JPH0351928B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention has a tapered roller made of a cylinder having a spiral groove supported on a curved roller shaft, and has a function of preventing running objects from slipping off. This invention relates to a curved shaft thick roll that can apply force in the width direction.

BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, rolls have been known in which rollers of equal diameter are provided on a curved roller shaft. However, this curved shaft and equal diameter roll has a problem in that a separate prevention means must be used in order to prevent the running object from deviating from the roller surface.

Therefore, as a result of extensive research to solve this problem, the inventor of the present invention has found that even when a tapered roller is used instead of a roller of equal diameter to create a thick roll with a curved shaft, the roller can be rotated about the curved shaft. We have previously proposed a roll that can be used to prevent moving objects from moving away from the vehicle (Japanese Patent Application No. 61-51092, etc.).

Means for Solving the Problems The present invention improves the curved shaft thick roll proposed previously by using a cylinder having spiral grooves.

That is, the present invention includes a roller whose outer circumference length decreases from the center toward the end in the axial direction, and a curved roller shaft that rotatably supports this roller, and the roller rotates in opposite directions on the left and right. The present invention provides a curved shaft thick roll characterized in that a cylinder having a spiral groove is used as a constituent member.

Function: The cylinder having spiral grooves rotating in opposite directions on the left and right sides allows the roller to deform while rotating with respect to the curved roller shaft, and also reduces the diameter by reducing the gap distance of the spiral grooves during the rotation. This function acts as a force to tighten the internal members of the roller,
This increases the torsion resistance of the roller, resulting in a roll that can withstand high-speed rotation and high loads.

Embodiment FIG. 1 shows an embodiment of the present invention. This is a roll R1 belonging to a straight type, and consists of a curved roller shaft 1 and a roller 4. As is clear from FIG. 2, the roller 4 has a rubber layer 6 on the outer periphery of a tube 5 having a spiral groove. The roller 4 is rotatably provided with respect to the roller shaft 1 via a plurality of bearings 3. The outer shape of the roller 4 is such that the outer circumference length gradually decreases from the center to the end in the axial direction, and the roller R1 is installed in such a state that the curved roller shaft 1 forms a concave curve. In this case, the upper portion 4a of the outer circumference of the roller forms a straight line in the axial direction. As shown in FIG. 3, the spiral grooves 51 and 52 of the cylinder 5 rotate in opposite directions from the center. As a result, when the roller 4 rotates with respect to the roller shaft 1, each part of the roller can expand and contract in the axial direction corresponding to the rotation angle, and when the roller 4 rotates in the direction of the arrow, its spiral Tightening force is applied by reducing the gap between the grooves,
It has increased torsion resistance.

In the figure, 2 is a sleeve for maintaining the spacing between the bearings, 7 is an end flange attached to the end of the roller, 8 is a holding flange attached to the outside of the end flange, and 9 is for positioning each sleeve. This is a set sleeve attached to the roller shaft for this purpose.

FIG. 4 shows another embodiment. This roll R2 belongs to a concave type, and when the roll R2 is installed in a state where the curved roller shaft 1 forms a concave curve, the upper part 10a of the outer circumference forms a concave curve in the axial direction. have The structure is similar to that of the previous embodiment except that the outer shape of the roller 10 is different. As shown in FIG. 5, in the installed state of the concave type roll, the outer circumferential line in the axial direction is a straight line between the concave curved portion 10a on the upper part of the roller and the concave curved part 10c with a larger curve on the lower part of the roller. It has a portion 10b.

FIG. 6 shows yet another embodiment. This roll R3 belongs to a convex type, and when the roll R3 is installed in a state where the curved roller shaft 1 forms a concave curve, the upper part 1 of the outer periphery
A roller 1 in which 1a forms a convex curve in the axial direction.
1. The structure is similar to that of the previous embodiment except that the outer shape of the roller 11 is different.

The straight type, concave type or convex type curved shaft thick roll as described above can be produced, for example, as follows.

In other words, a roller having a thick rubber layer formed in advance to allow for cutting allowance is rotatably mounted on a roller shaft in a predetermined curved state, and the roller shaft has a concave curve based on vertical elevation projection. Install the roller horizontally and fix the roller shaft. Next, in this fixed state, predetermined portions of the rubber layer, which are sequentially sent out as the upper part of the roller, are formed in sequence under the rotation of the roller using a cutter or the like provided at a predetermined distance on the upper side of the roller. This can be done by cutting the top of the roller in the axial direction so that it has a predetermined shape. As a result, the upper part of the roller becomes a straight line (horizontal line), a predetermined concave curve, or a predetermined convex curve, and the roller is tapered due to the distance between the roller axis and the cutting position.

In the present invention, a curved roller shaft is used. As a result, as in the above embodiment, the roller can be tapered and have a part of the outer circumference flattened in the axial direction. The degree of curvature of the roller shaft is generally 9 mm to 400 m based on the radius of curvature, but is not limited to this, and it is sufficient as long as the roller provided on the roller shaft via a bearing, etc., can rotate if necessary. . There are no particular limitations on the length or diameter of the roller shaft; lengths of 8 mm to 20 m, lengths of 1 mm to
A diameter of 5m is common. Note that there are no particular limitations on the cross-sectional form or specifications of the roller shaft. In addition to the round rod as in the embodiment, for example, a rod-like body 12 in the form of combining a plurality of plate-like objects 13 such that the cross section becomes radial as shown in FIG. 7, or the rod-like body 12 as shown in FIG. It is also possible to use a type 14 in which the roller is housed in a pipe 15, a type that is lightweight and has high bending strength, or a type that allows the roll to be cooled via a roller shaft.

The roller in the present invention is formed into a tapered shape using a cylinder having spiral grooves rotating in opposite directions on the left and right sides as a constituent member. This tapered shape allows the roll to have a function of preventing deviation of running objects. In the present invention, the cylinder having the spiral groove may have a tapered shape and be used as a surface layer forming member of the roller, or the cylinder having the spiral groove and the same diameter may be given a tapered shape as in the above embodiment. It may be provided with a surface layer member for this purpose. As the surface layer material, in addition to rubber, materials having rubber-like elasticity such as Ni-Ti alloy, Cu-Zn-Al alloy, etc. are used. However, if it is formed into a form that allows expansion and contraction, such as the tube with the spiral grooves, there are no particular limitations on the material of its construction. Therefore, ceramics and the like can also be used. Rubber-based rollers are preferred from the standpoint of preventing slipping of running objects, and metal-based or ceramic-based rollers are preferred from the viewpoint of heat resistance or dust adhesion prevention properties due to conductivity. The roller may have grooves or protrusions on its outer periphery for appropriate purposes, such as draining water or preventing slipping. There are no particular limitations on the dimensions of the rollers. Generally, the length is 4 mm to 18 m, the outer circumference length of the center part is 10 mm to 10 m, and the difference in outer circumference length between the center part and the end part is 0.5 mm to 1 m. In addition, when the roller shaft of the concave type and convex type exhibits the maximum depression state, the gap d between the roller surface at the center of the upper part of the roller and the straight line connecting both ends of the roller is generally 0.1 mm to 10 cm. be.

The external shape of the roller when it is mounted on a curved roller shaft is like a silhouette when the curved roller shaft is projected onto a vertical plane, as in the embodiments shown in FIGS. 1, 4, and 6. The outer peripheral line of the upper part of the roller in the axial direction may be in a straight line, a concave state, or a convex state within a range in which the center line of the roller shaft is a concave curve.

Note that when the roller is provided so as to be rotatable with respect to the roller shaft, a rotation guaranteeing member or a rotation auxiliary member such as a bearing or a sliding bearing is used as necessary. Furthermore, a member that can be deformed under the rotation of the roller, such as a bearing case or rollers, may be used as an internal member of the cylinder having the spiral groove, if necessary.

The roll of the present invention is one in which the roller expands and contracts in the axial direction according to the rotation angle as the roller rotates about the roller shaft, and its length increases when moving from the inner diameter side to the outer diameter side of the roller shaft. When moving from the outer diameter side to the inner diameter side, it becomes a contracted state. Therefore, by utilizing this change, it is possible to apply a force in the width direction to the running object, that is, a force in the width expansion direction such as a wrinkle smoothing force, or a force in the width reduction direction such as a wrinkle forming force. Examples of its application include, but are not limited to, sheet-like materials such as metal foil, plastic film, cloth, and paper.

When running a running object using the roll of the present invention, using a portion where the axial outer circumferential line of the roller is straight or close to a straight line prevents or suppresses the occurrence of uneven permanent distortion in the running object. In addition, it is preferable to increase the regulating force or the acting force in the width direction due to wide contact with the roller surface, or to make the running object run stably at high speed.

An advantageous method of installing the rolls of the present invention is to arrange a plurality of rolls facing each other and introduce a running object between the rolls. According to this method, slipping of running objects on the rollers is further prevented. In addition, in the case of an introduction method in which force is applied in the width direction, the forces from the respective rolls can be combined and applied to the running object. Note that there is no particular limitation on the combination of the rolls arranged to face each other. When the surface layer of the roller is formed of a compressible material such as rubber, the facing portions may be placed facing each other in a compressed and flattened state. In this case, there are advantages such as no need to use separate rolls or the like to regulate the width of the traveling object.

Effects of the Invention Since the roll of the present invention uses a cylinder having spiral grooves, it has excellent torsion resistance, and enables running objects to run stably at high speeds and under high loads. Also,
It has a function to prevent running objects from departing based on tapered rollers.

On the other hand, since a curved roller shaft is used, although the roller has a tapered shape, the roller has a portion where the outer peripheral line in the axial direction is flattened. Thereby, the running object can be caused to travel while being in wide contact with the roller surface, and it is possible to run the object at higher speed and more stably. Moreover, in this case, uneven distortion is less likely to occur in the running object.

Furthermore, according to the roll of the present invention, it is also possible to apply force in the width direction to the running object.

[Brief explanation of drawings]

Fig. 1 is a side view of an embodiment of the roll of the present invention, Fig. 2 is an enlarged sectional view of the left part thereof, Fig. 3 is a perspective view of a cylinder having spiral grooves, and Fig. 4 is a side view of another embodiment. 5 is an explanatory diagram of the roller form, FIG. 6 is a side view of yet another embodiment, FIG. 7 is a perspective view showing an example of another roller shaft, and FIG. 8 is an illustration of yet another roller. It is an end view showing an example of a shaft. R1, R2, R3: Curved shaft thick roll, 1, 1
2, 14: Curved roller shaft, 4, 10, 11:
Tapered roller, 5: tube with spiral grooves,
6: Rubber layer, 4a, 10a, 10b, 11a: Flattened portion of roller.

Claims (1)

[Claims] 1. Consists of a roller whose outer circumference length decreases from the center to the end in the axial direction, and a curved roller shaft that rotatably supports this roller, and the roller rotates in opposite directions on the left and right. 1. A curved shaft thick-bodied roll characterized in that its constituent member is a cylinder having a spiral groove. 2. Claim 1, wherein when the roll is installed in a state where the vertical elevational projection of the curved roller shaft forms a concave curve, the upper part of the outer circumference of the roller forms a concave curve, a straight line, or a convex curve in the axial direction. Roles listed.