JPH0672939U - Conveyor belt - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a conveyor belt which is excellent in various characteristics (for example, heat resistance) and in which conveyed articles are prevented from falling off. [Construction] A conveyor belt in which a core made of heat-resistant fiber is provided with a fluororesin coating layer which is thicker than the back side on the conveyance surface side, and the fluororesin coating layer is fired to heat-shrink the fluororesin and curved on the conveyance surface side. . [Effect] The above object is achieved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a conveyor belt. More specifically, the present invention relates to a conveyor belt which is excellent in various characteristics (for example, heat resistance) and is curved on the conveying surface side.

[0002]

[Conventional technology and problems to be solved]

 As is well known, conveyor belts are often used to convey various articles. Conveyor belts have been used for various purposes, and are used not only in continuous processes or continuous operations in indoor factories but also in various fields, and various characteristics are required.

For example, in a manufacturing or assembling factory of electric or electronic parts, the next process is performed in a hot state by soldering a small part or in a state of being adhered by applying a chemical agent such as an adhesive or a solvent. Often transported to.

[0004] Furthermore, soft and low-temperature food products such as freshly made ice cream at food factories and drug factories may be conveyed, or granular or powdered medicines may be conveyed.

In addition to this, there are many people who play games while smoking in a game hall such as a pachinko parlor, and the treatment of cigarette ash and cigarette butts has become a big environmental hygiene problem. For the most recent time, a conveyor belt was stretched across the front lower part of a large number of consecutive gaming machines, and the belt received the ash and cigarette butts from a smoker falling through an opening provided at an appropriate place. Measures for transporting and collecting are under consideration. In this case, of course, the belt must be made of a material that can withstand the high heat of ash and butts.

As described above, a wide temperature range can be used for transporting from a high temperature to a low temperature (+ 300 ° C. to −100 ° C.), a very light weight or a small size, a substance wet with chemicals, etc. There is a need for a conveyor belt that is made of a material that has heat resistance, cold resistance, chemical resistance, non-adhesiveness, etc., that can withstand, and that does not allow the material to drop during transportation.

There are various types of conveyor belts depending on the use, and a typical example thereof is a canvas made of natural fibers or synthetic fibers as a core body, and both sides thereof are covered with resin or rubber. There is something. However, such a conveyor belt usually does not have sufficient heat resistance and is not always preferable depending on the application.

[0008] By the way, when classifying the belt conveyors by the form of the conveying surface, there are ones having a substantially flat cross section in a direction perpendicular to the traveling direction of the conveying surface and ones having a concavely curved cross section. . A flat belt with a substantially flat cross section, that is, a flat belt, is preferable because the structure of the conveyor is simple, but there is a problem that the conveyed articles stacked on the conveying surface easily fall off from the conveying surface. was there. In particular, this problem tends to occur when transporting comparatively small and lightweight items.

This problem can be avoided by providing guide plates and the like at both ends of the belt on the conveying surface, but providing such guide plates complicates the structure of the conveyor and increases the cost. It is unavoidable, and it is not preferable in terms of maintenance and management of the conveyor.

On the other hand, a conveyor belt having a concave cross section is preferable in that the conveyed articles are hard to fall off, but a roller and a guide are required to keep the belt cross section curved, and therefore, the conveyor belt is required. Due to the complicated structure of the, there are problems in cost, maintenance, and management.

Therefore, the object of the present invention is that it can be used in a wide temperature range, has chemical resistance, non-adhesiveness, etc., and is highly heat-resistant, has chemicals attached to it, and is extremely lightweight. It is an object of the present invention to provide a conveyor belt that can convey the above without being damaged by them and without falling off in the middle.

[0012]

[Means for Solving the Problems]

 According to the present inventor, the core body and the covering layer are made of a specific material, and the conveying surface side covering layer is made thicker than the back side covering layer so that it is heat-shrinked, so that the conveyor belt itself is conveyed. By curving to the side, it is possible to prevent the articles from falling off without using special guide plates to prevent the articles from falling off or rollers or guides to bend the transportation surface, and to prevent various characteristics (such as heat resistance). It was found that it could provide an excellent conveyor belt of

Therefore, the conveyor belt according to the present invention is provided with a fluororesin coating layer on the conveying surface side of the core made of heat-resistant fiber, which is thicker than the rear surface side, and is baked to shrink the fluorine resin by heat. It is curved toward the transport surface.

[0014]

【Example】

 Hereinafter, the present invention will be described with reference to the drawings. What is shown in this drawing is a preferred embodiment of a conveyor belt according to the present invention. Therefore, it goes without saying that the present invention is not limited to these specific descriptions. FIG. 1 is a sectional view of a conveyor belt 1 according to the present invention, in which 2 is a conveyor belt core, 3 is a conveying surface side coating layer, and 4 is a back surface side coating layer.

The conveyor belt core body 1 according to the present invention is made of heat resistant fiber. Examples of such conveyor belt cores include those made of organic fibers such as aramid fibers or inorganic fibers such as glass fibers and ceramic fibers.

The conveying surface side coating layer of such a conveyor belt core is made of a fluororesin, specifically, a polymer or copolymer of, for example, polytetrafluoroethylene (trade name Teflon). . Such fluororesins are excellent in heat resistance, cold resistance, chemical resistance, electrical insulation, ultraviolet resistance, mechanical properties, and are non-adhesive. In the present invention, various fillers such as glass fiber can be added to the fluororesin.

The back-side coating layer can be made of the same material as or a different material from the above-mentioned transport-side coating layer, but is usually made of the same material as the transport-side coating layer, that is, a fluororesin. is there.

A conveyor belt including such a conveyor belt core, a transport surface-side coating layer, and a back surface-side coating layer is fired to heat-shrink the fluororesin and bend it to the transport surface side. Curvature is caused by the difference in heat shrinkage due to the difference in thickness between the transport surface side coating layer and the back surface side coating layer. It is necessary to provide a fluororesin coating layer that is thicker, that is, on the conveying surface side of the conveyor belt core than on the rear surface side.

The thickness of the transport surface side coating layer is preferably 3 times or more, particularly preferably 4 times or more the thickness of the back surface side coating layer. The thickness of the transport-side coating layer and the thickness of the back-side coating layer can be appropriately determined according to the type of each layer, the specific application of the conveyor belt, the size, the degree of curvature, and the like.

The firing temperature and firing time for bending should be appropriately determined according to the type of the conveyor belt core and each coating layer, the combination of each layer, the specific use of the conveyor belt, the size, the degree of bending, etc. You can For example, a conveyor belt having a belt width of 50 to 100 mm, a transport surface side coating layer thickness of 15 to 60 μm, and a back surface side coating layer thickness of 2 to 10 μm, using Teflon as a fluororesin, and having a curved height of about 5 to 30 mm is used. The preferable firing temperature for the purpose is 350 to 380 ° C., and the preferable firing time is 0.5 to 3 minutes. Although firing is usually performed in an electric furnace or a gas furnace, it is not always necessary to apply the same to the transport surface side coating layer and the back surface side coating layer.

The conveyor belt according to the present invention is intended to prevent the conveyed articles from falling off by curving the conveyor belt itself toward the conveying surface side. Therefore, the conveyor belt according to the present invention is suitable for carrying comparatively small and lightweight articles, especially those having a round shape and easy to roll, as compared with articles that are relatively heavy and highly stable. Since the surface side coating layer is made of fluororesin, it has excellent properties (eg heat resistance, cold resistance, chemical resistance, electrical insulation, UV resistance, mechanical properties) and is non-adhesive. It is excellent.

If a small amount, for example, about 2 to 5% of carbon powder, or powder of nickel, silver, or the like is mixed into this conveyor belt, the belt can have antistatic properties. The ashes and cigarette butts of the tobacco attached to the belt may not be easily peeled off due to the electrostatic effect, but the belt having the antistatic property can easily peel and remove them.

Therefore, the conveyor belt according to the present invention can be used for various articles such as electric parts (especially those during manufacturing or assembling process, such as soldering work, adhesive bonding work, and solvent cleaning work). ), Plastic pellets, pharmaceuticals (tablets), food (particularly softened and easily attached to the surroundings), powder (granule) or other (eg cigarette butts) It is particularly suitable.

As a conveyor belt suitable for such an application, for example, a belt width of about 50 to 100 mm, a belt length of about 3 to 20 m, a total belt thickness of about 0.25 to 1 mm, and a bending height of about 2 to 15 mm. There is something.

<Example 1> A conveyor belt having a total width of 100 mm and a total thickness of 540 μm, in which a fluororesin (trade name: Teflon) is applied on both surfaces of a conveyor belt core made of glass fiber in an amount of 5 μm each, and its conveying surface is The above-mentioned fluororesin was further applied to the above-mentioned surface by 10 μm to obtain a belt having a conveying surface side coating layer of 15 μm and a back surface side coating layer of 5 μm. This was subjected to calcination treatment (calcination temperature 380 ° C., calcination time 2 minutes) in an electric furnace to obtain a conveyor belt curved on the conveying surface side. The curved height (H) of this conveyor belt (conveyor belt A) was 16 mm.

Further, a conveyor belt in which the thickness of the fluororesin to be further applied only to the surface to be the transport surface side or the belt width is as shown in the following table is subjected to the same baking treatment, Conveyor belts (conveyor belts B to F) curved to the transport surface side were obtained. The curved height of each conveyor belt is as shown in Table 1.

Table 1 Conveyor belt Belt width Coating thickness Curvature height A 100 mm 10 μm 16 mm B 100 mm 20 μm 20 mm C 100 mm 50 μm 25 mm D 55 mm 10 μm 6 mm E 55 mm 20 μm 10 mm F 55 mm 50 μm 13 mm

[0028]

[Effect of device]

 The conveyor belt according to the present invention has excellent characteristics (eg, heat resistance). Further, the conveyor belt according to the present invention is one in which the conveyor belt itself is curved toward the conveying surface side by heat-shrinking the conveying surface side coating layer, and the conveyed articles are prevented from falling off. Therefore, in the belt conveyor, it is not necessary to use a special guide plate for preventing the falling of articles or rollers and guides for bending the conveying surface, so that the structure of the belt conveyor can be simplified and the cost can be reduced. Low and easy to maintain and manage. Further, the conveyor belt according to the present invention can be effectively used for treating cigarette ash and cigarette butts generated by a player's smoking, which is a problem especially in pachinko parlors, and is suitable for environments such as amusement halls. The contribution to improvement can be said to be great.

[Brief description of drawings]

FIG. 1 is a sectional view of a conveyor belt according to the present invention.

[Explanation of symbols]

 1 Conveyor Belt 2 Conveyor Belt Core 3 Conveying Surface Side Coating Layer 4 Back Side Coating Layer

Claims (1)

[Scope of utility model registration request] 1. A fluororesin coating layer, which is thicker than the back surface side, is provided on the carrying surface side of a core made of heat resistant fiber, and the fluororesin coating layer is fired to heat-shrink the fluororesin so that the carrying surface side is curved. Conveyor belt.