JPH0976453A - Printing pressure regulator for printing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily engage and remove an eccentric bearing with and from the hole of a frame in a printing pressure regulator for regulating the printing pressure of a printing cylinder. SOLUTION: In the printing pressure regulator for a printing unit having an eccentric bearing 7 for rotatably supporting a printing cylinder and a printing pressure regulating lever 24 for rotating the bearing 7 around its axial center, the lever 24 is disposed between the lever 7a fixed to the bearing 7 and a frame 1, a connector (roller 22) is provided at one of the frame side of the lever 7a and the lever, and a part (groove 25) to be engaged with the connector is provided at the other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing pressure adjusting device applied to a printing cylinder (blanket cylinder, plate cylinder, etc.) of a printing unit.

[0002]

2. Description of the Related Art FIG. 6 and FIG. 7 show a contact pressure (hereinafter referred to as printing pressure) between a pair of blanket cylinders of a vertical double-sided printing unit.
An example of a conventional printing pressure adjusting device for a printing unit to which is added.

In FIGS. 6 and 7, 1 is a frame of a vertical double-sided printing unit, 2a and 2b are an upper blanket cylinder and a lower blanket cylinder, 3a and 3b are an upper plate cylinder and a lower plate cylinder, respectively. Shafts 4 on both sides of the blanket cylinder 2b
Is rotatably supported by an eccentric bearing 7 having an eccentric amount e.

The printing pressure adjusting device 6 for adjusting the printing pressure between the pair of blanket cylinders 2a and 2b includes an eccentric bearing 7 for supporting the shafts 4 on both sides of the blanket cylinder 2b, and a printing pressure fixed to the eccentric bearing 7. It is composed of an adjusting lever 8 and a printing pressure adjusting screw 9. To adjust the printing pressure, the printing pressure adjusting lever 8 is swung by the printing pressure adjusting screw device 9 as shown by the arrow in FIG. 6 to rotate the eccentric bearing 7, and the center C _{1 of the} shaft 4 is adjusted to the eccentric bearing 7. performed by moving around the center C _2. Due to this movement, the center distance between the blanket cylinders 2a and 2b changes, and the printing pressure changes. The increase or decrease at the tip of the arrow in FIG. 6 indicates the swinging direction of the printing pressure adjusting lever that increases or decreases the printing pressure.

On the blanket cylinder, as shown in FIG.
A generally used plate-shaped blanket 10a is wound, and a cylindrical blanket 10 shown in FIG.
Some have been inserted.

The tubular blanket 10 is replaced with the blanket cylinder 2
When one of the eccentric bearings 7 is inserted into the bearing attaching / detaching device 11 (Japanese Patent Application No. 05-00951) shown in FIG.
(Shown in FIG. 2), the cylindrical blanket 10 is inserted into the blanket cylinder 2 through the hole 1a.

The bearing attaching / detaching device 11 includes a mount 12 and a mount 12.
It is constituted by an actuator 13 fixedly mounted on the eccentric bearing 7 and a bearing extracting member 14 that engages with the outer peripheral portion of the eccentric bearing 7, and while maintaining the phase of the eccentric bearing 7 in the circumferential direction, It can be inserted and removed.

[0008]

In the above-mentioned plate-like blanket that has been used conventionally, a blanket winding device for winding the blanket around the blanket cylinder must be provided in the circumferential portion of the blanket cylinder. To insert the blanket, as shown in FIG. 6, a gap 10b of the blanket cylinder is generated, and this gap 10b causes a portion (length) in the traveling direction of the paper on which the printing cannot be performed, resulting in waste (waste paper). ). Therefore, cylindrical blankets have recently been used which do not require a gap to be provided in the blanket cylinder.

However, in the conventional printing pressure adjusting device for the printing unit, since the printing pressure adjusting lever is fixed to the eccentric bearing, it is possible to remove the eccentric bearing in order to make a hole in the frame for inserting the cylindrical blanket. It is not easy, and automation of tubular blanket replacement is difficult.

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems and provide a printing pressure adjusting device for a printing unit, which facilitates mounting and dismounting of an eccentric bearing.

[0011]

The present invention provides a printing pressure adjusting device for a printing unit, comprising an eccentric bearing for rotatably supporting a printing cylinder and a printing pressure adjusting lever for rotating the eccentric bearing. The printing pressure adjusting lever is arranged between a lever fixed to the frame and a frame, and the engaging body is movable to either one of the frame side of the lever and the printing pressure adjusting lever and the engaging body is movable to the other. It is characterized in that the fitting portions are provided so as to be engageable with and disengageable from each other.

In the present invention, one of the lever fixed to the eccentric bearing and the printing pressure adjusting lever arranged between the lever and the frame is provided with an engaging body, and the other is movably fitted with the engaging body. Since the respective portions are provided so as to be engageable with and disengageable from each other, the eccentric bearing and the printing pressure adjusting lever can be engaged and disengaged when the eccentric bearing is inserted into and removed from the hole of the frame. Therefore, when the eccentric bearing is inserted into and removed from the frame hole while maintaining the circumferential phase of the eccentric bearing, for example, when a bearing attaching / detaching device as shown in FIG. Since the bearing and the printing pressure adjusting lever are engaged and disengaged, the tubular blanket can be easily replaced with the blanket cylinder automatically.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. The printing pressure adjusting device 21 is fitted in the hole 1a of the frame 1 to rotate the eccentric bearing 7 that rotatably supports the shafts 4 on both sides of the blanket cylinder 2 and the lever 7a fixed to the eccentric bearing 7 to the frame side. A roller 22 (engagement body) that is mounted so that it can be attached to the outer surface 1 of the frame 1.
Printing pressure having a pin 23 fixed to b and a long groove 25 disposed between the outer surface 1b of the frame 1 and the lever 7a and swinging around the pin 23 to fit the roller 22 into one end 24b. The adjusting lever 24 and the other end 24 of the printing pressure adjusting lever 24
and a printing pressure adjusting screw device 9 swingably connected to c.

The printing pressure adjusting lever 24 is the printing pressure adjusting screw device 9.
The groove 25 allows the roller 22 provided on the lever 7a of the eccentric bearing 7 to slide when the eccentric bearing 7 is rotated about the pin 23 to change the printing pressure.
2 is provided so as to extend in the longitudinal direction of the printing pressure adjusting lever 24, as shown in FIG. In addition, the groove 25,
The roller 22 can be easily disengaged and engaged when the eccentric bearing 7 is moved toward the outside of the frame 1 to be pulled out, and the eccentric bearing 7 is moved in the opposite direction to be inserted. In addition, the opposite side of the frame 1 is configured to open.

In this embodiment, in order to insert the tubular blanket 10 into the blanket cylinder 2, the eccentric bearing 7 is pulled out from the hole 1a of the frame, and then the tubular blanket 10 is inserted into the hole 1a as shown in FIG. And insert it into the blanket cylinder 2. At this time, the eccentric bearing 7 can be pulled out, for example, by the bearing attaching / detaching device 11 as shown in FIG. 5 while maintaining the circumferential phase of the eccentric bearing 7. When the eccentric bearing 7 is fitted into the hole 1a, the eccentric bearing 7
The roller 22 in the same position and posture as when the
Inevitably engages the groove 25. When the eccentric bearing 7 is pulled out, the roller 22 of the lever 7 of the eccentric bearing 7 is fitted into the long groove 25 of the printing pressure adjusting lever 25 so as to be detachable and engageable in the direction to be pulled out and fitted into the long groove 25 of the printing pressure adjusting lever 25. 7a and the printing pressure adjusting lever 24 are automatically disengaged from each other, so that the eccentric bearing 7 can be easily removed and easily attached.

In this way, in this embodiment, the eccentric bearing 7 can be easily removed from the frame 1 and the tubular blanket 10 can be easily inserted into the blanket cylinder 2.

For adjusting the printing pressure, when the printing pressure adjusting screw device 9 moves the position of the other end 24c of the printing pressure adjusting lever 24, the printing pressure adjusting lever 24 swings around the pin 23. The eccentric bearing 7 via the lever 7a by swinging
Can be performed by rotating.

A second embodiment of the present invention will be described with reference to FIG. In the printing pressure adjusting device 26 of the present embodiment, the roller 2 fitted in the groove 25 of the first embodiment of the present invention is used.
Instead of 2, the pin 27 that fits into the long hole 25a is used, and in other respects there is no difference from the first embodiment of the present invention, and the same action and operation as those of the first embodiment of the present invention are provided. The effect can be raised.

In the first and second embodiments of the present invention, the roller 22 or the pin 27 is connected to the printing pressure adjusting lever 24.
On the side, the groove 25 or the hole 25a may be provided on the lever 7a side.

[0020]

In the printing pressure adjusting device for a printing pressure unit of the present invention, the installation and removal of the printing pressure adjusting lever to and from the eccentric bearing are automatically performed at the same time when the eccentric bearing is inserted into and removed from the hole of the frame. , It became easy to replace the cylindrical blanket, and the replacement was automated.

[Brief description of drawings]

FIG. 1 is a plan view of a printing pressure adjusting device for a printing unit according to a first embodiment of the present invention.

FIG. 2 is a side view of the same embodiment.

FIG. 3 is a plan view of a printing pressure adjusting device for a printing unit according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a state in which a tubular blanket is inserted into a blanket cylinder.

FIG. 5 is a plan view of a bearing attaching / detaching device (Japanese Patent Application No. 05-00951).

FIG. 6 is a side view of a conventional printing pressure adjusting device for a printing unit.

FIG. 7 is a plan view of the conventional printing pressure adjusting device for a printing unit.

[Explanation of symbols]

 1 frame 1a hole 2 blanket cylinder 7 eccentric bearing 7a lever 9 printing pressure adjusting screw device 10 cylindrical blanket 21 printing pressure adjusting device 22 roller (engaging body) 23 pin 24 printing pressure adjusting lever 25 groove 26 printing pressure adjusting device 27 pin

Claims (1)

[Claims] 1. A printing pressure adjusting device for a printing unit, comprising: an eccentric bearing for rotatably supporting a printing cylinder; and a printing pressure adjusting lever for rotating the eccentric bearing. A lever and a frame fixed to the eccentric bearing. The printing pressure adjusting lever is disposed between the lever and the frame, the engaging body is fitted to either one of the frame side of the lever and the printing pressure adjusting lever, and the other portion is movably fitted to the engaging body. In this case, a printing pressure adjusting device for a printing unit, which is detachably provided.