JPH01196340A - Printer - Google Patents

Abstract

PURPOSE:To obtain an accurate printed pattern on a material to be printed such as glass or metal plate by allowing a movable member to move linearly with the help of a drive mechanism, and also a printing plate on a transfer part to move to an inking part and a printing part sequentially to achieve a transfer to a transfer roller and at the same time, causing the transfer roller to rotate, interlocked to the linear motion of the movable member. CONSTITUTION:The XYtheta table 8a of a printing part is lifted up by an air cylinder 10a to allow a material to be printed 26 to come into contact with a transfer roller 19. Then, if the movable member is moved, the transfer roller 19 synchronously rotates through pinions 22, 22 which are engaged with a rack 23, and a pattern on the transfer roller 19 is printed on the surface of the mate rial to be printer 26. At that time, the transfer roller 19 rotates synchronously with the movable member 3, because the rack 23 provided integrally with the movable member 3 is engaged with the pinions 22, 22. Subsequently, the slipping action of the transfer roller 19 is prevented and a shift of pattern during transfer and printing is precluded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a printing machine for printing precise patterns on, for example, glass or metal plates.

(Prior Art) Generally, in offset printing, the printing material is paper, and after ink is attached to a printing plate, it is transferred to a transfer roller, and then transferred to the paper. However, when the printing material is paper, the paper absorbs ink and smudges, and the paper expands and contracts due to humidity, making it impossible to print precise patterns. Also, if the printing material is glass or metal plate that does not absorb ink,
Since the transfer roller is generally made of rubber, if the pressure applied during transfer between the roller and the printing material is large, the ink pattern may be crushed, and if the pressure is weak, the pattern may be partially cut off. , It is very difficult to set the pressing force during transfer. Furthermore, when the printing material is glass or metal, it tends to slip on the transfer roller, causing problems such as pattern shift.

(Problems to be Solved by the Invention) As described above, conventional offset printing is unable to print precise patterns and cannot print printed matter that requires precision.

This invention was made in view of the above-mentioned circumstances, and its purpose is to provide a printing machine that can print precise patterns even on glass, metal plates, etc. be.

[Structure of the invention]

(Means and Effects for Solving the Problems) The present invention includes a printing section that includes a transfer section for setting a printing plate on a movable member capable of linear movement, an inking section for kneading ink, and a transfer roller. The movable members are arranged in parallel, and the movable members are linearly moved by a drive mechanism to move the printing plate on the transfer section in the order of the inking section and the printing section and transferred to the transfer roller. The reason is that it is made to rotate.

The linear movement of the movable member moves the printing plate to the inking section, where the ink is applied, and then the plate is moved to the printing section where it is transferred to the transfer roller.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a base, and a guide rail 2 is provided on the upper surface of the base 1 in the longitudinal direction. A movable member 3 is supported on the guide rail 2 so as to be capable of linear reciprocating motion, and is driven by a servo motor 4 as a drive mechanism provided at one end of the base 1. Further, on the upper surface of the movable member 3, a transfer portion 5 and an ink portion 6 are provided in the direction of movement of the movable member 3.
and a printing section 7 are arranged in parallel.

The transfer section 5 includes an XYθ table 8 as a stage, a cross roller table 9 that supports the XYθ table 8, and a first air cylinder 10 that moves the XYθ table 8 up and down. And xYθ
A vacuum chuck (not shown) is provided on the top surface of the table 8, and a printing plate 12 positioned by positioning pins 11 is attracted thereto.

The ink section 6 is supported by a cross roller table 13 similarly to the transfer section 5, and is supported by a second air cylinder 1.
4 allows it to move up and down. Furthermore, a plurality of kneading rollers 15... are disposed above the ink section 6, and the rotating shafts of these kneading rollers 15...
6 is rotatably supported by a frame 17.17 erected on the upper surface of the base 1. A motor 18 is provided at one end of the rotating shaft 16 and is configured to knead the ink supplied by rotationally driving the kneading rollers 15 .

Further, the printing section 7 is supported by the same support structure as the transfer section 5, and is movable in the XYθ directions. Furthermore, a transfer roller 19 is provided above the printing section 7. The transfer roller 19 is supported by a rotating shaft 20, and both ends of the rotating shaft 20 are rotatably supported by mounts 21.21 erected on the base 1. Furthermore, two pinions 22 are provided at one end of the rotating shaft 20.
．． 22 are superimposed with a slight phase shift, and these pinions 22, 22 mesh with a rack 23 installed along the direction of movement of the movable member 3.

Then, as the movable member 3 moves back and forth in a straight line, the rack 23
An interlocking mechanism 24 is configured to synchronously transmit rotational force from the transfer roller 19 to the transfer roller 19 via pinions 22 and 22.

The reason why the two pinions 22 and 22 are superimposed is to prevent backlash and to prevent deviation in the rotation angle of the transfer roller 19.

In addition, 25.25 is a microscope with reference marks attached,
Positioning is performed by aligning with positioning marks attached to the plate 12, and the microscope 25.2
Positioning can be performed by driving the XYθ table 8 while looking through the XYθ table 5.

Next, the operation of the printing press configured as described above will be explained. The printing plate 12 is set on the XYθ table 8 of the transfer section 5, and the mixing roller 1 of the inking section 6 is rotated.
5. Supply ink to... and knead the ink. Next, the stage of the ink section 6 is lifted down by the second air cylinder 14 to provide a space below the kneading rollers 15. In this state, when the movable member 3 is moved in the direction of arrow A by the servo motor 4, the printing plate 12 is moved by the kneading roller 1.
5.15 and a suitable amount of ink is deposited. Next, move the XYθ table 8 of the transfer section 5 to the first air cylinder 1.
When the movable member 3 is moved in the same direction again, the printing plate 12 to which the ink is attached is located below the printing unit 7. Here, the XYθ table 8 is driven while looking through the microscope 25, 25, and the reference mark and the positioning mark on the printing plate 12 are aligned. Then, the XYθ table 8 of the transfer unit 5 is lifted up by the first air cylinder 10, and the printing plate 12 is moved up against the transfer roller 19.
contact. Then, when the movable member 3 is moved again,
The transfer roller 19 is rotated synchronously via a pinion 22.22 meshing with the rack 23, and the pattern of the printing plate 12 is transferred onto the outer peripheral surface of the transfer roller 19.

When the transfer to the transfer roller 19 is completed in this way, the XYθ table 8 of the transfer section 5 is lifted down by the first air cylinder 10a, and the movable member 3 is moved to the arrow B
position the printing material 26 under the transfer roller 19. Here, the XYθ table 8a is driven while looking through the microscope 25, 25, and the reference mark and the positioning mark on the printing medium 26 are aligned. Then, the XYθ table 8a of the printing section 7 is moved to the air cylinder 10a.
to bring the printing material 26 into contact with the transfer roller 19. Then, when the movable member 3 is moved again, the transfer roller 19 is rotated synchronously via the pinions 22 and 22 that mesh with the rack 23, and the transfer roller 19
The pattern is printed on the surface of the printing substrate 26. At this time, since the rack 23 provided integrally with the movable member 3 meshes with the pinion 22.22, the transfer roller 19 rotates in synchronization with the movable member 3, and slipping of the transfer roller 19 can be prevented. It is possible to prevent pattern shift during transfer and printing.

Note that the amount of ink adhered to the printing plate 12, the pressing force of the printing plate 12 against the transfer roller 19, and the transfer roller 1
The pressing force of the printing material 26 against the printing material 9 can be arbitrarily set using an air cylinder, so that it is possible to prevent the pattern from being crushed or cut, and even a precise pattern can be printed clearly.

According to the embodiment, the movable member 3 includes the transfer section 5,
Although the inking section 6 and the printing section 7 are arranged in this order, this arrangement structure is not limited, and printing can be performed in the order of inking, transfer, and printing by reciprocating the movable member.

[Effects of the Invention] As explained above, according to the present invention, the transfer roller rotates in synchronization with the movement of the printing plate to which ink is attached, and the transfer roller rotates in synchronization with the movement of the printing medium. Because of this, non-slip operation occurs during transfer and printing, preventing pattern shift, enabling precise pattern printing, and clear printing even on slip-prone substrates such as glass and metal plates. becomes.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a printing press showing an embodiment of the present invention, and FIG. 2 is a configuration diagram for explaining the same operation. 3... Movable member, 4... Servo motor (drive mechanism)
, 5... Transfer section, 6... Ink section, 7... Printing section, 8... XYθ table, 12... Print plate, 15...
- Kneading roller, 19... Transfer roller, 24... Interlocking mechanism. Applicant's agent Patent attorney Takehiko Suzue

Claims (2)

[Claims] (1) A printing section including a movable member capable of linear movement, a transfer section for setting printing plates arranged side by side in the movable direction on the movable member, an inking section for kneading ink, and a transfer roller;
a drive mechanism that linearly moves the movable member to move the printing plate on the transfer unit in the order of the inking unit and the printing unit and transfers the image to the transfer roller; and a drive mechanism that rotates the transfer roller in synchronization with the linear movement of the movable member. A printing machine characterized by comprising a driving interlocking mechanism. (2) The printing machine according to claim 1, wherein the stages of the transfer section and the printing section are constituted by an XYθ table.