JPH0999541A - Printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing machine capable of exchanging a machine plate in a short time. SOLUTION: A plate cylinder 3 supported by a side frame 4 is formed of a cylinder barrel 10 and a semi-circular machine plate support body 11 to be attached to the outer periphery of the cylinder barrel. The machine plate support body 11 is detachably attached in the axial direction of the cylinder barrel 10. At the time of printing, a machine plate to be used next time is attached to the machine plate support body 11 so as to prepare for changing. After the printing is completed, the machine plate support body 11 is changed and printing work is continued.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing machine.

[0002]

2. Description of the Related Art Generally, in a printing machine, a printing plate is attached to a plate cylinder for printing. The plate is attached using the magnetic force of a magnet, the plate is attached to the plate cylinder with double-sided adhesive tape, or both ends of the plate are held by a pair of clamps provided on the plate cylinder. The method has been adopted.

[0003]

By the way, in the conventional printing press, since the printing plate is directly attached to the plate cylinder, the used printing plate is removed after the printing operation is completed.
The plate to be printed next needs to be wrapped around the plate cylinder and fixed, which requires time to replace the plate and cannot adequately support printing of small lots of various types. It was

Further, after the replacement of the printing plate, it is necessary to adjust the position of the new printing plate, and since the adjustment is a work in a narrow space, the adjustment is extremely difficult.

An object of the present invention is to provide a compact printing machine capable of efficiently exchanging a printing plate in a short time.

[0006]

In order to solve the above problems, according to the present invention, in a printing machine in which a plate cylinder is rotatably supported by a side frame, the plate cylinder is
It consists of a cylinder body supported by a side frame and a semi-cylindrical plate support whose inner diameter surface is along the outer diameter surface of the cylinder body. This plate support is detachably attached in the axial direction of the cylinder body. The side frame has an opening for inserting and removing the plate support.

As a method for detachably mounting the plate support in the axial direction of the cylinder body, two guide grooves extending in the axial direction are formed at positions opposite to the outer periphery of the cylinder body, and one guide groove is provided at one end in the circumferential direction of the plate support. A guide plate to be inserted into the guide groove, and a plate spring that presses the side surface of the other guide groove to the other end in the circumferential direction of the plate support, and then insert and remove the plate spring and the guide plate along the guide groove. A configuration can be adopted.

Instead of the leaf spring, a guide plate whose inner end is inserted into the other guide groove is movably attached to the other end of the plate support in the circumferential direction, and the guide plate is guided by the spring. It may be pressed against the side surface of the groove.

[0009]

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

As shown in FIG. 1, the printing unit 1 comprises an impression cylinder 2 and a plate cylinder 3, and both cylinders 2 and 3 are rotatably supported by a side frame 4.

Here, the impression cylinder 2 may be a single one whose outer diameter dimension is constant over the entire length in the axial direction. In the figure, a semi-cylindrical tubular body 6 is attached to the outer peripheral surface of the cylinder barrel 5 supported by the side frame 4 so that the tubular body 6 can be attached and detached in the axial direction of the cylinder barrel 5.

That is, two guide grooves 7a, 7b extending in the axial direction are formed on the outer diameter surface of the cylinder body 5 at intervals of about 180 °, and a guide plate 8 is attached to one end of the cylindrical body 6 in the circumferential direction. Then, the inner part is slidably inserted into the one guide groove 7a. A leaf spring 9 is attached to the other end of the tubular body 6 in the circumferential direction, and the tip end of the leaf spring 9 is attached to the other guide groove 7
The cylindrical body 6 is inserted into the cylindrical body 6b, and its tip portion presses the side surface of the guide groove 7b to stabilize the attachment of the cylindrical body 6.

As shown in FIGS. 1 and 3, the plate cylinder 3 includes a cylinder cylinder 10 rotatably supported by a side frame 4, and a half-cylindrical plate support mounted on the outer circumference of the cylinder cylinder 10. It consists of body 11.

Two guide grooves 12a and 12b are formed on the outer periphery of the cylinder body 10 at intervals of about 180 °.

On the other hand, a guide plate 13 is attached to one end of the plate support 11 in the circumferential direction, and the guide plate 13 is slidably inserted into one guide groove 12a of the cylinder body 10. A leaf spring 1 is provided at the other end of the plate support 11 in the circumferential direction.
4 is attached, and the tip of the leaf spring 14 is inserted into the other guide groove 12b.

The plate support 11 is mounted such that the inner surface of the plate support 14 is in close contact with the outer surface of the cylinder body 10 by the action of the tip of the leaf spring 14 pressing the side surface of the other guide groove 12b. It can be attached and detached in the axial direction.

As shown in FIG. 1, an opening 15 is formed in the side frame 4, and the plate support 11 is opened from the opening 15.
Also, the tubular body 6 of the left torso 2 can be inserted and removed.

As shown in FIGS. 2 and 4, 2 is formed on the rear end surface of the plate support 11 in the mounting direction with respect to the cylinder body 10.
Two projecting pieces 16a, 16b are attached at a required interval in the circumferential direction. One of the protrusions 16a has an adjusting screw 17
Is screwed in, and the tip of the adjusting screw 17 is attached to the cylinder body 1.
It is in contact with the end surface of 0.

A pin support 18 is provided on the end surface of the cylinder body 10.
Is attached via a pin 19 so as to be swingable. When the pin support body 18 is swung in the outer diameter direction of the cylinder body 10, the tip end faces the other projecting piece 16b, and when swung about 90 ° from that, the pin supporting body 18 is positioned with respect to the projecting piece 16b. The misalignment of the printing plate 11 does not interfere with the attachment / detachment of the plate support 11.

A pin hole 20 is formed at the tip of the pin support 18, and a pin 21 and the pin 2 are formed in the pin hole 20.
A spring 22 for pressing 1 toward the plate support 11 is incorporated. The pin 21 presses the plate support 11 in the mounting direction via the other projecting piece 16b in a state where the tip of the pin supporting body 18 faces the other projecting piece 16b.
Due to the pressing, the tip of the adjusting screw 17 causes the tip of the cylinder body 1 to move.
The plate support 11 is positioned in the axial direction by abutting on the end surface of 0.

The printing machine shown in the embodiment has the above-mentioned structure, and a plurality of printing plate supports 11 are prepared in advance. When printing, with the cylinder cylinder 10 removed,
The printing plate A is attached to the outer periphery of the plate support 11, and the plate support 11 is attached to the outer periphery of the cylinder body 10 from the opening 15 to start the printing operation.

The printing plate A to be used next during printing
Is attached to the plate support 11 which has been prepared in advance, and after printing the required number of prints, the plate support 11 supported by the cylinder body 10 and the plate support 11 prepared in advance are attached. Replace and start the next print.

As described above, the plate A can be exchanged only by exchanging the plate support 11, and the plate A can be attached to and detached from the plate support 11 during printing. The plate A can be replaced in a very short time.

Here, the plate A can be attached to the plate support 11 by a method of adhering with a double-sided adhesive tape, a method of screwing or the like.

As shown in FIG. 5, a plate mounting plate 23 made of a thin metal plate such as a stainless plate is attached to the outer periphery of the plate support 11 by tightening screws 24 which are screwed into the plate support 11, and the plate is mounted. The plate A may be attached to the plate 23.

In this case, since there is a margin between the screw insertion hole 25 formed in the plate mounting plate 23 and the screw 24, the screw 24 is loosened to move the plate mounting plate 23 within the margin. It is possible to adjust the twist of the plate A with the plate support 11 attached to the cylinder body 10, and it is not necessary to move the plate A itself, so that the plate A is damaged. Nothing.

Further, the plate can be stored with the plate mounting plate 23 removed, and when it is used again,
Since it is only necessary to attach the plate attachment plate 23 to the plate support 11, the plate A can be easily attached.

When the plate A of the plate support 11 mounted on the cylinder body 10 is adjusted left and right, the adjusting screw 17 shown in FIG. 2 is rotated to move the plate support 11 to the cylinder body 10.
Move in the axial direction.

In the example shown in FIG. 3, the plate supporting member 11 is brought into close contact with the outer periphery of the cylinder body 10 by utilizing the elastic force of the leaf spring 14, but as shown in FIG.
A pin 26 is attached to an end face located in the circumferential direction of the guide plate 27, a guide plate 27 is movably attached along the pin 26, and the guide plate 27 is pressed by a spring 28 supported by the pin 26 to move the guide plate 27. Guide groove 12b on the inner diameter end
It may be pressed against the side surface of.

7 and 8 show another example in which the plate support 11 is attached and detached in the axial direction of the cylinder body 10. Figure 7
Attaches a pair of ridges 30 to the outer circumference of the cylinder body 10 at opposite positions, and a guide bar 31 is screwed to one side of the plate support 11, and the ridges 30 are slidable on the inner surface of the guide bar 31. Is formed with a guide groove 32.
Further, a pin 33 is attached to the other side surface of the plate support 11, and a holding bar 34 movably supported along the pin 33.
An engaging ridge 35 that engages with the side surface of the ridge 30 is provided on the inner surface of, and the holding bar 34 is pressed toward the other side surface of the plate support 11 by the spring 36 supported by the pin 33.
The engaging ridge 35 and the other side surface of the plate support 11 elastically sandwich the ridge 30 from both sides.

In FIG. 8, instead of the holding bar 34 shown in FIG. 7, a guide bar 37 is attached to the other side surface of the plate support 11, and a leaf spring 38 is attached to the side surface of the guide bar 37.
The leaf spring 38 presses the side surface of the protrusion 30.

[0032]

Since the present invention is constructed as described above, it has the following effects.

The plate support is detachably attached to the cylinder body, and the plate is attached to the plate support. The plate to be used can be attached and prepared for replacement, and the plate can be replaced efficiently in a short time.

By making the printing plate support detachable from the cylinder body in the axial direction, in a printing machine having a plurality of printing units, adjacent printing units can be arranged close to each other. Can be miniaturized. Further, the printing plate can be adjusted in the horizontal direction and the twist of the printing plate in a wide area where the printing plate support is laterally removed, and the adjustment work can be facilitated.

Since the side surface of the guide groove is pressed by the leaf spring attached to the circumferential end portion of the plate support, it is possible to obtain a stable attachment state in which the plate support is in close contact with the outer periphery of the cylinder body. it can.

Since the guide plate is movably attached to the circumferential end of the plate support and the elastic force of the spring is applied to the guide plate to press the side surface of the guide groove with the guide plate. Similarly, a stable mounting state can be obtained on the printing plate support.

A ridge is provided at a position opposed to the outer periphery of the cylinder body, and a guide groove in which one ridge is slidably fitted on the plate support and a holding bar that elastically presses the side surface of the other ridge are provided. By providing the same, the printing plate support can be stably attached in the same manner as.

A pin support is provided on the end surface of the cylinder body, and the elastic force of a spring is applied to the pin supported by the pin support, and the plate is axially pressed by the pin to support the plate support. Since the tip of the supported adjusting screw is brought into contact with the end surface of the cylinder body, the plate support can be attached at a predetermined position of the cylinder body, and the plate can be easily moved by rotating the adjusting screw. The axial position of the support can be adjusted.

By screwing a plate mounting plate made of a thin metal plate to the outer periphery of the plate support, the plate is twisted on the plate mounting plate with the plate support mounted on the outer periphery of the cylinder body. Adjustments can be made.

[Brief description of drawings]

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

FIG. 2 is an enlarged sectional view showing a part of the plate cylinder of the same.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a sectional view showing a state in which a plate attachment plate is attached to the plate support of the above.

FIG. 6 is a sectional view showing another example of the plate cylinder of the same.

FIG. 7 is a cross-sectional view showing another example of the above plate cylinder.

FIG. 8 is a sectional view showing still another example of the plate cylinder of the same.

[Explanation of symbols]

 3 Plate cylinder 4 Side frame 10 Cylinder cylinder 11 Plate support 12a, 12b Guide groove 13 Guide plate 14 Leaf spring 15 Opening 16a, 16b Adjustment screw 18 Pin support 20 Pin hole 21 Pin 22 Spring 23 Plate attachment plate 24 Screw 25 screw insertion hole 26 pin 27 guide plate 28 spring 30 ridge 31 guide bar 32 guide groove 34 sandwiching bar 35 engaging ridge 36 spring 37 guide bar 38 leaf spring

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B41F 27/14 B41F 13/10 Z

Claims (7)

[Claims] 1. A printing machine in which a plate cylinder is rotatably supported by a side frame, wherein the plate cylinder has a cylinder cylinder supported by the side frame, and a semi-cylindrical shape whose inner diameter surface is along the outer diameter surface of the cylinder cylinder. A printing machine comprising a printing plate support, the printing plate support being detachably attached in the axial direction of the cylinder body, and the side frame having openings for inserting and removing the printing plate support. 2. A means for removably supporting the plate support in the axial direction of the cylinder body is provided with two guide grooves extending in the axial direction at positions opposite to the outer periphery of the cylinder body, and the periphery of the plate support is provided. A guide plate slidably inserted in one guide groove is attached to one end in the direction, and a leaf spring is attached to the other end in the circumferential direction of the support body to press the side surface of the other guide groove in the circumferential direction. Printing machine described in. 3. The printing machine according to claim 2, wherein instead of the leaf spring, a guide plate whose inner end is inserted into the other guide groove is movable with respect to the other end in the circumferential direction of the plate support. The printing machine is characterized in that the guide plate is attached to the side surface of the guide groove by a spring. 4. A means for detachably supporting the plate support in the axial direction of the cylinder body is provided with a ridge extending in the axial direction at a position facing the outer periphery of the cylinder body, and one side surface of the plate support is provided. A guide bar is attached, a guide groove is formed on the inner surface of the guide bar so that the projection is slidably fitted, and a holding bar facing the outer diameter surface of the projection is provided on the other side surface of the plate support. The engaging bar is provided movably with respect to the side surface, and the engaging bar that engages with the side surface of the projecting portion is provided on the inner surface of the nipping bar. The nipping bar is formed by a spring in the direction in which the engaging projecting line engages with the projecting section. The printing machine according to claim 1, wherein the printing machine is pressed. 5. The printing machine according to claim 4, wherein a guide bar is attached in place of the holding bar, and a leaf spring for pushing the side surface of the protrusion is attached to the side surface of the guide bar. . 6. The rear end face in the mounting direction of the plate support is 2
Two protrusions are provided, an adjusting screw is screwed into one of the protrusions so that it can move back and forth with respect to the end face of the cylinder body, and a pin support is attached to the end face of the cylinder body so that it can swing with respect to the other protrusion.
6. The pin according to claim 1, wherein a pin and a spring that presses the pin toward the other projecting piece are incorporated into a pin hole provided at an end portion of the pin support on the swing side. Printing machine. 7. The printing machine according to claim 1, wherein a plate mounting plate made of a metal thin plate having a screw insertion hole is screwed to the outer diameter surface of the plate cylinder support.