WO2023059088A1

WO2023059088A1 - Guide roll

Info

Publication number: WO2023059088A1
Application number: PCT/KR2022/015034
Authority: WO
Inventors: 박성민; 김기수; 나세용; 이진수; 오정수; 윤성원
Original assignee: 주식회사 엘지에너지솔루션
Priority date: 2021-10-06
Filing date: 2022-10-06
Publication date: 2023-04-13
Also published as: DE212022000235U1; KR20230049503A

Abstract

A guide roll according to an embodiment of the present invention can guide the transportation of a sheet member. The guide roll may comprise: a shaft; a plurality of rollers which are arranged in the lengthwise direction of the shaft and rotate about the shaft according to the transportation of the sheet member; a first support which supports the shaft, at one side of the plurality of rollers, and restricts the shaft with respect to the lengthwise direction; a second support which supports the shaft, at the other side of the plurality of rollers; and a bending portion which is screw-fastened with one end portion of the shaft on the outer side of the second support and generates a bending momentum on the shaft. The bending portion may comprise: a rotating portion in which one end portion of the shaft is inserted and which is screw-fastened with the shaft; and a handle or a motor for rotating the rotating portion.

Description

guide roll

Mutual Citation with Related Applications

This application claims the benefit of priority based on Korean Patent Application No. 10-2021-0132756 dated October 6, 2021, and all contents disclosed in the literature of the Korean Patent Application are included as part of this specification.

technology field

The present invention relates to a guide roll, and more particularly, to a guide roll for guiding the conveyance of a sheet member.

In general, a secondary battery means a battery that can be charged and discharged, unlike a primary battery that cannot be charged, and is widely used in electronic devices such as mobile phones, laptop computers, and camcorders, or electric vehicles. In particular, since the lithium secondary battery has a higher capacity than a nickel-cadmium battery or a nickel-hydrogen battery and has a high energy density per unit weight, the degree of its utilization is rapidly increasing.

In order to manufacture such a secondary battery, first, an electrode assembly having a predetermined shape is formed by applying an electrode active material slurry to a positive electrode current collector and a negative electrode current collector to prepare a positive electrode and a negative electrode, and then stacking them on both sides of a separator. Then, the electrode assembly is accommodated in the battery case, and the electrolyte is injected and then sealed.

And, in the process of manufacturing the electrode assembly, sheet members such as sheet-shaped electrodes and separators are transported while maintaining tension by a plurality of guide rolls. In addition, in order to prevent wrinkles from occurring in the sheet member during the transfer process, conventionally, spiral grooves are processed in the guide roll to spread the sheet member toward both ends of the guide roll to improve wrinkles.

However, since the conventional guide roll cannot deform the spiral groove, there is a limit in that it is difficult to respond flexibly according to the material or size of the sheet member.

The problem to be solved by the present invention is to provide a guide roll that can effectively improve wrinkles of a sheet member by adjusting the amount of bending.

The guide roll according to the embodiment of the present invention may guide the transfer of the sheet member. The guide roll may include a shaft; a plurality of rollers disposed in the longitudinal direction of the shaft and rotating about the shaft according to the transfer of the sheet member; a first support supporting the shaft at one side of the plurality of rollers and constraining the shaft in a longitudinal direction; a second support for supporting the shaft at the other side of the plurality of rollers; and a bending portion that is screwed to one end of the shaft from an outside of the second support to generate bending momentum in the shaft. The bending part may include a rotating part into which one end of the shaft is inserted and screwed to the shaft; And it may include a handle or a motor for rotating the rotation unit.

The shaft may include a first cutout groove extending in a longitudinal direction of the shaft; and a second cutout groove connected to one end of the first cutout groove, extending in a cross-sectional direction of the shaft, and spaced apart from the bending portion.

The second incision groove may be located between the first support and the plurality of rollers in the longitudinal direction of the shaft.

In the longitudinal direction of the shaft, one end of the first cutout groove is positioned between the plurality of rollers and the first support, and the other end of the first cutout is positioned between the plurality of rollers and the second support. can be located in between.

The second incision groove may extend upward from one end of the first incision groove.

The guide roll may further include a connection portion into which the shaft is inserted and constrained to the first support member in a longitudinal direction of the shaft.

The connecting part may include a hollow part inserted into the first support; and a hooking portion connected to the hollow portion and caught on the first support from an inside of the first support in a longitudinal direction of the shaft.

A fastening groove recessed in a radial direction is formed on the shaft, and a fastening member passing through the locking portion may be fastened to the fastening groove.

A male screw thread may be formed on an outer circumference of one end of the shaft, and a female screw thread corresponding to the male screw thread may be formed on an inner circumference of the rotation unit.

The guide roll may further include a connection body into which the shaft is inserted and connected to the bending part, and which is constrained to the second support member in a longitudinal direction of the shaft.

The bending part may further include a housing coupled to the connecting body while surrounding a portion of an outer circumference of the rotating part.

The connection body may include a main body located outside the second support in the longitudinal direction of the shaft and connected to the bending part; a hollow part protruding from the main body in the longitudinal direction of the shaft and inserted into the second support; and a hooking portion connected to the hollow portion and caught on the second support from an inside of the second support in the longitudinal direction of the shaft.

A guide groove recessed in a radial direction and extending in a longitudinal direction is formed in the shaft, and a guide member passing through the engaging portion may be inserted into the guide groove.

Bushings that tilt according to the bending of the shaft may be provided inside the first support and the second support.

According to a preferred embodiment of the present invention, by bending the shaft acting as a rotation axis of the plurality of rollers, it is possible to remove the wrinkles of the sheet member in contact with the plurality of rollers to guide the conveyance.

In addition, the bending unit may adjust the bending of the shaft by using screw fastening. As a result, compared to the method of directly pushing the shaft, there is an advantage in that the bending of the shaft can be more precisely and reliably controlled.

In addition to this, effects that can be easily predicted by those skilled in the art from configurations according to preferred embodiments of the present invention may be included.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and together with the detailed description of the present invention serve to further understand the technical idea of the present invention, the present invention is the details described in such drawings should not be construed as limited to

1 is a perspective view of a guide roll according to an embodiment of the present invention.

2 is a side view of a guide roll according to an embodiment of the present invention.

3 is a cross-sectional view of a guide roll according to an embodiment of the present invention.

FIG. 4 is an enlarged view of part 'A' shown in FIG. 3 .

FIG. 5 is an enlarged view of part 'B' shown in FIG. 3 .

6 is a view for explaining the action of a guide roll according to an embodiment of the present invention.

FIG. 7 is an enlarged view of part 'C' shown in FIG. 6 .

FIG. 8 is an enlarged view of part 'D' shown in FIG. 6 .

9 is a perspective view of a guide roll according to another embodiment of the present invention.

10 is a cross-sectional view of a guide roll according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited or limited by the following examples.

In order to clearly describe the present invention, parts irrelevant to the description or detailed descriptions of related known technologies that may unnecessarily obscure the subject matter of the present invention have been omitted, and in this specification, reference numerals are added to the components of each drawing. In the specification, the same or similar reference numerals are used for the same or similar components throughout the specification.

In addition, the terms or words used in this specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventor appropriately defines the concept of terms in order to best describe his/her invention. It should be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle that it can be done.

1 is a perspective view of a guide roll according to an embodiment of the present invention, and FIG. 2 is a side view of a guide roll according to an embodiment of the present invention.

The guide roll according to an embodiment of the present invention may guide the transfer of the sheet member 1 . For example, the sheet member 1 may be a sheet-shaped electrode or separator. However, it is not limited thereto, and it is also possible that the sheet member 1 is a base material such as paper, film, fabric, etc., of course.

In more detail, the guide roll may include a shaft 10 (see FIG. 3 ), a plurality of rollers 20 , a pair of

supports

30 and 40 , and a bending part 50 . The guide roll may further include a connecting portion 60 and a connecting body 70 .

The shaft 10 may extend in a direction parallel to the width direction of the sheet member 1 . The shaft 10 may be bent by a bending unit 50 to be described later. Therefore, the shaft 10 is preferably made of a material having a high modulus of elasticity in the bending direction.

A plurality of rollers 20 may be disposed in the longitudinal direction of the shaft 10 . At least some of the plurality of rollers 20 may contact the sheet member 1 . The plurality of rollers 20 may rotate around the shaft 10 according to the transfer of the sheet member 1 .

Each roller 20 may be an idle roller. In addition, a bearing may be provided between the inner circumference of each roller 20 and the outer circumference of the shaft 10 .

A plurality of rollers 20 may be disposed separately from each other. Therefore, when bending occurs in the shaft 10, a fine gap may occur between the plurality of rollers 20, and the shaft 10 may be easily bent.

A pair of

supports

30 and 40 may support the shaft 10 . For example, the pair of

supports

30 and 40 may be universal supports. The pair of

supports

30 and 40 may be spaced apart from the plurality of rollers 20 in the longitudinal direction of the shaft 10 .

In more detail, the pair of

supports

30 and 40 include a first support 30 for supporting the shaft 10 on one side of the plurality of rollers 20 and a shaft on the other side of the plurality of rollers 20 ( 10) may include a second support 40 for supporting. That is, the first support 30 and the second support 40 may be positioned opposite to each other with the plurality of rollers 20 interposed therebetween in the longitudinal direction of the shaft 10 .

The first support 30 may constrain the shaft 10, more specifically, one end of the shaft 10 in the longitudinal direction.

In more detail, one end of the shaft 10 may be inserted into the connecting portion 60 . Also, the connecting portion 60 may be inserted into the first support 30 and constrained to the first support 30 in the longitudinal direction of the shaft 10 .

The shaft 10, more specifically, the other end of the shaft 10 may pass through the second support 40 and be connected to the bending part 50. That is, the second support 40 may be located between the plurality of rollers 20 and the bending part 50 in the longitudinal direction of the shaft 10 .

In more detail, the bending part 50 may be connected to the connecting body 70, and the other end of the shaft 10 may be inserted into the connecting body 70 and connected to the bending part 50. Also, the connection body 70 may be inserted into the second support 40 and constrained to the second support 40 in the longitudinal direction of the shaft 10 .

The bending part 50 may be located outside the second support 40 . The bending unit 50 is connected to the shaft 10 and may generate bending momentum in the shaft 10 . This will be explained in detail below.

Figure 3 is a cross-sectional view of a guide roll according to an embodiment of the present invention, Figure 4 is an enlarged view of 'A' portion shown in Figure 3, Figure 5 is an enlarged view of 'B' portion shown in FIG. 6 is a view for explaining the action of the guide roll according to an embodiment of the present invention, FIG. 7 is an enlarged view of a 'C' portion shown in FIG. 6, and FIG. 8 is an enlarged view of a 'D' portion shown in FIG. It is also

In order to smoothly bend the shaft 10, a first cutout groove 11 and a second cutout groove 12 may be formed in the shaft 10.

The first incision groove 11 may be formed long in the longitudinal direction of the shaft 10 . The length of the first incision groove 11 may be shorter than the length of the shaft 10 . In addition, both ends of the first incision groove 11 may be located outside the plurality of rollers 20 in the longitudinal direction of the shaft 10 . In more detail, with respect to the longitudinal direction of the shaft 10, one end of the first cutout 11 is located between the plurality of rollers 20 and the first support 30, and the first cutout 11 The other end of may be located between the plurality of rollers 20 and the second support (40). Accordingly, the portion of the shaft 10 where the plurality of rollers 20 are disposed can be easily bent.

The second incision groove 12 may be orthogonal to the first incision groove 11 . The second incision groove 12 may be located between the first support 30 and the plurality of rollers 20 in the longitudinal direction of the shaft 10 .

The second cutout groove 12 is connected to one end of the first cutout groove 11 and may extend in the cross-sectional direction of the shaft 10 . In more detail, the second cutout groove 12 may extend upward from one end of the first cutout groove 11 . However, it is obvious that the direction of the second incision groove 12 is not limited thereto, and may vary depending on the direction in which the shaft 10 is to be bent.

The relationship between the direction of the second incision groove 12 and the direction in which the shaft 10 is to be bent may be experimentally determined. For example, the shaft 10 may be bent in a direction in which the second incision groove 12 opens. Therefore, when the second incision groove 12 extends upward, the shaft 10 may be bent upward.

The second incision groove 12 may be spaced apart from the bending part 50 . In more detail, the second incision groove 12 may be connected to one end close to the first support 30 among both ends of the first incision groove 11 . Thus, the shaft 10 can be reliably bent in the intended direction according to the direction of the second incision groove 12 . This is because the shaft 10 is constrained to the first support 30 in the longitudinal direction, so that bending occurs from a portion adjacent to the first support 30.

Meanwhile, the bending unit 50 may generate bending momentum in the shaft 10 by being screwed to the shaft 10 .

In more detail, the bending unit 50 may include a rotation unit 53 screwed to the shaft 10 and a motor 51 rotating the rotation unit 53 . The bending unit 50 may further include a housing 52 surrounding a portion of the outer circumference of the rotating unit 53 .

A hollow into which one end of the shaft 10 is inserted may be formed in the rotating part 53 . A male thread 10a is formed on the outer circumference of the end of the shaft 10, and a female thread 53a corresponding to the male thread 10a is formed on the inner circumference of the rotary part 53, that is, on the inner circumference of the hollow. It can be. Therefore, the male thread 10a of the shaft 10 and the female thread 53a of the rotating part 53 can be screwed together, and as the rotating part 53 rotates with respect to the shaft 10, the rotating part 53 Insertion depth of the shaft 10 into the can be adjusted.

With the above configuration, when the rotating part 53 rotates with respect to the shaft 10 in the set direction, the shaft 10 gradually separates from the rotating part 53 and can receive a force acting toward the first support 30. . However, as described above, since the first support 30 constrains the shaft 10 in the longitudinal direction, the force is converted into bending momentum and the shaft 10 is bent.

The motor 50 may be connected to the rotating part 53 . The motor 50 may be directly connected to the rotation unit 53 or may be connected to the rotation unit 53 through a reduction gear 51a. In order to precisely adjust the rotational angle of the rotating part 53 with respect to the shaft 10, the motor 50 is preferably a servo motor. As a result, the degree of bending of the shaft 10 can be precisely adjusted.

The housing 52 may be fastened to the connection body 70 . A part of the rotating part 53 may be accommodated in the housing 52 and the other part may protrude out of the housing 52 and be inserted into the connecting body 70 . In addition, one end of the shaft 10 may be inserted into the connection body 70 and screwed to the rotating part 53 . That is, the rotating part 53 can rotate with respect to the housing 52 , the connecting body 70 and the shaft 10 .

Compared to the method of directly pushing the shaft 10, the bending unit 50 that adjusts the bending of the shaft 10 by using the screw fastening can control the bending of the shaft 10 more precisely and reliably. There is an advantage.

Meanwhile,

bushings

31 and 41 may be provided inside the first support 30 and the second support 40 . Each of the

bushings

31 and 41 may be tilted according to the bending of the shaft 10 . As a result, bending of the shaft 10 can be performed more smoothly by each of the

bushings

31 and 41 .

In more detail, each of the

bushings

31 and 41 may be tilted in an arc motion around a virtual tilting axis, and the tilting axis is the extension direction of the first cutout groove 11 and the extension of the second cutout groove 12 direction and can be orthogonal to each other.

For convenience of explanation, the bushing 31 of the first support 30 is referred to as a first bushing, and the bushing 41 of the second support 40 is referred to as a second bushing.

The connection part 60 may be inserted into the first bushing 31 and the connection body 70 may be inserted into the second bushing 41 . Accordingly, when the shaft 10 is bent, the connecting portion 60 may be tilted together with the first bushing 31 and the connecting body 70 may be tilted together with the second bushing 41 . Also, tilting directions of the connecting portion 60 and the connecting body 70 may be opposite to each other.

The connecting part 60 may include a hollow part 61 and a hanging part 62 .

The hollow part 61 may be inserted into the first support 30, more specifically, the first bushing 31. Also, the shaft 10 may be inserted into the hollow part 61 . An end of the shaft 10 may be positioned within the hollow portion 61 . However, it is not limited thereto, and it is also possible for the shaft 10 to protrude outward from the first support 30 through the connecting portion 60 , of course.

The hooking part 62 is connected to the hollow part 61 and can be caught on the first support 30 from the inside of the first support 30 in the longitudinal direction of the shaft 10 . In more detail, the hooking part 62 may be formed by extending radially outward from the circumference of the hollow part 61, and may be caught on the first bushing 31. The hanging portion 62 may be integrally formed with the hollow portion 61, but is not limited thereto.

The connecting portion 60 and the shaft 10 may be fastened to each other by a fastening member 69 such as a screw. The fastening member 69 may be fastened to the fastening groove 13 formed in the shaft 10 by penetrating the connection part 60, more specifically, the hooking part 62. The fastening groove 13 may be recessed in the radial direction of the shaft 10 and may face the inner circumference of the engaging portion 62 .

In the longitudinal direction of the shaft 10, the shaft 10 may be constrained to the connecting portion 60 by the fastening member 69, and the connecting portion 60 is connected to the first support 30 by the engaging portion 62. can be bound to Therefore, when the shaft 10 receives a force directed toward the first support 30 by the bending part 50, the force is converted into bending momentum and the shaft 10 can be bent.

Meanwhile, the connection body 70 may include a main body 71, a hollow part 72, and a hooking part 73.

The main body 71 may be located outside the second support 40 in the longitudinal direction of the shaft 10 . The main body 71 may be connected to the bending part 50, more specifically, the housing 52.

The main body 71 has a cylindrical inner space 71a communicating with a hollow part 72 to be described later, and the rotating part 53 of the bending part 50 can be inserted into the inner space 71a. A bearing may be provided between the rotating part 53 and the main body 71 , and the rotating part 53 may smoothly rotate with respect to the main body 71 .

And, the shaft 10 may be inserted into the inner space 71a of the main body 71 through the hollow part 72 of the connecting body 70, and screwed to the rotation part 53 of the bending part 50. can

The hollow part 72 may protrude from the main body 71 in the longitudinal direction of the shaft 10 and be inserted into the second support 40, more specifically, the second bushing 41. The hollow part 72 may pass through the second bushing 41 and protrude into the second support 40 .

The hanging part 73 is connected to the hollow part 72 and can be caught on the second support 40 from the inside of the second support 40 in the longitudinal direction of the shaft 10 . In more detail, the hooking part 73 may be hooked on the second bushing 41 .

In addition, the hooking part 73 may be fastened to the outer circumference of the hollow part 72 . For example, the locking part 73 may be a lock nut fastened to the outer circumference of the hollow part 72 . However, it is not limited thereto, and it is also possible that the engaging portion 73 and the hollow portion 72 are integrally formed.

As the rotating part 53 of the bending part 50 rotates with respect to the shaft 10, the insertion depth of the shaft 10 into the connection body 70 can be adjusted. That is, when the rotating part 53 rotates with respect to the shaft 10 in the set direction, the shaft 10 gradually separates from the rotating part 53 and the connecting body 70, and the force acting toward the first support 30 is reduced. can receive

Movement of the shaft 10 relative to the connecting body 70 may be guided by a guide member 79 . The guide member 79 may be inserted into the guide groove 14 formed in the shaft 10 by penetrating the connecting body 70, more specifically, the hooking portion 73. That is, the end of the guide member 79 may be positioned within the guide groove 14 .

The guide groove 14 may extend in the longitudinal direction of the shaft 10 and may face the inner circumference of the engaging portion 73 .

As the shaft 10 is greatly bent, the end of the guide member 79 may be adjacent to the outer end of the guide groove 14 . The shaft 10 can be bent until the end of the guide member 79 catches on the outer end of the guide groove 14 . That is, the guide member 79 may act as a limiter for limiting bending of the shaft 10 .

In addition, the guide member 79 may limit rotation of the shaft 10 together with the aforementioned fastening member 69 . Therefore, even if the rotating part 53 of the bending part 50 screwed with the shaft 10 rotates, the shaft 10 does not rotate and the insertion depth into the rotating part 53 and the connection body 70 can be adjusted. there is.

Hereinafter, the action of the guide roll according to the present embodiment will be described.

When the motor 51 of the bending unit 50 rotates the rotation unit 53 in the set direction, the rotation unit 53 may rotate with respect to the shaft 10 . Since the rotating part 53 is screwed to the shaft 10, the shaft 10 can be slightly separated from the rotating part 53 according to the rotation of the rotating part 53, and receive force toward the first support 30. can However, since the shaft 10 is constrained to the first support 30 in the longitudinal direction, the force applied to the shaft 10 is converted into bending momentum and the shaft 10 can be bent.

When the shaft 10 is bent, the connection part 60 and the first bushing 31 can be tilted with respect to the first support 30, and the connection body 70 and the second bushing 41 are the second support ( 40) can be tilted. Therefore, the tilting of the shaft 10 can be performed smoothly.

The degree of bending of the shaft 10 can be adjusted according to the degree of rotation of the rotating part 53, and as the shaft 10 is greatly bent, the end of the guide member 79 forms a guide groove 14 formed in the shaft 10. Can be adjacent to the outer end of. The shaft 10 can be bent until the end of the guide member 79 catches the end of the guide groove 14 .

When the shaft 10 is bent, the plurality of rollers 20 disposed on the shaft 10 may spread apart from each other. Accordingly, a width-widening effect may be generated in the sheet member 1 in contact with the plurality of rollers 20, so that wrinkles of the sheet member 1 may be reduced.

9 is a perspective view of a guide roll according to another embodiment of the present invention, and FIG. 10 is a cross-sectional view of the guide roll according to another embodiment of the present invention.

Hereinafter, contents overlapping with those described above will be cited and explained focusing on the differences.

In this embodiment, the bending unit 50' may include a handle 54 instead of a motor. The handle 54 may rotate the rotating part 53, and may be directly connected to the rotating part 53 or connected through an additional coupler or the like.

Therefore, when the operator rotates the handle 54, bending occurs in the shaft 10 screwed to the rotation unit 53, and wrinkles of the sheet member 1 (see FIG. 1) can be removed.

In the case of the present embodiment, there is an advantage in that the configuration of the bending unit 50 is simplified because not only the motor but also parts such as a reduction gear associated therewith are unnecessary.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments.

The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

[Description of code]

1: seat member 10: shaft

11: first cutting groove 12: second cutting groove

13: fastening groove 14: guide groove

20: roller 30: first support

40: second support 50: bending part

51: motor 52: housing

53: rotating part 54; handle

60: connection part 61: hollow part

62: hanging part 69: fastening member

70: connection body 71: main body

72: hollow part 73: hooking part

79: guide member

Claims

As a guide roll for guiding the conveyance of the sheet member,

shaft;

a plurality of rollers disposed in the longitudinal direction of the shaft and rotating about the shaft according to the transfer of the sheet member;

a first support supporting the shaft at one side of the plurality of rollers and constraining the shaft in a longitudinal direction;

a second support for supporting the shaft at the other side of the plurality of rollers; and

A bending portion screwed to one end of the shaft from the outside of the second support to generate bending momentum in the shaft,

the bending part,

a rotating part into which one end of the shaft is inserted and screwed to the shaft; and

A guide roll including a handle or a motor for rotating the rotating part.
According to claim 1,

On the shaft,

a first cutout groove extending in the longitudinal direction of the shaft; and

A guide roll having a second cutout connected to one end of the first cutout, extending in a cross-sectional direction of the shaft, and spaced apart from the bending portion.
According to claim 2,

The second cut groove is a guide roll located between the first support and the plurality of rollers in the longitudinal direction of the shaft.
According to claim 2,

In the longitudinal direction of the shaft, one end of the first cutout groove is positioned between the plurality of rollers and the first support, and the other end of the first cutout is positioned between the plurality of rollers and the second support. Guide rolls located in between.
According to claim 2,

The second incision groove is a guide roll extending upward from one end of the first incision groove.
According to claim 1,

The guide roll further comprises a connecting portion into which the shaft is inserted and constrained to the first support member in a longitudinal direction of the shaft.
According to claim 6,

The connection part,

a hollow part inserted into the first support; and

A guide roll connected to the hollow part and including a hooking portion that is caught on the first support from an inside of the first support with respect to the longitudinal direction of the shaft.
According to claim 7,

A fastening groove recessed in a radial direction is formed on the shaft,

The fastening member penetrating the engaging portion is fastened to the fastening groove.
According to claim 1,

A male thread is formed on the outer circumference of one end of the shaft,

A guide roll in which a female thread corresponding to the male thread is formed on the inner circumference of the rotating part.
According to claim 1,

The guide roll further comprises a connection body into which the shaft is inserted and connected to the bending part and constrained to the second support member in a longitudinal direction of the shaft.
According to claim 10,

the bending part,

A guide roll further comprising a housing coupled to the connection body and surrounding a portion of an outer circumference of the rotation unit.
According to claim 10,

The connecting body,

a body located outside the second support in the longitudinal direction of the shaft and connected to the bending part;

a hollow part protruding from the main body in the longitudinal direction of the shaft and inserted into the second support; and

A guide roll connected to the hollow part and including a hooking portion caught on the second support from an inside of the second support with respect to the longitudinal direction of the shaft.
According to claim 12,

The shaft is depressed in the radial direction and a guide groove extending in the longitudinal direction is formed,

The guide member penetrating the engaging portion is inserted into the guide groove.
According to claim 1,

A guide roll provided with a bushing that is tilted according to the bending of the shaft on the inside of the first support and the second support.