JP2010149669A - Tube body, tire, and tire and rim assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress damage to a connecting part of a communication cylinder in a tube body. <P>SOLUTION: In the tube body 21 formed of a thermoplastic material and used by being attached to a rim 10, the communication cylinder 32 suitable for a support hole 31 formed in an outer circumferential part 12 of the rim 10 and making a compressed gas injection pipe 30 provided at the rim 10 communicated with an inner space A of the tube body 21 is protruded on the inner circumferential part supported by the outer circumferential part 12 of the rim 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tube body, a tire, and a tire / rim assembly.

In recent years, it has been proposed to employ a tube body formed of a thermoplastic material, for example, as shown in Patent Document 1 below, instead of a conventional tire.
International Publication No. 2004/037565 Pamphlet

However, since the compressed gas injection pipe is pierced and fixed to the side portion of the tube body, for example, when the internal pressure of the tube body rises, for example, during traveling, the connection with the compressed gas injection pipe in the tube body There was a problem that stress was easily concentrated on the portion.
Further, when the compressed gas injection pipe is fixed to the rim and pierced into the tube body, a large load is easily applied to the connection portion of the tube body with the compressed gas injection pipe due to the relative displacement between the tube body and the rim. There's a problem.

  The present invention has been made in view of such circumstances, and provides a tube body, a tire, and a tire / rim assembly that can suppress damage to a connection portion of the tube body with a compressed gas injection pipe. The purpose is to do.

In order to solve the above-described problems and achieve such an object, the tube body of the present invention is a tube body that is formed of a thermoplastic material and is used by being attached to a rim, and includes an outer peripheral portion of the rim. The inner peripheral portion supported by the outer periphery of the rim is fitted in a support hole formed in the outer peripheral portion of the rim, and communicates with the compressed gas injection pipe disposed in the rim and the inner space of the tube body. A communication tube is provided so as to protrude.
The tire of the present invention is a tire in which a tread is mounted on the outer periphery of the tube body, and the tube body is the tube body of the present invention.
Furthermore, the tire / rim assembly of the present invention is a tire / rim assembly in which a tire is mounted on a rim, wherein the tire is the tire of the present invention.

According to the present invention, the communication cylinder that communicates the internal space with the compressed gas injection pipe projects from the tube body, and the communication cylinder is fitted into the support hole of the rim. The displacement is restrained, and the relative displacement between the tube body and the rim can be suppressed, and the load acting on the connecting portion of the communicating cylinder in the tube body can be suppressed.
In the present invention, compared to a conventional tire with a tube, since a large load is applied to the tube body from the road surface, the relative displacement including the tire circumferential direction and the tire width direction of the tube body with respect to the rim and tread is sufficient. Therefore, the above-described effects can be achieved very effectively.

Here, a compressed gas injection pipe may be fitted into the communication cylinder.
In this case, since the compressed gas injection pipe is fitted in the communication cylinder, it is possible to suppress the displacement of the compressed gas injection pipe with respect to the tube body. Further, since the compressed gas injection pipe is fitted in the communication cylinder in this way, the communication cylinder can be sandwiched from the inside and the outside in the radial direction by the compressed gas injection pipe and the support hole. Become. Therefore, it can suppress reliably that the said connection part of a tube body is damaged.

  In addition, at the central portion in the tire width direction of the inner peripheral portion of the tube body, the communication tube and an annular plate extending in the tire circumferential direction are projected, and the rim is divided at the central portion in the tire width direction. The support rim portion may be formed by overlapping the split rims in the tire width direction, and the annular plate may be sandwiched in the tire width direction.

  In this case, since the annular plate is sandwiched and restrained in the tire width direction by both split rims, it is possible to suppress the deformation of the connecting portion of the tube body, and the occurrence of the above-described breakage. It can be suppressed more reliably. Further, since the rim is divided in the tire width direction, the rim can be easily attached to and detached from the rim without greatly deforming the tire.

Further, the annular plate is formed with a plurality of first engaging portions at intervals in the tire circumferential direction, and at least one of the two split rims at a portion sandwiching the annular plate in the tire width direction. A second engagement portion that engages with the first engagement portion may be formed.
In this case, since the second engagement portion is engaged with the first engagement portion formed on the annular plate of the tube body, the relative displacement along the tire circumferential direction between the rim and the tube body is prevented. It becomes possible to suppress reliably, and it can suppress more reliably the generation | occurrence | production of the above-mentioned damage.

In the tire of the present invention, a reinforcing layer may be provided on the tread.
In this case, the rigidity of the tire can be reliably maintained.

  According to this invention, it can suppress that the connection part of the communicating cylinder in a tube body is damaged.

Hereinafter, an embodiment of a tire / rim assembly according to the present invention will be described with reference to FIGS.
The tire / rim assembly 1 includes a rim 10 formed in a disk shape, and a tire 20 attached to a support portion (outer peripheral portion) 12 described later of the rim 10. Each is arranged coaxially with a common shaft extending along the tire width direction H.

  The rim 10 includes a disc-shaped rim main body 11 and a support portion 12 that is connected to the outer peripheral surface of the rim main body 11 and supports an inner peripheral portion of a tube body 21 described later. Further, a plurality of mounting holes 13 for assembling the rim 10 to an axle (not shown) are formed at the center of the rim body 11 in the tire radial direction.

  Here, both surfaces facing the inner side in the tire width direction H in the support portion 12 and a bottom surface connecting these surfaces, that is, the support surface 12a, are formed in an arc shape smoothly connected in a longitudinal sectional view along the tire width direction H. It is along the shape of the longitudinal sectional view in the inner peripheral part of the tube body 21. That is, both ends of the support portion 12 in the tire width direction H are support protrusions 12b that extend in the tire radial direction and support the tube body 21 from both sides in the tire width direction H. In the illustrated example, the support protrusion 12b gradually extends toward the outer side in the tire width direction H toward the outer side in the tire radial direction.

  In the present embodiment, the rim 10 can be divided into a disk-shaped first divided rim 14 and a ring-shaped second divided rim 15 at the center in the tire width direction H. Each of the divided rims 14 and 15 is gradually reduced in diameter from the outer side in the tire width direction H toward the center side. The mounting hole 13 is formed at the center of the flat plate portion 17 extending in the tire radial direction in the disc-shaped first divided rim 14 and facing the tire width direction H, and is attached to the axle. On the other hand, a ring-shaped second divided rim 15 is detachable.

On the outer peripheral portion of the flat plate portion 17 in the first divided rim 14, a plurality of lightening portions 17a are formed at intervals in the tire circumferential direction. The lightening portion 17a is formed in a long rectangular shape in plan view along the tire circumferential direction, and penetrates the flat plate portion 17 in the tire width direction H.
Further, among the surfaces facing the inner side in the tire width direction H in the outer peripheral portion of the flat plate portion 17, the outer peripheral edge portions 17 b connected to the respective cutout portions 17 a from the outer side in the tire radial direction are adjacent to each other in the tire circumferential direction. The intermediate portion 17c located between the light-emitting portions 17a and between the outer peripheral edge portions 17b is greatly recessed outside the other portion in the tire width direction H.

  Further, in the illustrated example, a portion (hereinafter referred to as a first engagement convex portion (second engagement portion)) 18 of the central portion in the tire circumferential direction in the outer peripheral edge portion 17b of the flat plate portion 17 excluding the outer peripheral edge. Protrudes inward in the tire width direction H. Further, a portion (hereinafter referred to as a second engagement convex portion (second engagement portion)) 19 excluding the outer peripheral edge of the intermediate portion 17c of the flat plate portion 17 also projects inward in the tire width direction H. In addition, each protrusion amount toward the inner side in the tire width direction H of the first engagement convex portion 18 and the second engagement convex portion 19 is directed toward the outer side in the tire width direction H of the outer peripheral edge portion 17b and the intermediate portion 17c. It is smaller than the amount of each depression.

A plurality of plate bodies 15a projecting inward in the tire radial direction are provided on the inner peripheral edge portion 15b of the ring-shaped second divided rim 15 at intervals in the tire circumferential direction. The inner peripheral edge 15b of the second divided rim 15 is formed in a flange shape that continuously extends over the entire circumference in the tire circumferential direction.
Here, the plate body 15a and the second engaging projections 19 of the first divided rim 14 are respectively the same shape and size, and the arrangement pitches thereof are equal to each other. Insertion holes 16 are formed in the plate body 15a and the second engagement convex portion 19, and the second divided rim 15 is formed by screwing nuts to bolts (not shown) inserted into these insertion holes 16. It is fixed to the first divided rim 14.

  Further, as shown in FIG. 3, a support hole portion 31 extending along the tire radial direction and opening to the thinned portion 17 a is formed in the center portion of the support surface 12 a in the tire width direction H. Yes. A compressed gas injection pipe 30 for injecting compressed gas into the internal space A of the tube body 21 is disposed in the support hole portion 31. That is, the compressed gas injection pipe 30 extends along the tire radial direction so as to open to the rim 10 at the center portion in the tire width direction H of the support surface 12a. A gap is provided between the inner peripheral surface of the outer portion 31 a located outside the tire radial direction in the support hole portion 31 and having an opening that opens to the support surface 12 a and the outer peripheral surface of the compressed gas injection pipe 30. It has been.

  Note that the inner end of the compressed gas injection pipe 30 in the tire radial direction protrudes into the thinned portion 17a. Also, support hole portions are formed in the outer peripheral edge portion 17b of the first divided rim 14 and the inner peripheral edge portion 15b of the second divided rim 15 so as to open in the tire width direction H and extend along the tire radial direction. Grooves are formed, and when the second divided rim 15 is attached to the first divided rim 14, the support hole portions 31 are formed by these support hole portion forming grooves.

The tire 20 includes a tube body 21 in which a positive gas pressure is applied to the internal space A, and a tread 22 formed in an endless belt shape. In addition, as gas with which the internal space A of the tube body 21 is filled, air, nitrogen gas, etc. are mentioned, for example.
The tube body 21 is detachably fitted to the support surface 12a of the rim 10 and the tread 22 in a state where the central portions in the tire width direction H of the rim 10, the tube body 21 and the tread 22 are made to coincide with each other. Are fitted and joined to the outer periphery of the tube body 21. Furthermore, the tube body 21 has an outer peripheral portion in close contact with the inner peripheral surface of the tread 22 and an inner peripheral portion in close contact with the support surface 12a of the rim 10 due to the positive gas pressure in the inner space A. It is fixed between the rim 10.

Here, the internal space A is an airtight space extending continuously over the entire circumference in the tire circumferential direction and having a circular shape in the longitudinal sectional view, and the tube body 21 is a hollow donut-shaped body. Yes. The internal space A can be maintained at a positive pressure by being filled with the compressed gas from the compressed gas injection pipe 30.
Further, as shown in FIGS. 2 and 3, both side portions 21a of the tube body 21 in the tire width direction H are not covered with the support surface 12a and the tread 22 of the rim 10 and are exposed to the outside. Of the inner peripheral portion of the tube body 21, the peripheral length along the tire width direction H of the portion covered with the support surface 12 a of the rim 10 and the outer peripheral portion of the tube body 21 covered with the tread 22. The circumferential length along the tire width direction H of the portion is the same. Thereby, the circumferential length along the tire radial direction of the both side portions 21a exposed to the outside in the tube body 21 is equal to each other.

  The tread 22 is made of natural rubber and / or vulcanized rubber obtained by vulcanizing a rubber composition. Further, a reinforcing layer 22a formed by arranging a plurality of steel cords or organic fibers is embedded in the tread 22 over the entire circumference. The tread 22 may be fitted and bonded to the outer peripheral portion of the tube body 21, or alternatively, the tread 22 may be vulcanized and bonded to the outer peripheral portion of the tube body 21 and formed integrally with the tube body 21. May be.

Further, in the present embodiment, the tube body 21 is formed of a thermoplastic material such as a thermoplastic elastomer or a thermoplastic resin. In consideration of elasticity at the time of traveling (riding comfort) and moldability at the time of manufacture, the tube body 21 is preferably formed of a thermoplastic elastomer.
Examples of the thermoplastic elastomer include an amide-based thermoplastic elastomer (TPA), an ester-based thermoplastic elastomer (TPC), an olefin-based thermoplastic elastomer (TPO), a styrene-based thermoplastic elastomer (TPS), and urethane as defined in JIS K6418. Examples thereof include a thermoplastic elastomer (TPU), a crosslinked thermoplastic rubber (TPV), and other thermoplastic elastomers (TPZ).
Examples of the thermoplastic resin include urethane resin, olefin resin, vinyl chloride resin, and polyamide resin.
Further, the thickness of the tube body 21 is, for example, about 0.5 mm to 5.0 mm, the gas pressure applied to the internal space A is, for example, about 50 kPa to 500 kPa, and the tire / rim assembly 1 is mounted as a vehicle. Examples include motorcycles in general and ordinary passenger cars having a total weight of less than 3 t.

If the tube body 21 is thinner than 0.5 mm, the pressure resistance and blade resistance may be insufficient. If it is thicker than 5.0 mm, the weight is increased or the tube body 21 is subjected to bending strain. When acting, there is a possibility that the difference in stress generated between the front surface side and the back surface side becomes large and the fatigue resistance deteriorates.
Further, when the gas pressure applied to the tube body 21 is lower than 50 kPa, the load supporting performance may be lowered, and when it is higher than 500 kPa, the riding comfort and the pressure resistance may be deteriorated.

  And in this embodiment, it fits into the clearance gap between the outer side part 31a of the support hole part 31, and the compressed gas injection pipe 30 by the inner peripheral part supported by the support part 12 of the rim | limb 10 in the tube body 21, In addition, a communication cylinder 32 that communicates between the compressed gas injection pipe 30 and the internal space A of the tube body 21 is projected. In the illustrated example, the communication cylinder 32 is formed integrally with the tube body 21. A compressed gas injection pipe 30 is fitted in the communication tube 32. Furthermore, the opening end surface on the outer side in the tire radial direction of the compressed gas injection pipe 30 is substantially flush with the inner peripheral surface defining the inner space A of the tube body 21 as shown in FIG.

  Furthermore, in the present embodiment, a communication cylinder 32 and an annular plate 33 that continuously extends over the entire circumference in the tire circumferential direction are provided in a projecting manner at the center in the tire width direction H at the inner circumferential portion of the tube body 21. In the illustrated example, the annular plate 33 is formed integrally with the tube body 21. The annular plate 33 is formed with a plurality of engagement holes (first engagement portions) 33a that open inward in the tire radial direction with a space in the tire circumferential direction. Each of the engagement holes 33a has a rectangular shape that is long in the tire circumferential direction, and a portion of the second engagement convex portion 19 that is located on the outer side in the tire radial direction from the thinned portion 17a and the first engagement convex portion 18. It has the same shape and size.

  Then, when the tube body 21 is attached to the first divided rim 14, as shown in FIG. 4, in the engagement hole 33 a of the annular plate 33, from the lightening portion 17 a of the second engagement convex portion 19. Also, the portion located outside in the tire radial direction and the first engagement convex portion 18 are fitted and engaged separately. At this time, the annular plate 33 protrudes slightly inward in the tire width direction H from the first and second engaging protrusions 18 and 19. Thus, when the second divided rim 15 is mounted on the first divided rim 14, the annular plate 33 is moved in the tire width direction by the flat plate portion 17 of the first divided rim 14 and the inner peripheral edge portion 15 b of the second divided rim 15. Compressed by H and sandwiched.

  Here, in the present embodiment, the tube body 21 is formed by joining two tube divided bodies divided at the central portion in the tire width direction H. In the illustrated example, an annular plate 33 that is divided in the tire width direction H and has a half thickness is provided on each of the inner peripheral portions of two tube divided bodies constituting the inner peripheral portion of the tube body 21. Thereby, the inner peripheral part of the tube body 21 is formed by joining the annular plate 33 divided | segmented into the tire width direction H of each of two tube division bodies, ie, surfaces are joined. . In the present embodiment, the split communication cylinders 32 are also provided on the inner peripheral portions of the two tube division bodies.

  Further, the central portion in the tire width direction H in the outer peripheral portion of the tube body 21 is formed in a cylindrical shape coaxial with the common shaft, and is a flat surface 21 c extending in parallel along the tire width direction H. The tube body 21 is divided at the center of the flat surface 21c in the tire width direction H. And while joining the division | segmentation edge in each outer peripheral part of two tube division bodies in the state of mutually abutting, the outer peripheral part of the tube body 21 is wound by joining the ribbon body 21b from the outer side of the tire radial direction. Is formed.

  As described above, according to the tire / rim assembly 1 according to the present embodiment, the tube 21 is provided with the communication cylinder 32 that communicates the internal space A with the compressed gas injection pipe 30. Is fitted in the support hole 31 of the rim 10, the displacement of the communication tube 32 relative to the rim 10 is restrained, and the relative displacement between the tube body 21 and the rim 10 can be suppressed. Thus, the load acting on the connecting portion of the communication cylinder 32 in the tube body 21 can be suppressed.

  Further, since the compressed gas injection pipe 30 is fitted in the communication tube 32, it is possible to suppress the displacement of the compressed gas injection pipe 30 with respect to the tube body 21. Further, since the compressed gas injection pipe 30 is fitted in the communication tube 32 in this way, the communication tube 32 is sandwiched from the inside and the outside in the radial direction by the compressed gas injection pipe 30 and the support hole portion 31. It becomes possible. Therefore, it can suppress reliably that the said connection part of the tube body 21 is damaged.

Further, since the annular plate 33 is sandwiched and restrained in the tire width direction H by the two divided rims 14 and 15, it is possible to suppress the deformation of the connecting portion of the tube body 21. Occurrence of damage can be more reliably suppressed. Furthermore, in the present embodiment, the annular plate 33 is compressed and sandwiched between the flat plate portion 17 of the first divided rim 14 and the inner peripheral edge portion 15b of the second divided rim 15 in the tire width direction H. The deformation of the connection portion 21 can be reliably suppressed.
Since the rim 10 is divided in the tire width direction H, the rim 10 can be easily attached to and detached from the rim 10 without greatly deforming the tire 20.

  Furthermore, in the engagement hole 33a of the annular plate 33, a portion of the second engagement convex portion 19 that is located on the outer side in the tire radial direction from the thinned portion 17a and the first engagement convex portion 18 are separately provided. Since it is fitted and engaged, it is possible to reliably suppress the relative displacement between the rim 10 and the tube body 21 along the tire circumferential direction, and to further suppress the occurrence of the aforementioned damage. can do.

In the tire 20 of the present embodiment, the tread 22 and the tube body 21 are configured, and the tube body 21 is formed of a thermoplastic material, and a reinforcing material having an organic fiber, a steel cord, or the like is embedded therein. Therefore, the structure can be simplified, the manufacturing cost can be reduced, and the weight can be reduced.
Further, as described above, since the reinforcing member is not embedded in the tube body 21 and the tube body 21 is formed of a thermoplastic material having high flexibility, the rim is assembled or unwound. The tube body 21 can be easily deformed without applying a strong force, and combined with the weight reduction as described above, improves the workability of rim assembly and rim unraveling. It is possible to prevent the tube body 21 from being damaged.
Moreover, in this embodiment, since the reinforcement layer 22a is provided in the tread 22, the fall of the rigidity of the tire 20 by having excluded the said reinforcing material can be suppressed reliably.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, although the reinforcing layer 22a is embedded in the tread 22, this reinforcing layer 22a may not be provided.
Furthermore, although the rim 10 is divided at the center portion in the tire width direction H, the division position may be appropriately changed or may not be divided as long as it is a midway position in the tire width direction H of the rim body 11. .
In the above embodiment, the communication tube 32 and the annular plate 33 are provided in the center portion in the tire width direction H in the inner peripheral portion of the tube body 21, but the tube body 21 supported by the support portion 12 of the rim 10. The position of the inner peripheral portion may be changed as appropriate.
Furthermore, without fitting the compressed gas injection pipe 30 into the communication cylinder 32, for example, the compressed gas injection pipe 30 and the communication cylinder 32 may be abutted or separated from each other in the support hole 31. Good. Note that fitting is preferable from the viewpoint of sealing performance.
Moreover, although the annular plate 33 is provided in the tube body 21, this annular plate 33 does not need to be provided.
Further, although the engagement hole 33a is formed in the annular plate 33, the engagement hole 33a may not be formed, or an engagement recess may be employed instead of the engagement hole 33a.
Moreover, although the 1st engagement convex part 18 and the 2nd engagement convex part 19 were provided in the flat plate part 17 of the 1st division | segmentation rim | 14, these engagement convex parts 18 and 19 do not need to be provided. An engagement convex portion that engages with the engagement hole 33a or the engagement concave portion may be provided in the two-divided rim 15.
Further, instead of the above embodiment, an engagement convex portion is formed on the annular plate 33, and an engagement concave portion or an engagement hole that engages the engagement convex portion on the first and second divided rims 14 and 15 is provided. It may be formed.
Moreover, in the said embodiment, although the structure which has not embed | buried reinforcement materials, such as a bead core and a belt layer which have organic fiber, a steel cord, etc. in the tube body 21 was shown, this reinforcement material was embed | buried in the tube body 21. May be.
Furthermore, the opening end surface on the outer side in the tire radial direction of the compressed gas injection pipe 30 may be positioned on the inner side in the tire radial direction with respect to the inner peripheral surface of the tube body 21 instead of the above embodiment. From the viewpoint of restraining the communication cylinder 32 by the injection pipe 30, it is preferable that the tube body 21 as shown in FIG. 3 is flush with the inner peripheral surface or protrudes into the internal space A from the inner peripheral surface.

Next, a verification test related to the above-described operation effect will be described.
As an example, the tire / rim assembly 1 shown in FIGS. 1 to 4 was employed.
As a conventional example, the tire / rim assembly 1 shown in FIGS. 1 to 4 does not have the communication cylinder 32 and the annular plate 33, and a flange portion projects from the tip instead of the compressed gas injection pipe 30. Adopting a compressed gas injection pipe, a tire / rim assembly in which the pipe is inserted into the rim and pierced into the tube body, and the flange portion is arranged on the inner peripheral surface defining the internal space in the tube body did.
And the maximum principal stress value which acts on the conditions which assumed driving | running | working in the part in which the compressed gas injection pipe is located in each tube body of these tire rim assemblies was computed by the finite element method.
As a result, it was confirmed that in the example, it was suppressed to about 1/10 of the conventional example.

  It can suppress that the connection part of the communicating cylinder in a tube body is damaged.

1 is an exploded perspective view of a tire / rim assembly shown as an embodiment according to the present invention. FIG. 2 is a perspective view showing a state where the tire / rim assembly shown in FIG. 1 is assembled. FIG. 3 is a perspective view showing a part of the tire / rim assembly shown in FIGS. 1 and 2 cut along a tire width direction. FIG. 4 is an enlarged view of a main part showing a state where a second divided rim is removed from the tire / rim assembly shown in FIGS. 1 to 3.

Explanation of symbols

1 Tire / rim assembly 10 Rim 12 Support (outer)
12a Support surface 12b Support protrusion 14 1st division | segmentation rim 15 2nd division | segmentation rim 18 1st engagement convex part (2nd engagement part)
19 2nd engagement convex part (2nd engagement part)
DESCRIPTION OF SYMBOLS 20 Tire 21 Tube body 22 Tread 22a Reinforcement layer 30 Compressed gas injection pipe 31 Support hole part 32 Communication pipe | tube 33 Ring plate 33a Engagement hole (1st engagement part)
A Internal space H Tire width direction

Claims (7)

A tube body formed of a thermoplastic material and used by being attached to a rim,
The inner peripheral portion supported by the outer peripheral portion of the rim is fitted into a support hole formed in the outer peripheral portion of the rim, and the compressed gas injection pipe disposed in the rim and the inside of the tube body A tube body, characterized in that a communication tube that communicates with a space is projected. A tire with a tread attached to the outer periphery of the tube body,
The tire according to claim 1, wherein the tube body is the tube body according to claim 1. The tire according to claim 2,
A tire characterized in that a reinforcing layer is provided on the tread. A tire / rim assembly in which a tire is mounted on a rim,
A tire / rim assembly, wherein the tire is the tire according to claim 2. The tire / rim assembly according to claim 4,
A tire / rim assembly, wherein a compressed gas injection pipe is fitted into the communication cylinder. The tire / rim assembly according to claim 4 or 5,
In the central part in the tire width direction in the inner peripheral part of the tube body, the communication tube, and an annular plate extending in the tire peripheral direction are projected,
The rim is constituted by a divided rim divided at a central portion in the tire width direction, and both the divided rims are overlapped in the tire width direction to form the support hole portion, and the annular plate A tire / rim assembly characterized by being sandwiched in the tire width direction. The tire / rim assembly according to claim 6,
In the annular plate, a plurality of first engaging portions are formed at intervals in the tire circumferential direction,
A tire is characterized in that a second engagement portion that engages with the first engagement portion is formed in a portion that sandwiches the annular plate in the tire width direction in at least one of the two divided rims. Rim assembly.

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