JP3754183B2 - Transponder-equipped tire and manufacturing method thereof - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
  The present invention relates to a transponder-equipped tire and a method for manufacturing a transponder-equipped tire.
[0002]
[Prior art]
  Traditionally, automating production, tracking tires during and after production, classification, inventory management, shipping, statistical process management, field engineering, anti-theft, maintenance, regeneration management, application to other tires, identification, etc. Therefore, a transponder-equipped tire is known in which a transponder in which tire-specific information (ID information) is stored in an electronic circuit is provided (for example, “transponder attached” disclosed in Japanese Utility Model Laid-Open No. 2-123404). Pneumatic tire ").
[0003]
  The ID information stored in the transponder can include data such as tire size, model, manufacturing plant name, manufacturing line number, manufacturing serial number, manufacturing date, shipping date, and the like.
[0004]
[Problems to be solved by the invention]
  However, the conventional transponder-equipped tire described above is premised on large tires mainly used for trucks, buses, and the like, and is difficult to apply to tires used for motorcycles, passenger cars, and the like.
[0005]
  That is, in the case of a large tire, since the tire is large and thick, there are many places where a transponder including an antenna is embedded in the structure, and the embedding operation can be performed relatively easily.
[0006]
  However, since tires for motorcycles and passenger cars are smaller and thinner than those for buses and trucks, there are not many places to embed transponders in the structure. Further, when embedding the transponder in the tire structure, it has been very difficult to prevent the tire performance from being deteriorated.
[0007]
  In view of the above problems, an object of the present invention is to provide a transponder-equipped tire capable of obtaining desired tire performance even for motorcycles, passenger cars, and the like, and a method for manufacturing the same.
[0008]
[Means for Solving the Problems]
  In order to achieve the above object, according to the present invention, in claim 1, there is provided a transponder which has information storage means and accesses information in the information storage means by a predetermined electromagnetic wave signal, and is rubberized below the cap tread. In the transponder-equipped tire having a cord layer, the transponder is connected to a main body that is sufficiently thinner than the cap tread and to the outside of the main body.Dipole type or monopole typeThe transponder is bonded to a predetermined layer between the cap tread and the rubberized cord layer.The wire antenna is arranged extending in the circumferential direction of the tireProposal of transponder-equipped tires.
[0009]
  According to the transponder-equipped tire, the transponder is attached to a predetermined layer between the cap tread and the rubberized cord layer and is embedded in the tire. Accordingly, the transponder can be stably held in the tire, and the transponder can be easily incorporated in the tire manufacturing process. Furthermore, the transponder has a body that is sufficiently thin compared to the thickness of the cap tread, and the transponder is outside the body.Dipole type or monopole typeWith wire antennaThe wire antenna is arranged extending in the circumferential direction of the tireTherefore, the shape of the main body is reduced to the extent that the wire antenna is not in the main body, and it is not affected as a foreign object even if it is embedded in the tire.
[0010]
  Furthermore, since the wire antenna is arranged extending in the circumferential direction of the tire, when the transponder is arranged between the upper and lower layers, for example, between the cap tread and the under tread, rather than arranging the wire antenna in one place, The adhesion between the cap tread and the under tread is improved, and deterioration of the tire performance is prevented. Furthermore, when the length of the wire antenna is sufficiently long, poor access to the transponder due to the rotation of the tire can be reduced.
[0011]
  According to a second aspect of the present invention, in the transponder-equipped tire according to the first aspect, an undertread that is in close contact with the cap tread is provided between the cap tread and the rubberized cord layer, and the transponder We propose a transponder-equipped tire placed between the tread.
[0012]
  According to the transponder-equipped tire, the transponder is provided between the cap tread and the under tread and embedded in the tire. As a result, the transponder is stably held between the cap tread and the under tread, and the transponder can be easily incorporated by attaching the transponder to the inside of the cap tread component in the tire manufacturing process. it can. Furthermore, since the transponder has a main body that is sufficiently thin as compared to the thickness of the cap tread, and the transponder has a wire antenna outside the main body, the wire antenna is not in the main body, so the main body Even if the shape is small and embedded in the tire, it does not affect the foreign matter.
[0013]
  According to a third aspect of the present invention, in the transponder-equipped tire according to the first aspect, an undertread that is in close contact with the rubberized cord layer is provided between the cap tread and the rubberized cord layer, and the transponder includes the undertread. A transponder-equipped tire arranged between the rubber cord and the rubberized cord layer is proposed.
[0014]
  According to the transponder-equipped tire, the transponder is provided between the undertread and the rubberized cord layer and embedded in the tire. As a result, the transponder is stably held between the undertread and the rubberized cord layer, and the transponder is easily incorporated by attaching the transponder to the inside of the part that becomes the undertread in the tire manufacturing process. be able to. Furthermore, since the transponder has a main body that is sufficiently thin as compared to the thickness of the cap tread, and the transponder has a wire antenna outside the main body, the wire antenna is not in the main body, so the main body Even if the shape is small and embedded in the tire, it does not affect the foreign matter.
[0015]
  Also,Claim 4Then, claims 1 to3In the transponder-equipped tire according to any one of the above, the transponder proposes a transponder-equipped tire including an impedance matching circuit that matches the impedance of the wire antenna.
[0016]
  According to the transponder-equipped tire, since the impedance of the wire antenna is matched by the impedance matching circuit, it is possible to efficiently receive and radiate electromagnetic waves.
[0017]
  Also,Claim 5Then, claims 1 to4In the transponder-equipped tire according to any one of the above, a transponder-equipped tire is proposed in which the wire antenna is made of a predetermined metal wire having ductility, and the metal wire is subjected to brass plating.
[0018]
  According to the transponder-equipped tire, since the wire antenna is made of a ductile metal, even if a certain degree of deformation occurs in the tire, the wire antenna extends and contracts accordingly. Furthermore, since the metal is brass-plated, the adhesion with a coating compound used for adhesion is improved.
[0019]
  Also,Claim 6Then, claims 1 to5In the transponder-equipped tire according to any one of the above, at least the transponder main body and the wire antenna are in contact with each other.Tire componentsProposes a transponder-equipped tire made of a non-conductive member.
[0020]
  According to the transponder-equipped tire, it comes into contact with the main body of the transponder and the wire antenna.Tire componentsFor example, when the transponder is disposed between the cap tread and the undertread, at least a portion of the cap tread and the undertread that contacts the transponder is formed by a non-conductive member. As a result, it is possible to prevent a short circuit between the tire rubber and the transponder, which are normally conductive, and a ground short circuit through the tire rubber of the transponder, and to effectively operate the antenna of the transponder.
[0021]
  Also,Claim 7Then, in a method of manufacturing a transponder-equipped tire having an information storage means and having a transponder for accessing information in the information storage means by a predetermined electromagnetic wave signal, each part completed in the member processing step is replaced with one tire. In the molding process of assembling into a shape, a method for manufacturing a transponder-equipped tire is proposed in which the transponder is attached to the inner surface of a cap tread, which is one of the parts, and then assembled to generate a green tire.
[0022]
  According to the method for manufacturing a tire having a transponder, a green tire is generated by assembling the transponder after the transponder is attached to the inner surface of a cap tread which is one of parts in a tire molding process.
[0023]
  Also,Claim 8Then, in a method of manufacturing a transponder-equipped tire having an information storage means and having a transponder for accessing information in the information storage means by a predetermined electromagnetic wave signal, each part completed in the member processing step is replaced with one tire. In the molding process of assembling into a shape, a method of manufacturing a transponder-equipped tire is proposed in which the transponder is attached to the inner surface of the undertread, which is one of the parts, and then assembled to generate a green tire.
[0024]
  According to the manufacturing method of the transponder-equipped tire, assembly is performed after the transponder is attached to the inner surface of the undertread, which is one of the parts in the tire molding process, and a green tire is generated.
[0025]
  Also,Claim 9ThenClaim 7 or 8In the described method for manufacturing a transponder-equipped tire, a method for manufacturing a transponder-equipped tire is proposed in which the transponder is covered with a non-conductive compound before being attached to the part.
[0026]
  According to the method for manufacturing a tire having a transponder, the transponder is wrapped with a non-conductive compound, so that even when the tire rubber of the transponder has conductivity, a ground short circuit through the tire rubber can be prevented.
[0027]
  Also,Claim 10ThenClaim 7 or 8In the method for manufacturing a transponder-equipped tire described above, a method for manufacturing a transponder-equipped tire is proposed in which a tire part that contacts the transponder is formed of non-conductive rubber.
[0028]
  According to the method for manufacturing a tire equipped with a transponder, since the tire part in contact with the transponder is formed of non-conductive rubber, a ground short circuit through the tire rubber can be prevented.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
  FIG. 1 is a fragmentary perspective view showing a transponder-equipped tire according to a first embodiment of the present invention. In the figure, reference numeral 10 denotes a transponder-equipped tire (hereinafter simply referred to as a tire), which is a well-known tubeless radial tire. 11 is a carcass, 12A and 12B are belts, 13 is an undertread, 14 is a cap tread, and 20 is a transponder.
[0030]
  In this radial structure, the carcass 11 is a belt having a cord angle of about 20 to 30 degrees on which the carcass cord is arranged at approximately 90 degrees with respect to the circumferential direction and made of one or two layers of carcass. 12A and 12B are arranged so that the cords cross each other.
[0031]
  Further, an under tread 13 and a cap tread 14 are arranged in the order of description on these belts 12A and 12B.
[0032]
  Here, the rubberized cord layer disposed between the cap tread 14 and the carcass 11 is called a belt in the case of a radial tire, and is called a breaker in the case of a bias tire. That is, in the bias structure, the carcass is arranged at 35 to 45 degrees with respect to the circumferential direction, and a plurality of carcasses are overlapped so that the cords cross each other, and a breaker for protecting the carcass is arranged thereon. The
[0033]
  As shown in FIG. 2, the transponder 20 includes a main body 21 and wire antennas 22A and 22B provided outside the main body, and two wire antennas 22A connected in a dipole antenna type with the main body 21 as the center. , 22B extending in the tire circumferential direction, and being sandwiched between the undertread 13 and the cap tread 14.
[0034]
  The transponder main body 21 has a small casing 21a made of an epoxy resin having heat resistance that can withstand heat of 180 ° C. or more, for example, a casing 21a having dimensions of 2 × 3 × 0.4 mm. An electronic circuit is incorporated inside.
[0035]
  Here, when embedding the transponder 20 in the tire, it is necessary to make the thickness of the transponder main body 21 sufficiently thinner than the thickness of the cap tread 14 in order to prevent the transponder 20 from becoming a foreign substance and deteriorating the tire performance. The thickness of the transponder body 21 is preferably set to 10% or less of the thickness of the cap tread 14. Further, when the transponder body 21 has flexibility, for example, when the flexible printed wiring board is covered with rubber, the allowable range of the thickness of the transponder body 21 is increased, and the thickness of the cap tread 14 is 10%. If the transponder body 21 is not flexible, it is better that the thickness is as thin as possible.
[0036]
  In the present embodiment, the transponder body 21 has a thickness of 0.4 mm, and the cap tread 14 has a thickness of 9 mm. The thickness of the undertread 13 is 1 mm, and the thickness of the wire antennas 22A and 22B is 0.1 mm.
[0037]
  The wire antennas 22A and 22B are made of a ductile metal material, such as copper or aluminum, and the surface thereof is subjected to brass plating (zinc + copper plating). As described above, the adhesion to the coating compound can be increased by performing the brass plating on the surface of the metal material.
[0038]
  Further, normally, each rubber constituting the tire uses carbon black as a reinforcing material, and is therefore conductive. Therefore, when the transponder 20 is embedded in the tire as described above, at least the cap tread 14 and the under tread 13 in contact with the transponder 20 must be non-conductive in order to prevent a short circuit between the wire antennas 22A and 22B. I must.
[0039]
  For this reason, in the first embodiment, non-conductive rubber is used for the under tread 13 and the cap tread 14.
[0040]
  As this non-conductive rubber, carbon black is preferably replaced with non-conductive silica or clay, and examples thereof include the following compounding.
    NR (SIR-20) 70
    SBR (Nippol 1502) 30
    Silica (Nihon Silica Nipzil AG) 90phr (Carbon Black 0)
    Others Oil, silane coupling agent, sulfur, vulcanization accelerator, etc.
Mixed.
[0041]
  In general, the type of polymer, vulcanizing agent, and the like do not affect the conductivity, and may be designed according to the purpose of each rubber. The important point here is that conductive carbon black is reduced or not used. It is preferable to replace all the carbon black with silica as in the above-described blending example. However, if the carbon black is 20 parts or less with respect to 100 parts of rubber, the wire antennas 22A and 22B of the transponder 20 are short-circuited. It has been confirmed by experiments that it performs well without being performed. In addition, even when carbon black is used, the conductivity can be reduced by increasing the particle size. Here, the non-conductive rubber is 1 × 10⁸ Those having a volume resistivity of (Ω · m) or more are preferred.
[0042]
  The experimental result of the compounding example of the compound (under tread compound, cap tread compound) used for the said nonelectroconductive rubber in FIG. 3 is shown. In FIG. 3, the standard example is a mixture of carbon only, and the volume specific resistance value is low and it is easy to energize. On the other hand, since Examples 1-3 had a sufficiently high resistance value, it was difficult to energize and desired effects were obtained. Further, as shown in Comparative Examples 1 and 2, even when a part of carbon was replaced with silica, the volume resistivity value was not so high.
[0043]
  FIG. 4 is a block diagram showing an electric circuit of the transponder 20 in the first embodiment. In the figure, 211 is a filter, 212 is a rectifier, 213 is a smoothing circuit, 214 is a central processing unit, 215 is a nonvolatile rewritable memory, 216 is a response signal transmission unit, and 217a and 217b are for connecting a wire antenna. Terminal.
[0044]
  The transponder 20 does not have a power source in its interior, and instead uses an interrogation signal sent from an interrogator generated from the outside of the tire as its energy source. The interrogation signal is shaped (rectified) by a circuit in the transponder 20, and then the digitally encoded electrical signal to be used for identifying the tire stored in the memory 215 is utilized by using the shaped signal as an energy source. Used to send outside.
[0045]
  Here, the “interrogator” calls the transponder 20 to respond with a signal including its unique ID information, and uses the energy of the call signal (question signal) as the driving power and response signal of the electronic circuit inside the transponder. A device for applying the energy to the transponder as energy.
[0046]
  When an interrogation signal is received from the interrogator by the wire antennas 22A and 22B, for example, an electromagnetic field signal of 500 KHz, the current flowing through the wire antennas 22A and 22B is less than a predetermined frequency (for example, 1 MHz) by the filter 211 of the transponder 20. Only the frequency component is passed, and after full-wave rectification by the rectifier 212, it is converted into a direct current by the smoothing circuit 213. This DC signal is used as driving power for the central processing unit 214 and other electric circuits.
[0047]
  When this driving power is input, first, the central processing unit 214 reads the ID information unique to the transponder stored in the memory 215, modulates a carrier wave of a predetermined frequency based on this ID information, Is transmitted to the response signal transmission unit 216 in order to transmit it as a digitized response signal.
[0048]
  The response signal transmission unit 216 transmits this digitized response signal to a line where terminals 217a and 217b communicate with the filter 211 in order to transmit the response signal to the receiver. The response signal is sent to the receiver as an electromagnetic field signal via the wire antennas 22A and 22B.
[0049]
  Here, the “receiver” refers to a device for receiving a response signal including ID information, which the transponder 20 responds by receiving the interrogator interrogation signal.
[0050]
  Further, it is desirable that the frequency of the response signal (carrier frequency) including the ID data transmitted from the transponder 20 is higher than the frequency transmitted from the interrogator by four times or more of the former. For example, if the transmission frequency of the interrogator is 500 KHz as described above, the response signal of the transponder is 300 MHz. Accordingly, if only the current having a frequency component of 1 MHz or less passes through the filter 211, for example, the response signal is effectively transmitted to the receiver side without passing through the filter 211.
[0051]
  Next, a method for manufacturing the above-described transponder-equipped tire 10 will be described.
  First, in the mixing step, raw materials and compounding agents such as natural rubber, synthetic rubber, carbon black, sulfur and zinc white are mixed and kneaded and sent to the member processing step. In this mixing step, non-conductive rubber is used for the under tread 13 and the cap tread 14 as described above.
[0052]
  In the component processing process, each part of these tires, such as the carcass part that becomes the skeleton of the tire, the belt that reinforces it, the bead part that becomes the fitting part of the tire and the wheel, the tread part where the tire directly touches the ground, etc. Process. At this time, a reinforcing material such as steel or fiber is also used.
[0053]
  Then, each part completed in the member processing process is sent to the molding process, assembled into a single tire shape by a molding machine, and made into a green tire (raw tire). During the assembly, before the cap tread 14 is stuck on the under tread 13, the above-described transponder 20 is stuck and fixed to the inner surface of the cap tread 14. The cap tread 14 with the transponder 20 attached in this way is attached to the undertread 13.
[0054]
  Next, the green tire completed in the molding process is vulcanized (vulcanization process). In this vulcanization process, a green tire is put into a mold, and the mold is heated and simultaneously pressed with high-temperature and high-pressure steam from the inside toward the mold by a pressure device. As a result, rubber molecules and sulfur molecules are bonded by heat and pressure, and elasticity and durability are produced in the rubber of the green tire. In addition, the final shape and tread pattern of the tire are also made by the mold at this time. Thereby, a tire is completed. The completed tire is shipped through an inspection process.
[0055]
  As described above, according to the present embodiment, since the transponder 20 is bonded between the cap tread 14 and the under tread 13 and is embedded in the tire 10, the cap tread 14, the under tread 13, In the tire manufacturing process, the transponder 20 can be easily assembled by attaching the transponder 20 to the inside of the part that becomes the cap tread 14 in the tire manufacturing process.
[0056]
  Further, since the transponder 20 has a casing 21a that is sufficiently thinner than the thickness of the cap tread 14, and the transponder 20 includes wire antennas 22A and 22B outside the casing 21a, the wire antenna 22A. , 22B is not contained in the housing 21a, the housing 21a is reduced in size, and the influence of foreign matter on the tire can be reduced.
[0057]
  Furthermore, since the transponder 20 is incorporated in the process of generating the green tire, the coupling between the parts is not reduced by the incorporation of the transponder 20.
[0058]
  Thereby, even if the transponder 20 is embedded in the tire 10, there is no influence as a foreign matter, and the tire performance is not deteriorated even in a small tire used for a motorcycle, a passenger car, or the like.
[0059]
  Furthermore, since the transponder 20 is disposed outside the rubberized cord layers 12A and 12B, radio waves are not shielded by the rubberized cord layers 12A and 12B.
[0060]
  In the first embodiment, the transponder 20 is disposed between the under tread 13 and the cap tread 14, but the same effect can be obtained by disposing the transponder 20 between the under tread 13 and the rubberized cord layers 12A and 12B. Obtainable. In this case, the rubberized cord layers 12A and 12B and the undertread 13 disposed in the upper layer are formed of non-conductive rubber, and the transponder 20 is attached to the inner surface of the part to be the undertread 13 in the molding process at the time of manufacture. Just keep it.
[0061]
  Next, a second embodiment of the present invention will be described.
  In the second embodiment, the transponder 20 is covered with a non-conductive compound in advance, and even when a tire part made of a material having normal conductivity is used, a ground short circuit of the transponder 20 via the tire rubber is prevented. .
[0062]
  That is, as shown in FIG. 5, the main body 21 of the transponder 20 and the wire antennas 22 </ b> A and 22 </ b> B provided outside the main body are covered with the non-conductive compound 31.
[0063]
  Thus, the transponder 20 covered with the non-conductive compound 31 is formed between the undertread 13 and the cap tread 14 or between the undertread 13 and the rubberized cord in the tire molding process as in the first embodiment. Arranged between the layers 12A and 12B.
[0064]
  Also in the second embodiment, the same effect as that of the first embodiment described above can be obtained.
[0065]
  Next, a third embodiment of the present invention will be described.
  In the third embodiment, the impedance matching circuit for matching the impedance of the wire antenna is provided in the transponder in the first or second embodiment described above.
[0066]
  FIG. 6 is a block diagram illustrating an electric circuit of the transponder 20 'according to the third embodiment. In the figure, the same components as those of the transponder 20 in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.
[0067]
  That is, the transponder 20 ′ in the third embodiment is provided with the impedance matching circuit 218 interposed between the filter 211 and the response signal transmission unit 216 and the terminals 217 a and 217 b for connecting the wire antenna.
[0068]
  As a result, the impedance in the closed loop of the electronic circuit constituting the transponder 20 'can be adjusted (impedance matching), the reflection of the reception signal and the reflection of the transmission signal at the terminals 217a and 217b can be eliminated, and the sensitivity can be increased.
[0069]
  The configuration of the transponders 20 and 20 'in the above-described embodiment is an example, and the present invention is not limited to this. For example, as shown in FIG. 7, a transponder provided with one wire antenna 22C may be used.
[0070]
  FIG. 7 is a block diagram showing an electric circuit of the transponder 20 ″ when one wire antenna 22C is an electric field coupling type antenna. Here, electric field coupling is a signal transmitted from an interrogator. This refers to a method of picking up an electric field component, which is usually detected by an absolute value with reference to the ground G. Therefore, the wire antenna 22C only needs to pick up an electric field signal based on a predetermined position. Therefore, only one wire antenna may be provided in the transponder 20 ″.
[0071]
  Here, when the interrogator interrogation signal, for example, an electric field signal of 500 KHz is received by the wire antenna 22C, the electric field signal is received by the other electrode of the capacitor (C) connected to the ground (G). It is converted into a current through a resistor (R). Then, only a frequency component equal to or lower than a predetermined frequency is passed through the filter 211 ′ of the transponder 20 ″, and this current is full-wave rectified by the rectifier 212 and then converted into a direct current by the smoothing circuit 213.
[0072]
  This direct current is used as power for driving the central processing unit 214 and other circuits. When this driving power is input, the central processing unit 214 first reads the ID information unique to the transponder stored in the memory 215, as in the above-described embodiment, and based on this ID information, the predetermined frequency is read. After the carrier wave is modulated, it is sent to the response signal transmitter 216 to transmit it as a response signal.
[0073]
  The response signal transmission unit 216 transmits a response signal including this ID information to a line where the terminal 217c communicates with the capacitor (C) in order to transmit the response signal to the receiver.
[0074]
  As a result, the response signal is sent to the receiver as an electric field signal via the transmission / reception antenna including the wire antenna 22C.
[0075]
  Also in this case, it is desirable that the frequency (carrier wave) of the response signal including the ID information transmitted from the transponder 20 ″ is higher than the frequency transmitted from the interrogator by four times or more of the former. For example, if the transmission frequency of the interrogator is set to 500 KHz as described above, the response signal of the transponder is set to 300 MHz, and then the filter 211 ′ is set to, for example, 1 MHz. If only the following frequency components (currents) pass, the response signal is effectively sent to the transmitter side without passing through the filter 211 ′.
[0076]
【The invention's effect】
  As described above, according to the transponder-equipped tire according to claim 1 of the present invention, the transponder is bonded to a predetermined layer between the cap tread and the rubberized cord layer and is provided in a state embedded in the tire. Therefore, the transponder is stably held in the tire, and the transponder can be easily incorporated in the tire manufacturing process. Furthermore, since the transponder has a main body that is sufficiently thin as compared to the thickness of the cap tread, and the transponder has a wire antenna outside the main body, the wire antenna is not in the main body, so the main body Even if the shape of the tire is small and embedded in the tire, it does not have an influence as a foreign substance, and even in a small tire used for a motorcycle, a passenger car, etc., the tire performance is not deteriorated.
[0077]
  In addition, since the wire antenna of the transponder is arranged so as to extend in the circumferential direction of the tire, the adhesion between the upper and lower layers sandwiching the wire antenna is improved and the tire is arranged rather than arranging the wire antenna in one place. Performance degradation is prevented. Furthermore, when the length of the wire antenna is sufficiently long, poor access to the transponder due to the rotation of the tire can be reduced.
[0078]
  Further, according to the transponder-equipped tire according to claim 2, in addition to the above effect, the transponder is provided between the cap tread and the under tread and is embedded in the tire. The transponder is stably held between the cap tread and the under tread, and the transponder can be easily assembled by attaching the transponder to the inside of the cap tread component in the tire manufacturing process.
[0079]
  According to the transponder-equipped tire according to claim 3, in addition to the above effects, the transponder is provided between the undertread and the rubberized cord layer and embedded in the tire. ing. As a result, the transponder is stably held between the undertread and the rubberized cord layer, and the transponder is easily incorporated by attaching the transponder to the inside of the part that becomes the undertread in the tire manufacturing process. be able to.
[0080]
  Also,Claim 4According to the described transponder-equipped tire, in addition to the above effects, the impedance of the wire antenna is matched by the impedance matching circuit, so that it is possible to efficiently receive and radiate electromagnetic waves and to improve the power usage efficiency. Can be increased.
[0081]
  Also,Claim 5According to the described transponder-equipped tire, in addition to the above-described effects, the wire antenna is made of a metal having ductility. Therefore, even if a certain degree of deformation occurs in the tire, the wire antenna expands and contracts accordingly. Therefore, cutting of the wire antenna due to tire deformation at the time of tire manufacture and use can be prevented. Furthermore, since the metal of the wire antenna is brass-plated, the adhesion with the coat compound can be increased.
[0082]
  Also,Claim 6According to the described transponder-equipped tire, in addition to the above effects, the transponder main body and the wire antenna are wrapped by the non-conductive member, so that a short circuit between them and a ground short circuit through the tire rubber can be prevented. The antenna can be effectively operated.
[0083]
  Also,Claim 7According to the described method for manufacturing a transponder-equipped tire, a green tire is generated by assembling the transponder after the transponder is attached to the inner surface of the cap tread which is one of the parts in the tire molding process. The transponder can be incorporated into the tire without significant changes to the manufacturing process. Further, since the transponder is incorporated in the process of generating the green tire, the coupling between the parts is not lowered by the incorporation of the transponder, and the tire performance is not deteriorated.
[0084]
  Also,Claim 8According to the method for manufacturing a transponder-equipped tire described above, since the assembly is performed after the transponder is attached to the inner surface of the under tread which is one of the parts in the tire molding process, a green tire is generated. The transponder can be incorporated into the tire without significant changes to the tire manufacturing process. Further, since the transponder is incorporated in the process of generating the green tire, the coupling between the parts is not lowered by the incorporation of the transponder, and the tire performance is not deteriorated.
[0085]
  Also,Claim 9According to the method of manufacturing a transponder-equipped tire described above, in addition to the above-described effect, the transponder is wrapped with a non-conductive compound, so that even when the tire rubber of the transponder has conductivity, a ground short circuit through the tire rubber is prevented. Can be prevented.
[0086]
  Also,Claim 10According to the method for manufacturing a transponder-equipped tire described above, in addition to the above-described effects, the tire parts that come into contact with the transponder are formed of non-conductive rubber, so that a ground short circuit through the tire rubber of the transponder can be prevented.
[Brief description of the drawings]
FIG. 1 is a fragmentary perspective view showing a transponder-equipped tire according to a first embodiment of the present invention.
FIG. 2 is a configuration diagram showing a transponder according to the first embodiment of the present invention.
FIG. 3 is a diagram showing experimental results of a compounding example of a compound used for the non-conductive rubber in the first embodiment of the present invention
FIG. 4 is a block diagram showing an electric circuit of the transponder in the first embodiment of the present invention.
FIG. 5 is a diagram for explaining a state of covering a non-conductive compound on a transponder according to a second embodiment of the present invention.
FIG. 6 is a block diagram showing an electric system circuit of a transponder according to a third embodiment of the present invention.
FIG. 7 is a block diagram showing an electric system circuit of another transponder according to the present invention.
[Explanation of symbols]
  DESCRIPTION OF SYMBOLS 10 ... Transponder-equipped tire, 11 ... Carcass, 12A, 12B ... Belt (rubber cord layer), 13 ... Under tread, 14 ... Cap tread, 20, 20 ', 20 "... Transponder, 21, 21', 21" ... Main body, 21a ... housing, 211,211 '... filter, 212 ... rectifier, 213 ... smoothing circuit, 214 ... central processing unit, 215 ... memory, 216 ... response signal transmission unit, 217a, 217b, 217c ... terminal, 218 , 218 '... impedance matching circuit, 22A, 22B, 22C ... wire antenna, 31 ... non-conductive compound.

Claims (10)

In a transponder-equipped tire having an information storage means, comprising a transponder that accesses information in the information storage means by a predetermined electromagnetic wave signal, and having a rubberized cord layer below the cap tread,
The transponder has a main body that is sufficiently thinner than the cap tread, and a dipole or monopole type wire antenna connected to the outside of the main body,
The transponder is bonded to a predetermined layer between the cap tread and the rubberized cord layer ,
The transponder-equipped tire, wherein the wire antenna is arranged extending in a circumferential direction of the tire.   2. An undertread that is in close contact with the cap tread is provided between the cap tread and a rubberized cord layer, and the transponder is disposed between the cap tread and the undertread. The transponder-equipped tire described.   Between the cap tread and the rubberized cord layer, there is an undertread that is in close contact with the rubberized cord layer, and the transponder is disposed between the undertread and the rubberized cord layer. The transponder-equipped tire according to claim 1. The transponder-equipped tire according to any one of claims 1 to 3 , wherein the transponder includes an impedance matching circuit that matches the impedance of the wire antenna. The transponder-equipped tire according to any one of claims 1 to 4 , wherein the wire antenna is made of a predetermined metal wire having ductility, and the metal wire is subjected to brass plating. 6. The transponder-equipped tire according to any one of claims 1 to 5 , wherein at least a tire component that contacts the transponder main body and the wire antenna is made of a non-conductive member. In a method of manufacturing a transponder-equipped tire having an information storage means and having a transponder for accessing information in the information storage means by a predetermined electromagnetic wave signal,
In the molding process of assembling each part created in the component processing process into one tire shape, the transponder is attached to the inner surface of the cap tread, which is one of the parts, and then assembled to produce a green tire. A method for manufacturing a transponder-equipped tire. In a method of manufacturing a transponder-equipped tire having an information storage means and having a transponder for accessing information in the information storage means by a predetermined electromagnetic wave signal,
In the molding process that assembles each part created in the component processing process into a single tire shape, the transponder is attached to the inner surface of the undertread, which is one of the parts, and then assembled to produce a green tire. A method for manufacturing a transponder-equipped tire. The method for manufacturing a transponder-equipped tire according to claim 7 or 8, wherein the transponder is covered with a non-conductive compound before being attached to the part. 9. The method for manufacturing a transponder-equipped tire according to claim 7 or 8, wherein the tire parts that are in contact with the transponder are made of non-conductive rubber.

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