JP2000264505A - Press roll of web winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press roll capable of being installed in a narrow space and giving a nip pressure of sufficiently large size. SOLUTION: A press roll is composed of a plurality of section rolls 3 arranged in series on a support beam 2, a coupling 14 to couple the section rolls 3 with one another, and a motor to transmit the rotational power to one of the section rolls 3. The arrangement further includes minor diameter coupling shafts 11 formed at the ends of each section roll 3, a pair of bearings 21 fitted on the coupling shafts 11, and a minor diameter supporting cylinder 22 supported by the two bearings 21 and having a smaller diameter than the rolls, wherein the cylinder 22 is furnished in the center with a ring-shaped supporting part 23 having a diameter some smaller than the outside diameter of the rolls, and part of the ring-shaped supporting part 23 is attached to the support beam 2 through a bracket 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a press roll for a web winding device. More specifically, the present invention relates to a press roll for pressing a roll from the outer periphery so that air does not enter a layer of a web roll wound by a web winding device.

[0002]

2. Description of the Related Art As a press roll for holding a web roll from the outer periphery, there is one disclosed in Japanese Patent No. 2804858. Although the structure of this press roll is not described in detail, an axis is shown at the center of the roll in the figure, so that it is recognized as a single long roll. By the way, in order to obtain a nip pressure of 200 to 700 N / m required as a press roll by a web winding device having a paper width of about 8 m, if the roll has the above-mentioned conventional structure, the roll diameter is 50
0 mm or more is required. If the roll diameter is smaller than this, the strength is insufficient and the roll deflects, so that a necessary nip pressure cannot be applied.
However, in the web take-up device, various parts such as frames, structural members, and various components are gathered at a portion where a press roll is to be provided, and the installation space is very narrow. Therefore, the press roll may not be provided in practice.

[0003]

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a press roll that can be installed in a small space and can give a sufficient nip pressure.

[0004]

According to a first aspect of the present invention, there is provided a web winder having a press roll for applying a nip pressure to prevent air from entering the web roll. A support beam, a plurality of section rolls arranged in series on the support beam and attached by a support bracket, connecting means for connecting the plurality of section rolls to each other, at least one of the section rolls And a rotary drive for transmitting rotary power to the book.
The press roll of the web winding device according to the second aspect is the first aspect.
In the invention described above, the coupling means is formed at an end of each section roll of the press roll, and a coupling shaft having a diameter smaller than the roll diameter, and a coupling coupling two coupling shafts facing each other. A pair of bearings fitted to both connecting shafts, and a supporting cylinder supported by the pair of bearings and having a diameter smaller than the outer diameter of the roll, and the supporting cylinder has an annular support having a diameter slightly smaller than the outer diameter of the roll at the center. A part of the annular support portion in the circumferential direction is attached to the support beam via a bracket. According to a third aspect of the present invention, in the press roll of the web take-up device according to the second aspect of the present invention, the annular support portion has a cross-sectional shape that becomes narrower toward the outside in the radial direction, and an outer end surface is formed as a flat surface. The outer end of the annular support is located in a gap between the ends of adjacent rolls.

According to the first aspect of the invention, since a plurality of short section rolls are supported by the support beam, if the support beam has a high bending resistance, each section roll can be reduced in diameter. The strength which can give sufficient nip pressure is given. Therefore, it can be configured to be thin as a whole, and can be installed in a narrow installation space. According to the second aspect of the invention, since the connecting shafts of the respective section rolls are connected by the coupling, all the section rolls can be rotated by applying a rotational power to one section roll. In addition, since the supporting cylinder attached to the facing connecting portion of the adjacent rolls via a bearing is smaller in diameter than the outer diameter of the roll, it can be accommodated in the end space of the adjacent roll, and the annular supporting portion provided at the center of the supporting cylinder. Since each section roll is supported only by the outside, the gap between adjacent rolls can be reduced to support each section roll. For this reason, the function as a press roll which expels air from a winding roll can be fully exhibited. According to the third aspect of the present invention, since the annular support portion is tapered outward in the radial direction, the gap between the adjacent roll end surfaces can be reduced.

[0006]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a press roll according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a connecting means of the press roll.

A press roll 1 shown in FIG. 1 includes a support beam 2, a plurality of section rolls 3, a motor 4, and the like. The support beam 2 may be a beam having a cross-sectional shape that is strong against bending and lightweight, and any beam member may be used as long as these conditions are satisfied. The section roll 3 is short, for example, 1
Those having a length of about m are used and arranged in series on the support beam 2. The section rolls 3 are connected to each other by connecting means described later. The motor 4 constitutes a rotation drive unit described in the claims, and this rotation drive unit is provided for rotating the section roll 3 at the same surface speed as the surface speed of the web roll. The motor 4 and the section roll 3 at the end are
Connected by power transmission means such as belts, chains, gears, etc.
When one section roll 3 is rotated, all section rolls 3 rotate.

Next, details of the connecting means will be described with reference to FIG. FIG. 2 is a cross-sectional view in which only the end of the adjacent section roll 3 is enlarged, and shows a portion X in FIG. At the end of each section roll 3, a connecting shaft 11 having a diameter smaller than the roll diameter is formed coaxially.
1 comprises a coupling fitting portion 12 on the distal end side and a bearing fitting portion 13 on the proximal end side.

A connecting shaft 1 for two adjacent rolls 3 and 3
The two coupling shafts 11 and 11 are provided with coupling fitting portions 12 and 12 respectively.
The coupling 14 is fitted. The coupling 14 has two inner cases 15a and 15b and one outer case 1
6 is comprised. The inner case 15a is fitted into one of the coupling fitting portions 12 and connected with a key 17a.
The inner case 15b is fitted to the other coupling coupling portion 12 and coupled by a key 17b. One outer case 16 is fitted to the outside of the two inner cases 15a and 15b, and these are connected by a spline or a key. The two connecting shafts 11 are connected by the coupling 14 having the above structure, and thus the two section rolls 3 are connected.

A pair of bearings 21, 21 are fitted to bearing fitting portions 13, 13 on the base end side of the connecting shaft 11. The support cylinder 22 is fitted outside the two bearings 21 and 21. This support cylinder is a substantially cylindrical member, and both ends thereof are supported by the two bearings 21 and 21. The outer diameter of the support cylinder 22 is smaller than the outer diameter of the section roll 3 and is accommodated in the cavity at the end of each section roll 3.

At the center of the support tube 22, there is provided an annular support portion 23 formed in an annular shape. The annular support portion 23 has a substantially trapezoidal cross-sectional shape, and gradually becomes narrower outward in the radial direction. Further, an outermost edge of the annular support portion 23 has an annular disk portion having a small rectangular cross section.
23a is formed, and the outer end surface of the annular disk portion 23a is formed as a flat surface. The outer diameter of the annular disk portion 23a is slightly smaller than the outer diameter of the section roll 3, for example, 1 to 5 mm smaller. The ends of the roll cylinders 3a constituting the roll outer shape of each section roll 3 protrude axially outward from the bosses 3b at both ends of each section roll 3, and come very close to the annular disk portion 23a. , Leaving only a small gap. A part of the annular disk portion 23a in the circumferential direction is
And is attached to the support beam 2 via the. The annular support portion 23 may be divided into two parts at the center for convenience of assembly, and may be connected with appropriate bolts or pins.

According to the above-mentioned connecting means, the coupling 14 for transmitting power between the section rolls 3 and 3 and the support cylinder 22 for supporting the section rolls 3 are separate members, so that power is applied to the support cylinder 22. Instead, it is possible to make the annular support portion 23 as small as possible. As a result, the gap between the roll cylinders 3a of the adjacent rolls 3 can be made very narrow, so that a continuous nip pressure can be applied to the entire width of the web roll. In addition, since the slightly opened gap is filled with the annular disc portion 23a, the air discharging action from the web roll is not inferior, and since the roll diameter is slightly smaller than the section roll 3, the surface of the web roll may be damaged. There is no.

Since the above-mentioned structure using the support beam 2 is adopted, the support beam 2 is formed into a
By adopting a cross-sectional shape with high bending resistance such as shape and box shape,
Since the support beam itself can be made thinner and the projected cross section including the section rolls 3 can be made smaller, it can be mounted even in a narrow installation space, and can apply a necessary and sufficient nip pressure. Become.

[0014]

According to the first aspect of the present invention, if a support beam having a high bending resistance is employed, a sufficient nip pressure can be provided even if each section roll has a small diameter, and the support beam becomes thinner as a whole. Can be configured and can be installed in narrow installation spaces. According to the invention of claim 2, all the section rolls can be rotated by applying rotational power to one section roll, and the supporting cylinder attached via a bearing to the connecting portion of the adjacent rolls facing each other is provided. Since the diameter is smaller than the outer diameter of the roll, it can be accommodated in the end space of the adjacent roll and is supported outside only by the annular support portion provided at the center of the support cylinder, so that the gap between adjacent rolls is reduced, Each section roll can be supported.
For this reason, the function as a press roll which expels air from a winding roll can be fully exhibited. According to the third aspect of the present invention, since the annular support portion is tapered outward in the radial direction, the gap between the adjacent roll end surfaces can be reduced. Further, since the outer end surface is a flat surface, there is no damage even when it comes into contact with the surface of the web roll.

[Brief description of the drawings]

FIG. 1 is a front view of a press roll according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a connecting means of a press roll.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Press roll 2 Support beam 3 Section roll 11 Connecting shaft 14 Coupling 21 Bearing 22 Support cylinder 23 Annular support part

Claims (3)

[Claims] In a web take-up device provided with a press roll for applying a nip pressure so that air does not enter the web roll, the press roll is arranged in series on a support beam and on the support beam. It comprises a plurality of section rolls attached by brackets, connecting means for connecting the plurality of section rolls to each other, and a rotation drive unit for transmitting rotational power to at least one of the section rolls. Press roll for web take-up device. And a coupling formed at an end of each section roll of the press roll and having a diameter smaller than the diameter of the roll, and a coupling for coupling the two coupling shafts facing each other. A pair of bearings fitted to both connecting shafts, and a supporting cylinder supported by the pair of bearings and having a diameter smaller than the outer diameter of the roll, and the supporting cylinder has an annular support having a diameter slightly smaller than the outer diameter of the roll at the center. The press roll of a web take-up device according to claim 1, wherein a portion is formed, and a part of the annular support portion in a circumferential direction is attached to the support beam via a bracket. 3. The annular support portion has a cross-sectional shape that becomes narrower toward the outside in the radial direction, and an outer end surface is formed as a flat surface, and an outer end portion of the annular support portion is adjacent to an end of a roll. The press roll for a web take-up device according to claim 2, wherein the press roll is located in a gap between the press rolls.