JP7451882B2 - conveyor roller - Google Patents

Description

The present invention relates to a conveyance roller.

2. Description of the Related Art Conventionally, a roller having a bearing installed at an end has been used as a roller for conveying a film. However, when such a roller is used to transport the film, there is a problem in that the rotation of the roller is difficult to follow variations in the transport speed of the film being transported.

For example, a conveyance roller described in Patent Document 1 is known as a device that solves such problems. The conveyance roller described in Patent Document 1 includes a cylindrical shaft and a cylindrical shell disposed to surround the cylindrical shaft.

JP2008-201561A

In the conveyance roller described in Patent Document 1, high-pressure gas is fed into the gap between the cylindrical shaft and the cylindrical shell through an opening provided in the cylindrical shaft, thereby floating the cylindrical shell. It is designed to be able to rotate, thereby making it possible to improve the ability to follow fluctuations in film transport speed.

A fixing ring for fixing the position of the cylindrical shell is installed on the cylindrical shaft of the conveyance roller of Patent Document 1, and the cylindrical shaft is inserted between the fixing ring and the cylindrical shell. Gas flowing through the gap between the body and the cylindrical shell is released ([0035] of Patent Document 1). However, by installing a fixing ring on the cylindrical shaft, movement of the cylindrical shell in the longitudinal direction of the shaft (direction corresponding to the width direction of the transported film) is restricted, so for example When the film being conveyed meanderes or otherwise fluctuates due to force in its width direction, it is difficult for the cylindrical shell material to follow the fluctuations of the film, and the conveyance may become unstable.

The present invention was devised in view of the above-mentioned problems, and it is an object of the present invention to provide a conveyance roller that can perform stable conveyance even when subjected to a force in a direction other than the conveyance direction. With the goal.

The present inventor conducted extensive studies in order to solve the above problems. As a result, the conveyance roller includes a cylindrical inner tube member and a cylindrical outer tube member whose inner diameter is larger than the outer diameter of the inner tube member, and the inner tube member connects the outer tube member with a gap. In a conveyance roller having holes for supplying gas to maintain the state, at least one of the inner cylinder member and the outer cylinder member is penetrated through a groove provided on a surface on the gap side and from the surface on the gap side to the back surface. The present inventors have discovered that the above-mentioned problems can be solved by having a structure with a through hole, or by forming an inner cylinder member with three or more regions in which the gas pressure can be adjusted, and have completed the present invention.
That is, the present invention includes the following.

[1] A cylindrical inner cylinder member,
A conveying roller comprising: a cylindrical outer cylinder member disposed to surround the inner cylinder member,
The outer cylindrical member is a member whose inner diameter is larger than the outer diameter of the inner cylindrical member,
The inner cylindrical member is a member having a hole that supplies gas to hold the outer cylindrical member with a gap,
The inner cylindrical member, the outer cylindrical member, or both of them have a groove portion provided on the surface on the gap side, and a through hole penetrating from the surface on the gap side to the back surface.
[2] A cylindrical inner cylinder member,
A conveying roller comprising: a cylindrical outer cylinder member disposed to surround the inner cylinder member,
The outer cylindrical member is a member whose inner diameter is larger than the outer diameter of the inner cylindrical member,
The inner cylindrical member is a member having a hole that supplies gas to hold the outer cylindrical member with a gap,
The conveyance roller is a roller that conveys a long film,
The inner cylinder member consists of three or more regions arranged in a direction corresponding to the width direction of the film,
A conveying roller capable of adjusting the pressure of the gas in the three or more regions.
[3] The transport roller is a roller that transports a long film,
The inner cylinder member consists of three or more regions arranged in a direction corresponding to the width direction of the film,
The conveyance roller according to [1], wherein the pressure of the gas can be adjusted in the three or more regions.
[4] The inner cylindrical member, the outer cylindrical member, or both have a groove provided on the gap side surface and a through hole penetrating from the gap side surface to the back side surface, [2] ] The conveyance roller described in ].
[5] The conveyance roller according to any one of [1], [3], and [4], wherein the groove portion is provided in an oblique direction with respect to the longitudinal direction thereof.
[6] The groove according to any one of [1], [3], [4], and [5], wherein the groove has a symmetrical shape with respect to the longitudinal center of the member in which the groove is provided. transport roller.
[7] Among the three or more regions of the inner cylinder member, a region corresponding to the center in the width direction of the film is a region where the pressure of the gas is lower than other regions, [2] to [6] ] The conveyance roller according to any one of the above.
[8] The inner cylinder member includes a member made of a porous material,
The conveyance roller according to any one of [1] to [7], wherein the member made of the porous material has an average pore diameter of 10 μm or less.

According to the present invention, it is possible to provide a conveyance roller that can perform stable conveyance even when receiving a force in a direction other than the conveyance direction.

FIG. 1 is a front view schematically showing a conveyance roller according to a first embodiment. FIG. 2 is a front view schematically showing the conveyance roller in a state rotated by 90 degrees from the state shown in FIG. FIG. 3 is a developed view schematically showing a state in which the inner cylinder member shown in FIG. 1 is cut along the line X1-X1 and developed. FIG. 4 is a cross-sectional view schematically showing a cross section taken along the line X1-X1 in FIG. FIG. 5 is a cross-sectional view schematically showing a cross section taken along the line X2-X2 in FIG. FIG. 6 is a front view of the conveyance roller schematically showing the conveyance roller when the outer cylinder member is shifted to the right side. FIG. 7 is a developed view of the inner cylinder member schematically showing the flow of gas in the groove portion in the state shown in FIG. FIG. 8 is a front view of the conveyance roller schematically showing the conveyance roller when the outer cylinder member is shifted to the left side. FIG. 9 is a developed view of the inner cylinder member schematically showing the flow of gas in the groove portion in the state shown in FIG. FIG. 10 is a front view schematically showing a conveyance roller according to the second embodiment. FIG. 11 is a developed view schematically showing a state in which the inner cylinder member shown in FIG. 10 is cut along the line X3-X3 and expanded. FIG. 12 is a front view schematically showing a conveyance roller according to the third embodiment.

Hereinafter, the present invention will be described in detail by showing embodiments and examples. However, the present invention is not limited to the embodiments and examples shown below, and may be implemented with arbitrary changes within the scope of the claims of the present invention and equivalents thereof.

In the following description, a "long" film refers to a film having a length of 5 times or more, preferably 10 times or more, of the width, and specifically a roll A film that is long enough to be rolled up into a shape for storage or transportation. The upper limit of the length of the long film is not particularly limited, and may be, for example, 100,000 times or less the width.

In the present invention, the width direction of a long film is a direction perpendicular to the transport direction of the film and parallel to the surface of the film. The film transport direction is a direction in which a long film is transported by a transport roller, and is usually parallel to the longitudinal direction of the long film.

In the following description, unless otherwise specified, the direction of the elements is "parallel" and "perpendicular" within a range that does not impair the effects of the present invention, for example ±4°, preferably ±3°, more preferably ±1 It may include an error within a range of °.

In the following explanation, "diagonal direction" is neither parallel to the longitudinal direction of the inner cylinder member (direction making an angle of 0° to the longitudinal direction) nor perpendicular to the longitudinal direction (direction making an angle of 90° to the longitudinal direction). Represents direction.

[Overview of the conveyance roller of the present invention]
The conveyance roller of the present invention includes a cylindrical inner tube member and a cylindrical outer tube member arranged to surround the inner tube member. In the present invention, the outer cylindrical member is a member whose inner diameter is larger than the outer diameter of the inner cylindrical member, and the inner cylindrical member has a hole for supplying gas to hold the outer cylindrical member with a gap. It is a member that has. In the present invention, the "state with a gap" is also referred to as the "separated state".

The conveyance roller of the present invention has a configuration in which the inner cylinder member, the outer cylinder member, or both have a groove provided on the gap side surface and a through hole penetrating from the gap side surface to the back surface, The conveyance roller is a roller that conveys a long film, and the inner cylinder member consists of three or more regions arranged in a direction corresponding to the width direction of the film, and the gas pressure can be adjusted in three or more regions. or both configurations.

[Embodiment 1]
The conveyance roller of Embodiment 1 according to the present invention will be described below with reference to FIGS. 1 to 9. FIG. 1 is a front view schematically showing a conveyance roller according to this embodiment. FIG. 2 is a front view schematically showing the conveyance roller in a state rotated by 90 degrees from the state shown in FIG. FIG. 3 is a developed view schematically showing a state in which the inner cylinder member shown in FIG. 1 is cut along the line X1-X1 and developed. FIG. 4 is a cross-sectional view schematically showing a cross section taken along the line X1-X1 in FIG. FIG. 5 is a cross-sectional view schematically showing a cross section taken along the line X2-X2 in FIG. FIG. 6 is a front view of the conveyance roller schematically showing the conveyance roller when the outer cylinder member is shifted to the right side. FIG. 7 is a developed view of the inner cylinder member schematically showing the flow of gas in the groove portion in the state shown in FIG. FIG. 8 is a front view of the conveyance roller schematically showing the conveyance roller when the outer cylinder member is shifted to the left side. FIG. 9 is a developed view of the inner cylinder member schematically showing the flow of gas in the groove portion in the state shown in FIG.

[1. Conveyance roller]
As shown in FIGS. 1 and 2, the conveyance roller 100 of this embodiment includes a cylindrical inner cylinder member 110 and a cylindrical outer cylinder member 120 arranged to surround the inner cylinder member 110. . The outer cylinder member 120 is a member whose inner diameter is larger than the outer diameter of the inner cylinder member 110, and the inner cylinder member 110 holds the outer cylinder member 120 with a gap S1 (see FIG. 4). This is a member that has holes for supplying gas.

In the conveyance roller 100 of this embodiment, the inner cylindrical member 110 has grooves 111A, 111B, 111C, and 111D provided on the surface on the gap S1 side, and through holes 112A and 112B that penetrate from the surface on the gap side to the back surface. , 112C, 112D, and the transport roller 100 is a roller that transports a long film, and the inner cylinder member 110 has three regions 115L, 115M lined up in a direction corresponding to the width direction of the film. , 115R, and has a configuration in which gas pressure can be adjusted in three regions 115L, 115M, and 115R.

[Inner cylinder member]
The outer diameter of the inner cylinder member 110 is smaller than the inner diameter of the outer cylinder member 120, as shown in FIGS. 1 and 2. As shown in FIGS. 4 and 5, the inner cylindrical member 110 has a hole (also referred to as a "gas supply hole") for supplying gas that holds the outer cylindrical member 120 with a gap S1 therebetween. The gas may be introduced into the inner cylinder member 110 from the longitudinal end portion 110A of the inner cylinder member 110, as shown by arrow 1 in FIGS. 6 and 8.

The distance Y1 of the gap S1 between the inner cylinder member 110 and the outer cylinder member 120 is preferably 0.05 mm or more, more preferably 0.10 mm or more, and preferably 1.00 mm or less, more preferably 0.50 mm. It is as follows. By setting the distance Y1 of the gap S1 to be equal to or greater than the above lower limit value, contact between the outer cylinder member 120 and the inner cylinder member 110 can be suppressed. By setting the distance Y1 of the gap S1 to be less than or equal to the above upper limit value, gas can easily flow into the grooves 111A, 111B, 111C, and 111D, and the amount of air consumed can be suppressed.

In this embodiment, the inner cylindrical member 110 has grooves 111A, 111B, 111C, and 111D provided on the surface on the gap S1 side (outer surface) and penetrating from the surface on the gap S1 side to the back surface (inner surface). It has through holes 112A, 112B, 112C, and 112D (see FIGS. 1 to 5).

The groove portions 111A, 111B, 111C, and 111D are partially or entirely covered by the outer cylinder member 120 that is held in a separated state. The gas ejected from the outer surface of the pipe is designed to flow. That is, the groove portions 111A, 111B, 111C, and 111D can be covered by the outer cylinder member 120 that is held in a separated state, thereby forming a flow path for the gas. As shown in FIGS. 6 and 8, the gas that has flowed through the flow path is discharged to the outside from through holes 112A, 112B, 112C, and 112D (see arrow 4). Pipes (not shown) are connected to the through holes 112A, 112B, 112C, and 112D for discharging the gas that has flowed through the grooves 111A, 111B, 111C, and 111D to the outside.

In this embodiment, the shapes of the grooves 111A, 111B, 111C, and 111D are linear shapes extending parallel to the longitudinal direction of the inner cylinder member 110. Through holes 112A, 112B, 112C, and 112D are provided in the longitudinal center of each groove portion 111A, 111B, 111C, and 111D, respectively. In this embodiment, the longitudinal center of each groove 111A, 111B, 111C, 111D corresponds to the longitudinal center 110P of the inner cylinder member 110. The shape of each groove portion 111A, 111B, 111C, and 111D is symmetrical with respect to the longitudinal center 110P of the inner cylinder member 110 (the member provided with the groove portion). By adopting such an aspect, when covered by the outer cylinder member 120 held in a separated state, the gas flow path is formed at a position symmetrical to the longitudinal center of the inner cylinder member 110. sell.

In this embodiment, the groove portions 111A, 111B, 111C, and 111D are provided at equal intervals (every 90°) in the circumferential direction of the inner cylinder member 110. By adopting such an aspect, when covered by the outer cylinder member 120 held in a separated state, the gas flow path can be formed evenly in the circumferential direction of the inner cylinder member 110.

In this embodiment, the inner cylinder member 110 has two types of grooves having different lengths in the longitudinal direction, as shown in FIG. 3 . Specifically, the length in the longitudinal direction of the groove 111A and the groove 111C is longer than the length in the longitudinal direction of the groove 111B and the groove 111D. Groove portions 111A and 111C have the same length, and groove portions 111B and 111D have the same length. As shown in FIG. 3, the long grooves 111A, 111C (also referred to as "long grooves") and the short grooves 111B, 111D (also referred to as "short grooves") are arranged in the circumferential direction of the inner cylinder member 110. are provided alternately.

The effect of the embodiment in which the inner cylinder member 110 has grooves having different lengths in the longitudinal direction will be explained.
When using the conveyance roller, the film is supported and conveyed by the conveyance roller. In such use, the film is normally required to be conveyed along the longitudinal direction without shifting in the width direction; however, for some reason, the film may undesirably shift in the width direction. be. When the outer cylinder member 120 receives a force due to such displacement, the outer cylinder member 120 may be disposed at an undesirably displaced position with respect to the inner cylinder member 110. Here, "the outer cylinder member is placed in a position shifted from the inner cylinder member" means that the outer cylinder member is placed in a position where the longitudinal center of the outer cylinder member does not coincide with the longitudinal center of the inner cylinder member. It means to be done.

When the outer cylinder member 120 is disposed at a position shifted from the inner cylinder member 110 to such an extent that only the long grooves 111A and 111C are exposed, force failure due to gas flow occurs only in the long grooves 111A and 111C. Balance occurs, and a force acts to return the outer cylinder member 120 to a position where the forces are balanced (a position where the longitudinal center of the outer cylinder member coincides with the longitudinal center of the inner cylinder member).

When the outer cylinder member 120 is disposed at a position shifted from the inner cylinder member 110 to such an extent that both the long grooves 111A, 111C and the short grooves 111B, 111D are exposed (see FIGS. 6 and 8), An imbalance of forces (2L1 to 2L4, 2R1 to 2R4) caused by gas flow occurs in both the long grooves 111A, 111C and the short grooves 111B, 111D, and the outer cylinder member 120 is moved to a position where the forces are balanced ( A force is applied to return the outer cylinder member to a position where the longitudinal center thereof coincides with the longitudinal center of the inner cylinder member. In other words, by forming the inner cylinder member 110 with grooves having different lengths, when the degree of displacement of the outer cylinder member 120 with respect to the inner cylinder member 110 becomes large, the outer cylinder member 120 is It is possible to increase the number of grooves that contribute to the action of returning the longitudinal center 120P of the inner cylinder member 110 to a position where it coincides with the longitudinal center 110P of the inner cylinder member 110.

In this embodiment, an embodiment is shown in which there are two types of grooves with different lengths, but it is also possible to have a plurality of grooves with the same length, or three or more types of grooves with different lengths. It may also be an embodiment in which it has.

The width dimension of the groove portions 111A, 111B, 111C, and 111D is preferably 0.5 mm or more, more preferably 2.0 mm or more, and preferably 10 mm or less, more preferably 5 mm or less. By setting the width of the groove to be equal to or greater than the above lower limit, a large amount of gas can flow through the groove, and the force caused by the gas flow can be increased along the groove. Furthermore, by setting the width of the groove to be less than or equal to the above upper limit value, the flow rate of gas flowing into the groove can be increased while suppressing the amount of gas consumed.

The depth of the grooves 111A, 111B, 111C, and 111D is not limited as long as it is equal to or less than the thickness of the member in which the grooves are formed (inner cylinder member in this embodiment), but is preferably 0.5 mm or more, more preferably 1 mm or more. 0 mm or more, preferably 5.0 mm or less, more preferably 2.5 mm or less. By setting the depth of the groove to be equal to or greater than the above lower limit, a large amount of gas can flow into the groove, and the force caused by the gas flow can be increased along the groove. Furthermore, by setting the depth of the groove to be less than or equal to the above upper limit value, the flow rate of gas flowing into the groove can be increased while suppressing the amount of gas consumed.

The shapes of the cross sections of the grooves 111A, 111B, 111C, and 111D in the direction perpendicular to the longitudinal direction are not particularly limited, but examples include rectangular shapes and semicircular shapes. Among these, semicircular shapes are preferred.

The maximum opening diameter of the through holes 112A, 112B, 112C, and 112D is preferably 1.0 mm or more, more preferably 3.0 mm or more, and preferably 15 mm or less, more preferably 10 mm or less. By setting the maximum opening diameter of the through hole to the above lower limit value or more, pressure loss during gas discharge can be reduced, and by setting the maximum opening diameter of the through hole to below the above upper limit value, gas consumption can be suppressed. be able to.

The inner cylinder member 110 of this embodiment may include a member made of a porous material. A part of the inner cylinder member 110 (for example, a part of the inner cylinder member 110 having the gas supply hole) may be made of a porous material, or the entire inner cylinder member 110 may be made of a porous material. may have been done.

Porous materials constituting the member made of porous materials include porous carbon, porous alumina, and the like. When an inner cylinder member including a member made of such a porous material is used, the pressure of the gas ejected from the inner cylinder member 110 (gas supply hole) causes a gap between the outer cylinder member 120 and the inner cylinder member 110. can be held in an open state (separated state).

When the inner cylinder member 110 includes a member made of a porous material, the average pore diameter of the member made of the porous material is preferably 10 μm or less, more preferably 2 μm or less. If the pore size is too large, some pores may be blocked and gas may leak from other pores, but if the pore size is below the upper limit, even if some pores are blocked, gas will not leak. Leakage can be prevented, and the outer cylinder member 120 can be held apart from the inner cylinder member 110 with uniform force. This is presumed to be due to the following mechanism. If the hole diameter is too large, when some of the holes are covered by the outer cylinder member 120, pressure fluctuations will be transmitted through the internal structure of the inner cylinder member 110, and a large amount of gas will be released from the part not covered by the outer cylinder member. may leak out, making it impossible to hold the outer cylinder member 120 in a separated state. If the hole diameter is below the upper limit, even if some of the holes are covered by the outer cylinder member, pressure fluctuations will be difficult to transmit to the internal structure of the inner cylinder member, and large amounts of pressure will be transmitted to the parts not covered by the outer cylinder member. Gas leakage is suppressed, and the outer cylinder member 120 can be held separated from the inner cylinder member 110 with uniform force.

The gas supplied from the inner cylinder member 110 to the gap S1 (the gap between the inner cylinder member 110 and the outer cylinder member 120) is preferably high-pressure air. When the gas is high pressure air, its pressure is preferably 0.05 MPa or higher, more preferably 0.2 MPa or higher, and preferably 0.7 MPa or lower, more preferably 0.5 MPa or lower. When the pressure of the gas supplied by the inner cylinder member 110 is within the above range, the outer cylinder member 120 can be maintained in a separated state.

In this embodiment, the inner cylinder member 110 has three regions 115L, 115M, and 115R (three or more area).

The three regions 115L, 115M, and 115R of the inner cylinder member 110 can be regions in which the pressure of the gas ejected from the gas supply hole can be adjusted. When the three regions 115L, 115M, and 115R are pressure-adjustable regions, the gas pressures in these regions may be the same or different. For example, among the three regions 115L, 115M, and 115R, if the gas pressure in the region 115M corresponding to the center in the width direction of the film is lower than the gas pressure in the end regions 115L and 115R, When the outer cylinder member 120 is placed at a position shifted from the inner cylinder member 110 due to force, the outer cylinder member 120 is moved so that the longitudinal center of the outer cylinder member is in the longitudinal direction of the inner cylinder member. It is possible to return it to a position that coincides with the center.

[Outer cylinder member]
The outer cylinder member 120 is a member whose inner diameter is larger than the outer diameter of the inner cylinder member 110. The length of the outer cylinder member 120 in the longitudinal direction may be shorter than the length of the inner cylinder member 110 in the longitudinal direction. The longitudinal direction of the outer cylinder member 120 is parallel to the direction corresponding to the width direction of the film (the direction indicated by the arrow A1).

Examples of the material for the outer cylinder member 120 include a resin thin film and a metal thin film. When the outer cylindrical member 120 is made of a metal thin film, there are methods such as plating a cylindrical support with metal that is the material of the outer cylindrical member and removing the support, and forming a metal thin film into a cylindrical shape. It can be manufactured by

The thickness of the outer cylinder member 120 is preferably 0.1 mm or more, more preferably 0.2 mm or more, and preferably 1 mm or less, more preferably 0.5 mm or less. By setting the thickness of the outer cylindrical member 120 to be equal to or greater than the above lower limit value, deformation due to contact with other members, films, etc. can be prevented. By setting the thickness of the outer cylindrical member 120 to be less than or equal to the above upper limit value, the outer cylinder member 120 can be easily rotated when held in a separated state.

[Transport roller]
The conveyance roller 100 of this embodiment can be used, for example, as a roller that conveys a long film. In such a case, the film transported by the transport roller 100 of the present embodiment is not particularly limited, but may include, for example, a resin film containing an alicyclic structure-containing polymer, a polyethylene terephthalate (PET) film, a polyethylene naphthalate film, etc. (PEN) film, acrylic film, polyethylene (PE) film, polypropylene (PP, OPP) film, polycarbonate (PC) film, polystyrene (PS) film, cellulose triacetate (TAC) film, polyvinyl chloride (PVC) film, polyimide Plastic films such as (PI) film, and super engineering plastics such as polyphenylene sulfide (PPS) film, polytetrafluoroethylene (PTFE) film, polyetheretherketone (PEEK) film, polyethersulfone (PES) film, and aramid film. Films include:

The conveyance roller 100 of this embodiment can perform stable conveyance even when a force is applied in a direction other than the film conveyance direction, so it can be used in production lines that perform continuous pressing, cutting, etc. It can be used for purposes such as transporting films.

[2. Action/Effect]
Next, the functions and effects of this embodiment will be explained.
The conveyance roller 100 of this embodiment includes a cylindrical inner tube member 110 and a cylindrical outer tube member 120 arranged to surround the inner tube member, and the outer tube member 120 has an inner diameter of It is a member larger than the outer diameter of the inner cylinder member 110, and the inner cylinder member 110 is a member having a hole that supplies gas to hold the outer cylinder member 120 with a gap S1 therebetween. Therefore, according to the present embodiment, the gas supplied from the inner cylinder member 110 can hold the outer cylinder member 120 in a spaced state (separated state), so that the inner cylinder member and the outer cylinder member Since the friction with the film can be reduced to only the frictional force with the gas, it can be excellent in following the film transport speed.

When a long film is transported by the transport roller 100 of this embodiment, the long film is arranged so that its width direction is parallel to the direction indicated by A1 (see FIGS. 1 and 2).
In this embodiment, the groove has a symmetrical shape with respect to the longitudinal center of the inner cylinder member 110. Therefore, as shown in FIGS. 1 and 2, when the longitudinal center 120P of the outer cylinder member 120 is arranged to coincide with the longitudinal center 110P of the inner cylinder member 110, each groove part 111A, 111B , 111C, and 111D that are covered by the outer cylinder member 120 held apart (gas flow path) are symmetrical with respect to the longitudinal center 110P of the inner cylinder member 110. In such a case, the forces caused by the gas flow in the channels (grooves) on the right side and the channels (grooves) on the left side of the through holes 112A, 112B, 112C, and 112D are balanced, so the film can be transported stably.

When transporting a film, the film may fluctuate in its width direction. In this embodiment, since a fixing part for regulating the position of the outer cylinder member 120 is not provided, when the film changes in the width direction, the center 120P of the outer cylinder member 120 follows the fluctuation and the inner cylinder member 110 may be shifted from the center 110P in the longitudinal direction of the film in the width direction of the film.

For example, as shown in FIG. 6, when the longitudinal center 120P of the outer cylinder member 120 is disposed at a position shifted to the right in the figure from the longitudinal center 110P of the inner cylinder member 110, the grooves 111A, 111B, 111C The parts to the right of the through holes 112A, 112B, 112C are covered by the outer cylinder member 120, but the parts (ends) of the grooves 111A, 111B, 111C to the left of the through holes 112A, 112B, 112C are exposed. do. Regarding the groove portion 111D, which is not shown in FIG. 6, the portion to the right of the through hole 112D is covered by the outer cylinder member 120, and a portion (end) of the portion to the left of the through hole 112D is exposed. In other words, in the arrangement state of the outer cylinder member 120 shown in FIG. On the other hand, it becomes asymmetrical. In such a case, as shown in FIGS. 6 and 7, forces 2R1, 2R2, 2R3, due to the gas flow in the right channel (groove) with respect to the through holes 112A, 112B, 112C, 112D, 2R4 and the forces 2L1, 2L2, 2L3, and 2L4 caused by the gas flow in the left channel (groove) are in an unbalanced state, and the outer cylinder member 120 has no force caused by the gas flow. A force 3 is applied to return to a balanced position (that is, a position where the longitudinal center 120P of the outer cylinder member 120 coincides with the longitudinal center 110P of the inner cylinder member 110). In FIG. 6, 120A indicates an outer cylinder member whose longitudinal center is arranged at a position where the longitudinal center 110P of the inner cylinder member 110 coincides with the longitudinal center 110P.

Further, as shown in FIG. 8, when the longitudinal center 120P of the outer cylinder member 120 is disposed at a position shifted to the left in the figure from the longitudinal center 110P of the inner cylinder member 110, the grooves 111A, 111B, and 111C penetrate. The portions to the left of the holes 112A, 112B, and 112C are covered by the outer cylinder member 120, but the portions (ends) of the grooves 111A, 111B, and 111C to the right of the through holes 112A, 112B, and 112C are exposed. . Regarding the groove portion 111D, which is not shown in FIG. 8, the portion to the left of the through hole 112D is covered by the outer cylinder member 120, and a portion (end) of the portion to the right of the through hole 112D is exposed. In other words, in the arrangement state of the outer cylinder member 120 shown in FIG. On the other hand, it becomes asymmetrical. In such a case, as shown in FIGS. 8 and 9, forces 2R1, 2R2, 2R3, due to gas flow in the right channel (groove) with respect to the through holes 112A, 112B, 112C, 112D, 2R4 and the forces 2L1, 2L2, 2L3, and 2L4 caused by the gas flow in the left channel (groove) are in an unbalanced state, and the outer cylinder member 120 has no force caused by the gas flow. A force 3 is applied to return to a balanced position (that is, a position where the longitudinal center 120P of the outer cylinder member 120 coincides with the longitudinal center 110P of the inner cylinder member 110). In FIG. 8, 120A indicates an outer cylinder member whose longitudinal center is arranged at a position where the longitudinal center 110P of the inner cylinder member 110 coincides with the longitudinal center 110P.

Therefore, according to the present embodiment, the film fluctuates in the width direction, and following the fluctuation, the center 120P of the outer cylinder member 120 moves from the longitudinal center 110P of the inner cylinder member 110 in the width direction of the film. Even if the outer cylinder member 120 is shifted, a force acts on the outer cylinder member 120 to return the longitudinal center 120P of the outer cylinder member 120 to the longitudinal center 110P of the inner cylinder member 110, and the outer cylinder member Since the film 120 returns to the above position, stable transport can be performed even when the film receives force in the width direction (force in a direction other than the transport direction).

Further, in this embodiment, the inner cylinder member 110 consists of three regions 115L, 115M, and 115R arranged in a direction corresponding to the width direction of the film, and in these three regions 115L, 115M, and 115R, the gas pressure can be adjusted. Therefore, for example, among the three regions 115L, 115M, and 115R, if the gas pressure in the region 115M corresponding to the center in the width direction of the film is lower than the gas pressure in the end regions 115L and 115R, the film width When the outer cylinder member 120 is placed at a position shifted from the inner cylinder member 110 due to a force in the direction, the outer cylinder member 120 is moved so that the longitudinal center of the outer cylinder member It is possible to return it to a position that coincides with the center in the direction.

Further, according to the present embodiment, since the inner cylinder member 110 has grooves having different lengths, when the degree of displacement of the outer cylinder member 120 with respect to the inner cylinder member 110 becomes large, the outer cylinder member 120 is , it is possible to increase the number of grooves that contribute to the action of returning the longitudinal center 120P of the outer cylinder member 120 to a position that coincides with the longitudinal center 110P of the inner cylinder member 110.

[Embodiment 2]
Hereinafter, a conveyance roller according to Embodiment 2 of the present invention will be described with reference to FIGS. 10 and 11. FIG. 10 is a front view schematically showing the conveyance roller according to this embodiment. FIG. 11 is a developed view schematically showing a state in which the inner cylinder member shown in FIG. 10 is cut along the line X3-X3 and expanded.

The conveying roller 200 of the present embodiment differs from the first embodiment in that the inner cylinder member 210 is constituted by one region, and that the groove portion is provided in an oblique direction with respect to the longitudinal direction of the inner cylinder member 210. differ. In the following, redundant explanation regarding the same configuration as in Embodiment 1 will be omitted.

As shown in FIG. 10, the conveyance roller 200 of this embodiment includes a cylindrical inner cylinder member 210 and a cylindrical outer cylinder member 220 arranged to surround the inner cylinder member 210. The outer cylinder member 220 is a member whose inner diameter is larger than the outer diameter of the inner cylinder member 210, and the inner cylinder member 210 has a hole for supplying gas to hold the outer cylinder member 220 with a gap. It is a member that has.

In the conveyance roller 200 of this embodiment, the inner cylindrical member 210 has grooves 211A, 211B, 211C, and 211D provided on the gap side surface, and through holes 212A, 212B that penetrate from the gap side surface to the back surface. 212C, 212D.

Also in this embodiment, the groove portions 211A, 211B, 211C, and 211D are partially or entirely covered by the outer cylinder member 220 held in a separated state, so that the portions covered by the outer cylinder member 220 are In this case, gas ejected from the outer surface of the inner cylinder member 210 flows. That is, the groove portions 211A, 211B, 211C, and 211D can be covered by the outer cylinder member 220 that is held in a separated state, thereby forming a flow path for the gas. The gas that has flowed through the flow path is discharged to the outside from through holes 212A, 212B, 212C, and 212D. Pipes (not shown) are connected to the through holes 212A, 212B, 212C, and 212D for discharging the gas flowing through the grooves 211A, 211B, 211C, and 211D to the outside.

As shown in FIG. 11, four through holes 212A, 212B, 212C, and 212D are provided in the longitudinal center of the inner cylinder member 110 at equal intervals (every 90 degrees) in the circumferential direction. Linear grooves 211A, 211B, 211C, and 211D extending obliquely to the longitudinal direction of the inner cylinder member 210 are provided on the right and left sides of the through holes 212A, 212B, 212C, and 212D in the drawing.

Grooves 211A, 211B, 211C, and 211D have symmetrical shapes with respect to through holes 212A, 212B, 212C, and 212D, respectively. In other words, the shapes of the grooves 211A, 211B, 211C, and 211D are symmetrical with respect to the longitudinal center 210P of the inner cylinder member 210 (the member provided with the grooves). By adopting such an aspect, when covered with the outer cylinder member 220 held in a separated state, the gas flow path is formed at a position symmetrical to the longitudinal center of the inner cylinder member 210. sell.

In this embodiment, the groove portions 211A, 211B, 211C, and 211D are provided at equal intervals (every 90°) in the circumferential direction of the inner cylinder member 210. By adopting such a mode, when covered by the outer cylinder member 220 held in a separated state, the gas flow path can be formed evenly in the circumferential direction of the inner cylinder member 210.

In this embodiment, the inner cylinder member 210 has two types of grooves with different lengths, as shown in FIG. 11 . Specifically, the lengths of the grooves 211A and 211C are longer than the lengths of the grooves 211B and 211D. Groove portions 211A and 211C have the same length, and groove portions 211B and 211D have the same length. As shown in FIG. 11, the long grooves 211A, 211C (also referred to as "long grooves") and the short grooves 211B, 211D (also referred to as "short grooves") are arranged in the circumferential direction of the inner cylinder member 210. are provided alternately.

By making the inner cylinder member 210 have grooves having different lengths, when the degree of displacement of the outer cylinder member 220 with respect to the inner cylinder member 210 becomes large, the outer cylinder member 220 can be moved along the longitudinal direction of the outer cylinder member 220. It is possible to increase the number of grooves that contribute to returning the inner cylinder member 210 to a position where the center 220P in the longitudinal direction coincides with the center 210P in the longitudinal direction.

In this embodiment, the grooves 211A, 211B, 211C, and 211D are provided obliquely with respect to the longitudinal direction of the inner cylinder member 210, so that in the portions of the grooves covered by the outer cylinder member 220, the inner cylinder member 211 Gas flows obliquely to the longitudinal direction. Due to such a gas flow, a force is exerted on the outer cylinder member 220 to return the outer cylinder member 220 to a position where the longitudinal center 220P of the outer cylinder member 220 coincides with the longitudinal center 210P of the inner cylinder member 210. A force that rotates the outer cylinder member 220 in the circumferential direction acts.

The angle θ1 of the long groove portion 211A with respect to the longitudinal direction of the inner cylinder member 210 and the angle θ2 of the short groove 211B with respect to the longitudinal direction of the inner cylinder member 210 are not particularly limited, but when θ1 and θ2 approach 90°, the outer cylinder member 220 When the force that rotates the outer cylinder member 220 in the circumferential direction becomes stronger and θ1 and θ2 approach 0°, the outer cylinder member 220 is moved so that the longitudinal center 220P of the outer cylinder member 220 becomes the longitudinal center 210P of the inner cylinder member 210. The action of the force that returns it to the position that matches becomes stronger. In this embodiment, θ1 is shown to be slightly larger than θ2, but θ1 may be smaller than θ2 or may be the same.

The preferred values of the width dimensions of the grooves 211A, 211B, 211C, and 211D and the maximum opening diameters of the through holes 212A, 212B, 212C, and 212D of this embodiment are the same as those of the first embodiment.

The inner cylinder member 210 of this embodiment may include a member made of a porous material. A part of the inner cylinder member 210 (for example, a part of the inner cylinder member 110 having the gas supply hole) may be made of a porous material, or the whole may be made of a porous material. may have been done. Examples of the porous material constituting the member made of porous material include the materials described in Embodiment 1.

The outer cylinder member 220 of this embodiment is a member whose inner diameter is larger than the outer diameter of the inner cylinder member 210. The configuration of the outer cylinder member 220 is the same as that in the first embodiment.

[Action/Effect]
Next, the functions and effects of this embodiment will be explained.
The conveyance roller 200 of this embodiment includes a cylindrical inner tube member 210 and a cylindrical outer tube member 220 arranged to surround the inner tube member, and the outer tube member 220 has an inner diameter of This member is larger than the outer diameter of the inner cylinder member 210, and the inner cylinder member 210 is a member having a hole for supplying gas to hold the outer cylinder member 220 with a gap therebetween. Therefore, according to this embodiment as well, the outer cylinder member 220 can be held with a gap (separated state) by the gas supplied from the inner cylinder member 210, so that the inner cylinder member and the outer cylinder member are separated. The friction can be reduced to only the frictional force with the gas, and it can be made to have excellent followability to the transport speed of the film.

When a long film is transported by the transport roller 200 of this embodiment, the long film is arranged so that its width direction is parallel to the direction indicated by A2 (see FIGS. 1 and 2).
In this embodiment, the grooves 212A, 212B, 212C, and 212D have a symmetrical shape with respect to the longitudinal center 210P of the inner cylinder member 210. Therefore, as shown in FIG. 10, when the longitudinal center 220P of the outer cylinder member 220 is arranged to coincide with the longitudinal center 210P of the inner cylinder member 210, each groove 211A, 211B, 211C, A portion (gas flow path) of 211D covered by outer cylinder member 220 held in a separated state is symmetrical with respect to center 210P of inner cylinder member 210 in the longitudinal direction. In such a case, the forces caused by the gas flow in the channels (grooves) on the right side and the channels (grooves) on the left side of the through holes 212A, 212B, 212C, and 212D are balanced, so the film can be transported stably.

When transporting a film, the film may fluctuate in its width direction. In this embodiment, since a fixing part for regulating the position of the outer cylinder member 220 is not provided, when the film changes in the width direction, the center 220P of the outer cylinder member 220 follows the change and the inner cylinder member 210 may be shifted from the center 210P in the longitudinal direction of the film in the width direction of the film.

When the longitudinal center 220P of the outer cylinder member 220 is disposed at a position shifted from the longitudinal center 210P of the inner cylinder member 210, it is covered by the outer cylinder member 220 of the grooves 211A, 211B, 211C, and 211D. The portion is asymmetrical with respect to the longitudinal center 210P (through hole) of the inner cylinder member 210. In such a case, with respect to the through holes 212A, 212B, 212C, and 212D, the force caused by the gas flow in the right channel (groove) in FIG. , the force due to the gas flow becomes unbalanced, and the outer cylinder member 220 is located at a position where the force due to the gas flow is balanced (i.e., the center 220P in the longitudinal direction of the outer cylinder member 220 is located inside). A force is applied to return the cylinder member 210 to a position corresponding to the longitudinal center 210P of the cylinder member 210. Furthermore, in this embodiment, since the grooves 211A, 211B, 211C, and 211D are provided obliquely with respect to the longitudinal direction of the inner cylinder member 210, a force that rotates the outer cylinder member 220 in the circumferential direction also acts.

As a result, according to the present embodiment, the film fluctuates in the width direction, and following the fluctuation, the center 220P of the outer cylinder member 220 changes from the longitudinal center 210P of the inner cylinder member 210 to the width of the film. Even if the outer cylinder member 220 is shifted in the direction, a force acts on the outer cylinder member 220 to return the longitudinal center 220P of the outer cylinder member 220 to the position where the longitudinal center 210P of the inner cylinder member 210 coincides with the longitudinal center 210P of the inner cylinder member 210. As a result, the outer cylindrical member 220 returns to the above position, so that stable transport can be performed even when the film receives force in the width direction (force in a direction other than the transport direction).

Further, according to the present embodiment, since the inner cylinder member 210 has grooves having different lengths, when the degree of displacement of the outer cylinder member 220 with respect to the inner cylinder member 210 becomes large, the outer cylinder member 220 can be removed. , it is possible to increase the number of grooves that contribute to the action of returning the longitudinal center 220P of the outer cylinder member 220 to a position that coincides with the longitudinal center 210P of the inner cylinder member 210.

Furthermore, according to the present embodiment, the grooves 211A, 211B, 211C, and 211D are provided obliquely with respect to the longitudinal direction of the inner cylinder member 210, thereby making it possible to rotate the outer cylinder member 220 in the circumferential direction. Therefore, an auxiliary driving force can be applied to the outer cylinder member 220.

[Embodiment 3]
Hereinafter, a conveyance roller according to Embodiment 3 of the present invention will be described with reference to FIG. 12. FIG. 12 is a front view schematically showing a conveyance roller according to the third embodiment.

The conveyance roller 300 of this embodiment differs from Embodiment 1 in that a groove and a through hole are not formed in the inner cylinder member. In the following, redundant explanation will be omitted for configurations similar to those in Embodiment 1.

As shown in FIG. 12, the conveyance roller 300 of this embodiment includes a cylindrical inner cylinder member 310 and a cylindrical outer cylinder member 320 arranged to surround the inner cylinder member 310. The outer cylinder member 320 is a member whose inner diameter is larger than the outer diameter of the inner cylinder member 310, and the inner cylinder member 310 has a hole for supplying gas to hold the outer cylinder member 320 with a gap S3. It is a member having.

The conveyance roller 300 of this embodiment is a roller that conveys a long film, and the inner cylinder member 310 is composed of three regions 315L, 315M, and 315R arranged in a direction corresponding to the width direction of the film. A configuration is provided in which the gas pressure can be adjusted in the three regions 315L, 315M, and 315R.

The inner cylinder member 310 of this embodiment may include a member made of a porous material. The inner cylindrical member 310 may be partially (for example, the portion of the inner cylindrical member 110 having the gas supply hole) made of a porous material, or may be entirely made of a porous material. may have been done. Examples of the porous material constituting the member made of porous material include the materials described in Embodiment 1.

The gas supplied from the inner cylinder member 310 is preferably high pressure air. When the gas is high-pressure air, the preferred value of the pressure is the same as that for high-pressure air explained in the first embodiment.

In this embodiment, the inner cylinder member 310 is composed of three regions 315L, 3115M, and 315R arranged in a direction corresponding to the width direction of the film (direction indicated by A3), as shown in FIG.

In this embodiment, the three regions 315L, 315M, and 315R of the inner cylinder member 310 are regions in which the pressure of the gas ejected from the gas supply hole can be adjusted, so the pressure of the gas can be adjusted in each region. It is possible. For example, among the three regions 315L, 315M, and 315R, if the gas pressure in the region 315M corresponding to the center in the width direction of the film is lower than the gas pressure in the end regions 315L and 315R, When the outer cylinder member 320 is placed at a position shifted from the inner cylinder member 310 due to force, the outer cylinder member 320 is moved so that the longitudinal center of the outer cylinder member is in the longitudinal direction of the inner cylinder member. It is possible to return it to a position that coincides with the center. The gas pressures in the three regions 315L, 315M, and 315R may be the same or different.

The outer cylinder member 320 is a member whose inner diameter is larger than the outer diameter of the inner cylinder member 310. The configuration of the outer cylinder member 320 is the same as that in the first embodiment.

[Action/Effect]
Next, the functions and effects of this embodiment will be explained.
The conveyance roller 300 of this embodiment includes a cylindrical inner tube member 310 and a cylindrical outer tube member 320 arranged to surround the inner tube member, and the outer tube member 320 has an inner diameter of This member is larger than the outer diameter of the inner cylinder member 310, and the inner cylinder member 310 is a member having a hole for supplying gas to hold the outer cylinder member 320 with a gap S3 therebetween. Therefore, also in this embodiment, the gas supplied from the inner cylinder member 310 can hold the outer cylinder member 320 with a gap (separated state), so that the inner cylinder member and the outer cylinder member The friction can be reduced to only the frictional force with the gas, and it can be made to have excellent followability to the transport speed of the film.

When a long film is transported by the transport roller 300 of this embodiment, the long film is arranged so that its width direction is parallel to the direction indicated by A3 (see FIG. 12).

When transporting a film, the film may fluctuate in its width direction. In this embodiment, since a fixing part for regulating the position of the outer cylinder member 320 is not provided, when the film changes in the width direction, the center 320P of the outer cylinder member 320 follows the change and the inner cylinder member 310 may be shifted from the center 310P in the longitudinal direction of the film in the width direction of the film.

In this embodiment, the inner cylinder member 310 consists of three regions 315L, 315M, and 315R arranged in a direction corresponding to the width direction of the film and in which the gas pressure can be adjusted. It is possible to adjust the pressure of the gas. For example, among the three regions 315L, 315M, and 315R, if the gas pressure in the region 315M corresponding to the center in the width direction of the film is lower than the gas pressure in the end regions 315L and 315R, When the outer cylinder member 320 is disposed at a position shifted from the inner cylinder member 310 due to force, the longitudinal center 320P of the outer cylinder member 320 may be displaced from the inner cylinder member 310. It is possible to return it to a position that coincides with the center 310P in the longitudinal direction. As a result, according to this embodiment, stable transport can be performed even when the film receives force in the width direction (force in a direction other than the transport direction).

[Other embodiments]
(1) In the above embodiment, only the inner cylinder member has a groove and a through hole, but the present invention is not limited to this. The outer cylinder member may have a groove and a through hole, or both the inner cylinder member and the outer cylinder member may have a groove and a through hole.
(2) Although the embodiment described above shows an embodiment having a linear groove, the shape of the groove is not limited to this. The shape of the groove portion may be a curved shape such as a spiral shape. Alternatively, a mode may be adopted in which straight groove portions and curved groove portions are alternately provided.
(3) In the above embodiment, an example was shown in which all the grooves have a symmetrical shape with respect to the longitudinal center of the inner cylinder member. It may also include a shape asymmetrical with respect to the center.
(4) In the above embodiment, one through hole is provided in one groove, but a plurality of through holes may be provided in one groove.
(5) In the above embodiment, an example was shown in which a plurality of grooves were provided, but the number of grooves may be one.
(6) In Embodiments 1 and 3 above, the inner cylinder member consists of three regions arranged in a direction corresponding to the width direction of the film, and in Embodiment 2, the inner cylinder member consists of one region. , but not limited to. The inner cylindrical member may include four or more regions.

1... Direction in which the introduced gas flows 2L1, 2L2, 2L3, 2L4... Force caused by the flow of gas 2R1, 2R2, 2R3, 2R4... Force caused by the flow of gas 3... Direction in which the outer cylinder member moves 4... Exhaust 100, 200, 300... Conveyance roller 110, 210, 310... Inner cylindrical member 110A, 110B... End of inner cylindrical member 110P, 210P, 310P... Center in the longitudinal direction of inner cylindrical member 111A, 111B , 111C, 111D, 211A, 211B, 211C, 211D...Groove portion 112A, 112B, 112C, 112D, 212A, 212B, 212C, 212D...Through hole 115L, 115M, 115R, 315L, 315M, 315R...Region 120, 220, 320 ...Outer cylinder member 120P, 220P, 320P...Center in the longitudinal direction of the outer cylinder member 120A...Outer cylinder member arranged at a position where the center in the longitudinal direction coincides with the center 110P in the longitudinal direction of the inner cylinder member 110

Claims (6)

a cylindrical inner tube member;
A conveying roller comprising: a cylindrical outer cylinder member disposed to surround the inner cylinder member,
The outer cylindrical member is a member whose inner diameter is larger than the outer diameter of the inner cylindrical member,
The inner cylindrical member is a member having a hole that supplies gas to hold the outer cylindrical member with a gap,
The inner cylindrical member, the outer cylindrical member, or both have a groove provided on the surface on the gap side, and a through hole provided in the groove and penetrating from the surface on the gap side to the back side. Conveyance roller. The conveyance roller is a roller that conveys a long film,
The inner cylinder member consists of three or more regions arranged in a direction corresponding to the width direction of the film,
The conveyance roller according to claim 1, wherein the pressure of the gas can be adjusted in the three or more regions. The conveying roller according to claim 2, wherein, among the three or more regions of the inner cylinder member, a region corresponding to the center in the width direction of the film is a region where the pressure of the gas is lower than other regions. The conveyance roller according to any one of claims 1 to 3, wherein the groove portion is provided in an oblique direction with respect to the longitudinal direction of the inner cylinder member . The conveyance roller according to any one of claims 1 to 4, wherein the groove has a symmetrical shape with respect to the longitudinal center of the member in which the groove is provided. The inner cylinder member includes a member made of a porous material,
The conveyance roller according to any one of claims 1 to 5, wherein the member made of the porous material has an average pore diameter of 10 μm or less.

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