JP2002054626A - Rotation roll system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple and inexpensive rotation roll system capable of controlling deflection. SOLUTION: This rotation roll system is provided with a rotation roll including support shafts 12a, 12b and housing 13a, 13b supporting the support shafts 12a, 12b. The housing 13a, 13b are arranged on bases 14a, 14b through shims 19. The housing 13a, 13b, therefore support the corresponding support shafts 12a, 12b upward and deflect the rotation roller upward. A downward deflection of the rotation roll 11 from own weight thereof, thereby is canceled and the rotation roll 11 as overall rotates without deflection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll system having a rotary roll such as a printing plate cylinder or a coater, and more particularly to a rotary roll system capable of minimizing the deflection of the rotary roll.

[0002]

2. Description of the Related Art Conventionally, there has been known a rotary roll system including a rotary roll having a support shaft provided at both ends and a pair of housings supporting the support shaft of the rotary roll.

[0003] During use, the rotating roll bends due to its own weight, so that when the rotating roll is a printing plate cylinder, printing becomes uneven, and when the rotating roll is a coater, there arises a problem of uneven thickness of the coating film.

In order to solve such a problem, it has been considered to increase the diameter of the rotating roll or to manufacture the rotating roll using a material having high strength. As shown in FIG. 5, the rotating roll 11 is filled with a pressurized fluid 11a, and the rotating roll 11 is pressed from the inside by the pressurized fluid 11a to eliminate the deflection of the rotating roll 11.

[0005]

As described above, when the diameter of the rotating roll 11 is increased or when the rotating roll is made of a material having high strength, the manufacturing cost of the rotating roll 11 becomes high.

On the other hand, a pressurized fluid 11a
, The internal structure of the rotating roll 11 is complicated. When the pressurized fluid 11a is filled in the rotating roll 11, a roll temperature control mechanism or the like cannot be incorporated in the rotating roll 11.

[0007] The present invention has been made in view of the above points, and an object of the present invention is to provide a rotating roll system that can prevent the bending of the rotating roll with an inexpensive and simple structure.

[0008]

SUMMARY OF THE INVENTION The present invention comprises a rotating roll having a supporting shaft provided at both ends, and a pair of housings for supporting each supporting shaft of the rotating roll, wherein the rotating roll is deformable. Each housing supports a corresponding support shaft such that the support shaft is directed upward, whereby the rotary roll is deformed upward as a whole.

According to the present invention, the corresponding support shaft is supported upward by each housing, whereby the rotary roll can be deformed upward as a whole. For this reason, the downward bending and eccentricity of the rotating roll due to its own weight are offset, and the rotating roll can be rotated without bending and without eccentricity.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are views showing an embodiment of a rotating roll system according to the present invention,
3 and 4 are views showing a comparative example.

1 (a) and 1 (b), a rotary roll system 10 includes a rotary roll 11 having support shafts 12a and 12b provided at both ends, and each support shaft 12 of the rotary roll 11.
a and a pair of housings 13a and 13b for supporting the respective members 12a and 12b via bearings 18.

The rotating roll 11 comprises a printing plate cylinder or a coater for applying a coating liquid. The rotating roll 11 has a small thickness and can be easily deformed by applying an external force. On the other hand, the pair of support shafts 12a and 12b are made of a rigid body, and an external force can be applied to the rotating roll 11 from the pair of support shafts 12a and 12b.

A pair of housings 13a and 13b
Bases 14a, 1 supported on posts 15a, 15b, respectively
4b. Further, the support shafts 12a, 12
The support shaft 12b on one side of b is connected to a drive motor 17 via a coupling 16 provided on a support 15b.

As shown in FIGS. 1 (a) and 1 (b), a shim 19 is interposed between the bases 14a and 14b and the housings 13a and 13b. 13b is the corresponding support shaft 12
a and 12b are supported so as to face upward. By supporting the supporting shafts 12a and 12b upward by the housings 13a and 13b, the rotating roll 11 can be deformed upward as a whole. Here, FIG. 1B is an enlarged view of a portion B in FIG. 1A.

Next, the operation of the embodiment having the above-described configuration will be described. In FIGS. 1A and 1B,
The rotational driving force from the driving motor 17 is applied to the coupling 16.
Is transmitted to the support shaft 12b via the support shaft 12b, and the rotating roll 11 is rotated by the rotational force of the support shaft 12b to perform a printing operation or a coating operation of a coating liquid.

During this time, the housing 13a, 13b supports the support shafts 12a, 12b upward, so that the rotary roll 11 is deformed upward as a whole. Thus rotating roll 11 can be rotated without bends around the center line L _1, it can be performed with high accuracy printing operation or coating operation.

That is, when the support shafts 12a and 12b of the deformable rotary roll 11 are supported in the horizontal direction as usual, the rotary roll 11 is bent downward by its own weight as shown in a comparative example shown in FIG. I will. As a result, the printing operation or the coating operation by the rotating roll 11 is hindered. However, according to the present embodiment, the deflection of the rotating roll 11 due to its own weight is canceled by deforming the rotating roll 11 as a whole to move upward. Accordingly, the rotating roll 11 can be rotated without bending.

Also, shims 19 are provided on the bases 14a and 14b.
With a simple structure for inserting the rotating roll 11, the bending of the rotating roll 11 can be suppressed, and it is not necessary to increase the thickness of the rotating roll 11 to prevent the bending of the rotating roll 11, so that the manufacturing cost is reduced. be able to.

Next, a modification of the present invention will be described with reference to FIG. FIG. 2 is a diagram showing a modification of the present invention, and FIG. 4 is a diagram showing a comparative example.

The modified example shown in FIG. 2 is different from the embodiment shown in FIG. 1 only in that the rotary roll 11 is constituted by a roll which is eccentric in an inverted crown shape due to its own weight.

That is, as shown in FIG.
1, the support shaft 12a in a conventional manner, when supporting the 12b horizontally, causes eccentric reversed crown shape by the weight of the rotating roll 11, the center line L ₁ of the rotating roll 11 and the rotation center L ₂ is canceled I do.

On the other hand, as shown in FIG.
13a, 13b point the support shafts 12a, 12b upward.
By supporting as described above, the rotating roll 11 is
Then, it can be deformed upward. others
Center line L of the rotating roll 11 ₁And rotation center L₂Matches
Then, the rotating roll 11 can rotate without bending.
Wear.

[0023]

As described above, according to the present invention, the bending and eccentricity of the rotating roll can be prevented with a simple structure and at low cost. For this reason, a printing operation or a coating operation using the rotating roll can be performed with high accuracy.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of a rotating roll system according to the present invention.

FIG. 2 is a schematic view showing a modified example of the rotating roll system according to the present invention.

FIG. 3 is a diagram showing a modification of the rotating roll system.

FIG. 4 is a diagram showing a modification of the rotating roll system.

FIG. 5 is a diagram showing a conventional rotating roll.

[Explanation of symbols]

 Reference Signs List 10 rotating roll system 11 rotating roll 12a, 12b support shaft 13a, 13b housing 14a, 14b base 15a, 15b support 16 coupling 17 drive motor 19 shim

Claims (3)

[Claims] 1. A rotary roll having a support shaft provided at both ends, and a pair of housings for supporting each support shaft of the rotary roll, wherein the rotary roll is deformable, and each housing has a corresponding support shaft. The support shaft is supported such that the support shaft is directed upward, whereby the rotary roll is deformed upward as a whole. 2. The rotary roll system according to claim 1, wherein each housing is mounted on the base at an angle such that a corresponding support shaft is directed upward. 3. Between each housing and a corresponding base,
The rotating roll system according to claim 2, wherein a shim is interposed.