JPH05177808A - Exchange device of plate cylinder of printing machine - Google Patents

Abstract

PURPOSE:To eliminate dirty and hard operation, by a method wherein the title device is provided with a tuning device on the first traversing device on a truck, a vertical moving device provided through the second traversing device on the turning device and a holding device possessing two holding sheets on a tuning horizontal shaft end. CONSTITUTION:At the time of an exchange, a truck 1 is moved within a space of a printing machine by a rail 2 laid at right angle with the center line of the printing machine. Then a holding device 8 is stretched up to a position of a plate cylinder 10 by operating two sets of traversing devices 3, 5. A holding sheet 9 of the holding device 8 which is adjusted beforehand almost to a height of the plate cylinder 10 is by a vertical moving device 6 is put vertically into the plate cylinder 10 by adjusting an air cylinder and the holding sheet 9 is locked vertically. Then the holding sheet 9 and plate cylinder 10 are pulled in on the truck 1 by the two sets of the traversing devices 3, 5, the holding device 8 is turned in the direction of a depositary of an old form plate by a tuning device 4 and the truck 1 is stopped on the outside of a boundary of the printing machine as the plate cylinder 10 remains supported at right angles with the rail 2. The holding device 8 is stretched outside of the printing machine, the plate cylinder 10 is turned by a tuning device 7 and changed to verticality, put on a fixed depositary by traversing further and removal operation is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention automatically removes an old plate cylinder in the space between the gravure printing press cylinders and stands it on the outside of the printing press, and automatically attaches a new plate cylinder set outside to the printing press. The new and old version of the body changing device.

[0002]

BACKGROUND OF THE INVENTION The applicant of the present application has previously filed Japanese Patent Application No. Hei 2-141368 dated June 1, 1990, entitled "Cylinder Changer for Printing Machines".
However, the plate cylinder according to the present application has a smaller length and diameter of 1/2 to 1/3 than the previous one, and the shape is also different, and there is no shaft portion and it is a hollow hole. ing. Therefore, during operation, the shafts are inserted into the holes at both ends and rotated. Therefore, the device that operates by supporting the shafts at both ends as in the previous application cannot be used.

In the clavier printing, the paper wound on a roll is drawn out, and printing is carried out by the ink adhering to the surface of the plate cylinder through a space between the plate cylinder and the impression cylinder. A combination is needed. Therefore, one Clavia printing machine consists of a combination of many plate cylinders and impression cylinders arranged in a straight line, and in order to keep the overall length short, the space between cylinder combinations is narrow, and the part that goes out of the printing machine Is getting narrower. The plate cylinder must be replaced every time the printed material changes, but the replacement work in the space is not easy.

In the conventional cylinder replacement work, two workers held both ends and carried the old and new edition cylinders for replacement, but since it is a tough, dirty, and dangerous work in a narrow space, the workers are fixed. Due to the poor performance, it was requested to install an unmanned exchange for the old and new bodies. However, since the old and new bodies are also placed upright because of the location, the invention of a device different from the above invention is required also from this point.

[0005]

SUMMARY OF THE INVENTION In the present invention, two workers are conventionally covered with printing ink for printing plate replacement,
Although the plate cylinder had been replaced, the purpose is to eliminate such dirty and tough work, reduce the number of personnel, and reduce the cost.

[0006]

SUMMARY OF THE INVENTION The present invention is an apparatus for automating the replacement of old and new plate cylinders as described above.
For each set, one unit is provided in the space between them, and one unit is rotated to allow the front and rear plate cylinders to be exchanged. The plate cylinder changer is provided with a first traversing device that moves at a right angle to the bogie rail on a bogie that moves on a rail laid at a right angle to the center line of the printing machine, on which a turning device for a vertical axis and a horizontal movement are provided. The vertical movement device provided via the second traverse device and the gripping device having two facing gripping plates are attached to the ends of the horizontal rotation shaft. Opposing grip plates expand and contract the space to grip and support the plate cylinder.

The carriage, the first traverse device, the turning device, the second traverse device, the vertical moving device, the rotating device and the gripping device have respective drive mechanisms and locking mechanisms, but the distance between the vertical moving device and the gripping plate is enlarged, An air cylinder is used for the reduction device.In addition to the drive mechanism and lock mechanism, when the grip plates are inserted on both sides of the plate cylinder, the pressure on both sides of the air cylinder piston is set to low pressure to avoid impact, and when completely inserted, the piston A mechanism (hereinafter referred to as a rocking mechanism) for securely holding the plate cylinder by providing high pressure on both sides is provided.

[0008]

When the printing press is in operation, the plate cylinder changer stands by at a fixed position outside the printing press with the gripping device horizontal, but when changing plates, it moves to the internal space of the printing press and at the specified position in the center. With the grip plate horizontal, stop towards the exchange cylinder. Here, the first traversing device and the second traversing device are actuated, and the gripping device is ejected close to the exchange cylinder. At the same time, since the air cylinder pressure is lowered to make it swing, the grip plate becomes floating,
Even if it hits the surface of the plate cylinder, by avoiding it easily, it will move along the surface of the plate cylinder without causing an impact, and the plate cylinder will be sandwiched from above and below by the gripping plate. The pressure rises when it is fully clamped, and the grip plate holds the plate cylinder securely from above and below.

Then, the two sets of traversing devices pull it back to its original position, and the gripping device turns toward the old trunk storage area. Then, the carriage moves to the exit of the printing machine and stops, and the plate cylinder is pushed outward by the second traversing device and at the same time stands vertically by the rotating device. In that state, the first traverse device moves the rail at right angles to the rail to carry the old plate cylinder to a predetermined storage space, and if the gripping device is lowered and the grip plate is removed, the plate cylinder will stand in the predetermined storage space and be accommodated. Removal work is completed.

Then, similarly to the above, when the old plate cylinder on the opposite side is also removed and placed in a predetermined storage space, it is replaced with a new plate cylinder by another device. After that, if the new plate cylinder is mounted on the printing machine by reversing the above process, the replacement work of the old and new plate cylinders is completed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective explanatory view of the present embodiment, FIG. 2 is a plan view, an arrow shows the front of the printing machine, and FIG. 3 is an explanatory view of the process of plate cylinder removal work. The motor pinion 1a attached to the truck 1 meshes with the rack 2a fixed to the rail 2,
The carriage 1 is moved in the space between the printing cylinders at right angles to the center line of the printing machine. On the upper surface of the truck 1, a first traverse device 3 is formed at right angles to the rail 2.
A dovetail-shaped rail 3a that slides with is laid and supports the turning device 4. A rail 5a is laid on the second traversing device 5 above the revolving device 4 to support the horizontal portion of the vertical moving device 6 by means of dovetail groove sliding. Further, a vertical rail 6a is fixed to the vertical portion of the vertical moving device 6, and a rotating device 7 is attached by dovetail groove sliding, thereby supporting the gripping device 8 at the tip of a shaft for horizontal rotation. The gripping device 8 is composed of two gripping plates 9 facing each other, and is capable of sandwiching and supporting the plate cylinder 10. Among the operations of the above parts, the linear movement is performed by an air cylinder, and in particular, the air cylinder for adjusting the distance between the vertical moving device 6 and the gripping device 8 and for adjusting the distance between the gripping plates 9 includes the swinging mechanism.

The plate cylinder changer is normally stored at a position A outside the printing machine as shown by a chain line in FIG. At the time of replacement, first, the carriage 1 moves into the space of the printing machine and automatically stops at the position shown by the thick solid line in FIG. Next, two sets of traverse devices 3 and 5
Is operated and the gripping device 8 is extended to the position of the plate cylinder 10.
Since the plate cylinder 10 has various thicknesses and the central height thereof is not constant, the opening and height of the grip plate 9 are roughly adjusted to the height of the plate cylinder in advance. Therefore, the gripping device 8 that has been pushed out enters the upper and lower sides of the plate cylinder 10 while adjusting the height of the gripping plate 9 by lowering the pressure of the air cylinder by the swinging mechanism, and when the gripping plate 9 is completely inserted, the gripping plate 9 is removed. Lock from the top and bottom.

Next, the gripping plate 9 and the plate cylinder 10 are drawn onto the carriage 1 by the two sets of traversing devices 3 and 5, the gripping device 8 is swung in the direction of the old cylinder storage space B, and the plate cylinder 10 is supported at a right angle to the rail 2. As it is, the carriage 1 reaches the boundary of the printing press and stops.
Here, the gripping device 8 is put out of the printing machine, the plate cylinder 10 is rotated to be changed to a vertical position, and the plate cylinder 10 is further traversed to place the plate cylinder 10 in the predetermined storage space 11 shown in FIG. 2 to complete the work of removing the old plate cylinder.

Similarly, if the old plate cylinder 10 at the rear is also removed and placed side by side in the predetermined storage space 11, it is replaced with the new plate cylinder 12 by another device 13. Thereafter, if the new plate cylinder is sequentially installed in the predetermined position of the plate cylinder by reversing the above process, the old and new copper exchange is completed, and the carriage returns to the predetermined storage position A.

[0015]

EFFECTS OF THE INVENTION Conventionally, two workers were required to replace the plate cylinder. In this case, however, the plate cylinder does not have a shaft, so it is difficult to hold and must be held directly by the arm. Paint and pigments adhere to the surface of the plate cylinder, so the clothes are very dirty, and since it is a manual work in a narrow space, it is extremely fatigued. Therefore, the worker did not last long and had a difficult time recruiting. The present invention solves the problem, keeps the workplace clean, and can reduce the number of personnel by 2 to contribute to cost reduction.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of a structure of a plate cylinder exchanger embodiment.

FIG. 2 is a plan view for explaining the operation surroundings of the plate cylinder exchanger.

FIG. 3 is a process diagram for removing an old plate cylinder of the plate cylinder exchanger.

[Explanation of symbols]

 1 bogie 2 bogie rail 3 first traverse device 4 turning device 5 second traverse device 6 vertical moving device 7 rotating device 8 gripping device 9 gripping plate 10 old version cylinder 11 old version cylinder storage area 12 new version cylinder 13 separate device

Claims (2)

[Claims] 1. A trolley that moves on a rail laid at a right angle to the center line of the printing machine in the space between the printing unit and the cylinder of the printing unit for replacing the old and new edition cylinders of the gravure printing machine, and on the trolley. A swinging device for a vertical axis on a first traverse device that moves at right angles to the rail (hereinafter referred to as traverse), a vertical moving device provided via a second traverse device on the first traverse device, and a gap at the end of the rotating horizontal shaft. And a gripping device having two gripping plates for supporting the plate cylinder by enlarging and reducing the size of the plate cylinder. 2. An air cylinder is used for the vertical movement device and the mechanism for expanding and contracting the distance between the grip plates. The pressure on both sides of the piston is weakened when the plate cylinder is vertically inserted to avoid impact, and after the insertion, the pressure is increased to increase the plate. The plate cylinder changing device for a printing press according to claim 1, which securely supports the cylinder.