JP5789498B2 - Non pneumatic tire - Google Patents

Description

  The present invention relates to a non-pneumatic tire that does not need to be filled with pressurized air when used.

In a conventional pneumatic tire that is used while being filled with pressurized air, the occurrence of puncture is an unavoidable problem in structure.
In order to solve such problems, in recent years, for example, as shown in Patent Document 1 below, an attachment body attached to an axle, a ring-like body surrounding the attachment body from the outside in the tire radial direction, and an attachment body A plurality of members disposed between the ring-shaped body and the ring-shaped body, and a connecting member for relatively elastically displacing the attachment body and the ring-shaped body, and an outer peripheral surface of the ring-shaped body. A non-pneumatic tire is proposed that includes a tread member that is disposed on the side of the tire around the entire circumference.

JP 2011-156905 A

  By the way, in the conventional non-pneumatic tire, for example, it has been desired to improve visibility from the surroundings such as a pedestrian and an occupant of another vehicle.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the non-pneumatic tire which can improve the visibility from the circumference | surroundings.

In order to solve the above problems, the present invention proposes the following means.
The non-pneumatic tire according to the present invention includes a mounting body attached to an axle, a ring-shaped body surrounding the mounting body from the outside in the tire radial direction, and a tire circumferential direction between the mounting body and the ring-shaped body. And a plurality of connecting members for relatively elastically displacing the attachment body and the ring-shaped body, and disposed on the outer peripheral surface side of the ring-shaped body over the entire circumference thereof. A non-pneumatic tire comprising a tread member, and a body to be viewed whose surface is exposed to the outside is disposed on an outer peripheral surface of the tread member, and the surface of the body to be viewed is an outer periphery of the tread member. than the surface rather high reflection brightness, the conspicuity body, while being arranged on a wall surface defining said formed on the outer circumferential surface of the tread member groove, which is formed on a wall surface defining said groove arrangement Placed in the recess It is characterized in that is.

According to this invention, since the surface of the body to be viewed has higher reflection luminance than the outer peripheral surface of the tread member, visibility from the surroundings can be improved. This makes it possible to easily recognize the presence of a vehicle equipped with the non-pneumatic tire from the surroundings, for example, effectively preventing contact between the vehicle and surrounding pedestrians or other vehicles. Thus, it is possible to easily ensure good safety.
In addition, since the tread member is disposed on the outer peripheral surface side of the ring-shaped body over the entire circumference, it is possible to easily secure the surface area of the visible body disposed on the tread member. Can be easily improved.
Further, the connecting member connects the attachment body and the ring-shaped body so as to be relatively elastically displaceable, and the tread member is disposed on the outer peripheral surface side of the ring-shaped body, and the tread member is connected to the mounting body and the ring. Since the deformation is performed while displacing following the elastic displacement relative to the shape body, the deformation amount of the tread member is suppressed. Thereby, it becomes possible to make it difficult to detach | leave a to-be-viewed body from a tread member, and visibility can be improved reliably.

In addition, since the object to be viewed is disposed on the wall surface that defines the groove portion, it is possible to make it difficult for the object to be in contact with the road surface during traveling, and to further separate the object to be viewed from the tread member. Can be difficult.
In addition, since the visible body is disposed in the arrangement recess, it is possible to suppress a decrease in the volume of the groove due to the provision of the visible body, for example, the non-pneumatic It is possible to easily ensure the drainage of the tire.

  Moreover, the said to-be-viewed body may be arrange | positioned by the bottom wall surface which faces the outer side of a tire radial direction among the wall surfaces which define the said groove part.

In this case, since the visible body is disposed on the bottom wall surface, the visible body can be easily seen from the traveling direction of the non-pneumatic tire, and visibility from the surroundings can be reliably ensured. Can be improved.
Here, since the bottom wall surface is less likely to be distorted and deformed during travel as compared with the side wall surface rising from the bottom wall surface among the wall surfaces defining the groove portion, the object to be viewed is arranged on the bottom wall surface as described above. By being provided, it is possible to make it difficult to separate the visible body from the tread member.

  Further, the object to be visually recognized is formed in a sheet shape in which a back surface opposite to the front surface is fixed to a bottom surface facing the opening direction of the arrangement recess, among the wall surfaces defining the arrangement recess. May be formed in the same shape and the same size as the arrangement recess in a front view seen from the opening direction.

  In this case, since the visible body is formed in the same shape and size as the arrangement recess in the front view, for example, when the water flows in the groove, the visible body receives water pressure from the outer peripheral edge thereof. It becomes possible to make it easy to suppress the object, and it is possible to make it difficult to separate the visible body from the tread member.

  In addition, a plurality of the visible bodies are arranged on the outer circumferential surface of the tread member in the tire circumferential direction, and among the visible bodies adjacent to each other in the tire circumferential direction, circumferential end portions in the tire circumferential direction are tire widths. They may be displaced from each other in the direction and overlap each other in the tire circumferential direction.

In this case, since the circumferential end portions in the tire circumferential direction are displaced from each other in the tire width direction and overlap each other in the tire circumferential direction among the objects to be viewed adjacent to each other in the tire circumferential direction, the outer circumferential surface of the tread member It becomes possible to arrange | position a to-be-viewed body continuously in a tire peripheral direction, and can improve visibility more reliably.
In addition, since a plurality of objects to be viewed are arranged in the tire circumferential direction on the outer peripheral surface of the tread member, even if a part of the plurality of objects to be viewed is detached, It becomes possible to make it easy to ensure visibility, for example, compared to the case where one visible body is continuously disposed in the tire circumferential direction over the same range as these multiple visible bodies, Visibility can be easily secured.

  According to the non-pneumatic tire according to the present invention, visibility from the surroundings can be improved.

In one Embodiment which concerns on this invention, it is the schematic perspective view which decomposed | disassembled some non-pneumatic tires. It is the tire side view which looked at the non-pneumatic tire shown in FIG. 1 from the one side of the tire width direction. FIG. 3 is a plan view of the first divided case body of the non-pneumatic tire shown in FIG. 1 viewed from one side in the tire width direction, or a plan view of the second divided case body viewed from the other side in the tire width direction. It is an enlarged view which shows the principal part of FIG. It is a tire top view of the tread member which constitutes the non-pneumatic tire shown in FIG. In other embodiment which concerns on this invention, it is a tire top view of the tread member which comprises a non-pneumatic tire.

Hereinafter, an embodiment of a non-pneumatic tire according to the present invention will be described with reference to FIGS. 1 to 4. The non-pneumatic tire 1 may be employed in a small vehicle that travels at a low speed, such as a handle-type electric wheelchair defined in JIS T 9208, for example.
The non-pneumatic tire 1 includes a mounting body 11 attached to an axle (not shown), a ring-shaped body 13 surrounding the mounting body 11 from the outside in the tire radial direction, and a tire between the mounting body 11 and the ring-shaped body 13. A plurality of members are arranged along the circumferential direction, and a connecting member 15 that connects the attachment body 11 and the ring-shaped body 13 so as to be relatively elastically displaceable. And a tread member 16 disposed over the entire surface.

  Here, the attachment body 11, the ring-shaped body 13, and the tread member 16 are each arranged coaxially with the common shaft. Hereinafter, the common axis is referred to as an axis O, a direction along the axis O is referred to as a tire width direction H, a direction orthogonal to the axis O is referred to as a tire radial direction, and a direction around the axis O is a tire circumference. It is called direction. In addition, the attachment body 11, the ring-shaped body 13, and the tread member 16 are disposed such that the center portions in the tire width direction H are aligned with each other.

As shown in FIGS. 1 and 2, the attachment body 11 includes a mounting cylinder portion 17 to which the front end portion of the axle is mounted, an outer ring portion 18 that surrounds the mounting cylinder portion 17 from the outside in the tire radial direction, And a plurality of ribs 19 that connect the mounting cylinder portion 17 and the outer ring portion 18.
The mounting cylinder portion 17, the outer ring portion 18, and the rib 19 are integrally formed of a metal material such as an aluminum alloy. The mounting cylinder portion 17 and the outer ring portion 18 are each formed in a cylindrical shape and arranged coaxially with the axis O. The plurality of ribs 19 are arranged point-symmetrically with respect to the axis O.

A plurality of key groove portions 18a that are recessed toward the inside in the tire radial direction and that extend in the tire width direction H are formed on the outer peripheral surface of the outer ring portion 18 at intervals in the tire circumferential direction. The key groove portion 18 a is opened only on one side of both ends in the tire width direction H on the outer peripheral surface of the outer ring portion 18, and the other side is closed.
In the outer ring portion 18, a plurality of hollow holes penetrating in the tire radial direction are arranged at intervals in the tire width direction H in a portion located between the key groove portions 18 a adjacent in the tire circumferential direction. A plurality of hole rows 18c are formed at intervals in the tire circumferential direction. The rib 19 is also formed with a hole 19a penetrating in the tire width direction H.

  In addition, a concave portion 18b that is recessed toward the other side in the tire width direction H and into which the plate material 28 is fitted is formed at the edge corresponding to the key groove portion 18a at one end edge in the tire width direction H of the outer ring portion 18. Has been. A through hole is formed in the plate member 28, and a female screw communicating with the through hole of the plate member 28 fitted in the recess 18b on a wall surface facing the one side in the tire width direction H among the wall surfaces defining the recess 18b. The part is formed. A plurality of these internal thread portions and through holes are formed at intervals in the tire circumferential direction.

  A cylindrical exterior body 12 is externally fitted to the attachment body 11. On the inner peripheral surface of the exterior body 12, a plurality of protrusions 12a that protrude toward the inner side in the tire radial direction and extend over the entire length in the tire width direction H are disposed at intervals in the tire circumferential direction. These protrusions 12 a are fitted into the key groove portions 18 a of the attachment body 11. The exterior body 12 is fixed to the attachment body 11 by screwing a bolt into the female thread portion through the through hole of the plate member 28 fitted in the recess 18b in a state where the protrusion 12a is fitted in the key groove portion 18a. ing. In this state, the protruding portion 12a is formed in the tire width direction H by the plate member 28 and the other wall surface facing the one side located at the other end in the tire width direction H among the wall surfaces defining the recess 18b. It is sandwiched.

Of the wall surfaces defining the key groove portion 18a, the pair of side wall surfaces and the bottom wall surface facing each other in the tire circumferential direction form a right angle. Moreover, a pair of side wall surfaces which stand up from the inner peripheral surface of the exterior body 12 and the top wall surface which faces the inner side in the tire radial direction out of the outer surface of the protruding portion 12a form a right angle. Furthermore, the size of the protrusion 12a and the key groove 18a in the tire circumferential direction is equal to each other.
Further, the ring-shaped body 13 is larger in size in the tire width direction H than the exterior body 12, that is, the width is larger. In the example shown in the figure, the ring-shaped body 13 is formed in a cylindrical shape.

The connecting member 15 connects the outer peripheral surface side of the attachment body 11 and the inner peripheral surface side of the ring-shaped body 13. In the illustrated example, the connecting member 15 is connected to the outer peripheral surface of the exterior body 12 and the ring-shaped body 13. The 1st elastic connection board 21 and the 2nd elastic connection board 22 which mutually connect with the inner peripheral surface are provided.
The connecting member 15 includes a plurality of first elastic connecting plates 21 arranged along the tire circumferential direction at a position in one tire width direction H, and the second elastic connecting plate 22 is a position in the one tire width direction H. A plurality (60 in the illustrated example) are provided along the tire circumferential direction so that a plurality of different tire width directions H are arranged along the tire circumferential direction.
That is, the plurality of first elastic connecting plates 21 are arranged at the same position in the tire width direction H along the tire circumferential direction, and the plurality of second elastic connecting plates 22 are separated from the first elastic connecting plate 21. A plurality of tires are arranged along the tire circumferential direction at the same position in the tire width direction H that is separated in the tire width direction H.

Note that the plurality of connecting members 15 are separately disposed between the exterior body 12 and the ring-shaped body 13 at positions that are point-symmetric with respect to the axis O. All the connecting members 15 have the same shape and size. Further, the width of the connecting member 15 is smaller than the width of the ring-shaped body 13.
The first elastic coupling plates 21 adjacent in the tire circumferential direction are not in contact with each other, and the second elastic coupling plates 22 adjacent in the tire circumferential direction are also in non-contact with each other. Further, the first elastic connecting plate 21 and the second elastic connecting plate 22 adjacent in the tire width direction H are also not in contact with each other.
In addition, the width | variety of each of the 1st elastic connection board 21 and the 2nd elastic connection board 22 is mutually equal. The thicknesses of the first elastic connecting plate 21 and the second elastic connecting plate 22 are also equal to each other.

Here, in the first elastic connecting plate 21, one end 21a connected to the ring-shaped body 13 is located on one side in the tire circumferential direction with respect to the other end 21b connected to the exterior body 12, and the second Of the elastic connecting plate 22, one end 22 a connected to the ring-shaped body 13 is located on the other side in the tire circumferential direction with respect to the other end 22 b connected to the exterior body 12.
Further, the one end portions 21 a and 22 a of the first elastic connecting plate 21 and the second elastic connecting plate 22 in one connecting member 15 are made to have different positions in the tire width direction H on the inner peripheral surface of the ring-shaped body 13. And are connected to the same position in the tire circumferential direction.

  In the illustrated example, in each of the first elastic connecting plate 21 and the second elastic connecting plate 22, intermediate portions 21c and 22c positioned between the one end portions 21a and 22a and the other end portions 21b and 22b are arranged in the tire circumferential direction. A plurality of curved portions 21d to 21f and 22d to 22f that are curved are formed along the direction in which the connecting plates 21 and 22 extend in a side view of the tire 1 when the tire 1 is viewed from the tire width direction H. In each of the connecting plates 21 and 22, among the plurality of bending portions 21d to 21f and 22d to 22f, the bending directions of the bending portions 21d to 21f and 22d to 22f adjacent to each other in the extending direction are opposite to each other. It has become.

The plurality of curved portions 21d to 21f formed on the first elastic connecting plate 21 are a first curved portion 21d curved so as to protrude toward the other side in the tire circumferential direction, a first curved portion 21d, and one end portion. 21a and a second curved portion 21e curved so as to project toward one side in the tire circumferential direction, and located between the first curved portion 21d and the other end 21b and the tire circumference And a third bending portion 21f that is curved so as to project toward one side of the direction.
The plurality of curved portions 22d to 22f formed on the second elastic connecting plate 22 are a first curved portion 22d curved so as to project toward one side in the tire circumferential direction, a first curved portion 22d, and one end portion. 22a and the second curved portion 22e curved so as to protrude toward the other side in the tire circumferential direction, and located between the first curved portion 22d and the other end 22b and the tire circumference And a third curved portion 22f curved so as to project toward the other side of the direction.
In the illustrated example, the first bending portions 21d and 22d have a larger radius of curvature in the tire side view than the second bending portions 21e and 22e and the third bending portions 21f and 22f. The first curved portions 21d and 22d are disposed at the center of the first elastic connecting plate 21 and the second elastic connecting plate 22 in the extending direction.

  Further, the lengths of the two elastic connecting plates 21 and 22 are equal to each other, and the other end portions 21b and 22b of the two elastic connecting plates 21 and 22 are, as shown in FIG. Thus, the same angle (for example, 20 ° or more and 135 °) on one side and the other side in the tire circumferential direction centering on the axis O from the position facing the one end portions 21a, 22a in the tire radial direction on the outer peripheral surface of the exterior body 12. It is connected to each position separated by degrees. Further, the first bending portions 21d and 22d, the second bending portions 21e and 22e, and the third bending portions 21f and 22f of the first elastic connecting plate 21 and the second elastic connecting plate 22 are mutually in the tire circumferential direction. The opposite direction is the same and the size is the same.

Thereby, the shape of each connecting member 15 in the side view of the tire extends along the tire radial direction and passes through the one end portions 21a and 22a of both connecting plates 21 and 22, as shown in FIG. The line is symmetrical with respect to the virtual line L.
Further, in each of the elastic connecting plates 21 and 22, the one end side portion extending from the central portion in the extending direction to the one end portions 21a and 22a is more than the other end side portion extending from the central portion to the other end portions 21b and 22b. The thickness is increased. Thereby, while suppressing the increase in the weight of the connecting member 15 and ensuring the flexibility of the connecting member 15, the strength of the one end side portion where a large load is easily applied to the first and second elastic connecting plates 21 and 22 is increased. Can be increased. In addition, these one end side parts and other end side parts are smoothly connected without a level | step difference.

Here, in the present embodiment, the exterior body 12, the ring-shaped body 13, and the plurality of connecting members 15 are integrally formed.
Furthermore, in the present embodiment, the exterior body 12 is divided into a one-side divided exterior body 25 located on one side in the tire width direction H and a second-side divided exterior body 26 located on the other side in the tire width direction H. ing. Further, as shown in FIG. 1, the ring-shaped body 13 includes a one-side divided ring-shaped body 23 located on one side in the tire width direction H and a second-side divided ring shape located on the other side in the tire width direction H. The body 24 is divided. In the illustrated example, the exterior body 12 and the ring-shaped body 13 are each divided at the center in the tire width direction H.

The one-side split exterior body 25 and the one-side split ring-shaped body 23 are formed integrally with the first elastic connecting plate 21, and the other-side split exterior body 26 and the other-side split ring-shaped body 24 are second elastically connected. It is formed integrally with the plate 22.
Furthermore, in this embodiment, the one side division | segmentation exterior body 25, the one side division | segmentation ring-shaped body 23, and the 1st elastic connection board 21, and the other side division | segmentation exterior body 26, the other side division | segmentation ring-shaped body 24, and the 2nd elastic connection board 22 are carried out. Are integrally formed by casting or injection molding.
Hereinafter, the one-side divided outer body 25, the one-side divided ring-shaped body 23, and the first elastic connecting plate 21 are integrally formed as a first divided case body 31, the other-side divided outer body 26, and the other-side divided body. A structure in which the ring-shaped body 24 and the second elastic connecting plate 22 are integrally formed is referred to as a second divided case body 32.

Here, the injection molding may be a general method in which the entire first and second divided case bodies 31 and 32 are simultaneously molded separately, or the first and second divided case bodies 31 and 32. In each, the one side and the other side split outer casings 25 and 26, the one side and the other side split ring bodies 23 and 24, and a part of the first and second elastic connecting plates 21 and 22 remain as inserts. Insert molding for injection molding may be used, or so-called two-color molding or the like may be used.
Further, in each of the first and second divided case bodies 31 and 32, the one side and the other side divided exterior bodies 25 and 26, the one side and the other side divided ring bodies 23 and 24, and the first and second elastic couplings. The plates 21 and 22 may be formed of different materials or the same material. Examples of this material include a metal material and a resin material, but a resin material, particularly a thermoplastic resin is preferable from the viewpoint of weight reduction.
When the entire first and second divided case bodies 31 and 32 are simultaneously injection-molded separately, a plurality of protrusions 12a formed on the exterior body 12 may be used as gate portions.

  In each of the first and second divided case bodies 31 and 32, the center portion of the first and second elastic connecting plates 21 and 22 in the tire width direction H, the center portion of the ring-shaped body 13 in the tire width direction H, and the exterior The center portion of the body 12 in the tire width direction H coincides with each other, the exterior body 12 has a width smaller than that of the ring-shaped body 13, and the widths of the first elastic connection plate 21 and the second elastic connection plate 22. It is equivalent.

And the edge of the tire width direction H of each of the one-side divided ring-shaped body 23 and the other-side divided ring-shaped body 24 is connected by, for example, welding, fusion, or adhesion. Of these, in the case of welding, for example, hot plate welding or the like may be employed.
Further, the edges in the tire width direction H of the one-side divided outer package 25 and the other-side divided outer package 26 are separated from each other in the tire width direction H. Thereby, it is prevented that a burr | flash arises in the internal peripheral surface of the exterior body 12 externally fitted by the attachment body 11. FIG.

Further, the first divided case body 31 and the second divided case body 32 have the same shape and the same size as shown in FIG. 3 in a state before the connection of the 31, 32 as described above.
And when connecting as described above, each connecting member 15 in the tire circumferential direction of each of the first divided case body 31 and the second divided case body 32 is line-symmetric as described above in the tire side view. While aligning the positions of the ring-shaped bodies 13 of the first divided case body 31 and the second divided case body 32, the two divided case bodies 31, 32 are oriented in the tire width direction H opposite to each other. The ends in the tire width direction H are butted together and connected.

  The tread member 16 is formed in a cylindrical shape, and integrally covers the outer peripheral surface side of the ring-shaped body 13 over the entire region. In the illustrated example, the inner peripheral surface of the tread member 16 extends over the entire region and the outer peripheral surface of the ring-shaped body 13. Close to. The tread member 16 is made of, for example, vulcanized rubber obtained by vulcanizing natural rubber and / or a rubber composition, or a thermoplastic material. Examples of the thermoplastic material include a thermoplastic elastomer or a thermoplastic resin. Examples of the thermoplastic elastomer include amide-based thermoplastic elastomer (TPA), ester-based thermoplastic elastomer (TPC), olefin-based thermoplastic elastomer (TPO), 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. From the viewpoint of wear resistance, it is preferable to form the tread member 16 from vulcanized rubber.

  Further, as shown in FIG. 5, a groove portion 42 that partitions the land portion 41 is formed on the outer peripheral surface of the tread member 16. The groove portions 42 gradually extend from the other side in the tire circumferential direction toward the one side in the tire width direction H from the one side to the other side, and a plurality of the groove portions 42 are arranged at intervals in the tire circumferential direction.

One end portion 42a on one side in the tire width direction H in the groove portion 42 opens at one end edge in the tire width direction H in the tread member 16, and the other end portion 42b on the other side in the tire width direction H in the groove portion 42. Is open at the end of the tread member 16 on the other side in the tire width direction H. Further, the one end portion 42a of the groove portion 42 is shifted to the other side in the tire circumferential direction with respect to the central portion 42c located between the one end portion 42a and the other end portion 42b in the groove portion 42, and the groove portion 42. The other end portion 42b is shifted to one side in the tire circumferential direction with respect to the central portion 42c of the groove portion 42.
A connection portion (hereinafter referred to as a first connection portion) 42d between the one end portion 42a and the central portion 42c in the groove portion 42 is narrower than the one end portion 42a and the central portion 42c. A connection part (hereinafter referred to as a second connection part) 42e between the end part 42b and the central part 42c is narrower than the other end part 42b and the central part 42c.

The connection end 45a connected to the first connection portion 42d in the one end portion 42a of the groove portion 42 has a side wall surface facing one side in the tire circumferential direction among the wall surfaces defining the connection end 45a, in the tire width direction H. By projecting toward one side, the width gradually decreases toward the first connection portion 42d. Further, the connecting end 45b connected to the first connecting portion 42d in the central portion 42c of the groove portion 42 has a side wall surface facing the other side in the tire circumferential direction among the wall surfaces defining the connecting end 45b, in the tire width direction. By projecting toward the other side of H, the width gradually decreases toward the first connecting portion 42d.
In the illustrated example, of the wall surfaces defining the one end portion 42a of the groove portion 42, the side wall surface facing one side in the tire circumferential direction is a tire plan view when the non-pneumatic tire 1 is viewed from the outside in the tire radial direction. In FIG. 2, a curved shape that protrudes toward the other side in the tire width direction H is formed. Of the wall surfaces defining the central portion 42c of the groove portion 42, the central portion of the non-pneumatic tire 1 in the tire width direction H (hereinafter referred to as the tire equator portion CL) is formed on the side wall surface facing the other side in the tire circumferential direction. ) Has a curved shape that protrudes toward one side in the tire width direction H in the tire plan view.

Further, the connecting end 45c connected to the second connecting portion 42e at the other end portion 42b of the groove portion 42 has a side wall surface facing the other side in the tire circumferential direction among the wall surfaces defining the connecting end 45c. By projecting toward the other side in the direction H, the width gradually decreases toward the second connection portion 42e. Further, the connection end 45d connected to the second connection portion 42e in the central portion 42c of the groove portion 42 has a side wall surface facing one side in the tire circumferential direction among the wall surfaces defining the connection end 45d, in the tire width direction. By projecting toward one side of H, the width gradually decreases toward the second connecting portion 42e.
In the illustrated example, among the wall surfaces defining the other end portion 42b of the groove portion 42, the side wall surface facing the other side in the tire circumferential direction protrudes toward one side in the tire width direction H in the tire plan view. It has a curved shape. Of the wall surfaces defining the central portion 42c of the groove portion 42, on the side wall surface facing one side in the tire circumferential direction, the other side portion located on the other side in the tire width direction H with respect to the tire equator portion CL is In the tire plan view, it has a curved shape that protrudes toward the other side in the tire width direction H.

Here, the center portion 42c of the groove portion 42 in the tire width direction H crosses the tire equator portion CL in the tire width direction H, and the groove portion 42 is a symmetrical center C1 on the tire equator portion CL in the tire plan view. It is point-symmetric with respect to. The plurality of groove portions 42 are formed in the same shape and size, and the groove portions 42 adjacent to each other in the tire circumferential direction are not open to each other.
And between the groove parts 42 adjacent to each other in the tire circumferential direction, among the wall surfaces defining the central part 42c in the groove part 42 located on the other side in the tire circumferential direction, the one side part and one side in the tire circumferential direction are located. Of the wall surfaces defining the one end portion 42a of the groove portion 42, the side wall surface facing one side in the tire circumferential direction is adjacent to the tire width direction H. Further, of the wall surfaces defining the other end portion 42b of the groove portion 42 located on the other side in the tire circumferential direction, the side wall surface facing the other side in the tire circumferential direction and the groove portion 42 located on one side in the tire circumferential direction. Of the wall surfaces defining the central portion 42 c, the other side portion is adjacent to the tire width direction H.

  And in the tread member 16, the said land part 41 is divided between the groove parts 42 adjacent to a tire circumferential direction, and this land part 41 is one end part among the groove parts 42 adjacent to a tire circumferential direction. One side small land part 41a located between 42a, the other side small land part 41b located between the other end parts 42b, and the central small land part 41c located between the central parts 42c, I have. Furthermore, the one side land 41a and the center land 41c are connected by a first connection land 41d that is narrower than both these land portions, and the other side land 41b and the center land 41c. The portion 41c is connected by a second connecting land portion 41e that is narrower than both these small land portions, and the land portion 41 includes the one side small land portion 41a, the other side small land portion 41b, The central small land portion 41c, the first connection small land portion 41d, and the second connection small land portion 41e are integrally connected.

Here, on the outer peripheral surface of the tread member 16, a visible body 43 whose surface is exposed to the outside is disposed. The visible body 43 is disposed on the tire equator portion CL over the entire length in the tire circumferential direction. In the illustrated example, a plurality of the visible bodies 43 are disposed on the outer peripheral surface of the tread member 16 in the tire circumferential direction, and among the visible bodies 43 adjacent to each other in the tire circumferential direction, a circumferential end portion in the tire circumferential direction. The objects to be visually recognized 43 are continuously disposed over the entire length in the tire circumferential direction by being shifted in the tire width direction H and overlapping each other in the tire circumferential direction.
The visible body 43 extends in the tire circumferential direction so as to be inclined with respect to the tire equator CL in the tire plan view, and the length L along the tire circumferential direction of the visible body 43 is, for example, It may be about 35% or less of the total length of the tread member 16 along the tire circumferential direction.

Further, in the present embodiment, the visible body 43 is disposed on the wall surface that defines the groove 42. The visible body 43 is disposed on the bottom wall surface facing the outer side in the tire radial direction among the wall surfaces defining the groove portion 42, and the surface of the visible body 43 faces the outer side in the tire radial direction. In the example shown in the figure, the body 43 to be visually recognized is disposed on the bottom wall surface of the central portion 42c of the groove 42, and the outer peripheral edge of the body 43 to be viewed is the center of the central portion 42c of the groove 42 in the tire plan view. It extends along the inner peripheral edge of the bottom wall surface.
Further, the visually-recognized body 43 is disposed in a placement recess 44 that is formed on the bottom wall surface that defines the groove portion 42 and opens toward the outer side in the tire radial direction (opening direction of the placement recess). The to-be-viewed body 43 is formed in a sheet shape in which the back surface opposite to the front surface is fixed to the bottom surface (not shown) facing the outer side in the tire radial direction among the wall surfaces defining the arrangement recess 44. And the to-be-viewed body 43 is formed in the same shape and size as the arrangement | positioning recessed part 44 in the said tire planar view (front view seen from the opening direction), and the outer periphery of the to-be-viewed body 43 and the inner periphery of the arrangement | positioning recessed part 44 Are in contact with each other over the entire circumference.

The visible body 43 is fixed to the bottom surface of the placement recess 44 by, for example, adhesion, and the surface of the visible body 43 is flush with the bottom wall surface of the groove 42. The adhesion may be, for example, vulcanization adhesion or adhesion with an adhesive, and this adhesion may be performed at the time of vulcanization molding of the tread member 16, and the tread member 16 and the object to be viewed 43 are connected. You may carry out after forming separately.
In the present embodiment, the surface of the body 43 to be visually recognized has higher reflection luminance than the outer peripheral surface of the tread member 16.

As described above, according to the non-pneumatic tire 1 according to the present embodiment, the surface of the body 43 to be viewed has higher reflection luminance than the outer peripheral surface of the tread member 16, thereby improving visibility from the surroundings. Can do. As a result, it becomes possible to easily recognize the presence of the vehicle on which the non-pneumatic tire 1 is mounted from the surroundings, for example, effectively preventing contact between the vehicle and the surrounding pedestrians or other vehicles. Therefore, it is possible to easily ensure good safety.
Further, since the tread member 16 is disposed on the outer peripheral surface side of the ring-shaped body 13 over the entire circumference thereof, it is possible to easily ensure the surface area of the visually-recognized body 43 disposed on the tread member 16. Thus, the visibility can be easily improved.
Further, the connecting member 15 connects the attachment body 11 and the ring-shaped body 13 so as to be relatively elastically displaceable, and the tread member 16 is disposed on the outer peripheral surface side of the ring-shaped body 13. However, since it deforms while displacing following the relative elastic displacement between the attachment body 11 and the ring-shaped body 13, the amount of deformation of the tread member 16 is suppressed. Thereby, it becomes possible to make it difficult to remove the to-be-viewed body 43 from the tread member 16, and the visibility can be improved reliably.

  Moreover, in this embodiment, since the inner peripheral surface of the tread member 16 is in close contact with the outer peripheral surface of the ring-shaped body 13 over the entire area, the tread member 16 is supported by the ring-shaped body 13 from the inner side in the tire radial direction. Accordingly, it is possible to suppress the tread member 16 from being bent and deformed in the tire width direction H during traveling, and it is possible to make it difficult to separate the visible body 43 from the tread member 16.

In addition, when the length L along the tire circumferential direction of the visible body 43 is 35% or less of the total length along the tire circumferential direction of the tread member 16, the visible body 43 is It is possible to suppress bending and deformation in the direction, and it is possible to make it difficult to separate the visible body 43 from the tread member 16. Here, when the length L along the tire circumferential direction of the visible body 43 is larger than 35% of the total length of the tread member 16 along the tire circumferential direction, the visible body 43 bends in the tire circumferential direction. It may be difficult to suppress the deformation.
Further, when the non-pneumatic tire 1 is mounted on a low-weight vehicle such as the small vehicle and travels at a low speed, the tread member 16 is not easily deformed and deformed during travel. 43 can be made more difficult to separate from the tread member 16.

  In addition, since the visible body 43 is disposed on the wall surface that defines the groove portion 42, it is possible to make it difficult for the visible body 43 to contact the road surface during traveling, and the visible body 43 is made to be a tread member. It is possible to make it difficult to separate from 16.

Furthermore, since the visible body 43 is disposed on the bottom wall surface, the visible body 43 can be easily seen from the traveling direction of the non-pneumatic tire 1 and visibility from the surroundings can be improved. It can certainly be improved.
Here, since the bottom wall surface is less likely to be deformed and deformed during traveling as compared with the side wall surface of the groove portion 42, the object to be viewed 43 is disposed on the bottom wall surface as described above, so that the object to be viewed is provided. 43 can be made more difficult to separate from the tread member 16.

In addition, since the visible body 43 is arranged in the arrangement recess 44, it is possible to suppress the volume of the groove 42 from being reduced due to the arrangement of the visible body 43. The drainage property of the non-pneumatic tire 1 can be easily ensured.
Furthermore, since the visible body 43 is formed in the same shape and size as the arrangement recess 44, for example, when the water flows in the groove portion 42, the visible body 43 receives water pressure from the outer peripheral edge thereof. It becomes possible to make it easier to suppress the movement of the object 43 and make it difficult to separate the visible body 43 from the tread member 16.

Further, among the visually-recognized bodies 43 adjacent to each other in the tire circumferential direction, the circumferential end portions in the tire circumferential direction are shifted from each other in the tire width direction H and overlap each other in the tire circumferential direction. It becomes possible to arrange | position the to-be-viewed body 43 to a tire peripheral direction continuously on an outer peripheral surface, and can improve visibility more reliably.
In addition, since a plurality of the visible bodies 43 are arranged on the outer circumferential surface of the tread member 16 in the tire circumferential direction, even if a part of the plurality of the visible bodies 43 is detached, It becomes possible to make it easy to ensure visibility by the visual recognition body 43. For example, one visual recognition object is continuously arranged in the tire circumferential direction over a range equivalent to the plurality of visual recognition objects 43. Compared with the case, visibility can be easily secured.

  Moreover, in this embodiment, the 1st division | segmentation exterior body 25, the 1st division | segmentation ring-shaped body 23, and the 1st division | segmentation exterior body 26 and the other side division | segmentation exterior body 26 in which the 1st elastic connection board 21 was integrally formed. A split ring-shaped body 24 and a second split case body 32 in which the second elastic connecting plate 22 is integrally formed. Therefore, when assembling the non-pneumatic tire 1, both ends of each of the plurality of connecting members 15 are provided. Since the first and second divided case bodies 31 and 32 need only be attached to the mounting body 11 without connecting the parts 21a, 22a, 21b and 22b to the mounting body 11 and the ring-shaped body 13 separately, Time can be shortened.

Further, since the first and second divided case bodies 31 and 32 are provided, for example, the both end portions 21a, 22a, 21b, and 22b of the connecting member 15 and the attachment body 11 and the ring-shaped body 13 are connected to a fastening member or the like. The weight can be reduced as compared with the case of connecting using the.
Further, a plurality of first elastic connecting plates 21 are arranged along the tire circumferential direction at a position in one tire width direction H, and the second elastic connecting plates 22 are arranged around the tire circumference at other tire width direction H positions. Since a plurality are arranged along the direction, it is possible to prevent the adjacent connecting members 15 from interfering with each other in the tire circumferential direction, and it is possible to prevent the number of arrangement members from being limited.

  Further, in the first elastic connecting plate 21, one end 21 a connected to the ring-shaped body 13 is located on one side in the tire circumferential direction with respect to the other end 21 b connected to the exterior body 12, and second elastic Of the connecting plate 22, one end 22 a connected to the ring-shaped body 13 is located on the other side in the tire circumferential direction with respect to the other end 22 b connected to the exterior body 12. When an external force is applied to the first elastic connecting plate 21, the first elastic connecting plate 21 and the second elastic connecting plate 22 can be easily elastically deformed. Comfort can be ensured.

  Further, in each of the first divided case body 31 and the second divided case body 32, the tire among the first elastic connecting plate 21 and the second elastic connecting plate 22 is provided between the ring-shaped body 13 and the exterior body 12. In the side view, only one of a plurality extending in a certain direction is provided, and the other extending in the other direction is not provided, so that the exterior body 12, the ring-shaped body 13, and the connecting member 15 are formed. In this case, first, the exterior body 12, the ring-shaped body 13, and the connecting member 15 are integrally formed by forming the first and second divided case bodies 31 and 32 that are simple in structure and can be easily formed. This non-pneumatic tire 1 can be formed easily and reliably as compared with the case where the case body having a complicated structure is formed.

Moreover, since the 1st, 2nd division | segmentation case bodies 31 and 32 are each integrally formed by casting or injection molding, this non-pneumatic tire 1 can be formed still more easily.
In addition, as described above, in each of the divided case bodies 31 and 32, only one of the elastic connecting plates 21 and 22 is disposed between the ring-shaped body 13 and the exterior body 12. In addition, when the divided case bodies 31 and 32 are integrally formed by casting or injection molding, it becomes possible to easily make the molten metal or molten resin easily reach every corner of the mold, and the structure of the mold. It is also possible to suppress the complexity of the tire, and the non-pneumatic tire 1 can be formed more easily and reliably.

  Further, since the connecting member 15 is formed symmetrically with respect to the virtual line L in the tire side view, the spring constant along one side in the tire circumferential direction and the other side of the non-pneumatic tire 1 are along. It becomes possible to suppress the difference between the spring constant and good maneuverability.

  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, in the above-described embodiment, the visually-recognized body 43 is disposed on the bottom wall surface of the central portion 42c of the groove portion 42. However, the present invention is not limited to this, and the one end portion 42a and the other end of the groove portion 42 are not limited thereto. It may be disposed on the bottom wall surface of the part 42b, the first connection part 42d, or the second connection part 42e.

Moreover, the groove part 42 is not restricted to what was shown to the said embodiment.
For example, in the above-described embodiment, the groove portion 42 gradually extends from one side in the tire width direction H where the key groove portion 18a opens toward the other side toward the other side in the tire circumferential direction. However, the present invention is not limited to this. For example, the groove portion 42 gradually moves from the other side in the tire width direction H where the key groove portion 18a is closed toward the one side, gradually from the other side in the tire circumferential direction to the one side. It may extend towards.

  Further, for example, the groove may be configured as shown in FIG. In the non-pneumatic tire 50 shown in FIG. 6, on the outer circumferential surface of the tread member 16, the tire equator CL is crossed in the tire width direction H, and gradually increases from one side to the other side in the tire width direction H A pair of narrow grooves (grooves) 51 extending from one side of the direction to the other side are arranged at intervals in the tire circumferential direction. The pair of narrow grooves 51 are formed in the same shape and size. In the illustrated example, the narrow grooves 51 extend linearly in the tire plan view, and the positions of the pair of narrow grooves 51 are shifted from each other in the tire width direction H. Among these, the narrow groove 51 located on the other side in the tire circumferential direction is shifted to one side in the tire width direction H with respect to the narrow groove 51 located on one side in the tire circumferential direction. The pair of narrow grooves 51 are arranged so as to be point-symmetric with respect to the center of symmetry C2 on the tire equator CL in the tire plan view. A plurality of the pair of narrow grooves 51 are arranged at intervals in the tire circumferential direction.

Further, on the outer peripheral surface of the tread member 16, a first drainage groove (groove portion) 52 connected to the narrow groove 51 located on the other side in the tire circumferential direction among the pair of narrow grooves 51 is disposed. The first drainage groove 52 is a narrow groove 51 located on the other side in the tire circumferential direction, gradually from the portion located on the tire equator CL toward one side in the tire width direction H, gradually on the other side in the tire circumferential direction. The one end portion of the first drainage groove 52 in the tire width direction H is open to the edge of the tread member 16 on one side in the tire width direction H.
Further, the first drainage groove 52 is gradually widened toward one side in the tire width direction H, and among the wall surfaces defining the first drainage groove 52, a side wall surface facing one side in the tire circumferential direction, and Each side wall surface facing the other side in the tire circumferential direction has a curved shape that protrudes toward the other side in the tire width direction H in the tire plan view. Of these both side wall surfaces, a pair of narrow walls located on the other side in the tire circumferential direction is formed on the side wall surface facing one side in the tire circumferential direction with respect to the narrow groove 51 to which the first drainage groove 52 is connected. A groove 51 is opened for each.

Further, a second drainage groove (groove portion) 53 connected to the narrow groove 51 located on one side in the tire circumferential direction of the pair of narrow grooves 51 is disposed on the outer peripheral surface of the tread member 16. The second drainage groove 53 is gradually formed on one side in the tire circumferential direction from the portion located on the tire equator CL to the other side in the tire width direction H in the narrow groove 51 located on one side in the tire circumferential direction. The other end of the second drainage groove 53 in the tire width direction H is open to the other edge of the tread member 16 in the tire width direction H.
Further, the second drainage groove 53 is gradually widened toward the other side in the tire width direction H, and among the wall surfaces defining the second drainage groove 53, a side wall surface facing the other side in the tire circumferential direction, and Each side wall surface facing one side in the tire circumferential direction has a curved shape that protrudes toward one side in the tire width direction H in the tire plan view. Of these both side wall surfaces, a pair of fine walls positioned on one side in the tire circumferential direction is formed on the side wall surface facing the other side in the tire circumferential direction with respect to the narrow groove 51 to which the second drainage groove 53 is connected. A groove 51 is opened for each.

  In the illustrated example, a plurality of the first drain grooves 52 and the second drain grooves 53 are arranged at intervals in the tire circumferential direction so that both the drain grooves 52 and 53 are adjacent to each other in the tire width direction H. Has been. Further, these drainage grooves 52 and 53 are arranged so as to be point-symmetric with respect to the symmetry center C2 in the tire plan view.

  The tread member 16 is partitioned between the first central land portion 54 defined between the pair of narrow grooves 51 and the first drainage groove 52 and the second drainage groove 53 adjacent to each other in the tire width direction H. The second central land portion 55, the one side land portion 56 defined between the first drainage grooves 52 adjacent in the tire circumferential direction, and the other defined between the second drainage grooves 53 adjacent in the tire circumferential direction. A side land portion 57 is disposed. Each of the first central land portion 54, the second central land portion 55, the one-side land portion 56, and the other-side land portion 57 is disposed at intervals in the tire circumferential direction. The first central land portion 54 and the second central land portion 55 are alternately arranged in the tire circumferential direction on the tire equator portion CL.

The first central land portion 54 gradually extends from one side in the tire width direction H toward the other side and from one side in the tire circumferential direction toward the other side. The surface gradually extends inward in the tire radial direction along the direction in which the first central land portion 54 extends, from the center of the first central land portion 54 toward the outside. The top surface of the first central land portion 54 has a curved shape that protrudes outward in the tire radial direction in a cross-sectional view along both the tire radial direction and the direction in which the first central land portion 54 extends. I am doing.
The second central land portion 55 extends gradually from the other side in the tire width direction H toward one side, and extends from one side in the tire circumferential direction toward the other side. In the portion of the surface located on the tire equator portion CL, a concave groove (groove portion) 58 that gradually extends from one side in the tire width direction H toward the other side and from one side in the tire circumferential direction toward the other side. Is formed.

In the non-pneumatic tire 50 as described above, the visually recognized bodies 59 a and 59 b are intermittently disposed in the tire circumferential direction on the outer circumferential surface of the tread member 16. In the illustrated example, the visible bodies 59a and 59b include a first visible body 59a disposed on the bottom wall surface that defines the first drainage groove 52 and a bottom wall surface that defines the second drainage groove 53. 2nd to-be-viewed body 59b arrange | positioned. In the tire plan view, the outer peripheral edge of the first visible body 59a extends along the inner peripheral edge of the bottom wall surface of the first drainage groove 52, and the outer peripheral edge of the second visible body 59b is the second drainage groove. 53 extends along the inner peripheral edge of the bottom wall surface.
A plurality of first visible bodies 59a and second visible bodies 59b are arranged at intervals in the tire circumferential direction such that both the visible bodies 59a59b are adjacent to each other in the tire width direction H. Further, the visually recognized bodies 59a and 59b are intermittently disposed in the tire circumferential direction by being disposed with an interval in the tire circumferential direction between those adjacent in the tire circumferential direction.

  In the present embodiment, the first visible body 59a and the second visible body 59b are provided. However, only the first visible body 59a is provided, and the second visible body 59b is provided. Or only the second visible body 59b may be provided and the first visible body 59a may not be provided. The visually recognized bodies 59a and 59b may be disposed on the bottom wall surfaces of the pair of narrow grooves 51 or the concave grooves 58 which are different groove portions from the first drain grooves 52 and the second drain grooves 53.

Further, in each of the above embodiments, the visually-recognized bodies 43, 59a, and 59b are disposed on the bottom wall surfaces of the groove portions 42, 51, 52, 53, and 58. However, the present invention is not limited to this. You may arrange | position in the side wall surface of the groove parts 42, 51, 52, 53, 58.
Further, in each of the above embodiments, the visually-recognized bodies 43, 59a, and 59b are formed in a sheet shape having the same shape and size as the arrangement recess 44 in the tire plan view, but are arranged in the arrangement recess 44. For example, the visible bodies 43, 59a, and 59b may be formed smaller than the arrangement recess 44 in the tire plan view, and may not be formed into a sheet shape. Also good. Further, the arrangement recess may be formed on the side wall surface of the groove portions 42, 51, 52, 53, 58, and the arrangement recess 44 may not be provided, and the visible bodies 43, 59 a, 59 b may be provided in the groove portion 42. , 51, 52, 53, 58 may be directly fixed to the wall surface, for example, by bonding.

Further, the groove portions 42, 51, 52, 53, and 58 are not limited to those shown in the respective embodiments, and may be appropriately changed.
Further, in each of the above embodiments, the visually-recognized bodies 43, 59a, and 59b are disposed on the wall surfaces that define the groove portions 42, 51, 52, 53, and 58. However, the present invention is not limited to this. For example, you may arrange | position at the top face of land part 41,54,55,56,57. Furthermore, the number of objects to be visually recognized 43, 59a, 59b may be one.

Further, the bending direction of the bending portions 21d to 21f in the first elastic connecting plate 21 and the bending direction of the bending portions 22d to 22f in the second elastic connecting plate 22 are not limited to the above embodiments, and may be changed as appropriate.
In each of the above-described embodiments, the configuration in which the first elastic connecting plate 21 and the second elastic connecting plate 22 are provided as the connecting member 15, respectively. A configuration may be adopted in which a plurality of first elastic connecting plates 21 and a plurality of second elastic connecting plates 22 are provided in different positions in the tire width direction H.
A plurality of connecting members 15 may be provided along the tire width direction H between the exterior body 12 and the ring-shaped body 13.

Further, the other end portions 21b and 22b of the first elastic connecting plate 21 and the second elastic connecting plate 22, respectively, sandwich the axis O in the tire radial direction on the outer peripheral surface of the exterior body 12, for example, instead of the above embodiments. In the outer peripheral surface of the exterior body 12, the tire diameter may be connected to the first end portions 21a and 22a of the first elastic connecting plate 21 and the second elastic connecting plate 22, respectively. You may connect to the position etc. which oppose in a direction.
Further, instead of the above-described embodiments, the one end portions 21a and 22a of both the connecting plates 21 and 22 may be connected to the inner peripheral surface of the ring-shaped body 13 at different positions in the tire circumferential direction.

Furthermore, it is not necessary to provide a gap in the tire width direction H between the one-side divided outer package 25 and the other-side divided outer package 26.
Further, the exterior body 12 and the ring-shaped body 13 may be divided into three or more in the tire width direction H, or may not be divided.
Furthermore, the first and second divided case bodies 31 and 32 are not limited to the above embodiments, and may be formed by, for example, cutting.

Moreover, in each said embodiment, although the exterior body 12, the ring-shaped body 13, and the some connection member 15 shall be formed integrally, it is not restricted to this, After forming each separately, They may be connected to each other. Furthermore, the exterior body 12 may be formed integrally with the attachment body 11.
Further, in each of the above embodiments, the connecting member 15 connects the outer peripheral surface of the exterior body 12 and the inner peripheral surface of the ring-shaped body 13, but the outer peripheral surface side of the attachment body 11 and the ring-shaped body 13 are connected. You may change suitably to the other structure which connects an internal peripheral surface side. For example, in a configuration without the exterior body 12, the connecting member 15 may connect the outer peripheral surface of the attachment body 11 and the inner peripheral surface of the ring-shaped body 13 to each other.

  In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

DESCRIPTION OF SYMBOLS 1, 50 Non-pneumatic tire 11 Attachment body 13 Ring-shaped body 15 Connection member 16 Tread member 42, 51, 52, 53, 58 Groove part 43, 59a, 59b Subject to be viewed 44 Arrangement concave part

Claims (4)

An attachment attached to the axle;
A ring-shaped body surrounding the mounting body from the outside in the tire radial direction;
A plurality of connection members disposed along the tire circumferential direction between the attachment body and the ring-shaped body, and a connection member that relatively elastically displaces the attachment body and the ring-shaped body;
A non-pneumatic tire comprising a tread member disposed on the outer peripheral surface side of the ring-shaped body over the entire circumference thereof,
On the outer peripheral surface of the tread member, a visible body whose surface is exposed to the outside is disposed,
The surface of the conspicuity body, reflection luminance than the outer peripheral surface of the tread member is rather high,
The object to be visually recognized is disposed on a wall surface defining a groove formed on the outer peripheral surface of the tread member, and is disposed in an arrangement recess formed on the wall surface defining the groove. Characteristic non-pneumatic tire. The non-pneumatic tire according to claim 1 ,
The non-pneumatic tire is characterized in that the visible body is disposed on a bottom wall surface facing an outer side in a tire radial direction among the wall surfaces defining the groove portion. The non-pneumatic tire according to claim 1 or 2 ,
The object to be visually recognized is formed in a sheet shape in which a back surface opposite to the front surface is fixed to a bottom surface facing the opening direction of the placement recess, among the wall surfaces defining the placement recess,
The non-pneumatic tire is characterized in that the body to be visually recognized is formed in the same shape and size as the arrangement recess in a front view seen from the opening direction. The non-pneumatic tire according to any one of claims 1 to 3 ,
A plurality of the visible bodies are disposed on the outer circumferential surface of the tread member in the tire circumferential direction,
Non-pneumatic tires characterized in that, among the visible objects adjacent to each other in the tire circumferential direction, circumferential end portions in the tire circumferential direction are shifted from each other in the tire width direction and overlap each other in the tire circumferential direction. .

Images