JP3047913U - Plate switching printer - Google Patents

Abstract

(57) [Problem] To provide a plate switching printing apparatus capable of performing printing by switching plate cylinders. SOLUTION: The plate cylinder support mechanism 1 has four plate cylinders 11, 1 and 4.
2, 13, and 14 are rotatably supported at positions that are at 90 degrees to each other. The plate cylinder support mechanism 1 is rotated by a plate cylinder switching cylinder 101 and a one-way clutch 102. Printing is performed by sequentially switching the plate cylinders 11, 12, 13, and 14. The plate cylinder 11 is fixed by the plate cylinder shaft fixing cylinder 2. The pressure roll 3 is a pressure roll lifting cylinder 3
1, the plate cylinder 11 set at the printing position is pressed against the lower position. The ink tray 4 is moved up and down by an ink tray lifting cylinder 41. The doctor 5 is moved by a doctor elevating cylinder 51 and is pressed against the plate cylinder 11 during printing.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a plate switching printing device, and more particularly to a plate switching printing device capable of easily switching a plurality of plate cylinders.

[0002]

[Prior art]

 In a single-color printing device, one plate cylinder on which a plate of characters or the like to be printed is formed is manufactured, and the ink stored in an ink tray or the like is immersed in a rotatably fixed plate cylinder. After the doctor removes excess ink, printing is performed on the film moved between the plate cylinder and the pressure roll.

[0003]

[Problems to be solved by the invention]

 As described above, in single-color printing, the number of plate cylinders used for printing is usually one, so one plate cylinder is set at a predetermined position for printing and printing is performed. Therefore, when printing another pattern or the like by the next plate cylinder, the plate cylinder needs to be replaced. In such a plate cylinder exchange, the printing press is stopped once, unnecessary plate cylinders are removed, the next plate cylinder is attached and fixed, and then the next printing is started. Since such plate cylinder replacement requires time and effort, the next printing cannot be performed until the replacement is completed, and the printing press is idle, and the next printing is performed quickly and smoothly. There was a problem that it was not possible.

The present invention has been made in view of the above-described problems, and a plurality of prepared plate cylinders are previously mounted on a printing press, and a plate switching printing apparatus capable of performing printing by switching plate cylinders. The purpose is to provide.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, a plate switching printing apparatus of the present invention supports a plurality of plate cylinders, and a plate cylinder support mechanism rotatable so that one of the plurality of plate cylinders is at a predetermined printing position; A plate cylinder switching rotation mechanism for rotating the plate cylinder support mechanism so that a predetermined plate cylinder among the plurality of plate cylinders is at the printing position; and a plate cylinder fixing mechanism for fixing the plate cylinder at the printing position. A mechanism, an ink tray provided for immersing the plate cylinder at the printing position in ink, an ink tray elevating mechanism for raising and lowering the ink tray, and being pressed against the plate cylinder at the printing position. A pressure roll, a doctor pressed against the plate cylinder at the printing position, a pressure roll elevating mechanism for raising and lowering the pressure roll, and a doctor elevating mechanism for raising and lowering the doctor; To switch to print And butterflies.

In the plate switching printing apparatus, the plate cylinder switching rotation mechanism includes an extendable cylinder and a one-way clutch that transmits the cylinder in one direction only. Sometimes, the plate cylinder support mechanism is rotated so that the next plate cylinder among the plurality of plate cylinders is at the printing position.

[0007]

[Embodiment of the invention]

 Next, an embodiment of the plate switching printing apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view of an embodiment of the plate switching printing apparatus according to the present invention, and FIG. 2 is a front view thereof. FIG. 1 is a view of the apparatus in FIG. 2 as viewed from the left side, and a part of the apparatus is omitted to make main parts easy to see.

This device has a plate cylinder support mechanism 1. In this embodiment, the plate cylinder support mechanism 1 rotatably supports the four plate cylinders 11, 12, 13, and 14 at positions that are 90 degrees from each other. The plate cylinders 11, 12, 13, and 14 are used for monochrome printing in this order. As shown in FIG. 1, first, the plate cylinder 11 is set at the printing position. The plate cylinder 11 is fixed at this position by the plate cylinder shaft fixing cylinder 2.

The plate cylinder support mechanism 1 is rotated by a plate cylinder switching cylinder 101 and a one-way clutch 102. The plate cylinder switching cylinder 101 performs expansion and contraction operations, and the one-way clutch 102 transmits the power of the plate cylinder support mechanism 1 only when the plate cylinder switching cylinder 101 is extended, and rotates the plate cylinder support mechanism 1. In this embodiment, one extension of the plate cylinder switching cylinder 101 rotates the plate cylinder support mechanism 1 so that the next plate cylinder 12 is at the printing position.

A pressure roll 3 is provided above the plate cylinder 11 set at the printing position, and is pressed against and fixed to the plate cylinder 11. The pressure roll 3 is moved up and down by a pressure roll elevating cylinder 31, and presses the plate cylinder 11 set at the printing position when in the lower position.

An ink tray 4 is provided below the plate cylinder 11 set at the printing position. The ink tray 4 is moved up and down by an ink tray lifting cylinder 41. The ink is stored in the ink tray 4, and the ink is immersed in the plate cylinder 11 set at the printing position during printing.

The doctor 5 is pressed against the plate cylinder 11 set at the printing position. The doctor 5 is moved by a doctor elevating cylinder 51 and pressed against the plate cylinder 11 during printing.

The printing apparatus is further provided with a printing plate cylinder rotation motor 6 for rotating a plate cylinder (11 in this case) set at a printing position.

Next, the plate cylinder switching operation of the present apparatus will be described. First, the plate cylinder axle fixing cylinder 2, the pressure roll 3, the ink tray 4, and the doctor 5 are each released. That is, by operating the plate cylinder shaft fixing cylinder 2, the pressure roll lifting cylinder 31, the ink tray lifting cylinder 41, and the doctor lifting cylinder 51, the state in which the plate cylinder 11 is not fixed, the state in which the pressure roll 3 is not pressed against the plate cylinder 11, The state in which the ink in the ink plate 4 is not immersed in the plate cylinder 11 and the state in which the doctor 5 is not pressed against the plate cylinder 11 are set.

Next, the plate cylinder switching cylinder 101 and the one-way clutch 102 operate the plate cylinder so that one of the plate cylinders 12, 13, and 14 to be printed is at a printing position (the position of the plate cylinder 11 in the figure). The support mechanism 1 is rotated by a predetermined amount. After rotating the plate cylinder support mechanism 1 so that the plate cylinder used for printing is at the upper position (the position of the plate cylinder 11 in the figure), the film 7 to be printed, such as polyethylene, is moved to the plate cylinder and the pressure roll. Insert between 3.

By operating the plate cylinder shaft fixing cylinder 2, the pressure roll lifting cylinder 31, the ink tray lifting cylinder 41, and the doctor lifting cylinder 51, the plate cylinder, the pressure roll 3, the ink tray 4, and the doctor 5 are moved to predetermined positions. The print position. Printing is performed by rotating the printing plate cylinder rotation motor 6.

After the printing is completed, the plate cylinder shaft fixing cylinder 2, the pressure roll 3, the ink tray 4, and the doctor 5 are released again, and the plate cylinder switching cylinder 101 is operated to rotate the plate cylinder support mechanism 1, and So that the plate cylinder used to print the print is in the upper print position.

By repeating such operations, printing can be performed by switching the plate cylinders 11 to 14. Therefore, according to the present embodiment, by mounting four plate cylinders 11 to 14 in advance on the printing press, it is possible to perform the four types of printing by switching the plate cylinders by only a simple switching operation. Because it is possible, there is no need to stop the printing press while changing the plate cylinder as in the past. According to the present embodiment, it is possible to replace a plate cylinder not used for printing while printing is performed with one plate cylinder. This saves wasted time for plate cylinder replacement and allows the next printing to be performed smoothly.

In this embodiment, four plate cylinders are mounted on the plate cylinder support mechanism 1, but the number of plate cylinders mounted on the plate cylinder support mechanism 1 is not limited to four. It may be the number. The rotation of the plate cylinder support mechanism 1 may be performed by a mechanism other than the plate cylinder switching cylinder 101 and the one-way clutch 102.

[0021]

[Effect of the invention]

 According to the present invention, printing can be performed by switching the plate cylinder with a simple operation, so that the trouble of replacing the plate cylinder can be omitted and the next printing can be smoothly performed.

Further, when the plate cylinder switching cylinder 101 and the one-way clutch 102 are used, the plate cylinder can be switched by one operation of the plate cylinder switching cylinder, so that the switching is further facilitated. .

[Brief description of the drawings]

FIG. 1 is a side view showing a plate switching printing apparatus according to the present invention.

FIG. 2 is a front view showing the plate switching printing apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 plate cylinder support mechanism 2 plate cylinder shaft fixing cylinder 3 pressure roll 4 ink tray 5 doctor 6 printing plate cylinder rotation motor 11, 12, 13, 14 plate cylinder 31 pressure roll lifting cylinder 41 ink tray lifting cylinder 51 doctor lifting cylinder 101 Plate cylinder switching cylinder 102 One-way clutch

[Procedure amendment]

[Submission date] December 8, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims for utility model registration

[Correction method] Change

[Correction contents]

[Utility model registration claims]

Claims (2)

[Utility model registration claims] 1. A plate cylinder support mechanism that supports a plurality of plate cylinders and is rotatable so that one of the plurality of plate cylinders is at a predetermined printing position. A plate cylinder switching rotation mechanism for rotating a predetermined plate cylinder among the cylinders to be at the printing position, a plate cylinder fixing mechanism for fixing the plate cylinder at the printing position, and the plate cylinder at the printing position. An ink tray provided to immerse the ink, an ink tray lifting mechanism for raising and lowering the ink tray, a pressure roll pressed against the plate cylinder at the printing position, and the plate cylinder at the printing position. Plate switching printing, comprising: a doctor to be pressed, a pressure roll elevating mechanism for elevating and lowering the pressure roll, and a doctor elevating mechanism for elevating and lowering the doctor, and performing printing by switching the plurality of plate cylinders. apparatus. 2. The plate cylinder switching rotation mechanism includes a cylinder that expands and contracts, and a one-way clutch that transmits expansion and contraction operation of the cylinder only in one direction. A plate switching printing apparatus characterized in that the plate cylinder support mechanism is rotated so that the next plate cylinder is at the printing position.