JPS61108554A - Multicolor printing device - Google Patents

Abstract

PURPOSE:To make all of the titled device miniaturize comparing to conventional multicolor printing devices, by a method wherein printing units of which rolled sheet is pulled out in a spiral type and arranged in a diameter direction of a roll supporting axis, and it's printed part is made to pass in a dry box and dry treated. CONSTITUTION:Supporting frames 8 of screens 7 are positioned on guide rollers 5 which guide the shift of the rolled sheet A and support movable to the horizontal direction, and besides, a squeegee 9 for pushing out ink is fixed, and adequate printing is made to conduct on that rolled sheet A, supporting frames 8 being shifted at the same speed to the moving direction of the rolled sheet A. When printing is conducted on the rolled sheet A by printing units, since printing parts pass through inside of a dry box 1, a printing part is dry treated and then transferred to the next printing unit 4. Accordingly, print treating and dry treating of the rolled sheet A are reiterated alternately and printing of color numbers corresponding to the number of the printing units 4 are conducted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a multicolor printing device that prints on a rolled sheet.

[Conventional technology]

When performing multicolor printing on a rolled sheet by screen printing, conventionally, as shown in FIG.
The winding sheet 1- (A) set in the plurality of rolls 1
A plurality of printing units 12 are arranged in the movement path of the winding sheet (A), and the winding sheet (A) is intermittently fed forward by a certain length, and the winding sheet (A) is pulled out horizontally. When A) is stopped, the printing unit 12 is operated to perform printing.

[Problem to be solved by the invention]

However, in the above-described printing apparatus, since it is necessary to dry the printing ink printed by the printing unit 12, a drying box 13 is provided at the rear of each printing unit 12. Therefore, the total length of the printing apparatus is It has the disadvantage that it is long and requires an extremely large space for installation.

The technical object of the present invention is to solve the above-mentioned disadvantages and to downsize a multicolor printing apparatus.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a roll support shaft outside a drying box, and arranges a plurality of printing units in a radial direction approximately centered on the roll support shaft. The set winding sheet is pulled out in a spiral shape and passed through each printing unit, and each time the printing unit performs printing, the sheet is introduced into the drying box to dry the printing ink on the printing sheet. It is.

〔Example〕

FIG. 1 shows a schematic diagram of a multicolor printing apparatus according to the invention. This printing device includes a dry box 1,
A roll support shaft 3 is arranged in a recess 2 formed in the upper center of the drying box 1.

Moreover, above the roll support shaft 3, this roll support shaft 3
A plurality of printing units 4 are arranged in a radial direction centered on .

The winding sheet (Δ bar) attached to the roll support shaft 3 passes through each of the printing units 4, and each of the printing units 4
After passing through the drying box 1, the plurality of idle rollers 5 disposed inside and outside the drying box 1 are pulled out in a spiral shape to enter the drying box 1.
) to guide you through the movement. 6 indicates a sheet insertion hole formed in the top plate of the drying box 1.

The printing device shown in the embodiment has the above structure.

This printing device moves a plurality of roll sheets (~) guided by idle rollers 5 in one direction, prints them in each printing unit 4, and dries them as they move inside a drying box 1. .

Here, as the printing unit 4, an offset printing unit using a single plate cylinder, a screen printing unit using a screen, etc. can be used. In the illustrated embodiment, the latter printing unit is used to guide the movement of the web sheet (A).
are arranged and supported so as to be movable in the horizontal direction, and a squeegee 9 for pushing out ink is fixed, and the support frame 8 is moved at the same speed in the moving direction of the winding sheet (A) to move the winding sheet (A). A) Appropriate printing is applied on top (see Figure 2).

Note that the winding sheet (A) may be moved continuously at a predetermined speed in synchronization with the movement of the support frame 8, or may be moved intermittently for a predetermined length.

When the above-mentioned printing unit 4 prints on the roll sheet (~), the printed part passes inside the drying box 1, so
The printing section is dried and then transported to the next printing unit 4. Therefore, in the winding sheet (A), printing processing and drying processing are repeated alternately, and printing is performed in the number of colors corresponding to the number of printing units 4.

In addition, in the drying process of the printing section, hot air may be sent into the drying box 1 to heat and dry, but since the moving distance of the rolled sheet (Al) between adjacent printing units 4 is long, the drying process is performed at room temperature. You can also do that.

Generally, in a printing device that employs heat drying, the rolled sheet stretches during drying, so it is extremely difficult to align the phases of each printing unit 4, and printing misalignment often occurs.

However, in the present invention, since drying at room temperature is possible, by adjusting the phase of each printing unit 4 in the initial printing state, it is possible to eliminate the inconvenience of printing misalignment caused by the drying process, and It is economical because a hot air generator is not required.

〔effect〕

As described above, according to the present invention, a wound sheet attached to a roll support shaft is drawn out in a spiral shape, printed by a plurality of printing units arranged in the radial direction of the roll support shaft, and the printed portion is dried. Since the drying process is performed by passing the printer through the box, the overall size of the printer can be reduced compared to a conventional multicolor printing device in which a plurality of printing units are arranged in a straight line.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of a multicolor printing apparatus according to the present invention; FIG. 2 is a sectional view showing the same printing unit;
FIG. 3 is a schematic diagram showing a conventional multicolor printing device. 1...Drying box, 3...Roll support shaft, 4...Printing unit

Claims (1)

[Claims] A roll support shaft is provided on the outside of the drying box, and a plurality of printing units are arranged in a radial direction approximately centered on the roll support shaft, and each printing is performed by a winding sheet that is set on the roll support shaft and drawn out in a spiral shape. A multicolor printing device comprising a sheet guide for guiding the movement of a web of sheets through the printing unit and into the drying box after passing through the printing unit.