JP3148410B2 - Shaftless cylinder holding mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate cylinder holding structure for holding both ends of a printing or coating cylinder with a pair of tapered cones.

[0002]

2. Description of the Related Art Generally, a shaftless cylinder such as a printing or coating plate cylinder has both ends pressed and held by a pair of tapered cones. A drive shaft for driving the shaftless cylinder is fixed to one of the tapered cones, and the other tapered cone is moved by the tapered cone in the axial direction and held by a side mechanism.

[0003] Among these, the side shift mechanism is for moving the other taper cone in the axial direction manually or electrically.

[0004]

The shaftless cylinder for printing or coating is removed from the pair of tapered cones as necessary and replaced with a new shaftless cylinder. When attaching or detaching such a cylinder without a shaft, the side plate mechanism is driven manually or electrically to move the other taper cone in the axial direction, and to move one taper cone in the axial direction to perform the attachment / detachment operation. . Alternatively, only one of the taper cones is moved in the axial direction to perform the demounting operation. Incidentally, the side mechanism has a moving screw for moving the other tapered cone. As described above, since the side mechanism is of the screw drive type having the moving screw, when the moving screw is rotated manually or electrically, it takes a long time to move the shaftless cylinder and to attach and detach the shaftless cylinder. .

The present invention has been made in view of the above points, and provides a shaftless cylinder holding mechanism capable of increasing the axial movement speed of a taper cone and rapidly replacing the shaftless cylinder. The purpose is to:

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided a shaftless cylinder holding structure for holding both ends of a printing or coating shaftless cylinder with a pair of tapered cones. While holding by one drive cylinder, the other taper cone is held by the other drive cylinder which moves this taper cone in the axial direction, and the operating pressure of the other drive cylinder is made larger than the operating pressure of one drive cylinder. When the shaftless cylinder is pressed and held in the axial direction together with the drive cylinder, the other drive cylinder is held movably in the axial direction by the side shift mechanism, and the other drive cylinder reaches the reference point when the other tapered cone reaches the reference point. This is a holding mechanism for a cylinder without a shaft, characterized in that it extends completely and stops.

[0007]

When replacing the shaftless cylinder, the other drive cylinder having a higher operating pressure and the other drive cylinder having a lower operating pressure are driven to retract the pair of taper cones outward and remove the shaftless cylinder. Next, a new shaftless cylinder is arranged between the pair of taper cones, and the other drive cylinder and one drive cylinder are driven to extend the pair of taper cones inward, respectively, and the shaftless cylinder is pressed and held by the pair of taper cones. . In this case, since the operating pressure of the other driving cylinder is higher than the operating pressure of the one driving cylinder, the shaftless cylinder can be positioned with reference to the other tapered cone. Fine adjustment in the axial direction of the shaftless cylinder is performed by moving the other drive cylinder in the axial direction by the side shift mechanism.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing one embodiment of a holding structure for a shaftless cylinder such as a plate cylinder according to the present invention.

In FIG. 1, a printing or coating shaftless cylinder 10 has openings 10a and 10b at both ends thereof, and a pair of tapered cones 1 are formed in the openings 10a and 10b.
1a and 11b are fitted.

One of the pair of taper cones 11a and 11b is held by one drive cylinder 12a such as an air cylinder via a drive shaft 13a, and a cylinder body 15a of the drive cylinder 12a is a gear. It is fixed to the box 20. A drive gear 21 and a driven gear 22 that mesh with each other are provided in the gear box 20. The drive shaft 13 a passes through the driven gear 22, and a key 23 of the drive shaft 13 a is engaged with the driven gear 22. The drive shaft 13a and one tapered cone 11a are movable in the axial direction by one drive cylinder 12a, and the driven gear 22 is fixed in the axial direction. For this reason, when the drive shaft 13a moves in the axial direction, the key 23 of the drive shaft 13a slides in a groove (not shown) formed in the driven gear 22 to be driven by the key 23 of the drive shaft 13a. The engagement of the gear 22 with the groove is maintained. The drive shaft 13a passes through the frame 25a.

Meanwhile, the other tapered cone 10b is held by the other drive cylinder 12b via a holding shaft 13b, and the other drive cylinder 12b has a cylinder body 15b having a screw portion 26 formed on the outer periphery. .
The cylinder main body 15b of the drive cylinder 12b is held by a side mechanism 16 fixed to the frame 25b, and an electric drive unit (not shown) of the side mechanism 16 is engaged with a screw 26 of the cylinder body 15b. The electric drive of the side mechanism 16 allows the cylinder body 15
b moves in the axial direction with respect to the frame 25b.

The area of the working piston (not shown) of one drive cylinder 12a is smaller than that of the other drive cylinder 12a.
b is smaller than the area of the working piston (not shown), so that the working pressure of the other driving cylinder 12b is larger than the working pressure of the one driving cylinder 12a. Also, the holding shaft 1 of the other drive cylinder 12b
The point at which 3b extends toward the shaftless cylinder 10 is the reference point for the other tapered cone 11b.

Next, the operation of this embodiment having the above-described configuration will be described.

When the shaftless cylinder 10 is driven, the driving force from the driving gear 21 is transmitted to the driven gear 22, and the driving force of the driven gear 22 is further transmitted from the key 23 to the driving shaft 13a.
Is transmitted to Then, the shaftless cylinder 10 is rotationally driven by the driving force of the driving shaft 13a via the tapered cone 11a.

Next, the operation of attaching and detaching the shaftless cylinder 10 will be described. First, the other drive cylinder 12b having a large operating pressure is operated to retract the holding shaft 15b and the other tapered cone 11b to the left in FIG. At the same time, one drive cylinder 12a is operated, and the drive shaft 13a and one taper cone 11a are slightly retracted rightward in FIG. Next, the shaftless cylinder 10 is removed from the pair of tapered cones 11a and 11b, and a new shaftless cylinder 10 is disposed between the pair of tapered cones 11a and 11b.

Subsequently, one of the driving cylinders 12a having a low operating pressure and the other driving cylinder 12b having a high operating pressure are driven to drive a pair of tapered cones 11a, 11b.
Are moved inward, and a pair of taper cones 11a, 1a
1b is fitted into the openings 10a and 10b of the shaftless cylinder 10, respectively.

In this case, since the operating pressure of the other drive cylinder 12b is increased, the holding shaft 13b and the other tapered cone 11b extend inward. The point at which the tapered cone 11b extends inward in this way becomes a reference point of the tapered cone 11b, and the shaftless cylinder 10 is used as a reference for the tapered cone 11b with respect to the other tapered cone 11b.
a is pressed and held.

The fine adjustment of the shaftless cylinder 10 in the axial direction is performed by moving the cylinder body 15b of the other drive cylinder 12b in the axial direction by the electric drive unit of the side mechanism 16, thereby moving the shaftless cylinder 10. It does by doing.

As described above, according to the present embodiment,
When the shaftless cylinder 10 is replaced, the other tapered cone 11b can be moved at a high speed by driving the other drive cylinder 12b having a large operating pressure.
Therefore, the shaftless cylinder 10 can be replaced more quickly than when the taper cone is moved by the side mechanism 16 when replacing the shaftless cylinder. Also, by reducing the operating pressure of one driving cylinder 12b and increasing the operating pressure of the other driving cylinder 12a, the point at which the other tapered cone 11b extends completely inward can be used as the reference point of the tapered cone 11b. it can. Therefore, the axial positioning of the shaftless cylinder 10 can be accurately performed.

[0020]

As described above, according to the present invention,
By driving one drive cylinder and the other drive cylinder and moving a pair of taper cones, the replacement of the shaftless cylinder can be performed, so that the replacement operation of the shaftless cylinder can be performed quickly and easily.
In addition, the shaftless cylinder can be accurately positioned with reference to the other tapered cone, and the sideless mechanism can be used to move the other drive cylinder in the axial direction to perform fine adjustment in the axial direction of the shaftless cylinder. it can.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of a holding structure for a shaftless cylinder according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 No-axis cylinder 11a One taper cone 11b The other taper cone 12a One drive cylinder 12b The other drive cylinder 16 Sideley mechanism

Claims (1)

(57) [Claims] In a holding structure of a shaftless cylinder for holding both ends of a printing or coating shaftless cylinder with a pair of tapered cones, one tapered cone is held by one drive cylinder that moves the tapered cone in the axial direction. At the same time, the other taper cone is held by the other drive cylinder that moves this taper cone in the axial direction, the operating pressure of the other drive cylinder is made larger than the operating pressure of one drive cylinder, and the shaftless cylinder is moved together with the one drive cylinder. Along with pressing and holding in the axial direction, the other drive cylinder is held movably in the axial direction by a side mechanism, and the other drive cylinder extends and stops when the other tapered cone reaches the reference point. A shaftless cylinder holding mechanism.