Tire

Abstract

To provide a tire having a tread member capable of realizing weight reduction.SOLUTION: A tire according to the present disclosure comprises at least one annular body. The annular body includes: a rim member having a plurality of rim parts arranged opposite to each other in a tire width direction; a plurality of plate-like tread members attached in an arch shape between two outer rim parts located on outermost sides of the plurality of rim parts on both sides in the tire width direction at different positions in a tire circumferential direction; and a plurality of plate-like support members, each of which is located on an inner side in a tire radial direction of the plurality of plate-like tread members at different positions in a tire circumferential direction, and which are attached in an arch shape between two of the plurality of rim parts and are capable of elastically supporting the plate-like tread members from an inner side in the tire radial direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to tires. [Background technology]

[0002] Tires constructed using coil springs have been known for some time. For example, Patent Document 1 discloses a tire including a framework and a tread member. The framework of Patent Document 1 includes a rim member, a plurality of main body springs, and a plurality of connecting springs. Patent Document 1 also discloses, as an example, a tread member including a metal nonwoven fabric that is mounted so that at least a portion of the tread member is embedded in a groove formed by the main body spring and the connecting spring. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-192930 A Summary of the Invention [Problem to be solved by the invention]

[0004] The tire disclosed in Patent Document 1 is equipped with tread members that are arranged on the outer periphery of a framework formed using springs, which makes it possible to prevent foreign matter such as sand from entering the inside of the tire, and as a result, driving performance is less likely to deteriorate.

[0005] However, the tire disclosed in Patent Document 1 still has room for improvement in terms of reducing the weight of the tread member.

[0006] An object of the present disclosure is to provide a tire including a tread member that can achieve weight reduction. [Means for solving the problem]

[0007] A tire according to a first aspect of the present invention comprises: (1) At least one annular body; The annular body is A rim member including a plurality of rim portions disposed opposite to each other in a tire width direction; A plurality of plate-like tread members are attached in an arch shape between two outer rim portions located outermost on both sides in the tire width direction among the plurality of rim portions at different positions in the tire circumferential direction; and a plurality of plate-shaped support members, each of which is located at different positions in the tire circumferential direction, radially inward of each of the plurality of plate-shaped tread members, and which are attached in an arch shape between two of the plurality of rim portions, and which are capable of elastically supporting the plate-shaped tread member from the radially inward direction of the tire.

[0008] A tire according to one embodiment of the present invention includes: (2) The tire according to (1) above, wherein the plate-like tread member has a plurality of protrusions on an outer surface on an outer side in the tire radial direction.

[0009] A tire according to one embodiment of the present invention includes: (3) The annular body includes a plurality of plate-shaped reinforcing members that are attached in an arch shape between the two outer rim portions to which the plurality of plate-shaped tread members are attached at different positions in the tire circumferential direction, The tire according to the above-mentioned (1) or (2), wherein each of the plurality of plate-shaped reinforcing members is located between the plate-shaped support member and the plate-shaped tread member in the tire radial direction.

[0010] A tire according to one embodiment of the present invention includes: (4) the annular body includes a plurality of core members attached in an arch shape between the two rim portions to which the plurality of plate-like support members are attached at different positions in the tire circumferential direction, The tire according to any one of (1) to (3) above, wherein each of the plurality of core members is disposed on an inner side of the plate-shaped support member in the tire radial direction.

[0011] A tire according to one embodiment of the present invention includes: (5) The tire is described in any one of (1) to (4) above, wherein the plate-shaped support member is fixed at two or more positions to each of the two rim portions to which the plate-shaped support member is attached.

[0012] A tire according to one embodiment of the present invention includes: (6) The tire is described in any one of (1) to (5) above, wherein the plate-like tread member is fixed at two or more positions to each of the two outer rim portions to which the plate-like tread member is attached.

[0013] A tire according to one embodiment of the present invention includes: (7) At least one of the two outer rim portions to which the plate-like tread member is attached is a common outer rim portion that is common to at least one of the two rim portions to which the plate-like support member is attached, The annular body is a clamping member including a clamping portion that clamps and holds, between the common outer rim portion, an end portion of the plate-like tread member and an end portion of the plate-like support member located between the end portion of the plate-like tread member and the common outer rim portion; The tire according to any one of (1) to (6) above, further comprising a buffer member interposed between the clamping portion of the clamping member and the end portion of the plate-like tread member.

[0014] A tire according to one embodiment of the present invention includes: (8) The tire is described in any one of (1) to (7) above, wherein the two outer rim portions to which the plate-shaped tread members are attached are two common outer rim portions common to the two rim portions to which the plate-shaped support members are attached.

[0015] A tire according to one embodiment of the present invention includes: (9) the rim member of the annular body comprises one or more intermediate rim portions between the two outer rim portions; The tire is described in any one of (1) to (7) above, wherein the multiple plate-shaped support members are attached in an arch shape at different positions in the tire circumferential direction between at least one pair of adjacent rim portions among the two outer rim portions and the one or more intermediate rim portions.

[0016] A tire according to one embodiment of the present invention includes: (10) The plurality of plate-shaped support members include a first support member group consisting of a plurality of plate-shaped support members attached in an arch shape at different positions in the tire circumferential direction between one of the two outer rim portions and one of the one or more intermediate rim portions that is adjacent to the one of the outer rim portions; and The tire is described in (9) above, including a second support member group consisting of a plurality of plate-shaped support members attached in an arch shape at different positions in the tire circumferential direction between the other outer rim portion of the two outer rim portions and an intermediate rim portion among the one or more intermediate rim portions that is adjacent to the other outer rim portion.

[0017] A tire according to one embodiment of the present invention includes: (11) The tire according to any one of (1) to (10) above, wherein a plurality of the annular bodies are arranged in parallel in the tire width direction. Effect of the Invention

[0018] According to the present disclosure, it is possible to provide a tire including a tread member that can achieve weight reduction. [Brief description of the drawings]

[0019] [Figure 1] 1 is an external perspective view of a tire according to one embodiment of the present disclosure. FIG. [Diagram 2] FIG. 2 is a diagram showing details of the tire shown in FIG. [Diagram 3] FIG. 2 is a cross-sectional view in the tire width direction of the tire shown in FIG. [Figure 4] FIG. 2 is a diagram showing a modified example of the tire shown in FIG. [Diagram 5] 1 is a cross-sectional view in a tire width direction of a tire according to one embodiment of the present disclosure. [Figure 6] 1 is a cross-sectional view in a tire width direction of a tire according to one embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of a tire according to the present disclosure will be described with reference to the drawings. In each drawing, the same components are denoted by the same reference numerals. In this specification, the tire width direction refers to a direction parallel to the tire rotation axis. The tire radial direction refers to a radial direction perpendicular to the tire rotation axis and centered on the tire rotation axis. The tire circumferential direction refers to a direction around the tire rotation axis centered on the tire rotation axis.

[0021] FIG. 1 is an external perspective view of a tire 1 according to an embodiment of the present disclosure. FIG. 1 shows the tire 1 in an unloaded state in which no external force is applied. FIG. 2 is a diagram showing details of the tire 1 shown in FIG. 1. FIG. 3 is a tire widthwise cross-sectional view of the tire 1 shown in FIG. 1. The "tire widthwise cross-sectional view" of the tire 1 is a cross-sectional view of the tire 1 taken along a plane including the rotation axis of the tire 1 and parallel to the tire width direction A. As shown in FIGS. 1 to 3, the tire 1 includes at least one annular body 1a. More specifically, the tire 1 of this embodiment includes only one annular body 1a. As shown in FIGS. 2 and 3, the annular body 1a of this embodiment includes a rim member 2, a plate-shaped support member 3, a plate-shaped tread member 4, and a core member 5.

[0022] The rim member 2 comprises a number of rim portions 100 arranged opposite each other in the tire width direction A. As shown in Figs. 1 to 3, the rim member 2 of this embodiment comprises two rim portions 100. Hereinafter, for convenience of explanation, the two rim portions 100 located on the outermost sides in the tire width direction A will be referred to as the "outer rim portion 101". As shown in Figs. 1 to 3, the rim member 2 of this embodiment comprises only two outer rim portions 101. In other words, the rim member 2 of this embodiment does not comprise another rim portion 100 between the two outer rim portions 101. Hereinafter, for convenience of explanation, the two outer rim portions 101 will be referred to as the "first outer rim portion 101a" and the "second outer rim portion 101b" in order to distinguish them from each other. In addition, when the first outer rim portion 101a and the second outer rim portion 101b are not particularly distinguished from each other, they will simply be referred to as the "outer rim portion 101".

[0023] As shown in FIG. 1 and FIG. 2, the rim member 2 of this embodiment includes two flat annular plate members 103 with an opening in the center, and a plurality of connecting members 105 that connect these annular plate members 103. The two annular plate members 103 are arranged facing each other at a predetermined distance. The connecting member 105 connects the two annular plate members 103 in a state in which the two annular plate members 103 are arranged facing each other at a predetermined distance. In this embodiment, one annular plate member 103 constitutes the first outer rim portion 101a. Also, in this embodiment, the other annular plate member 103 constitutes the second outer rim portion 101b. The rim member 2 is configured to be mounted on a wheel member that can be mounted on a vehicle, for example. However, the rim member 2 is not limited to the configuration of this embodiment. The rim member 2 may be configured to include a plurality of rim portions 100 that are arranged facing each other in the tire width direction A, and is not limited to the configuration of the two annular plate members 103 and the plurality of connecting members 105 of this embodiment. Additionally, the rim member 2 itself may include, for example, a wheel portion that can be directly mounted to a vehicle.

[0024] There is no particular limit to the number of rim portions 100 provided on the rim member 2. The rim member 2 may, for example, be provided with three or more rim portions 100. Details of the configuration in which the rim member 2 is provided with three or more rim portions 100 will be described later (see FIG. 6).

[0025] The outer rim portion 101 is made of metal such as stainless steel or resin. That is, the two annular plate members 103 of this embodiment are made of metal or resin. The outer rim portion 101 is formed in an annular shape. The first outer rim portion 101a and the second outer rim portion 101b are arranged at a distance in the tire width direction A so that their central axes are coaxial. In this embodiment, the first outer rim portion 101a and the second outer rim portion 101b have the same size and shape. However, as long as they can function as a tire 1, the first outer rim portion 101a and the second outer rim portion 101b may be configured to have different sizes or shapes. The outer diameters of the first outer rim portion 101a and the second outer rim portion 101b may be appropriately determined according to the required size of the tire 1.

[0026] The connecting member 105 is made of a metal such as stainless steel, or a resin. The rim member 2 of this embodiment includes a plurality of connecting members 105 arranged at different positions in the tire circumferential direction B. The number of connecting members 105 is not particularly limited. Hereinafter, in this embodiment, the second outer rim portion 101b side across the first outer rim portion 101a and the first outer rim portion 101a side across the second outer rim portion 101b may be referred to as the "inner side in the tire width direction A". In addition, the opposite side of the second outer rim portion 101b side across the first outer rim portion 101a and the opposite side of the first outer rim portion 101a side across the second outer rim portion 101b may be referred to as the "outer side in the tire width direction A".

[0027] The plate-shaped support member 3 is attached in an arch shape between two of the multiple rim portions 100 of the rim member 2. Specifically, the plate-shaped support member 3 of this embodiment is attached in an arch shape between the first outer rim portion 101a and the second outer rim portion 101b. More specifically, the plate-shaped support member 3 of this embodiment is bridged between the first outer rim portion 101a and the second outer rim portion 101b in a state in which it is curved in the thickness direction so that the outer side in the tire radial direction C is convex. In this state, both ends of the plate-shaped support member 3 are attached to the first outer rim portion 101a and the second outer rim portion 101b. As a result, the plate-shaped support member 3 is configured to be bent and elastically deformable in the tire radial direction C.

[0028] The plate-shaped support member 3 is located on the inner side of the plate-shaped tread member 4 in the tire radial direction C, which will be described later. The plate-shaped support member 3 is configured to be able to elastically support the plate-shaped tread member 4 in the tire radial direction C, which will be described later, from the inner side. More specifically, as shown in FIG. 3, an outer surface 11, which is the outer surface in the tire radial direction C of the plate-shaped support member 3 in this embodiment, abuts against an inner surface 22, which is the inner surface in the tire radial direction C of the plate-shaped tread member 4 in the tire radial direction C, which will be described later. The plate-shaped support member 3 receives a ground contact load through the plate-shaped tread member 4 when the plate-shaped tread member 4 comes into contact with the traveling road surface and is pressed inward in the tire radial direction C. The plate-shaped support member 3 can elastically deform inward in the tire radial direction C by receiving this ground contact load. When the plate-shaped support member 3 elastically deforms inward in the tire radial direction C due to the ground contact load, the plate-shaped tread member 4 also deforms inward in the tire radial direction C following the deformation of the plate-shaped support member 3. In this way, the plate-shaped support member 3 elastically deforms inward in the tire radial direction C together with the plate-shaped tread member 4 in response to a ground contact load, thereby being able to elastically support the plate-shaped tread member 4 from the inside in the tire radial direction C. In this way, the plate-shaped support member 3 can support the ground contact load via the plate-shaped tread member 4.

[0029] The annular body 1a includes a plurality of plate-shaped support members 3. The plurality of plate-shaped support members 3 are arranged at different positions in the tire circumferential direction B. More specifically, the plurality of plate-shaped support members 3 are arranged in the tire circumferential direction B so that two adjacent plate-shaped support members 3 in the tire circumferential direction B do not overlap in the tire circumferential direction B, i.e., so as not to overlap in the tire radial direction C. The separation distance between two adjacent plate-shaped support members 3 in the tire circumferential direction B is not particularly limited, but it is preferable to arrange them with a gap of 5 mm or less, for example, 1 mm. In this way, it is possible to prevent foreign objects such as sand on land that constitute the ground as the traveling road surface from entering between two adjacent plate-shaped support members 3 in the tire circumferential direction B and toward the inside in the tire radial direction C.

[0030] Moreover, the multiple plate-like support members 3 are disposed over the entire area in the tire circumferential direction B. The length L1 of each plate-like support member 3 in the tire circumferential direction B is preferably a length that forms a central angle around the rotation axis of the tire 1 of 2 to 10°, and more preferably a length that forms a central angle of 2 to 5°. This makes it easier to ensure the desired rigidity and deformation performance of each plate-like support member 3 in the tire radial direction C.

[0031] As described above, the plate-shaped support member 3 extends in an arch shape between the first outer rim portion 101a and the second outer rim portion 101b so that the outer side in the tire radial direction C is convex. The length of the extension direction D of the plate-shaped support member 3 of this embodiment is longer than the length L1 of the plate-shaped support member 3 in the tire circumferential direction B described above. In other words, the plate-shaped support member 3 of this embodiment is a curved strip-shaped member that is stretched between the first outer rim portion 101a and the second outer rim portion 101b. The plate thickness of the plate-shaped support member 3 is not particularly limited, but is preferably 0.1 to 0.5 mm, such as 0.3 mm. By setting the plate thickness in this manner, it becomes easier to ensure the desired rigidity and deformation performance of the plate-shaped support member 3 in the tire radial direction C.

[0032] The plate-shaped support member 3 in this embodiment is a plate-shaped member formed of a single plate material, but may be a plate-shaped member formed by stacking a plurality of plate materials in the tire radial direction C, for example.

[0033] The plate-shaped support member 3 includes one end 3a attached to the first outer rim portion 101a, the other end 3b attached to the second outer rim portion 101b, and a deformed portion 3c curved between the one end 3a and the other end 3b so as to be convex outward in the tire radial direction C. In this embodiment, the one end 3a, the other end 3b, and the deformed portion 3c are formed by each part of a plate-shaped member that is integrally connected in the extension direction D. The plate-shaped support member 3 extends in an arch shape from the one end 3a to the other end 3b. The one end 3a is arranged so as to cover the outer surface 111, which is the outer surface of the first outer rim portion 101a in the tire width direction A, and is fixed to the first outer rim portion 101a by a fastening member such as a bolt 50. The other end 3b is arranged so as to cover the outer surface 121, which is the outer surface of the second outer rim portion 101b in the tire width direction A, and is fixed to the second outer rim portion 101b by a fastening member such as a bolt 50. The fixing structure of the plate-shaped support member 3 to the first outer rim portion 101a and the second outer rim portion 101b will be described later in detail (see FIG. 3). The deformed portion 3c abuts against an inner surface 22 of the plate-shaped tread member 4 which will be described later.

[0034] The plate-shaped support member 3 may be configured, for example, such that a flat plate-shaped member is elastically bent and deformed before being attached to the first outer rim portion 101a and the second outer rim portion 101b. The plate-shaped support member 3 may also be configured, for example, such that a plate-shaped member is attached to the first outer rim portion 101a and the second outer rim portion 101b after being shape-memorized into a predetermined curved shape beforehand. Furthermore, the plate-shaped support member 3 may be configured to be formed into a predetermined curved shape beforehand, without being shaped into a curved shape from a flat plate. The predetermined curved shape may be, for example, a curved shape in the form of a circular arc having a certain curvature, or may be a curved shape formed by combining a plurality of arcs with different curvatures.

[0035] The plate-shaped support member 3 is made of a metal such as stainless steel, or a resin. The material of the plate-shaped support member 3 may be appropriately determined depending on the rigidity, deformation performance, durability, and the like required for the plate-shaped support member 3.

[0036] The plate-like tread member 4 is attached in an arch shape between two outer rim portions 101 located on the outermost sides in the tire width direction A among the multiple rim portions 100 of the rim member 2. Specifically, the plate-like tread member 4 in this embodiment is attached in an arch shape between the first outer rim portion 101a and the second outer rim portion 101b.

[0037] In addition, the plate-like tread member 4 of this embodiment is attached in an arch shape between the first outer rim portion 101a and the second outer rim portion 101b so as to cover the outer side of the plate-like support member 3 in the tire radial direction C. More specifically, the plate-like tread member 4 of this embodiment covers the outer surface 11 of the plate-like support member 3 and is bridged between the first outer rim portion 101a and the second outer rim portion 101b in a state in which it is curved in the thickness direction so that the outer side in the tire radial direction C is convex. In this state, both ends of the plate-like tread member 4 are attached to the first outer rim portion 101a and the second outer rim portion 101b. As described above, the inner surface 22 of the plate-like tread member 4 abuts against the outer surface 11 of the plate-like support member 3 (see FIG. 3). More specifically, as shown in Fig. 3, the inner surface 22 of the plate-like tread member 4 in this embodiment abuts against the outer surface 11 of the plate-like support member 3 over the entire area in the tire width direction A between the first outer rim portion 101a and the second outer rim portion 101b. The outer surface 21, which is the outer surface of the plate-like tread member 4 in the tire radial direction C, is exposed to the outside of the annular body 1a and is a contact surface that comes into contact with the traveling road surface. When the plate-like tread member 4 comes into contact with the traveling road surface and is pressed inward in the tire radial direction C, the plate-like tread member 4 can deform inward in the tire radial direction C following the plate-like support member 3, as described above.

[0038] In this way, the annular body 1a of the tire 1 includes both the plate-shaped support member 3 that supports the ground load received from the road surface, and the plate-shaped tread member 4 that constitutes the ground contact surface that contacts the road surface. In other words, the load-bearing function of supporting the ground load can be mainly borne by the plate-shaped support member 3, and the traction function on the road surface can be mainly borne by the plate-shaped tread member 4. In other words, in the annular body 1a of the tire 1, the load-bearing function and the traction function can be functionally separated and mainly borne by the plate-shaped support member 3 and the plate-shaped tread member 4, respectively. Therefore, compared with a configuration in which the desired load-bearing performance and traction performance are both achieved by a single member, it is easier to achieve the desired load-bearing performance and traction performance by a simple configuration using multiple plate-shaped members. Therefore, the tread member can be the plate-shaped tread member 4, and the weight of the tread member can be reduced.

[0039] Furthermore, by using the plate-like tread member 4 as the tread member, it is possible to easily form unevenness or the like on the outer surface 21 of the plate-like tread member 4 to improve traction performance. As shown in Figs. 1 to 3, the plate-like tread member 4 of this embodiment has a plurality of protrusions 21a on the outer surface 21. The protrusions 21a of this embodiment are protrusions having a substantially truncated cone shape, but the shape of the protrusions 21a is not particularly limited. The protrusions 21a may have another shape, such as a substantially conical shape or a hemispherical shape.

[0040] The annular body 1a also includes a plurality of plate-like tread members 4. The plurality of plate-like tread members 4 are arranged at different positions in the tire circumferential direction B. More specifically, the plurality of plate-like tread members 4 are arranged in the tire circumferential direction B so that two plate-like tread members 4 adjacent in the tire circumferential direction B do not overlap in the tire circumferential direction B, i.e., do not overlap in the tire radial direction C. The separation distance between two plate-like tread members 4 adjacent in the tire circumferential direction B is not particularly limited, but it is preferable that they are arranged with a gap of 5 mm or less, for example, 1 mm. In this way, foreign objects such as sand on land that constitute the ground as the traveling road surface can be prevented from entering between the two plate-like tread members 4 adjacent in the tire circumferential direction B to the inside in the tire radial direction C.

[0041] Moreover, the multiple plate-like tread members 4 are disposed over the entire area in the tire circumferential direction B. The length L3 of each plate-like tread member 4 in the tire circumferential direction B is preferably a length that forms a central angle of 2 to 10°, and more preferably a length that forms a central angle of 2 to 5° around the rotation axis of the tire 1. This makes it easier to ensure the deformation follow-up performance of the plate-like tread member 4 when the plate-like support member 3 receives a ground contact load and elastically deforms in the tire radial direction C.

[0042] In particular, it is preferable that each plate-like tread member 4 is not disposed so as to straddle the outer surfaces 11 of two adjacent plate-like support members 3 in the tire circumferential direction B. In other words, it is preferable that each plate-like tread member 4 is disposed so as to overlap only one plate-like support member 3 in the tire radial direction C. In this manner, it is possible to further improve the deformation follow-up performance of each plate-like tread member 4 when each plate-like support member 3 receives a ground contact load and deforms in the tire radial direction C. From this viewpoint, the length L3 in the tire circumferential direction B of each plate-like tread member 4 in this embodiment is set to be equal to or less than the length L1 in the tire circumferential direction B of each plate-like support member 3 described above. More specifically, the length L3 in the tire circumferential direction B of each plate-like tread member 4 in this embodiment is approximately equal to the length L1 in the tire circumferential direction B of each plate-like support member 3 at any position in the extending direction D and the extending direction E. In addition, each plate-like tread member 4 in this embodiment covers the outer surface 11 of each plate-like support member 3 between both ends of each plate-like support member 3 in the tire circumferential direction B. In other words, each plate-shaped tread member 4 in this embodiment covers the outer surface 11 of each plate-shaped support member 3 over the entire area between both ends of each plate-shaped support member 3 in the tire circumferential direction B, so as not to exceed both ends of each plate-shaped support member 3 in the tire circumferential direction B.

[0043] In other words, if one plate-shaped support member 3 and one plate-shaped tread member 4 arranged to overlap in the tire radial direction C are considered to be one arch unit, the annular body 1a includes a plurality of arch units arranged at different positions in the tire circumferential direction B. Furthermore, these multiple arch units are arranged over the entire area in the tire circumferential direction B.

[0044] As described above, the plate-like tread member 4 extends in an arch shape between the first outer rim portion 101a and the second outer rim portion 101b so that the outer side in the tire radial direction C is convex. The length of the extending direction E of the plate-like tread member 4 in this embodiment is longer than the length L3 of the plate-like tread member 4 in the tire circumferential direction B described above. That is, the plate-like tread member 4 in this embodiment is a curved band-like member that is spanned between the first outer rim portion 101a and the second outer rim portion 101b. The plate thickness of the plate-like tread member 4 is not particularly limited, but may be, for example, equal to or less than the plate thickness of the plate-like support member 3. The plate thickness of the plate-like tread member 4 is preferably less than 0.5 mm, such as 0.2 mm. By setting the plate thickness in this manner, it becomes easier to ensure the deformation follow-up performance of the plate-like tread member 4 when the plate-like support member 3 receives a ground contact load and elastically deforms in the tire radial direction C.

[0045] The plate-like tread member 4 is a plate-like member made of a single plate material.

[0046] The plate-like tread member 4 has one end 4a attached to the first outer rim portion 101a, the other end 4b attached to the second outer rim portion 101b, and a ground contact portion 4c curved between the one end 4a and the other end 4b so as to be convex outward in the tire radial direction C. In this embodiment, the one end 4a, the other end 4b, and the ground contact portion 4c are composed of each part of a plate-like member that is integrally connected in the extension direction E. The plate-like tread member 4 extends in an arch shape from the one end 4a to the other end 4b. The one end 4a is arranged so as to cover the outer surface 111 of the first outer rim portion 101a, and is fixed to the first outer rim portion 101a together with the one end 3a of the plate-like support member 3 by a fastening member such as a bolt 50. The other end 4b is disposed so as to cover the outer surface 121 of the second outer rim portion 101b, and is fixed to the second outer rim portion 101b together with the other end 3b of the plate-shaped support member 3 by a fastening member such as a bolt 50. The details of the fixing configuration of the plate-shaped tread member 4 to the first outer rim portion 101a and the second outer rim portion 101b will be described later (see FIG. 3). The ground contact portion 4c abuts against the outer surface 11 of the plate-shaped support member 3 described above, i.e., the outer surface of the deformed portion 3c of the plate-shaped support member 3, over the entire area in the tire width direction A between the first outer rim portion 101a and the second outer rim portion 101b.

[0047] The plate-like tread member 4 may be configured, for example, such that a flat plate-like member is elastically bent and deformed before being attached to the first outer rim portion 101a and the second outer rim portion 101b. The plate-like tread member 4 may also be configured, for example, such that the plate-like member is attached to the first outer rim portion 101a and the second outer rim portion 101b after being shape-memorized in a predetermined curved shape. The predetermined curved shape may be, for example, a circular arc-like curved shape having a constant curvature, or may be a curved shape formed by combining circular arcs with multiple curvatures.

[0048] As described above, in the plate-like tread member 4 of this embodiment, the one end 4a, the other end 4b, and the ground contact portion 4c are configured by each portion of a plate-like member that is integrally connected in the extending direction E, but the present invention is not limited to this configuration. The plate-like tread member 4 may be configured, for example, by separate plate materials that are connected in the extending direction E by rivets or the like. In other words, the one end 4a, the other end 4b, and the ground contact portion 4c of the plate-like tread member 4 may be configured by separate plate materials that are connected in the extending direction E. However, from the viewpoint of durability, it is preferable that the one end 4a, the other end 4b, and the ground contact portion 4c are configured by each portion of an integral plate-like member as in this embodiment.

[0049] The plate-like tread member 4 is made of a metal such as stainless steel, or a resin. The material of the plate-like tread member 4 may be appropriately determined depending on the rigidity, deformation performance, durability, and the like required for the plate-like tread member 4.

[0050] The core member 5 is disposed on the inside of the plate-shaped support member 3 in the tire radial direction C. In this embodiment, the core member 5 is attached in an arch shape between a first outer rim portion 101a and a second outer rim portion 101b as two rim portions 100 to which the plate-shaped support members 3 are attached.

[0051] The core member 5 of this embodiment is formed of a plate-shaped member, similar to the plate-shaped support member 3 and the plate-shaped tread member 4 described above. The plate-shaped core member 5 of this embodiment is bridged between the first outer rim portion 101a and the second outer rim portion 101b in a state in which it is curved in the thickness direction so that the outer side in the tire radial direction C is convex. In this state, both ends of the core member 5 are attached to the first outer rim portion 101a and the second outer rim portion 101b.

[0052] The core member 5 is disposed between the first outer rim portion 101a and the second outer rim portion 101b, spaced apart from the plate-shaped support member 3 on the inner side in the tire radial direction C. More specifically, the outer surface 41, which is the outer surface of the core member 5 in the tire radial direction C, is disposed between the first outer rim portion 101a and the second outer rim portion 101b, spaced apart from the inner surface 12, which is the inner surface of the plate-shaped support member 3 in the tire radial direction C, on the inner side in the tire radial direction C. When the plate-shaped support member 3 is significantly deformed inward in the tire radial direction C, the core member 5 comes into contact with the plate-shaped support member 3 and supports the plate-shaped support member 3. By providing such a core member 5, even when a large deformation of a predetermined amount or more occurs in the plate-shaped support member 3 on the inner side in the tire radial direction C, the core member 5 supports the plate-shaped support member 3, thereby suppressing plastic deformation of the plate-shaped support member 3.

[0053] The annular body 1a of this embodiment includes a plurality of core members 5. The core members 5 are arranged at different positions in the tire circumferential direction B. More specifically, the core members 5 are arranged in the tire circumferential direction B so that two core members 5 adjacent to each other in the tire circumferential direction B do not overlap each other in the tire circumferential direction B, i.e., so as not to overlap each other in the tire radial direction C. The distance between the two core members 5 adjacent to each other in the tire circumferential direction B is not particularly limited, but it is preferable that the two core members 5 are arranged with a gap of 5 mm or less, for example, 1 mm, between them. In this way, foreign objects such as sand on land that constitute the ground as the traveling road surface can be prevented from entering between the two core members 5 adjacent to each other in the tire circumferential direction B and toward the inside in the tire radial direction C.

[0054] Moreover, the multiple core members 5 are disposed over the entire area in the tire circumferential direction B. In particular, it is preferable that each core member 5 is not disposed so as to straddle two plate-shaped support members 3 adjacent in the tire circumferential direction B in the tire circumferential direction B. In other words, it is preferable that each core member 5 is disposed so as to overlap only one plate-shaped support member 3 in the tire radial direction C. In this way, when each plate-shaped support member 3 receives a ground contact load and is significantly deformed inward in the tire radial direction C, each core member 5 can support only one plate-shaped support member 3 overlapping in the tire radial direction C. Therefore, each core member 5 does not receive a load from multiple plate-shaped support members 3, and therefore the strength design of each core member 5 is easy. From this viewpoint, the length L5 in the tire circumferential direction B of each core member 5 in this embodiment is set to be equal to or less than the length L1 in the tire circumferential direction B of each plate-shaped support member 3 described above. More specifically, the length L5 in the tire circumferential direction B of each core member 5 in this embodiment is substantially equal to the length L1 in the tire circumferential direction B of each plate-shaped support member 3 at any position in the extension direction D. Moreover, each core member 5 in this embodiment is located between both end edges in the tire circumferential direction B of each plate-shaped support member 3. In other words, each core member 5 in this embodiment is located inside each plate-shaped support member 3 in the tire radial direction C over the entire area between both end edges in the tire circumferential direction B of each plate-shaped support member 3 so as not to exceed both end edges in the tire circumferential direction B of each plate-shaped support member 3.

[0055] As described above, the plate-shaped core member 5 of this embodiment extends in an arch shape between the first outer rim portion 101a and the second outer rim portion 101b so that the outer side in the tire radial direction C is convex. The length of the extending direction F of the plate-shaped core member 5 of this embodiment is longer than the length L5 of the plate-shaped core member 5 in the tire circumferential direction B described above. That is, the plate-shaped core member 5 of this embodiment is a curved strip-shaped member that is stretched between the first outer rim portion 101a and the second outer rim portion 101b. The thickness of the plate-shaped core member 5 is not particularly limited. The thickness of the plate-shaped core member 5 may be thicker than the thickness of the plate-shaped support member 3, or may be equal to or smaller than the thickness of the plate-shaped support member 3. The thickness of the plate-shaped core member 5 may be set to a level that does not cause plastic deformation when pressed by the greatly deformed plate-shaped support member 3, and may be, for example, 0.2 mm to 0.5 mm.

[0056] The plate-shaped core member 5 in this embodiment is a plate-shaped member constituted by a single plate material, but may be, for example, a plate-shaped member constituted by stacking a plurality of plate materials in the tire radial direction C.

[0057] The core member 5 has one end 5a attached to the first outer rim portion 101a, the other end 5b attached to the second outer rim portion 101b, and a main body portion 5c curved between the one end 5a and the other end 5b so as to be convex outward in the tire radial direction C. In this embodiment, the one end 5a, the other end 5b, and the main body portion 5c are composed of each part of a plate-shaped member that is integrally connected in the extension direction F. The plate-shaped core member 5 of this embodiment extends in an arch shape from the one end 5a to the other end 5b. The one end 5a is arranged so as to cover the outer surface 111 of the first outer rim portion 101a, and is fixed to the first outer rim portion 101a together with the one end 3a of the plate-shaped support member 3 and the one end 4a of the plate-shaped tread member 4 by a fastening member such as a bolt 50. The other end 5b is arranged so as to cover the outer surface 121 of the second outer rim portion 101b, and is fixed to the second outer rim portion 101b together with the other end 3b of the plate-shaped support member 3 and the other end 4b of the plate-shaped tread member 4 by fastening members such as bolts 50. The fixing structure of the core member 5 to the first outer rim portion 101a and the second outer rim portion 101b will be described in detail later (see FIG. 3). The main body portion 5c is arranged spaced apart and on the inside in the tire radial direction C from the deformed portion 3c of the plate-shaped support member 3 in an unloaded state in which no external force is applied to the annular body 1a.

[0058] The plate-shaped core member 5 may be configured, for example, as a flat plate-shaped member that is elastically bent and deformed before being attached to the first outer rim portion 101a and the second outer rim portion 101b. The plate-shaped core member 5 may be configured, for example, as a plate-shaped member that is attached to the first outer rim portion 101a and the second outer rim portion 101b after the plate-shaped member has been shape-memorized in a predetermined curved shape. The predetermined curved shape may be, for example, a circular arc-shaped curved shape having a constant curvature, or a curved shape formed by combining circular arcs with multiple curvatures.

[0059] The core member 5 is made of a metal such as stainless steel, or a resin. The material of the core member 5 may be appropriately determined depending on the rigidity, deformation performance, durability, and the like required for the core member 5.

[0060] Next, the details of the mounting configuration of the plate-like support member 3, the plate-like tread member 4, and the core member 5 to the rim portion 100 of the rim member 2 will be described with reference to Fig. 3. Here, the mounting configuration of one end 3a of the plate-like support member 3, one end 4a of the plate-like tread member 4, and one end 5a of the core member 5 to the first outer rim portion 101a will be described. The mounting configuration of the other end 3b of the plate-like support member 3, the other end 4b of the plate-like tread member 4, and the other end 5b of the core member 5 to the second outer rim portion 101b is similar to the mounting configuration of one end 3a of the plate-like support member 3, one end 4a of the plate-like tread member 4, and one end 5a of the core member 5 to the first outer rim portion 101a, so a description thereof will be omitted here.

[0061] As shown in FIG. 3, one end 3a of the plate-shaped support member 3, one end 4a of the plate-shaped tread member 4, and one end 5a of the core member 5 are attached to the first outer rim portion 101a in a state in which they are stacked on the outer surface 111 of the first outer rim portion 101a in the tire width direction A. A through hole is formed in each of the one end 3a of the plate-shaped support member 3, the one end 4a of the plate-shaped tread member 4, and the one end 5a of the core member 5. Also, a through hole having a female thread portion formed on the inner surface is formed in the first outer rim portion 101a. The through hole of the one end 3a of the plate-shaped support member 3, the through hole of the one end 4a of the plate-shaped tread member 4, the through hole of the one end 5a of the core member 5, and the through hole of the first outer rim portion 101a form a through hole that is connected in the tire width direction A, and the shaft portion of the bolt 50 is inserted into this through hole. Then, the male threaded portion of the shaft portion of the bolt 50 is screwed into the female threaded portion of the through hole in the first outer rim portion 101a. In this manner, one end 3a of the plate-shaped support member 3, one end 4a of the plate-shaped tread member 4, and one end 5a of the core member 5 are sandwiched in the tire width direction A by the head of the bolt 50 and the first outer rim portion 101a, and attached to the first outer rim portion 101a.

[0062] As shown in FIG. 3, in this embodiment, the plate-shaped support member 3, the plate-shaped tread member 4, and the core member 5 are fixed to the first outer rim portion 101a at two or more positions. Specifically, in this embodiment, one end 3a of the plate-shaped support member 3, one end 4a of the plate-shaped tread member 4, and one end 5a of the core member 5 are attached to the first outer rim portion 101a by two sets of bolts 50 arranged at different positions in the tire radial direction C. This suppresses the relative rotation of the plate-shaped support member 3, the plate-shaped tread member 4, and the core member 5 in the tire circumferential direction B with respect to the first outer rim portion 101a about the shaft portion of the bolt 50 as the central axis. Therefore, it is possible to suppress the plate-shaped support member 3 from abutting against another plate-shaped support member 3 adjacent to it in the tire circumferential direction B and pressing it in the tire circumferential direction B. As a result, it is possible to suppress damage to the plate-shaped support member 3 caused by a collision between two plate-shaped support members 3 adjacent to each other in the tire circumferential direction B. The same applies to the plate-like tread member 4 and the core member 5. In other words, it is possible to suppress damage to the plate-like tread member 4 caused by collision between two adjacent plate-like tread members 4 in the tire circumferential direction B. It is also possible to suppress damage to the core member 5 caused by collision between two adjacent core members 5 in the tire circumferential direction B.

[0063] In this embodiment, one end 3a of the plate-shaped support member 3, one end 4a of the plate-shaped tread member 4, and one end 5a of the core member 5 are attached to the first outer rim portion 101a at two different locations in the tire radial direction C, but this is not limited to the configuration. One end 3a of the plate-shaped support member 3, one end 4a of the plate-shaped tread member 4, and one end 5a of the core member 5 may be attached to the first outer rim portion 101a at two different locations in the tire circumferential direction B, for example. Also, one end 3a of the plate-shaped support member 3, one end 4a of the plate-shaped tread member 4, and one end 5a of the core member 5 may be attached to the first outer rim portion 101a at two different locations in both the tire circumferential direction B and the tire radial direction C, for example. Furthermore, one end 3a of the plate-shaped support member 3, one end 4a of the plate-shaped tread member 4, and one end 5a of the core member 5 may be fixed to the first outer rim portion 101a at three or more positions.

[0064] Further, the annular body 1a of the tire 1 of this embodiment includes a clamping member 60 having a clamping portion 60a that clamps and holds one end 4a as an end of the plate-like tread member 4 and one end 3a as an end of the plate-like support member 3 between the first outer rim portion 101a. The clamping member 60 of this embodiment is the above-mentioned bolt 50, and the clamping portion 60a of this embodiment is the head of the bolt 50. In this embodiment, the head of the bolt 50 clamps and holds one end 3a of the plate-like support member 3 and one end 4a of the plate-like tread member 4 between the first outer rim portion 101a. More specifically, the head of the bolt 50 of this embodiment clamps and holds one end 5a of the core member 5 in addition to one end 3a of the plate-like support member 3 and one end 4a of the plate-like tread member 4 between the first outer rim portion 101a. 3, one end 3a of the plate-like support member 3 is located between one end 4a of the plate-like tread member 4 and the first outer rim portion 101a. More specifically, in the annular body 1a of this embodiment, one end 4a of the plate-like tread member 4, one end 3a of the plate-like support member 3, one end 5a of the core member 5, and the first outer rim portion 101a are stacked in this order from the outer side to the inner side in the tire width direction A.

[0065] Here, as shown in FIG. 3, the annular body 1a of the tire 1 of this embodiment further includes a buffer member 61 interposed between the head of the bolt 50 as the clamping portion 60a and one end 4a of the plate-like tread member 4. The buffer member 61 is configured to be sandwiched between the head of the bolt 50 as the clamping portion 60a and one end 4a of the plate-like tread member 4 and be compressively deformed. That is, in this embodiment, one end 3a of the plate-like support member 3, one end 4a of the plate-like tread member 4, and one end 5a of the core member 5 are fixed to the first outer rim portion 101a by being sandwiched between the head of the bolt 50 as the clamping portion 60a and the first outer rim portion 101a in a state in which the buffer member 61 is compressed and deformed in the tire width direction A. By providing such a buffer member 61, it is possible to suppress the clamping portion 60a from directly contacting the one end 4a of the plate-like tread member 4. As a result, stress is concentrated at the boundary between the position where the clamping portion 60a directly contacts the one end 4a of the plate-like tread member 4 and the position where it does not directly contact the one end 4a, thereby preventing damage to the one end 4a of the plate-like tread member 4.

[0066] The buffer member 61 may have any configuration as long as it has a smaller Young's modulus than the clamping portion 60a and one end 4a of the plate-shaped tread member 4. In this embodiment, an aluminum plate material having a through hole formed therein is used as an example of the buffer member 61. As shown in FIG. 3, the shaft portion of the bolt 50 serving as the clamping member 60 in this embodiment is inserted into the through hole of the buffer member 61 in addition to the through hole of one end 3a of the plate-shaped support member 3, the through hole of one end 4a of the plate-shaped tread member 4, and the through hole of one end 5a of the core member 5.

[0067] Moreover, it is preferable that the buffer member 61 covers one end 4a of the plate-like tread member 4 over a range wider than the clamping portion 60a. That is, in this embodiment, it is preferable that the area of ​​the aluminum plate material serving as the buffer member 61 that contacts the one end 4a of the plate-like tread member 4 is larger than the area of ​​the underside of the head of the bolt 50. In this way, the compressive force applied to the one end 4a of the plate-like tread member 4 by the clamping portion 60a can be widely dispersed by the presence of the buffer member 61. Therefore, it is possible to further suppress the one end 4a of the plate-like tread member 4 from being damaged due to localized stress concentration at the above-mentioned boundary portion of the one end 4a of the plate-like tread member 4.

[0068] As shown in FIG. 2, the buffer members 61 are arranged in the tire circumferential direction B so as to cover each of the plate-like tread members 4 arranged in the tire circumferential direction B, but the configuration is not limited to this. The buffer members 61 may be arranged, for example, so as to cover two or more plate-like tread members 4 arranged in the tire circumferential direction B across the tire circumferential direction B. Therefore, the buffer members 61 may be, for example, composed of an annular plate member having a flat plate shape and defining an opening in the center, and may be arranged so as to cover all the plate-like tread members 4 arranged over the entire area of ​​the tire circumferential direction B. However, it is preferable that the buffer members 61 are provided separately for each plate-like tread member 4 as in this embodiment. In this way, the buffer members 61 can be reliably attached regardless of the tolerance of the mounting positions of the plate-like support member 3 and the plate-like tread member 4, etc.

[0069] In this embodiment, one end 3a of the plate-shaped support member 3, one end 4a of the plate-shaped tread member 4, and one end 5a of the core member 5 are attached to the first outer rim part 101a in a state in which they are stacked on the outer surface 111 of the first outer rim part 101a, but this configuration is not limited to this. For example, part or all of one end 3a of the plate-shaped support member 3, one end 4a of the plate-shaped tread member 4, and one end 5a of the core member 5 may be attached to the first outer rim part 101a in a state in which they are stacked on the inner surface 112, which is the inner surface of the first outer rim part 101a in the tire width direction A. However, from the viewpoint of efficiency of the attachment work, it is preferable that one end 3a of the plate-shaped support member 3, one end 4a of the plate-shaped tread member 4, and one end 5a of the core member 5 are attached to the first outer rim part 101a in a state in which they are stacked on the outer surface 111 of the first outer rim part 101a.

[0070] As described above, in the annular body 1a of this embodiment, both the plate-shaped support member 3 and the plate-shaped tread member 4 are attached to the first outer rim portion 101a and the second outer rim portion 101b. In other words, the two rim portions 100 to which the plate-shaped support member 3 is attached and the two rim portions 100 to which the plate-shaped tread member 4 is attached are common to the two outer rim portions 101. In other words, the first outer rim portion 101a and the second outer rim portion 101b are common outer rim portions to which both the plate-shaped support member 3 and the plate-shaped tread member 4 are attached. In this way, the outer rim portion 101 to which the plate-shaped tread member 4 is attached may be a common outer rim portion to which the plate-shaped support member 3 is also attached.

[0071] In the annular body 1a of this embodiment, all of the plate-shaped support members 3 arranged at different positions in the tire circumferential direction B, and all of the plate-shaped tread members 4 arranged at different positions in the tire circumferential direction B, are attached to a first outer rim portion 101a and a second outer rim portion 101b.

[0072] Next, a modification of the above-mentioned tire 1 will be described with reference to FIG.

[0073] Fig. 4 is a diagram showing a tire 201 as a modified example of the above-mentioned tire 1. Specifically, Fig. 4 is a cross-sectional view of the tire 201 in the tire width direction. As shown in Fig. 4, the tire 201 is different from the above-mentioned tire 1 (see Fig. 3, etc.) in the presence or absence of a plate-shaped reinforcing member 6, but the other configurations are the same. Here, the above-mentioned differences will be mainly described, and a description of the configurations in common with the tire 1 will be omitted.

[0074] As shown in Fig. 4, the tire 201 includes an annular body 201a. The annular body 201a includes a rim member 2, a plate-shaped support member 3, a plate-shaped tread member 4, a core member 5, and a plate-shaped reinforcing member 6. The configurations of the rim member 2, the plate-shaped support member 3, the plate-shaped tread member 4, and the core member 5 are the same as those in the tire 1 described above (see Fig. 3, etc.), so a description thereof will be omitted here.

[0075] The plate-shaped reinforcing member 6 is attached in an arch shape between the two outer rim portions 101. Specifically, the plate-shaped reinforcing member 6 is attached in an arch shape between the first outer rim portion 101a and the second outer rim portion 101b.

[0076] Moreover, the plate-shaped reinforcing member 6 is located between the plate-shaped support member 3 and the plate-shaped tread member 4 in the tire radial direction C. More specifically, the plate-shaped reinforcing member 6 shown in Fig. 4 is bridged between the first outer rim portion 101a and the second outer rim portion 101b in a state in which it is curved in the thickness direction so that the outer side in the tire radial direction C is convex, so as to fit along the plate-shaped support member 3 and the plate-shaped tread member 4. In this state, both ends of the plate-shaped reinforcing member 6 are attached to the first outer rim portion 101a and the second outer rim portion 101b.

[0077] As shown in Fig. 4, the plate-shaped reinforcing member 6 is disposed with its outer surface 31, which is its outer surface in the tire radial direction C, in contact with the inner surface 22 of the plate-shaped tread member 4. More specifically, as shown in Fig. 4, the outer surface 31 of the plate-shaped reinforcing member 6 in contact with the inner surface 22 of the plate-shaped tread member 4 over the entire area in the tire width direction A between the first outer rim portion 101a and the second outer rim portion 101b.

[0078] 4, the plate-shaped reinforcing member 6 is disposed with its inner surface 32, which is its surface on the inside in the tire radial direction C, in contact with the outer surface 11 of the plate-shaped support member 3. More specifically, as shown in FIG. 4, the inner surface 32 of the plate-shaped reinforcing member 6 in contact with the outer surface 11 of the plate-shaped support member 3 over the entire area in the tire width direction A between the first outer rim portion 101a and the second outer rim portion 101b. However, the plate-shaped reinforcing member 6 may in contact with the plate-shaped support member 3 only in a partial area in the tire width direction A between the first outer rim portion 101a and the second outer rim portion 101b (see FIG. 6).

[0079] When the plate-like tread member 4 comes into contact with the road surface and is pressed inward in the tire radial direction C, the plate-like reinforcing member 6 can deform inward in the tire radial direction C together with the plate-like support member 3 and the plate-like tread member 4. By providing such a plate-like reinforcing member 6, the plate-like reinforcing member 6 bears part of the load-bearing performance, so the plate-like tread member 4 can be configured to be more specialized for traction performance. For example, the plate-like tread member 4 can be configured to be thin and more easily follow the deformation of the plate-like support member 3 and the plate-like reinforcing member 6 in the tire radial direction C.

[0080] The annular body 201a also includes a plurality of plate-like reinforcing members 6. The plurality of plate-like reinforcing members 6 are arranged at different positions in the tire circumferential direction B. More specifically, the plurality of plate-like reinforcing members 6 are arranged in the tire circumferential direction B so that two adjacent plate-like reinforcing members 6 in the tire circumferential direction B do not overlap in the tire circumferential direction B, i.e., so as not to overlap in the tire radial direction C. The separation distance between two adjacent plate-like reinforcing members 6 in the tire circumferential direction B is not particularly limited, but it is preferable that they are arranged with a gap of 5 mm or less, for example, 1 mm. In this way, foreign objects such as sand on land that constitute the ground as the traveling road surface can be prevented from entering between two adjacent plate-like reinforcing members 6 in the tire circumferential direction B and into the inside of the tire radial direction C.

[0081] Moreover, the multiple plate-shaped reinforcing members 6 are disposed over the entire area in the tire circumferential direction B. The length of each plate-shaped reinforcing member 6 in the tire circumferential direction B is preferably a length that forms a central angle around the rotation axis of the tire 201 of 2 to 10°, and more preferably a length that forms a central angle of 2 to 5°. This makes it easier to ensure the deformation follow-up performance of the plate-shaped reinforcing members 6 when the plate-shaped support member 3 receives a ground contact load and elastically deforms in the tire radial direction C.

[0082] In particular, it is preferable that each plate-shaped reinforcing member 6 is not arranged so as to straddle the inner surfaces 22 of two plate-shaped tread members 4 adjacent in the tire circumferential direction B. In other words, it is preferable that each plate-shaped reinforcing member 6 is arranged so as to overlap only one plate-shaped tread member 4 in the tire radial direction C. Furthermore, it is preferable that each plate-shaped reinforcing member 6 is not arranged so as to straddle the outer surfaces 11 of two plate-shaped support members 3 adjacent in the tire circumferential direction B. In other words, it is preferable that each plate-shaped reinforcing member 6 is arranged so as to overlap only one plate-shaped support member 3 in the tire radial direction C. In other words, it is preferable that each plate-shaped reinforcing member 6 is arranged so as to overlap only one plate-shaped support member 3 and one plate-shaped tread member 4 in the tire radial direction C. In this way, it is possible to suppress the deformation of the plate-shaped support member 3 and the plate-shaped tread member 4 in the tire radial direction C being hindered by the presence of the plate-shaped reinforcing member 6 located between these plate-shaped support members 3 and plate-shaped tread members 4. As a result, the ability of the plate-like tread member 4 to deform relative to the plate-like support member 3 can be maintained.

[0083] As described above, the plate-shaped reinforcing member 6 extends between the first outer rim portion 101a and the second outer rim portion 101b in an arch shape so that the outer side in the tire radial direction C is convex. The plate-shaped reinforcing member 6 is a curved strip-shaped member that is spanned between the first outer rim portion 101a and the second outer rim portion 101b, similar to the plate-shaped tread member 4. The extending direction of the plate-shaped reinforcing member 6 shown in FIG. 4 is the same as the extending direction D of the plate-shaped support member 3 and the extending direction E of the plate-shaped tread member 4. The plate thickness of the plate-shaped reinforcing member 6 is not particularly limited, but is preferably thinner than the plate thickness of the plate-shaped support member 3. In addition, the plate thickness of the plate-shaped reinforcing member 6 is preferably thicker than the plate thickness of the plate-shaped tread member 4. By setting such a thickness relationship, it becomes easier to maintain the following deformation performance to the plate-shaped support member 3 while bearing a certain degree of load-bearing performance.

[0084] Although the plate-shaped reinforcing member 6 is a plate-shaped member constituted by a single plate material, it may be a plate-shaped member constituted by stacking a plurality of plate materials in the tire radial direction C, for example.

[0085] The plate-shaped reinforcing member 6 has one end 6a attached to the first outer rim portion 101a, the other end 6b attached to the second outer rim portion 101b, and a deformed portion 6c that is curved between the one end 6a and the other end 6b so as to be convex outward in the tire radial direction C. The one end 6a, the other end 6b, and the deformed portion 6c are composed of each part of a plate-shaped member that is integrally connected in the extending direction of the plate-shaped reinforcing member 6. The one end 6a of the plate-shaped reinforcing member 6 is arranged so as to cover the outer surface 111 of the first outer rim portion 101a, and is fixed to the first outer rim portion 101a together with one end 3a of the plate-shaped support member 3, one end 4a of the plate-shaped tread member 4, and one end 5a of the core member 5 by fastening members such as bolts 50. The other end 6b of the plate-shaped reinforcing member 6 is arranged so as to cover the outer surface 121 of the second outer rim portion 101b, and is fixed to the second outer rim portion 101b together with the other end 3b of the plate-shaped support member 3, the other end 4b of the plate-shaped tread member 4, and the other end 5b of the core member 5 by fastening members such as bolts 50. The deformed portion 6c abuts against the inner surface 22 of the plate-shaped tread member 4, i.e., the inner surface of the ground contact portion 4c of the plate-shaped tread member 4, over the entire area in the tire width direction A between the first outer rim portion 101a and the second outer rim portion 101b.

[0086] The details of the fixing configuration of the plate-shaped support member 3, plate-shaped tread member 4, core member 5 and plate-shaped reinforcing member 6 to the first outer rim portion 101a and the second outer rim portion 101b are the same as those of the above-mentioned tire 1, except that the plate-shaped reinforcing member 6 is interposed between the plate-shaped support member 3 and the plate-shaped tread member 4, and therefore will not be described here.

[0087] The plate-shaped reinforcing member 6 may be configured, for example, such that a flat plate-shaped member is elastically bent and deformed before being attached to the first outer rim portion 101a and the second outer rim portion 101b. The plate-shaped reinforcing member 6 may also be configured, for example, such that the plate-shaped member is attached to the first outer rim portion 101a and the second outer rim portion 101b after being shape-memorized in a predetermined curved shape. The predetermined curved shape may be, for example, a circular arc-shaped curved shape having a constant curvature, or may be a curved shape formed by combining multiple arcs of curvature.

[0088] As described above, in the plate-like reinforcing member 6 shown in FIG. 4, the one end 6a, the other end 6b, and the deformed portion 6c are configured by parts of plate-like members that are integrally connected in the extending direction of the plate-like reinforcing member 6, but the configuration is not limited to this. The plate-like reinforcing member 6 may be configured, for example, by separate plate-like members that are connected in the extending direction by rivets or the like. In other words, the one end 6a, the other end 6b, and the deformed portion 6c of the plate-like reinforcing member 6 may be configured by separate plate-like members that are connected in the extending direction. However, from the viewpoint of durability, it is preferable that the one end 6a, the other end 6b, and the deformed portion 6c are configured by parts of an integral plate-like member as shown in FIG. 4.

[0089] The plate-shaped reinforcing member 6 is made of a metal such as stainless steel, or a resin. The material of the plate-shaped reinforcing member 6 may be appropriately determined depending on the rigidity, deformation performance, durability, and the like required for the plate-shaped reinforcing member 6.

[0090] Next, a tire 301 as another embodiment of the tire according to the present disclosure will be described with reference to Fig. 5. Fig. 5 is a cross-sectional view of the tire 301 in the tire width direction. The tire 301 of this embodiment is different from the tire 201 (see Fig. 4) described above in that the number of annular bodies 201a is different, but the other configurations are the same. Here, the above differences will be mainly described, and the description of the configurations common to the tire 1 will be omitted.

[0091] As shown in Fig. 5, a tire 301 includes a plurality of (two in this embodiment) annular bodies 201a. The annular bodies 201a have the same configuration as that shown in Fig. 4. As shown in Fig. 5, the plurality of annular bodies 201a are arranged in parallel in the tire width direction A.

[0092] As shown in Fig. 5, two annular bodies 201a adjacent in the tire width direction A are joined by fastening the rim components 2 together using fastening members 106 such as bolts and nuts. More specifically, two annular bodies 201a adjacent in the tire width direction A are joined by fastening the outer rim portions 101 adjacent in the tire width direction A together using fastening members 106 such as bolts and nuts. That is, in this embodiment, the second outer rim portion 101b of one annular body 201a and the first outer rim portion 101a of the other annular body 201a are joined.

[0093] In this way, the tire 301 may be configured to include a plurality of annular bodies 201a arranged in parallel in the tire width direction A. The tire 301 of this embodiment includes two annular bodies 201a arranged in parallel in the tire width direction A, but the number of the annular bodies 201a is not limited to two. The tire 301 may include, for example, three or more annular bodies 201a. The number of the annular bodies 201a arranged in parallel may be appropriately determined according to the load-bearing performance required for the tire 301, etc. In other words, by forming the annular bodies 201a into one tire constituent unit that can be joined in parallel in the tire width direction A, the load-bearing performance required for the tire 301 can be easily realized by increasing or decreasing the number of the annular bodies 201a.

[0094] In the tire 301 of the present embodiment, a plurality of annular bodies 201a including the plate-like reinforcing member 6 shown in Fig. 4 are arranged in the tire width direction A, but the configuration is not limited to this. The tire 301 may have a configuration in which a plurality of annular bodies 1a not including the plate-like reinforcing member 6 shown in Figs. 1 to 3 are arranged.

[0095] Next, a tire 401 as another embodiment of the tire according to the present disclosure will be described with reference to Fig. 6. Fig. 6 is a cross-sectional view in the tire width direction of the tire 401. The tire 401 of this embodiment is different from the above-mentioned tire 1 (see Figs. 1 to 3), tire 201 (see Fig. 4), and tire 301 (see Fig. 5) in the configuration of the annular body 401a.

[0096] As shown in Fig. 6, the tire 401 includes at least one annular body 401a. More specifically, the tire 401 of this embodiment includes only one annular body 401a. As shown in Fig. 6, the annular body 401a of this embodiment includes a rim member 402, a plate-shaped support member 3, a plate-shaped tread member 4, a core member 5, and a plate-shaped reinforcing member 6.

[0097] The rim component 402 comprises a number of rim portions 100 arranged opposite each other in the tire width direction A. As shown in FIG. 6, the rim component 402 of this embodiment comprises four rim portions 100. More specifically, the rim component 402 of this embodiment comprises two outer rim portions 101 located on the outermost sides in the tire width direction A, and one or more (two in this embodiment) intermediate rim portions 102 located between these two outer rim portions 101. Hereinafter, for ease of explanation, the two outer rim portions 101 will be referred to as the "first outer rim portion 101a" and the "second outer rim portion 101b" in order to distinguish between them. In addition, in order to distinguish between the two intermediate rim portions 102, one intermediate rim portion 102 located relatively closer to the first outer rim portion 101a will be referred to as the "first intermediate rim portion 102a". Furthermore, the other intermediate rim portion 102 that is located relatively closer to the second outer rim portion 101b will be referred to as the "second intermediate rim portion 102b." When there is no particular distinction between the first outer rim portion 101a and the second outer rim portion 101b, they will simply be referred to as the "outer rim portion 101." When there is no particular distinction between the first intermediate rim portion 102a and the second intermediate rim portion 102b, they will simply be referred to as the "intermediate rim portion 102."

[0098] As shown in FIG. 6, the rim member 402 of this embodiment includes four flat annular plate members 103 each having an opening in the center, and a connecting member 105 that connects any two adjacent annular plate members 103 of the four annular plate members 103. The four annular plate members 103 are arranged facing each other at an interval in the tire width direction A. The connecting member 105 connects the two adjacent annular plate members 103 in a state in which the two adjacent annular plate members 103 are arranged facing each other at an interval. In this embodiment, the two annular plate members 103 located on the outermost sides in the tire width direction A constitute the outer rim portion 101. In this embodiment, the two annular plate members 103 located between the two annular plate members 103 located on the outermost sides in the tire width direction A constitute the intermediate rim portion 102. The rim member 402 may be configured to be mounted on a wheel member that can be mounted on a vehicle, for example.

[0099] The outer rim portion 101 and the intermediate rim portion 102 are made of metal such as stainless steel, or resin. That is, the four annular plate members 103 of this embodiment are made of metal or resin. The outer rim portion 101 and the intermediate rim portion 102 are each formed in a circular ring shape. The first outer rim portion 101a, the second outer rim portion 101b, the first intermediate rim portion 102a, and the second intermediate rim portion 102b are arranged at intervals in the tire width direction A so that their central axes are coaxial. In this embodiment, the first outer rim portion 101a, the second outer rim portion 101b, the first intermediate rim portion 102a, and the second intermediate rim portion 102b have the same size and shape. However, as long as they can function as the tire 401, the first outer rim portion 101a, the second outer rim portion 101b, the first intermediate rim portion 102a, and the second intermediate rim portion 102b may be configured to have different sizes or shapes. The outer diameters of the first outer rim portion 101a, the second outer rim portion 101b, the first intermediate rim portion 102a and the second intermediate rim portion 102b may be determined appropriately depending on the size of the tire 401 required.

[0100] The connecting member 105 is made of a metal such as stainless steel, or made of resin. The rim member 402 of this embodiment includes a plurality of connecting members 105 arranged at different positions in the tire circumferential direction B. The number of connecting members 105 is not particularly limited.

[0101] In addition, the configurations of each plate-shaped support member 3, each plate-shaped tread member 4, each core member 5, and each plate-shaped reinforcing member 6 of this embodiment are the same as those described in the other embodiment and modified example described above, so the description will be omitted here. In the other embodiment and modified example described above, each plate-shaped support member 3, each plate-shaped tread member 4, each core member 5, and each plate-shaped reinforcing member 6 are attached to two outer rim parts 101. In contrast, each plate-shaped support member 3 and each core member 5 of this embodiment are attached in an arch shape between at least one pair of two adjacent rim parts 100 among the two outer rim parts 101 and one or more intermediate rim parts 102. Specifically, each plate-shaped support member 3 and each core member 5 of this embodiment are attached to two adjacent outer rim parts 101 and intermediate rim parts 102. In addition, each plate-shaped tread member 4 and each plate-shaped reinforcing member 6 of this embodiment are attached to two outer rim parts 101 as in the other embodiment and modified example described above.

[0102] The annular body 401a of this embodiment includes a plurality of plate-shaped support members 3. The plurality of plate-shaped support members 3 of this embodiment include a first support member group 500a and a second support member group 500b.

[0103] The first support member group 500a is made up of multiple plate-like support members 3 attached in an arch shape at different positions in the tire circumferential direction B between one outer rim portion 101 and one of the one or more intermediate rim portions 102 that is adjacent to the one outer rim portion 101. Specifically, the first support member group 500a of this embodiment is made up of multiple plate-like support members 3 attached in an arch shape at different positions in the tire circumferential direction B between the first outer rim portion 101a and the first intermediate rim portion 102a.

[0104] The second support member group 500b consists of multiple plate-shaped support members 3 attached in an arch shape at different positions in the tire circumferential direction B between the other outer rim portion 101 and one or more intermediate rim portions 102 that is adjacent to the other outer rim portion 101. Specifically, the second support member group 500b of this embodiment consists of multiple plate-shaped support members 3 attached in an arch shape at different positions in the tire circumferential direction B between the second outer rim portion 101b and the second intermediate rim portion 102b.

[0105] As shown in Fig. 6, each plate-shaped support member 3 of the first support member group 500a is bridged between the first outer rim portion 101a and the first intermediate rim portion 102a in a state in which it is curved in the thickness direction so that the outer side in the tire radial direction C is convex. In this state, both ends of each plate-shaped support member 3 of the first support member group 500a are attached to the first outer rim portion 101a and the first intermediate rim portion 102a. As a result, each plate-shaped support member 3 of the first support member group 500a is configured to be flexible and elastically deformable in the tire radial direction C.

[0106] 6, each plate-shaped support member 3 of the second support member group 500b is curved in the thickness direction so that the outer side in the tire radial direction C is convex, and is bridged between the second outer rim portion 101b and the second intermediate rim portion 102b. In this state, both ends of each plate-shaped support member 3 of the second support member group 500b are attached to the second outer rim portion 101b and the second intermediate rim portion 102b. As a result, each plate-shaped support member 3 of the second support member group 500b is configured to be flexible and elastically deformable in the tire radial direction C.

[0107] In each of the first support member group 500a and the second support member group 500b, each plate-like support member 3 is configured to be able to elastically support the plate-like tread member 4 from the inside in the tire radial direction C via the plate-like reinforcing member 6. Therefore, each plate-like support member 3 can support a ground contact load via the plate-like tread member 4 and the plate-like reinforcing member 6.

[0108] In this way, the plate-shaped support member 3 is not limited to a configuration in which both ends are attached to the two outer rim parts 101. In addition, one end of each plate-shaped support member 3 in this embodiment is attached to the first outer rim part 101a or the second outer rim part 101b, but each plate-shaped support member 3 may be configured such that both ends are not attached to the two outer rim parts 101. In other words, the first outer rim part 101a and the second outer rim part 101b in this embodiment are used as a common outer rim part to which both the plate-shaped support member 3 and the plate-shaped tread member 4 are attached, but this configuration is not limited. However, from the viewpoint of weight reduction of the annular body 401a, etc., it is preferable that the two outer rim parts 101 to which the plate-shaped tread member 4 is attached are used as a common outer rim part.

[0109] Furthermore, as in this embodiment, a plurality of plate-like support members 3 covered by each plate-like tread member 4 may be arranged at different positions in the tire width direction A. In this embodiment, two plate-like support members 3 covered by each plate-like tread member 4 are arranged at different positions in the tire width direction A, but three or more may be arranged.

[0110] As shown in FIG. 6, the core members 5 can also be arranged in the same manner as the plate-like support members 3 described above.

[0111] Furthermore, the annular body 401a of this embodiment includes the plate-shaped reinforcing member 6 arranged along the inner surface 22 of the plate-shaped tread member 4, but is not limited to this configuration. The annular body 401a may be configured not to include the plate-shaped reinforcing member 6. Furthermore, the annular body 401a may be configured not to include the core member 5.

[0112] Furthermore, in the rim member 402 of the annular body 401a of this embodiment, the first intermediate rim portion 102a and the second intermediate rim portion 102b are arranged close to each other, but this is not limited to the configuration. In other words, the distance between the first intermediate rim portion 102a and the second intermediate rim portion 102b may be approximately equal to the distance between the first outer rim portion 101a and the first intermediate rim portion 102a, and the distance between the second outer rim portion 101b and the second intermediate rim portion 102b. In such a case, a plate-shaped support member 3 may be attached between the first intermediate rim portion 102a and the second intermediate rim portion 102b.

[0113] Furthermore, although the rim member 402 of this embodiment includes two intermediate rim portions 102, there may be three or more intermediate rim portions 102. Furthermore, the plate-shaped support member 3 may be attached between the entire space between any two adjacent rim portions 100.

[0114] The tire 401 of this embodiment includes only one annular body 401a, but may include a plurality of annular bodies 401a arranged in parallel in the tire width direction A.

[0115] The tire according to the present disclosure is not limited to the specific configurations shown in the above-described embodiment and modified examples, and various modifications, changes, and combinations are possible without departing from the scope of the claims.

[0116] [Contribution to the United Nations-led Sustainable Development Goals (SDGs)] The SDGs have been proposed to realize a sustainable society. An embodiment of the present disclosure is considered to be a technology that can contribute to the achievement of "No. 7 - Affordable and clean energy for all" and "No. 13 - Take concrete measures against climate change." [Industrial Applicability]

[0117] The present disclosure relates to tires. [Explanation of symbols]

[0118] 1, 201, 301, 401: tire, 1a, 201a, 401a: annular body, 2, 402: rim member, 3: plate-shaped support member, 3a: one end of plate-shaped support member, 3b: other end of plate-shaped support member, 3c: deformed portion of plate-shaped support member, 4: plate-shaped tread member, 4a: one end of plate-shaped tread member, 4b: other end of plate-shaped tread member, 4c: ground contact portion of plate-shaped tread member, 5: core member, 5a: one end of core member, 5b: other end of core member, 5c: main body of core member, 6: plate-shaped reinforcing member, 6a: one end of plate-shaped reinforcing member, 6b: other end of plate-shaped reinforcing member, 6c: deformed portion of plate-shaped reinforcing member, 11: outer surface of plate-shaped support member, 12: inner surface of plate-shaped support member, 21: outer surface of plate-shaped tread member, 21a: protrusion, 22: inner surface of plate-shaped tread member, 31: outer surface of plate-shaped reinforcing member, 32: inner surface of plate-shaped reinforcing member, 41: outer surface of core member, 50: bolt (an example of a clamping member), 60: clamping member, 60a: clamping portion, 61: cushioning member, 100: rim portion, 101: outer rim portion, 101a: first outer rim portion (an example of a common outer rim portion), 101b: second outer rim portion (an example of a common outer rim portion), 102: intermediate rim portion, 102a: first intermediate rim portion, 102b: second intermediate rim portion, 103: annular plate member, 105: connection member, 106: fastening member, 111: outer surface of first outer rim portion, 112: inner surface of first outer rim portion, 121: outer surface of second outer rim portion, 500a: first support member group, 500b: second support member group, A: tire width direction, B: tire circumferential direction, C: tire radial direction, D: extension direction of plate-shaped support member, E: extension direction of plate-shaped tread member, F: extension direction of core member, L1: tire circumferential length of plate-shaped support member, L3: tire circumferential length of plate-shaped tread member, L5: tire circumferential length of core member

Claims

1. At least one annular body; The annular body is A rim member including a plurality of rim portions disposed opposite to each other in a tire width direction; A plurality of plate-like tread members are attached in an arch shape between two outer rim portions located outermost on both sides in the tire width direction among the plurality of rim portions at different positions in the tire circumferential direction; a plurality of plate-like support members positioned radially inward of each of the plurality of plate-like tread members at different positions in the tire circumferential direction, attached in an arch shape between two of the plurality of rim portions, and capable of elastically supporting the plate-like tread member from the radially inward direction of the tire.

2. The tire according to claim 1 , wherein the plate-like tread member has a plurality of protrusions on an outer surface on an outer side in the tire radial direction.

3. The annular body includes a plurality of plate-shaped reinforcing members attached in an arch shape between the two outer rim portions to which the plurality of plate-shaped tread members are attached at different positions in the tire circumferential direction, The tire according to claim 1 or 2, wherein each of the plurality of plate-shaped reinforcing members is located between the plate-shaped support member and the plate-shaped tread member in the tire radial direction.

4. the annular body includes a plurality of core members attached in an arch shape between the two rim portions to which the plurality of plate-like support members are attached at different positions in the tire circumferential direction, The tire according to claim 1 , wherein each of the plurality of core members is disposed on an inner side of the plate-shaped support member in the tire radial direction.

5. The tire according to claim 1 or 2, wherein the plate-shaped support member is fixed at two or more positions to each of the two rim portions to which the plate-shaped support member is attached.

6. The tire according to claim 1 or 2, wherein the plate-like tread member is fixed at two or more positions to each of the two outer rim portions to which the plate-like tread member is attached.

7. At least one of the two outer rim portions to which the plate-like tread member is attached is a common outer rim portion that is common to at least one of the two rim portions to which the plate-like support member is attached, The annular body is a clamping member including a clamping portion that clamps and holds, between the common outer rim portion, an end portion of the plate-like tread member and an end portion of the plate-like support member located between the end portion of the plate-like tread member and the common outer rim portion; The tire according to claim 1 or 2, further comprising a buffer member interposed between the clamping portion of the clamping member and the end portion of the plate-like tread member.

8. 3. The tire according to claim 1, wherein the two outer rim portions to which the plate-like tread members are attached are two common outer rim portions that are common to the two rim portions to which the plate-like support members are attached.

9. the rim member of the annular body comprises one or more intermediate rim portions between the two outer rim portions; 3. The tire according to claim 1, wherein the plurality of plate-shaped support members are attached in an arch shape at different positions in the tire circumferential direction between at least one pair of adjacent two rim portions among the two outer rim portions and the one or more intermediate rim portions.

10. The plurality of plate-shaped support members include a first support member group consisting of a plurality of plate-shaped support members attached in an arch shape at different positions in the tire circumferential direction between one of the two outer rim portions and an intermediate rim portion adjacent to the one of the one or more intermediate rim portions; and 10. The tire according to claim 9, further comprising: a second support member group consisting of a plurality of plate-shaped support members attached in an arch shape at different positions in the tire circumferential direction between the other outer rim portion of the two outer rim portions and an intermediate rim portion of the one or more intermediate rim portions adjacent to the other outer rim portion.

11. The tire according to claim 1 or 2, wherein a plurality of the annular bodies are arranged in parallel in the tire width direction.

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