JPH036910B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a long article printing device that continuously prints characters, etc. on the surface of a long article such as a rubber hose or a synthetic resin hose.

<Prior Art> Conventionally, a printing device as shown in FIG. 2 has been proposed as a device for continuously printing, for example, the date of manufacture, the name of the manufacturer, etc. on the outer peripheral surface of a rubber hose. In this printing device, a plate cylinder 21 (for gravure printing) for the manufacturing date, which changes the printing content every day, and a plate cylinder 22 for printing the manufacturer's name and mark are prepared separately, and each plate cylinder 21, 22 is transcribed. The rollers 23 and 24 are arranged in contact with each other, and the transfer rollers 23 and 24 perform printing at locations before and after the hose 25 being conveyed.

<Problems to be solved by the invention> However, in this type of long article printing device,
Since the transfer rollers 23 and 24 come into contact with the same place on the outer peripheral surface of the hose back and forth, the characters etc. printed on the hose by the transfer roller 23 first are transferred to the transfer roller 2.
4, there was a problem that previously printed characters were blurred or erased.

<Means for Solving the Problems> The present invention has been made in view of the above points, and is a printing device that combines one transfer roller and two plate cylinders that contact this transfer roller, To provide a printing device for long objects that can transfer and print characters etc. from each plate cylinder well,
It is configured as follows.

That is, the present invention is a long workpiece in which two printing cylinders are brought into contact with one transfer roller, and the long workpiece is continuously printed on the outer circumferential surface of the long workpiece by contacting the transfer roller while feeding the long workpiece. This is a product printing device, and the outer peripheral surface of the transfer roller has a high transfer portion for the first plate cylinder and a second plate cylinder.
The lower transfer area for the plate cylinder is formed in steps, the first
The plate cylinder is arranged in contact with the high transfer section at the rear in the transport direction of the elongated object, and the second printing cylinder is arranged in contact with the low transfer section in the front in the transport direction of the elongate object.

<Example> Hereinafter, an example of the present invention will be described based on the drawings. FIG. 1 shows a schematic diagram of a printing device that prints the manufacturing date, manufacturer's name, etc. on the surface of a hose made of rubber or synthetic resin. A hose 1 is extruded from an extruder and conveyed to the left by a take-up roller (not shown), and a transfer roller 2 is rotatably arranged in contact with the hose 1 below the hose. The two presser rollers 3 are arranged to press the hose 1. Transfer roller 2
The surface of is formed of silicone rubber or the like, and on its outer peripheral surface there is a high transfer portion 2 of the first plate cylinder 4, which will be described later.
a and the low transfer portion 2b for the second plate cylinder 5 are formed with a slight step difference. The first plate cylinder 4 is a plate cylinder for gravure printing, and is arranged so as to contact only the high transfer portion 2a of the transfer roller 2 at the rear of the conveyance direction of the hose 1 and rotate as a result. are placed in contact with each other. This ink supply roller 10 supplies the ink in the ink container 6 to the first plate cylinder 4.
A doctor blade 7 is provided to remove excess ink from the first printing cylinder 4. On the other hand, on the left side of the first plate cylinder 4, that is, in front of the hose 1 in the conveying direction,
A second plate cylinder 5 for grapia printing that contacts the lower transfer portion 2b of the transfer roller 2 is arranged to be rotated by the transfer roller 2. Further, an ink supply roller 11 is disposed in contact with the lower part of the second plate cylinder 5, and this ink supply roller 11 is immersed in the ink container 8, and is further provided with a doctor to remove excess ink from the plate cylinder surface. A blade 9 is provided. For example, the first plate cylinder 4 is attached with a plate showing the manufacturing date of the hose, which needs to be changed every day, and the second plate cylinder 5 is attached with a plate with the name of the manufacturer, etc., which is continuously used. .

Next, to explain the operation of the long material printing apparatus having the above configuration, the hose 1 is extruded from an extruder and molded, and then a pull-out roller (not shown) is conveyed to the left in FIG. 1 by a conveyor and transferred. It passes between roller 2 and presser roller 3. At this time, the transfer roller 2 rotates counterclockwise in FIG. The manufacturing date and the like are printed on the high transfer portion 2a by the first plate cylinder 4. Therefore, the second plate cylinder 5
contacts the entire outer circumferential surface of the transfer roller 2, but the first plate cylinder 4, which performs printing next to the second plate cylinder 5, contacts only the high transfer portion 2a of the transfer roller 2. Therefore, the characters etc. of the first plate cylinder 4 and the second plate cylinder 5 are printed on the outer circumferential surface of the transfer roller 2 without disturbing the characters already printed on the low transfer part 2b, and then the part where it contacts the hose 1 is printed. Then, these prints are transferred onto the surface of the hose 1 along its longitudinal direction, and clear print is performed without the two plate cylinders interfering with each other.

<Effects of the Invention> As explained above, according to the long material printing apparatus of the present invention, the high transfer portion for the first plate cylinder and the low transfer portion for the second plate cylinder are formed with a step on the outer peripheral surface of the transfer roller. The first plate cylinder is arranged so as to be in contact with the high transfer section at the rear in the direction of conveyance of the long object, and the second plate cylinder is arranged in contact with the low transfer section at the front in the direction of conveyance of the long object. Since the structure is configured such that the characters are printed on the lower transfer portion of the transfer roller by the second printing cylinder,
Next, printing is performed by contacting only the high transfer portion of the transfer roller without being disturbed by the first plate cylinder, and characters, etc. from two plate cylinders can be printed clearly with only one transfer roller. .

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a long material printing apparatus showing an embodiment of the present invention, and FIG. 2 is a schematic diagram of the conventional printer. 1...Hose (long object), 2...Transfer roller,
2a...high transfer area, 2b...low transfer area, 4...
...First edition cylinder, 5...Second edition cylinder.

Claims (1)

[Claims] 1. A long object printing device in which two plate cylinders are brought into contact with one transfer roller, and the long object is continuously printed on the outer peripheral surface of the long object by being brought into contact with the transfer roller while feeding the long object. A high transfer portion for the first plate cylinder and a low transfer portion for the second plate cylinder are formed with a step difference on the outer peripheral surface of the transfer roller, and the first plate cylinder is used for conveying the long object. A long object printing apparatus characterized in that the second plate cylinder is arranged in contact with the high transfer section at the rear in the direction of transport, and the second plate cylinder is arranged in contact with the low transfer section at the front in the conveyance direction of the long object. .