JPH0311623B2 - - Google Patents

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, plates can be attached separately to the left and right sides in the axial direction on one plate cylinder. The present invention relates to a plate cylinder device capable of finely adjusting the left and right printing plates of a so-called double-format printing press individually during operation.

PRIOR TECHNOLOGY This type of plate cylinder device is used when a single plate makes the plate width too wide, the plate becomes large and difficult to handle, or when the factory does not have the plate making capacity. The above problem was solved by halving the size of the plates by arranging them in two rows, but in this case, the mounting parts of the left and right plates are generally shifted in phase by a certain distance on the circumference, and each mounting part of the left and right plates is The printing paper is stabilized by preventing the printing pressure from escaping at the same time.

However, in the above-mentioned conventional plate cylinder device, the respective registers of the left and right plates are adjusted by using a lateral register adjustment device or a circumferential register adjustment device only on either the left or right side. It is common to make corrections or adjustments to the 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, using the left-right register adjustment device or the circumferential direction register adjustment device. On the other side, when the plate is attached to the plate cylinder, misregistration cannot occur in the case of printing each color due to accuracy errors in plate making or 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 manually moving the plate, 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, and the adjustment amount for both plates may be different. Adjustment requires 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. 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 to the integrated plate cylinder. However, 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 is disadvantageous in terms of mechanical strength and cost, and the adjustment must be made near the high-speed rotating body, which is extremely dangerous.
Furthermore, there are other disadvantages such as deterioration in printing quality due to oil staining the printing surface and the tendency for malfunctions to occur due to adhesion of water, ink mist, etc.

Means and actions for solving the problems In order to solve the various problems mentioned above,
In this invention, the basic structure of the plate cylinder is that the plate cylinder is divided into two in the axial direction left and right at the central part of the plate cylinder, into a plate 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, and a shaft is provided protruding from both ends of the large diameter part and the small diameter part of the plate cylinder, and the small diameter part is provided with a shaft. , a cylinder to which a bottomed cylindrical shaft is fixed is fitted such that it can constantly rotate and slide freely in the axial direction, with the shaft at the end of the small diameter part of the plate cylinder being supported on the inner peripheral surface of the shaft of the cylinder. , a rotary printing machine in which the shafts at both ends of the plate cylinder and the shaft of the cylinder are supported by a frame, and the plate cylinder and cylinder are interlocked and connected to a blanket cylinder so that they can rotate and move in the axial direction separately. The present invention provides a plate cylinder device in which the plate cylinders and cylinders constituting the plate mounting portions divided into left and right axial sides are installed, and even during operation, fine movements can be made in the circumferential direction and the axial direction. Adjustments can be made very easily and in a short time.

In addition, the fact that 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 increases registration accuracy, reduces noise generation, improves mechanical strength, and improves safety. This also improves printing quality.

Embodiment The configuration will be described below based on an embodiment shown in the drawings.

As shown in Fig. 1, the plate cylinder is formed in a step-like manner at the center of the machine, that is, it is divided into a large-diameter cylindrical portion 15 ₁ and a small-diameter cylindrical portion 15 ₂ in the axial direction from the center to the left and right. A plate 16 is attached to the outer peripheral surface of a large diameter cylindrical portion 15 ₁ of the plate cylinder 15, and the plate cylinder 15 has a shaft 15 ₃ at the end of the large diameter portion.
is installed protrudingly. The small-diameter cylindrical portion (hereinafter referred to as small-diameter portion) 15 ₂ serves as a supporting portion, and has a shaft 1 at the end.
5 ₄ protrudingly provided, and a cylinder 15 _' having an outer circumferential surface having the same diameter as the outer circumferential surface of the plate cylinder 15 and having a bottomed cylindrical shaft 21 on one side is provided on the supporting portion 152. The shaft at the end of the small diameter portion of the plate cylinder 15 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. 15 and cylinder 15' form the entire plate cylinder. Note that the plate 17 is attached to the cylinder 15'.

As shown in FIGS. 3 and 4, the plates 16 and 17 have their mounting portions 18 and 19 shifted in phase from each other. A plurality of grooves 20 are cut into the inner surface of the cylinder 15' so that the resistance of fitting the cylinder 15' to the plate cylinder 15 is reduced.

The end of the cylinder 15' is one end (left end) of the plate cylinder 15.
It is fixed with several screws 22 to the cylindrical part of a bottomed cylindrical shaft 21 that supports the shaft part 15 ₄ on its inner peripheral surface, and the outer periphery of this shaft 21 is fitted into the frame 5. The shaft 154 at the end of the small diameter portion of the plate cylinder 15 is fitted into the frame ₅ via the shaft 21 of the cylinder 15'. It is held by a roller bearing 24 attached to a sleeve 23. The support shaft 15 ₃ at the other end (right end) of the plate cylinder 15 has a 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 is fixed to the large diameter end of the plate cylinder 3 and meshes with a helical gear 13 fixed to one end of the blanket cylinder 2. Further, a helical gear 28 having the same dimensions as the helical gear 13 is fixed to the other end of the blanket body 2.

An external gear 29 is fixed to the shaft 21 with a key and a nut, and an internal gear 30 is fitted to the external gear 29. The internal gear 30 is fixed to a gear coupling 31, and a retaining plate 32 is attached to the opposite surface thereof. Gear cut spring 3
A helical gear 33 on the driven side that meshes with the helical gear 28 on the driving side is fixed to the drive gear 1 . This driven side helical gear 33 has the same dimensions as the driven side 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 the external gear 29 and the internal gear 30 so as to be movable in the axial direction. 28 and 33, it is designed to be rotationally driven separately from the plate cylinder 3.

A cylindrical member 34 that fits on the shaft 21 is fixed to the gear coupler 31 with bolts, and an angular contact bearing 35 is attached to this cylindrical member 34.
A rotary sleeve 36 having gears provided on its outer periphery is fitted and supported via the rotary sleeve 36 . The outer ring and inner ring of the angular contact bearing 35 are connected to the presser foot 3.
It is fixed at 7,38. The rotary sleeve 36 has a thread on its outer periphery without gears, which is screwed into a ring 40 fixed to the bracket 39.
Note that the bracket 39 is fixed to the frame 5. In fitting the shaft 21 and the frame 5, the shaft 2
The roller bearing 24 fitted in
The sleeve 23 is fixed to the frame 5, and its outer periphery is fitted into a sleeve 23 fixed to the frame 5 so as to be slidable 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 a shaft 46.
The shaft 46 is supported in brackets 39,47. Another gear 48 is fixed to the other end of this shaft 46, and a drive gear 49a driven by a motor 49 that rotates in forward and reverse directions meshes with this gear 48. The drive gear 49a also includes a detection gear 5 connected to a rotation speed detection device 50 such as a potentiometer.
1 is engaged.

On the other hand, a bearing member 52 is concentrically fixed to the shaft end of the shaft 21, and one end of a shaft 53 is rotatably and axially engaged with the bearing member 52.
The shaft 53 has a ring 55 fixed to a bracket 54.
and is engaged in the rotational direction with a key 56, making it slidable in the axial direction. A screw 57 is provided at the other end of the shaft 53, and a gear 58 and a locking fitting 59 fixed thereto are screwed into the screw 57. The end faces of the gear 58 and the locking fitting 59 are supported in the axial direction by the ring 55 and the lid 60 of the bracket 54 via thrust bearings. The gear 58 is meshed with a gear 62 driven by a motor 61 that rotates in forward and reverse directions. A detection gear 64 coupled to a rotation speed detection device 63 such as a potentiometer is meshed with this gear 58.

In addition, in FIG. 1, the shaft bearing portion of the plate cylinder 15 is
This plate cylinder 15 has exactly the same structure as the shaft bearing part of the cylinder 15', and can be finely adjusted in the circumferential direction and the axial direction.

In the above configuration, by rotating the drive shaft 8, the common impression cylinder 1 is rotated via the bevel gears 10, 11, and thereby the blanket cylinder 2 is rotated. This rotation of the blanket cylinder 2 causes the plate cylinder 1 to
The large diameter side of 5 is rotationally driven by the meshing of helical gears 13 and 14. The cylinder 15' fitted in the small diameter portion of the plate cylinder is connected to a driving side helical gear 28 provided on the other end side of the blanket cylinder 2, a driven side helical gear 33, a gear coupling 31, an internal gear 30, an external gear Shaft 2 via gear 29
1 as well as the plate cylinder 15 at the same rotational speed as the large diameter side of the plate cylinder 15.

At this time, when finely adjusting the cylinder 15' relative to the plate cylinder 15 in the circumferential direction, the rotating sleeve 36 is rotated.

That is, by driving the motor 49, the gears 49a,
When the rotary sleeve 36 is rotated via 48, 45, the rotary sleeve 36 is moved in the axial direction with respect to the bracket 39 by the screw, and the driven side helical gear 33 coupled to the rotary sleeve 36 in the axial direction is moved. is moved in the axial direction. Thus,
This helical gear 33 and the driving side helical gear 2
8 shifts in the axial direction, and the helical gear 33 on the driven side moves in the circumferential direction relative to the driving side due to the action of the helical angle. The cylinder 15' engaged in the rotational direction 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 movement of each is regulated via rotation speed detection devices 50, 63 such as potentiometers.

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

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, and as a result, the plate cylinder and other parts It is very advantageous in terms of mechanical strength such as bending, and it is also advantageous in terms of cost. Furthermore, since adjustments can be made outside of the rotating body, it is superior in terms of safety, and 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. Prevent occurrence.

Effects of the Invention Since this invention is constructed as described above in detail,
With a plate attached to each of the plate mounting sections divided to the left and right in the axial direction, one cylinder is fitted to the other plate cylinder so that it can constantly rotate and slide in the axial direction, so it can be stopped even during operation. Among other things, fine adjustment can be made freely and individually in the circumferential and axial directions, making plate registration much easier and much faster than on conventional double-format printing presses. This method is extremely effective when printing a large number of copies in a short period of time.

In addition, in constructing the plate cylinder, only one plate cylinder and only one half-cylinder on one side that fits into the small diameter part of the plate cylinder are used, so there is only one fitting part, so the temperature difference 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.

Also, as mentioned above, the fact that there is only one fitting part between one plate cylinder and the other cylinder reduces small vibrations, which not only makes it less likely to generate noise, but also reduces the generation of ink mist. It also helps improve the working environment.

And the openings that often cause failures,
In this invention, there is one location on one side of the center of the plate cylinder, so
Chemical changes caused by foreign matter entering the fitting portion and malfunctions of the sliding portion can be minimized.

Furthermore, the support point of the entire plate cylinder is supported by a shaft protruding from the end of the large diameter part of the plate cylinder and a shaft protruding from the end of the small diameter part of the plate cylinder supported by the inner peripheral surface of the shaft of the cylinder. Alternatively, since the external force applied to the portion is supported directly above the frame in a so-called both-end support format, there is no risk of local wear, etc., 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, resulting in less bending of the plate cylinder and other parts. It is advantageous in terms of mechanical strength and is also excellent in terms of cost. In addition, since the adjustment can be made outside the rotating body, it is very safe, and the printing surface is not contaminated by oil or other substances, and there is almost no adhesion of water or ink mist, improving printing quality and preventing failures. This has great effects such as eliminating the occurrence of.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is a structural explanatory diagram of the main parts, Fig. 3 is a sectional view of the plate cylinder showing the relationship between the plate winding opening, and Fig. 4 The figure is its front view. 2 is a blanket cylinder, 15 is a plate cylinder, 15' is a cylinder, 15 ₃ and 15 ₄ are plate cylinder axes, and 21 is a cylinder axis.

Claims (1)

[Claims] 1 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 cylinder is installed in the small diameter part. A cylinder having a fixed shaft is fitted so as to be able to constantly rotate and slide in the axial direction, with the shaft at the end of the small diameter part of the plate cylinder being supported on the inner peripheral surface of the shaft of the cylinder. A rotary printing machine characterized in that the shafts at both ends of the cylinder and the shaft of the cylinder are supported by a frame, and the plate cylinder and the cylinder are interlocked and connected to a blanket cylinder so as to be able to rotate and move in the axial direction separately. Plate cylinder device in a machine.