JPS62174149A - Plate cylinder device of rotary press - Google Patents

Abstract

PURPOSE:To enable a printing plate to be adjusted very easily and for a far brief time by fitting one cylinder into a plate cylinder on another side in always freely slidable fashion in a rotational and axial direction under a condition that a printing plate is attached to a plate mount split into right and left sides of axial direction. CONSTITUTION:A plate cylinder 15 consists of a large dia columnar part 151 and a small dia columnar part 152 which are separated into right and left sides of axial direction from the center. A printing plate 16 is mounted on the external circumferential surface of the large dia columnar part 151, and the plate cylinder 15 has a shaft 153 protruded on the large dia section end. The small dia columnar part 152 becomes a support and has a shaft 154 extruded on the edge. A cylinder 15' has an external circumferential surface of the same diameter as the plate cylinder 15 with a bottomed cylindrical shaft 21 provided on one side. On the support 152, said cylinder 15' is fitted to the small dia part in always freely rotatable and slidable fashion in axial direction under such a condition that a shaft at the end of the small dia part of the plate cylinder is supported on the internal circumferential surface of the cylinder shaft. Thus the whole plate cylinder is formed with the plate cylinder 15 and the cylinder 15', and a printing plate 17 is attached to the cylinder 15'.

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a plate cylinder device in a rotary printing press, and in particular, it is possible to divide plates into left and right sides in the axial direction on one plate cylinder and separately attach plates to each side. This invention relates to a plate cylinder device capable of individually finely adjusting the left and right printing plates of a so-called double-format printing and heating machine during operation.

Conventional Technology This type of plate cylinder device has problems in that when the plate is made into a single plate, the plate width becomes too wide, and the plate becomes large and difficult to handle.
In addition, in cases where the factory does not have plate-making capacity, the above problem is solved by halving the size of the plates by arranging the plates in two rows, but in this case, the attachment points for the left and right plates are generally located on the circumference. The printing paper is stabilized by shifting the phase by a certain distance to prevent the printing pressure from being released simultaneously to the attachment parts of the left and right plates.

However, in the conventional plate cylinder device, the respective registers of the left and right plates are adjusted by using a left-right register adjustment device or a circumferential register adjustment device only on either the left or right side. It is common to make corrections or adjust circumferential register.

Problems to be Solved by the Invention In the conventional device as described above, it is possible to register only one side, either the left side or the right side, by the left-right register adjustment device or the circumferential direction register adjustment device, but the other When the plate is attached to the plate cylinder, misregistration is unavoidable when printing each color due to accuracy errors in plate making and manufacturing errors in the plate mounting device on the plate cylinder.

Therefore, there are problems such as stopping the machine, loosening the plate mounting device, and moving the plate by hand, or manually moving the adjustment mechanism, which requires a lot of time and effort to achieve registration.

If you want to adjust the register of the printing plates by the same amount at the same time, you can adjust the register while the printing press is running or stopped, but such cases are extremely rare, and in most cases, only one adjustment is required. In such a case, the printing press must be stopped and the mounting position of one printing plate relative to the plate cylinder must be corrected by manual adjustment, which requires a large amount of registration adjustment. It takes a lot of time.

Regarding these points, the invention of Japanese Patent Publication No. 36-1567 was proposed, but this invention provided a lead plate fine adjustment device in the circumferential direction and a lead plate fine adjustment device in the axial direction at both left and right ends of the plate cylinder shaft, respectively, and Among them, fine adjustment of the lead plate was performed separately on both the left and right halves to improve efficiency, but this one added two sets of adjustment cylinders on the single plate cylinder. The plate cylinder itself is not divided into two left and right parts, and the circumferential and axial adjustment devices are installed inside each frame, making the frame span narrower. As a result, it becomes disadvantageous in terms of mechanical strength and cost, and
This is extremely dangerous as adjustments must be made near high-speed rotating bodies, and furthermore, the printing quality may deteriorate due to oil staining the printing surface, and malfunctions may occur due to adhesion of water, ink mist, etc. It has some drawbacks.

Means and Function for Solving the Problems In order to solve the various problems mentioned above, the present invention has a basic configuration of the plate cylinder in which the plate cylinder is divided into two parts in the axial direction left and right at the central part of the plate cylinder. It is divided into a cylinder main body part and a cylindrical part, and these two parts are not mechanically connected.In other words, one side of the plate cylinder of the printing press in the axial direction has a stepped small diameter, Shafts are provided at both ends of the large diameter part and the small diameter part of the plate cylinder, respectively, and a cylinder with a bottomed cylindrical shaft is fixed to the small diameter part, and the shaft at the end of the small diameter part of the plate cylinder While supported on the inner circumferential surface of the shaft, the frame supports the shafts at both ends of the plate cylinder and the shaft of the cylinder. The present invention provides a plate cylinder device for a rotary printing press in which a cylinder is interlocked and connected to a plunket cylinder so as to be able to rotate and move in the axial direction separately, and constitutes a plate mounting section divided into left and right sides in the axial direction. With the plate cylinder and cylinder mounted, it is possible to perform fine adjustment in the circumferential direction and the axial direction very easily and in a short time, both during operation and when stopped.

In addition, the plate cylinder is composed of the other plate cylinder and the other cylinder that fits into the small diameter portion of the plate cylinder, which increases registration accuracy, reduces noise generation, improves mechanical strength, and improves safety. As a result, the quality of printing also improves.

EXAMPLE Below, the configuration will be explained based on the example shown in the drawings.As shown in Figure 1, the plate cylinder is formed in a step shape at the center of the machine, that is, from the center to the left and right in the axial direction. Large diameter cylindrical part 15. And small diameter cylindrical part 15! The plate 1 is placed on the outer peripheral surface of the large diameter cylindrical portion 151 of the plate cylinder 15 which is divided into two parts.
6, and the plate cylinder 15 has a shaft 15 protruding from the end of its large diameter portion. The small-diameter cylindrical portion (hereinafter referred to as small-diameter portion) 15 serves as a supporting portion, and has a shaft 15 at the end.
A cylinder 15', which is a cylinder having an outer circumferential surface having the same diameter as the outer circumferential surface of the plate cylinder 15 and has a bottomed cylindrical shaft 21 on the side thereof, is provided on the supporting part 152 to hold the plate. The shaft at the end of the small diameter portion of the cylinder is supported on the inner circumferential surface of the shaft of the cylinder, and is fitted into the small diameter portion of the plate cylinder 15 so as to be able to rotate and slide in the axial direction at all times. The entire plate cylinder is formed by the cylinder 15' and the cylinder 15'.The plate 17 is attached to the cylinder 15'.The plate 16,17 is attached to each mounting portion 18.17, as shown in FIGS. 19 are out of phase with each other. A plurality of grooves 20 are cut into the inner surface of the cylinder 15' to reduce the contribution resistance of the cylinder 15' to the plate cylinder 15.

The end of the cylinder 15' is fixed with several screws 22 to a cylindrical part of a bottomed cylindrical shaft 21 that supports the inner peripheral surface of a shaft part 154 at one end (left end) of the plate fl1m+l5. The outer periphery of this shaft 21 is held by a roller bearing 24 attached to a sleeve 23 fitted to the frame 5, forming a drive shaft portion, and the shaft 1 at the end of the small diameter portion of the plate cylinder 15
54 is the other end (right end) of the zero plate cylinder 15 held by the roller bearing 24 attached to the cylindrical sleeve 23
Support shaft 15. is the sleeve 25 fitted to the frame 4.
It is held by a roller bearing 27 attached to a roller bearing 26 and forms a drive shaft portion.

A helical gear 14 that meshes with a helical gear 13 fixed to one end of the plunket cylinder 2 is fixed to the end of the large diameter portion of the plate cylinder 3. Further, a helical gear 28 having the same dimensions as the helical gear I3 is fixed to the other end of the plumket cylinder 2.

An external gear 29 is fixed to the shaft 21 with a key and a nut, and an internal gear 30 is fitted into the external gear 29. The internal gear 30 is fixed to a gear coupling 31, and a pull-out stop plate 32 is attached to the opposite surface of the gear coupling 31. A helical gear 33 on the driven side that meshes with the helical gear 28 on the driving side is fixed to the gear coupling 31. This driven helical gear 33 has the same dimensions as the driven helical gear 14 fixed to one end of the plate cylinder 3. The helical gear 33 on the driven side is rotatably engaged with the shaft 21 by an external gear 29 and an internal gear 30 so as to be movable in the axial direction. By helical gear 2g, 33,
It is configured to be rotationally driven separately from the plate cylinder 3.

The gear coupling 31 includes a cylindrical member 3 that fits onto the shaft 21.
4 is fixed with bolts, and a rotary sleeve 36 having gears on its outer periphery is fitted and supported on the cylindrical member 34 via an angular contact bearing 35. The outer ring and inner ring of the angular contact bearing 35 are fixed with presser feet 37 and 38. Rotating sleeve 3
6 has a screw on its outer periphery without a gear, which is screwed into a ring 40 fixed to a bracket 39. Note that the bracket 39 is fixed to the frame 5. In fitting the shaft 21 and the frame 5, the roller bearing 24 fitted to the shaft 21 is fixed to the shaft 21 with a nut 43 through a collar 41 and a washer 42, and the outer periphery is fixed to the frame 5. It fits into the sleeve 23 so that it can slide in the axial direction. 44 is a shim.

A gear 45 meshes with the gear of the rotating sleeve 36.

This gear 45 is fixed to the shaft 4b. The shaft 46 is supported on a bracket 39.47. Another gear 4g is solidly disposed at the other end of this shaft 46, and this gear 48 has a
A drive gear 49ff driven by a motor 49 that rotates forward and reverse.
are engaged. The drive gear 49Q also includes a detection gear 5 connected to a rotation speed detection device 50 such as a bottom/shimimeter.
1 is meshing.

On the other hand, a bearing member 52 is fixed concentrically to the shaft end of the shaft 21, and one end portion of a shaft 53 is rotatably engaged with the bearing member 52 in the axial direction. The shaft 53 is the bracket 5
4, and is engaged in the rotational direction with a key 56, and is slidable in the axial direction.

A screw 57 is provided at the other end of the shaft 53, and this screw 5
7, a gear 58 and a locking fitting 5 fixed thereto;
9 are screwed together. Gear 5g and locking fitting 5
The end face of the bracket 9 is supported in the axial direction by the ring 55 and the lid 60 of the bracket 54 via a thrust bearing. The gear 58 is meshed with a gear 62 driven by the motor 1 which rotates in forward and reverse directions. The gear 58 of the octopus is meshed with a detection gear 64 connected to a rotation speed detection device 63 such as a potentiometer.

Also, in Figure 1, the bearing part of version BIQjl 5 is 82+
It has exactly the same structure as the shaft bearing part of the plate cylinder 1.
5 has exactly the same structure as the cylinder 15' side, so that fine adjustment can be made in the circumferential direction and the axial direction.

In the configuration described above, by rotating the drive shaft 8, the common impression cylinder 1 is rotated via the bevel gear 10.11, and thereby the plunket cylinder 2 is rotated. Due to this rotation of the plunket cylinder 2, the large diameter side of the plate cylinder 15 is connected to the helical gear 1.
The cylinder 15', which is rotationally driven by the engagement of 3.14 and fitted into the small diameter part of the plate cylinder, is connected to a driving side helical gear 28 and a driven side helical gear 33 provided on the other end side of the plumket cylinder 2. , gear coupling 31, internal gear 3
0, it is rotated together with the shaft 2I via an external gear 29 at the same rotational speed as the large diameter side of the plate cylinder I5.

At this time, when finely adjusting the cylinder 15' relative to the plate cylinder 15 in the circumferential direction, the rotary sleeve 36 is rotated, that is, the motor 49 is driven and the gear 49a is adjusted.

When the rotary sleeve 36 is rotated through 48.45'e, the rotary sleeve 36 is moved axially with respect to the bracket 39 by the screw, and the driven side helical gear axially coupled to the rotary sleeve 36 is moved. 33 is moved in the axial direction. As a result, the meshing position between this helical gear 33 and the driving side helical gear 28 shifts in the axial direction, and the driven side helical gear 33 moves in the circumferential direction relative to the driving side due to the action of the helical angle. Therefore, the cylinder 15', which is rotationally engaged with the helical gear 33 on the driven side, is moved relative to the plate cylinder 15 in the circumferential direction, and the phase of relative rotation is changed.

This direction of movement is determined by the direction of rotation of the motor 49.

On the other hand, when finely adjusting the cylinder 15' in the axial direction with respect to the plate cylinder 15, a gear 58 screwed onto a screw 57 of a shaft 53 is rotated by a motor 61. In this way, since this gear 58 is locked in the axial direction, the shaft 53 is moved in the axial direction by the screw 57, whereby the cylinder 15' is moved axially through the shaft 21 that is engaged with this shaft 53 in the axial direction. direction.

The circumferential and axial movements take place independently of each other during rotation of the plate cylinder.

Further, the amount of each movement is regulated via a rotation speed detection device 50, 63 such as a potentiometer.

Note that the driving source for each movement operation is not limited to a motor, and may be a manual handle.Also, to drive the shaft 46 of the gear 45 that rotates the rotating sleeve 36, it may be connected by a chain instead of a gear. good.

In addition, in this embodiment, the axial register adjustment mechanism and the circumferential register adjustment mechanism are installed on the outside of both frames, so the frame span can be narrowed.
As a result, it is greatly advantageous in terms of mechanical strength such as deflection of the plate cylinder and other parts, and is also advantageous in terms of cost. Furthermore, since it can be adjusted outside the rotating body, it is also excellent in terms of safety.
In addition, the printing surface is not contaminated with oil or the like, and there is almost no adhesion of water or ink mist, improving printing quality and preventing malfunctions.

Effects of the Invention Since the present invention is constructed as described above in detail, one cylinder is constantly rotated and axially rotated with respect to the other plate cylinder, with a plate attached to each of the plate mounting portions divided to the left and right in the axial direction. Since they are fitted so that they can slide freely in the direction, they can be freely adjusted in the circumferential direction and the axial direction.
Compared to conventional double-format printers, this makes it possible to adjust plates much more easily and in a much shorter time. It has a remarkable effect when it is not possible.

In addition, in constructing the plate cylinder, only one plate cylinder and a half cylinder on one side were used, which fit into the small diameter part of the cylinder, so there was only one fitting part, so there was a difference in temperature. Since there is no difference in registration accuracy, the registration accuracy does not deteriorate even during high-speed operation, and it also has excellent mechanical strength.

In addition, as mentioned above, the fact that there is only one fitting part between one plate cylinder and the other cylinder reduces small vibrations, which makes it less likely to generate noise, is more powerful, and reduces the generation of ink mist. This also helps improve the working environment.

In addition, in this invention, the opening, which often causes failures, is located in one place on one side of the center of the plate cylinder, so that it minimizes metaplastic changes and malfunctions of sliding parts caused by foreign matter entering the fitting part. It can be done.

Furthermore, the support point of the entire plate cylinder is made up of a shaft protruding from the large diameter end of the plate cylinder and a shaft protruding from the small diameter end of the plate cylinder, which is supported on the inner peripheral surface of the cylindrical shaft. Since the external force applied to the entire plate or a portion thereof is supported directly above the frame in a so-called both-ends support format, there is no risk of local wear and the like, and the life of the plate cylinder device can be extended.

In addition, since the axial register adjustment mechanism and the circumferential register adjustment mechanism can be installed on the outside of both frames,
The frame span can be narrowed, which is advantageous in terms of mechanical strength such as deflection of the plate cylinder and other parts, and is also excellent in terms of cost. Also, since it can be adjusted on the outside of the rotating body, it is also excellent in terms of safety.
The printing surface is not stained by oil or the like, and there is almost no adhesion of water or ink mist, improving the quality of printing and eliminating the occurrence of malfunctions.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, and FIG.
3 is a sectional view of the plate cylinder showing the relationship between the winding lines of the plate, and FIG. 4 is a front view thereof. 2 is a plunket cylinder, 15 is a plate cylinder, 15' is a cylinder, 15
g+154 is the axis of the plate cylinder, 2: is the axis of the cylinder.

Claims (1)

[Claims] One side of the plate cylinder of the printing press in the axial direction has a stepped small diameter, and a shaft is provided protruding from both ends of the large diameter part and the small diameter part of the plate cylinder, and a bottomed cylindrical shape is provided in the small diameter part. A cylinder with a fixed axis,
The shaft at the end of the small diameter portion of the plate cylinder is supported on the inner circumferential surface of the shaft of the cylinder, and is fitted so as to be able to constantly rotate and slide in the axial direction, and the shaft at both ends of the plate cylinder and the axis of the cylinder A plate cylinder device for a rotary printing press, characterized in that the plate cylinder and the cylinder are supported by a frame, and the plate cylinder and the cylinder are interlocked and connected to a plunket cylinder so that they can rotate and move in the axial direction separately.