JPH026004Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a belt conveyor roller made of plastic.

[Prior art]

The rollers used in conventional belt conveyors have metal bearing outer races fitted to the inner periphery of both ends of a metal cylinder, and a guide shaft fixed to the conveyor machine frame inserted into the inner periphery of the inner race of the bearing. However, if the material to be transported by the conveyor contains a lot of water, such as earth and sand excavated from the riverbed, or if the material other than earth and sand contains water, salt, or acid, the bearings may There are problems with early rusting, loss of smooth rotation, and bearing wear or sticking, and when used in such environments, the rollers must be replaced frequently along with the guide shaft. It is troublesome to handle, and since the rollers, bearings, etc. are all made of metal, the overall weight is also large.
Furthermore, if the rollers of the bearings are rotated while they are rusted, sparks will be generated, which can cause explosions and other dangers if accompanied by dust.

[Purpose of invention]

The present invention was devised in view of the above circumstances, and its purpose is to form the rollers from plastic, and to form the guide shaft from metal aggregates and a plastic outer layer that covers at least a portion of the surface of the aggregates. By being made of a covering material, there is no risk of rust even if the transported items contain moisture, salt, or acid, and they can rotate smoothly for a long period of time and have a significantly longer life with less wear. Moreover, it is an object of the present invention to provide a roller for a belt conveyor that can be significantly reduced in overall weight and is safe even when used in an environment with dust.

[Summary of the idea]

In this invention, the roller is made of plastic, and the guide shaft is made of metal aggregate and a plastic outer cover material that covers at least a part of the surface of the aggregate, thereby reducing the overall weight and improving the rotation of the roller. It is characterized by significantly reducing the wear associated with it.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Reference numeral 1 designates a guide shaft whose both ends are fixed to the machine frame (not shown) of a roller conveyor, and the outer periphery of an aggregate 2 made of, for example, a round steel bar is coated with a jacket material 3 made of a synthetic resin, such as 6-6 nylon. are integrally formed into a concentric ring shape by insert molding, and a flange 4 is integrally molded with the outer sheathing material 3 so as to be located approximately in the middle of the guide shaft 1 and facing outward. 5 is a plastic first and second
The rollers 6 and 7 are butted against each other and integrated by adhesive or the like, and shaft holes 6a and 7a formed in the center of the rollers are rotatably inserted into the outer circumference of the guide shaft 1. Reference numeral 8 denotes an annular recess formed in both the abutting portions of the first and second rollers 6 and 7, that is, the joint end surfaces, so as to be continuous with the shaft holes 6a and 7a, into which the collar 4 is inserted. The inner diameters of the shaft holes 6a and 7a are made approximately equal to the outer diameter of the guide shaft 1 at both ends of the roller 5, but the diameters on both sides of the recess 8 are larger than the outer diameter of the guide shaft 1 so that there is no space between them. A gap 9 is formed. Reference numeral 10 designates a plurality of thinning holes provided in the first and second rollers 6 and 7 so as to surround the shaft holes 6a and 7a. On the other hand, circular recesses 6b and 7b concentric with the shaft holes 6a and 7a are formed at both ends of the roller 5, that is, at the ends opposite to the abutting portions of the first and second rollers 6 and 7, respectively. Rubber annular seals 11, 11, which are in sliding contact with the end surfaces 6c and 7c of the first and second rollers 6 and 7, which are the bottoms of the recesses 6b and 7b, are press-fitted onto the outer periphery of the guide shaft 1. . 12, 12 is the recessed part 6b
Rubber annular seals 13, 13 are press-fitted onto the outer periphery of the guide shaft 1 so as to be in sliding contact with the end plates that are fitted into the inner circumferential stepped portions 6d, 7d of the guide shaft 1 and 7b.

As shown in FIG. 3, the rollers 5 are rotatably supported by guide shafts 1 which are horizontally and inclinedly fixed to the conveyor frame (not shown), and each roller 5 supports the conveyor belt 14. are guided, and the thrust load acting on each roller 5 is received by the collar 4.

According to the above structure, since the roller 5 is made of plastic and the outer covering material 3 of the guide shaft 1 is also made of plastic, the outer covering material 3 and the shaft holes 6a, 7
Since the coefficient of friction between the guide shaft 1 and the shaft holes 6a and 7a is extremely small, metal bearings are no longer necessary, and the material to be transported can be easily transported even if it contains moisture, salt, or acid. However, the influence of rust is completely eliminated, and the roller 5 can rotate smoothly for a long period of time, with little wear, resulting in a long life, and furthermore, the overall weight can be reduced. Furthermore, even if the rotation becomes heavy, there is no risk of sparks occurring.

In addition, in the above configuration, the guide shaft 1 is constructed by covering the outer periphery of the metal aggregate 2 with the plastic jacket material 3, so that the guide shaft 1 can be sufficiently strengthened. Not only can weight reduction be achieved, but the contact between the jacket material 3 and the shaft holes 6a, 7a of the roller 5 becomes plastic-to-plastic contact, making it possible to reduce friction as much as possible. This has the effect of significantly reducing the friction during rotation of the motor 5 and extending the service life. In addition, in this product, the flange 4 integrally molded on the outer sheathing material 3 of the guide shaft 1 provides
The central portion of the roller 5 formed by joining and integrating the first and second rollers 6 and 7 is configured to receive a thrust load applied to the roller 5, and the central portion of the roller 5 is free from dust and the like from the outside. Since this is a portion that is difficult to penetrate, there is an advantage that wear between the flange 4 and the roller 5, which receive thrust loads, can be reduced.

Furthermore, in the above configuration, the seals 11, 11 and 1
3, 13 and the end plates 12, 12 to form the shaft hole 6.
Since moisture, dirt, etc. are prevented from entering between a, 7a and the guide shaft 1, the shaft hole 6
Although it is possible to reduce the wear of the outer cover material 3 of the guide shaft 1 and the guide shaft 1, these structures may be added depending on the usage conditions.

In the above embodiment, the recess 8 for housing the collar 4 was formed in both the first and second rollers 6 and 7, but the recess 8 was formed only in the end surface of one of the rollers 6 and 7. It may be formed.

4 to 5 show other embodiments of the present invention, and only the parts different from those in FIGS. 1 to 3 will be explained. That is, the guide shaft 1' is constructed by making the metal aggregate 2' and the plastic sheathing material 3' eccentric, and arranging the outer periphery of the aggregate 2' and the outer periphery of the sheathing material 3' to partially touch each other. , and expose a part of the outer periphery of the aggregate 2' to the surface to open the shaft hole 6a of the roller 5.
and 7a. With such a structure, the wear resistance of the aggregate 2' is high, so that the life can be further extended.

6 to 8 show different embodiments of the present invention, and only the parts different from those in FIGS. 1 to 3 will be explained. That is, the metal aggregate 2'' is made eccentric with respect to the plastic sheathing material 3'',
The aggregate 2'' is not exposed to the surface of the outer covering material 3''. On the other hand, reference numeral 15 designates a block body made of polymeric plastic such as Nurite (trade name), one surface of which is formed into a circular arc surface 15a along the outer diameter of the outer sheathing material 3''. The guide shaft 1'' is configured so that it is insert-molded and integrated with the aggregate 2'' during formation, and the block body 15 is made of a material that has difficulty in forming, especially if it has excellent wear resistance. Since the block body 15 can be used facing the surface on which a load is directly applied, it is possible to further improve the wear resistance and extend the service life.

[Effect of idea]

As is clear from the above description, in the present invention, the roller is made of plastic, and the guide shaft is made of metal aggregate and a plastic outer cover material that covers at least a part of the surface of the aggregate. This makes it possible to reduce the overall weight and significantly reduce the wear caused by the rotation of the rollers, achieving a longer life.In addition, the flange integrally molded on the outer covering material of the guide shaft , 1st
The central part of the roller formed by joining and integrating the second roller is configured to receive the thrust load applied to the roller, and the central part of the roller is a part where it is difficult for dust etc. to enter from the outside. It is possible to provide a belt conveyor roller that can reduce wear between the roller and the flange that receives thrust load.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, with Figure 1 being a longitudinal sectional view, Figure 2 being a longitudinal side view, and Figure 3 showing the state in use with the machine frame removed. The longitudinal sectional view, FIGS. 4 and 5 show other embodiments of the present invention;
6 to 8 show different embodiments of the present invention, FIG. 6 is a cross-sectional view, and FIG. 7 is a cross-sectional view taken along the line - in FIG. 6. 8 are perspective views. In the drawing, 1 is a guide shaft, 2 is an aggregate, 3 is an outer covering material, 4 is a flange, 5 is a roller, 6 and 7 are a first
and a second roller, 6a and 7a are shaft holes, 8 is a recess, 14 is a conveyor belt, 2' and 2'' are aggregates,
3' and 3'' are outer covering materials, and 15 is a block material.

Claims (1)

[Scope of utility model registration request] A guide shaft that is fixed to a machine frame and is composed of a metal aggregate and a plastic outer covering material that covers at least a portion of the outer surface of the aggregate; A flange integrally formed with the guide shaft, and first and second rollers made of plastic are inserted into the outer circumference of the guide shaft from both ends of the guide shaft and supported rotatably. a roller formed by joining together end portions corresponding to the flange of the roller, and a recess formed to accommodate the flange in one or both of the joined end surfaces of the first and second rollers; A belt conveyor roller equipped with