JP2761151B2 - Printing roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing roll for attenuating bending vibrations induced by rolling of a printing press roll.

[0002]

2. Description of the Related Art It is known to provide an additional vibration system in a roll for absorbing vibration as a printing roll of this kind, as disclosed in Japanese Patent Publication No. 3-20343, for example. As shown in FIG. 11, the present invention relates to a damping rod 12 serving both as a spring element and a weight, and a damping substance 1 having only a damping element.
3, 15 and the damping system and the spring system are made of different substances. The damping rod 12 having the weight element is fixed at the center to the roll.

[0003]

The above-mentioned known additional vibration system is complicated, such as fixing the damping rod inside the roll and enclosing a liquid or a similar damping substance (absorbing vibration energy), and is difficult to apply to an actual machine. It is. The present invention has been developed to address such a problem, and has an object of simplifying the structure and facilitating incorporation into an actual machine.

[0004]

The construction of the present invention for achieving the above object will be described with reference to FIGS. 1 to 10 corresponding to the embodiment. In a printing roll on which a force fluctuating acts, a box-shaped space 4 is provided at the center of the printing roll 1, and a member 5 having a spring element and a damping element in the space 4.
The weight 6 is disposed via the.

[0005]

According to the present invention, the member having the spring element and the damping element can be made of a single material by the above means, so that the mounting of the material is facilitated. Since it has a structure floating from a roll via a substance having the following, it can be easily incorporated into an actual machine.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Reference numeral 1 denotes a printing roll composed of a blanket cylinder, and a blanket 3 is wound around a surface thereof via a fastening device 2. A box-shaped space 4 is provided at the center thereof,
A weight 6 is disposed in the space 4 via a member 5 having a tubular rubber spring element and a damping element. The natural frequency of the weight 6 and the member 5 in a direction perpendicular to the axial direction is: Printing roll 1
And the natural frequency of bending. In the drawing, reference numeral 7 denotes a fixing jig for the member 5.

FIGS. 4 and 5 show a second embodiment of the present invention. In this case, in order to make the bending rigidity of the printing roll 1 comprising a blanket cylinder equal to that of a conventional blanket cylinder, a plurality of weights 6 are provided. It was divided and arranged. FIG. 6 shows a third embodiment of the present invention, in which a member 5 having a spring element and a damping element is formed in a rectangular tube shape, and the rectangular tube member 5 is attached to the center of the printing roll 1. It was arranged in the provided box-shaped space 4.

FIG. 7 shows a fourth embodiment of the present invention, in which a member 5 having a spring element and a damping element is divided into a plurality of pieces, and is radiated into a box-shaped space provided at the center of the printing roll 1. It was arranged in. FIG. 8 shows a fifth embodiment of the present invention, in which the member 5 having a spring element and a damping element is a metal spring having a damping, for example, a leaf spring or a disc spring.
The disc spring was housed in the built-in guide 8 so that the corner of the square weight 6 was supported by the disc spring.

FIGS. 9 and 10 show a sixth embodiment of the present invention, in which a member 5 having a spring element and a damping element comprises:
This was formed into a pair of polygonal cylinders made of rubber, and weights 6 and 6 were disposed at the center of each cylinder, respectively, and each cylinder was housed in a built-in guide 8 to facilitate its assembly. .

[0010]

As described above, according to the present invention, a box-shaped space is provided at the center of the printing roll, and a weight is disposed in the space via a member having a spring element and a damping element. Therefore, a member having a spring element and a damping element for supporting the weight attenuates the vibration of the roll, and the member may be made of one material and wrap the weight or apply it to a part of the weight. This has the effect of facilitating the incorporation into the actual machine.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a plan view excluding a fastening device of FIG. 1;

FIG. 3 is a partially cutaway side view showing a connected state between a member and a weight.

FIG. 4 is a sectional view showing a second embodiment of the present invention.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a sectional view showing a third embodiment of the present invention.

FIG. 7 is a sectional view showing a fourth embodiment of the present invention.

FIG. 8 is a sectional view showing a fifth embodiment of the present invention.

FIG. 9 is a sectional view showing a sixth embodiment of the present invention.

FIG. 10 is a plan view of FIG. 9;

FIG. 11 is a longitudinal sectional view showing a conventional example.

[Explanation of symbols]

 1 printing roll 4 space 5 member 6 weight

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masami Shimizu 5007 Itozakicho, Mihara City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd. Mihara Works (56) References JP-A-62-33645 (JP, A) JP-A-59 -49974 (JP, A) JP-A-59-45321 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B41F 13/08-13/10

Claims (1)

(57) [Claims] 1. A printing roll in which a force that varies in the radial direction from the outside acts due to rolling between the rolls, a box-shaped space is provided in the center of the printing roll, and a spring element and a damping element are provided in the space. A printing roll, wherein a weight is provided via a member having the following.