIG.
As shown in , a base end 87a of the second arm 87 is fixed, and a lower end of a first toggle lever 88a is rotatably attached to the tip 87b of the second arm 87 about a shaft 88d. One ends of second and third toggle levers 88b and 88c are rotatably attached to the upper end of the first toggle lever 88a about a shaft 88e. This second
The other end of the toggle lever 88b is rotatably attached to the blanket swinging lever 80 by a shaft 88f, and the other end of this third toggle lever 88c is attached to the side wall 74 by the shaft 8.
It is rotatably attached with 8g.

As a result, when the second arm 87 is rotated upward, the blanket swing lever 80 is rotated counterclockwise via the first, second, and third toggle levers 88a, 88b, and 88c forming a toggle mechanism. It is designed to be rotated.

Furthermore, the blanket swing lever 80
A roughly L-shaped stop lever 89 for stopping counterclockwise rotation is rotatably disposed on the outside of the side wall 74 by a shaft 89a provided at the bent portion. This stop lever 89 has a locking member that locks with a rectangular parallelepiped-shaped locking pawl 80c provided on the blanket swing lever 80 to stop the counterclockwise rotation of the blanket swing lever 80. A claw 89b is formed. An air cylinder 90 is provided at one end of the stop lever 89.
The stop lever 89 is urged clockwise in FIG. 9 by a spring 91 provided at the other end of the stop lever 89.

Furthermore, a saddle drive cam 93 for rotating the blanket cylinder saddle 79 clockwise in FIG. 9 is disposed on the shaft 75a of the plate cylinder 75. A cam portion 93a that comes into contact with the roller 79c of the blanket cylinder saddle 79 is formed at the upper part of the saddle drive cam 93. When the saddle drive cam 93 is rotated clockwise in FIG. 9, the blanket cylinder saddle 79 is rotated counterclockwise via the roller 79c. This saddle drive cam 93 is rotated by the following mechanism. That is, a rotary actuator 94 is fixed to the outside of the side wall 74 as shown in FIG. 10, and an eccentric disk 94b is fixed to a drive shaft 94a of this rotary actuator 94 as shown in FIG.
This eccentric disk 94b is rotatably inserted into a hole 96a at the upper end of the connecting rod 96 via a bearing 95. A lower end 96b of this connecting rod 96 is rotatably connected to the saddle drive cam 93. rotary actuator 94
As the eccentric disk 94b rotates due to the drive of
This connecting rod 96 moves up and down, and the saddle drive cam 93 is rotated.

On the other hand, an ink unit 92 is disposed around the plate cylinder 75, as shown in FIG. This ink unit 92 includes a fountain roller 92a, a transfer roller 92b, an application roller 92c, and the like.

Structure of Drying Apparatus 100 As shown in FIG. A conveyor 102 is provided to receive the ejected compact disc P and move it within the drying chamber 101, and this conveyor 102 ejects the compact disc P to the outside.

Next, the operation of the printing apparatus having such a configuration will be explained.

First, the cam member 38 is constantly rotated by the index 35 shown in FIG. 1 via the chain 39, so that the swing lever 37 is rotated in the vertical direction. When the cam member 38 first rotates 120 degrees, the rotary disk 10 is raised at the rising portion 38a, and when the cam member 38 rotates the next 120 degrees, the raised position of the rotary disk 10 is maintained at the stop portion 38b. By rotating by 120 degrees, the rotary disk 10 is lowered by the lowering portion 38c.

While the raised position of the rotary disk 10 is maintained at this stop portion 38b, that is, the cam member 38 is rotated at 120°.
While rotating, spline shaft 3 at index 35
6, the turntable 10 is rotated by 30 degrees.

While the rotary disk 10 is raised, maintained in the raised state, and lowered in this manner, the following operations are performed.

Compact Disc P Supply Stroke Compact disc P is supplied while the rotary disk 10 is in a lowered state. That is, as shown in FIG. 6, the compact disc P is transported by the transport device 51 and placed on the suction surface 61a of the rotating section 61 facing above the delivery mechanism section 53. Then, a vacuum is drawn by a suction device (not shown), and the compact disc P is sucked by a plurality of suction cups 61b. In this state, the shaft 58a of the servo motor 58 protrudes from the central hole of the compact disc P.

Thereafter, the transfer mechanism section 53 is rotated by 90 degrees by the rotary actuator 60, so that the compact disc P is opposed to the suction surface 10b of the rotary disk 10 (as shown by the solid line in FIG. 6). Next, the delivery mechanism section 53 is guided by the guide 52 and slid to the left in FIG. 6, so that the compact disc P is attracted to the attraction surface 10b of the rotary disk 10.

That is, when the roller 65c of the L-shaped link 65 comes to the position of the notch 67a of the cam 67 due to the rotation of the slide cam 67, the slide moves as shown in FIG. 8 due to the biasing force of the tension spring 68. As shown, this roller 65c falls into the notch 67a, and the L-shaped link 65
rotates clockwise in FIG. As a result, the delivery mechanism section 53 is slid to the left in FIGS. 6 and 8, and the turntable 1
After passing the compact disc P to the suction surface 10b of 0,
The rotation of the slide cam 67 causes the delivery mechanism section 53 to slide directly to the right. That is, only when the roller 65c is located at the position of the notch 67a, the delivery mechanism section 5
3 slides to the left, and in most of the other parts, the delivery mechanism section 53 is on standby at a position on the right side in FIG.

When the transfer mechanism section 53 is slid to the maximum left side in FIGS. 6 and 8, this state is detected by the push-in sensor 69a, and when this signal is received, the suction cup 61
The vacuum on b is released, and the compact disc P is delivered to the rotary disk 10 side.

[0049] Also, at the time when it is slid to the maximum right side in Fig. 6, this state is detected by the return sensor 69b, and at the time when this signal is received, the transfer mechanism section 53 is rotated by 90 degrees by the rotary actuator 60. Make them stand up.

[0050] The compact disc P is received on the rotary disk 10 side as follows. That is, when the above-mentioned delivery mechanism section 53 slides to the left in FIG. At the same time, the pressing pin 17 of this pressing member 17
The slide member 18 is pressed by the second spring 20
It is slid to the left in FIG. 4 against the urging force of.

[0051] Now, the communication path 18a of the slide member 18
The pipe 22 and the suction cup passage 12a are communicated through the pipe 22 and the suction cup passage 12a. Then, the hollow portion of the shaft 31 communicates with the suction cup 12 and the negative pressure chamber 21. Now, the compact disc P is attracted to the suction cup 12, and the negative pressure chamber 21 becomes negative pressure, so the slide member 18 is stopped at this position, and the suction state of the compact disc P by the suction cup 12 is maintained. .

This process is performed every time the rotary disk 10 is rotated by 60 degrees, and the compact disks P are successively attracted to each suction surface 10b of the rotary disk 10.

From this state, the rising portion 38 of the cam member 38
When the roller 37c of the swing lever 37 rolls on a, the swing lever 37 is rotated upward, and the rotary disk 10 is raised.

Next, after rotating the rotary disk 10 by 60° using the index 35, the descending portion 38c of the cam member 38
When the roller 37c of the swing lever 37 rolls, the swing lever 37 is rotated downward by the tension spring, and the rotary disk 10 is lowered.

Immediately before the rotary disk 10 is lowered, the vertically movable locating pin 43 is raised by the index 35 and inserted into the through hole 10d of the rotary disk 10.
0 is lowered, and during this lowering, the fixed locate pin 42
is inserted into the through hole 10d of the rotary disk 10. Immediately before the rotary plate 10 descends, the vertical locating pin 43
is inserted into the through hole 10d to position the rotary disk 10, and while descending to the rotary disk 10, a plurality of fixed locating pins 42 are inserted into the through hole 10d. Descending can be done well. In the case where a plurality of fixed locating pins 42 are inserted at once during the descent, if there is a positional shift in the rotating disk 10, the rotating disk 10 will be inserted into the fixed locating pins 42.
may collide with the upper end of the unit all at once, resulting in a large impact.

Note that during this descent, the blanket cylinder 77 is rotated counterclockwise in FIG.
The robot is evacuated from the vertical movement range of the robot.

When the rotary disk 10 reaches the lowest position, the blanket cylinder 77 is rotated counterclockwise in FIG. 9 as shown below.

The blanket cylinder swing cam 86 is in a rotating state together with the plate cylinder 75 via the printing stroke bevel gears 78e and 78d. In this state,
As shown in FIG. 9, due to the biasing force of the plate spring 84, the cylinder 8
Since the first arm 85 whose base end 85a is fixed to the first arm 85 is biased counterclockwise in the figure, the roller 85b rolls on the blanket cylinder swing cam 86. This roller 85b is connected to the large diameter arc portion 8 of the blanket cylinder rocking cam 86.
6b to the small diameter arc portion 86a, the first arm 85 is rotated somewhat counterclockwise in the figure. As a result, the blanket swing lever 80 is rotated counterclockwise in FIG. 9 via the first, second, and third toggle levers 88a, 88b, and 88c that constitute the toggle mechanism. This rotation of the blanket swing lever 80 causes the blanket cylinder 77 to swing toward the rotary disk 10 via the blanket cylinder saddle 79. The blanket swinging lever 80 is rotated until the central part of the passing shaft 81 provided on the blanket swinging lever 80 comes into contact with the head of the printing pressure adjustment screw 82a.
is rotated.

At the same time, the drive shaft 94 of the rotary actuator 94 is activated by the signal from the blanket cylinder 77ON.
a rotates 180° together with the eccentric disk 94b. As a result, the connecting rod 96 moves downward, and the saddle drive cam 93 rotates clockwise in FIG. The cam portion 93a of the saddle drive cam 93 rotates the blanket cylinder saddle 79 counterclockwise about the shaft 79a via the roller 79c. As a result, the blanket cylinder 77 comes into contact with the plate cylinder 75.

As the first gear 78a of the plate cylinder 75 meshes with the second gear 78b of the blanket cylinder 77, the blanket cylinder 77 rotates in synchronization with the plate cylinder 75, and the application roller 92c ON signal causes the blanket cylinder 77 to rotate. The roller 92c contacts the plate cylinder 75. The ink that comes out of the ink fountain passes through the fountain roller 92a and the transfer roller 92b, and then becomes a thin, uniform film by the kneading roller 92d, which is transferred to the application roller 92c, where the ink adheres to the lipophilic portion of the plate 75b, and this film is transferred to the application roller 92c. The ink is transferred to the blanket cylinder 77.

When the swinging lever 37 is rotated upward by the rising portion 38a of the cam member 38, the rotary disk 10 is guided by the fixed and vertically movable locating pins 42 and 43 and raised. This rise causes the blanket cylinder 77 to roll over the compact disk P positioned on the suction surface 10b of the rotary disk 10, thereby performing offset printing. In this case, the compact disc P is
By being sandwiched between the suction surface 10b and the blanket cylinder 77, the blanket cylinder 77 can be pressed against the compact disc P with a predetermined pressure, and highly accurate printing can be performed. In addition, in this case, the rotary disk 1
0 is fixed and raised while being guided by the vertically movable locating pins 42 and 43, so the rotary disk 10 does not rotate and the printing does not become misaligned.

This printing is performed by changing the position of the printing pressure adjustment screw 82a according to the thickness of the compact disc P, thereby adjusting the amount of rotation of the blanket swinging lever 80, that is, the amount of rotation of the blanket cylinder 77 toward the rotary disk 10. The amount of approach can be adjusted, and even if the thickness of the compact disc P changes, highly accurate printing can be performed.

On the other hand, when a print OFF signal is input, the pin 90a of the air cylinder 90 in FIG. 9 is retracted, and the stop lever 89 is pulled up by the spring 91. When the blanket swinging lever 80 moves to the right, the locking claw 80 attached to the blanket swinging lever 80
c and the locked claw 89 attached to the stop lever 89
b are engaged, and the swinging of the blanket cylinder 77 is stopped at the retracted position.

At this time, the roller 85b of the first arm 85 stops while remaining separated from the small diameter portion 86a of the blanket cylinder swing cam 86.

When printing is turned on, the pin 90a of the air cylinder 90 protrudes and hits the stop lever 89, releasing the locking claw 80c and the locked claw 89b.
The blanket cylinder 77 swings and becomes ready for printing.

[0066] Due to the OFF signal of the blanket cylinder 77,
The rotary actuator 94 rotates 180 degrees in the opposite direction, the connecting rod 96 rises, and the saddle drive cam 93 rotates counterclockwise, so that the blanket cylinder saddle 79 is rotated clockwise by the compression spring 79b and the blanket cylinder 77 and the plate cylinder 75 are separated.

At the same time, with the delivery mechanism section 53 sliding to the right in FIG. 8, the pin 69 of the solenoid 69c
d engages with the L-shaped link 65 and prevents clockwise rotation of the L-shaped link 65, thereby stopping the supply of the compact disc P to the rotary disk 10.

[0068] Then, in this raised position, in the same manner as above,
The rotary disk 10 is rotated by 30 degrees by the drive device 30, and the same operation as described above is repeated.

[0069] Such printing operations are performed in the first, second, third, and fourth printing operations.
The printing units 70, 71, 72, and 73 are sequentially printed in the order of yellow, indigo, red, and black, thereby performing color printing.

Compact disc P ejection process The compact discs P on which color printing has been completed are sequentially ejected each time the rotary disk 10 is lowered. That is, when the rotary disk 10 is lowered, the vertically movable member 23 is pushed up by the push-up pin 25, as shown in FIG. Then, the suction cup 12 is exposed to the atmosphere through the communication path 18a of the slide member 18, and the suction force is released. Along with this, the release pin 26
The peripheral edge of the compact disc P is pushed by the inclined surface 26a, and the compact disc P is separated from the rotary disk 10 and dropped onto the conveyor 102 of the drying device 100.

Then, as the conveyor 102 moves, the compact disc P passes through the drying chamber 101 and is dried in the drying chamber 101, thereby completing printing.

Multicolor printing process This printing device has four printing units 70, 71, 72, 73.
However, to perform more multicolor printing,
The compact disc P which has completed the above-mentioned compact disc P ejection process is printed again through each process from the compact disc P supply process.

[0073] When performing this second printing, the rotary plate 1
It is necessary to set the compact disc P in the same position as the first time with respect to the suction surface 10b of 0. In this case, the compact disc P is positioned as follows.

That is, with the compact disc P being sucked, the rotating section 61 of the delivery mechanism section 53 is rotated counterclockwise in FIG. 6 by the servo motor 58. During this rotation, the first phototube 63 detects a mark previously formed on the periphery of the compact disc P, and the rotational speed is switched from high speed to low speed. Next, the second phototube 64 detects the mark, and the servo motor 58 stops rotating at this position to position the compact disc P.

In this way, by rotating the compact disc P at high speed until it reaches the stop position (the position of the second phototube 64) (the position of the first phototube 63), and then switching this rotation to a low speed, the compact disc P can be rotated in a short time. Moreover, it is possible to accurately position the compact disc P and to perform multicolor printing.

Since the rotary disk 10 of this printing device has a polygonal surface, each printing section 70 to 73 can be adjusted by increasing or decreasing the number of surfaces.
can be easily added or removed.

Furthermore, each printing section 70 to 73 has 60
Because they are spaced apart, there is play in one process between each printing section 70 to 73, so there is less dry color contamination on the ink surface compared to other machines, and between these, it is compact. The printing state of the disc P can be visually observed.

Moreover, since the diameter of the blanket cylinder 77 is small, this blanket cylinder 77 can be used for compact disc P.
Sharp printing can be achieved with small printing pressure when pressing.

Furthermore, since the plate cylinder 75 is large, the blanket cylinder 77, ink unit 92, etc. can be arranged sufficiently.
Printing with less color unevenness is possible.

The stopping means of the present invention uses the printing pressure adjusting screw 82a in the above embodiment, but is not limited to this. An eccentric cam is attached to the transfer shaft 81, and the mounting position of the eccentric cam is adjusted. By changing, the stopping position can also be adjusted.

[0081]

[Effects of the Invention] As explained above, according to the present invention, when the thickness of printed matter changes, depending on this thickness,
By stopping the blanket swinging lever at an arbitrary position using the stopping means, a practically useful effect is achieved in that even if the thickness of the printed matter changes, highly accurate printing can be performed.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the entire printing apparatus showing an embodiment of the printing apparatus of the present invention.

FIG. 2 is a plan view of a rotary disk and the like according to the same embodiment.

FIG. 3 is a cross-sectional view showing a state of the rotary disk immediately before being lowered according to the same embodiment.

FIG. 4 is a sectional view showing the rotary disk in the lowest state according to the same embodiment.

FIG. 5 is a front view of the suction surface of the rotary disk according to the same embodiment.

FIG. 6 is a schematic front view of a printed matter supply device according to the same embodiment.

FIG. 7 is a sectional view of the delivery mechanism section of the printed matter supply device according to the same embodiment.

FIG. 8 is a plan view of a printed matter supply device according to the same embodiment.

FIG. 9 is a side view of a printing section according to the same embodiment.

FIG. 10 is a front view of a printing section according to the same embodiment.

FIG. 11 is a cross-sectional view of a cylinder, etc. of a printing section according to the same embodiment.

FIG. 12 is a side view schematically showing a printing section according to the same embodiment.

[Explanation of symbols]

75 Plate cylinder 75b version 77 Blanket body 80 Blanket swing lever 82a　Print pressure adjustment screw (stopping means) P Printed matter

Claims (1)

[Claims] 1. A plate cylinder provided with a plate, a blanket cylinder that slides on the plate cylinder and prints on printed matter, and a blanket swing lever that swings the blanket cylinder toward and away from the printed matter. a printing device that has a blanket swinging lever that brings the blanket cylinder into contact with the printed material to transfer ink from the plate of the plate cylinder to the blanket cylinder, and further prints on the printed material from the blanket cylinder. A printing apparatus characterized in that a stopping means is provided for stopping the blanket swinging lever rotated to the side at an arbitrary position.