JPH0761802B2 - Ceramic conveyor belt - Google Patents

Description

TECHNICAL FIELD The present invention relates to a conveyor belt (chain) made of a ceramic material such as alumina or silicon nitride.

[Conventional technology]

Most conventional conveyors are mainly made of metal materials such as steel. Further, a flexible rubber-made one, a rubber belt having a ceramic plate adhered thereto for abrasion resistance, and the like have been used.

[Problems to be solved by the invention]

However, steel belts are prone to rust and wear, and chemical corrosion is added to mechanical wear when corrosive gas atmosphere or acid or alkaline liquid adheres, which doubles wear or cuts by brittle fracture. I was afraid.

In addition, when used in a high temperature atmosphere, the metal oxidizes and the strength is significantly reduced, and the thermal expansion causes the entire belt to stretch and hinder the transmission of driving force or synchronous operation. This causes inconvenience in meshing with the gear used in combination with the belt, resulting in uneven wear of the gear.

Further, in the case of using steel, in addition to being magnetized, there are many inconveniences due to having conductivity.

Similarly, a belt made of stainless steel is relatively excellent in terms of rust generation and corrosion resistance, but it has a large wear amount, poor durability, and is still weak against acid and alkali. Moreover, since the thermal expansion is large, the amount of expansion at high temperature becomes considerably large, especially when the entire length is long, and there is a problem that cannot be ignored in use.

On the other hand, rubber belts have the characteristics of elasticity, flexibility, and electrical insulation, but on the other hand, they are stretched with use and have a large amount of wear. It was unsuitable.

[Means for solving problems]

In view of the above, the present invention is characterized in that the link body, the link plate, the bar pin, and the fixing pin forming the conveyor belt are made of a ceramic material.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a conveyor belt.
Is constructed by connecting a link body 2 and a link plate 3 which are conveyor belt constituents with a bar pin 4, respectively. In this case, the bar pin 4 is integrally formed with a stopper 4a having a large diameter portion, and the other end of the bar pin 4 is provided with an annular groove 4b.

Therefore, the link body 2 and the link plate 3 are the bar pins 4
After being connected by inserting the U-shaped fixing pin 5 into the annular groove 4b as shown in FIG. Is rotatably supported by the bar pin 4. Such a U-shaped fixing pin 5 is made of a ceramic material like the other link bodies 2, link plates 3 and bar pins 4,
Since the protruding portion 5a is integrally provided inside the tip, U
Although it varies depending on the overall length, width, etc. of the U-shaped fixing pin 5 and also depending on the type of the ceramic material, the U-shaped fixing pin 5 makes use of this bending to cause the U-shaped fixing pin 5 to expand. After being inserted into and engaged with the annular groove 4b formed in, the projecting portion 5a stably stops with the annular groove 4b included, and the U-shaped fixing pin 5 is present in the annular groove 4b of the barbin 4. As a result, the structure of the belt conveyor 1 is maintained without disassembling the connection between the link body 2, the link plate 3, and the bar pin 4.

In addition, in order to function as the U-shaped fixing pin 5, it is necessary to make it as easy as possible to expand, and in order to be able to insert it into the annular groove 4b, the amount of bending is two legs as shown in FIG. In case of, at least 0.2mm is required.

By the way, the conveyor belt 1 according to the present invention is characterized in that the belt conveyor structure is formed of a ceramic material, and these link body 2, link plate 3, bar pin 4 are provided.
As the ceramic material forming the, there are the types listed in Table 1, and their physical and chemical characteristics are as follows.

As is clear from the physical properties of the ceramics shown in Table 1, the ceramic material is slightly inferior to the mechanical structural carbon steel which is a metal except for zirconia, but the ceramic material has a large hardness.
For this reason, the dimensional stability and wear resistance of the conveyor belt are increased.

Also, except for silicon carbide, it has excellent electrical insulation properties, is non-magnetic, has excellent corrosion resistance and heat resistance, and has a coefficient of thermal expansion that is extremely small compared to the metal ratio, so it is exposed to hot spots, acids, alkaline solutions and corrosive gases. It can withstand use in locations where it is exposed and can maintain durability and high precision.

Next, a link body 2, a link plate 3, a bar pin 4, a U-shaped fixing pin 5 which is a belt conveyor constituent body using the most general alumina ceramic among the ceramic materials.
As a manufacturing method for producing, for example, a minute amount of a sintering aid, a binder, etc. are added to highly sized alumina powder and pressure shaping is performed into a predetermined cylindrical or cylindrical shape mold, or suitable for alumina powder. A solvent, a dispersant, a softening agent and a binder are added, mixed, poured into a mold as slurry and dried, and the alumina sintered body obtained by firing at about 1650 ° C is polished. Etc., and then assembled as a belt. For silicon nitride, silicon carbide, etc., a method in which a predetermined silicon nitride mold is filled with a raw material powder and then baked by a so-called hot pressing method in which the material powder is baked is also applicable.

As a method of manufacturing the U-shaped fixing pin 5, a U-shaped fixing pin 5 may be formed by a powder pressing method, a casting molding method, or a rubber pressing method, in which a ceramic raw material powder is filled in a pin-shaped mold and molded. There are various methods such as a method of obtaining a shaped body of.

Further, although the bar pin 4 is shown with one end integrally formed with the stopper 4a, the present invention is not limited to this, and the U-shaped fixing pin 5 is also inserted at the other end to form an annular groove 4b for locking. It may be. As the annular groove 4b engraved on the bar pin 4, the U-shaped fixing pin 5 having a large rigidity and a small bending amount is inserted, so that the groove depth is required to be highly accurate.

When the conveyor belt 1 constituted by the link body 2, the link plate 3, the bar pin 4, and the U-shaped fixing pin 5 is damaged due to use, the U-shaped fixing pin 5 is removed. Alternatively, it is possible to disassemble by breaking or tearing down, and only the damaged parts such as the link body 2, the link plate 3, and the bar pin 4 can be easily replaced with new parts and repaired.

〔The invention's effect〕

As described above, the conveyor belt according to the present invention is extremely easy to assemble and disassemble, and since the constituent parts are made of a ceramic material, they have a large wear resistance, and thus are expected to last for a long time. It is possible to maintain the accuracy of, which is useful for constructing a precision drive system.

In addition, it has heat resistance, oxidation resistance, and a small coefficient of thermal expansion, so it can be used at high temperatures, and since it has high corrosion resistance, it can also be used for marine development, chemical plant relations, etc. In addition, since it is non-magnetic and electrically insulating, it is extremely useful as a configuration of a magnetic storage device that is not magnetic, a rotary drive component related to electronic equipment, and a carrier device. In addition, since it is non-toxic and does not denature at all even when it is boiled or sterilized with a disinfectant, it has a wide range of applications such as medical, food transportation, drying, freezing, heat treatment, chemical transportation, and semiconductor component firing. It is extremely useful as it can be applied to equipment.

[Brief description of drawings]

1 is a partial plan view of a ceramic conveyor belt of the present invention, FIG. 2 (a) is a sectional view taken along the line YY in FIG. 1, and FIG. 2 (b) is a perspective view of only a U-shaped fixing pin. is there. 1: Conveyor belt, 2: Link body 3: Link plate, 4: Bar pin 5: U-shaped fixed pin

Claims (1)

[Claims] 1. A conveyor belt in which ceramic bar pins are inserted into and connected to respective through holes formed in a ceramic link body and a link plate which are conveyor belt constituent bodies, and at least one end of the ceramic bar pins. 2. A ceramic conveyor belt, comprising a substantially U-shaped fixed pin made of ceramics, which is provided with a protruding portion on the inner side of the tip, and is engaged with the annular groove formed in.