JP2001225446A - Liquid supplying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid supplying device, with which liquid can be favorably supplied from a liquid supplying cylinder to a sheet-like matter held on a impression cylinder. SOLUTION: In a screen printing unit 20e with an impression cylinder 100, which is rotatably supported and has a sheet-like matter holding a sheet 1, a rotary screen 27, which opposingly contacts with the impression cylinder 100 and supplies special ink or the like to the sheet 1 held by the impression cylinder 100, each sheet-like matter holding means is equipped with a head 117 or the like for suckingly holding the sheet 1, a gripping claw 123 or the like for gripping the sheet 1, a pinion 124, a cam plate 125, a screw shaft 126, a traveling nut 127, a supporting shaft 128, a lever 129, a cam follower 130 or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid supply device capable of supplying a printing or application of a liquid such as ink or varnish to a sheet-like material such as a sheet held on an impression cylinder. This is effective when applied to screen printing on a sheet.

[0002]

2. Description of the Related Art Conventional printing presses for performing screen printing include:
A rotary screen equipped with an ink fountain and a squeegee fixedly supported on a frame inside a hollow cylinder that rotatably supports a thin screen (made of stainless steel, nickel, etc.) with small holes etched according to the pattern By printing the ink in the ink fountain from the small hole of the hollow cylinder with a squeegee while rotating the hollow cylinder, printing corresponding to the pattern can be performed.
For this reason, the rotary screen printing can be printed with a thick ink using a special ink or the like, so that it is applied when giving a high-quality appearance or touch.

[0003]

As described above, since the rotary screen prints by extruding a special ink or the like from a small hole while pressing a thin hollow cylinder with a squeegee from the inside, the screen is screened on the web. When printing is performed, it is difficult to satisfactorily perform printing because the web tension tends to change.

[0004] On the other hand, when printing on a sheet using a rotary screen, the tension is not changed in the sheet, so that the printing can be performed satisfactorily. Since the holding claws must be provided on the impression cylinder for gripping, there is a possibility that the holding claws come into contact with the hollow body of the rotary screen that is in contact with the impression cylinder and damage the hollow body.

For example, Japanese Patent Application Laid-Open No. H11-26844 discloses
In Japanese Patent Application Publication No. 4 (1993) -204, it has been proposed to provide a concave portion for releasing the gripping claws of the impression cylinder on the outer peripheral surface of the blanket cylinder in contact with the impression cylinder so as to avoid interference with the gripping claws. It is conceivable to replace the blanket cylinder with a rotary screen to solve the above-mentioned problem.

However, Japanese Patent Application Laid-Open No. 11-268444 discloses
In order to solve the above-mentioned problem by replacing the blanket cylinder proposed in Japanese Patent Application Publication No. H10-15064 with a rotary screen, a concave portion must be formed in the hollow cylinder of the rotary screen so as to avoid interference with the holding claws of the impression cylinder. Therefore, the squeegee of the rotary screen jumps up in the concave portion, and there is a possibility that printing failure may occur.

[0007] Such a problem is not limited to a case where a special ink or the like is thickly printed on a sheet using a rotary screen. For example, a case where a varnish or the like is applied to a sheet using a rotary screen is used. In the case where the liquid is supplied from the liquid supply cylinder to the sheet-like material held by the impression cylinder, this can occur in the same manner as the above-described case.

In view of the above, an object of the present invention is to provide a liquid supply apparatus capable of supplying a liquid from a liquid supply cylinder to a sheet-like material held by an impression cylinder in a satisfactory manner.

[0009]

According to a first aspect of the present invention, there is provided a liquid supply apparatus comprising: an impression cylinder having sheet-like material holding means rotatably supported to hold a sheet-like material; A liquid supply cylinder which is in contact with the impression cylinder and supplies liquid to the sheet-like material held by the impression cylinder, wherein the sheet-like material holding means of the impression cylinder comprises: Suction holding means for suction holding
It is characterized by comprising gripper holding means having grippers for gripping the sheet-like material, and gripper retracting means for retracting the grippers of the gripper holding means to the inside of the impression cylinder.

In the above-described liquid supply apparatus, a liquid supply cylinder retracting means for moving the liquid supply cylinder toward and away from the impression cylinder is provided.

In the above-described liquid supply apparatus, the holding claw retracting means includes a cam plate rotatably supported, a cam plate rotating means for rotating the cam plate, and the holding claw of the holding means. A pinion provided on a shaft that supports the cam plate, a lever that is swingably supported, a cam follower that is provided on one end side and abuts on a cam surface of the cam plate, and a rack that is formed on the other end side and that meshes with the pinion; It is characterized by having.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the liquid supply apparatus according to the present invention will be described below, but the present invention is not limited to these embodiments.

[First Embodiment] A first embodiment of a printing machine in which a liquid supply device according to the present invention is applied to a screen printing unit will be described with reference to FIGS. FIG. 1 is an overall schematic configuration diagram of the printing press, FIG. 2 is an extracted enlarged view of an arrow II portion in FIG. 1, FIG. 3 is an extracted enlarged view of an arrow III portion in FIG. 1, and FIG. FIG. 5 is a cross-sectional view of FIG. 4, and FIG.
FIG. 7 is a view taken in the direction of the arrow VI in FIG. 5, and FIG.
8 is a sectional view taken along the line VIII-VIII in FIG. 5, FIG. 9 is a schematic configuration diagram of an end face portion of the impression cylinder of the screen printing unit, and FIG. FIG. 11 is a diagram viewed from the direction of arrow XI in FIG. 10, FIG. 12 is an internal structure diagram of arrow XII in FIG. 11, FIG.
3 is an operation explanatory view of FIG. 9, and FIG. 14 is an arrow XIV of FIG.
FIG. 15 is a view as viewed from the direction of arrow XV in FIG. 13, and FIG. 16 is an enlarged view of extraction of the part indicated by arrow XVI in FIG. 15.

As shown in FIG. 1, the paper supply section 10 is provided with a paper supply table 11. The paper feed unit 10 includes a paper feed table 11
A feeder board 12 that feeds the upper sheet-like sheet 1 to the printing unit 20 one by one is provided. At the leading end of the feeder board 12, a swing device 13 for transferring the sheet 1 to the impression cylinder 21a of the first offset printing unit 20a of the printing unit 20 is provided.

As shown in FIGS. 1 and 2, a blanket cylinder 22a is in contact with the impression cylinder 21a of the first offset printing unit 20a of the printing unit 20 at a position downstream of the swing device 13 in the rotation direction. A plate cylinder 23a is in contact with the blanket cylinder 22a on the upstream side in the rotation direction from the impression cylinder 21a. An ink supply device 24 is disposed upstream of the plate cylinder 23a in the rotation direction from the blanket cylinder 22a.
a is provided. Ink supply device 24 for plate cylinder 23a
A water supply device 25a is provided on the upstream side in the rotation direction from a.

As shown in FIG. 1, the downstream side of the impression cylinder 21a of the first offset printing unit 20a in the rotational direction from the blanket cylinder 22a is opposed to the impression cylinder 21b of the second offset printing unit 20b via a transfer cylinder 26a. In contact. The second offset printing unit 20b includes a blanket cylinder 22b and a plate cylinder 2 in the same manner as the first offset printing unit 20a.
3b, an ink supply device 24b, a water supply device 25b, and the like.

The second offset printing unit 20b
The downstream side of the impression cylinder 21b in the rotation direction from the blanket cylinder 22b is connected via the transfer cylinder 26b to the third offset printing unit 20c.
Is in contact with the impression cylinder 21c. The third offset printing unit 20c also has a blanket cylinder 22c and a plate cylinder 2 in the same manner as the first and second offset printing units 20a and 20b.
3c, an ink supply device 24c, a water supply device 25c, and the like.

Further, the third offset printing unit 20
The downstream side in the rotational direction from the blanket cylinder 22c of the impression cylinder 21c of FIG.
Via the transfer cylinder 26c, the fourth offset printing unit 20
d is in contact with the impression cylinder 21d. The fourth offset printing unit 20d also includes a blanket cylinder 22d, a plate cylinder 23d, an ink supply device 24d, a water supply device 25d, and the like, similarly to the first to third offset printing units 20a to 20c.

As shown in FIGS. 1 and 3, on the downstream side of the blanket cylinder 22d of the impression cylinder 21d of the fourth offset printing unit 20d in the rotational direction, the impression cylinder 100 of the screen printing unit 20e is connected via a transfer cylinder 26d. In contact with the impression cylinder 1
00 has the following structure.

As shown in FIGS. 4 and 5, a fixing ring 10 is attached to a frame 20ea of the screen printing unit 20e.
The end of the rotating shaft 103 is rotatably supported via the bearing 1 and the bearing 102. Inside the rotating shaft 103, a communication hole 103a is formed along the axial direction. A connecting shaft 104 is coaxially attached to a shaft end of the rotating shaft 103. A plurality of (two in this embodiment) communication holes 104c are formed inside the connection shaft 104 along the axial direction.
Has one end connected to the inside of the communication hole 103a of the rotating shaft 103 via the pipe 105, while the other end is closed.

A connection hole 104a for connecting to the communication hole 104c is formed at a predetermined position in the circumferential direction of the connection shaft 104 near the other end of the outer peripheral surface of the connection shaft 104. A connection hole 104b for connecting to the communication hole 104c is provided near one end of the surface.
(See FIG. 7, FIG. 7).
8).

The connecting shaft 104 of the fixing ring 101
The connecting tool 1 is attached to the side end so that one end of an outer cylinder 107 surrounding the connecting shaft 104 is coaxial with the connecting shaft 104.
06 and fixed. A connection hole 1 for communicating between the inside and the outside of the outer cylinder 107 is provided on a peripheral surface of the outer cylinder 107.
07a and 107b are formed at predetermined positions in the circumferential direction of the outer cylinder 107 (see FIGS. 5 and 6).

A sleeve 108 is inserted between the outer tube 107 and the connecting shaft 104 so as to be coaxial with the connecting shaft 104 and the outer tube 107.
The connection shaft 104 is fixedly supported on the outer cylinder 107.
Is rotatably supported. A connection groove 108a for connecting the connection hole 104a of the connection shaft 104 and the connection hole 107a of the outer cylinder 107 at a predetermined cycle with the rotation of the connection shaft 104 on the peripheral surface of the sleeve 108, 1
04 and the connection hole 107 of the outer cylinder 107
and a connection groove 108b for connecting b with a predetermined period is formed at a predetermined position in a circumferential direction of the sleeve 108 with a predetermined length (see FIGS. 5, 7, and 8).

A suction pump (not shown) is connected to the connection hole 107 a of the outer cylinder 107 via a hose 109. The connection hole 107b of the outer cylinder 107 has an air muffler 1
10 are connected.

That is, when the rotating shaft 103 is rotated to rotate the connecting shaft 104 and the suction pump is operated, each communicating hole 104c of the connecting shaft 104 is connected to the connecting hole 10c.
4a, it communicates with the connection groove 108a of the sleeve 108 at regular intervals, communicates with the suction pump through the connection hole 107a of the outer cylinder 107, and sucks the air inside, while connecting through the connection hole 104b. Connecting groove 1 of sleeve 108
08b at regular intervals, communicates with the air muffler 110 via the connection hole 107b of the outer cylinder 107, and the internal pressure is returned to the external pressure.

On the other hand, as shown in FIGS.
03, a trunk body 111 is integrally connected and supported via spokes 112 so as to be coaxial with the rotation shaft 103. As shown in FIG. 9, the outer peripheral surface of the trunk main body 111 has a recess 111 a along the axial direction of the trunk main body 111.
Are formed at equal intervals along the circumferential direction of the body 111 (two locations in the present embodiment).

As shown in FIGS. 9 to 12, a plurality of communication holes 113a for communicating between the inside and the outside are formed in the notch portion 111a of the body 111 at predetermined intervals along the axial direction on the peripheral surface. The pipe 113 is attached so as to face the axial direction of the body 111. Holders 114 are attached to the communication holes 113a of the pipe 113, respectively. On the upper surface of the holder 114, a circular mounting groove 114b is formed. In the mounting groove 114b of the holder 114, a communication hole 114a that is connected to the communication hole 113a of the pipe 113 is formed.

In the mounting groove 114b of the holder 114, the communication hole 114a is formed by rotating a screw 115.
An opening / closing plate 116 for opening and closing is provided. Holder 1
A head 117 which is a plate-shaped suction holder having a hole for projecting the head of the screw 115 is attached to an upper part of the screw. The holder 1 is provided on the upper surface of the head 117.
A suction port 117a communicating with the communication hole 114a is formed.

As shown in FIGS.
Is connected to one end of the pipe 118.
One end of a hose 119 is connected to the other end of the pipe 118. The other end of the hose 119 is connected to the rotating shaft 10.
3 and is connected to the pipe 105 (see FIGS. 3 to 5).

That is, when the rotation shaft 103 is rotated to rotate the connection shaft 104 and the suction pump is operated, the connection hole 104a of the connection shaft 104 is
Of the connection hole 104 when the connection hole
The inside of the pipe 113 connected through the pipe 105, the hose 119, and the pipe 118 is sucked from the communication hole 104 c communicating with the pipe a, and the suction of the head 117 is performed through the communication hole 113 a of the pipe 113 and the communication hole 114 a of the holder 114. Air is sucked from the port 117a and the connecting shaft 10
No. 4 connection hole 104b is the connection groove 108b of the sleeve 108
Communication hole 104c communicating with the connection hole 104b when the pipe 105, the hose 119, the pipe 1
The communication hole 113a of the pipe 113 and the communication hole 1 of the holder 114
The suction port 117a of the head 117 and the air muffler 110 communicate with each other via 14a, and the space between the suction port 117a and the air muffler 110 is returned to the atmospheric pressure.

Further, by opening and closing the communication holes 114a of the holders 114 with the opening and closing plate 116 by rotating the screws 115, the suction ports 117a of the heads 117 can be individually opened and closed, respectively. 1
04 and the connection groove 1 of the sleeve 108
Regardless of the presence or absence of connection to the head 08a, suction of air from the suction port 117a of the head 117 can be set for each head 117.

In this embodiment, the connecting shaft 104,
The switching means is constituted by the outer cylinder 107, the sleeve 108 and the like, and the suction means is constituted by the pipes 105 and 118, the hoses 109 and 119, the pipe 113, the suction pump and the like, and is opened and closed by the holder 114, the screw 115, the opening and closing plate 116 and the like. The switching means, the suction means, the opening / closing means, the head 117 (suction holder), and the like constitute a suction holding means.

Also, as shown in FIGS.
In the notch portion 11a, a shaft 121 whose longitudinal direction is directed along the longitudinal direction of the pipe 113 is rotatably provided. A plurality of holding claws 123 are attached to the shaft 121 in the vicinity of the heads 117 via a claw holder 122, respectively.
Depending on the rotation angle of the shaft 121, the gripper 12
The sheet 1 can be held between the head 3 and the head 117 (see FIGS. 13 to 16), and the holding claw 123 can be retracted by being buried in the notch 111a. (See FIGS. 9 and 10).

As shown in FIGS.
A pinion 124 is coaxially attached to one end of the shaft 21. On one axial end side of the rotating shaft 103, a diamond-shaped cam plate 125 in which the length between one set of opposed corners 125a is longer than the length between another set of opposed corners 125b is rotated. Supported as possible. This cam plate 1
A moving nut 127 screwed to a screw shaft 126 rotatably supported by the body 111 is connected to 25. That is, when the screw shaft 126 is rotated, the moving nut 127 is rotated.
Is moved, and the cam plate 125 can be rotated about the rotation shaft 103.

The rotating body 103 is attached to the body 111.
Lever 129 rotatably supported by a fulcrum pin 128 whose axial direction is oriented in the axial direction of 対 is provided so as to form a pair at positions that are point-symmetric about the rotary shaft 103. At the end (one end) of the lever 129 on the axial center side of the body 111, the corner 12 of the cam plate 125 is provided.
Cam follower 13 which abuts on cam surface 125c around 5a
0 is provided respectively. Racks 129a that mesh with the pinions 124 are formed at the ends (the other end sides) of the levers 129 on the peripheral surface side of the trunk main body 111, respectively.

That is, the screw nut 126 is rotated to move the moving nut 127. For example, as shown in FIG. 9, the cam plate 125 is rotated so that the corner 125a of the cam plate 125 contacts the cam follower 130. When the lever 129 is moved, the lever 129 swings about the fulcrum pin 128 so as to move one end side away from the rotation shaft 103, and the rack 129a at the other end side of the lever 129 engages with the pinion 124, and the notch 111a The shaft 121 is rotated so that the holding claw 123 is buried and retracted, while the cam plate 125 is moved away from the cam follower 130 as shown in FIG.
Is rotated, one end of the lever 129 is turned to the rotation shaft 103.
Swing around the fulcrum pin 128 so as to approach the side,
The rack 129a on the other end side of the lever 129 rotates the shaft 121 via the pinion 124 so that the holding claw 123 retracted in the notch 111a is projected and made to stand by, and at the same time, the pinion 124 is moved. Thus, the rack 129a can be released from meshing with the rack 129a.

As shown in FIG. 15, a cam follower 132 is connected to the other shaft end of the shaft 121 via a lever 131. A cam plate 133 is coaxially spline-coupled to the other shaft end of the rotating shaft 103. The distal end side of an actuator 134 whose base end is connected to the frame 20ea of the screen printing unit 20e is connected to the cam plate 133.
By contracting the actuator 134, the cam plate 133 can be stored in the storage groove 20eb formed in the frame 20ea, and by extending the actuator 134, the cam surface 133c of the cam plate 133 can be stored. And the cam follower 132 can be brought into contact with each other.

In this embodiment, the shaft 12
1, claw holder 122, gripper 123, lever 131,
Cam follower 132, cam plate 133, actuator 1
34, etc., constitute the holding means, and the screw shaft 12
6. The cam plate rotating means is constituted by the moving nut 127 and the like, and the cam plate rotating means, the pinion 124, the cam plate 12
5, fulcrum pin 128, lever 129, cam follower 13
The gripper retracting means is constituted by 0 or the like, and the sheet holding means is constituted by the gripper holding means, the gripper retracting means, the suction holding means, and the like.

As shown in FIGS. 1 and 3, a rotary screen 27, which is a liquid supply cylinder, is in contact with the impression cylinder 100 of the screen printing unit 20e downstream of the transfer cylinder 26d in the rotation direction. This rotary screen 2
Reference numeral 7 denotes a hollow body 27a rotatably supporting a thin screen (made of stainless steel, nickel, or the like) having a small hole etched in accordance with a picture and having a cylindrical shape.
a, an ink fountain 27b and a squeegee 27c fixedly supported by a frame.

That is, in the rotary screen 27, the hollow cylinder 27a rotates with the rotation of the impression cylinder 100, and the special ink or the like, which is the liquid in the ink fountain 27b, is squeegee 27c.
By being extruded from the small holes of the hollow cylinder 27a, printing corresponding to the small holes of the hollow cylinder 27a can be performed on the sheet 1 held by the impression cylinder 100. It is.

The rotary screen 27 is supported by a slide frame 135 and can move toward and away from the impression cylinder 100. The distal end of an actuator 136 whose base end is supported by the frame 20ea of the screen printing unit 20e is connected to the slide frame 135.

That is, when the actuator 136 is extended, the rotary screen 27 can be moved away from the impression cylinder 100 via the slide frame 135 and retracted. When the actuator 136 is contracted, the rotary screen 27 can be released via the slide frame 135. 27 can be brought into contact with the impression cylinder 100. In the present embodiment, such a slide frame 135, an actuator 136, and the like constitute a liquid supply cylinder retreating unit.

As shown in FIG. 1, a transfer cylinder 26e contacts the downstream side of the rotary screen 27 of the impression cylinder 100 of the screen printing unit 20e in the rotation direction. The transfer cylinder 28 of the drying unit 20f is in contact with the transfer cylinder 26e downstream of the impression cylinder 100 in the rotation direction. Transfer cylinder 2
A drying lamp 29 for irradiating ultraviolet rays (UV) is provided downstream of the transfer cylinder 26e in the rotation direction.

A discharge cylinder 31 of a discharge section 30 is in contact with the transport cylinder 28 of the drying unit 20f on the downstream side in the rotation direction from the drying lamp 29. A sprocket 32 is provided on the paper discharge cylinder 31 so as to be coaxial and integrally rotatable. Further, the paper discharge unit 30 is provided with a paper discharge table 35. A sprocket 33 is provided above the paper output tray 35.
Is provided. Between the sprockets 32 and 33, a paper output chain 34 having a plurality of paper output claws (not shown) attached at predetermined intervals is stretched.

When performing offset printing and screen printing using the printing machine configured as described above, first, the impression cylinder 100 of the screen printing unit 20e is used.
The screw shaft 126 is rotated to retract the holding claw 123 into the notch 111a of the body 111 as described above, and the actuator 134 is contracted to move the cam plate 133 into the storage groove 20eb of the frame 20ea. The actuator 136 is contracted to bring the rotary screen 27 into contact with the impression cylinder 100.

Subsequently, the suction pump is operated, printing is started, and the sheets 1 sent out one by one from the sheet supply table 11 of the sheet supply section 10 onto the feeder board 12 are moved by the swing device 13. The ink is transferred from the ink supply device 24a and the water supply device 25a of the first offset printing unit 20a to the plate cylinder 23a while the ink is transferred to the impression cylinder 21a of the first offset printing unit 20a of the printing unit 20.
When the sheet 1 is supplied from the plate cylinder 23a to the blanket cylinder 22a, the sheet 1 is transferred with ink from the blanket cylinder 22a and subjected to printing of the first color, and then is transferred to the blanket cylinder 26a via the transfer cylinder 26a. The second offset printing unit 20b transfers the second color to the impression cylinder 21b of the two offset printing unit 20b, and prints the second color in the second offset printing unit 20b in the same manner as the first offset printing unit 20a. The third and fourth colors are printed in the offset printing units 20c and 20d and transferred to the transfer cylinder 26d.

When the gripper device 26d1 of the transfer cylinder 26d to which the sheet 1 has been transferred approaches the head 117 of the impression cylinder 100 of the screen printing unit 20e, the connecting shaft 104 communicating with the suction port 117a of the head 117 is provided. Is separated from the connection groove 108b of the sleeve 108, and the communication hole 104c between the air muffler 110 and the connection shaft 104 is formed.
And the connection hole 104a of the connecting shaft 104 communicating with the suction port 117a of the head 117 communicates with the connection groove 108a of the sleeve 108, and the suction pump operates to operate the suction port of the head 117. While the air is sucked from the 117a, the claw device 2 of the transfer cylinder 26d
6d1 releases the grip of sheet 1
Is sucked and held by the head 117 of the impression cylinder 100, and the transfer cylinder 2
It is delivered to the impression cylinder 100 from 6d.

The impression cylinder 10 of the screen printing unit 20e
The sheet 1 transferred to the printing paper 0 is printed on the rotary screen 27 with the special ink or the like in a thick embossed manner as described above. At this time, the impression cylinder 100 holds the sheet 1 by the suction force of the head 117, and
3 is stored in the notch 111a of the body 111, so that it does not interfere with the rotary screen 27.

The sheet 1 is rotated by the rotary screen 27.
After the embossing printing is performed on the
When the member 17 approaches the gripper device 26e1 of the transfer drum 26e, the gripper device 26e1 of the transfer drum 26e grips the sheet 1, while the connection hole 104a of the connecting shaft 104 communicating with the suction port 117a of the head 117 is connected to the sleeve. 108, the communication with the suction pump is cut off, the suction of the air from the suction port 117a of the head 117 is stopped, and the connection shaft 104 of the head 117 is communicated with the suction port 117a. The connection hole 104b communicates with the connection groove 108b of the sleeve 108, and the air muffler 1
Since the pressure between the pressure roller 10 and the suction port 117a of the head 117 is returned to the atmospheric pressure, the sheet 1 is released from the suction holding by the head 117 of the impression cylinder 100, and is transferred from the impression cylinder 100 to the transfer cylinder 26e. It is.

The sheet 1 transferred to the transfer cylinder 26e is transferred to the transfer cylinder 28 of the drying unit 20f, and the printed special ink or the like is dried by UV from the drying lamp 29. Delivered to the delivery cylinder 31 of the delivery section 30;
The paper is conveyed by the traveling movement of the paper discharge chain 34 via the paper discharge claw, and is discharged onto the paper discharge table 35.

In such a printing press, as described above, the impression cylinder 10 of the screen printing unit 20e is used.
0 is the gripper 123 with the notch 111 of the body 111.
a in order to hold the sheet 1 while holding the sheet 1
There is no interference with the rotary screen 27.

Therefore, according to the above-described printing machine, thick printing of special ink or the like by the rotary screen 27 can be performed on the sheet 1 in a satisfactory manner.

In the case where one of the heads 117 does not contribute to the suction holding of the sheet 1 due to the size of the sheet 1 in the width direction, the sheet 1
Screw 115 of the head 117 which is not involved in the suction holding of
Is rotated, and the suction port 11 of the head 117 is
By closing 7a, there is no waste in suction by the suction pump, and the suction force can be improved.

On the other hand, when the screen printing is unnecessary and only the offset printing is performed, the screw shaft 126 of the impression cylinder 100 of the screen printing unit 20e is rotated, and the body 111 of the cylinder main body 111 is rotated as described above. The claw 123 in the notch 111a is projected, and the actuator 134 is extended to extend the cam surface 1 of the cam plate 133.
The cam plate 133 is made to protrude from the storage groove 20eb of the frame 20ea so as to abut the cam follower 132, while the actuator 136 is extended and the rotary screen 27 is separated from the impression cylinder 100 and retracted.

Subsequently, when the operation of the suction pump is stopped and printing is started, the sheet 1 of the paper feeding unit 10 is
After passing through the first to fourth offset printing units 20a to 20d of the printing unit 20 and printing the first to fourth colors and being transferred to the transfer cylinder 26d in the same manner as described above, the transfer cylinder The holding claw device 26d1 of the transfer cylinder 26e is replaced by the holding claw 123 of the impression cylinder 100 of the screen printing unit 20e from the holding claw device 26d1 of the screen printing unit 20e, and the screen printing is not performed from the rotary screen 27.
It is changed to 6e1. At this time, the rotary screen 27 of the screen printing unit 20e is
00, the gripper 12 of the impression cylinder 100
Even if 3 protrudes, there is no damage. The transfer cylinder 26
The sheet 1 delivered to e is delivered to the drying unit 20f, and is subsequently discharged to the paper discharge unit 30 in the same manner as described above.

That is, the delivery of the sheet 1 by the suction holding means takes a longer time than the delivery of the sheet 1 by the grip holding means, and the delivery of the sheet 1 by the suction holding means is a rate-determining step of printing. Therefore, when the screen printing is unnecessary, the suction holding means of the impression cylinder 100 of the screen printing unit 20e can be switched to the holding means to improve the printing speed.

Therefore, according to the above printing machine, the printing speed when screen printing is unnecessary can be improved, and the production efficiency can be improved.

[Second Embodiment] A second embodiment of a printing press in which the liquid supply device according to the present invention is applied to a screen printing unit will be described with reference to FIG. FIG. 17 is an enlarged view of the screen printing unit of the printing press. However, the same members as those in the first embodiment described above are denoted by the same reference numerals as those used in the description of the first embodiment, and the description thereof is omitted.

As shown in FIG. 17, the notch 111 a of the body 111 of the impression cylinder 100 of the screen printing unit 20 e is covered with a cover 120. The cover 120 has an arc shape having the same curvature as the trunk body 111 so that the outer peripheral surface of the trunk body 111 is continuous, and has a cutout groove for allowing the holding claws 123 to appear and disappear, and the transfer cylinder 26d, 26e and a notch groove for exposing the head 117 so that the sheet 1 can be transferred, and the transfer cylinder 2
Notch grooves are formed to avoid interference with the gripper devices 26d1 _and 26e1 of the 6d and 26e.

In such a printing press, as described above, when screen printing is performed by the screen printing unit 20e, the notch 111a of the cylinder main body 111 of the impression cylinder 100 is covered with the cover 120. Because
The squeegee 27c of the rotary screen 27 is the body 1
11 can be reliably prevented from falling into the notch 111a.

Therefore, according to the present embodiment, it is possible to more reliably perform good thick printing of the special ink or the like on the sheet 1 using the rotary screen 27.

In the first and second embodiments described above, each opening / closing plate 116 in the mounting groove 114a of each holder 114 provided in the notch 111a of the body 111 of the impression cylinder 100 is screwed with a screw 115. By turning each at
The suction range corresponding to the size of the sheet 1 is set. However, instead of the opening / closing plate 116 and the screw 115, the suction range is set.
For example, the other end of the hose 119 is branched and directly connected to each holder 114, and the hose 11 is branched.
By providing an open / close valve on the other end side of 9, it is also possible to set whether or not each head 117 is sucked. Here, if the suction or non-suction of the heads 117 located at the same position from the center in the width direction of the sheet 1 can be set by the same on-off valve, the time required for the setting can be halved.

In the first and second embodiments described above, the first to fourth offset printing units 20a to 20d
The screen printing unit 20e and the drying unit 20f are arranged on the downstream side of FIG.
As shown in the figure, the first to fourth offset printing units 20a
19d, a screen printing unit 20e and a drying unit 20f are arranged on the upstream side of the first and second offset printing units 20a and 20b and the third and fourth offset printing units 20c and 20d as shown in FIG. Screen printing unit 20e and drying unit 2 between
It is also possible to arrange 0f.

In the first and second embodiments described above, a case where the present invention is applied to a printing machine in which the offset printing units 20a to 20d and the screen printing unit 20e are combined has been described. For example, FIG. As described above, there is no offset printing unit, and the present invention can be applied to a screen printing machine including a paper feeding unit 10, a screen printing unit 20e, a drying unit 20f, and a paper discharging unit 30, or a processing unit other than a printing unit such as a rotary punching machine. It is also possible to combine them.

In the first and second embodiments described above, the case where special ink or the like is put into the ink fountain 27b of the rotary screen 27 of the screen printing unit 20e to perform thick printing is described. The liquid is supplied from the liquid supply cylinder to the sheet-like material held by the impression cylinder, for example, in a case where a varnish or the like is put in an ink fountain of a rotary screen and a varnish is applied to a sheet as a coating device. In such a case, it can be applied in the same manner as in the case described above.

[0066]

The liquid supply apparatus according to the present invention has an impression cylinder having a sheet-like material holding means rotatably supported and holding a sheet-like article, and is held by the impression cylinder in contact with the impression cylinder. In a liquid supply device including a liquid supply cylinder that supplies liquid to the sheet-like material, the sheet-like material holding unit of the impression cylinder sucks and holds the sheet-like material, and the sheet-like material A gripper having grippers for holding the gripper, and gripper retracting means for retracting the gripper of the gripper holding means into the impression cylinder. By retracting the sheet-like object inside the impression cylinder and sucking and holding the sheet-like material by the suction holding means, it is possible to prevent interference between the impression cylinder and the liquid supply cylinder. To It can be satisfactorily performed Te.

Further, since the liquid supply cylinder retracting means for moving the liquid supply cylinder toward and away from the impression cylinder is provided, if the supply of the liquid to the sheet-like material becomes unnecessary due to convenience, The liquid supply cylinder is separated from the impression cylinder by the liquid supply cylinder retreating means, and the gripper of the gripping holding means is pulled out from the inside of the impression cylinder, and the sheet is held by the gripping holding means from the suction holding of the sheet-like material by the suction holding means. By switching to holding of the sheet-like object, the sheet-like object can be delivered at a high speed while preventing the liquid supply cylinder from being damaged by the holding claws, and the production efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is an overall schematic configuration diagram of a first embodiment of a printing press in which a liquid supply device according to the present invention is applied to a screen printing unit.

FIG. 2 is an enlarged enlarged view of an arrow II in FIG. 1;

FIG. 3 is an enlarged view of an arrow III in FIG. 1;

FIG. 4 is an enlarged enlarged view of the shaft end side of the impression cylinder of the screen printing unit.

FIG. 5 is a sectional view of FIG. 4;

FIG. 6 is a view as seen from the direction of arrow VI in FIG. 5;

FIG. 7 is a sectional view taken along line VII-VII of FIG. 5;

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a schematic configuration diagram of an end surface portion of an impression cylinder of the screen printing unit.

10 is an extracted enlarged schematic configuration diagram of an arrow X part in FIG. 9;

11 is a view as seen from the direction of arrow XI in FIG. 10;

FIG. 12 is an internal structural diagram of a portion indicated by an arrow XII in FIG. 11;

FIG. 13 is an operation explanatory view of FIG. 9;

FIG. 14 is an explanatory enlarged explanatory diagram of an arrow XIV part in FIG. 13;

15 is a view as seen from the direction of arrow XV in FIG. 13;

FIG. 16 is an enlarged enlarged view of an arrow XVI part in FIG. 15;

FIG. 17 is an extracted enlarged view of a screen printing unit according to a second embodiment of the printing press in which the liquid supply device according to the present invention is applied to a screen printing unit.

FIG. 18 is an overall schematic configuration diagram of another embodiment of a printing press in which the liquid supply device according to the present invention is applied to a screen printing unit.

FIG. 19 is an overall schematic configuration diagram of another embodiment of a printing machine in which the liquid supply device according to the present invention is applied to a screen printing unit.

FIG. 20 is an overall schematic configuration diagram of another embodiment of a printing press in which the liquid supply device according to the present invention is applied to a screen printing unit.

[Explanation of symbols]

 Reference Signs List 1 sheet 10 paper feed unit 11 paper feed table 12 feeder board 13 swing unit 20 printing unit 20a to 20d first to fourth offset printing unit 20e screen printing unit 20ea frame 20eb storage groove 20f drying unit 21a to 21d impression cylinder 22a to 22d blanket cylinder 23a to 23d plate cylinder 24a to 24d ink supply device 25a to 25d water supply device 26a to 26e transfer cylinder 26d1, 26e1 holding claw device 27 rotary screen 27a hollow cylinder 27b ink jar 27c squeegee 28 transport cylinder 29 drying lamp 30 discharge Paper section 31 Paper discharge cylinder 32, 33 Sprocket 34 Paper discharge chain 35 Paper discharge table 100 Impression cylinder 101 Fixing ring 102 Bearing 103 Rotary shaft 103a Communication hole 104 Connection shaft 104a, 104b Connection hole 104c Communication hole 1 5 Pipe 106 Connector 107 Outer cylinder 107a, 107b Connection hole 108 Sleeve 108a, 108b Connection groove 109 Hose 110 Air muffler 111 Body 111a Notch 112 Spoke 113 Pipe 113a Communication hole 114 Holder 114a Communication hole 114b Mounting groove 115 Screw 116 Plate 117 Head 117a Suction port 118 Pipe 119 Hose 120 Cover 121 Shaft 122 Claw holder 123 Holding claw 124 Pinion 125 Cam plate 125a, 125b Corner 125c Cam surface 126 Screw shaft 127 Moving nut 128 Support pin 129 Lever 130A Rack 130 Rack Rack 132 Cam follower 133 Cam plate 133c Cam surface 134 Actuator 135 Slide frame 136 Actuator Yueta

Claims (3)

[Claims] An impression cylinder having a sheet-like material holding means rotatably supported to hold a sheet-like article, and a liquid supplied to the sheet-like article held by the impression cylinder in contact with the impression cylinder. A liquid supply device comprising: a liquid supply cylinder, wherein the sheet-like material holding means of the impression cylinder comprises: a suction holding means for sucking and holding the sheet-like material; and a gripper having a gripper for gripping the sheet-like material. A liquid supply device comprising: a holding means; and a holding claw retracting means for retracting the holding claw of the holding means into the inside of the impression cylinder. 2. The liquid supply device according to claim 1, further comprising a liquid supply cylinder retracting unit that moves the liquid supply cylinder toward and away from the impression cylinder. 3. The gripper of the gripper holding means according to claim 1, wherein the gripper claw retreating means includes a cam plate rotatably supported, a cam plate rotating means for rotating the cam plate, and the gripper holding means. A pinion provided on a shaft that supports the cam plate, a lever that is swingably supported, a cam follower that is provided on one end side and abuts on a cam surface of the cam plate, and a rack that is formed on the other end side and meshes with the pinion; A liquid supply device comprising: