JPH06263299A - Roller and roller device - Google Patents

Abstract

PURPOSE:To feed band-shaped materials such as synthetic resin films and aluminum foils stably without doing damage. CONSTITUTION:Protruding parts 2 are formed at prescribed intervals along the circumferential direction of a core part whose rigidity is high such as metal and synthetic resin. The width of all or a part of the protruding parts 2 is changed so as to be formed into a linear or curved shape over the whole length or a part along the axial direction. The surface part 3 of an elastic element such as synthetic rubber are formed, coming into contact with the protruding parts 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller and a roller device for feeding a belt-shaped body such as a long paper, a synthetic resin film or a metal foil. Continuous feeding of long strips of paper, synthetic resin film, metal foil, etc. to cut into a predetermined width,
Alternatively, a device for winding a belt to a predetermined diameter employs a configuration in which a belt is used to feed the belt-shaped body. Further, for example, in a surface roughening treatment device or a chemical conversion treatment device for an aluminum foil for an aluminum electrolytic capacitor, a structure in which a long aluminum foil is fed by a roller device composed of a single roller or a plurality of rollers is used. Has been adopted. In a roller device for feeding such a band-shaped body, which comprises a single roller or a plurality of rollers, it is necessary to be able to stably feed the band-shaped body in accordance with the characteristics of the band-shaped body.

[0002]

2. Description of the Related Art A roller for feeding a strip is generally of a cylindrical shape made of metal or synthetic resin. When the belt-shaped body is fed by a cylindrical roller having a constant winding length around the belt-shaped body along such an axial direction, a large tension is generally applied to the belt-shaped body so as to prevent meandering and wrinkling. Is. In addition, an elastic body such as rubber or sponge may be attached to the outer peripheral surface of the cylindrical roller so as to be in elastic contact with the belt-shaped body so that excessive stress is not applied to the belt-shaped body. Are known. There is also known a structure in which a linear unevenness extending in the axial direction is formed on the outer peripheral surface of the roller to reduce the contact area with the belt-shaped body and reduce the chance of wrinkling.

Further, a plurality of convex portions are formed on the outer peripheral portion of the roller, and the convex portions are arranged at predetermined intervals along the circumferential direction and are symmetrical with respect to the central portion in the axial direction. Alternatively, a roller device that prevents the meandering and prevents the generation of wrinkles without giving a large tension to the belt-like body to be fed by the configuration of the combination thereof has been previously proposed (Japanese Patent Application No. 62-201826). No.). Further, a roller device in which a convex portion having an arc-shaped cross section is formed so that the belt-shaped member can be fed without bending with a small curvature has been previously proposed (see Japanese Patent Application No. 1-8902). ).

[0004]

When the strip fed by the roller device is, for example, an aluminum foil for an aluminum electrolytic capacitor, the aluminum foil having large crystal grains and large brittleness is used. There is. Further, the aluminum foil subjected to the surface roughening treatment may have a very small characteristic as a metal. When such an aluminum foil is bent with a small curvature, it causes breakage and plastic deformation occurs, which causes deterioration of product characteristics. Further, since the thickness of the aluminum foil tends to be thinned, the tensile strength becomes smaller and the plastic deformation easily occurs as the thickness of the aluminum foil becomes thinner.

In order to prevent the meandering and wrinkling of the aluminum foil and to feed the aluminum foil, the above-mentioned previously proposed roller device having a plurality of convex portions is provided with the aluminum foil to be fed. On the other hand, the action of gradually extending in the longitudinal direction from the center of the aluminum foil in the width direction toward both ends becomes greater. When the stretched state is such that the aluminum foil is plastically deformed, slackness occurs at both end portions with respect to the center portion in the width direction of the aluminum foil, which becomes a problem in the next processing step. For example, if you wind it up to a large outer diameter, both ends will become loose,
Also, when cut into narrow widths, the cut lengths will differ depending on the axial position.
There was a problem that winding was difficult.

In order to improve such a defect, the radius of the central portion of the roller in the axial direction is increased so that the winding length around the aluminum foil is reduced from the center of the aluminum foil in the width direction toward both ends. A crown-shaped roller configured as described above is known. Since the center portion of the aluminum foil in the width direction is stretched by this roller, the stretching action can be averaged for the aluminum foil whose both end portions are stretched as compared with the center in the width direction. However, since this crown-shaped roller has a shape in which the outer diameter increases in a curved shape from both axial end portions toward the central portion, it is necessary to manufacture it by a high-precision machine tool, and therefore the outer peripheral surface is It has the disadvantage of being more expensive than a cylindrical roller. SUMMARY OF THE INVENTION It is an object of the present invention to provide a roller and a roller device that can be stably fed corresponding to the characteristics of various band-shaped bodies and that can be easily manufactured.

[0007]

The roller and roller device of the present invention will be described with reference to FIG. 1. The rollers and the roller device are arranged at predetermined intervals along the circumferential direction, and all or part of them are arranged along the axial direction. A highly rigid core body portion 1 having a convex portion 2 whose shape is changed over the entire length in the axial direction or a part thereof.
And a surface layer portion 3 provided outside the core body portion 1 at least in contact with the convex portion 2 and having an outer peripheral surface made of a cylindrical elastic body.

Further, the convex portions 2 are arranged at a predetermined interval along the circumferential direction of the core body 1 having a high rigidity, and all or a part of the convex portions 2 are axially full length or a part thereof. A roller having a shape in which the width changes over the surface and provided with a surface layer portion 3 which is in contact with the convex portion 2 and whose outer peripheral surface is made of a cylindrical elastic body, is provided along the number of the convex portions 2 of the roller and the axial direction. The roller device is configured by combining a plurality of rollers including rollers having at least one of different shapes.

[0009]

The cylindrical surface layer portion 3 provided outside the core body portion 1 is
Since it is made of an elastic material such as rubber, it is elastically deformed by coming into contact with the belt-shaped material to be fed. At that time, the amount of deformation is different between the portion directly above the convex portion 2 and the portion directly above the valley between the convex portions 2, and the portion that comes into contact with the strip corresponds to the shape of the convex portion 2. The outer peripheral surface has a polygonal shape, and even in the axial direction, the convex portion 2 is elastically deformed into the shape along the axial direction. The belt-like body is in elastic contact with the convex portion 2
Delivered with characteristics corresponding to the shape of. For example, the convex portion 2
When the shape is large in width in the central part in the axial direction and gradually decreases toward both ends, the winding length in the central part in the axial direction is caused by elastic deformation of the surface layer part 3 in contact with the strip. Is long, and the strip-shaped body is fed so that the winding length becomes gradually shorter toward both ends, and an extension action is given to the central portion in the width direction of the strip-shaped body.

Further, a roller device composed of a plurality of rollers including rollers in which at least one of the number of the convex portions 2 provided on the core portion 1 and the shape along the axial direction of the convex portions 2 is different. , The winding length of the belt-shaped body on each roller changes or becomes the same along the axial direction, avoiding the occurrence of plastic deformation, etc. in the feeding process of various belt-shaped bodies, or causing the belt-shaped body to undergo plastic deformation. You can make corrections to your body. Further, since the contact timing between the surface layer portion 3 on the convex portion 2 and the belt-shaped body can be different for each roller, it is possible to prevent the occurrence of vibration.

[0011]

FIG. 1 is a schematic perspective view of an embodiment of the present invention,
Reference numeral 1 is a core portion, 2 is a convex portion, 3 is a surface layer portion, and 4 is a shaft.
The core portion 1 is made of a material having high rigidity such as various metals, various synthetic resins, and fiber reinforced synthetic resins. Further, the convex portions 2 are arranged at predetermined intervals along the circumferential direction of the core portion 1, and the total number or a part of the convex portions 2 is the entire length along the axial direction or the width thereof. Is a shape that changes. This convex portion 2
Is generally formed integrally with the core body 1,
The convex portion 2 may be fixed to the cylindrical core portion 1 by a known means.

The surface layer 3 has a cylindrical outer peripheral surface and is provided outside the core body 1 so as to contact at least the convex portion 2, and is made of an elastic material such as natural rubber or various synthetic resin rubbers. It consists of. For example, in the core body portion 1 having the convex portion 2,
An unvulcanized rubber is wound into a roller shape, directly vulcanized by using pressure and heated steam, and polished so that the outer peripheral surface becomes a cylindrical shape. Can be configured.

2A and 2B are explanatory views of the deformation of the surface layer portion of the embodiment of the present invention. FIG. 2A is a cross-sectional view of a main portion, showing a convex portion 2 provided on the core portion 1 and the convex portion 2 thereof. The case where the surface layer portion 2 of the elastic body is provided in contact with the valley portion 5 having an arcuate cross section between
The width of the convex portion 2 is W, and the thickness of the surface layer portion 3 on the convex portion 2 is d.
1. If the thickness of the surface layer portion 3 on the valley portion 5 is d2, due to the pressure when the strip-shaped body comes into contact with the surface layer portion 3 and is fed,
The amount of deformation shown in (b) occurs in the surface layer portion 3.

In this case, the width W of the surface layer portion 3 on the convex portion 2
Let δ1 be the amount of deformation and δ2 be the amount of deformation on the valley 5, then δ
1: δ2≈d1: d2. That is, the convex portion 2 and the valley portion 5
The cross-sectional shape of the surface layer 3 is reversed, and the deformed shape of the surface layer portion 3 is deformed, and the outer peripheral surface of the surface layer portion 3 is deformed into a shape along the axial direction of the convex portion 2. Therefore, as shown in (c) of FIG. 2, the surface 6 of the elastic surface layer 3 is formed by the convex portion 2 due to the pressure when the strip-shaped body contacts the surface layer 3 and is fed.
Since the amount of deformation on the top is small and the amount of deformation on the valley 5 is large, as shown by the dotted line 7, each side and ridge line are deformed into a polygonal shape with roundness.

FIG. 3 is an explanatory view of a main part development pattern and a winding length of one embodiment of the present invention. The convex portion 2 is shown by hatching, and the convex portion 2 is in the axial direction of the roller. The width W1 at the central portion 8 is the width W at the left end 9 and the right end 10.
2, the ridge line of the convex portion 2 is a straight line parallel to the axial direction, and the other ridge line is a curved line. In the case of such a convex portion 2 whose width changes over the entire length in the axial direction, the outer peripheral surface of the surface layer portion 3 is deformed into a polygonal shape due to the pressure caused by the belt-shaped members coming into contact with each other and being fed. 3, the central portion is long and the left end 9 and the right end 10 are short as shown in the lower side of FIG. 3, and the winding length thereof changes along the axial direction corresponding to the change of the width of the convex portion 2. . The winding length in this embodiment is similar to that of a crown-shaped roller.

Therefore, the belt-shaped body is fed to the surface layer portion 3 of the elastic body in an elastic contact state, and the belt-shaped body is not flawed.
Further, since the belt-shaped body is not bent with a small curvature due to the deformation of the surface layer portion 3 extending over the convex portion 2 and the valley portion 5, it is possible to stably feed even a thin and highly brittle belt-shaped body. . Also, it is possible to feed a band-shaped body with the same characteristics as a crown-shaped roller, but since the outer peripheral surface is cylindrical,
Easy to make.

FIG. 4 is an explanatory view of a development pattern of a convex portion according to another embodiment of the present invention, showing a case where the convex portion 11 has a surface shape similar to a rhombus, and is at a central portion 16 in the axial direction. The width W1 at the left end 14 and the right end 15 is made wider than the width W2 at the left end 14 and the change in the width along the axial direction is linear.

Further, 11-1 on the right side shows a cross section at the central portion 16, and 11-2 shows a cross section at the left end 14 or the right end 15. Further, the convex portion 11 and the valley portion 12 show the case where the sectional shape is rectangular, and the surface layer portion 13 of the elastic body is provided on the convex portion 11 and the valley portion 12. This surface layer 1
In No. 3, the winding length at the central portion 16 is made longer than the winding length at the left end 14 and the right end 15 because the deformation according to the shape of the convex portion 11 is caused by the pressure of the belt-shaped body to be fed. be able to.

Further, like the lower convex portion 11a in FIG. 4, one of its ridge lines is a straight line parallel to the axial direction, and the other ridge line extends from the central portion 16 toward the left end 14 and the right end 15.
The case where a straight line inclined in the direction opposite to the rotation direction shown by the arrow is shown, and since the surface layer portion 13 is deformed according to the inclined ridge line, a force to spread in the width direction is given to the band-shaped body, and the left end 14 or the right end is given. When the band is biased to 15,
A force for returning to the central portion 16 can be applied. That is, it is possible to prevent the meandering and to feed the belt-shaped body without causing wrinkles.

FIG. 5 is an explanatory view of a development pattern of a convex portion according to still another embodiment of the present invention, showing a case where the convex portions 21a and 21b are combined, and a cross section at the right end 25 is shown on the right side. The convex portions 21a and 21b and the valley portion 2 in this embodiment
2 has a rectangular cross-sectional shape similar to the convex portion 11 and the valley portion 12 in FIG. 4, and the surface layer portion 23 of the elastic body has the convex portion 21a,
The case where it is provided on 21b and the valley portion 22 is shown. Further, 24 is the left end, 25 is the right end, and 26 is the central part.

In the roller of this embodiment, the convex portion 21a is parallel to the axis and has the same width along the axial direction, but the convex portion 21b is wider from the left end 24 to the right end 25. It is a shape. That is, not the total number of convex parts,
A case is shown in which a part of the shape has a width that changes over the entire length in the axial direction from the left end 24 to the right end 25. According to this embodiment, the winding length on the right end 25 side is longer than that on the left end 24. Since the belt-like body fed by such a roller is extended on the right end side in the width direction,
When feeding a strip that has already been stretched on the left side,
The extension along the width direction of the strip is corrected so as to be uniform.

In addition, a convex portion 31 having various shapes is provided on the lower side of FIG.
a, 31b, 31c, 31d, and the convex portion 31a is
Both ridges are arcuate, the width at the central portion 26 is widest, and the width becomes narrower toward the left end 24 and the right end 25 in a curved shape. Further, the convex portion 31b is a case where both ridge lines are arcs having different curvatures and the centers thereof are on the same side, and a case similar to a mountain shape is shown.

The convex portion 31c has a right end 25 rather than a left end 24.
The case where the ridge lines of arcs having different curvatures are combined so that the width of is wide is shown. The convex portion 31d has a shape of a ridge line that is a combination of straight lines and curved lines, and shows a case where it is mountain-shaped as a whole. Further, from the central portion 26 toward the left end 24, the convex portion 21
Alternatively, the convex portion 21b may be configured as the convex portion 21b from the central portion 26 toward the right end 25. That is, instead of the entire length along the axial direction, the width may be changed over a part thereof. Further, the above-mentioned convex portions may be provided in combination with one roller.

FIG. 6 is a cross-sectional view of a main part of still another embodiment of the present invention, in which 41 is a core body having high rigidity, 42 is a convex portion,
43 is a surface layer portion made of an elastic body, 44 is a void, and 45 is a valley portion. In this embodiment, the surface layer portion 4 is in contact with the convex portion 42.
3 is provided, and a void 44 is formed between the surface layer portion 43 and the valley portion 45. The outer peripheral surface of the surface layer portion 43 is formed in a cylindrical shape.

As compared with the surface layer portion 43 on the convex portion 42, the surface layer portion 43 on the valley portion 45 is formed with the voids 44, so that the deformation amount due to the pressure when feeding the band-shaped body becomes large. . Therefore, the influence of the shape of the convex portion 42 becomes more significant when the strip is fed, as compared with the case where the void 44 is not formed. The convex portion 42 can use various surface shapes in the above-described embodiments. The convex portion 4
Various shapes can be selected for the cross-sectional shapes of 2 and the valley portion 45 in consideration of the deformation amount of the surface layer portion 43.

FIG. 7 is an explanatory view of the roller device. Reference numeral 70 denotes a belt-shaped member, 71 to 75 denote rollers, and the rollers 71 to 7 respectively.
5 is rotated in the direction of the arrow. In this case, a roller driven by a motor or the like and a guide roller for guiding the belt-shaped body 70 are generally combined. Further, the rollers 71 to 75 may have the same structure based on any one of the above-described respective embodiments, but as described above, the winding length along the width direction of the belt-shaped body 70 to be fed. Therefore, the number of convex portions or the shape of the convex portions is different for at least one roller.

When the shape of the convex portion 2 is different for each roller, the extending action of the rollers 71 to 75 on the belt-shaped body can be averaged. Further, in the case of feeding the band-shaped body which has already undergone the stretching action and has been plastically deformed, a roller having the convex portion 2 having a shape for correcting it is combined. Further, when the number of the convex portions 2 is different among the rollers, it is possible to prevent the convex portions from facing each other through the surface layer portion 3 at the same timing, so that the occurrence of vibration is prevented. can do.

[0028]

As described above, according to the present invention, all or a part of the convex portions 2 arranged at a predetermined interval in the circumferential direction on the core portion 1 having a high rigidity can be set in the axial direction. The shape over the entire length or the shape over a part thereof is changed in width along the axial direction, the surface layer portion 3 made of an elastic body is provided on the outer side thereof, and the outer peripheral surface thereof has a cylindrical shape,
The belt-shaped body can be fed in an elastic contact state, and the surface layer portion 3 is deformed corresponding to the shape of the convex portion 2,
Since it has a rounded polygonal shape, it is possible to make the winding length corresponding to the shape of the convex portion 2 without giving a flaw or bending with a small curvature to the band-shaped body. Therefore, it is possible to easily form a structure in which wrinkles and meanders are prevented from being fed, and it is also possible to form a structure in which a band-shaped body that has undergone various plastic deformations is corrected and fed.

Further, by constructing the roller device including rollers having at least one of the number of the convex portions 2 and the shape along the axial direction different, it is possible to obtain the feeding characteristic suitable for the characteristic of the belt-shaped body. Thus, the feeding can be performed while, for example, balancing the stretching action on the strip or correcting the strip already subjected to the stretching action. Further, by selecting the number of the convex portions 2, it is possible to feed the belt-shaped body without causing vibration. Therefore, there is an advantage that it is possible to stably feed even an extremely thin and highly brittle strip.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a modification of the surface layer portion according to the embodiment of this invention.

FIG. 3 is an explanatory diagram of a main part development pattern and a winding length according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram of a developed pattern of a convex portion according to another embodiment of the present invention.

FIG. 5 is an explanatory view of a developed pattern of a convex portion according to still another embodiment of the present invention.

FIG. 6 is a cross-sectional view of an essential part of still another embodiment of the present invention.

FIG. 7 is an explanatory diagram of a roller device.

[Explanation of symbols]

 1 core part 2 convex part 3 surface layer part 4 axis

Claims (2)

[Claims] 1. A roller for feeding a band-shaped body, wherein all or a part of the shape of the roller is arranged at a predetermined interval along the circumferential direction and has the entire length in the axial direction. A highly rigid core body portion (1) having a convex portion (2) whose width is changed over a part thereof, and the core body portion (1) at least in contact with the convex portion (2).
And a surface layer portion (3) provided on the outer side of the outer peripheral surface and made of an elastic body having a cylindrical outer peripheral surface. 2. A roller device comprising a plurality of rollers for feeding a belt-shaped body, wherein convex portions (2) arranged at predetermined intervals along a circumferential direction of a core body (1) having high rigidity. And a shape in which the width of all or a part of the convex portions (2) is changed over the entire axial length or a part thereof, and the core body is in contact with the convex portions (2). A roller having a surface layer portion (3) having an outer peripheral surface made of a cylindrical elastic body is provided outside the portion (1), and the number of the convex portions (2) of the roller or the shape along the axial direction is provided. A roller device comprising a plurality of rollers including at least one of different rollers.