JP2010254044A - Tire, and assembly of tire and rim - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire and an assembly of a tire and a rim capable of easily performing attachment/detachment of various radio tag devices having various shapes while suppressing cavity resonance and enhancing adhesion property of the radio tag device. <P>SOLUTION: The tire 1 or the assembly of the tire 1 and the rim R includes: a sound absorption layer 11 comprising a non-woven fabric and stuck to a tire inner surface; and the radio tag device 13 mounted onto the sound absorption layer 11. The radio tag device 13 is detachably mounted to the sound absorption layer 11 by a hook-and-loop fastener. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a tire and a tire-rim assembly comprising a nonwoven fabric and comprising a sound absorbing layer and a wireless tag device, and in particular, while suppressing cavity resonance of the tire and facilitating attachment / detachment of the wireless tag device. This also improves the adhesiveness of the wireless tag device.

  In the tire assembled on the rim and attached to the vehicle, the tread portion oscillates against the road surface unevenness while the vehicle is running, so that the gas filled in the tire cavity resonates. This cavity resonance is a main cause of so-called road noise, and many of the resonance frequencies exist in the range of 180 to 300 Hz. When the road noise is transmitted to the vehicle interior, unlike a noise in other frequency bands, it takes a sharp and high peak value, which is annoying noise for passengers in the vehicle interior.

  In order to suppress such cavity resonance and reduce road noise, Patent Document 1 discloses that a tire has a sound absorbing layer for sound damping made of a nonwoven fabric in a tire lumen formed by a rim and a tire attached to the rim. Tires fixed inside are proposed.

  Patent Document 2 discloses a tire in which a wireless tag device is further attached to a tire having a sound absorbing layer. The wireless tag device has a sensor that detects the internal state of the tire, such as the internal pressure and temperature, and a recording unit for identifying tire identification information. To be transmitted to. In addition, the tire which provides only a wireless tag apparatus on the tire inner surface is disclosed by patent documents 3-6, for example. The wireless tag device is well known in the RFID (Radio Frequency Identification) technology. For example, a tag device in which a semiconductor in which product information is recorded and a small antenna are embedded is attached to an object, and wireless communication is used to By reading the information with a dedicated reader, traffic management, product management, and authentication are possible. In addition, since the RFID tag device is non-contact type, there is no worry about wear at the contacts, etc., and since no battery is used, it is easy to perform any processing adapted to the application example, and to make it thinner and smaller. is there. For these reasons, RFID tags using RFID technology are used in a wide range of fields, such as access control in buildings, air baggage tracking systems, traffic control systems, automobile anti-theft systems, and library collection management in libraries. The field of use is expected to expand in the future.

Japanese Patent No. 3384633 JP 2007-176403 A JP-A-11-42915 JP-A-9-136517 JP 2002-502765 A

  Patent Document 2 discloses a tire in which a wireless tag device is fixed to a sound absorbing layer made of a sponge material with an adhesive, and a tire in which a slit-like hole is provided in the sound absorbing layer made of a sponge material and the wireless tag device is press-fitted into the hole. Is disclosed. In the former tire in which the wireless tag device is fixed to the sound absorbing layer with an adhesive, it is difficult to attach and detach the wireless tag device, and it cannot be replaced even if the wireless tag device fails. On the other hand, in the latter tire in which a slit-like hole is provided in a sound-absorbing layer made of a sponge and the RFID tag device is press-fitted into the hole, the sound-absorbing layer having a sound-absorbing effect can be replaced if the RFID tag device fails. Therefore, the size of the slit is restricted, and the size of the wireless tag device that can be disposed is also limited. Patent Document 3 describes that a tire including a wireless tag device can be obtained through a manufacturing process in which a wireless tag device is attached to a tire member on a forming drum and the tire member is expanded in diameter. However, there is a possibility that the RFID tag device cannot follow the deformation during the diameter expansion deformation and may be damaged. Further, Patent Documents 4 and 5 describe tires in which an RFID tag device is directly attached to the inner surface of the tire using an adhesive and / or a fastener. However, these tires are posterior to existing tires. From the viewpoint of using the RFID tag device for a long period of time, the adhesion of the RFID tag device to the inner surface of the tire can be made stronger and its durability can be improved. It is sought after. The same applies to the antenna often included in the RFID tag device, and it is desired to improve the durability by making the adhesiveness to the inner surface of the tire firm.

  Accordingly, an object of the present invention is to solve these problems, and the object of the present invention is to easily attach and detach various wireless tag devices having various shapes on the premise of suppressing cavity resonance. Another object of the present invention is to provide a tire and an assembly of a tire and a rim with improved adhesion of the RFID tag device.

  In order to achieve the above object, a first invention is a tire comprising a sound absorbing layer made of a non-woven fabric and attached to the inner surface of the tire, and a wireless tag device attached on the sound absorbing layer, and the wireless tag The device is a tire characterized in that it is detachably attached to the sound absorbing layer with a hook-and-loop fastener.

  In the tire according to the first aspect of the invention, the wireless tag device preferably includes a wireless tag main body and an antenna, and at least a part of the antenna is embedded and fixed to the sound absorbing layer.

  Furthermore, in the tire of the first invention, it is preferable that the sound absorbing layer and the RFID tag device are provided on the inner surface of the tread portion.

  Furthermore, in the tire according to the first aspect of the invention, the sound absorbing layer is preferably composed of a nonwoven fabric formed by bonding fibers. At this time, the fibers are preferably bonded by heat welding. Alternatively, the fibers are preferably bonded by an adhesive. Such an adhesive is preferably an emulsion resin adhesive, a natural rubber latex adhesive, a synthetic rubber latex adhesive or a water-soluble resin aqueous adhesive.

  Alternatively, in order to achieve the above object, the second invention is an assembly of a tire and a rim made of a non-woven fabric, comprising a sound absorbing layer affixed on the rim, and a wireless tag device attached on the sound absorbing layer. The wireless tag device is a tire and rim assembly characterized in that it is detachably attached to the sound absorbing layer by a surface fastener.

  In the tire and rim assembly according to the second aspect of the present invention, it is preferable that the wireless tag device includes a wireless tag main body and an antenna, and at least a part of the antenna is embedded and fixed to the sound absorbing layer.

  Furthermore, in the tire according to the second aspect of the invention, the sound absorbing layer is preferably composed of a nonwoven fabric formed by bonding fibers. At this time, the fibers are preferably bonded by heat welding. Alternatively, the fibers are preferably bonded by an adhesive. Such an adhesive is preferably an emulsion resin adhesive, a natural rubber latex adhesive, a synthetic rubber latex adhesive or a water-soluble resin aqueous adhesive.

  According to this invention, it is easy to attach and detach various wireless tag devices having various shapes while suppressing cavity resonance by optimizing the attaching means for the sound absorbing layer of the wireless tag device, and It is possible to provide a tire and an assembly of a tire and a rim with improved adhesion of the wireless tag device.

1 is a cross-sectional view in the tire width direction of an assembly of a tire and a rim in which the tire according to the present invention is mounted on a rim. FIG. 2 is a partial perspective view of a sound absorbing layer and a wireless tag device in the tire shown in FIG. 1. FIG. 5 is a cross-sectional view in the tire width direction of a tire and rim assembly in which another tire according to the present invention is mounted on a rim. 1 is a sectional view in the tire width direction of an assembly of a tire and a rim according to the present invention. It is a fragmentary perspective view of a sound absorption layer and a wireless tag in other tires according to the present invention.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view in the tire width direction of an assembly of a tire and a rim R formed by mounting a typical pneumatic tire (hereinafter referred to as “tire”) according to the present invention on the rim R. FIG. 2 is a partial perspective view of the sound absorbing layer and the RFID tag device of the tire shown in FIG. FIG. 3 is a sectional view in the tire width direction of an assembly of a tire and a rim in which another tire according to the present invention is mounted on the rim. FIG. 4 is a sectional view in the tire width direction of the tire and rim assembly according to the present invention. FIG. 5 is a partial perspective view of a sound absorbing layer and a wireless tag of another tire according to the present invention. Hereinafter, the present invention will be described assuming that TPMS is used as a wireless tag device. However, it should be noted that the present invention can also be applied to a case where a wireless tag device such as an identification tag or a temperature sensor is attached.

  As shown in FIG. 1, the tire 1 of the present invention includes a tread portion 2 that comes in contact with the road surface, a pair of sidewall portions 3 and 3 that extend inward in the tire radial direction from both side portions of the tread portion 2, as shown in FIG. A pair of bead portions 4, 4 that are provided on the inner side in the tire radial direction of the respective sidewall portions 3, 3 and are fitted to the rim R constitute a tire main body portion 5. Inside the tire main body 5, a carcass 7 having a radial structure, for example, which extends in a toroidal shape between the bead cores 6 and 6 embedded in the bead parts 4 and 4 and forms the skeleton structure of the tire main body 5, and the carcass 7 is disposed on the outer peripheral side of the crown region, and a belt 8 that reinforces the tread portion 2 is disposed. An air-impermeable inner liner 10 is disposed on the inner surface side of the tire body 5, that is, the side facing the tire lumen 9 defined by the tire 1 and the rim R.

  Moreover, as shown in FIGS. 1 and 2, a sound absorbing layer 11 made of a nonwoven fabric is attached via an adhesive layer 12 on the inner liner 10 inside the tread portion. Thereby, the vibration energy of the filling gas accompanying the cavity resonance generated in the tire lumen 9 is converted into the internal vibration energy in the holes of the sound absorbing layer 11 and consumed as heat energy, thereby reducing the cavity resonance noise. Further, a TPMS (Tire Pressure Monitoring System) 14 that is a wireless tag device 13 that monitors a decrease in the internal pressure of the tire 1 is attached on the sound absorbing layer. The TPMS 14 has a hook surface 15 raised in a hook shape, and the hook surface and the loop surface 16 raised in a loop shape of the sound absorbing layer 11 are pressed against each other, so that both are hook-and-loop fasteners. Thus, the TPMS 14 is mounted on the sound absorbing layer 11. The “filling gas” referred to here refers to what is generally filled in a tire, such as an inert gas such as air or nitrogen gas.

By adopting the above configuration and attaching the sound absorbing layer 11 and the TPMS 14 with a hook-and-loop fastener, the TPMS 14 is detachably attached. Moreover, since it is both surface fastener, attachment strength is fully ensured and it becomes possible to suppress peeling and dropping-off of TPMS14. Furthermore, since the sound absorbing layer 11 has cushioning properties, the sound absorbing layer 11 absorbs deformation of the tread portion at the time of tire load rolling, and the deformation of the TPMS 14 is suppressed, so that it is possible to prevent damage to the TPMS 14. It becomes. Furthermore, since the TPMS 14 is not directly attached to the inner surface of the tire, even if the tread portion 2 generates heat at the same time when the tire is loaded, the heat is not directly transmitted to the TPMS 14, and the TPMS 14 accumulates excessively to cause damage. It becomes possible to suppress. In addition, although different from the illustrated example, from the viewpoint of further suppressing heat storage and improving the durability of the TPMS 14, the sound absorbing layer 11 and the TPMS 14 are on the outer side in the tire width direction from the belt end and in the tire more than the tire maximum width. It is preferable to arrange in the width direction inside.
The above-described TPMS 14 is a direct TPMS 14 and is a device that directly measures the internal pressure of the tire 1 and notifies the driver when the internal pressure has decreased. Of course, an indirect TPMS can be used instead of the direct TPMS 14 described above. Indirect TPMS is a device that uses a wheel speed sensor for ABS to detect a change in tire radius by reducing pressure as a difference in the number of revolutions and informs the driver of a decrease in internal pressure. However, direct TPMS that can measure the internal pressure more directly and accurately is expected to dominate the TPMS market in the future. As specific usage methods, when the internal pressure of any one of the four wheels becomes small, the driver is notified by a lamp, etc., which tire is decompressed, and displayed along with the position. It is assumed that the pressure is displayed numerically.

  The above-mentioned hook-and-loop fastener is a type in which the hook surface 15 of the TPMS 14 and the loop surface 16 of the sound absorbing layer 11 are pressed against each other, but in addition, the hook and loop are implanted in both the TPMS 14 and the sound absorbing layer 11. Or a click type that is brushed in a mushroom shape and has a strong binding force. A saw-toothed shark bite type or various types of variations are assumed.

  Further, the sound absorbing layer 11 and the TPMS 14 can be disposed not only on the inner surface of the tread portion 2 as shown in FIG. 1 but also on the inner surface of the sidewall portion 3 as shown in FIG. Moreover, as shown in FIG. 4, it can also distribute | arrange on the rim | limb R. FIG. From the viewpoint of improving the adhesion of the TPMS 14 to the sound absorbing layer 11, it is preferable to arrange the sound absorbing layer 11 and the TPMS 14 on the inner surface of the tread portion 2 as shown in FIG. This is because a centrifugal force is applied to the TPMS 14 during rolling of the tire load, and the TPMS 14 is pressed against the sound absorbing layer 11 using the force, so that the adhesion of the TPMS 14 is improved. On the other hand, as shown in FIG. 4, when the sound absorbing layer 11 and the TPMS 14 are arranged on the rim R, the adhesiveness of the TPMS 14 is reduced due to centrifugal force, but the TPMS 14 is separated from the tread portion 2 that is a heat source. It is preferable from the viewpoint of heat storage.

  Furthermore, as shown in FIG. 5, the TPMS 14 (wireless tag device 13) often includes a TPMS body 17 (wireless tag body) and an antenna 18. In this case, it is preferable to embed and fix at least a part of the antenna 18 in the sound absorbing layer 11. This is because, by adopting the above configuration, the sound absorbing layer 11 has a cushioning property while the antenna 18 is fixed, so that deformation of the antenna 18 at the time of tire load rolling is suppressed and damage to the antenna 18 is prevented. Because it becomes possible.

  Furthermore, the sound absorbing layer 11 is preferably composed of a nonwoven fabric formed by bonding fibers. Compared to the case where a nonwoven fabric in which fibers are bonded has a nonwoven fabric in which fibers are not bonded, the compressive rigidity in the thickness direction of the nonwoven fabric is improved, and the nonwoven fabric deteriorates and changes over time, Even if a centrifugal force is applied to the nonwoven fabric when the tire 1 rotates and the external force changes, the nonwoven fabric is not excessively deformed, and the distance between the fibers constituting the nonwoven fabric is not too small. For these reasons, it is possible to sufficiently secure the volume of the region where the sound absorption effect described above is ensured and to suppress the generation of road noise without reducing the sound absorption effect. Furthermore, since the fibers are bonded, each fiber is less likely to come off compared to a non-woven fabric that is not bonded to each other, and the fibers constituting the nonwoven fabric are prevented from falling off when rolling the tire. can do.

  The fibers are preferably bonded by heat welding. Alternatively, the fibers are preferably bonded by an adhesive. As a method for bringing the fibers into a heat-welded state, there is a thermal bonding method in which the knitted fibers are melted by heat to bond the fibers. Specifically, the thermal bonding method is a method in which the entire fiber is made of a thermoplastic resin, and the fiber itself is heated and melted to directly bond the contacted portions between the fibers, or the melting point is lower than that of the fiber. There is a method of indirectly bonding fibers by melting a thermoplastic resin and applying between the fibers. In addition, the chemical bonding method in which fibers are bonded by applying an adhesive includes an emulsion resin adhesive, a natural rubber latex adhesive, a synthetic rubber latex adhesive, and a water-soluble resin aqueous adhesive. Specifically, an epoxy resin, a low melting point polyethylene terephthalate (PET), or the like can be used. In addition to the above-mentioned bonding method, it is also possible to combine the above-mentioned bonding method with a needle punch method in which a staple is inserted into a nonwoven fabric and mechanically bonded to the fiber, or a spunlace method in which fibers are entangled using high-pressure water flow. It is.

The sound absorbing layer 11 can be composed of a nonwoven fabric made of synthetic fiber, plant fiber, or animal fiber. The nonwoven fabric is obtained by intertwining organic fibers such as PET, rayon or aramid, inorganic fibers such as glass or carbon, animal-derived fibers, plant-derived fibers, and the like. Further, the length of the fiber can be arbitrarily set. The hook surface 15 and the loop surface 16 can be made of the same material as that of the nonwoven fabric. In addition, from the viewpoint of optimizing the sound absorbing layer 11 and improving the quietness, the density of the fibers of the nonwoven fabric constituting the sound absorbing layer 11 is in the range of 5 to 60 kg / m ³ and the fiber diameter is in the range of 5 to 50 μm. The ratio of the volume of the nonwoven fabric to the volume inside the tire is preferably in the range of 3 to 20%.

  When the sound absorbing layer 11 is pasted on the rim R or on the tire body 5, a styrene-butadiene rubber latex adhesive, an aqueous polymer-isocyanate adhesive, or an acrylic or synthetic resin adhesive tape is used. Can be chemically bonded to the inner surface of the inner liner 10, and when the sound absorbing layer 11 is attached to the unvulcanized tire body 5, it is temporarily fixed with such an adhesive tape or adhesive, and then heated and heated. The sound absorbing layer 11 can be impregnated on the inner surface of the inner liner 10 and physically fixed by vulcanization molding by pressurization.

  The above description shows only a part of the embodiment of the present invention, and these configurations can be combined alternately or various changes can be made without departing from the gist of the present invention. For example, although not shown, the sound absorbing layer can be affixed over the circumference on the tire inner surface, but can also be partially affixed to the tire inner surface.

  Next, a conventional tire (conventional tire) in which a wireless tag device (here, TPMS) is attached to the inner surface of the tread portion with an adhesive, and a sound absorbing layer is attached to the inner surface of the tread portion with an adhesive, and a wireless tag device ( Here, tires (example tires) according to the present invention, in which TPMS) are attached by hook-and-loop fasteners, were each prototyped and used for evaluation as radial tires for passenger cars having a tire size of 225 / 45R17, and will be described below.

The conventional tire is a tire in which TPMS is attached to the inner liner on the inner surface of the tread portion with an acrylic adhesive. Example tires have a sound absorbing layer affixed to the inner liner with a double-sided tape (Nitto Denko Corp., product number: 5000N) over the entire inner surface of the tread, and a removable surface fastener is used on the sound absorbing layer. A tire with TPMS attached. The sound-absorbing layer is composed of a non-woven fabric made of a belt-like aramid fiber having a fineness diameter of 12.5 μm, density (weight per unit area): 100 g / cm ² , volume ratio: 5%, thickness: 20 mm, and width: 100 mm. . And tire wheels fitted with respective test tires in size 7 _^1/2 JJ rim, were subjected to the following evaluation.

  The effect of suppressing the cavity resonance is that each tire wheel is mounted on all four wheels of a front wheel drive vehicle (FF vehicle) in a state where air pressure: 230 kPa (relative pressure) and tire load load: 4.0 kPa are applied. Vehicle interior noise when traveling on an asphalt road surface under the condition of a speed of 80 km / h was collected and measured with a microphone installed in the driver's window side ear. This measurement result was subjected to frequency analysis, and a relative value was evaluated as to how much the peak sound pressure level seen in the vicinity of 250 kHz was reduced in the example tire with respect to the conventional tire. Shown in As is clear from the results in Table 1, the cavity resonance of the example tire was effectively suppressed as compared with the conventional tire.

  The evaluation of the adhesion of TPMS is based on the conditions of the high-speed performance test A defined in JIS D4230 (based on JISMA automobile tire safety standards (quality standards)) using each tire wheel, and the diameter is 1.7 m. The drum durability performance test using the drum of No. 1 was carried out, and after 20,000 km traveling, the TPMS was peeled / dropped / failed and visually evaluated for evaluation, and the results are shown in Table 1. Specifically, the case where damage of TPMS was confirmed was evaluated as (×), the case where partial peeling was confirmed by TPMS was (Δ), and the case where peeling was not confirmed by TPMS was evaluated as (◯). . As is clear from the results in Table 1, the example tires were not even partially peeled off by TPMS, whereas the conventional tires were not found to be damaged by TPMS, but peeling of TPMS was confirmed. It was.

  As can be seen from the above, according to the present invention, it is possible to attach and detach various wireless tag devices having various shapes while suppressing cavity resonance by optimizing the attachment means to the sound absorbing layer of the wireless tag device. Therefore, it is possible to provide a tire and an assembly of a tire and a rim, in which the adhesion of the wireless tag device is improved.

DESCRIPTION OF SYMBOLS 1 Tire 2 Tread part 3 Side wall part 4 Bead part 5 Tire main-body part 6 Bead core 7 Carcass 8 Belt 9 Tire lumen 10 Inner liner 11 Sound absorption layer 12 Adhesive layer 13 Wireless tag apparatus 14 TPMS
15 Hook surface 16 Loop surface 17 TPMS body (wireless tag body)
18 Antenna R rim

Claims (13)

A tire comprising a non-woven fabric, a sound absorbing layer affixed to the tire inner surface, and a wireless tag device attached on the sound absorbing layer,
The tire, wherein the wireless tag device is detachably attached to the sound absorbing layer with a hook-and-loop fastener.   The tire according to claim 1, wherein the wireless tag device includes a wireless tag main body and an antenna, and at least a part of the antenna is embedded and fixed to a sound absorbing layer.   The tire according to claim 1, wherein the sound absorbing layer and the RFID tag device are provided on an inner surface of a tread portion.   The tire according to any one of claims 1 to 3, wherein the sound absorbing layer is composed of a nonwoven fabric formed by bonding fibers.   The tire according to claim 4, wherein the fibers are bonded by heat welding.   The tire according to claim 4, wherein the fibers are bonded by an adhesive.   The tire according to any one of claims 6 to 7, wherein the adhesive is an emulsion resin adhesive, a natural rubber latex adhesive, a synthetic rubber latex adhesive, or a water-soluble resin aqueous solution adhesive. A tire and rim assembly comprising a non-woven fabric, a sound absorbing layer affixed on the rim, and a wireless tag device attached on the sound absorbing layer,
An assembly of a tire and a rim, wherein the wireless tag device is detachably attached to the sound absorbing layer by a hook-and-loop fastener.   The tire and rim assembly according to claim 8, wherein the wireless tag device includes a wireless tag main body and an antenna, and at least a part of the antenna is embedded and fixed to the sound absorbing layer.   The tire according to claim 8 or 9, wherein the sound absorbing layer is formed of a nonwoven fabric formed by bonding fibers.   The tire according to claim 10, wherein the fibers are bonded by heat welding.   The tire according to claim 10, wherein the fibers are bonded by an adhesive.   The tire according to claim 12, wherein the adhesive is an emulsion resin adhesive, a natural rubber latex adhesive, a synthetic rubber latex adhesive, or a water-soluble resin aqueous solution adhesive.

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