JPWO2014178161A1 - Transmission belt - Google Patents

Abstract

In order to realize a transmission belt that is simpler and has a wider range of use and capable of detecting wear even during use, the transmission belt of the present invention is a transmission belt that is wound around a pulley and transmits power, on the pulley contact side And a reinforcing cloth that reinforces at least the surface on the pulley contact side, and the bottom rubber layer contains a luminescent agent.

Description

  The present invention relates to a transmission belt.

  Generally, a transmission belt such as a V-ribbed belt or a V-belt is used as means for transmitting rotational power of an engine or motor used in various mechanical devices or automobiles. The transmission belt is gradually worn by a load applied when the rotational power is transmitted, and breakage such as a crack occurs. A worn or damaged transmission belt cannot transmit power properly and may be cut off during operation of the apparatus. Therefore, it is necessary to replace the power transmission belt in which the wear has progressed by a certain amount or has cracked.

  Conventionally, detection of wear and breakage of a transmission belt has been performed by visual inspection and / or inspection such as tension. Patent Document 1 proposes a technique for determining a wear state by providing a colored layer on the bottom surface of a V-belt and monitoring the remaining state of the colored layer. Further, Patent Document 2 proposes a technique for forming a conductive layer on a contact surface of a toothed belt with a pulley and measuring the electrical resistance to determine the wear state of the belt.

JP 2009-281780 A JP-A-2005-201408

  In order to confirm the wear of the belt by visual inspection or inspection, it is necessary to stop the apparatus using the belt, remove the belt, etc., and work takes time and effort.

  The invention of Patent Document 1 is based on a V-belt, and monitors that the colored layer provided on the bottom surface of the V-belt comes into contact with the pulley and is peeled off as a result of wear of the side surface of the V-belt or the side surface of the V-pulley. . Therefore, it cannot be applied immediately to other types of belts.

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

  In view of the above, an object of the present invention is to realize a transmission belt that is simpler and has a wider range of use and that can detect wear even during use.

  In order to achieve the above object, the transmission belt of the present invention is a transmission belt that is wound around a pulley and transmits power, and includes a bottom rubber layer disposed on the pulley contact side, and at least a surface on the pulley contact side. The bottom rubber layer contains a luminescent agent.

  According to such a transmission belt, deterioration can be detected by monitoring light emission of the luminescent agent. In other words, if the bottom rubber layer is covered with the reinforcing cloth, the luminescent agent of the bottom rubber layer does not emit light, or even if it emits light, it is not detected because it is covered with the reinforcing cloth. On the other hand, when the reinforcing cloth is worn and cracks are generated, for example, the luminescent agent in the bottom rubber layer emits light or light emission is detected. Therefore, by monitoring the presence / absence and intensity of light emission, the state of the transmission belt, such as wear of the reinforcing cloth, can be confirmed.

  Here, the light emission can be monitored while using the transmission belt, so that it is not necessary to stop the apparatus, remove the transmission belt from the apparatus, or the like. In addition, any belt such as a V-belt, a flat belt, a V-ribbed belt, or a toothed belt can be used as long as it is a transmission belt using a reinforcing cloth.

  The luminescent agent may emit light upon irradiation with ultraviolet rays.

  There are various types of light-emitting agents, and examples thereof include those that emit light when irradiated with ultraviolet rays. In this case, in order to confirm the state of the transmission belt, it is only necessary to examine the presence or absence of light emission and the intensity by irradiating with ultraviolet rays (for example, the intensity of light emission at the time when the transmission belt needs to be replaced is examined in advance. If the intensity of light emission is confirmed, replace the belt).

  Further, the luminescent agent may emit light upon contact with oxygen.

  Usually, since the reinforcing cloth does not block oxygen, the bottom rubber layer emits light even when the transmission belt is not used. However, this light emission is hidden by the reinforcing cloth covering the bottom rubber layer, and the apparent light emission is weakened. When such a transmission belt is used and the reinforcing cloth is worn or cracked, the light emission in the bottom rubber layer becomes easy to see. Therefore, it is possible to detect wear, cracks, and the like of the reinforcing cloth by monitoring the presence or absence of light emission and intensity.

  Further, the reinforcing cloth may cover the entire transmission belt.

  If it does in this way, degradation of a reinforcement cloth is detectable about each surface (a bottom face, a side surface, etc.) of a belt, for example.

  According to the transmission belt of the present invention, it is possible to detect the deterioration while using the transmission belt. Moreover, it is applicable to a wide variety of transmission belts.

FIG. 1 is a diagram illustrating a power transmission belt according to an embodiment of the present invention. 2A to 2G are views for explaining a method of manufacturing the transmission belt in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating an exemplary V-belt B (transmission belt) of the present embodiment. The V belt B is used for, for example, an agricultural machine or an industrial machine. The dimensions of the V-belt B are not particularly limited. For example, the belt circumferential length is 700 to 5000 mm, the belt width is 16 to 17 mm, and the belt thickness is 8 to 10 mm.

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

  Further, the entire belt main body 10 is covered with the reinforcing cloth 15, and the V-belt B is a wrapped belt.

  Although it does not specifically limit as a rubber component of the rubber composition which forms the bottom rubber layer 11, For example, 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 blend of a plurality of species.

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

  The light-emitting agent is not particularly limited, and may be either organic or inorganic, and a substance that emits fluorescence or phosphorescence, a substance that emits light by contact with oxygen, or the like can be used. For example, a coumarin compound that emits light by irradiation with ultraviolet rays is used, and about 5 to 30 parts by mass, more preferably about 10 to 20 parts by mass is blended with respect to 100 parts by mass of the rubber composition. If the blending amount is too small, sufficient light emission is not achieved. If the blending amount is too large, performance such as durability of the belt is deteriorated. Therefore, an amount in such a range is preferably blended.

  In addition to this, for example, a phosphorescent agent that is an alumina-based oxide, a distyryl-based luminescent agent, perylene, or the like may be used.

  Moreover, N nightlight (Nemoto Special Chemical Co., Ltd., aluminate compound type | system | group) which is a luminous agent can also be used. In this case, light is emitted by irradiation with visible light.

  Furthermore, DCJTB (4- (dicyanomethylene) -2-tert-butyl-6 (1,1,7,7-tetramethyljulolidyl-9-enyl) -4H-pyran, 4- (dicyanomethylene) -2-tert-butyl- 6- (1,1,7,7, -tetramethyljulolidyl-9-enyl) -4H-pyran).

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

  As carbon black, for example, channel black; furnace black such as SAF, ISAF, N-339, HAF, N-351, MAF, FEF, SRF, GPF, ECF, N-234; FT, MT, etc. Thermal black; acetylene black. Silica is also mentioned as a reinforcing agent. The reinforcing agent may be composed of a single species or a plurality of species. The reinforcing material preferably has a blending amount of 30 to 80 parts by mass with respect to 100 parts by mass of the rubber component from the viewpoint that the balance between wear resistance and bending resistance is good.

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

  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 cross-linking agent is preferably 0.5 to 4.0 parts by mass with respect to 100 parts by mass of the rubber component. .5 to 8 parts by mass.

  Antiaging agents include amine-based, quinoline-based, hydroquinone derivatives, phenol-based, and phosphite-based agents. The anti-aging agent may be composed of a single species or a plurality of species. The anti-aging agent is, for example, 0 to 8 parts by mass with respect to 100 parts by mass of the rubber component.

  Examples of the softener include petroleum softeners, mineral oil softeners such as paraffin wax, castor oil, cottonseed oil, sesame oil, rapeseed oil, soybean oil, palm oil, palm oil, fallen raw oil, waxy wax, rosin And vegetable oil-based softeners such as pine oil. The softener may be composed of a single species or a plurality of species. The amount of the softener other than the petroleum softener is 2 to 30 parts by mass with respect to 100 parts by mass of the rubber component.

  In addition, as a compounding agent, layered silicates, such as a smectite group, a verumulite group, a kaolin group, may be contained.

  Moreover, 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 short fibers, vinylon short fibers, aramid short fibers, polyester short fibers, cotton short fibers, and ultrahigh molecular weight polyethylene resins.

  Next, the adhesive rubber layer 12 and the back rubber layer 13 are configured in a strip shape having a horizontally long cross section. The adhesive rubber layer 12 and the back rubber layer 13 are formed of a rubber composition obtained by heating and pressurizing an uncrosslinked rubber composition in which various compounding agents are blended into a rubber component and then kneading and crosslinking with a crosslinking agent. .

  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), hydrogenated acrylonitrile 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.

  Examples of the compounding agent include a reinforcing material such as carbon black, a vulcanization accelerator, a crosslinking agent, an antiaging agent, a softening agent and the like, as in 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 a rubber composition having a different composition, or may be formed of a rubber composition having the same composition.

  Moreover, the core wire 14 is comprised by twisted yarns, such as a polyester fiber (PET), a polyethylene naphthalate fiber (PEN), an aramid fiber, a vinylon fiber. In order to give the core wire 14 adhesion to the belt main body 10, an adhesive treatment for heating after being immersed in an RFL aqueous solution before molding and / or an adhesive treatment for drying after being immersed in rubber paste is performed.

  The reinforcing cloth 15 is made of, for example, a woven fabric, a knitted fabric, a non-woven fabric, or the like formed of yarns such as cotton, polyamide fiber, polyester fiber, and aramid fiber. In order to provide the adhesiveness to the belt main body 10, the reinforcing cloth 15 is coated with rubber paste on the surface on the side of the belt main body 10 and / or an adhesive treatment in which it is immersed in an RFL aqueous solution and heated before molding. An adhesion treatment for drying is performed.

(Production method of transmission belt)
Hereinafter, the manufacturing method of V belt B which is a wrapped V belt is demonstrated with reference to Fig.2 (a)-(g).

  First, as shown in FIG. 2A, a rubber sheet 22 such as a chloroprene rubber composition for a compressed rubber layer is wound around a mantle 21 a plurality of times, and a rubber sheet 22 for an adhesive rubber layer is wound thereon. Furthermore, as shown in FIG. 2 (b), a core wire 14 such as a polyester cord to which an adhesive is attached is spirally wound. Further, as shown in FIG. 2C, the rubber sheet 22 for the adhesive rubber layer and the back rubber layer is wound to produce the cylindrical laminated structure 20.

  Next, as shown in FIG. 2 (d), the cylindrical laminated structure 20 is cut into a predetermined width on the mantle 21 and then removed from the mantle 21.

  Next, as shown in FIG. 2 (e), the annular laminated structure 20 is wound between a pair of pulleys with the rubber layer on the outer side, and both edges are cut obliquely while rotating to form a V shape. To skiving.

  Subsequently, as shown in FIG. 2 (f), lapping is performed by a belt forming cloth 25 that becomes the reinforcing cloth 15 so as to wrap the outer periphery of the annular laminated structure 20 skived into a V shape.

  Then, as shown in FIG. 2 (g), the lapped annular laminated structure 20 is externally fitted to a cylindrical mold 23, and the entire cylindrical mold 23 is placed in a vulcanizing can and heated and pressurized. At this time, the rubber component of the annular laminated structure 20 is cross-linked and integrated, whereby the belt forming cloth 25 becomes the reinforcing cloth 15 and the V belt B which is a wrapped V belt is manufactured.

  In addition, what contains a luminescent agent about all the rubber sheets 22 may be used, and only the rubber sheet 22 used as the bottom rubber layer 11 may contain the luminescent agent. Further, a rubber sheet 22 containing a luminescent agent is used only in a portion near the bottom surface of the bottom rubber layer 11 (for example, rubber containing a luminescent agent is used only for the several layers on the mantle 22 side in FIG. 2A). Sheet 22).

  In order to detect that the reinforcing cloth 15 on the bottom surface portion of the V-belt B is damaged, it is only necessary that the bottom rubber layer 11 (further, the bottom surface side of the bottom rubber layer 11) contains a luminescent agent. In order to reduce the cost of the luminescent agent, it is desirable to use rubber that does not contain the luminescent agent in other parts (back rubber layer 13 and the like). In addition, since it is conceivable that the properties of the rubber are changed (deteriorated) by blending the light-emitting agent, in such a case, it is better to use a rubber containing the light-emitting agent only in a portion that needs to emit light. . However, it is also possible to use a rubber containing a luminescent agent for the back rubber layer 13 and to detect damage to the reinforcing cloth on the back side.

  In the V belt B manufactured as described above, the belt main body 10 is covered with the reinforcing cloth 15 at the time of manufacture. Accordingly, for example, when the bottom rubber layer 11 is formed of rubber containing a luminescent agent that emits light by ultraviolet rays, even if the ultraviolet rays are irradiated, no light is observed because the bottom rubber layer 11 is not exposed to ultraviolet rays ( However, it is conceivable that slight light emission is observed when the reinforcing cloth 15 is relatively thin, the stitches are rough, or the like).

  On the other hand, if the V-belt B is continuously used, the reinforcing cloth 15 is damaged such as abrasion, cracking, and peeling, and the bottom rubber layer 11 is exposed. As a result, when the V belt B is irradiated with ultraviolet rays, the bottom rubber layer 11 receives the ultraviolet rays, and the blended luminescent agent emits light. By detecting such light emission (or detecting an increase in the intensity of light emission), the breakage of the reinforcing cloth 15 can be found. Such breakage can be detected even when the apparatus using the V-belt B is in operation. 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.

  In addition, even when a luminescent agent that emits light by contact with oxygen is used, light emission from the bottom rubber layer 11 is easily visible due to breakage of the reinforcing cloth 15. Therefore, the breakage of the reinforcing cloth 15 can be found by detecting the light emission (or the increase in the intensity).

  In the above, a V belt is taken as an example, and a wrapped belt in which the entire belt body made of a rubber composition is wrapped in a reinforcing cloth is taken as an example, but the invention is not limited to this. For example, even in a flat belt, a V-ribbed belt, a toothed belt, etc., breakage of the reinforcing cloth can be detected by light emission from the bottom rubber layer. Further, the pulley contact surface has a reinforcing cloth, but the side surface and / or the back surface may be a belt having no reinforcing cloth. In this case, when the reinforcing cloth on the pulley contact surface is broken, light emission is observed on the pulley contacting surface, so that the breakage of the reinforcing cloth can be found.

  The transmission belt according to the present disclosure is useful as a means for detecting the breakage of the reinforcing cloth during operation in various types of belts and transmitting rotational power of various mechanical devices and the like.

DESCRIPTION OF SYMBOLS 10 Belt main body 11 Bottom rubber layer 12 Adhesive rubber layer 13 Back rubber layer 14 Core wire 15 Reinforcement cloth 20 Laminate structure 21 Mantle 22 Rubber sheet 23 Cylindrical mold 25 Belt forming cloth

Claims (10)

A transmission belt that is wound around a pulley and transmits power,
A bottom rubber layer disposed on the pulley contact side, and a reinforcing cloth for reinforcing at least the surface of the pulley contact side,
The power transmission belt, wherein the bottom rubber layer contains a luminescent agent. The transmission belt according to claim 1,
The transmission belt, wherein the luminous agent emits light by irradiation with ultraviolet rays. The transmission belt according to claim 1,
The light-emitting agent emits light when contacted with oxygen. The transmission belt according to claim 1,
The transmission belt, wherein the luminescent agent is a substance that emits fluorescence or phosphorescence. The transmission belt according to claim 1,
The light-emitting agent is a coumarin compound, and is contained in an amount of 5 to 30 parts by weight with respect to 100 parts by weight of the rubber composition constituting the bottom rubber layer. The transmission belt according to claim 1,
The transmission belt is characterized in that the luminous agent is at least one of a coumarin compound, an alumina-based phosphorescent agent, a distyryl-based luminous agent, a perylene and aluminate compound-based luminous agent, and FCJTB. The transmission belt according to any one of claims 1 to 6,
The transmission belt, wherein the reinforcing cloth covers the entire transmission belt. The transmission belt according to any one of claims 1 to 7,
The bottom rubber layer has a laminated structure comprising a plurality of rubber sheets,
The plurality of rubber sheets include a rubber sheet containing the luminescent agent,
At least the rubber sheet on the pulley contact side is a rubber sheet containing the light-emitting agent. The transmission belt according to claim 8,
The transmission belt, wherein the plurality of rubber sheets include a rubber sheet that does not contain the luminescent agent. The transmission belt according to any one of claims 1 to 9,
The transmission belt includes a back rubber layer 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,
The power transmission belt, wherein the back rubber layer contains the luminescent agent.

Images