KR20160003695A - Power transmitting belt - Google Patents

Abstract

In order to realize a power transmission belt which is simpler, easier, and has a wider range of use and which can detect wear during use, the power transmission belt of the present invention is a power transmission belt wound around a pulley to transmit power, And a reinforced fabric 15 reinforcing at least the surface of the pulley contact side. The bottom rubber layer 11 contains a light emitting agent.

Description

[0001] POWER TRANSMITTING BELT [0002]

The present invention relates to a power transmission belt.

BACKGROUND ART [0002] Generally, transmission belts such as V-ribbed belts and V-belts are used as means for transmitting rotational power of engines and motors used in various mechanical devices and automobiles. The power transmission belt is gradually worn down by a load applied when transmitting the rotational power, resulting in breakage such as cracking. Worn or damaged power transmission belts can not properly transmit power, and there is also a risk of being cut during operation of the apparatus. Therefore, it is necessary to replace the electric belt in which a certain amount of wear has progressed or cracks have occurred.

[0003] Conventionally, wear and breakage of a power transmission belt has been detected by eye observation and / or inspection of tension or the like. Patent Document 1 proposes a technique of forming a colored layer on the bottom surface of a V-belt and monitoring the remaining state of the colored layer to determine the wear condition. Patent Document 2 proposes a technique of forming a conductive layer on the contact surface of a toothed belt with a pulley and measuring the electrical resistance thereof to determine the wear state of the belt.

Patent Document 1: JP-A-2009-281780 Patent Document 2: Japanese Patent Application Laid-Open No. 2005-201408

In order to visually observe the wear of the belt or to confirm it by inspection, it is necessary to stop the apparatus using the belt, to separate the belt, and the like, which requires complicated and time-consuming work.

The invention of Patent Document 1 monitors the peeling of the coloring layer formed on the bottom surface of the V-belt as a result of the side surface of the V-belt or the side surface of the V-belt being worn as a result of contact with the pulley . Therefore, it is not directly applicable to other types of belts.

In the case of the invention of Patent Document 2, wear can be confirmed while the apparatus using the belt is operated. However, in order to use the belt of the present invention, it is necessary to provide a measuring device, a CPU, and the like for measuring the electrical resistance of the belt conductive layer in the apparatus, which causes a decrease in versatility and an increase in the cost of the apparatus.

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to realize a motor-driven belt that is simple, easy, and has a wide range of use and is capable of detecting wear during use.

In order to achieve the above object, a power transmission belt according to the present invention is a power transmission belt wound around a pulley to transmit power, comprising: a bottom rubber layer disposed on a pulley contact side; And a reinforced fabric, wherein the bottom rubber layer contains a light emitting agent.

According to such a transmission belt, deterioration can be detected by monitoring the light emission of the light emitting agent. That is, if the bottom rubber layer is covered with the reinforcing cloth, the light emitting agent in the bottom rubber layer does not emit light or, even if it emits light, it is not detected by being covered with the reinforcing cloth. On the other hand, when the reinforcing cloth is worn and, for example, cracks are generated, the light emitting agent in the bottom rubber layer emits light or the light emission is detected. Therefore, by monitoring the presence or the intensity of light emission, it is possible to confirm the state of the electric belt, such as abrasion of the reinforcing cloth.

Here, the light emission can be monitored while using the electric belt, and it is unnecessary to stop the apparatus, separate it from the apparatus of the electric belt, and the like. In the case of a power transmission belt using a reinforcing cloth, any type of belt such as a V-belt, a flat belt, a V-ribbed belt, and a cogged belt can be used.

Further, the light emitting agent may be one which emits light by irradiation of ultraviolet rays.

There are various kinds of luminescent agents, for example, those which emit light by irradiation with ultraviolet rays can be used. In this case, in order to confirm the state of the electric belt, the presence or absence of light emission and the intensity of light emission may be examined by irradiating ultraviolet light (for example, the intensity of light emission at the time when the electric belt needs to be replaced is checked in advance , And when the intensity of the light is confirmed, the belt is replaced).

The light emitting agent may be one which emits light by contact with oxygen.

Normally, since the reinforcing cloth does not block oxygen, the bottom rubber layer emits light even when the transmission belt is in an unused state. However, this luminescence is masked by the reinforcing cloth covering the bottom rubber layer, and the luminescence appears to be weak. When the reinforcing cloth is worn or cracks are generated in the reinforcing cloth by using such a power transmission belt, light emission of the bottom rubber layer is easily seen. Therefore, wear and cracks of the reinforcing cloth can be detected by monitoring the presence or absence of light emission and the strength.

The reinforcing cloth may cover the whole of the electric belt.

In this way, deterioration of the reinforcing cloth can be detected with respect to, for example, each surface (bottom surface, side surface, etc.) of the belt.

According to the power transmission belt of the present invention, deterioration of the power transmission belt can be detected while using the power transmission belt. It is also applicable to a wide variety of motorized belts.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a diagram illustrating a power transmission belt according to an embodiment of the present invention. FIG.
2 (a) to 2 (g) are diagrams for explaining a manufacturing method of the electric belt shown in Fig. 1.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing an exemplary V-belt B (electric belt) of the present embodiment. Fig. The V-belt B is used, for example, in agricultural machinery or industrial machinery. The size of the V-belt B is not particularly limited, but is, for example, 700 to 5000 mm in belt circumference, 16 to 17 mm in belt width, and 8 to 10 mm in belt thickness.

The V-belt B includes a bottom rubber layer 11 on the inner circumferential side (pulley contact side), an intermediate adhesive rubber layer 12, and a back rubber layer 13 on the outer circumferential side of the belt, And a belt main body 10 composed of a triple layer (layer) with a belt layer. A core wire 14 arranged to form a spiral having a pitch in the belt width direction is embedded in the adhesive rubber layer 12.

The whole of the belt body 10 is covered by the reinforcing cloth 15 and the V-belt B becomes a wrapped belt.

The rubber component of the rubber composition forming the bottom rubber layer 11 is not particularly limited, and examples thereof include ethylene-alpha-olefin elastomer, chloroprene rubber (CR) Chlorosulfonated polyethylene rubber (CSM), hydrogenated acrylonitrile rubber (H-NBR), and the like. The rubber component may be composed of a single species or a plurality of blended species.

Here, the rubber component forming the bottom rubber layer 11 contains a light emitting agent.

The light emitting agent is not particularly limited, but may be organic or inorganic, and may be a substance that emits fluorescence or phosphorescence, a substance that emits light by contact with oxygen, or the like. For example, 5 to 30 parts by mass, more preferably 10 to 20 parts by mass, of 100 parts by mass of the rubber component is blended using coumarin compound which emits light by irradiation of ultraviolet rays. When the blending amount is too small, it does not emit light sufficiently, and when it is too much, the performance such as durability of the belt is deteriorated.

In addition, for example, a phosphorescent agent, a distyryl-based light-emitting agent, perylene, which is an alumina-based oxide, or the like may be used.

It is also possible to use a phosphorescent agent such as NLIGHT (Nemoto & Co., ltd, aluminate compound). In this case, light is also emitted by the irradiation of visible light.

It is also possible to use DCJTB (4- (dicyanomethylene) -tert-butyl-6- (1,1,7,7-tetramethyljulolidyl) -9-enyl )) - 4H-pyran).

Examples of the other compounding agents include reinforcing materials such as carbon black, vulcanization accelerators, crosslinking agents, anti-aging agents, and softening agents.

As the reinforcing material, in carbon black, for example, channel black; Furnace black such as SAF, ISAF, N-339, HAF, N-351, MAF, FEF, SRF, GPF, ECF and N-234; Thermal blacks such as FT and MT; And acetylene black. As the reinforcing material, silica may be mentioned. The reinforcing material may be composed of a single species or a plurality of species. The reinforcing material is preferably blended in an amount of 30 to 80 parts by mass with respect to 100 parts by mass of the rubber component from the viewpoint of a good balance between abrasion resistance and bending resistance.

Examples of the vulcanization accelerator include metal oxides such as magnesium oxide and zinc oxide (zinc oxide), metal carbonates, fatty acids such as stearic acid, and derivatives thereof. The vulcanization accelerator may be composed of a single species or may be composed of plural species. The amount of the vulcanization accelerator is, for example, 0.5 to 8 parts by mass based on 100 parts by mass of the rubber component.

Examples of the crosslinking agent include sulfur and organic peroxides. As the crosslinking agent, sulfur may be used, organic peroxide may be used, or both of them may be used in combination. In the case of sulfur, the amount of the crosslinking agent to be blended is preferably 0.5 to 4.0 parts by mass per 100 parts by mass of the rubber component. In the case of the organic peroxide, the amount of the crosslinking agent to 100 parts by mass of the rubber component is, for example, 0.5 to 8 parts by mass.

Examples of the antioxidant include amine-based, quinolone-based, hydroquinone derivatives, phenol-based, and phosphorous-ester-based antioxidants. The antioxidant may be composed of a single species or a plurality of species. The antioxidant is contained in an amount of, for example, 0 to 8 parts by mass per 100 parts by mass of the rubber component.

Examples of the softening agent include mineral oil type softening agents such as petroleum softening agent and paraffin wax, castor oil, cotton seed oil, linseed oil, rapeseed oil, Such as rapeseed oil, soybean oil, palm oil, coconut oil, peanut oil, japanese wax, rosin, pine oil, and the like. Plant-based softeners. The softening agent may be composed of a single species or may be composed of plural species. The amount of the softening agent other than the petroleum softening agent is, for example, 2 to 30 parts by mass relative to 100 parts by mass of the rubber component.

As the compounding agent, a layered silicate such as a smectite group, a vermiculite group, or a kaolin group may be included.

Further, the bottom rubber layer 11 may contain a friction coefficient reducing material. Examples of the friction coefficient reducing material include short fibers such as nylon staple fibers, vinylon staple fibers, aramid staple fibers, polyester staple fibers, and short staple fibers, ultra high molecular weight polyethylene resins, and the like. .

Next, the adhesive rubber layer 12 and the back rubber layer 13 are formed in the shape of a rectangle having a long cross-section. The adhesive rubber layer 12 and the back rubber layer 13 are formed from a rubber composition obtained by blending a rubber component with various compounding agents and kneading the rubber composition with a cross-linking agent by heating and pressing.

Examples of the rubber component of the rubber composition forming the adhesive rubber layer 12 and the back rubber layer 13 include ethylene-α-olefin elastomer, chloroprene rubber (CR), chlorosulfonated polyethylene rubber (CSM) Rhenitrile rubber (H-NBR) and the like. The rubber component of the adhesive rubber layer 12 and the back rubber layer 13 is preferably the same as the rubber component of the bottom rubber layer 11. [

As the compounding agent, for example, a reinforcing material such as carbon black, a vulcanization accelerator, a crosslinking agent, an anti-aging agent, a softening agent and the like may be cited as well as the bottom rubber layer 11.

The bottom rubber layer 11, the adhesive rubber layer 12 and the back rubber layer 13 may be formed of rubber compositions of different formulations or may be formed of rubber compositions of the same composition.

The core wire 14 is composed of twisted yarns such as polyester fibers (PET), polyethylene naphthalate fibers (PEN), aramid fibers, and vinylon fibers. The core wire 14 is subjected to a bonding treatment for dipping in an RFL aqueous solution before molding and then heating and / or a bonding treatment for dipping in a rubber ball followed by drying in order to impart adhesiveness to the belt body 10.

The reinforcing cloth 15 is composed of a woven fabric, a knitted fabric, a nonwoven fabric, or the like formed of yarn such as cotton, polyamide fiber, polyester fiber, or aramid fiber. The reinforcing cloth 15 is subjected to a bonding treatment in which it is immersed and heated in an RFL aqueous solution before the forming process and / or a bonding treatment is performed on the surface of the belt body 10 on the side of the belt body 10, Followed by coating and drying.

(Method for manufacturing electric belt)

Hereinafter, a method of manufacturing the V-belt B which is a wrapped V belt will be described with reference to Figs. 2 (a) to 2 (g).

2 (a), a rubber sheet 22 such as a chloroprene rubber composition for a bottom rubber layer is wound a plurality of times on a mantle 21 and a rubber sheet 22 for an adhesive rubber layer is wound thereon Wind it. 2 (b), a core wire 14 such as a polyester cord with an adhesive is spirally wound thereon. 2 (c), a rubber sheet 22 for an adhesive rubber layer and a rubber sheet for a back rubber layer is wound to fabricate a cylindrical laminated structure 20.

2 (d), the cylindrical laminated structure 20 is cut to have a predetermined width on the mantle 21, and then separated from the mantle 21. Next, as shown in Fig.

Subsequently, as shown in Fig. 2 (e), the ring-shaped laminated structure 20 is wound around a pair of pulleys with the thick side of the rubber layer facing outward, edge is cut at an angle and skiving is performed in V shape.

Then, as shown in Fig. 2 (f), the belt-forming cloth 25 to be the reinforcing cloth 15 is formed so as to surround the outer periphery of the annular laminated structure 20 skewed in the V- As shown in FIG.

2 (g), the wrapped annular laminated structure 20 is fitted into the cylindrical metal mold 23 from the outside and put into a valcanizer together with the cylindrical metal mold 23 to heat and pressurize do. At this time, the rubber components of the ring-shaped laminated structure 20 are bridged and integrated so that the belt-forming cloth 25 becomes the reinforcing cloth 15 to produce a V-belt B which is a Rapt V-belt.

Here, all of the rubber sheets 22 may contain a light emitting agent, or only the rubber sheet 22 which serves as the bottom rubber layer 11 may contain a light emitting agent. Alternatively, only the rubber sheet 22 containing a light emitting agent (for example, only a few layers on the mantle 21 side of FIG. 2 (a)) is used only in a portion near the bottom of the bottom rubber layer 11, Or a rubber sheet 22 containing a light emitting agent).

The light emitting agent may be contained in the bottom rubber layer 11 (or the bottom surface side of the bottom rubber layer 11) in order to detect that the reinforcing cloth 15 in the bottom portion of the V-belt B is broken. In order to suppress the cost of the light emitting agent, it is preferable to use a rubber which does not contain a light emitting agent in the other portion (the back rubber layer 13, etc.). It is also conceivable that the characteristics of the rubber caused by blending the light emitting agent may change (deteriorate). In such a case, it is preferable to use a rubber containing a light emitting agent only in a portion where light emission is required. However, it is also possible to use a rubber containing a luminescent agent in the back rubber layer 13 to detect breakage of the back side reinforcing cloth.

In the V-belt B thus manufactured, the belt body 10 is covered with the reinforcing cloth 15 at the time of manufacturing. Therefore, for example, when the bottom rubber layer 11 is formed by a rubber containing a light emitting agent that emits light by ultraviolet rays, even if ultraviolet light is irradiated, ultraviolet rays do not reach the bottom rubber layer 11, (However, it is conceivable that slight luminescence is observed in the case where the reinforcing cloth 15 is relatively thin, the mesh is sparse, etc.).

On the other hand, when the V-belt B is continuously used, the reinforcing cloth 15 is damaged, such as abrasion, cracking, peeling, etc., and the bottom rubber layer 11 is exposed. As a result, when ultraviolet rays are irradiated on the V-belt B, the bottom rubber layer 11 receives ultraviolet rays, and the compounded light emitting agent emits light. By detecting such luminescence (or detecting an increase in luminescence intensity), breakage of the reinforcing cloth 15 can be found. Such breakage can be detected even when the apparatus using the V-belt B is operated. That is, in the state where the V-belt B is running, the presence or absence (or intensity) of light emission may be observed by irradiating ultraviolet rays.

Further, even in the case of using a luminescent agent emitting light by contact with oxygen, luminescence of the bottom rubber layer 11 is likely to be visible due to breakage of the reinforcing cloth 15. Therefore, it is possible to detect breakage of the reinforcing cloth 15 by detecting the light emission (or the increase in the intensity thereof).

In the above description, the V-belt is taken as an example, and the R-belt, in which the entire body of the rubber composition is wrapped by the reinforcing cloth, is not limited thereto. For example, breakage of the reinforcing cloth can be detected by light emission of the bottom rubber layer even in a flat belt, a V-ribbed belt, a fastening belt and the like. The pulley contact surface may have a reinforcing cloth, but the reinforcing cloth may not be provided on the side surface and / or the back surface. In this case, if the reinforcement of the pulley contact surface is broken, the light emission is observed at the pulley contact surface, so that breakage of the reinforcement can be found.

The power transmission belt of the present disclosure can detect breakage of the reinforcing cloth during operation in various kinds of belts and is useful as means for transmitting rotational power of various mechanical devices and the like.

10: Belt body
11: bottom rubber layer
12: Adhesive rubber layer
13: back rubber layer
14: core wire
15: Reinforcing cloth
20: laminated structure
21: mantle
22: Rubber sheet
23: cylindrical mold
25: Belt forming cloth

Claims (10)

1. A power transmission belt wound around a pulley to transmit power,
A bottom rubber layer disposed on the pulley contact side and a reinforced fabric reinforcing the surface of at least the pulley contact side,
Wherein the bottom rubber layer contains a light emitting agent. The method according to claim 1,
Wherein the light emitting agent emits light by irradiation of ultraviolet rays. The method according to claim 1,
Wherein the light emitting agent emits light by contact with oxygen. The method according to claim 1,
Wherein the light emitting agent is a substance which emits fluorescence or phosphorescence. The method according to claim 1,
Wherein the light emitting agent is a coumarin compound and contains 5 to 30 parts by mass of the rubber component per 100 parts by mass of the rubber component constituting the bottom rubber layer. The method according to claim 1,
The luminescent agent is at least one selected from the group consisting of a coumarin compound, a phosphorescent agent as an alumina-based oxide, a distyryl-based luminescent agent, a perylene and an aluminate-based phosphorescent agent, and DCJTB . The method according to any one of claims 1 to 6,
Wherein the reinforcing cloth covers the entire power transmission belt. The method according to any one of claims 1 to 7,
Wherein the bottom rubber layer has a laminated structure composed of a plurality of rubber sheets,
Wherein the plurality of rubber sheets comprise a rubber sheet containing the light emitting agent,
Wherein at least the rubber sheet on the most pulley contact side is a rubber sheet containing the light emitting agent. The method of claim 8,
Wherein the plurality of rubber sheets include a rubber sheet that does not contain the light emitting agent. The method according to any one of claims 1 to 9,
Wherein the power transmission belt includes a back rubber layer on the side opposite to the pulley contact side and an adhesive rubber layer sandwiched between the back rubber layer and the bottom rubber layer and including at least one core wire,
Wherein the back rubber layer contains the light emitting agent.

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