JPH0688713B2 - Curved shaft thick roll and pinch device - Google Patents

Description

Description: INDUSTRIAL APPLICABILITY The present invention relates to a roller shaft in which a central portion and both sides thereof are bent in different plane directions, and a tapered roller is rotatably provided on the roller shaft. The present invention relates to a curved shaft thick roll having a portion flattened in the axial direction and having a function of preventing deviation of a conveyed product and a width maintaining function, and a pinch device using the roll.

2. Description of the Related Art Conventionally, there has been known a crown-shaped roll in which a straight roller shaft is provided rotatably with tapered rollers from the central portion toward both ends. This roll has a deviation preventing function for preventing the conveyed product from deviating from the roller surface, based on the fact that the peripheral speed of the roller central portion due to the tapering state 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. In addition, although the peripheral speed of the central portion of the roller is high, the function of preventing deviation is provided, but on the other hand, there is a drawback that wrinkles are likely to occur on the conveyed product.

With respect to the problem of uneven distribution of the conveyed product, the present inventor has previously proposed a roll which overcomes this problem by using a curved roller shaft (Japanese Patent Application Nos. 60-255584 and 60-58).
-263552). That is, a roll having a tapered shape has been proposed in which a curved roller shaft is used and a part of the outer circumference of the roller is flattened in the axial direction. However, the problem that the conveyed product is easily wrinkled has not been sufficiently satisfied.

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. The roll has a width maintaining function.

That is, in the present invention, in a roll in which a tapered roller is rotatably provided on the roller shaft from the central part toward both ends, the roller shaft is bent at the central part, and both sides of the roller shaft are the bending planes of the central part. A curved shaft thick roll characterized in that it is bent in different directions 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 It is intended to provide a pinch device in which a pair of curved shaft thick rolls are arranged so that a flattened portion in a part of the outer circumference of the roller is axially opposed.

Action It is possible to make a roll that has a function of preventing deviation of conveyed goods, based on rollers that taper from the center to both ends.
Based on the bending of the central portion of the roll shaft, the tapered roller can 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. 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.

On the other hand, 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, it is possible to apply a force to the conveyed product in the direction of widening the width thereof, whereby a roll having a width maintaining function of the conveyed product can be obtained.

EXAMPLE FIGS. 1 to 3 show an example of the curved shaft thick roll of the present invention.
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 tapered shape from the axial center 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, the both sides are bent in the traveling direction of the conveyed product, and as a result, a part of the outer circumference is flattened based on the bending of the central portion of the roller shaft while maintaining the tapered shape of the roller (straight line, (Concave line or convex line) can be in the form of a roller, and based on the bending on both sides of the roller shaft center part,
As indicated by an arrow in FIG. 2, the roll can be a roll on which a force in a direction of widening the width acts on the conveyed object 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. Further, the bending degree of the both side portions (11) is appropriately determined according to the necessary width expanding force. Generally 5 mm to 3 based on radius of curvature
The bending angle is 45 to 175 degrees based on the bending degree or opening angle of 00m. 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 tapered shape. That is, the outer peripheral length of the roller is reduced from the central portion in the axial direction toward both ends. As a result, it is possible to obtain a roll having a function of preventing deviation of a conveyed product. As for the dimensions of the roller, the length is 4 mm to 18 m, the outer peripheral length of the central part is 10 mm to 10 m, and the difference in the outer peripheral length between the central part and the end is 0.5
mm to 1 m is common, but not limited to the above. The form of the roller when it is rotatably provided on the roller shaft is
Within the range in which the center line of the center of the roller shaft in the shadow picture when the roller shaft is projected on a vertical upright surface is in a concave state, the outer peripheral line in the axial direction of the roller upper part is a straight line (first line).
Figure), a concave line (Fig. 5), or a convex line (Fig. 6). In addition, concave type,
When using a convex type roll (R2, R3), the distance (d) 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 is It may be set appropriately according to the degree of shaft deflection, etc.
Generally, 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 if 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. The intermediate member is typified by a bearing case and rollers.
A material 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 installed horizontally so that the central portion of the roller shaft is in a concave state based on vertical elevation projection, and the roller shaft is fixed. 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 tapered 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 roller 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 width maintaining function, that is, the force for expanding the width of the conveyed product acts when the conveyed product is advanced in a direction in which the bends on both sides of the central portion of the roller shaft are tapered (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 the slip of the conveyed object on the roller surface, and also the synergistic action of the deviation prevention function and the width maintaining function based on each roll can be achieved. In the figure, 72 is a synchronous rotation gear fixed to the outer periphery of the end flange 40, 71 is a driving force transmission gear fixed to the outside of the gear 72, and in the present invention, the gear 72
Is often omitted, and the gear 71 is provided as needed. 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 a function of preventing deviation of a conveyed product because the roller is formed so as to taper from the central portion toward the end portion.

In addition, since the central portion of the roller shaft is bent, it has a flattened portion on the outer circumference even though it has a tapered roller shape, which allows the conveyed object to widely contact the roller surface and stably travel at high speed. be able to. 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.

Furthermore, 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, it is possible to exert a force in a direction of widening the width of the conveyed article traveling through the flattened portion. As a result, it is possible to prevent wrinkles from being formed on the conveyed product.

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 thick roll 10: Roller shaft 11: Both sides of central part of roller shaft 12: Central part of roller shaft 50,52,54: Roller 51,53,55: Flattened part of outer circumference of roller

Claims (2)

[Claims] 1. In a roll comprising a roller shaft rotatably provided with tapered rollers toward both ends from the central part, the central part of the roller shaft is bent and both sides thereof are different from the bending plane of the central part. A curved shaft thick roll characterized in that it is bent in a direction, 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. 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.