JPS6229229B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flat plate multicolor intaglio printing machine. Various types of intaglio printing machines have been known in the past, but their structures and operations are complicated, making them inefficient for printing a wide variety of small quantities, and all of them are equipped with an ink pan, making them more difficult to operate than necessary. The drawback is that it requires a large amount of ink and is not economically desirable.

This invention has been made in view of the above circumstances, and provides a flat plate multicolor intaglio printing machine that is easy to plate, uses a small amount of ink, has high work efficiency, and is suitable for printing a wide variety of products in small quantities. The purpose is to

That is, the present invention includes a bed on which a plurality of flat intaglio plates are placed, a pedestal mounted so as to be movable on the bed, a means for making the pedestal run as appropriate, and a means rotatably provided on the pedestal and capable of moving the pedestal. An impression cylinder that rotates appropriately as it travels, a pressure means that applies printing pressure between the impression cylinder and the flat plate intaglio, and a plurality of doctors that are provided on the pedestal and protrude radially, and As the mount moves, this doctor rotates correspondingly to each flat intaglio plate, and when each doctor is applied to the corresponding flat intaglio surface, doctor pressure is applied to the flat intaglio plate surface. The present invention provides a flat plate multicolor intaglio printing machine characterized by comprising a pressure means.

The present invention will be described below with reference to illustrated embodiments. As shown in FIGS. 1 and 2, the flat plate multicolor intaglio printing press according to the present invention generally comprises a bed 1, a pedestal 2 running on the bed 1, and a drive operation mechanism 3. The bed 1 is equipped with four surface plates 4 on which four flat intaglio plates are placed so that printing can be performed in, for example, four colors. This surface plate 4 is provided with a large number of vacuum suction holes 4', so that the flat intaglio plate can be suctioned and fixed in conjunction with a vacuum suction device (not shown).

Traveling racks 5 are provided on both sides of the bed 1 along the longitudinal direction of the bed 1, and a rack 5 is provided on both sides of the bed 1.
It is designed to run upwards. Furthermore, an impression cylinder rack 7 is provided on one side of the bed 1 along the traveling rack 5, and as will be described later, the impression cylinder 6 mounted on the pedestal 2 is moved as the pedestal 2 moves. It is designed to rotate as appropriate. On the right side of each surface plate 4, a Molton roller 10 for wiping off ink adhering to the doctor blade 9 of the rotating doctor blade 8 is provided, as will be described later. Further, a rotating roller 11 is provided on the left side of each surface plate 4, and this rotating roller 11 is appropriately engaged with a doctor rotating geneva 12 for rotating the rotating doctor 8 by 90 degrees. However, the doctor 9 can be sequentially replaced and applied to four flat intaglio plates. In addition, 13 is a tank for a vacuum pump.

On the other hand, the pedestal is movably supported on the bed 1 by a roller follower 14 provided below. The pedestal 2 is provided with a shaft 16 having a rotational drive source 15, and is configured to run on the running rack 5 of the bed 1 via a running gear 17 provided on the shaft 16. Further, an impression cylinder 6 having a blanket 18 affixed to its circumferential surface is provided on the pedestal 2, with both ends of its impression cylinder shaft 19 being pivotally supported by impression cylinder shaft supports 20. The impression cylinder 6 is connected to the bed 1 via an impression cylinder gear 21 provided at one end of the impression cylinder shaft 19.
The impression cylinder rack 7 is engaged with the impression cylinder rack 7, and rotated as the pedestal 2 moves. A hydraulic cylinder 22 is provided above the impression cylinder shaft receiver 20, and its operation lowers the impression cylinder shaft receiver 20 toward the surface plate 4, whereby the impression cylinder 6 is placed on the surface plate 4. When the printing plate is placed on top of a flat intaglio plate, a printing pressure can be applied between the impression cylinder 6 and the flat intaglio plate. At this time, the impression cylinder rack 7 also descends at the same time as the impression cylinder shaft receiver 20, but due to a spring (not shown) interposed between the impression cylinder rack 7 and the bed 1, the hydraulic cylinder 22 stops operating. As a result, each of the above parts is restored to its original position.

Further, on the pedestal 2, adjacent to the right side of the impression cylinder 6, a rotating doctor 8 is pivotally supported by a doctor shaft 23. The rotating doctor 8 includes a doctor support ring 24 fixed to a doctor shaft 23 and a fixing bolt 2.
The main structure includes four doctors 9, which are removably fixed by a doctor support ring 24 and arranged radially at equal intervals around the periphery of the doctor support ring 24.

The rotating doctor 8 is rotated by 90 degrees by a rotating mechanism which will be explained below, so that the doctor 9 can be changed and used as appropriate for the four flat intaglio plates. The mechanism for this rotation includes a rotation roller 11 provided on the left end of the surface plate 4, a doctor rotation Geneva 12 provided on the pedestal 2 and engaged with the rotation roller 11, and A Geneva gear 27 that is integral with the Geneva 12; an intermediate gear 28 that is provided on the pedestal 2 and engages with the Geneva gear 27; and a doctor that is provided integrally with the doctor shaft 23 and engages with the intermediate gear 28. It consists of a gear 29 for use. The doctor rotating Geneva 12 has four grooves 30 cut out radially at equal intervals, and as the pedestal 2 moves,
When the rotating roller 11 engages with the groove 30, the doctor rotating geneva 12 is moved by the running stress of the pedestal 2.
It rotates 90 degrees, and the rotational moment generated at this time is transmitted to the doctor gear 29 via the Geneva gear 27 and the intermediate gear 28, so that the rotating doctor 8 also rotates 90 degrees at a time between the surface plates. It will turn around. In this way, for the four flat plate intaglios, the corresponding four doctors 9 are sequentially applied.
Can be applied interchangeably.

The rotating doctor 8 is further adapted to apply doctor pressure to the flat intaglio surface when the doctor 9 is applied to the flat intaglio surface by means of a pressure mechanism to be described below. The mechanism for applying this doctor pressure is provided with a controllable swing motor 36 at one end of the doctor shaft 23 of the rotating doctor 8, which operates in conjunction with the doctor shaft 23 when the doctor 9 is applied to the flat intaglio surface. Doctor pressure is applied by applying rotational moment to 23.

The rotating doctor 8 has a brake shoe 31 pressed against the circumferential wall of the doctor shaft 23 via a brake wheel 34. This allows the Geneva 12 to steadily rotate the rotating doctor 8 intermittently, and at the same time, the doctor 9 can rotate against the flat plate. After the appropriate doctor pressure is applied to the intaglio surface, the angle of the doctor 9 with respect to the flat intaglio surface is maintained constant. Reference numeral 32 is a shaft to which the brake shoe 31 is pivoted, and reference numeral 33 is a brake adjustment handle for adjusting the strength of the brake shoe 31. Further, reference numeral 35 indicates a manual handle for rotating the doctor.

Next, a description will be given of the operation when printing is performed using the flat plate multicolor intaglio printing machine configured as described above. First, a plate corresponding to each color is placed on each surface plate 4 at a predetermined position, and the vacuum suction hole 4'
to fix the plate tightly. Next, the material to be printed is placed on the blanket 18 of the impression cylinder 6 in the paper setting device 26 installed on the impression cylinder 6, and then ink is placed on the plate by any means such as coating or spraying. Next, the rotational drive source 15 provided on the pedestal 2 is started to move the pedestal 2 to the right. At this time, the shaft of the swing motor 36 and the doctor shaft 2
3 is connected, the doctor 9 is slightly rotated in the direction of the printing plate, doctor pressure is applied on the first printing plate, and as the pedestal 2 moves, excess ink on the printing plate is wiped away. Next, the hydraulic cylinder 22 is operated to lower the impression cylinder 6 in the direction of the plate, and the impression cylinder rack 7 rotates the impression cylinder 6, so that the printing material wrapped around the blanket 18 is pressed against the plate surface. The printer rotates in the same position and prints. The printing pressure in this case can be adjusted as appropriate using a relief valve or a pressure reducing valve (not shown) connected to the hydraulic cylinder 22.

When printing of the first color is completed in this way,
When the operation of the swing motor 36 is stopped, the connection with the doctor shaft 23 is broken, and at the same time the operation of the hydraulic cylinder 22 is also stopped, and the impression cylinder 6 is moved by the spring interposed between the impression cylinder rack 7 and the bed 1. It rises due to the elasticity of (not shown) and returns to its original position. On the other hand, after the tip of the doctor 9 comes into contact with the Molton roller 10 and the adhering ink is wiped off, the rotating doctor 8 is rotated by the operation of the Geneva 12.
Turn 90°. In this state, the pedestal 2 is stopped until the surface to be printed is dried. Note that drying of the surface to be printed may be accelerated by providing a heating drying device on the impression cylinder 6 or the surface plate 4 or the like.

When the printing surface has finished drying, the pedestal 2 is moved to the right by starting the rotational drive source 15 again.
Printing of the second color is performed by repeating the above operations. In this way, when printing of the fourth color is completed, the printing medium is removed from the blanket 18, the pedestal 2 is moved to the left by the rotational drive source 15, returns to the initial position, and the next printing starts. be done.

As detailed above, the flat plate multicolor intaglio printing machine according to the present invention is easy to plate, and since it does not use an ink pan, the amount of ink used is small.
Furthermore, since the structure and operation are simple, it is extremely preferable as a printing machine for printing a wide variety of small quantities.

[Brief explanation of the drawing]

The drawings show a specific example of a flat plate multicolor intaglio printing machine according to the present invention; FIG. 1 is a side view schematically showing the entire device, FIG. 2 is a plan view of the device shown in FIG. 1, and FIG. 4 is an enlarged side view of the rotating doctor section, FIG. 5 is a sectional view taken along the - line in FIG. 4, and FIG. 6 is a partially cutaway side view of the impression cylinder. FIG. 7 is a side view illustrating the state of engagement with the rotating doctor, and FIG. 7 is a sectional view taken along the - line in FIG. 6. In the figure, 1...bed, 2...mount, 3...drive operation mechanism, 4...surface plate, 4'...vacuum suction hole, 5
...Traveling rack, 6...Impression cylinder, 7...Rack for impression cylinder, 8...Swivel doctor, 9...Doctor, 10
... Molton roller, 11 ... Rotating roller, 12
... Geneva for doctor rotation, 13 ... Vacuum pump, 14 ... Roller follower, 15 ... Rotation drive source, 16 ... Shaft, 17 ... Travel gear, 1
8...Blanket, 19...Impression cylinder shaft, 2
0...Impression cylinder shaft receiver, 21...Impression cylinder gear, 2
2... Hydraulic cylinder, 23... Doctor shaft, 24
... Doctor support ring, 25 ... Fixing bolt, 26
...Paper biting device, 27...Gear for Geneva, 28...
Intermediate gear, 29...Doctor's gear, 30...
Groove, 31...Brake shoe, 32...Shaft, 33
... Brake adjustment handle, 34 ... Brake wheel, 35 ... Manual handle for doctor rotation, 3
6... Swing motor.

Claims (1)

[Scope of Claims] 1. A bed on which a plurality of flat intaglio plates are placed, a pedestal provided to be able to run on the bed, and a rotating shaft provided on the pedestal and protruding radially around the rotating shaft. A revolving doctor which rotates via rollers provided on the bed as the pedestal moves, and thereby sequentially applies each of the doctors to each flat plate intaglio. A flat plate multicolor intaglio printing machine characterized by comprising: a swing motor connected to one end of a rotating shaft of the rotary doctor and applying doctor pressure to a corresponding flat plate intaglio surface. 2. The rotating doctor consists of a doctor shaft supported on a pedestal, a doctor support ring fixed to the doctor shaft, and a plurality of doctors removably fixed radially at equal intervals around the periphery of the doctor support ring. A flat plate multicolor intaglio printing machine according to claim 1, characterized in that: 3. Claim 1, characterized in that the rotating doctor is rotated by the rotational moment generated by the engagement between the rotating rollers provided on the bed and the doctor rotating Geneva provided on the pedestal. The flat plate multicolor intaglio printing machine described in Section 1. 4. Claim 1, characterized in that each flat intaglio plate placed on the bed is fixed by suction on a surface plate provided on the bed and provided with a large number of vacuum suction holes. The flat plate multicolor intaglio printing machine described. 5 A bed on which a plurality of flat intaglio plates are placed, a pedestal provided to be able to run on the bed, a rotating shaft provided on the pedestal, and a plurality of doctors protruding radially around the rotating shaft. and a revolving doctor which rotates via rollers provided on the bed as the pedestal moves, thereby sequentially applying each of the doctors to each flat intaglio plate; A swing motor connected to one end of the rotating shaft and applying doctor pressure to the corresponding flat intaglio surface, and a Molton roller near the end of the bed of each surface plate for wiping off ink adhering to the doctor. Features a flat plate multicolor intaglio printing machine.