WO2019124457A1

WO2019124457A1 - Transmission belt and system for obtaining transmission belt status information

Info

Publication number: WO2019124457A1
Application number: PCT/JP2018/046847
Authority: WO
Inventors: 林　茂彦
Original assignee: 三ツ星ベルト株式会社
Priority date: 2017-12-19
Filing date: 2018-12-19
Publication date: 2019-06-27
Also published as: CN111492152B; CN111492152A

Abstract

The present invention relates to a transmission belt provided with a layered structure including: a rear surface layer disposed on the rear surface side; an inner surface layer disposed on the inner surface side; and a core wire layer having a core wire embedded between the rear surface layer and the inner surface layer, wherein the transmission belt has, as at least a portion of the layered structure, a sensor for detecting the status of the transmission belt.

Description

Transmission belt and state information acquisition system for transmission belt

The present invention relates to a transmission belt having a function of detecting the state of a transmission belt, and a system for acquiring state information of the transmission belt.

The power transmission belt is widely used as a power transmission belt for general industrial use, precision equipment and the like because it is excellent in appearance and hard to generate wear debris. Such a transmission belt is wound around the pulleys under tension, and when the transmission belt travels between the pulleys by the rotational drive of the pulleys, power is transmitted between the pulleys.

As described above, when the transmission belt travels between the pulleys, the transmission belt has a tension applied to the transmission belt itself, a propulsive force received by the rotational drive of the pulley, and a curved shape when the transmission belt travels the outer periphery of the pulley Continue to receive various external pressure and internal pressure (external force, internal force), such as the force to deform. If the transmission belt continues to be used under such external pressure and internal pressure, the transmission belt may be replaced because it is deteriorated due to the pressure applied to the transmission belt, the increase in internal temperature due to the pressure, and the influence of frictional heat. It will be necessary.

In this respect, the external pressure and the internal pressure to which the transmission belt is subjected change when there is age deterioration or damage associated with the use of the transmission belt. For example, deterioration or damage of the transmission belt weakens the tension applied to the transmission belt itself, weakens the propulsive force received by the rotational drive of the pulley, or changes the force applied when the transmission belt travels the outer periphery of the pulley Do. In addition, when the external pressure and the internal pressure received by the transmission belt change, the internal temperature of the transmission belt also changes.

Therefore, it is conceivable to introduce a mechanism for determining the replacement time by grasping the state of the transmission belt and detecting and observing the state of the transmission belt such as pressure and temperature applied to the transmission belt.

Such a mechanism is a technical field different from the present invention, but disclosed in Patent Document 1 as a configuration for detecting pressure, temperature, and vibration of a tire by arranging a sensor in a tire of a vehicle. .

Japanese Patent No. 5632519

However, in the tire described in Patent Document 1, the sensor can be disposed in a wide interior space for containing air. Although Patent Document 1 also discloses a mode in which the sensor is embedded in the rubber portion of the tire, the durability of the sensor only needs to consider the pressure received from the thickness direction of the tire and has a thickness greater than that of the tire. The characteristics of the external pressure and internal pressure applied to the thin transmission belt are different. Also, there is no mention or suggestion about the structure, location, or material that allows the sensor to withstand various external and internal pressures.

Therefore, in the present invention, various external pressure and internal pressure such as tension applied to the transmission belt itself, a propulsive force received by the rotational drive of the pulley, and a force that deforms in a curved shape when the transmission belt travels the outer periphery of the pulley A transmission belt and a state information acquisition system of a transmission belt capable of detecting and observing the state of the transmission belt in view of the peculiarity of the transmission belt which continues to be received.

The present invention is a laminate including a back layer disposed on the back side, an inner layer disposed on the inner side, and a core layer having a core embedded between the back layer and the inner layer. A transmission belt comprising a body, characterized in that the transmission belt has a sensor for detecting the state of the transmission belt as at least a part of the laminated body.

According to the above configuration, the sensor for detecting the state of the transmission belt can be detected and observed by being included in the laminate including the back layer, the core layer and the inner layer. Thereby, the state of the transmission belt can be accurately grasped and the replacement time can be determined.

In the transmission belt according to the present invention, preferably, the sensor is integrated as at least a part of the laminated body.

According to the above configuration, since the sensor is integrated with the transmission belt, the sensor is provided with strength, elasticity, durability, and the like to secure the function as a transmission belt for transmitting power without losing the appearance.

In the transmission belt according to the present invention, preferably, the sensor is disposed on the back side of the inner layer and at the center in the width direction of the transmission belt.

According to the above configuration, since the sensor is disposed at the central portion of the transmission belt in a sectional view, various pressures applied to the entire transmission belt, such as the pressure applied from the inner surface side of the transmission belt and the pressure applied from the back surface It is suitable for detecting and observing changes without deviation. Note that "disposed on the back side of the inner layer" means that the center of the sensor is present at 10% or more of the thickness of the inner layer from the center of the inner layer in the width direction cross section of the transmission belt. means. Further, "disposed at the center in the width direction" means that the center of the sensor is within ± 10% from the center of the inner surface layer in the width direction of the transmission belt.

In the transmission belt according to the present invention, preferably, the sensor is disposed on the back side of the back layer and at the center in the width direction of the transmission belt.

According to the above configuration, since the sensor is disposed at the widthwise central portion of the rear surface of the transmission belt, the transmission belt bends on the rear surface side of the transmission belt when the transmission belt is fitted in the groove provided on the outer periphery of the pulley. It is suitable for detecting and observing changes such as pressure that occur as Note that “disposed on the back side of the back layer” means that the center of the sensor is located on the back side of the center of the back layer in the widthwise cross section of the transmission belt.

In the transmission belt according to the present invention, preferably, the sensor is disposed on a surface of the inner surface layer in contact with a pulley around which the transmission belt is wound.

According to the above configuration, the sensor is disposed in the vicinity of the contact portion between the transmission belt and the pulley, so that a change in pressure or the like when the transmission belt wound around the pulley contacts the pulley is detected and observed It is suitable for you. The phrase "the inner surface layer is disposed on the side of the inner surface layer in contact with the pulley on which the transmission belt is wound" means that the center of the sensor is 10% or more from the center of the inner surface layer in the width direction of the transmission belt. , Means to be present on the side of contact with the pulley.

In the present invention, preferably, the transmission belt has a plurality of the sensors, and the plurality of sensors are arranged at predetermined intervals in the circumferential direction of the transmission belt.

In the transmission belt wound around the pulleys, when the traveling transmission belt contacts the pulleys, a pressure stronger than the pressure when traveling between the pulleys is instantaneously applied to the contact portion. The traveling speed of the transmission belt is calculated by dividing the predetermined interval (distance) by the time difference (time) detected by the sensor by detecting the strong pressure and the change caused thereby by the sensor arranged at the predetermined interval. be able to. Furthermore, the slip ratio of the transmission belt can also be calculated from the difference between the calculated traveling speed of the transmission belt and the rotational speed of the pulley measured separately.

In the transmission belt according to the present invention, preferably, the laminate further includes an outer cloth layer on at least a part of the outer periphery, and the sensor is included in at least a part of the outer cloth layer.

According to the above configuration, the sensor for detecting the state of the transmission belt is included in a part of the outer cloth layer of the laminate including the back layer, the core layer, the inner layer, and the outer cloth layer. The state of the surface of the object can be accurately detected and observed.

Further, according to the present invention, in the transmission belt, the transmission belt further includes a transmission unit for transmitting the state information of the transmission belt detected by the sensor to the outside, and the transmission unit is embedded in the back layer or the inner layer. Is preferred.

According to the above configuration, by embedding the transmitter in the back layer or the inner layer of the transmission belt, the function of the transmitter can be achieved without losing the appearance. Further, since the back layer or the inner layer of the transmission belt is a place where direct pressure is less likely to be applied compared to the surface, it is possible to avoid an excessive burden on the transmission part as the electronic device.

In the transmission belt according to the present invention, preferably, the sensor is a pressure sensor that detects a state of pressure applied to the transmission belt.

According to the above configuration, the pressure applied to the transmission belt can be detected and observed by the pressure sensor provided on the transmission belt. Then, it is possible to grasp the degree of deterioration or damage of the transmission belt, and the abnormality of the pulley or the like on which the transmission belt is wound, by the value of the detected and observed pressure.

In the transmission belt according to the present invention, preferably, the pressure sensor is a film-like piezoelectric material containing an organic polymer, in which a pair of electrodes are formed on both sides.

According to the above configuration, since the pressure sensor is in the form of a film, it can be employed even in a relatively thin transmission belt. Further, also in the manufacturing process, since it is only necessary to add the process of layering a film-like pressure sensor to the transmission belt configured as a laminate, the transmission belt can be efficiently transmitted while using the existing manufacturing process. It also contributes to the production of Further, since the pressure sensor is in the form of a film, it is suitable for detecting the pressure in the thickness direction of the pressure sensor.

In the transmission belt according to the present invention, preferably, the pressure sensor has a structure in which a pair of electrodes is disposed on both sides of a piezoelectric body in which piezoelectric powder is dispersed in a rubber composition.

According to the above configuration, the pressure sensor can be included in the transmission belt by dispersing and incorporating the piezoelectric powder in the rubber composition constituting the laminate. Further, also in the manufacturing process, since it is sufficient to add the process of mixing the piezoelectric powder to the rubber composition constituting the laminate, it is possible to efficiently manufacture the transmission belt while utilizing the existing manufacturing process. Also contribute. In addition, since the function as a piezoelectric body can be provided only by dispersing piezoelectric powder in a rubber composition mainly constituting a laminate, a desired portion can be functioned as a pressure sensor in a transmission belt. .

In addition, the present invention is a laminate including a back layer disposed on the back side, an inner layer disposed on the inner side, and a core layer having a core wire embedded between the back layer and the inner layer. Body,
A sensor provided on at least a part of the laminate for detecting the state of the transmission belt;
A transmission unit including a transmitter embedded in the back layer or the inner layer and transmitting to the outside the state information of the transmission belt detected by the sensor;
And a receiver for receiving the transmission belt status information transmitted from the transmission unit.

According to the above configuration, by disposing or bringing the receiver close to or away from the transmission belt provided with the transmission unit, the state information of the transmission belt detected by the sensor can be received. As a result, the state information of the transmission belt can be acquired from a location apart from the transmission belt traveling at high speed between the pulleys to a certain extent.

A special type of transmission belt that continues to receive various external pressure and internal pressure, such as the tension applied to the transmission belt itself, the propulsive force received by the rotational drive of the pulley, and the force that the transmission belt deforms in a curved shape when traveling along the outer periphery of the pulley. In view of the nature, it is possible to provide a transmission belt and a state information acquisition system for the transmission belt capable of detecting and observing the state of the transmission belt.

FIG. 1 is an explanatory view of a system for acquiring V-belt and V-belt pressure data according to the present embodiment. FIG. 2 is a partially enlarged top view of the V-belt FIG. 3 is a cross-sectional view of the V-belt 1 taken along the line AA. FIG. 4 is an explanatory view showing a state in which the V-belt 1 is fitted in V-grooves provided in the driving pulley 2 and the driven pulley 3. FIG. 5 is an explanatory view showing the arrangement position of the pressure sensor in the V-belt. FIG. 6 is an explanatory view of a V-ribbed belt according to another embodiment. FIG. 7 is an explanatory view of a toothed belt according to another embodiment. FIG. 8 is a cross-sectional view in the belt width direction of a V-belt provided with a pressure sensor having a piezoelectric material layer in which piezoelectric powder is dispersed in a rubber composition constituting the compression layer in a partial layer of the compression layer. FIG. 9 is a cross-sectional view in the belt width direction of a V-belt provided with a pressure sensor having a piezoelectric layer formed of a rubber composition in which piezoelectric powder is dispersed in the entire compression layer. FIG. 10 is a cross-sectional view of the center in the belt width direction of the toothed belt according to the embodiment. FIG. 11 is a layout of a traveling test apparatus used for a traveling test of a toothed belt according to an embodiment. FIG. 12 is a graph of experimental data representing a change in signal when the toothed belt according to the embodiment passes the pulley. (A) of FIG. 12 shows a signal when the toothed belt travels under normal tension, and (B) of FIG. 12 shows that the tension of the toothed belt is greater than that of (A) of FIG. Is a signal when traveling in a low condition.

(Embodiment)
A transmission belt and a transmission belt state information acquisition system according to the present invention will be described below with reference to the drawings.

In the transmission belt of the present embodiment, a V-belt 1 provided with a pressure sensor 16 will be described as an example. The V-belt 1 is used by being wound around, for example, a drive pulley 2 and a driven pulley 3 in a power transmission mechanism (system) such as an engine accessory drive system (see FIG. 1).

(Configuration of V-belt 1)
As shown in FIGS. 2 and 3, the V-belt 1 includes a stretch layer 11 (corresponding to a back layer) disposed on the back side of the V-belt 1 and a compression layer 12 disposed on the inner side of the V-belt 1. Core layer 13 including core wire 131 provided between the stretch layer 11 and the compression layer 12 and spirally embedded along the circumferential direction of the V-belt 1, and the V-belt The upper canvas 14 (corresponding to the outer fabric layer) disposed on the back surface of 1 and the lower canvas 15 (corresponding to the outer fabric layer) disposed on the inner surface of the V-belt 1 The two pressure sensors 16 disposed at a predetermined interval in the circumferential direction at the center in the width direction of the belt, and the transmitter 17 (a transmitter) disposed at one end side of the stretch layer 11 in the width direction of the V-belt 1 And the equivalent). In the V-belt 1 of the present embodiment, the upper canvas 14, the stretch layer 11, the core layer 13, the compression layer 12, and the lower canvas 15 constitute a laminate 10.

Further, as shown in FIG. 3, the cross section of the V-belt 1 in the width direction of the V-belt 1 is a V-shaped cross section, and the left and right side surfaces of the V-shaped cross section are provided on the drive pulley 2 and the driven pulley 3. It becomes a friction transmission surface in contact with the inner wall surface of the V-groove (see FIG. 4).

(Stretch layer 11)
The rubber component of the rubber composition forming the stretch layer 11 may be a vulcanizable or crosslinkable rubber, such as diene rubber (natural rubber, isoprene rubber, butadiene rubber, chloroprene rubber, styrene butadiene rubber (SBR), acrylonitrile) Butadiene rubber (nitrile rubber), hydrogenated nitrile rubber, etc.), ethylene-α-olefin elastomer, chlorosulfonated polyethylene rubber, alkylated chlorosulfonated polyethylene rubber, epichlorohydrin rubber, acrylic rubber, silicone rubber, urethane rubber, fluororubber Etc. can be illustrated. These rubber components may be used alone or in combination of two or more. Preferred rubber components are ethylene-α-olefin elastomer (ethylene-α-olefin rubber such as ethylene-propylene copolymer (EPM), ethylene-propylene-diene terpolymer (EPDM), and chloroprene rubber . Particularly preferred rubber components are ethylene-α-olefin elastomers excellent in durability to chloroprene rubber and containing no halogen. Examples of EPDM diene monomers include dicyclopentadiene, methylene norbornene, ethylidene norbornene, 1,4-hexadiene, cyclooctadiene and the like.

Further, the rubber composition forming the stretch layer 11 may further optionally contain carbon black, silica, reinforcing materials such as short fibers and the like, calcium carbonate, fillers such as talc, sulfur, Contains cross-linking agents such as organic peroxides, co-crosslinking agents such as N, N'-m-phenylenedimaleimide and quinone dioximes, vulcanization accelerators, plasticizers, stabilizers, processing aids, coloring agents, etc. You may Short fibers include cotton, polyester (PET, PEN, etc.), nylon (6 nylon, 66 nylon, 46 nylon, etc.), aramid (p-aramid, m-aramid), vinylon, polyparaphenylene benzobisoxazole (PBO) Fibers can be used. These short fibers can be used alone or in combination of two or more.

(Compressed layer 12)
The compression layer 12 may be formed of the same as the rubber composition forming the stretch layer 11.

(Core layer 13)
In the cord layer 13, cords 131 are embedded in the rubber composition in a spiral shape along the circumferential direction of the V-belt 1. The rubber composition constituting the core layer 13 is more adhesive than the rubber composition of the stretch layer 11 or the compression layer 12 from the viewpoint of adhesion to the core 131 and stress relaxation on the core 131. A compounding composition that emphasizes stress resistance is preferred. As a result, the core wires 131 embedded in a spiral shape are arranged in a state of being separated by a predetermined distance in the width direction in a cross-sectional view of the V-belt 1 in the width direction.

From the viewpoint of high modulus, polyester fibers comprising C2-4 alkylene arylate such as ethylene terephthalate or ethylene-2,6-naphthalate as the main constituent unit (polyalkylene arylate fibers, polyethylene terephthalate, etc.) Synthetic fibers such as base fibers, polyethylene naphthalate fibers etc.), aramid fibers etc., inorganic fibers such as carbon fibers are used, and polyester fibers and aramid fibers are preferred. These fibers may be multifilament yarns. The fineness of the multifilament yarn may be 2000 to 10000 denier, preferably 4000 to 8000 denier.

As the core wire 131, a twist cord (multi-twist, single twist, rung twist, etc.) using multifilament yarn is often used, and the average wire diameter of the core wire 131 (fiber diameter of the twist cord) is 0. It may be 5 to 3 mm, preferably 0.6 to 2 mm, and more preferably 0.7 to 1.5 mm.

In the present embodiment, a single continuous core wire 131 is spirally wound and embedded in the circumferential direction of the V-belt 1, but a plurality of bundled core wires 131 are spiraled in the circumferential direction of the V-belt 1 It may be wound and embedded in a shape.

(Upper canvas 14 and lower canvas 15)
The upper canvas 14 and the lower canvas 15 are made of, for example, cotton, polyester fiber, nylon or the like, and are fabrics woven into plain weave, twill weave, satin weave, etc., and the crossing angle between warp and weft is extended to about 90 ° to 120 °. It is an angled woven fabric.

(Pressure sensor 16)
The pressure sensor 16 uses, for example, a piezoelectric element that generates an electric charge when receiving pressure. As shown in FIG. 3, the electrode layers 161 and 162 are formed on both sides of a film-like piezoelectric layer 163 containing an organic polymer. Is equipped. In the present embodiment, the thickness of the piezoelectric layer 163 is about 1 to 10 μm, the thickness of the electrode layers 161 and 162 is also about 0.1 to 0.3 μm, and the pressure sensor 16 is thin. The pressure sensor 16 is electrically connected to the transmitter 17 from the electrode layers 161 and 162. Further, in the present embodiment, as shown in FIG. 2, two pressure sensors 16 are arranged at predetermined intervals in the circumferential direction.

The material of the piezoelectric layer 163 may be polyvinylidene fluoride, a copolymer of vinylidene fluoride and trifluoroethylene, polylactic acid, vinylidene cyanide polymer, odd nylon such as nylon 9 or nylon 11, aramid, polyurea, etc. It can be mentioned.

Further, as the electrode layers 161 and 162, a vapor deposition film, a metal net or wire, and a conductive rubber can be exemplified. Furthermore, as the vapor deposition film, aluminum (Al), iron (Fe), copper (Cu), gold (Au), silver (Ag), and alloys thereof can be exemplified besides Ni—Al alloy. Moreover, as a metal net | network and wire, iron (Fe), copper (Cu), a copper alloy, an aluminum alloy etc. can be illustrated. Further, as the conductive rubber, it is possible to exemplify a rubber composition used for the compression layer or the stretch layer, which is formed into a sheet having a thickness of 10 μm to 5 mm.

In addition, the electrode layers 161 and 162 may be subjected to surface treatment for bonding (unification) with the surrounding rubber layer (portion including the rubber composition in the laminate 10) by chemical or physical bonding. preferable. As this surface treatment, coating (lamination) of a resin film, silane coupling treatment, etc. may be mentioned.

As described above, since the pressure sensor 16 is in the form of a film, the pressure sensor 16 can be integrated into the laminate 10 even in the V-belt 1 having a relatively small thickness. Further, also in the manufacturing process, since it is only necessary to add the process of layering the film-like pressure sensor 16 to the V-belt 1 configured as the laminate 10, it is efficient while utilizing the existing manufacturing process. It also contributes to producing the V-belt 1. Further, since the pressure sensor 16 is in the form of a film, it is suitable for detecting the pressure in the thickness direction of the pressure sensor 16.

The pressure sensor 16 is thin as described above, and is stacked at the center in the width direction on the back side of the compression layer 12 and integrated as a part of the V-belt 1.

Here, "the sensor is integrated with the belt" means, in a broad sense, (A) appearance integrally with (A) in order to differentiate it from the method of externally attaching a commercially available sensor to the belt or simply burying it. And (B) the belt provided with the sensor is provided with strength, elasticity, durability and the like which secures the function as a transmission belt. Furthermore, in a narrow sense, in addition to the above (A) and (B), the component (C) of the sensor (for example, the piezoelectric layer + electrodes (both sides)) and the laminate (for example, the rubber composition in the laminate) From the viewpoint of the bonding state of the interface (boundary) with the part (containing a substance), the interface is bonded by chemical bonding or physical bonding. For example, when the sensor is a pressure sensor and the electrode layer is a metal, the above-described surface treatment may be performed because it is not bonded to the surrounding rubber layer (the part including the rubber composition in the laminate) as it is It is preferable (it is preferable to satisfy the condition of the above (C)).

Therefore, the pressure sensor 16 is not only disposed at the widthwise center (position A) on the back side of the compression layer 12 as shown in FIG. It may be disposed at the center (position B). Further, the pressure sensor 16 is provided on both side surfaces of the compression layer 12, that is, on the friction transmission surface side (position C) where the V-belt 1 contacts the inner wall surface of the V groove provided in the drive pulley 2 and the driven pulley 3. It may be arranged. When the pressure sensor 16 is disposed on the side of the compression layer 12 (position C), the pressure sensor 16 may be disposed on only one side. Further, the pressure sensor 16 may be disposed in the upper canvas 14 in a woven state (position D) or may be disposed in the lower canvas 15 (position E). The pressure sensor 16 may be disposed at the center in the width direction (position J) of the inner surface side of the compression layer 12.

As described above, when the pressure sensor 16 is disposed at the position A, various pressures applied to the entire V-belt 1 such as the pressure applied from the inner surface side of the V-belt 1 and the pressure applied from the back surface are detected without deviation. It is suitable for observation. Further, when the pressure sensor 16 is disposed at the position B, as shown in FIG. 4, the back surface of the V-belt 1 in a state where the V-belt 1 is fitted in the V groove provided in the drive pulley 2 and the driven pulley 3 It is suitable for detecting and observing the pressure generated as a side deflection. Further, when the pressure sensor 16 is disposed at the position J, as shown in FIG. 4, the inner surface of the V-belt 1 in a state where the V-belt 1 is fitted in the V groove provided in the drive pulley 2 and the driven pulley 3. It is suitable for detecting and observing the pressure generated as a side deflection. When the pressure sensor 16 is disposed at the position C, the pressure sensor 16 is suitable for detecting and observing the pressure when the traveling V-belt 1 contacts the driving pulley 2 and the driven pulley 3. When the pressure sensor 16 is disposed on both side surfaces of the compression layer 12, it contributes to the straight running of the V-belt 1. Further, when the pressure sensor 16 is disposed at the position D, as in the position B, the pressure sensor 16 is suitable for detecting and observing the pressure generated as the deflection on the back side of the V-belt 1. Further, when the pressure sensor 16 is disposed at the position E, as shown in FIG. 4, it is suitable for detecting and observing the pressure generated as the deflection on the inner surface side of the V-belt 1.

In the present embodiment, the film-like piezoelectric layer 163 containing an organic polymer is used as the pressure sensor 16, but piezoelectric powder is dispersed in the rubber composition constituting the extension layer 11 or the compression layer 12. Alternatively, the piezoelectric layer 163 may be formed, and the electrode layers 161 and 162 may be disposed on both sides thereof.

For example, as shown in FIG. 8, the piezoelectric layer 163 in which the piezoelectric powder is dispersed in the rubber composition constituting the compression layer 12 is disposed in a part of the compression layer 12. The pressure sensor 16 may be configured by sandwiching the electrode layers 161 and 162 on a part of the upper surface and the lower surface.

Further, as shown in FIG. 9, as a piezoelectric layer 163 in which the whole of the compressed layer 12 is formed of a rubber composition in which piezoelectric powder is dispersed, the upper and lower electrodes are formed at desired positions of the piezoelectric layer 163 2 A sheet of

electrode layers

161 and 162 may be embedded. In this case, the two

electrode layers

161 and 162 and a part of the piezoelectric layer 163 sandwiched between the two

electrode layers

161 and 162 constitute the pressure sensor 16 and function as a pressure sensor.

In the case of the above embodiment, the pressure sensor 16 can be integrated with the V-belt 1 by dispersing and incorporating the piezoelectric powder in the rubber composition constituting the compression layer 12 at the manufacturing stage. In addition, since it is sufficient to add the process of mixing the piezoelectric powder to the rubber composition constituting the laminate 10 in the manufacturing process, the V-belt 1 can be efficiently manufactured while utilizing the existing manufacturing process. It also contributes. Further, since the function as a piezoelectric body can be provided only by dispersing the piezoelectric powder in the rubber composition constituting the laminate 10, a desired portion of the V-belt 1 can be made to function as the pressure sensor 16 it can.

In the above embodiment, when a metal net is used as the electrode layers 161 and 162, the metal net and the rubber layer have an anchor effect in addition to the crosslinking reaction (chemical bonding) between the pressure sensor 16 and the surrounding rubber in the vulcanization step. Since the entire compression layer 12 is integrated by bonding (physical connection), the pressure sensor 16 and the V-belt 1 can be easily integrated.

Alternatively, the piezoelectric powder may be held on the upper canvas 14 or the lower canvas 15 to form the piezoelectric layer 163, and the electrode layers 161 and 162 may be disposed on both sides thereof. In this case, a method of incorporating piezoelectric powder in warps or wefts constituting the upper canvas 14 or the lower canvas 15 in advance, a method of incorporating piezoelectric powder in an adhesion process, and the like can be mentioned.

Examples of piezoelectric powder include barium titanate, quartz crystal, lead zirconate titanate, lithium niobate, lithium tantalate, potassium sodium tartrate, and zinc oxide. The shape of the piezoelectric powder may be in the form of flakes or needles.

(Transmitter 17)
In the present embodiment, the transmitter 17 is a thin circuit electrically connected to the pressure sensor 16 as shown in FIGS. 2 and 3, and one end side of the stretch layer 11 in the width direction of the V-belt 1. Is located in The transmitter 17 spontaneously receives pressure data (corresponding to the state information of the V-belt 1) detected and observed by the pressure sensor 16 at a predetermined cycle spontaneously by a battery (not shown), the external receiver 4 (described later) Send to).

The transmitter 17 is preferably disposed at the center in the width direction of the V-belt 1 of the stretch layer 11. In this case, it contributes to the straight running of the V-belt 1. Also, the transmitter 17 may be disposed at the center in the width direction of the V-belt 1 of the compression layer 12. Also, the transmitter 17 may be disposed on the upper portion of the upper canvas 14 (the back surface of the V-belt 1). In this case, it is desirable to cover the transmitter 17 with a protective canvas so that the appearance is not lost.

Further, in the present embodiment, a battery is described as an example of the driving power supply of the pressure sensor 16 and the transmitter 17. However, a wireless power feeding system or wireless power generation where wireless power is transmitted from the outside is used. You may employ the kinetic type etc. which are generated.

As described above, since the transmitter 17 is integrated with the V-belt 1 by embedding the transmitter 17 in the stretch layer 11 of the V-belt 1, the function can be achieved without losing the appearance. . Further, since the stretch layer 11 of the V-belt 1 is a place where direct pressure is less likely to be applied as compared with the compression layer 12, it is possible to avoid an excessive load on the transmitter 17 as an electronic device.

According to the V-belt 1 described above, the pressure sensor 16 for detecting the pressure applied to the V-belt 1 is integrated as a part of the laminate 10, so that the pressure applied to the V-belt 1 can be detected and observed. . Then, it is possible to grasp the degree of deterioration and damage of the V-belt 1 and abnormalities of the drive pulley 2 and the driven pulley 3 etc. around which the V-belt 1 is wound, by the value of the detected and observed pressure. Thereby, the state of the V-belt 1 can be accurately grasped and the replacement time can be determined. Further, since the pressure sensor 16 is integrated with the V-belt 1, strength, elasticity, durability, and the like can be provided to secure the function as a transmission belt for transmitting power without impairing the appearance.

(V-belt 1 pressure data acquisition system)
In this embodiment, as shown in FIG. 1, the pressure applied to the V-belt 1 is detected using the V-belt 1 wound around the drive pulley 2 and the driven pulley 3 and the receiver 4. It is possible to realize an acquisition system 100 (corresponding to a transmission belt state information acquisition system) of pressure data (state information) of the V-belt 1 that can be observed.

The receiver 4 may be, for example, a portable tablet or the like, and after receiving pressure data transmitted from the transmitter 17 provided in the V-belt 1, storage, analysis, and display of analysis results can be performed by program control. It is a structure.

The receiver 4 may be configured to have only the receiving function portion, and may be installed on the drive pulley 2, the driven pulley 3, or an object (peripheral device, cover, etc.) disposed around the V-belt 1. In this case, after the receiver 4 is connected to a personal computer or the like and the pressure data transmitted from the transmitter 17 is received, storage, analysis, and display of analysis results are performed under program control of the personal computer.

For example, in analysis by program control, not only the pressure value of the V-belt 1 is output, but also the pressure data (value) detected and observed by the pressure sensor 16 and transmitted from the transmitter 17 are analyzed in advance The degree of deterioration of the V-belt 1 is analyzed by comparing it with the data (value) of the reference pressure obtained as a result, and the presence or absence of replacement of the V-belt 1, the replacement time, and other abnormalities It can be displayed on the display screen of the personal computer.

Further, in the analysis by program control, in the V-belt 1 wound between the drive pulley 2 and the driven pulley 3, the pressure applied at the timing when the running V-belt 1 contacts the drive pulley 2 is a predetermined interval. To calculate the traveling speed of the V-belt 1 by dividing the predetermined interval (distance) by the time difference (time) detected by the two pressure sensors 16. be able to. Furthermore, the slip ratio of the V-belt 1 can also be calculated from the difference between the calculated traveling speed of the V-belt 1 and the rotational speed of the drive pulley 2 measured separately.

Further, in analysis by program control, the internal temperature of the V-belt 1 corresponding to pressure data (value) obtained by analyzing measured data in advance from pressure data (value) detected and observed by the pressure sensor 16 It is also possible to estimate the current internal temperature of the V-belt 1 by referring to the reference data.

If the pressure data acquisition system 100 of the V-belt 1 is used, the V detected by the pressure sensor 16 can be obtained by disposing or bringing the receiver 4 away from the V-belt 1 provided with the transmitter 17 to a certain distance. The pressure data of the belt 1 can be received. As a result, the pressure data of the V-belt 1 can be acquired from a location at a certain distance from the V-belt 1 traveling at high speed between the drive pulley 2 and the driven pulley 3.

(Other embodiments)
Although the V-belt 1 has been described in the above embodiment, the sensor 216 may be employed for the V-ribbed belt 201 shown in FIG. The V-ribbed belt 201 is made of a rubber composition, and includes a stretch layer 211 (back layer) and a compression layer 212 (inner layer) having three ribs 214 extending in parallel along the circumferential direction of the V-ribbed belt 201. And a core wire 213 (core wire layer) embedded along the circumferential direction of the V-ribbed belt 201 between the extension layer 211 and the compression layer 212. And the sensor 216 is arrange | positioned, for example as shown in FIG. 6 in the width direction center (position F) of the back side of the compression layer 212. As shown in FIG. In addition, the sensor 216 is disposed on one side of the rib 214, that is, on the friction transmission surface side (position G) where the V-ribbed belt 201 contacts the inner wall surface of the groove provided in the drive pulley 2 and the driven pulley 3. It is also good.

Further, the sensor 316 may be employed for the toothed belt 301 shown in FIG. The toothed belt 301 has a plurality of teeth 302 (inner layer) provided at predetermined intervals in the circumferential direction of the toothed belt 301, and a back 304 (rear layer) in which the core wire 303 (core layer) is embedded. And a tooth cloth 306 that covers the surfaces of the plurality of teeth 302. The sensor 316 is, for example, as shown in FIG. 7, a front portion (position H) of the tooth portion 302, that is, a surface where the toothed belt 301 contacts the tooth portion provided on the drive pulley 2 and the driven pulley 3. Placed on the side.

Further, although the pressure sensor 16 is disposed in the stretch layer 11 or the compression layer 12 in the above embodiment, the pressure sensor 16 may be disposed between the upper canvas 14 and the stretch layer 11, The pressure sensor 16 may be disposed between the layer 11 and the core layer 13, or the pressure sensor 16 may be disposed between the core layer 13 and the compression layer 12. A pressure sensor 16 may be disposed between the canvas 15 and the canvas 15.

If the thickness is thin (9 mm) type V-belt 1 (including transmission belts such as V-ribbed belt 201 and toothed belt 301), the electrode layer 161 is disposed on the back side of the stretching layer 11, and the compression layer 12 is formed. The electrode layer 162 is disposed on the inner surface side of the piezoelectric layer, and the piezoelectric powder is dispersed in the rubber composition constituting the stretch layer 11, the core layer 13 and the compression layer 12 stacked between the electrode layer 161 and the electrode layer 162. By forming the piezoelectric layer 163, the entire V-belt 1 may function as a pressure sensor.

Moreover, although the sensor demonstrated by the said embodiment was a pressure sensor, as a sensor integrated with V belt 1, a temperature sensor may be sufficient. If the V-belt 1 continues to be used under various external pressure and internal pressure applied to the V-belt 1, the internal temperature of the V-belt 1 rises due to the increase of the internal temperature due to the pressure and the influence of frictional heat. Therefore, by integrating the temperature sensor into the V-belt 1, deterioration and damage of the V-belt 1 can be grasped by detecting and observing the internal temperature of the V-belt 1 (the state of the V-belt 1).

Next, a toothed belt (transmission belt) provided with a pressure sensor according to the example was manufactured, and a running test and a sensing test were performed.

The structure, material, and the like of the toothed belt according to the embodiment will be described below. FIG. 10 is a cross-sectional view of the center in the belt width direction of the toothed belt according to the embodiment.

(Configuration of toothed belt)
Toothed belt: 124 teeth, tooth type MY, tooth pitch 8 mm
Belt width: 19 mm
Belt circumference: 992 mm
The pressure sensor is installed at the center in the belt width direction, 1 mm on the tooth side (inner side) from the core line (see Fig. 10)
Pressure sensor size: 1 mm (belt width direction length) x 1 mm (belt circumferential length) x 0.05 mm (thickness)

(Configuration of pressure sensor)
Base material: PET film whose surface is plasma treated Piezoelectric layer: Thin film of "copolymer of vinylidene fluoride and trifluoroethylene" (thickness 1 μm)
Electrode layer: Aluminum deposited film (thickness 0.1 μm)

(Method of manufacturing pressure sensor)
An aluminum film to be an electrode layer is formed by vapor deposition on the non-plasma-treated side of a substrate (a PET film whose surface has been plasma-treated), and then a piezoelectric layer is formed by spin coating. A thin film of "copolymer of ethylene" was laminated. Furthermore, the laminated body obtained by laminating | stacking sequentially the aluminum film used as an electrode layer by vapor deposition, and the same PET film as a base material was used as a pressure sensor.

(Material of toothed belt)
Table 1 shows the composition of the rubber composition used in the back layer (back) and the inner layer (tooth portion) of the toothed belt.
[Rubber composition constituting back layer (back) and inner surface layer (tooth portion)]

Tooth cloth
A canvas (made by Asahi Kasei Co., Ltd.) having the following configuration was used as a tooth cloth (corresponding to a lower canvas).
・ Composition Weft: 66 nylon + urethane yarn, warp: 66 nylon • yarn construction Weft: 465 dtex, warp: 155 dtex
-Density Weft: 80 threads / 3 cm, warp: 150 threads / 3 cm
・ Weave composition Twill weave ・ Thickness 0.85 mm
The rubber composition formulated as shown in Table 1 was dissolved in methyl ethyl ketone to prepare a rubber paste, and the rubber paste was impregnated with canvas. Furthermore, a laminate (a canvas with rubber) in which the above-mentioned canvas impregnated with rubber paste and the rubber sheet (sheet thickness: 2.0 mm) of the rubber composition of the formulation shown in Table 1 was used as a tooth cloth .

[Heart]
The cord uses a cord obtained by adhering a twisted cord made of glass fiber (raw thread: ECG 150, strand configuration: 3/11, core diameter: 1.20 mm) in the order of RFL solution and the above-mentioned rubber paste. .

(Method of manufacturing toothed belt)
A rubber-coated canvas serving as a tooth cloth, and an unvulcanized rubber sheet serving as a tooth portion (a rubber composition shown in Table 1 is kneaded and rolled to a thickness of 2.35 mm obtained by rolling the mold in which a tooth mold is engraved) The sheets of the above were laminated in order and pressed under conditions of 120.degree. C., 160 seconds and pressing pressure: 4.51 MPa (surface pressure) to prepare a semi-vulcanized preformed body (formed body of tooth portion).
Next, the preform was mounted on the outer periphery of a cylindrical mold having a tooth mold engraved on the outer periphery, and a pressure sensor was fitted in a predetermined place of the preform. Next, a twisted cord to be a core is spirally spun at a predetermined interval on the outer periphery thereof, and an unvulcanized rubber sheet to be a spine on the outer periphery (kneaded and rolled with a rubber composition shown in Table 1) The unvulcanized laminate was produced by winding the obtained 2.0 mm thick sheet).
Next, the unvulcanized laminate is placed in a vulcanizer and vulcanized under conditions of a temperature of 179 ° C., a time of 40 minutes, and a vapor pressure of 0.83 MPa, whereby the laminate is integrated and toothed The vulcanized sleeve of the belt was obtained.
The resulting sleeve was then cut to a width of 19 mm to obtain a toothed belt in which the pressure sensor was integrated as part of the belt.
In addition, the power supply, the signal processing circuit, and the wireless transmission circuit which make a pressure sensor function were fixed to the back of a toothed belt (not shown).

(Moving test of a toothed belt)
The durability was confirmed by a running test using the toothed belt according to the obtained example. As a comparative example, a toothed belt in which the pressure sensor is not disposed (the same configuration as the toothed belt in the example except that the pressure sensor is not disposed) was also tested.
As a running test device, as shown in FIG. 11, a toothed belt is bridged over a 21-tooth drive pulley (Dr) and a 42-tooth driven pulley (Dn), and the diameter 52 mmφ that can contact the back (rear) A test device equipped with a tension pulley (Ten) was used. A running test was performed for 1500 hours under the conditions of an ambient temperature of 120 ° C., a load of 3.68 kW, an initial tension of 147 N, and a driving side rotation speed of 7200 rpm.
Even in the toothed belt of the embodiment in which the pressure sensor is disposed and in the toothed belt of the comparative example in which the pressure sensor is not disposed, 1500 hours were completed without causing a problem such as a practical failure phenomenon.

(Sensing test of toothed belt)
With the above running test device, the sensing performance (pressure sensor function) of the toothed belt of the example was confirmed in the layout without the tension pulley (Ten).
A pressure sensor is disposed at the above position, and a signal processing circuit and a wireless transmission circuit disposed on the back of the toothed belt transmit a signal from the pressure sensor, and the signal received by the receiver is shown in FIG. Shown in B).
(A) and (B) of FIG. 12 show the change of the signal when a toothed belt passes a pulley (the scale of (A) and (B) of FIG. 12 is the same).

The signal from the pressure sensor is sampled every 30 ms, data for 3 times is packed, and transmitted by 2.4 GHz Zigbee communication. (A) and (B) of FIG. 12 show signals received by the reception dongle connected to the USB port of the PC, and are graphs of serial data from the port.
(A) of FIG. 12 shows a signal when the toothed belt travels under normal tension, and (B) of FIG. 12 shows that the tension of the toothed belt is greater than that of (A) of FIG. Is a signal when traveling in a low condition. As can be seen from (A) and (B) in FIG. 12, it can be understood that the belt tension is lowered by the strength of the signal (the magnitude in the vertical direction of the signal). This indicates that by monitoring the signal strength, it is possible to detect that the toothed belt has deteriorated due to wear or the like.

While the invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
The present application relates to Japanese Patent Application No. 2017-242968 filed on Dec. 19, 2017, Japanese Patent Application No. 2017-243510 filed on Dec. 20, 2017, and Japanese Patent Application No. 2018-232408 filed on Dec. 12, 2018. The contents of which are incorporated herein by reference.

1 V belt (transmission belt)
Reference Signs List 2 drive pulley 3 driven pulley 4 receiver 10 laminate 11 extension layer 12 compression layer 13 core layer 131 core line 14 upper canvas 15 lower canvas 16 pressure sensor 161 · 162 electrode layer 163 piezoelectric layer 17 transmitter 100 V belt Pressure data acquisition system

Claims

A laminate including a back layer disposed on the back side, an inner layer disposed on the inner side, and a core layer having a core embedded between the back layer and the inner layer. A power transmission belt,
A transmission belt, wherein the transmission belt has a sensor for detecting a state of the transmission belt as at least a part of the laminated body.
The transmission belt according to claim 1, wherein the sensor is integrated as at least a part of the stack.
The transmission belt according to claim 1, wherein the sensor is disposed on the back side of the inner surface layer and at the center in the width direction of the transmission belt.
The transmission belt according to claim 1, wherein the sensor is disposed on the back side of the back layer and at the center in the width direction of the transmission belt.
The transmission belt according to claim 1, wherein the sensor is disposed on a side of the inner surface layer in contact with a pulley on which the transmission belt is wound.
The transmission according to any one of claims 1 to 5, wherein the transmission belt includes a plurality of the sensors, and the plurality of sensors are disposed at predetermined intervals in a circumferential direction of the transmission belt. belt.
The laminate comprises an outer fabric layer on at least a part of the outer periphery,
The transmission belt according to claim 1, wherein the sensor is included in at least a part of the outer fabric layer.
The transmission belt further includes a transmission unit that transmits state information of the transmission belt detected by the sensor to the outside.
The transmission belt according to any one of claims 1 to 7, wherein the transmission unit is embedded in the back surface layer or the inner surface layer.
The transmission belt according to any one of claims 1 to 8, wherein the sensor is a pressure sensor that detects a state of pressure applied to the transmission belt.
The power transmission belt according to claim 9, wherein the pressure sensor is a film-like piezoelectric material containing an organic polymer, in which a pair of electrodes are formed on both sides.
The transmission belt according to claim 9, wherein the pressure sensor has a configuration in which a pair of electrodes is disposed on both sides of a piezoelectric body in which piezoelectric powder is dispersed in a rubber composition.
A laminate comprising a back layer disposed on the back side, an inner layer disposed on the inner side, and a core layer having a core embedded between the back layer and the inner layer;
A sensor provided on at least a part of the laminate for detecting the state of the transmission belt;
A transmission unit including a transmitter embedded in the back layer or the inner layer and transmitting to the outside the state information of the transmission belt detected by the sensor;
And a receiver for receiving the transmission belt status information transmitted from the transmission unit;
A transmission belt status information acquisition system.