JPH0688714B2 - Curved shaft thin roll and pinch device - Google Patents

Description

Description: INDUSTRIAL APPLICABILITY The present invention comprises a roller shaft having a central portion and both sides thereof bent in different plane directions, and a thin roller rotatably provided on the roller shaft. The present invention relates to a curved shaft body thin roll having a part flattened in the axial direction and having a function of preventing deviation of a conveyed product and an expander function, and a pinch device using the same.

2. Description of the Related Art Conventionally, there has been known a drum-shaped roll in which a straight roller shaft is rotatably provided with a cylindrical roller whose outer peripheral length increases from the central portion toward both ends. This roll is
It has an expander function based on the fact that the peripheral speed of the roller end portion due to its thin shape is high.

However, there is a problem in that when the conveyed object is made to widely contact the roller surface for traveling, the conveyed object is distorted due to a curve in the axial direction of the roller surface. This problem becomes particularly noticeable when the conveyed product is soft. Further, although the peripheral speed of the roller end portion is high to provide the expander function, there is a drawback that the conveyed product is likely to deviate from the roller surface.

With respect to the above-mentioned problem of uneven distortion of the conveyed product, the present inventor has proposed a roll that overcomes this problem by using a curved roller shaft (Japanese Patent Application No. 61-51091). That is, a thin roll having a flattened portion in the axial direction on a part of the outer circumference of the roller using a curved roller shaft was proposed. However, the problem that a conveyed product is likely to deviate has not been fully satisfactory.

Means for Solving the Problems The present invention uses a roller shaft in which a central portion and both sides thereof are bent in different directions in place of a uniformly curved roller shaft, whereby a conveyed product is added in addition to an expander function. The roll has a deviation preventing function.

That is, according to the present invention, in a roll having a roller shaft rotatably provided with rollers whose outer peripheral length increases from the central part toward both ends, the roller shaft is bent at the central part, and both sides of the roller shaft have central parts. It is bent in a direction different from the bending plane, and the roller rotates while expanding and contracting in the axial direction and forming a flattened portion in the axial direction in a part of the outer circumference. And a pinch device in which a pair of the above-mentioned curved shaft cylinder thin rolls are arranged so that the flattened portions in the axial direction in a part of the outer circumference of the rollers face each other.

Action An expander roll can be provided in which a force in the direction of expanding the width of the conveyed product acts on the basis of a cylindrical roller whose outer peripheral length increases from the central portion toward both ends. In the present invention, the force in the direction of expanding the width, that is, the expander function, can be used for preventing wrinkles from occurring and for expanding wrinkles, and in some cases, for expanding the width of a conveyed product.

On the other hand, based on the bending of the central portion of the roller shaft, the above-mentioned thin cylindrical roller may be a roll that rotates with respect to the roller shaft while forming a flattened portion in the axial direction on a part of its outer circumference. it can. As a result, it is possible to bring the conveyed object into wide contact with the roller surface and allow the conveyed object to travel while avoiding uneven distortion.

Further, by bending both sides of the bending portion of the central portion of the roller shaft in a direction different from the bending plane of the central portion, a portion bent in the traveling direction of the conveyed object is formed on both sides of the bending portion of the central portion of the roller shaft. Based on this portion, a force for maintaining the conveyed product on the roller surface can be applied, whereby a roll having a deviation preventing function for the conveyed product can be obtained.

EXAMPLE An example of the curved shaft body thin roll of the present invention is shown in FIGS.
The roll R1 is composed of a roller shaft 10 and a roller 50, and an upper portion 51 of the roller outer periphery forms a straight line in the axial direction. As is apparent from the front view of FIG. 1 and the plan view of FIG. 2, the roller shaft 10 has a central portion 12 that is curved, and both ends 11 and 11 thereof are in different directions from the curved plane of the central portion 12. It is bent. Bent portions 11 at both ends are formed symmetrically. The roller 50 has a shape in which the outer peripheral length increases from the central portion in the axial direction toward both ends. As shown in FIG. 4, the roller 50 is rotatably provided with respect to the roller shaft 10 through a plurality of cases 62 accommodating the bearings 61. The outer layer 63 of the roller 50 is made of rubber, and the outer layer 63 expands and contracts in the axial direction while the roller 50 is rotating, so that the roller 50 can rotate about the roller shaft.

In the figure, 40 is an end flange attached to the end of the roller, 30 is a holding flange attached to the outside of the end flange, and 20 is for positioning the sleeve 60 for regulating the spacing of the bearing 61. A set sleeve mounted on the roller shaft 10 and a ring 64 with a uniform thickness provided between the cases 62.

FIG. 5 shows another embodiment. This roll R2
Belongs to the concave type, the same roller shaft as above
10 and a roller 52 whose upper part 53 forms a concave line in the axial direction. The internal structure is the same as in the above embodiment.

FIG. 6 shows another embodiment. The roll R3 belongs to the convex type, and includes the same roller shaft 10 as described above and the roller 54 whose upper portion 55 forms a convex line in the axial direction. The internal structure is the same as in the above embodiment.

The concave type (R2) and convex type (R3) rolls described above compensate for the displacement of the roller due to the deflection of the roller shaft,
It is advantageously used for forming a linear flattening of a part of the outer circumference of the roller in the installed state or the operating state.

In the roller shaft used in the present invention, the central portion is bent, and both sides thereof are bent in a direction different from the bending plane of the central portion. As a result, both sides are bent in the traveling direction of the conveyed product, and as a result, the outer periphery is partially flattened based on the bending of the center of the roller shaft while maintaining the roller's thin shape (straight line). , Concave line or convex line) roller form, and based on the bending on both sides of the central part of the roller shaft,
As shown by the arrow in the figure, the roll can be made to have a function of preventing deviation of the conveyed product while traveling through the flattened portion of the roller. The bending of the central portion (12) of the roller shaft (10) may be within a range in which the roller provided on the roller shaft via a bearing or the like as required can rotate. Generally, the bending angle is 9 mm to 400 m based on the radius of curvature or the bending angle is 45 to 179 ° based on the opening angle. The degree of bending of both side parts (11) is appropriately determined according to the required deviation prevention force. Generally, the bending degree is 5 mm to 300 m based on the radius of curvature or the bending angle is 45 to 175 degrees based on the opening angle. There is no particular limitation on the length and diameter of the roller shaft. Generally, the length is 8 mm to 20 m and the diameter is 1 mm to 5 m. There is no particular limitation on the sectional shape or specifications of the roller shaft. In addition to round rods, rod-like bodies in which multiple plate-like objects are combined so that their cross-sections are radial, or those in which the rod-like bodies are housed in a pipe are lightweight and have high bending strength. It is also possible to use a roller that is capable of cooling, or a roller that can be cooled via a roller shaft.

The roller in the present invention is formed in a thin body shape. That is, the outer peripheral length of the roller increases from the central portion in the axial direction toward both end portions. Thereby, the roll having the expander function can be obtained. As for the size of the roller, the length is 4 mm to 18 m, the outer peripheral length of both ends is 10 mm to 10 m, and the difference in the outer peripheral length between the end and the center is 0.5 mm
1 m is generally, but not limited to the above. The form of the roller in the state of being rotatably provided on the roller shaft is such that the center of the roller shaft in the shadow picture when projecting the roller shaft on a vertical plane is in a convex state in the upper part of the roller. The outer peripheral line in the axial direction may form a straight line (FIG. 1), a concave line (FIG. 5), or a convex line (FIG. 6). When using concave type or convex type rolls (R2, R3), the distance between the roller surface at the center of the roller in the flattened part (lines 53, 55) and the straight line connecting both ends of the roller (D) may be appropriately set depending on the degree of deflection of the roller shaft, etc.
It is set to 0.1 to 50 mm.

The roller is provided rotatably with respect to the roller shaft. Therefore, the roller is configured such that at least the surface layer of the roller can expand and contract like a rubber in the axial direction according to the rotation angle thereof while rotating with respect to the roller shaft. As the material for forming the elastic roller, in addition to rubber or plastic having rubber-like elasticity, a metal or ceramic having rubber-like elasticity represented by Ni-Ti alloy, Cu-Zn-Al alloy, etc. can give. A rubber-based roller is preferable in terms of preventing slippage of the conveyed material, and a metal-based or ceramic-based roller is preferable in terms of heat resistance or dust adhesion prevention due to conductivity. The roller may have a groove, a protrusion, or the like on its outer periphery for an appropriate purpose, such as draining or slip prevention. Further, the roller may be covered with a covering material such as cloth or sponge. When the roller is rotatably provided on the roller shaft, a rotation assurance member or a rotation assisting member such as a bearing or a slide bearing is used as necessary.
Further, an intermediate member is used between the roller shaft or the rotation assurance member and the roller surface layer forming member such as a rubber layer, if necessary for the purpose of increasing the diameter of the roller or reinforcing the roller. As the intermediate member, a member such as a bearing case or a roller that allows the expansion and contraction of the roller surface layer is used.

The roll of the present invention can be produced, for example, by the following method. That is, first, a roller having a thicker surface layer forming member in consideration of a cutting margin is rotatably provided on a roller shaft in a predetermined bending state. Next, the roller shaft is fixed by horizontally installing it so that the central portion of the roller shaft is in a convex state based on vertical elevation projection. Then, in the fixed state, the roller is cut while being rotated by a cutter or the like provided on the upper side of the roller with a predetermined distance. At that time, with respect to the central portion of the roller shaft, a predetermined portion of the roller surface layer that is sequentially fed out as the upper portion of the roller is formed so that the top portion of the roller sequentially formed under the rotation of the roller has a straight line or a predetermined concave shape along the axial direction. It is cut so as to form a line or a predetermined convex line. On the other hand, for the curved parts on both sides of the central part of the roller shaft, while following the cutting line of the central part, slide the cutter etc. corresponding to the bending of the roller shaft so that the cutting position is directly above the roller shaft. To do. In the above manufacturing method, a thin roller is formed in the cutting process based on the distance relationship between each part of the roller shaft and the cutter or the like.

When traveling a conveyed product using the roll of the present invention, it is preferable to use a portion where the outer peripheral line in the axial direction of the roller is flattened, that is, a straight line or a portion close to a straight line, which causes a permanent strain biased to the conveyed product. It is preferable for preventing or suppressing the occurrence and for allowing the conveyed object to widely contact the roller surface and stably travel at high speed. Further, the deviation preventing function, that is, the force for maintaining the conveyed product on the roller surface acts when the conveyed product is advanced in the direction in which the bends on both sides of the central portion of the roller shaft are widened toward the end (FIG. 2).

An advantageous method of installing the rolls of the present invention is, as illustrated in FIG. 7, a system in which a plurality of, usually a pair of rolls R1 are arranged to face each other to form a pinch device, and a conveyed product is introduced between the rolls R1. According to the pinch method, it is possible to more effectively prevent slipping of the conveyed product on the roller surface, and it is possible to synergize the expander function and the deviation prevention function based on each roll. In the figure, 72 is the end flange 40.
The synchronous rotation gear fixed to the outer periphery of the gear 71, 71 is a driving force transmission gear fixed to the outside of the gear 72, the gear 72 can often be omitted in the present invention, the gear 71 is provided as necessary. To be Although the linear type roll R1 is used in the embodiment, the combination of the rolls arranged facing each other is not particularly limited, and the shape of the facing part, the gap between the facing parts, the contact pressure condition, and the like are linear depending on the purpose. The type, concave type, and convex type rolls can be appropriately combined.

EFFECTS OF THE INVENTION The roll of the present invention has an expander function because the roller is formed so as to taper from the end portion toward the central portion.

Also, since the central part of the roller shaft is bent, it has a flattened part on the outer periphery even though it is a thin roller shape, which makes it possible to bring the conveyed object into wide contact with the roller surface and stabilize it at high speed. Can be run. Further, there is an advantage that the transported object can be run in a flat state or a state close to a flat state, and uneven distortion is unlikely to occur in the transported object.

Further, since both sides of the central portion of the roller shaft are bent in a direction different from the bending plane of the central portion, a roll having a function of preventing deviation of the conveyed object can be obtained, whereby the conveying traveling through the flattened portion can be performed. It is possible to prevent the object from deviating from the roller surface.

In addition, by utilizing the flattened portion of the rollers, the pair of rolls can be arranged so as to face each other so that the gap or the contact pressure becomes constant in the axial direction, so that the pinch device having excellent pinch performance can be formed.

[Brief description of drawings]

FIG. 1 is a front view of a roll according to an embodiment, FIG. 2 is a plan view thereof, FIG. 3 is a left side view thereof, FIG. 4 is an enlarged sectional view of a left side portion thereof, and FIG. Front view, FIG. 6 is a front view of still another embodiment, and FIG. 7 is a front view of an example of a pinch device. R1, R2, R3: Curved shaft thin roll 10: Roller shaft 11: Both sides of the center of the roller shaft 12: Center of the roller shaft 50,52,54: Roller 51,53,55: Flattened part of the roller outer circumference

Claims (2)

[Claims] 1. A roll comprising a roller shaft rotatably provided with rollers whose outer peripheral length increases from the central portion toward both ends, and the roller shaft is bent at its central portion and both sides are bent at the central portion. A curved shaft cylinder thin roll, which is bent in a direction different from a plane, and rotates while expanding and contracting in the axial direction and forming a flattened portion in a part of the outer circumference in the axial direction. 2. A pinch device in which a pair of rolls according to claim 1 is arranged so that a part of the outer circumference of the rolls, which is flattened in the axial direction, faces each other.