JPH0734006Y2 - Conveyor belt - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention 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]

[Prior Art and Problems to be Solved] As is well known,
Conveyor belts are often used to convey various items. The use of the conveyor belt has been gradually expanded, and it is 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 factory for manufacturing or assembling electric or electronic parts, small parts are transferred to the next step in a hot state by soldering or in a state of being attached with chemicals such as an adhesive or a solvent. I often do it.

Further, there is a case where a soft and low-temperature food such as an ice cream which is freshly made in a food factory or a pharmaceutical factory is conveyed, or a granular or powdered medicine is conveyed.

In addition to this, there are many people who play a game while smoking in a game hall such as a conventional pachinko parlor, and the treatment of cigarette ash and cigarette butts has become a big environmental hygiene problem. Recently, in the process, I put a conveyor belt on the lower front part of a large number of consecutive game consoles, and received the ash and cigarette butts from the smoker falling from the opening provided appropriately with the belt and carrying it to an appropriate place. Measures are being considered. In this case, of course, the belt must be made of a material that can withstand the high heat of ash and butts.

Thus, from high temperature to low temperature (+30
(0 ℃ to -100 ℃), very light weight, small size, wet with chemicals, etc., heat resistance, cold resistance or chemical resistance that can withstand use in a wide temperature range. There is a need for a conveyor belt that is made of a material that also has adhesive properties, and that has a structure that prevents the material from falling during transportation.

There are various kinds of conveyor belts depending on the use. As a typical one, for example, a canvas made of natural fibers or synthetic fibers is used as a core, and both surfaces 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.

By the way, when classifying the belt conveyors by the form of the conveying surface, there are a belt conveyor having a substantially flat cross section in a direction perpendicular to the traveling direction and a belt having a concavely curved cross section. It can be said that a flat belt having a substantially flat cross section, that is, a flat belt is preferable in that 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 a relatively small and lightweight object is conveyed.

This problem can be avoided by providing guide plates or 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 whose cross section is curved in a concave shape is preferable from the viewpoint that articles to be conveyed are less likely to fall off, but rollers and guides are required to keep the cross section of the belt curved, so that the structure of the conveyor is reduced. Due to the complexity of the, there are problems with cost, maintenance and management.

Thus, 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]

According to the present inventor, the core body and the coating layer are made of a specific material, and the transport-side coating layer is made thicker than the back-side coating layer so that it is heat-shrinked. By curving the conveyor belt itself to the transport surface side, the transport articles can be prevented from falling without using a special guide plate to prevent the articles from falling or rollers or guides to bend the transport surface. It has been found that a conveyor belt having excellent properties (for example, heat resistance) can be provided.

Therefore, in the conveyor belt according to the present invention, a fluororesin coating layer, which is thicker than the back side, is provided on the conveying surface side of the core made of heat-resistant fiber, and is baked to shrink the fluororesin and convey it. It is made to bend to the surface side.

[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 the 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 1 according to the present invention is made of heat resistant fiber. As such a conveyor belt core, there is, for example, one 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 such as polytetrafluoroethylene (trade name: Teflon). . Such a fluororesin is excellent in heat resistance, cold resistance, chemical resistance, electrical insulation, ultraviolet resistance, mechanical properties, and is 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 carrying surface side coating layer, but is usually made of the same material as the carrying surface side coating layer, that is, a fluororesin. .

A conveyor belt comprising such a conveyor belt core, a transport surface side coating layer and a back surface side coating layer is
By firing, the fluororesin is thermally shrunk and curved to the transport surface side. The 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 back surface side.

The thickness of the transport side coating layer is preferably 3 times or more, more preferably 4 times or more the thickness of the back side coating layer. The thickness of the transport surface side coating layer and the thickness of the back surface side coating layer can be appropriately determined depending on the type of each layer, the specific use of the conveyor belt, the size, the degree of bending, and the like.

The firing temperature and firing time for bending should be appropriately determined depending on 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, and the like. You can For example, a belt width of 50 using Teflon as the fluororesin
˜100 mm, conveyance surface side coating layer thickness 15 to 60 μm, back side coating layer thickness 2 to 10 μm, the preferable firing temperature for making the conveyor belt having a curved height of about 5 to 30 mm is 350 to 380 ° C., The preferable firing time is 0.5 to 3 minutes. The firing is usually performed in an electric furnace or a gas furnace, but it is not always necessary to apply the same to the transport surface side coating layer and the back surface side coating layer.

The conveyer belt according to the present invention is intended to prevent the conveyed articles from falling off by curving the conveyer belt itself toward the conveying surface side. Therefore, the conveyor belt according to the present invention is suitable for carrying relatively small and lightweight articles, especially those having a round shape and easy to roll, as compared with articles having relatively heavy weight and high stability. 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 excellent non-adhesiveness. It is a thing.

If a small amount, for example, about 2 to 5% of carbon powder, or powder of nickel, silver or the like is mixed into the conveyor belt, the belt can have antistatic property. The ash, cigarette butts and the like 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 is
Various articles, such as electrical components (especially during manufacturing or assembly processes, such as those that have just been soldered, glued, solvent washed)
Plastic pellets, pharmaceuticals (tablets), foods (particularly softened and easily attached to the surroundings),
It is particularly suitable for conveying powder (granules) or other materials (for example, cigarette butts dust).

As a conveyor belt suitable for such use, 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.

<Example 1> A conveyer 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, respectively, The above-mentioned fluororesin is further applied to the above surface only by 10 μm so that the transport surface side coating layer is 1
A belt having a thickness of 5 μm and a backside coating layer of 5 μm was obtained. This is baked in an electric furnace (baking temperature 380 ° C., baking time 2
Min.) 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 or belt width of the fluororesin further applied only to the surface to be the transport surface side is as shown in the table below is subjected to the same baking treatment, The conveyor belts (conveyor belts B to F) curved to the 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]

The conveyor belt according to the present invention is excellent in various characteristics (for example, heat resistance). Further, the conveyor belt according to the present invention is one in which the conveyor belt itself is curved to 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, since it is not necessary to use a special guide plate for preventing the falling of articles or rollers or guides for bending the conveying surface, the structure of the belt conveyor is simplified and the cost is reduced. However, it is 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, etc. You can say that the contribution to

[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 conveying surface side of a core made of heat-resistant fiber, and the fluororesin coating layer is baked to heat-shrink the fluororesin so that the conveying surface side is curved. Conveyor belt.