Non-pneumatic tire

Abstract

To provide a non-pneumatic tire whose communication device can be prevented from being damaged when a vehicle runs.SOLUTION: A non-pneumatic tire according to the present invention comprises: a wheel member that can be mounted on an axle; a ring member attached to the wheel member; a spiral reinforcement layer 4 formed by winding a strand body 20 spirally on an outer peripheral surface of the ring member, the strand body having one cord or a plurality of parallely arranged cords buried in a coated body; a tread member surrounding the outside in a tire radial direction of the spiral reinforcement layer; and a communication device 6 arranged in a tire circumferential direction adjacently to an end face 20a at one side of the strand body.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to non-pneumatic tires.

Background Art

[0002] Patent Document 1 discloses a non-pneumatic tire. The non-pneumatic tire disclosed in Patent Document 1 includes a mounting body attached to an axle, an outer cylinder that surrounds the mounting body from the outside in the tire radial direction, a tread portion that surrounds the outer cylinder from the outside in the tire radial direction, and a connecting member that connects the mounting body and the outer cylinder so as to be displaceable. Further, on the outer peripheral surface of the outer cylinder of the non-pneumatic tire described in Patent Document 1, a spiral reinforcing layer formed by spirally winding a single cord or a plurality of parallel cords embedded in a covering body is adhered.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventor of the present invention newly conceived of providing a communication device (for example, an RF tag, etc.) in a non-pneumatic tire as described in Patent Document 1, and newly found a configuration capable of suppressing damage to the communication device in the non-pneumatic tire when the vehicle equipped with the non-pneumatic tire is running (hereinafter, simply referred to as "when the vehicle is running"), and thus completed the present invention.

[0005] An object of the present invention is to provide a non-pneumatic tire capable of suppressing damage to a communication device when the vehicle is running.

Means for Solving the Problems

[0006] The non-pneumatic tire according to the first aspect of the present invention is (1) a wheel member attachable to an axle, a ring member attached to the wheel member, a spiral reinforcing layer formed by spirally winding a single wire or a plurality of parallel wires embedded in a covering on the outer peripheral surface of the ring member, a tread member surrounding the outside of the spiral reinforcing layer in the tire radial direction, and a communication device disposed adjacent to one end surface of the wire body in the tire circumferential direction. The non-pneumatic tire includes these components.

[0007] The non-pneumatic tire according to one embodiment of the present invention is (2) the non-pneumatic tire according to (1) above, wherein the entire communication device is located inside the outer end of one end surface of the wire body in the tire width direction.

[0008] The non-pneumatic tire according to one embodiment of the present invention is (3) the non-pneumatic tire according to (2) above, wherein the entire communication device is located inside the outer end of the end surface of the wire in one end surface of the wire body in the tire width direction.

[0009] The non-pneumatic tire according to one embodiment of the present invention is (4) the non-pneumatic tire according to any one of (1) to (3) above, wherein the entire communication device is located inside the outer end in the tire radial direction of one end surface of the wire body in the tire radial direction.

[0010] The non-pneumatic tire according to one embodiment of the present invention is (5) The entire communication device is located inside the outer end in the tire radial direction of the end face of the cord at the one end face of the wire body in the tire radial direction, the non-pneumatic tire according to (4) above.

[0011] A non-pneumatic tire as one embodiment of the present invention is (6) The communication device has an elongated shape, The communication device is arranged such that the longitudinal direction thereof is along the tire circumferential direction, the non-pneumatic tire according to any one of (1) to (5) above.

[0012] A non-pneumatic tire as one embodiment of the present invention is (7) The ring member is An inner cylinder body mounted on the wheel member, An outer cylinder body surrounding the outside in the tire radial direction of the inner cylinder body, A connecting member that connects the inner cylinder body and the outer cylinder body and is elastically deformable between the inner cylinder body and the outer cylinder body, and is provided with The spiral reinforcing layer is formed by spirally winding the wire body on the outer peripheral surface of the outer cylinder body, the non-pneumatic tire according to any one of (1) to (6) above.

[0013] A non-pneumatic tire as one embodiment of the present invention is (8) The communication device is an RF tag, the non-pneumatic tire according to any one of (1) to (7) above.

Advantages of the Invention

[0014] According to the present invention, it is possible to provide a non-pneumatic tire capable of suppressing damage to the communication device when the vehicle is running.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0016] Hereinafter, embodiments of the non-pneumatic tire according to the present invention will be exemplified and described with reference to the drawings. The same components are denoted by the same reference numerals in each figure. Hereinafter, the direction parallel to the tire central axis O of the non-pneumatic tire is described as the "tire width direction A". Hereinafter, the direction around the tire central axis O of the non-pneumatic tire is described as the "tire circumferential direction B". Hereinafter, in the cross section orthogonal to the tire central axis O of the non-pneumatic tire, the radial direction of the virtual circle centered on the tire central axis O is described as the "tire diameter direction C".

[0017] FIG. 1 is a side view of a non-pneumatic tire 1 as an embodiment of the non-pneumatic tire according to the present invention. FIG. 2 is an enlarged view of a part of FIG. 1. FIG. 3 is a cross-sectional view at the position of the I-I line in FIG. 2.

[0018] As shown in FIG. 1, the non-pneumatic tire 1 of the present embodiment includes a wheel member 2, a ring member 3, a spiral reinforcing layer 4, a tread member 5, and a communication device 6. The non-pneumatic tire 1 is mounted on the axles of various vehicles such as bicycles, motorcycles, and automobiles and used.

[0019] As shown in FIG. 1, the wheel member 2 is formed in a disc shape. Each of the ring member 3, the spiral reinforcing layer 4, and the tread member 5 is formed in an annular shape. The central axis of the wheel member 2, the central axis of the ring member 3, the central axis line of the spiral reinforcing layer 4, and the central axis line of the tread member 5 are located on a common axis. In the present embodiment, this common axis is the tire central axis O.

[0020] In the present embodiment, the central positions in the tire width direction A of the wheel member 2, the ring member 3, the spiral reinforcing layer 4, and the tread member 5 respectively are substantially coincident. The wheel member 2, the ring member 3, the spiral reinforcing layer 4, and the tread member 5 of the present embodiment have a structure symmetric with respect to the tire width direction A with reference to the tire equatorial plane CL (see FIG. 3) passing through the central position in the tire width direction A as a whole, but are not limited to this configuration.

[0021] The wheel member 2 is configured to be attachable to an axle. Specifically, the wheel member 2 of the present embodiment includes a cylindrical boss 2a that extends in the tire width direction A and into which the axle is fitted, a mounting cylinder portion 2b fixed to the outer peripheral surface of the boss 2a, a support cylinder portion 2c that surrounds the outside in the tire radial direction C of the mounting cylinder portion 2b and supports the ring member 3 on the outer peripheral surface, and a plurality of spokes 2d that connect the mounting cylinder portion 2b and the support cylinder portion 2c.

[0022] Each of the boss 2a, the mounting cylinder portion 2b, and the support cylinder portion 2c is arranged such that the central axis is located on the tire central axis O. The plurality of spokes 2d are arranged, for example, at equal intervals in the tire circumferential direction B. Each of the plurality of spokes 2d extends radially in the tire radial direction C around the boss 2a.

[0023] The boss 2a, the mounting cylinder part 2b, the support cylinder part 2c, and the plurality of spokes 2d may be made of a metal such as, for example, an aluminum alloy. Further, the boss 2a, the mounting cylinder part 2b, the support cylinder part 2c, and the plurality of spokes 2d may be made of a resin such as, for example, a thermoplastic resin. Furthermore, some of the elements of the boss 2a, the mounting cylinder part 2b, the support cylinder part 2c, and the plurality of spokes 2d may be made of metal and the other elements may be made of resin. Thus, the material of the components of the wheel member 2 is not particularly limited.

[0024] The ring member 3 is attached to the wheel member 2. More specifically, the ring member 3 of the present embodiment is externally fitted to the support cylinder part 2c of the wheel member 2 and is supported on the outer peripheral surface of the support cylinder part 2c.

[0025] The ring member 3 includes an inner cylinder body 11, an outer cylinder body 12, and a connecting member 13.

[0026] The inner cylinder body 11 is fixed to the wheel member 2. Specifically, the inner cylinder body 11 of the present embodiment is externally fitted to the support cylinder part 2c of the wheel member 2 and is supported by the outer peripheral surface of the support cylinder part 2c over the entire region in the tire circumferential direction B. The inner cylinder body 11 of the present embodiment is fixed to the support cylinder part 2c by being joined to the support cylinder part 2c with a fastening member such as a bolt in this state. The inner cylinder body 11 is attached to the axle via the wheel member 2.

[0027] The outer cylinder body 12 surrounds the outside of the inner cylinder body 11 in the tire radial direction C. The central axis of the inner cylinder body 11 and the central axis of the outer cylinder body 12 are located on the tire central axis O. The inner cylinder body 11 and the outer cylinder body 12 of the present embodiment are arranged in a state where the central portions in their respective tire width directions A coincide with each other.

[0028] The connecting member 13 connects the inner cylinder body 11 and the outer cylinder body 12. The connecting member 13 is configured to be elastically deformable between the inner cylinder body 11 and the outer cylinder body 12. More specifically, the connecting member 13 is configured to be elastically deformable in the tire radial direction C between the inner cylinder body 11 and the outer cylinder body 12.

[0029] As shown in Fig. 1, a plurality of connecting members 13 of the present embodiment are arranged in the tire circumferential direction B. More specifically, the connecting members 13 of the present embodiment are arranged in plurality in the tire circumferential direction B at a position between the inner cylinder 11 and the outer cylinder 12 in the tire radial direction C. These plurality of connecting members 13 are arranged at intervals in the tire circumferential direction B. That is, two adjacent connecting members 13 in the tire circumferential direction B are non-contact with each other and arranged at intervals in the tire circumferential direction B. Further, the plurality of connecting members 13 of the present embodiment are arranged so as to be point-symmetrical with each other with respect to the tire central axis O.

[0030] Further, the connecting member 13 of the present embodiment is a plate-like portion arranged such that its thickness direction is in the in-plane direction of a plane orthogonal to the tire central axis O. Further, in the connecting member 13 of the present embodiment, an outer end portion 13a on the outer side in the tire radial direction C connected to the outer cylinder 12 and an inner end portion 13b on the inner side in the tire radial direction C connected to the inner cylinder 11 are arranged at different positions in the tire circumferential direction B. By doing so, the plate-like portion as the connecting member 13 can be used as a leaf spring that is easily elastically deformed in the tire radial direction C. However, the configuration of the connecting member 13 is not limited to the configuration of the present embodiment.

[0031] The constituent materials of the inner cylinder 11, the outer cylinder 12, and the connecting member 13 are not particularly limited. The inner cylinder 11, the outer cylinder 12, and the connecting member 13 of the present embodiment are made of resin. The inner cylinder 11, the outer cylinder 12, and the connecting member 13 are preferably made of resin from the viewpoint of weight reduction. As the resin material for the inner cylinder 11, the outer cylinder 12, and the connecting member 13, for example, thermoplastic resins such as polyester and nylon, thermosetting resins such as vinyl ester resin and unsaturated polyester resin, and other synthetic resins can be used. The resin material may further contain fibers such as glass, carbon, graphite, aramid, polyethylene, and ceramic as reinforcing fibers.

[0032] In this embodiment, the inner cylinder 11, the outer cylinder 12, and the connecting member 13 are integrally formed of a resin material by injection molding. As the injection molding, a method of integrally molding the entire inner cylinder 11, outer cylinder 12, and connecting member 13 simultaneously may be used. Further, as the resin material, for example, only one type of resin material, a mixture containing two or more types of resin materials, or a mixture containing one or more types of resin materials and one or more types of elastomers may be used. Furthermore, additives such as an antioxidant, a plasticizer, a filler, or a pigment may be included. The resin material is preferably a thermoplastic resin. Note that the inner cylinder 11, the outer cylinder 12, and the connecting member 13 may be formed separately and assembled to each other.

[0033] Note that the wheel member 2 has a function of connecting the axle and the ring member 3, and the ring member 3 has a function of absorbing vibrations transmitted from the ground to the axle. Thus, since the wheel member 2 and the ring member 3 have different functions, they may be formed of different materials. For example, the ring member 3 may be formed of a material having a relatively small elastic modulus in order to ensure vibration absorption performance, and the wheel member 2 may be formed of a material having an elastic modulus larger than that of the ring member 3 in order to ensure robustness.

[0034] The ring member 3 of this embodiment is constituted by the above-described inner cylinder 11, outer cylinder 12, and connecting member 13, but is not limited to this configuration. The ring member 3 may further include other parts in addition to the inner cylinder 11, outer cylinder 12, and connecting member 13.

[0035] The spiral reinforcing layer 4 is formed by spirally winding a stranded body 20 in which one cord 21 or a plurality of parallel cords 21 are embedded in a covering 22 on the outer peripheral surface of the outer cylinder 12 of the ring member 3. In FIG. 3, as an example, a stranded body 20 in which only one cord 21 is embedded in the covering 22 is shown.

[0036] The elementary wire body 20 is spirally wound around the outer peripheral surface of the outer cylindrical body 12 as the outer peripheral surface of the ring member 3, so that the elementary wire bodies 20 are adjacent to each other in the tire width direction A on the outer peripheral surface of the outer cylindrical body 12. By integrally fixing the covering bodies 22 of the portions adjacent to each other in the tire width direction A in the elementary wire body 20 in the tire width direction A, a spiral reinforcing layer 4 is formed on the outer peripheral surface of the outer cylindrical body 12. The two-dot chain line in FIG. 3 shows the boundary between the covering bodies 22 before the covering bodies 22 are fixed for convenience of explanation. In other words, the spiral reinforcing layer 4 includes a base layer 4a formed by fixing the covering bodies 22 adjacent to each other in the tire width direction A, and one or more cords 21 spirally extending in the base layer 4a. The constituent material of the covering body 22 may be, for example, a resin material. Further, the covering body 22 may be formed of, for example, a rubber composition. Examples of the cord 21 include a steel cord and the like.

[0037] The spiral reinforcing layer 4 may be adhered to the outer peripheral surface of the outer cylindrical body 12 of the ring member 3 over the entire region in the tire circumferential direction B. The adhesion between the spiral reinforcing layer 4 and the outer cylindrical body 12 may be performed, for example, by welding the elementary wire body 20 forming the spiral reinforcing layer 4 to the outer peripheral surface of the outer cylindrical body 12. When the covering body 22 is formed of a rubber composition, the adhesion between the spiral reinforcing layer 4 and the outer cylindrical body 12 may also be performed by vulcanization adhesion.

[0038] In the non-pneumatic tire 1 of the present embodiment, since the spiral reinforcing layer 4 is provided, the rigidity of the outer cylindrical body 12 of the ring member 3 can be increased. Thereby, for example, even when the non-pneumatic tire 1 is used in an environment where the non-pneumatic tire 1 receives a large input from the road surface or the protrusions on the road surface pierce the tread member 5 of the non-pneumatic tire 1, the durability of the non-pneumatic tire 1 can be improved.

[0039] The tread member 5 surrounds the outside of the spiral reinforcing layer 4 in the tire diameter direction C. More specifically, the tread member 5 is formed in a cylindrical shape and covers the entire outer peripheral surface of the outer cylindrical body 12 of the ring member 3 on the outside in the tire diameter direction C from the outside of the spiral reinforcing layer 4 in the tire diameter direction C. The elastic modulus of the constituent material of the tread member 5 is smaller than the elastic modulus of the constituent material of the ring member 3. The outer peripheral surface on the outside in the tire diameter direction C of the tread member 5 is the tread surface 5a of the non-pneumatic tire 1. As shown in FIG. 3, the tread surface 5a of the tread member 5 may be a curved surface that bulges outward in the tire diameter direction C with the central side in the tire width direction A being more outward than both end sides.

[0040] The tread member 5 is formed of, for example, vulcanized rubber obtained by vulcanizing a rubber composition containing natural rubber or the like, or a thermoplastic material or the like. Examples of the thermoplastic material include thermoplastic elastomers and thermoplastic resins. Examples of the thermoplastic elastomer include amide-based thermoplastic elastomers (TPA), ester-based thermoplastic elastomers (TPC), olefin-based thermoplastic elastomers (TPO), styrene-based thermoplastic elastomers (TPS), urethane-based thermoplastic elastomers (TPU), thermoplastic rubber cross-linked bodies (TPV), and other thermoplastic elastomers (TPZ) defined in JIS K 6418. Examples of the thermoplastic resin include urethane resins, olefin resins, vinyl chloride resins, polyamide resins, and the like. From the viewpoint of wear resistance, it is preferable to form the tread member 5 of vulcanized rubber.

[0041] As shown in FIGS. 1 to 3, at least a part of the communication device 6 is disposed in a region where the spiral reinforcing layer 4 is located in the tire radial direction C. Specifically, as shown in FIG. 3, the communication device 6 is disposed at a position adjacent to the wire body 20 of the spiral reinforcing layer 4 in the tire width direction A. Further, as shown in FIG. 3, the communication device 6 is disposed adjacent to one end face 20a of the wire body 20 of the spiral reinforcing layer 4 in the tire circumferential direction B. Here, the phrase "disposed adjacent to" does not limit to the configuration where they are adjacent in a state of being in contact with each other, but also includes a configuration where they are spaced apart from each other and adjacent with a gap therebetween. Therefore, the communication device 6 may be disposed adjacent to one end face 20a of the wire body 20 of the spiral reinforcing layer 4 in the tire circumferential direction B with a gap, for example, 5 mm or less therebetween. In FIG. 3, the position of one end face 20a of the wire body 20 and the end face 21a of the cord 21 on this end face 20a are shown by broken lines. By disposing the communication device 6 in such a position, the periphery of the communication device 6 is protected by the ring member 3, the spiral reinforcing layer 4, and the tread member 5, and damage to the communication device 6 during vehicle travel can be suppressed. Note that, in FIG. 3, a coating member 36 described later for covering the communication device 6 has a predetermined shape and is disposed at the position shown in FIG. 3, but the configuration is not limited thereto. The communication device 6 may be, for example, configured to be embedded in the tread member 5 that flows and bulges inward in the tire radial direction C during vulcanization molding.

[0042] FIG. 4 is a diagram showing an RF tag as the communication device 6 of the present embodiment and a reader / writer 60 capable of wireless communication with this RF tag. As shown in FIG. 4, the communication device 6 of the present embodiment includes a storage unit 6a that stores information regarding the non-pneumatic tire 1, an antenna unit 6b capable of transmitting and receiving information with a reader / writer 60 located outside the non-pneumatic tire 1, and a control unit 6c capable of writing information to the storage unit 6a and reading information from the storage unit 6a, and may be a passive type RF tag. Specifically, the RF tag as the communication device 6 of the present embodiment can receive information transmitted on a radio wave or a magnetic field from the antenna unit 60a of the reader / writer 60 by the antenna unit 6b. Electric power is generated in the antenna unit 6b by rectification (in the case of a radio wave) or resonance (in the case of a magnetic field), and the storage unit 6a and the control unit 6c perform predetermined operations. For example, the control unit 6c reads the information in the storage unit 6a and returns (transmits) it from the antenna unit 6b to the reader / writer 60 on a radio wave or a magnetic field. The antenna unit 60a of the reader / writer 60 receives a radio wave or a magnetic field from the RF tag as the communication device 6 of the present embodiment. The control unit 60b of the reader / writer 60 can acquire the information stored in the storage unit 6a by taking out the received information. Note that the above-described storage unit 6a and control unit 6c can be configured by, for example, an integrated circuit (IC chip) including a non-volatile memory.

[0043] The information stored in the storage unit 6a of the RF tag as the communication device 6 of the present embodiment is not particularly limited. The storage unit 6a may be, for example, unique identification information of the non-pneumatic tire 1 that can identify each non-pneumatic tire, such as the manufacturer, manufacturing factory, and manufacturing date of the non-pneumatic tire 1. Further, tire history information such as the running distance, number of emergency brakings, number of sudden accelerations, and number of sharp turns of the non-pneumatic tire 1 may be stored in the storage unit 6a as information that can be rewritten by the reader / writer 60. Furthermore, for example, a sensor for detecting a tire acceleration or the like is attached to the non-pneumatic tire 1, and the storage unit 6a may store the detection information detected by the sensor. The RF tag as the communication device 6 can acquire the detection information of the sensor by wirelessly communicating with the sensor through the antenna unit 6b.

[0044] Note that the communication device 6 only needs to be configured to be capable of wireless communication with a predetermined device outside the non-pneumatic tire 1, and is not limited to the RF tag of the present embodiment.

[0045] FIGS. 5 and 6 are perspective views showing the RF tag as the communication device 6 of the present embodiment. As shown in FIG. 5, the RF tag as the communication device 6 of the present embodiment includes a first antenna 31 and a second antenna 32 that constitute the antenna unit 6b, and an IC chip 33 that constitutes a control unit 6c and a storage unit 6a and operates by the dielectric electromotive force generated by the radio waves received by the first antenna 31 and the second antenna 32, a plate-shaped support member 34 to which the IC chip 33 is attached, and a conductive conduction member 35 that electrically connects the IC chip 33 to the first antenna 31 and the second antenna 32, respectively. As shown in FIG. 5, the RF tag as the communication device 6 of the present embodiment includes long first antenna 31 and second antenna 32 that protrude from the IC chip 33 in opposite directions with the IC chip 33 interposed therebetween. Thus, the communication device 6 of the present embodiment has an elongated shape in which the longitudinal direction D of the first antenna 31 and the second antenna 32 is the longitudinal direction of the entire communication device 6. FIG. 6 is a perspective view showing a state in which the RF tag as the communication device 6 shown in FIG. 5 is covered with a covering member 36. The covering member 36 is formed of resin. In the present embodiment, as shown in FIG. 6, the RF tag as the communication device 6 in a state where the periphery is covered with the covering member 36 is disposed in a region where the spiral reinforcing layer 4 is located in the tire radial direction C.

[0046] Hereinafter, with reference to FIGS. 3 and 7, the details of the position and orientation where the communication device 6 is disposed will be described. FIG. 7 is a diagram showing the positional relationship in the tire circumferential direction B between the communication device 6 and one end face 20a of the wire body 20 of the spiral reinforcing layer 4.

[0047] As shown in FIG. 7, the communication device 6 is disposed adjacent to the end face 20a on one side of the wire body 20 in the tire circumferential direction B. In other words, as shown in FIGS. 3 and 7, the communication device 6 is disposed at a position overlapping with the end face 20a on one side of the wire body 20 in the tire circumferential direction B. As described above, the wire body 20 forming the spiral reinforcing layer 4 is spirally wound on the outer peripheral surface of the ring member 3 (the outer peripheral surface of the outer cylindrical body 12 in the present embodiment). Therefore, the wire body 20 is not disposed at positions adjacent to both end faces of the wire body 20 in the tire circumferential direction B, respectively. Therefore, spaces Z are formed at positions adjacent to both end faces of the wire body 20 in the tire circumferential direction B, respectively, which are surrounded by the spiral reinforcing layer 4 in the tire width direction A and the tire circumferential direction B, and are sandwiched between the outer peripheral surface of the ring member 3 and the tread member 5 in the tire radial direction C. The communication device 6 is disposed in this space Z. By disposing the communication device 6 in the space Z, the periphery of the communication device 6 is protected by the ring member 3, the spiral reinforcing layer 4, and the tread member 5, and damage to the communication device 6 during vehicle travel can be suppressed.

[0048] Note that the communication device 6 of the present embodiment is disposed adjacent to the end face 20a of the wire body 20 in the tire circumferential direction B, but may be disposed adjacent to the end face 20b on the opposite side of the wire body 20 in the tire circumferential direction B.

[0049] Further, as shown in FIGS. 3 and 7, in the present embodiment, the entire communication device 6 is located inside the outer end 20a1 of the end face 20a on one side of the wire body 20 in the tire width direction A. By doing so, since the communication device 6 does not protrude outside the end face 20a of the wire body 20 in the tire width direction A, damage to the communication device 6 due to an impact from the outside in the tire width direction A can be suppressed. In the present embodiment, as shown in FIG. 3, the covering member 36 covering the communication device 6 is located inside the outer end 20a1 of the end face 20a on one side of the wire body 20 in the tire width direction A. By doing so, damage to the communication device 6 due to an impact from the tire width direction A can be further suppressed.

[0050] Furthermore, as shown in FIG. 3, in the present embodiment, the entire communication device 6 is located inside the outer end 21a1 of the end face 21a of the cord 21 on one end face 20a of the core wire body 20 in the tire width direction A. By doing so, since the communication device 6 does not protrude outside the cord 21 of the core wire body 20 in the tire width direction A, it is possible to further suppress the communication device 6 from being damaged by an impact or the like from the outside in the tire width direction A.

[0051] Moreover, as shown in FIG. 3, in the present embodiment, the entire communication device 6 is located inside the outer end 20a2 in the tire diameter direction C of one end face 20a of the core wire body 20 in the tire diameter direction C. By doing so, since the communication device 6 does not protrude outside the end face 20a of the core wire body 20 in the tire diameter direction C, it is possible to suppress the communication device 6 from being damaged by an impact or the like from the outside in the tire diameter direction C via the tread member 5.

[0052] Also, as shown in FIG. 3, in the present embodiment, the entire communication device 6 is located inside the outer end 21a2 in the tire diameter direction C of the end face 21a of the cord 21 on one end face 20a of the core wire body 20 in the tire diameter direction C. By doing so, since the communication device 6 does not protrude outside the cord 21 of the core wire body 20 in the tire diameter direction C, it is possible to further suppress the communication device 6 from being damaged by an impact or the like from the outside in the tire diameter direction C.

[0053] Note that, as described above, the RF tag as the communication device 6 of the present embodiment has an elongated shape. Then, as shown in FIGS. 2, 3, and 7, the communication device 6 of the present embodiment is arranged such that its longitudinal direction (the same direction as the longitudinal direction D of the first antenna 31 and the second antenna 32 in the present embodiment, hereinafter referred to as the longitudinal direction D) follows the tire circumferential direction B. The ring member 3 receives a force from the road surface during vehicle travel and deforms in the tire radial direction C. At this time, the variation in the deformation amount in the tire radial direction C due to the position in the tire circumferential direction B is larger than the variation in the deformation amount in the tire radial direction C due to the position in the tire width direction A. Therefore, when the elongated communication device 6 is arranged such that the longitudinal direction D follows the tire circumferential direction B, stress concentrates on a part of the longitudinal direction D of the communication device 6, and deformation, damage, breakage, etc. are likely to occur locally. However, as described above, since the communication device 6 is arranged adjacent to the spiral reinforcing layer 4 in the space Z in the tire width direction A and the tire circumferential direction B, the deformation in the tire radial direction C is suppressed by the spiral reinforcing layer 4, and deformation, damage, breakage, etc. due to the above-described stress concentration can be suppressed. In other words, by arranging the communication device 6 in the above-described space Z, even if the communication device 6 is arranged such that the longitudinal direction D follows the tire circumferential direction B, a decrease in the durability of the communication device 6 can be suppressed.

[0054] The non-pneumatic tire according to the present invention is not limited to the specific configurations shown in the above-described embodiments and modifications, and various deformations, changes, and combinations are possible without departing from the scope of the claims.

[0055] [Contribution to the Sustainable Development Goals (SDGs) Led by the United Nations] Towards the realization of a sustainable society, the SDGs have been proposed. One embodiment of the present invention can be considered as a technology that contributes to "No. 12 - The responsibility to create, the responsibility to use" and "No. 13 - Specific measures for climate change".

Industrial Applicability

[0056] The present invention relates to a non-pneumatic tire.

Explanation of Signs

[0057] 1: Non-pneumatic tire 2: Wheel member 2a: Boss 2b: Mounting cylinder part 2c: Support cylinder part 2d: Spoke 3: Ring member 4: Spiral reinforcing layer 4a: Base layer 5: Tread member 5a: Tread surface 6: Communication device 6a: Memory part 6b: Antenna part 6c: Control part 11: Inner cylinder 12: Outer cylinder 13: Connecting member 13a: Outer end part of the connecting member 13b: Inner end part of the connecting member 20: Strand body 20a: One-side end face of the strand body 20a1: Outer end in the tire width direction of one-side end face of the strand body 20a2: Outer end in the tire diameter direction of one-side end face of the strand body 21: Cord 21a: End face of the cord at one-side end face of the strand body 21a1: Outer end in the tire width direction of the end face of the cord at one-side end face of the strand body 21a2: Outer end in the tire diameter direction of the end face of the cord at one-side end face of the strand body 22: Coating 31: First antenna 32: Second antenna 33: IC chip 34: Support member 35: Conductive member 36: Coating member 60: Reader / writer 60a: Antenna part 60b: Control part A: Tire width direction B: Tire circumferential direction C: Tire diameter direction D: Longitudinal direction of the communication device Z: Space CL: Tire equatorial plane O: Tire central axis

Claims

1. a wheel member attachable to an axle, a ring member mounted on the wheel member, a spiral reinforcing layer formed by spirally winding a single wire or a plurality of parallel wires embedded in a covering on the outer peripheral surface of the ring member, a tread member surrounding the outside of the spiral reinforcing layer in the tire diameter direction, and a communication device disposed adjacent to one end face of the wire body in the tire circumferential direction. A non-pneumatic tire comprising:

2. The non-pneumatic tire according to claim 1, wherein the entire communication device is located inside the outer end of one end face of the wire body in the tire width direction.

3. The non-pneumatic tire according to claim 2, wherein the entire communication device is located inside the outer end of the end face of the wire in one end face of the wire body in the tire width direction.

4. The non-pneumatic tire according to any one of claims 1 to 3, wherein the entire communication device is located inside the outer end in the tire diameter direction of one end face of the wire body in the tire diameter direction.

5. The non-pneumatic tire according to claim 4, wherein the entire communication device is located inside the outer end in the tire diameter direction of the end face of the wire in one end face of the wire body in the tire diameter direction.

6. The communication device has an elongated shape, The non-pneumatic tire according to any one of claims 1 to 3, wherein the longitudinal direction is arranged along the tire circumferential direction.

7. The ring member is an inner cylinder mounted on the wheel member, an outer cylinder surrounding the outside of the inner cylinder in the tire diameter direction, and a connecting member that connects the inner cylinder and the outer cylinder and is elastically deformable between the inner cylinder and the outer cylinder. The non-pneumatic tire according to any one of claims 1 to 3, wherein the spiral reinforcing layer is formed by spirally winding the wire body on the outer peripheral surface of the outer cylinder.

8. The non-pneumatic tire according to any one of claims 1 to 3, wherein the communication device is an RF tag. ​

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