JPH0286538A - Roller device - Google Patents

Abstract

PURPOSE:To resolve the generation of wrinkling, snaking, breakdown and discontinued running by forming, on a connecting part in the intermediate between cylindrical parts on the outer circumferential part of a roller, a vertex part lower than a circle with the diameter of the cylindrical part and higher than a straight line connecting between the end parts of the cylindrical parts. CONSTITUTION:A band body is fed in contact to a vertex part 4 between cylindrical parts 2, 2 formed at determined intervals in the circumferential direction. The generation of wrinkling is suppressed by the cylindrical parts 2, and the tension variation given to the band body is reduced by the vertex part 4 to suppress the generation of vibration and breakdown. A rapid bending to the band body can be prevented by forming the part of the ridgeline 5 between the cylindrical part 2 and a connecting part 3 in a curved surface, so that the band body having a low mechanical strength can be also fed without causing a breakdown.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention uses a single roller or a plurality of rollers to continuously feed a metal foil such as aluminum, 2 a synthetic resin film, a strip of paper, etc. The present invention relates to a roller device having a roller device.

Metal foil such as aluminum 2 Synthetic resin film.

In a device that continuously feeds a strip of paper or the like and cuts it into predetermined lengths, or in a device that winds it to a predetermined diameter, the strip is fed by a roller device having a single or multiple rollers. The transfer will take place. Also, in aluminum foil roughening treatment equipment, chemical conversion treatment equipment, etc. for aluminum electrolytic capacitors, the aluminum foil as a strip is fed by a roller device having a single or plural rollers. When feeding such a thin strip, it is desired to prevent the strip from being broken or wrinkled, meandering or vibrating.

[Conventional technology]

Conventional rollers for feeding the above-mentioned strips are as follows:
Cylindrical shapes made of metal or synthetic resin were common.

When such a roller is used, a large tension is applied to the belt-shaped body while feeding the belt-shaped body to prevent wrinkles and meandering from occurring in the belt-shaped body.

Also, a configuration is known in which an elastic body such as rubber or sponge is adhered to the outer peripheral surface of the roller to prevent excessive stress from being applied to the strip. Also known is a structure in which linear unevenness extending in the axial direction is formed on the outer circumferential surface of the roller to reduce the contact area with the strip, thereby reducing the chance of wrinkles.

[Problem to be solved by the invention]

Metal foil such as aluminum 9 Synthetic resin film.

When feeding a strip of paper or the like, wrinkles, meandering, breakage, and discontinuous running of the strip are major problems.

To solve this problem, we developed a structure in which a plurality of convex portions are formed on the outer periphery of the roller at appropriate intervals in the circumferential direction, and a structure in which the convex portions are formed symmetrically with respect to the center of the roller. In addition, means for adjusting the tension and running speed applied to the belt-shaped body and means for increasing the mechanical strength have also been proposed.

However, when feeding a thin strip, the mechanical strength of the strip decreases, so there are limits to the above-mentioned configuration and means. It becomes impossible to solve the problem that occurs.

An object of the present invention is to solve the above-mentioned problems even when the strength and thickness of the band-shaped body are small.

[Means to solve the problem]

The roller device of the present invention includes true cylindrical portions 2 having a predetermined width and at predetermined intervals along the circumferential direction on the outer peripheral portion 1 of the roller, and polygonal or curved connecting portions between the true cylindrical portions 2. 3, and at the connecting part 3 in the middle between the true cylindrical parts 2, there is an apex part 4 lower than the circle of the diameter of the true cylindrical parts 2 and higher than the straight line connecting the ends of the true cylindrical parts 2. was formed.

Further, the true cylindrical portion 2 and the apex portion 4 are formed in the shape of an inclined straight line, a curved line, or a combination thereof, which is symmetrical with respect to the center in the axial direction.

Further, the shape and the spacing along the circumferential direction are selected so that a portion of each of the true cylindrical portion 2 and the apex portion 4 is always in contact with the fed belt-shaped body.

[For production]

The belt-shaped body is fed in contact with true cylindrical portions 2 formed at predetermined intervals in the circumferential direction and vertex portions 4 between the true cylindrical portions 2, and the true cylindrical portion 2 prevents the occurrence of wrinkles. This suppresses the change in tension applied to the strip by the apex portion 4, thereby suppressing the occurrence of vibration and breakage. Also, by making the ridge vA5 between the true cylindrical portion 2 and the connecting portion 3 into a curved surface, the band-shaped body is prevented from being bent sharply.
Even a belt-shaped body with low mechanical strength can be fed without causing breakage.

In addition, by making the true cylindrical portion 2 and the apex portion 4 into symmetrical inclined straight lines, curved lines, or a combination thereof with respect to the center in the axial direction, the central portion of the belt-shaped body is not easily supplied. A component force is applied only in the feeding direction, and in the left and right parts from the center part, a component force is applied not only in the feeding direction but also in the direction orthogonal to it, giving a force in the width direction to the strip. Therefore, it is possible to prevent the occurrence of wrinkles and meandering.

In addition, by forming a part of the true cylindrical portion 2 and the apex portion 4 into such a shape that they are always in contact with the fed strip, changes in tension on the fed strip can be further reduced, and vibration and breakage can be reduced. Occurrence can be prevented.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic perspective view of an embodiment of the present invention, in which a circular curve (or straight line) extending in the axial direction and symmetrical with respect to the center of the outer circumference 1 is formed on the outer circumference 1 of the roller. A true cylindrical portion 2 of a predetermined width and a continuous curved (or polygonal) connecting portion 3 are formed at predetermined intervals in the circumferential direction. It is formed to be lower than the diameter of the circle and higher than the straight line connecting the true cylindrical parts 2.

Further, 5 is a ridgeline at the boundary between the true cylindrical portion 2 and the connecting portion 3, and 6 is a rotation axis.

The true cylindrical portion 2 may have a linear shape extending in the axial direction, but in order to enhance the effect of preventing the occurrence of wrinkles in the band-shaped body, the true cylindrical portion 2 may have a symmetrical shape with respect to the center of the outer peripheral portion 1 in the axial direction. It can be a quadratic curve such as a circular arc, a parabola, or a hyperbola. Alternatively, it may be an inclined straight line that is symmetrical with respect to the center of the outer circumferential portion 1 in the axial direction. Alternatively, only the central portion may be curved, and the other portions may be inclined straight lines. That is, the shape may be a combination of a curved line and a straight line.

FIG. 2 is a cross-sectional view of one embodiment of the present invention. When the diameter of the true cylindrical part 2 passing through the axial center of the roller is D, and the connecting part 3 between the true cylindrical parts 2 is an arcuate surface, its radius R Let the relationship be R>D/2. The apex portion 4 of the connecting portion 3 at the intermediate position between the true cylindrical portions 2 is lower than the circle 7 of the diameter of the true cylindrical portion 2;
Straight line 8 connecting the ends of (straight line connecting adjacent ridge lines 5)
It becomes higher by a than that.

Furthermore, even when the belt-shaped body is fed in contact with the arc length of the connecting part 3 between the true cylindrical parts 2, at least a part of the apex part 4 or a part of the true cylindrical part 2 is always in contact with the belt-shaped body. As such, the curvature of the curve of the true cylindrical portion 2 and the height a of the apex portion 4 are selected in accordance with the width of the strip, the diameter of the roller, and the like.

In addition, the ridgeline 5 at the boundary between the true cylindrical portion 2 and the curved or polygonal connecting portion 3 is a curved surface, and the intervals between the true cylindrical portions 2 along the circumferential direction are equally spaced. Alternatively, they can be irregularly spaced. Further, although the width is shown to be narrower than the width of the connecting portion 3, it is also possible to make the width approximately equal, and the width can be selected depending on the properties of the belt-shaped body to be fed.

In addition, in accordance with the winding angle of the fed strip around the roller, the true cylindrical portion 2 and the apex portion 4 are arranged in the circumferential direction so that at least a part of them always comes into contact with the strip. The interval along the line, the angle of inclination with respect to the axial direction in the case of an inclined straight line, the curvature in the case of a curved line, etc. are set.

FIG. 3 is a developed explanatory diagram of one embodiment of the present invention. True cylindrical part 2
shows a case where the curve has a symmetrical curve (arc) with respect to the center line C of the outer circumferential portion l. Therefore, the apex portion 4 of the connecting portion 3 between the true cylindrical portions 2 also has a curve corresponding to the curve of the true cylindrical portion 2 (
arc).

When a strip is fed by a roller driven in the direction of arrow F, a force fo parallel to the center line C is applied to the strip at point B corresponding to the center line C of the outer circumference 1 of the roller. It will be done. For example, at point A, which is far from the center line C, a force f is parallel to the center line C.

At the same time, a component force f1 corresponding to the shape of the true cylindrical portion 2 is generated. Since this component force f becomes a force that pulls the strip in the width direction, wrinkles do not occur in the fed strip. In addition, since the true cylindrical portion 2 has a symmetrical curve with respect to the center line C, when the strip is deflected to either the left or right, the resultant force of the component forces f acting on the left and right sides of the strip is different. As a result, the strip is returned to the center, so meandering does not occur.

Further, if the central angle between the ridge lines 5 in FIG. 2 is θ, then when the roller rotates at a constant angular velocity ω and is feeding the strip, the speed ■o of the true cylindrical portion 2 is Vo = −・D・ω
−・(1). Also, the speed of the apex portion 4 is minimum when the radius R of the connecting portion 3 is infinite.
That is, when the height a of the apex part 4 becomes a=O and the connecting part 3 becomes a straight line 8, the minimum speed Vmin at that time is:
It is expressed as That is, depending on the selection of the height a of the apex portion 4, its speed changes within the range from Vo to Vmin.

Also, the height a of the apex portion 4 is determined by α, which is the central angle of the arc surface of the connecting portion 3
Then, a = R(1-cos-)
−(represented by 31. The speed Va of this apex portion 4 is represented by ratio can be selected.

When the strip is fed only by the true cylindrical portion 2, the strip does not come into contact with the apex portion 4, so the speed of the strip changes between Vo and Vmin. However, as described above, since the apex portion 4 is formed with the height a, the actual speed Va of the apex portion 4 is Vmin
becomes larger, and the rate of change in speed becomes smaller. Therefore, the change in tension applied to the strip is similarly reduced, making it possible to prevent the occurrence of wrinkles and suppress the occurrence of vibration.

In the above-described embodiment, a straight cylindrical portion 2 that is symmetrical with respect to the center of the outer peripheral portion 1 of the roller is formed, the angle of the straight line with respect to the axial direction is 56, and the length of the roller is 550
mm, the diameter of the true cylindrical part 2 is 160 mm, the radius R of the arc of the connecting part 3], 50 mm, the number of the true cylindrical parts 2 is 18
, a roller in which the cross-sectional curvature radius of the ridge line 5 at the boundary between the true cylindrical part 2 and the connecting part 3 is 1 mm, and the height a of the apex part 4 is Q, 4 mm; A soft aluminum foil having a width of 500 mm was fed by using a protruding part like a wheel and a conventional roller having no part corresponding to the apex part 4.

When the conventional roller was used, wrinkles occurred when the thickness of the fed soft aluminum foil was 50 μm or less. On the other hand, when the roller according to the embodiment of the present invention is used, the thickness of the fed soft aluminum foil is 15
Wrinkles did not occur until the thickness was reduced to below μm.

FIG. 4 is a sectional view of another embodiment of the present invention, showing a case where the connecting portion 3a between the true cylindrical portions 2 is polygonal, and the connecting portion 3a between the true cylindrical portions 2 is
The apex portion 4a at the intermediate position between the two is lower than the circle 7 having the diameter of the true cylindrical portions 2, and is higher than the straight line 8 connecting the true cylindrical portions 2 by an amount a.

Further, as in the previous embodiment, the true cylindrical portion 2 extends in the axial direction of the roller, and is symmetrical with respect to the center of the roller.
The pattern is a curved line or a straight line, and the height a of the apex part 4a is set so that a part of the true cylindrical part 2 or a part of the apex part 4 always comes into contact with the fed strip. This is to select the pattern of the true cylindrical portion 2.

In each of the embodiments described above, the true cylindrical portion 2 of the roller and the connecting portion 3 therebetween can be easily formed from a metal cylinder made of aluminum, stainless steel, etc. by numerical control processing. It can also be constructed from glass fiber reinforced synthetic resin or the like.

In addition, it can be used not only as a single roller to feed a strip, but also when multiple rollers are arranged at intervals and a strip is sequentially stretched and fed from each roller. can. In that case, the number of true cylindrical portions 2 of each roller should be different, or an odd number, so that although it is a slight change in the tension applied to the strip by each roller, the change should not be added. is necessary. This makes it possible to stably feed an ultra-thin strip without causing wrinkles, meandering, breakage, vibration, or the like.

〔Effect of the invention〕

As explained above, the present invention is a roller device consisting of a single roller or a plurality of rollers, and includes a true cylindrical portion 2 having a predetermined width and a predetermined interval in the circumferential direction, and a polygonal section between them. A connecting part 3 having a shape or a curved surface is formed, and an apex part 4 is formed on the connecting part 3, which is lower than the circle having the diameter of the true cylindrical part 2 and higher than the straight line connecting the ends of the true cylindrical part 2. Unlike a mere protrusion, the outer periphery of the perfect cylindrical part 2 is a perfect circular arc surface, so there is no local stress concentration area on the strip, and therefore there is no possibility of flaws or damage to the fed strip. This eliminates bending and prevents the strip from breaking. Further, since the true cylindrical portions 2 are formed at predetermined intervals, the occurrence of wrinkles can be suppressed. Furthermore, since the apex portion 4 is formed between the true cylindrical portions 2, changes in tension applied to the band-like body are reduced, and vibration and breakage can be prevented.

Furthermore, by forming the true cylindrical portion 2 and the apex portion 4 in the shape of an inclined straight line, a curved line, or a combination thereof that is symmetrical with respect to the center in the axial direction, a pulling force can be applied to the band-shaped body in the width direction. This prevents wrinkles from forming. Furthermore, if the belt-shaped body deviates from the center of the roller, a force is applied to return it to its original position, so meandering can be prevented.

Furthermore, by making the fed belt shaped body contact at least a portion of each of the true cylindrical portion 2 and the apex portion 4,
The change in tension on the strip is further reduced, and the strip with low mechanical strength is not plastically deformed.
Moreover, generation of vibration can be prevented.

Therefore, by using the single roller described above or a combination of multiple rollers, it is possible to prevent wrinkles, meandering, vibration, breakage, etc. from occurring in strips with low mechanical strength such as ultra-thin soft aluminum foil or synthetic resin film. This has the advantage of being able to feed stably without causing this.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of an embodiment of the present invention, Fig. 2 is a sectional view of an embodiment of the invention, Fig. 3 is a developed explanatory diagram of an embodiment of the invention, and Fig. 4 is a schematic perspective view of an embodiment of the invention. FIG. 3 is a sectional view of another embodiment of the invention. 1 is the outer peripheral surface, 2 is the true cylindrical part, 3 and 3a are the connecting parts, 4.4
a is the apex, 5 is the ridgeline, 6 is the rotation axis, D is the diameter of the true cylinder, 7 is the circle with the diameter, 8 is the straight line connecting the ridgelines, and a is the height of the apex. Patent applicant Rollchik Co., Ltd. Patent attorney
Akio Aitani Patent Attorney Hiroshi Watanabe Figure 1 Figure 2

Claims (3)

[Claims] (1) In a roller device having a single roller or a plurality of rollers for feeding a strip, the outer peripheral portion (1) is provided with true cylindrical portions ( 2) and a polygonal or curved connecting part (3) between the true cylindrical parts (2), and the connecting part (3) in the middle between the true cylindrical parts (2), The diameter of the true cylindrical portion (2) is lower than that of the diameter of the true cylindrical portion (2), and
A roller device characterized in that a vertex (4) is formed higher than the straight line connecting the ends of (2). (2) In a roller device having a single or plural rollers for feeding a strip, the outer circumferential portion (1) is provided with a roller extending in the axial direction and
1) A plurality of true cylindrical portions (2) are formed in the shape of inclined straight lines, curved lines, or a combination thereof, which are symmetrical with respect to the center of 1), and have a predetermined width at predetermined intervals in the circumferential direction; A polygonal or curved connecting part (
3), and the connection part (3) in the middle between the true cylindrical parts (2) has a diameter lower than that of the true cylindrical part (2) and an end of the true cylindrical part (2). A roller device characterized in that a vertex portion (4) is formed higher than a straight line connecting the portions. (3), the true cylindrical part (2) and the apex part (4),
The shape is selected such that at least a part of each is always in contact with the fed strip, the shape is selected at intervals along the circumferential direction and at an inclined straight line or curved line along the axial direction, or a combination thereof. The roller device according to claim 1 or 2.