JPH0638682Y2 - Printing unit having plate cylinder mounting device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a printing unit of a gravure printing machine, and in particular,
The present invention relates to a printing unit including a plate cylinder mounting device for transporting a plate cylinder with an axis from a plate cylinder preparation position in front of the printing unit to a plate cylinder setting position in the printing unit and vice versa.

[Conventional technology]

To install the plate cylinder in the printing unit of the gravure printing machine, hold the plate cylinder on the plate cylinder carrier that was carried in front of the printing unit by hand, carry it to the set position in the printing unit, and install it. ing. Also, when removing, the plate cylinder in the set position is lifted by hand and carried on the carriage in front of the printing unit.

However, there is a problem that such a manual plate cylinder replacement is a heavy labor. As a device for easily changing the plate cylinder, guides for supporting the plate cylinder shaft are provided inside the frames on both sides of the printing unit, and the plate cylinder shaft is placed on the guides to roll the plate cylinder for transporting the plate cylinder. What you have done is known. However, even when this guide is used, there is a problem in that workability is poor because the plate cylinder must be manually lifted and moved between the carriage and the guide and between the guide and the plate cylinder setting position.

Therefore, a swing arm is provided on the frame of the printing unit, and the plate cylinder shaft is held at the tip thereof, and the swing of the swing arm moves the plate cylinder from the outside of the printing unit to a predetermined position in the printing unit or vice versa. A plate cylinder changing device configured to carry
It is proposed in Japanese Examined Patent Publication No. 53-9121.

[Problems to be solved by the device]

However, in the conventional apparatus disclosed in this publication, when the swing arm that supports the plate cylinder shaft pivots and sends the held plate cylinder to a predetermined position in the printing unit, it is attached to the plate cylinder shaft. The bearing is mounted directly on the bearing support formed on the frame. Therefore, the distance between the center of the plate cylinder shaft held by the swing arm and the fulcrum of the swing arm is It was necessary to keep it constant, and therefore the diameter of the plate cylinder shaft had to be constant, which made it difficult to accommodate plate cylinder shafts of different diameters. Moreover, since the bearing support portion that supports the bearing of the plate cylinder is formed on the frame, it cannot be replaced, and again, bearings of different diameters could not be easily accommodated. As described above, the conventional apparatus has a problem that it cannot easily cope with various types of plate cylinders having different diameters of the plate cylinder shaft and the bearings.

The present invention has been made in view of such conventional problems,
An object of the present invention is to provide a printing unit which is equipped with a plate cylinder mounting device capable of mounting and dismounting a plate cylinder very easily and which can easily cope with plate cylinders having plate cylinder shafts and bearings of different diameters. To do.

[Means for Solving the Problems]

The printing unit of the present invention, as shown in the embodiment of the drawing,
It has a frame 1,1 on both sides for supporting the plate cylinder 2 and a plate cylinder mounting device 10 for mounting and dismounting the plate cylinder at the plate cylinder setting position B of the frame 1, the frame 1 being for mounting and dismounting the plate cylinder. A notch portion for occasionally moving the plate cylinder shaft 3, which has a substantially horizontal support surface 5A for movably holding a bearing 4 attached to the plate cylinder shaft, and the support surface. And a top 6 provided with a bearing support groove 7 for supporting the bearing.

Further, the plate cylinder mounting device 10 is a pair of plate cylinder transport arms 12 having a recess 13 for supporting the plate cylinder shaft at one end, each of which is near the frames on both sides of the plate cylinder set position B. A pair of plate cylinder carrying arms 12 provided so as to be swingable around a fulcrum located below, and the plate cylinder carrying arms are moved from a position where the recess is projected forward of the frame to a plate cylinder setting position. So that when the plate cylinder carrying arm moves to the plate cylinder set position by supporting the plate cylinder shaft in the recess at the tip thereof, it is attached to the plate cylinder shaft 3. When the bearing 4 is lowered onto the supporting surface 5A of the frame, and then the plate cylinder shaft is pushed with the bearing 4 placed on the supporting surface, the bearing 4 is pushed into the bearing supporting groove 7 and vice versa. , Press the plate cylinder shaft 3 to put the bearing 4 in the bearing support groove 7 on the support surface 5A, and then And it is configured to lift the barrel 3.

[Action]

According to the printing unit having the above-described configuration, the plate cylinder transport arm 12 of the plate cylinder mounting device places the plate cylinder shaft 3 in the recess 13 at the position where the tip of the plate cylinder transport arm 12 projects toward the front of the frame 1. 2 and then swings around the drive shaft 11 to feed the supported plate cylinder 2 to the plate cylinder setting position in the printing unit, and vice versa, to move the plate cylinder in the plate cylinder setting position. The cylinder 2 can be carried out in front of the printing unit. Therefore, it is not necessary for an operator to hold and attach a heavy plate cylinder to the plate cylinder, and the plate cylinder replacement work becomes extremely easy.

Here, when the plate cylinder transport arm 12 moves to the plate cylinder set position by supporting the plate cylinder shaft in the recess of its tip, the bearing 4 attached to the plate cylinder shaft 3 is first placed on the support surface 5A. Then, the plate cylinder shaft 3 is pushed down with the bearing 4 mounted on the support surface 5A. Therefore, the bearing 4 rolls on the support surface 5A and falls into the bearing support groove 7, so that the plate cylinder 2 is set at a predetermined plate cylinder setting position. When the plate cylinder transport arm 12 moves in the opposite direction, the plate cylinder shaft 3 is pushed to place the bearing 4 in the bearing support groove 7 on the support surface 5A, and roll it on an appropriate position. The plate cylinder carrying arm 12 lifts the plate cylinder shaft 3 and carries it in front of the frame 1. Thus, the plate cylinder transport arm 12
When transporting the plate cylinder, the bearing 4 attached to the plate cylinder shaft is temporarily lowered onto the support surface 5A, rolled over to be sent to the plate cylinder set position, and vice versa. ， The diameter of the plate cylinder shaft is different, the plate cylinder transport arm 12
Even if the distance between the center of the plate cylinder shaft held at 1 and the center of rotation of the plate cylinder transport arm 12 changes, the bearing of the plate cylinder can be attached to and detached from the bearing support groove 7 without hindrance. Further, since the bearing support groove 7 is formed on the top 6 which can be removed from the frame 1, by replacing the top 6 with a bearing support groove 7 having a desired diameter, a bearing having a different diameter can be obtained. You can also use it. Thus, it is possible to easily deal with various types of plate cylinders (plate cylinder shafts and bearings having different diameters).

〔Example〕

 A preferred embodiment of the present invention shown in the drawings will be described below.

In FIGS. 1 and 2, 1 is a frame on both sides of the printing unit, 2 is a plate cylinder, 3 is a plate cylinder shaft, and 4 is a bearing attached to the plate cylinder shaft 3. The frame 1 has a horizontal notch 5 for moving the plate cylinder shaft 3 when the plate cylinder is attached and detached, and a frame for supporting a bearing 4 attached to the plate cylinder shaft 3 on the lower surface at the back. 6 is removably attached. As shown in FIG. 3, the top 6 has a bearing support groove 7 having a width wider than that of the bearing 4. As shown in FIG. 4, the bearing support groove 7 has an arcuate cross section with an inner diameter adapted to the outer diameter of the bearing 4, and the bearing 4 is seated in the bearing support groove 7 so that the plate cylinder 2 is in a fixed position. Retained. This position is the plate cylinder setting position indicated by the symbol B. Conventionally, the depth of the bearing support groove 7 of the top 6 is large and more than half of the bearing 5 is fitted, but in this embodiment, this depth is shallow, for example, about 1/3 of the outer diameter of the bearing 4.
It is about degree. With this structure, by pushing the plate cylinder shaft 3 to the right in FIG. 4, the bearing 4 can be easily pushed out of the bearing support groove 7 and placed on the adjacent support surface 5A.

In FIGS. 1 and 2, reference numeral 10 is a plate cylinder mounting device. The plate cylinder mounting device 10 is located below the plate cylinder setting position in the printing unit and extends in parallel to the set plate cylinder, and the drive shafts near the frames 1 on both sides of the printing unit. It has a pair of plate cylinder carrying arms 12 attached to 11 and having a recess 13 at the front end for supporting the plate cylinder shaft 3, and means for swinging the plate cylinder carrying arms, for example a hydraulic cylinder 14. The recess 13 at the tip of the plate cylinder carrying arm 12 has a radius that is considerably larger than the radius of the plate cylinder shaft 3 so that the plate cylinder shaft 3 can be supported loosely. The drive shaft 11 serves as a fulcrum of the swing of the plate cylinder transport arm 12, and its mounting position is determined so that the recess 13 moves from the position where the recess 13 protrudes forward of the printing unit to the plate cylinder setting position. Is a position A and a position B so that the plate cylinder 2 can be moved almost horizontally from the plate cylinder preparation position indicated by reference symbol A in FIG. 1 to the plate cylinder set position indicated by reference symbol B as in the illustrated embodiment. It is located below the middle of the position. Furthermore, the shape of the recess 13, the length of the plate cylinder transport arm 12,
As for the position of the drive shaft 11, when the plate cylinder transport arm 12 supports the plate cylinder shaft in the recess of the tip thereof and moves to the plate cylinder set position, the bearing mounted on the plate cylinder shaft is supported by the frame. The bearing can be pushed down into the bearing support groove by pushing the plate barrel shaft with the bearing placed on the support surface, and then the bearing cylinder can be pushed into the bearing support groove when moving in the opposite direction. It is designed so that the bearing of can be placed on the support surface, and then the plate cylinder shaft can be lifted. When the plate cylinder carrying arm 12 is rotated to the position shown by the chain double-dashed line 12A, the concave end The inner surface of the place 13 is slightly separated from the plate cylinder shaft 3 set at the plate cylinder setting position so that the rotation of the plate cylinder shaft 3 is not hindered.

As the means for swinging the plate cylinder carrying arm 12, the hydraulic cylinder 14 is used in the illustrated embodiment, but an air cylinder, a torque actuator, a motor or the like may be used instead. Instead of fixing the plate cylinder carrying arm 12 to the drive shaft, a means for holding the plate cylinder carrying arm 12 rotatably on a shaft fixed to a frame and directly swinging the plate cylinder carrying arm may be connected.

Next, the operation of the plate cylinder mounting device having the above structure will be described. With the plate cylinder carrier arm 12 rotated to the left of the position shown by the solid line in FIG. 1, the plate cylinder 2 has a carrier truck (not shown).
It is carried to the position A on the front of the printing unit and raised by the lifting device of the carriage. Next, the hydraulic cylinder
14 operates to rotate the plate cylinder transport arm 12 to the solid line position. In this state, the plate cylinder 2 is lowered by the lifting device of the carriage, and the plate cylinder shaft 3 is supported by the recess 13 of the plate cylinder carrying arm 12. Next, the operation of the hydraulic cylinder 14 causes the plate cylinder transport arm 12 to rotate counterclockwise, and sends the plate cylinder 2 toward the plate cylinder set position. At this time, the plate cylinder shaft 3 is attached to the plate cylinder transport arm 12
Supported by, move in the notch 5 of the frame 1,
The bearing 4 mounted on the plate cylinder shaft 3 moves without contact with the lower surface of the notch portion 5, but when approaching the top 6, it comes into contact with the support surface 5A adjacent to the top 6 and is supported by this support surface 5A. It After that, the plate cylinder shaft 3 is pushed toward the plate cylinder setting position by the plate cylinder conveying arm 12, and the bearing 4 moves while rolling on the support surface 5A and enters the bearing support groove 7 of the top 6. Thus, the plate cylinder 2 is set at the plate cylinder setting position. When the plate cylinder 2 is located at the plate cylinder set position, the plate cylinder shaft 3 is not in contact with the plate cylinder transport arm 12, and there is no hindrance to the rotation of the plate cylinder.

Further, when the plate cylinder is taken out, the plate cylinder transport arm 12 rotates clockwise from the position shown by the chain double-dashed line in FIG.
To the right to push the bearing 4 of the plate cylinder shaft 3 from the top 6 onto the adjacent supporting surface 5A, and then the plate cylinder shaft 3 to its recess
It is supported by 13 and carried out to the original plate cylinder preparation position A. At this position, it is transferred to a plate cylinder carrier (not shown).

[Effect of device]

As described above, according to the present invention, the plate cylinder transport arm 12 is rotated to move the plate cylinder to the plate cylinder preparation position A in front of the printing unit.
It is possible to feed from the printing cylinder to the plate cylinder setting position B in the printing unit and vice versa, which makes it extremely easy to mount and take out the plate cylinder, and to use various types of different diameters of the plate cylinder shaft and bearings. It is possible to easily deal with the plate cylinder.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention.
FIG. 2 is a sectional view taken in the direction of the arrow I, FIG. 2 is a front sectional view of the above-described embodiment, and FIG. 3 is a state in which the plate cylinder 2 is being conveyed by the plate cylinder transport arm 12 of the above-described embodiment. The vicinity of the shaft 3 and the lower surface of the cutout portion 5 of the frame 1, the top view of the top 6, etc. are shown in FIG.
It is a principal part sectional view which shows the top 6 etc. 1 ... Frame, 2 ... Plate cylinder, 3 ... Plate cylinder shaft 4 ... Bearing, 5 ... Notch, 5A ... Support surface 6 ... Top, 10 ... Plate cylinder mounting device 11 ... Drive shaft, 12 ... Plate cylinder transport arm 13 … Recesses, 14… Hydraulic cylinders

Claims (1)

[Scope of utility model registration request] 1. A plate cylinder on both sides for supporting the plate cylinder and a plate cylinder mounting device for mounting and dismounting the plate cylinder at a position where the plate cylinder is set on the frame. A notch for moving the shaft, the notch having a substantially horizontal support surface for movably holding the bearing attached to the plate cylinder shaft, and a detachable attachment behind the support surface. And a top having a bearing support groove for supporting the bearing, wherein the plate cylinder mounting device is a pair of plate cylinder transport arms having a recess for supporting the plate cylinder shaft at one end, A pair of plate cylinder carrying arms, each of which is swingably provided around a fulcrum located below the plate cylinder set position in the vicinity of the frames on both sides, and the recess is provided with the plate cylinder carrying arms. Move from the position projecting forward of the frame to the plate cylinder setting position. So that the plate cylinder carrying arm has
When the plate cylinder shaft is supported in the recess of its tip and moved to the plate cylinder set position, the bearing mounted on the plate cylinder shaft is lowered onto the supporting surface of the frame, and then the bearing is placed on the supporting surface. Press the plate cylinder shaft with and push the bearing into the bearing support groove,
Further, when moving in the opposite direction, the plate cylinder shaft is pushed to put the bearing in the bearing support groove on the support surface, and then the plate cylinder shaft is lifted up. A printing unit having.