JPH07237729A - Roller for conveyor belt - Google Patents

Abstract

PURPOSE:To provide a roller to be applied to a center shaft when one bent center shaft is used in a holding tool for supporting at least the lower part of a conveyor belt positioned on the upper part, in the conveyor belt for conveying powder bodies, viscous bodies, etc. CONSTITUTION:In rollers 4 for a conveyor belt, the radius of the surfaces of rotating rollers 4, to be slidably moved to a center shaft 3 is so designed as to be larger toward right and left both ends, and the parts near the part to which the center shaft is slidably moved, and having the small radius in the width on the right and left both end side surfaces are projected to the right and left both sides, so as to fit to one bent center shaft 3, thereby the clearance between mutually adjacent rollers is set to be smaller as little as possible, and stress strain to the belt can be decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller used for a conveyor belt that conveys powder, viscous material and the like.

[0002]

2. Description of the Related Art A conveyor belt 1, as shown in FIG. 1 (a), is normally supported by drive pulleys 2 at both ends thereof, and has a shape close to a substantially flat surface near both ends as shown in FIG. 1 (b). In order to sequentially form the substantially cylindrical shape of the central portion as shown in FIG. 1C, the upper conveyor belt 1 is supported from below and the lower conveyor belt 1 is engaged from above. The rollers 4 are arranged in a substantially cylindrical shape (actually, a substantially polygonal shape) by gradually increasing the degree of curvature from a shape that is closer to a substantially flat surface in order. It is disclosed in the Japanese Utility Model Application Publication No. 8659.

However, in the prior art, the plurality of rollers 4 holding each conveyor belt 1 set the central axis 3 for rotation for each roller.

When such an individual central axis is used, the normal roller 4 has a cylindrical configuration as shown in FIGS.

However, in the conventional technique, the plurality of rollers 4 holding each conveyor belt 1 set the central axis 3 for rotation for each roller.

[0006]

However, in the structure in which the central axis 3 of rotation is separately provided, a large gap is inevitably formed between the adjacent rollers. For this reason, in the conventional conveyor belt 1, a configuration is adopted in which the designated positions of the rollers are crossed and both rollers are present in the traveling direction of the conveyor belt 1 at the intersecting portion. Is complicated in design. When a plurality of rollers are arranged in a line without reaching the intersecting state, a gap is inevitably generated as described above.
When rubber (including both natural rubber and synthetic rubber) is used as the material, even if it has plasticity based on the elasticity peculiar to rubber, the damage due to such a gap cannot be escaped.

For this reason, as shown in FIG. 2, at least in the upper belt 1, at a portion supported from below, a plurality of rollers 4 are fitted to one central shaft 3 and a plurality of rollers 4 are fitted. If the side surfaces of the rollers 4 adjacent to each other in the roller 4 are designed to be in contact with each other, the gap between the rollers is reduced, whereby the degree of breakage of the roller 4 due to bending stress in the gap can be reduced. The number can be reduced as compared with the case where the central shaft 3 is provided for each roller.

However, when cylindrical rollers 4 as shown in FIG. 2 (a) are used, the left and right ends of adjacent rollers 4 having the largest diameter inevitably come into contact with each other. However, since the rotation speeds of the respective rollers 4 due to the engagement with the belt 1 are not always the same, the contact portions are abraded and the life of the rollers 4 is shortened.

On the other hand, in consideration of the above points, as shown in FIG. 2B, even if the lateral width of each roller 4 is designed to be narrower as the diameter of the roller 4 increases, the central shaft 3
As in the case of FIG. 2A, the roller itself must be bent for each roller. Therefore, the left and right ends of the portion that slides with the central shaft 3 inside the roller 4 have the central shaft 3
The frictional resistance with the bent portion of the roller increases, which also affects the life of the roller 4.

In this way, the central axis 3 is shown in FIG.
As shown in (b), in the case of the bent shape, the wear of the roller 4 cannot be avoided.
Assuming that one curved central axis 3 is used,
The purpose is to provide a roller 4 corresponding to this.

[0011]

In order to solve the above-mentioned problems, the structure of the present invention is designed so that the diameter of the inner side surface which slides on the central axis of the rotating roller becomes larger toward the left and right ends, and Conveyor belt rollers are formed by projecting the widths of the left and right side surfaces on the left and right sides with respect to the small diameter portion near the center axis.

[0012]

In the above construction, the diameter of the surface of the roller that slides on the central axis is designed to increase toward the left and right ends, as shown in FIGS. 3 (a) and 3 (b). This is to adapt to any degree of bending of the central axis 3.

On the other hand, the width of both sides of the roller 4 is made to project to the left and right sides with respect to the portion having a small diameter in the vicinity of sliding with respect to the central shaft 3. This is to avoid contact between the left and right ends of the portion of the roller 4 having the largest diameter and the wear of the roller 4 in this portion due to the contact.

Of course, the protruding portions of the adjacent rollers 4 are
Wear occurs due to contact with each other, but the difference in rotation speed of this part is smaller than the case where the diameter is large, and the contact area can be set arbitrarily, so the wear of the parts to be joined The degree of can be designed smaller.

[0015]

Example 1 In Example 1, as shown in FIG.
In the vicinity of the portion having the smallest sliding diameter, the left and right cross-sections of the projecting portions on the left and right sides are curved outward.

This is nothing but the setting of the contact area between adjacent rollers as small as possible.

[0017]

Second Embodiment In the second embodiment, as shown in FIG. 5, a spiral groove 32 is formed on the inner surface that slides with the central axis.

By providing such a spiral groove 32, foreign matter such as dust that has entered between the central shaft 3 and the roller 4 or leaked conveyed goods is left and right outside along the groove 32. Can be discharged to.

[0019]

[Third Embodiment] In the third embodiment, as shown in FIG.
A plurality of ring-shaped grooves 41 are provided on the inner side surface of the roller 4 that slides with.

This is because the contact area between the central shaft 3 and the roller 4 is made as small as possible, thereby minimizing the friction between them.

[0021]

With the roller of the present invention having the above-described structure, a plurality of rollers fitted to one central shaft can support the conveyor belt, so that the gap between the rollers is set to the minimum. Therefore, even if a synthetic resin conveyor belt is used, it is possible to minimize damage due to stress distortion of the belt caused by the gap.

Particularly, in the case of the first embodiment, the damage due to the friction between the adjacent rollers can be minimized, and in the second and the third embodiments, the friction between the roller and the central shaft is set small. In particular, in the second embodiment, it is possible to discharge the foreign matter that has entered between the roller and the central shaft.

That is, the present invention has various advantages in that, by devising the above-mentioned shape of the roller, it brings about an important effect of extending the life of the conveyor belt and various other effects, The value of the present invention is enormous.

[Brief description of drawings]

1 (a), (b), (c): Lateral side view and vertical side sectional view, showing a state in which a cylindrical shape is being formed in a conveyor belt according to the related art.

2 (a) and (b): vertical cross-sectional view showing a situation in which a cylindrical roller or a roller in which both left and right ends thereof are tapered is used with respect to one bent central axis.

3 (a) and 3 (b): vertical side sectional view showing the principle of operation of the present invention.

FIG. 4 is a vertical cross-sectional view showing the configuration of Example 1 of the present invention.

FIG. 5: Vertical side sectional view showing the configuration of a second embodiment of the present invention.

FIG. 6 is a vertical side sectional view showing a configuration of a third embodiment of the present invention.

[Explanation of sign]

 1: Conveyor belt 2: Pulley 3: Central axis 4: Roller 41: Groove

Claims (4)

[Claims] 1. An inner diameter of a rotary roller that slides on a central axis is designed to increase toward the left and right ends, and the width of the left and right side surfaces is small in the vicinity of the central axis. Conveyor belt rollers based on protruding to the left and right 2. The roller for a conveyor belt according to claim 1, wherein the protruding left and right cross-sections on both the left and right sides are curved outward. 3. The roller for a conveyor belt according to claim 1, wherein a spiral groove is provided on the inner surface that slides on the central shaft. 4. The roller for a conveyor belt according to claim 1, wherein a plurality of circular ring-shaped grooves are provided on the inner surface that slides on the central shaft.