JP2944897B2 - Rotary screen printing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary screen printer capable of multicolor printing.

[0002]

2. Description of the Related Art Conventionally, this type of screen printing machine is a tandem type in which a plurality of printing units are arranged in series.
Ink drying means is provided between the printing units,
Each printing unit is mainly composed of a screen plate cylinder and an impression cylinder, and a printing medium is sandwiched between the plate cylinder and the impression cylinder, and the impression cylinder and the screen plate cylinder are continuously rotated so that printing is performed while feeding the printing object. Has become.

[0003]

However, in the above-mentioned prior art, the printing object sags under its own weight between the printing units, and in the case of multicolor printing, color / position alignment and timing adjustment are required for each screen plate. The adjustment work is troublesome, the adjustment work takes a lot of time, and a considerable amount of the printed material is sent until the color / position adjustment is completed. ) Occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has as its object to easily adjust the color / position and timing of each screen plate and to reduce the occurrence of waste paper. To provide a rotary screen printing machine.

[0005]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, the present invention provides a printing press frame, a center drum and a driving gear attached to the printing press frame via a support shaft, driving means for rotating and driving the center drum, and a center drum provided on the printing press frame. A plurality of printing units provided at arbitrary intervals in the circumferential direction, and an ink drying unit disposed between the printing units, wherein each of the printing units,
A screen plate cylinder, and an impression cylinder for sandwiching and sending a printing material between the screen plate cylinder, and each impression cylinder and screen for driving the impression cylinder of each printing unit and the screen plate cylinder at the same peripheral speed. The plate cylinder is interlocked with the drive gear.

Further, the present invention is characterized in that the screen plate cylinder is mounted on a printing unit mounting portion provided on a printing machine frame so as to be movable, adjustable and replaceable. Also, the screen plate cylinder should be close to and away from the impression cylinder.
The movable frame supported on the printing press frame
Rotatably supported by multiple support rollers
It is characterized by having . The movable frame is
Between the moving frame and the printing unit
The rack, which is interposed, meshes with the rack and is driven to rotate
The movement can be adjusted by the drive pinion.
It is characterized by .

[0007]

According to the present invention, when the center drum is rotationally driven by the driving means, each impression cylinder is continuously rotated at the same peripheral speed by the driving gear. On the other hand, the printing material is sent from the center drum between the impression cylinder and the screen plate cylinder and is printed. Therefore, between the respective printing units, the printing medium is sent along the center drum and does not sag, so that the color, alignment and timing of each plate can be easily adjusted, and the printing accuracy is improved.

In addition, a plurality of impression cylinders and screen plate cylinders are
Since the rotation is simultaneously performed by the drive gear provided on the center drum, registration in each printing unit is facilitated.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, 1 is a pair of left and right printing press frames,
A support shaft 2 is mounted on a center portion of the frame 1, and a center drum 3 and a drive gear 4 having the same diameter are fixed to the shaft 2 by being fixed thereto, and a sheet is provided along the outer periphery of the center drum 3. The substrate 5 to be printed is guided and transferred. The driving unit 30 that rotationally drives the center drum 3 includes the frame 1
A drive shaft 31 is provided at a lower portion of the drive shaft 31 and rotates in conjunction with a drive source such as a motor (not shown), and a transmission gear 33 that rotates in conjunction with the drive shaft 31 via a transmission gear 32 such as a bevel gear. The transmission gear 33 is meshed with the drive gear 4.

In the frame 1, seven printing unit mounting portions 6A to 6G are provided at arbitrary intervals in the circumferential direction of the drum 3.
Are arranged in a protruding manner, the printing units 7A to 7G are detachably attached to the respective attachment portions 6A to 6G, and ink drying means 8A to 8G are respectively arranged between the printing units 7A to 7G. The printing medium 5 sent from the printing unit 7A goes around the center drum 3 and is sent from the printing unit 7G in a printing completed state.

Each of the printing units 7A to 7G has the same configuration as shown in FIG. 2, and is rotatably mounted on each of the mounting portions 6A to 6G of the frame 1 via a fixed frame 9 and a shaft 10. The intermediate small drum 11 and the intermediate transmission gear 12, the impression cylinder 14 and the transmission gear 15, which are also rotatably mounted on the fixed frame 9 via the shaft 13, and the movable frame 16 which rotates via the plurality of support rollers 17. It comprises a screen plate cylinder 18 supported in a replaceable manner, a synchronous transmission gear 19 concentrically fixed thereto, and an inking means 20 including a squeegee.

The intermediate transmission gear 12 meshes with the drive gear 4 and the transmission gear 15, and a synchronous transmission gear 19 removably meshes with the transmission gear 15. The small drum 11, the impression cylinder 14, and the screen plate cylinder 18 rotate at the same peripheral speed and synchronously. Therefore, the printing substrate 5 is placed on the impression cylinder 14 of each printing stage, that is, each of the printing units 7A to 7G.
And the screen plate cylinder 18 are fed at the same speed and synchronously, and by precisely arranging the screen plate 21 (see FIG. 3) at a fixed position, color / position alignment and timing adjustment are performed with high precision. .

The movable frame 16 having the screen plate cylinder 18 and the inking means 20 of each of the printing units 7A to 7G is provided in the unit mounting portions 6A to 6G so as to be horizontally movable and replaceable. The rack 22 provided downward and horizontally on its side is provided with the mounting portion 6A.
6G, and the movable frame 16 is rotated by rotating the pinion 23.
Is moved forward and backward with respect to the fixed frame 9 on which the impression cylinder 14 is mounted, so that the transmission gear 15 is meshed with the synchronous transmission gear 19, and the printing material 5 is held between the impression cylinder 14 and the screen plate cylinder 18.
At an appropriate pressure.

The printing unit 7 in the final printing stage
In G, transmission gears 24 and 25 are interposed between the intermediate transmission gear 15 and the driving gear 4. The present invention is not limited to the above-described embodiment. For example, the number of the printing units 7A to 7G can be appropriately increased or decreased.

[0015]

As described above, the present invention provides a printing press frame, a center drum and a driving gear attached to the printing press frame via a support shaft, and driving means for driving the center drum to rotate. The printing press frame includes a plurality of printing units provided at arbitrary intervals in a circumferential direction of a center drum, and ink drying means provided between the printing units, wherein each of the printing units includes a screen plate cylinder and a printing plate cylinder. ,
An impression cylinder for sandwiching and sending a printing material between the screen plate cylinder and the impression cylinder and the screen plate cylinder for driving the impression cylinder and the screen plate cylinder of each printing unit at the same peripheral speed. Because it is linked to gears, it is easy to adjust the color, position and timing of each plate of the printing material, improve the adjustment work efficiency and reduce waste paper, and screen Printing accuracy can be improved.

[0016] In addition, the present invention is, exchange of the scan clean version can be easily performed well as exchange of the screen plate cylinder,
Further, it is possible to easily adjust the narrow pressure of the printing medium.

[Brief description of the drawings]

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

FIG. 2 is an enlarged front view of the printing unit in the embodiment.

FIG. 3 is a partially omitted enlarged plan view of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printing machine frame 2 Support shaft 3 Center drum 4 Drive gear 5 Printed material 6A-6G Printing unit mounting part 7A-7G Printing unit 8A-8G Ink drying means 14 Impression cylinder 15 Intermediate transmission gear 16 Movable frame 18 Screen plate cylinder 19 Synchronization Transmission gear 20 Inking means 30 Driving means

Claims (4)

(57) [Claims] 1. A printing press frame, a center drum and a driving gear attached to the printing press frame via a support shaft, driving means for driving the center drum to rotate, and a peripheral portion of the center drum around the printing press frame. A plurality of printing units provided at arbitrary intervals in the direction, and ink drying means provided between each printing unit, wherein each printing unit is a screen plate cylinder, between the screen plate cylinder An impression cylinder that feeds out the printing medium, and that each impression cylinder and the screen plate cylinder are interlocked with the driving gear so as to drive the impression cylinder and the screen plate cylinder of each printing unit at the same peripheral speed. Characterized rotary screen printing machine. 2. The rotary screen printing press according to claim 1, wherein the screen plate cylinder is mounted on a printing unit mounting portion provided on the printing press frame so as to be movable and exchangeable. 3. The screen plate cylinder is located close to and away from the impression cylinder.
It is supported so that it can move and adjust freely to the printing machine frame.
On a movable frame with multiple support rollers
2. The method according to claim 1, wherein
-Tally screen printing machine. 4. The movable frame is printed with the movable frame.
The rack provided between the printing unit
And the drive pinion that meshes with it and is driven to rotate
Therefore, the movement can be adjusted freely.
Item 4. A rotary screen printer according to item 3.