JPH0353493B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a curved shaft roll having tapered ends to prevent a running object from deviating from the roller surface, and a part of the outer circumference of the roller being flattened in the axial direction. Regarding.

BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, rolls have been known in which a straight roller shaft is provided with rollers that taper from the center toward the ends. This roll has a function to prevent running objects from departing based on the difference in outer circumferential length in the axial direction.

However, there has been a problem in that when a running object is run in wide contact with the roller surface, uneven distortion occurs in the running object due to the curve in the axial direction of the roller surface. This problem becomes particularly noticeable when the running object is soft.

Means for Solving the Problems The present invention overcomes the above problems by tapering the ends of the rollers.

That is, the present invention consists of a roller with a tapered end, and a roller shaft that rotatably supports the roller and is bent only at the end, and a part of the outer circumference of the roller is flattened in the axial direction. The present invention provides a curved shaft roll having the following characteristics.

Function: By tapering the ends of the roller, it is possible to obtain a roll that has a function of preventing running objects from departing based on the difference in outer circumference.

On the other hand, by using a roller shaft with only bent ends, the roller surface is prevented or suppressed from curving in the axial direction at the tapered portion of the roller end, and a part of the outer periphery is flattened in the axial direction. It can be in the form of a roller.

Embodiment FIG. 1 shows an embodiment of the curved shaft roll of the present invention.
This is a roll R1 belonging to a straight line type, and consists of a roller shaft 1 and a roller 2. As shown in Figure 2,
The roller shaft 1 consists of a straight central portion 11 and curved end portions 12. The curved portions 12 at both ends are symmetrically formed and have the same radius of curvature. The roller 2 consists of a central portion 22 of the same diameter and a tapered end portion 21. The roller 2 is rotatably provided with respect to the roller shaft 1 via a plurality of cases 24 each housing a bearing 25, and its tapered portion 21 is arranged to correspond to the curved portion 12 of the roller shaft. As a result, in the figure, the outer side of the tapered portion 21 of the roller is raised and the upper portion 27 of the outer circumference of the roller forms a horizontal line (straight line) extending in the axial direction. Outer layer 23 of the roller
is made of rubber, and its tapered portion 21 is the roller 2.
The roller expands and contracts in the axial direction under the rotation of the roller, thereby enabling rotation about the roller axis in the embodiment.

In the figure, 3 is a sleeve for regulating the bearing spacing, 4 is an end flange attached to the end of the roller, 5 is a holding flange attached to the outside of the end flange, and 6 is for positioning each sleeve. A set sleeve 26 attached to the roller shaft is a ring of uniform thickness provided between the cases.

FIG. 3 shows another embodiment. This roll R2 belongs to the concave type and consists of the same roller shaft 1 as described above and the roller 7 whose central portion 72 is hourglass-shaped and whose end portions 71 are tapered. The internal structure is the same as the previous embodiment. The upper part 73 of the roller, which is the flattened part of the outer periphery of the roller in FIG.
forms a concave curve in the axial direction. The central portion 72 of the roller 7 is shaped like an hourglass and functions like an expander roll. In addition, in a concave type roll, the diameter of the small diameter side (tip side) of the tapered part of the end part 71 can be made smaller than the diameter of the small diameter part (center) of the hourglass-shaped part of the central part 72 of the roller. This is preferable from the viewpoint of the function of preventing departure of running objects.

FIG. 4 shows yet another embodiment. This roll R3 belongs to the convex type and consists of the same roller shaft 1 as described above and a roller 8 that is tapered from the center to the end. The internal structure is the same as in the previous embodiment. In FIG. 4, the upper part 83 of the outer circumference of the roller forms a convex curve in the axial direction. The roller 8 as a whole has a tapered shape and has a function of preventing the running object from running away from the roller, but due to the curve of the end 12 of the roller shaft, a part of the outer circumference of the roller is flattened in the axial direction. This flattened portion is formed around the roller upper portion 83 mentioned above.

In the present invention, a roller shaft having only bent ends is used. This prevents or suppresses the axial curve caused by the tapered portion of the roller end.
It can be in the form of a roller whose outer periphery is partially flattened (straight line, concave curve or convex curve). The bending of the roller shaft end may be based on curvature or may be based on bending. The degree of curvature or the bending angle may be within a range that allows rotation of the roller provided on the roller shaft via a bearing or the like as required. Generally, based on the radius of curvature, 9
The degree of curvature is from mm to 400m, or the bending angle is from 45 to 179.5 degrees. There are no particular limitations 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
It is 5m. Note that there are no particular limitations on the cross-sectional form or specifications of the roller shaft. In addition to the round rod body, a rod-like body 9 in the form of a combination of a plurality of plate-like objects so that the cross section becomes radial as shown in FIG. 5, or the rod-like body 9 as shown in FIG. 10, which is lightweight and has high bending strength, or which allows the roll to be cooled through the roller shaft.

The roller in the present invention is tapered at least at the end. Thereby, it is possible to obtain a roll having a function of preventing running objects from deviating from the roller surface. As is clear from the above embodiments, the center portions of the rollers have the same diameter;
It can be formed into a thick body or a narrow body. The shape of the roller when it is rotatably installed on the roller shaft is such that the outer circumferential line of the upper part of the roller is within the range where the center line of the roller shaft is concave in a silhouette when the roller shaft is projected onto a vertical plane. Straight line state (Fig. 1),
Alternatively, it may be in a concave state (FIG. 3) or a convex state (FIG. 4). The dimensions of the roller are 4 mm to 18 m in length, 10 mm to 10 m in outer circumference at the center, 5 to 45% in tapered end length (one side), and 0.5 mm to 0.5 mm in difference in outer circumference on both ends of the tapered part. 1m is common, but
Not limited to the above.

The roller is provided rotatably about the roller shaft. At that time, a rotation guarantee member or a rotation auxiliary member such as a bearing or a sliding bearing is used as necessary. Further, the roller is configured to be deformable under rotation about the roller axis. This allows rotation of the roller. Therefore, increasing the diameter of the roller,
Alternatively, an intermediate member may be used between the roller shaft or rotation guarantee member and the roller surface layer forming member if necessary for purposes such as reinforcement.
Spiral gap 31 is symmetrical as shown in the figure.
A material capable of allowing deformation of the surface layer of the roller, such as a cylinder 30 having a diameter of 32, is used. Incidentally, a cylinder member such as the cylinder 30 provided with a spiral gap or a bellows-shaped cylinder can also be used as a surrounding member such as a roller or a surface layer forming member of a roller.

The above-mentioned roller deformation types can be classified into amplitude type and expansion/contraction type. The amplitude type roller is one in which the axial bend formed by the outer shape of the roller changes in amplitude in the radial direction as the roller rotates about the roller axis. On the other hand, in the case of a telescopic roller, the surface layer of the roller expands and contracts in the axial direction like rubber, depending on the angle of rotation as the roller rotates about the roller shaft. The rollers in the embodiments described above are of the telescopic type.

To create an amplitude type roller, for example, the surface layer of the roller is formed of plates arranged in parallel in the axial direction.
This can be done by configuring the surface layer forming member to change its bending state while sliding in the axial direction with respect to an internal member such as an intermediate member in contact with the surface layer forming member as the surface layer forming member rotates.

On the other hand, in order to create a telescopic type roller, for example, a roller having a thick surface layer forming member with allowance for cutting allowance is rotatably mounted on a roller shaft that is in a predetermined bent state, and the roller shaft is vertically projected. The roller shaft is fixed by horizontally installing it in a concave state based on the above, and in this fixed state, the roller is sequentially fed out as the upper part of the roller under the rotation of the roller by a cutter etc. provided at a predetermined distance on the upper side of the roller. By cutting a predetermined portion of the surface layer of the roller that is coming in such a way that the top of the roller, which is successively formed as the roller rotates, forms a horizontal line (straight line), a predetermined concave curve, or a predetermined convex curve in the axial direction. It can be carried out. In this method, a roller with a tapered end is formed in the cutting process based on the distance relationship between each part of the roller shaft and the cutter.

As understood from the above, at least the surface layer of the roller is made of a material that allows deformation due to bending or a change in bending state in the case of the vibration type roller, and is made of a rubber-like material in the case of the telescopic type roller. Constructed of elastic, stretchable material. Therefore, examples of materials forming the roller surface layer include well-known materials such as wood, rubber, plastic, and ordinary metals, as well as Ni-Ti alloys and Cu-Zn-Al.
Examples include metals with rubber-like elasticity, such as alloys, and ceramics. Rubber-based rollers are preferable from the viewpoint of preventing slipping of running objects, and metal-based or ceramic-based rollers are preferable from the viewpoint of heat resistance or dust adhesion prevention properties due to conductivity.
Note that the roller may have grooves, protrusions, etc. on its outer periphery for appropriate purposes, such as draining water and preventing slipping. The roller may also be covered with a covering material such as cloth or sponge.

When running an object using the roll of the present invention, it is recommended 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 near-straight portion to prevent permanent deformation that is biased in the object. This is preferable in order to prevent or suppress the occurrence of such problems, and to allow the running object to broadly contact the roller surface and run stably at high speed.

In addition, the roll of the present invention has the length of the curved portion (in the case of an amplitude type roller, the straight line length ) is in an elongated state (on the contrary, it is in a contracted state when moving from the outer diameter side to the inner diameter side), so this can be used to apply a force in the width direction, such as a wrinkle smoothing force, to the moving object. I can do it. In this case, it is necessary for the running object to have a width that extends between the bends at both ends of the roller shaft.

An advantageous method of installing the rolls according to the invention is to arrange a plurality of rolls, usually a pair of rolls, opposite each other, and to introduce the running object between the rolls. According to this method,
Prevents running objects from slipping on the roller surface. Furthermore, in the case of an arrangement in which force is applied in the width direction, the forces from the respective rolls can be combined and applied to the traveling object. Note that there is no particular limitation on the combination of the pair of rolls in the facing arrangement, and the combination can be made as appropriate depending on the purpose, such as the shape of the facing part, the gap between each part of the facing part, or the contact pressure conditions. Particularly, in the case of a telescopic type roller, there is an advantage that the opposing portions can be placed in contact with each other in a compressed and flattened state based on its elasticity. In this case, the width of the running object is regulated, making it unnecessary to use separate rolls or the like to regulate the width of the running object. A more advantageous installation method for wrinkle smoothing processing, wrinkle processing, or rolling processing is as follows.
This is a method in which the rolls are placed facing each other with the roller portions compressed and flattened by combining the bending directions of the roller shafts to which the same widthwise force acts.

Effects of the Invention The roll of the present invention has a tapered end portion, so that it has a function of preventing running objects from departing from the roll. In addition, since a roller shaft with only bent ends is used, it is possible to form a roller with a part of the outer periphery flattened, and as a result, a running object can be caused to run in wide contact with the roller surface. As a result, the running object can be run more stably at a higher speed, and there are advantages such that uneven distortion is less likely to occur in the running object.

Furthermore, it has the advantage that the rolls can be advantageously arranged facing each other by utilizing the flattened portions of the rollers.

[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 portion of the roll, and FIG.
Figure 4 is a side view of another embodiment, Figure 5 is a side view of another embodiment, respectively.
6 is a perspective view illustrating another roller shaft, FIG. 6 is an end view illustrating another roller shaft, and FIG. 7 is a perspective view of a cylinder having a spiral gap. R1, R2, R3: curved axis roll, 1, 9, 1
0: Roller shaft, 12: Bent part of roller shaft,
2, 7, 8: roller, 21, 71, 81: tapered portion of roller, 27, 73, 83: flattened portion of outer periphery of roller.

Claims (1)

[Claims] 1. Consists of a roller with a tapered end and a roller shaft that rotatably supports the roller and is bent only at the end, with a part of the outer circumference of the roller being flattened in the axial direction. A curved axis roll characterized by: 2. The roll according to claim 1, wherein a part of the outer circumference of the roller forms a straight line in the axial direction. 3. The roll according to claim 1, wherein a part of the outer periphery of the roller forms a concave curve in the axial direction. 4. The roll according to claim 1, wherein a part of the outer circumference of the roller forms a convex curve in the axial direction. 5. The roll according to claim 1, in which a plurality of rolls are arranged facing each other.