WO2001005607A1 - Tire device, tire forming method, and tire elements - Google Patents

Abstract

A tire device (1), comprising a hub part (2) supported rotatably on an axle, an annular wheel rim part (3) disposed around the hub part, and a tire disposed on the outer periphery of the wheel rim part, wherein the tire is provided with mounting holes passing through in the direction of the axle and formed of a plurality of tire elements (5) disposed circumferentially on the wheel rim part, mounting wall parts (7) extending in outward radial direction to hold the tire elements from both sides are installed on both outer peripheral sides of the wheel rim part, and both end parts of fitted shaft parts (10) which are fitted to the mounting holes of the tire elements are bridged supportedly to the mounting wall parts (7).

Description

 Description Tire device, tire configuration method and tire element

【Technical field】

 The present invention relates to a tire device. More specifically, the present invention relates to a tire device including a plurality of tire elements, a tire element included in the tire, and a tire configuration method.

[Background Art]

 A tire device used for a bicycle or the like has a hub portion rotatably supported on an axle, an annular wheel rim portion disposed so as to surround the hub portion, and is mounted on the wheel rim portion. Tires. The tire is integrally formed from an elastic material such as rubber formed in a hollow annular shape. The hollow interior is filled with compressed air via a rubber tube or directly to impart elasticity to the tire. The above-mentioned cutter is attached by fitting its inner peripheral edge into a concave portion formed on the outer peripheral portion of the wheel rim portion. For this reason, mounting and removing tires is troublesome. In addition, since the replacement and repair of tires requires special tools and specialized skills, users rarely replace or repair tires themselves. However, in the conventional tires described above, the compressed air is filled in one air chamber to impart elasticity to the tire, so that the tire cannot be run because only one hole is formed, and repair is required. .

 In order to solve the above problem, for example, a tire device that is configured by mounting a plurality of tire elements on a wheel rim portion has been devised, as disclosed in Japanese Utility Model Laid-Open No. 5-122202. I have. The tire device described in the above publication includes a plurality of ball-shaped tire elements detachably mounted around a wheel rim portion. In this tire device, even if one tire element is punctured, puncture repair can be performed only by replacing this tire element.

In the tire device described in the above publication, a plurality of tire elements are attached to the outer peripheral portion of the wheel rim using screws. Each tire element has an internal mounting A sabot member is provided in an embedded manner. A shaft extending from the sabot member is connected to the wheel rim by a screw, and a tire element is attached to the wheel rim.

 Since the tire element is formed integrally with the sabot member by insert molding, deformation and stress tend to concentrate on the edge of the support member. Therefore, it is difficult to construct high strength tire elements. In addition, since each tire element needs to maintain a predetermined size and shape at a predetermined pressure, a high level and accuracy are required, and the manufacturing cost increases.

 Furthermore, in the tire device described in the above-mentioned publication, all the forces acting upon contact with the ground, that is, the weight of the vehicle and all the forces acting upon traveling, are applied only to one tire element that is in contact with the ground. Works. Also, each tire element is supported by the wheel section only at the bottom. For this reason, impact mitigation performance, steering performance, brake characteristics, etc., are likely to decrease. In addition, since each tire element is independently attached to other tire elements, the elastic characteristics become discontinuous when rolling on the ground. Therefore, it is clear that the ride quality is reduced. In addition, there is a problem that the mounting strength and durability of each tire element with respect to the wheel rim are reduced.

DISCLOSURE OF THE INVENTION

 Each tire element according to the present invention can be easily attached to and detached from the wheel rim portion. Also, the mounting strength to the wheel rim is high. In addition, the force acting on each of the tire elements that contact the ground can be dispersed to prevent a decrease in ride comfort and steering performance, and to achieve an unprecedented design effect.

The present invention includes a hub portion rotatably supported by an axle and an annular wheel rim portion disposed around the hub portion, and is configured by mounting a hub around the outer periphery of the wheel rim portion. A tire device comprising: a plurality of tire elements each having a mounting hole penetrating in the axle direction and being arranged and mounted in a circumferential direction of the wheel rim portion; and an outer periphery of the wheel rim portion. At both sides, mounting walls are provided extending radially outward so as to sandwich the respective tire elements from both sides, and both ends of the fitting shafts fitted into the mounting holes of the respective tire elements are provided at both ends. It is configured to be supported in a bridging manner on the mounting wall.

 The vehicle to which the tire device according to the present invention can be applied is not particularly limited. It can be widely applied to motorcycles, bicycles, industrial vehicles, etc. in addition to ordinary automobiles. In particular, it is suitable for tires for vehicles running at low speed such as bicycles, wheelchairs, and forklifts.

 The hub portion is a portion connected to the axle of the vehicle, and the shape, structure, and the like are not particularly limited. The wheel rim is arranged so as to surround the hub, and the tire elements are arranged and fixed to an outer edge thereof. The connection structure between the wheel rim portion and the hub portion is not particularly limited, and may be connected using a spoke like a bicycle, or may be connected via a disc having a disc surface. Further, the wheel rim portion, the spoke portion, and the hub portion can be integrally formed of resin or the like.

 In the present invention, each tire element is formed with a mounting hole penetrating in the axle direction, and is connected and fixed to the wheel rim portion via a fitting shaft portion fitted into the mounting hole.

 Therefore, there is no need to provide a mounting member for each tire element for mounting, and the tire element can be formed only by an elastic member such as rubber. Therefore, not only the manufacture of each tire element is facilitated, but also the decrease in strength due to the insert molding of the above-mentioned sabot member does not occur.

 In addition, since the fitting shaft portion is supported in a bridging manner on the mounting wall portion extending along the side portion of each tire element, each tire element can be easily attached and detached. Therefore, even if some tire elements become punctured, they can be easily replaced. In addition, the tire elements having various colors and patterns added to the surface can be arranged as desired to exhibit a design effect.

Furthermore, both side surfaces, the bottom surface, and the inner peripheral surface of the mounting hole of each tire element are mounted in a state supported by the inner surface of the mounting wall portion, the outer peripheral surface of the wheel rim portion, and the outer peripheral surface of the fitting shaft portion, respectively. With this mounting structure, the tire element is held in a back-up state in a large area. Therefore, unnecessary deformation of each tire element is restricted, and running stability is improved. The form of each tire element according to the present invention is not particularly limited. For example, the tire element can be formed as a hollow with internal pressure applied. Alternatively, the entire tire element can be formed of a sponge-like solid elastic material.

 Preferably, the mounting wall is formed integrally with the wheel rim. For example, the wheel rim portion and the mounting wall portion can be integrally formed of resin. The invention described in claim 2 of the present application is characterized in that the fitting shaft portion is provided with a compression support member that abuts on the inner peripheral portion of the mounting hole and presses the shear element. It is. Each of the tire elements can be mounted in a compressed state by the compression supporting member. Therefore, the tire element formed only of the elastic material can be reliably positioned and connected and fixed to the wheel rim portion. Also, since the central part of each tire element can be positioned and fixed, the positioning accuracy is high.

 When a hollow tire element is adopted as the tire element, the compression support member allows the internal pressure to be adjusted without substantially changing the outer diameter of the tire element. For example, when a compression support member larger than the inner diameter of the mounting hole is forcibly fitted into the mounting hole, the periphery of the mounting hole is deformed and the internal pressure changes, but the outer peripheral portion of each tire element is hardly deformed. Therefore, the inner pressure of the tire element can be adjusted by adjusting the degree of compression of the compression support member without substantially deforming the outer shape of each tire element.

Further, the internal pressure of the tire element before mounting can be set low. After the tire element is mounted, the internal pressure of the tire element can be increased by adjusting the degree of compression of the compression support member. Therefore, not only can the tire element be easily attached / detached, but also it can be easily corrected even if the internal pressure of the tire element changes. In the invention described in claim 3 of the present application, the compression support member is provided on both sides of each of the tire elements, and the compression support members are brought close to each other, so that the edge of the mounting hole of the sunset element is provided. Alternatively, the inner peripheral portion is configured to be pressed. When the internal pressure of each tire element is increased by using the compression support member, the bottom of each tire element is brought into close contact with the outer peripheral portion of the wheel rim. Also, both sides of each of the tire elements are also brought into close contact with the mounting wall. This makes it possible to reliably hold each tire element in a positioned state. Also, the wheel rim And the tire elements are in close contact with each other, so that mud and sand do not enter between the tire elements and the wheel rim.

 The shape of the compression support member is not particularly limited, and may be any shape as long as it can abut on the edge or inner peripheral portion of the mounting hole to compress the tire element. For example, it can be formed in a hemispherical shape having a diameter larger than the inner diameter of the mounting hole. Also, it can be formed into an egg shape or triangular fiber shape.

 The invention described in claim 4 of the present application is provided with adjusting means capable of adjusting the pressing force of the compression support member on each tire element. As the adjusting means, for example, compression support members are provided on both sides of each tire element, and the compression support members are held close to each other by screws fitted in a bridging manner. be able to. By bringing the compression support members arranged on both sides of the tire element close to each other, the degree of fitting to the mounting hole can be increased, and the amount of elastic deformation near the mounting hole can be increased to increase the compression force.

 The invention described in claim 5 of the present application is one in which adjacent tire elements are brought into contact with each other and held in a state in which pressure acts. By contacting adjacent tire elements and applying pressure to each other, the force acting on each tire element from the ground can be dispersed and maintained. Therefore, it is possible to prevent the ride comfort and the steering performance from being reduced.

 On the other hand, according to the present invention, the air pressure of each tire element can be set low, and after mounting, the pressure can be increased by using the adjusting means. For this reason, the pressure acting between adjacent tires does not make it difficult to attach or detach each tire element. In addition, each tire element can be supported from all directions other than the ground contact surface, and the mounting strength and shock absorbing performance are improved.

 The invention described in claim 6 of the present application is a tire element that constitutes a tire by arranging and fixing it in a row on the outer periphery of a wheel rim portion of a wheel, wherein the mounting hole penetrates in the axial direction of the wheel. This is configured to be attached to the outer periphery of the wheel rim through the mounting hole.

 The invention described in claim 7 of the present application is configured such that the tire element is formed in a hollow shape and a predetermined internal pressure is applied thereto.

Although the outer shape of the tire element is not particularly limited, A rectangular parallelepiped shape formed on the surface can be adopted. The mounting hole is desirably formed in a circular shape in a side view.

 The invention described in claim 8 of the present application is directed to an inner tire element formed to be hollow and filled with compressed air, and an outer tire attached so as to cover an outer periphery of the inner tire element. And an element.

 By constituting the tire element from the inner tire element and the outer tire element, the tire device according to the present invention can be applied to various vehicle tire devices. Further, by configuring the outer tire element to be replaceable, one tire device can be applied to various uses. For example, as the outer tire element, one for off-road and one for on-road can be prepared and used in combination with the inner tire element according to the purpose of use. Also, the outer tire element can be formed from a wear resistant material to improve the tire's durability.

 The method for assembling the inner tire element and the outer tire element is not particularly limited. For example, as in a conventional tire having an inner tube, the inner tire element and the outer tire element can be assembled by the elasticity of compressed air. Further, an outer tire element may be bonded to an outer peripheral portion of the inner tire element by bonding or the like.

 Also, it is not necessary to provide an outer tire element over the entire inner tire element. For example, durability can be improved by providing an outer tire element only in a portion that contacts the ground. Further, the outer tire element is formed of a material having a rigidity as compared with the inner tire element, so that the outer tire element can be easily mounted on the wheel rim portion.

 In the invention described in claim 9 of the present application, the inside tire element is provided with a compressed air injection means, and the outside tire element is provided with an opening communicating with the compressed air injection means.

By providing the compressed air injection means to the inner tire element, the pressure of the inner tire element can be adjusted. For example, it is useful when adjusting the air pressure of the inner tire element when joining the inner tire element and the outer tire element using the elasticity of compressed air. In addition, by providing the outer tire element with an opening communicating with the compressed air injection means, the compressed air can be injected into the inner tire element. Can be easily performed. Furthermore, it is also possible to adopt a configuration in which compressed air can be injected into each of the inner skier elements with the tire element mounted on the wheel rim. The invention described in claim 10 of the present application is a method of forming a tire on the outer periphery of a wheel rim portion of a wheel, comprising: mounting a plurality of tire elements each having a mounting hole formed in an axle direction on the wheel rim. On the outer periphery of the wheel rim, the tires are positioned and held on the outer periphery of the wheel rim in a state where a compression force is applied to each of the tire elements by the compression support means fitted into the mounting hole while being arranged in an outer peripheral portion of the portion. It is composed.

 According to the above-mentioned method, it is possible to mount the tire elements while applying a predetermined elastic force to the tire elements. Thereby, each tire element can be reliably positioned and held.

 Also, as in the invention described in claim 11, a tire is formed by adopting a hollow tire element and adjusting the air pressure inside the hollow to a predetermined value by the compression support means. be able to.

[Brief description of the drawings]

 FIG. 1 is a perspective view showing the entirety of a tire device according to the present invention.

 FIG. 2 is a front view of a main part of the tire device shown in FIG.

 FIG. 3 is a perspective view showing a state where a tire element is removed from the tire apparatus shown in FIG. 1.

 FIG. 4 is a front view of a tire element.

 FIG. 5 is a sectional view taken along the line V--V in FIG.

 FIG. 6 is a plan view of the tire element shown in FIG.

 FIG. 7 is a sectional view taken along the line VII-VII in FIG.

 FIG. 8 is a sectional view taken along the line VIII-VIII in FIG.

 FIG. 9 is a front view showing a second embodiment of the coupling element of the present invention. FIG. 10 is a cross-sectional view taken along line Χ in FIG.

FIG. 11 is a sectional view taken along line XI-XI in FIG. BEST MODE FOR CARRYING OUT THE INVENTION

 In this embodiment, the present invention is applied to a bicycle tire device. As shown in FIG. 1, the tire device 1 includes a hub portion 2 rotatably supported by an axle (not shown), and an annular wheel rim portion 3 disposed around the hub portion 2. In this embodiment, a plurality of spoke portions 4 are provided radially between the hub portion 2 and the wheel rim portion 3 and a plurality of tire elements 5 are attached to the outer peripheral portion of the wheel rim portion 3 to form a set. 1.

 FIG. 2 is a front view of a main part of the above-described tire device 1, and FIG. 3 is a perspective view showing a state where the tire element 5 is removed from the tire device 1 shown in FIG.

 As shown in FIG. 3, the hub portion 2, the wheel rim portion 3, and the spoke portion 4 according to the present embodiment are integrally formed of a resin material. The hub portion 2 and the spoke portion 4 have the same structure as that of a conventional general tire device, and a description thereof will be omitted. The wheel rim portion 3 according to the present embodiment has an annular shape, and the inner peripheral portion is connected to the hub portion 2 via the spoke portion 4. On the other hand, an outer peripheral mounting surface 6 for mounting each tire element 5 and a plurality of mounting walls 7 are formed on the outer peripheral portion. As shown in FIG. 7, the outer peripheral mounting surface 6 has a cross section including the axle formed in a concave shape corresponding to the bottom shape of the connector element 5. As shown in FIG. 8, a bulging portion 8 for pressing each tire element 5 is formed at a circumferentially intermediate portion of a portion of the outer peripheral mounting surface 6 where the tire element 5 is arranged.

 As shown in FIG. 3, the mounting wall portion 7 is integrally formed so as to extend from the outer peripheral side edge portion of the wheel rim portion 3 and faces the outer peripheral mounting surface 6 so as to sandwich each tire element 5. Are arranged on both sides. A shaft hole 9 is provided at a tip end of the mounting wall portion 7, and an end portion of the fitting shaft portion 10 that supports the tire element 5 is supported.

As shown in FIGS. 4 to 6, the tire element 5 is formed in a hollow rectangular parallelepiped shape with rounded corners, and has an axle-direction mounting hole 11 formed in the center. . The tire element 5 is formed of a textile reinforcing rubber, and air is sealed therein at a predetermined pressure. Note that, in this embodiment, the air injection section is omitted. As shown in FIGS. 1 and 2, each of the tire elements 5 is attached to the outer peripheral mounting surface 6 so as to be sandwiched between the opposing mounting walls 7, 7 and fitted into the mounting holes 11. It is supported by the mounting walls 7 and 7 via the fitting shaft 10 to be formed.

 As shown in FIGS. 7 and 8, the fitting shaft portion 10 includes a pair of compression members 13 a, 1 b supported by the shaft holes 9 a, 9 b of the mounting wall portions 7, 7 on both sides. 3b, a bolt 14 and a nut 15 for connecting the compression members 13a and 13b in a bridging manner. Further, hemispherical pressing surfaces 20 and 20 having a diameter larger than the diameter of the mounting hole 11 are formed on the inner surfaces of the compression members 13a and 13b, respectively.

 In addition, one compression member 13 a has a cylindrical inner surface-shaped bolt receiving hole 16 and a through hole 17 for receiving the cylindrical head of the bolt 14. The other compression member 13b is provided with a nut hole 18 and a through hole 19 for accommodating the hexagon nut 15 so as not to rotate relatively. Insert a hexagon wrench into the hexagonal hole 21 formed in the head of the bolt 14 and rotate the bolt 14 relative to the nut 15 so that the pair of compression members 13 a, 1 3b can be moved closer and further away.

 Hereinafter, a method of mounting the tire element 5 will be described. First, the tire element 5 shown in FIGS. 4 to 6 is inserted between the mounting walls 7 and 7. Next, the compression members 13a and 13b are attached to the edge of the mounting hole 11 of the screw element 5 from the shaft holes 9 of the mounting wall portions 7 and Insert the bolts 14 and screw them into the nuts 15.

 As the bolts 14 are tightened, the pressing surfaces 20.20 of the pair of compression members 13a and 13b push the inner periphery of the mounting hole 11 and open the mounting hole of the tire element 5. 1 It is forcibly inserted into 1.

 Due to the forcible fitting of the compression members 13a, 13b into the mounting holes 11, the inner peripheral portion of the coupling element 5 is elastically deformed, and the internal pressure increases. Thus, the bottom of the evening element 5 is brought into close contact with the outer peripheral mounting surface 6, and both sides are brought into close contact with the inner surface of the mounting wall 7. Further, the outer surfaces of the adjacent tire elements 5 are also brought into close contact with each other, and as shown in FIG. 8, each tire element 5 is held in a state where it is positioned on the outer periphery of the wheel rim portion 3.

In the tire element according to the present invention, a sabot member for attachment is used for each tire. It is not necessary to provide the element 5 integrally with the element 5, and the coupling element 5 can be composed only of an elastic member such as rubber. Therefore, not only the manufacture of each tire element 5 is facilitated, but also the strength of the tire element 5 does not decrease due to the joining of the sabot members.

 Also, by attaching and detaching the bolts 14 and the nuts 15, each tire element can be attached and detached extremely easily.

 Also, as shown in FIGS. 7 and 8, both side surfaces, the bottom surface, and the inner peripheral surface of the mounting hole 11 of each tire element 5 correspond to the inner surface of the mounting wall portion 7 and the outer peripheral surface of the wheel rim portion 3. The surface 6 is attached to the pressing members 13a, 13b in a state of being in contact with the pressing surfaces 20 and 20, respectively. Therefore, each tire element 5 is held in a state of being backed up by a large area, and each tire element 5 can be reliably positioned and held. In addition, unnecessary deformation force is regulated, which increases running stability.

 Also, since the compression support members 13a and 13b deform the inner peripheral portion of the mounting hole of each tire element to perform compression, the outer shape of the tire element 5, especially the outer shape in the radial direction, is almost completely reduced. It is possible to adjust the internal pressure without changing. That is, the air pressure can be adjusted while the outer diameter of the wheel is kept substantially constant. For this reason, even if the air pressure of each tire element is slightly different, it is possible to mount the tire element 5, and the interchangeability of the tire element 5 is enhanced, and replacement can be extremely easily performed.

 If the internal pressure of the tire element before mounting is set low and the internal pressure is increased by adjusting the compression support members 13a and 13b after mounting, the mounting and dismounting becomes easier. Further, even if the internal pressure of the tire element changes during use, it can be easily corrected by adjusting the compression support members 13a and 13b. Further, in the present embodiment, as shown in FIG. 8, a bulging portion 8 is provided at the center of the outer peripheral mounting surface 6. By providing the bulging portion 8, the deformation of the bottom of each tire element 5 due to the tightening of the bolts 14 and the nuts 15 can be further increased, and the internal pressure can be easily adjusted.

9 to 11 show a second embodiment of the present invention. In these figures, the same members as those in the above-described embodiment are denoted by the same reference numerals. The tire element 50 according to the present embodiment includes an inner tire element 51 and an outer tire element 52. The inner tire element 51 is shown in Figs. 10 and 11. Thus, it is formed in a hollow annular shape. A compressed air injection portion 53 is provided inside the inner tire element 51 radially inward. On the other hand, an engagement convex portion 54 for engaging with the outer tire element 52 is formed radially outward of the inner tire element 51.

 The outer tire element 52 has a quadrangular side profile, and a concave portion 55 for accommodating the inner tire element 51 is provided inside. The recess 55 is formed such that the side surface of the inner tire element 51 is exposed. Further, an opening portion 56 communicating with the compressed air injection portion 53 of the inner tire element 51 is formed inside the outer tire element 52 in the radial direction. On the other hand, an engagement hole 57 with which the engagement protrusion 54 of the inner tire element 51 is engaged is formed radially outward.

 In the present embodiment, the durability of the tire is enhanced by forming the outer tire element 52 from a material having high wear resistance. In addition, even when the outer tire element is worn, the outer tire element can be easily replaced by bleeding air from the compressed air inlet. Also, various types of outer tire elements can be prepared and replaced according to the purpose.

 Further, the wheel rim portion 30 is provided with an opening portion 57 communicating with the compressed air injection portion 53 so that the air pressure of the inner tire element 51 can be adjusted while being attached to the wheel rim 30. A compressed air charging hose is connected to the compressed air injection section 53 through the opening 57 of the wheel rim 30 and the opening 56 of the outer coupling element 52, and the compressed air is supplied. Can be injected into the inner tire element 51 or the pressure can be reduced by bleeding compressed air. Thereby, the pressure of the tire element 50 can be easily adjusted.

 Further, in the present embodiment, the outer tire element 52 is configured to cover the outer periphery of the inner tire element 51, and the side surface of the inner tire element 51 is exposed from the outer tire element 52. I have. For this reason, by setting the outer tire element 52 and the inner tire element 51 to different colors, it is possible to give a design that has not been used before.

The present invention is not limited to the above embodiment. In the embodiment, Although the configuration is such that 36 identical tire elements are mounted on the outer periphery of the wheel rim portion 3 every 10 degrees, fewer or more than 36 tire elements can be provided. Also, a tire can be configured by combining a plurality of types of tire elements having different forms.

 Further, in the embodiment, the mounting wall 7 is provided integrally with the outer peripheral edge of the wheel rim 3, but may be formed by other means.

 Further, the material and form of the tire element are not limited. In the embodiment, it is formed in a substantially rectangular parallelepiped hollow shape. However, for example, it can be formed into a solid shape with an elastic material. Further, a structure in which a non-slip groove or a protrusion is formed on the outer peripheral portion may be configured. Furthermore, it is also possible to add a design effect by changing the coloring of each tire element.

Claims

The scope of the claims 1. It has a hub portion rotatably supported by the axle and an annular wheel rim portion disposed around the hub portion, and is configured by mounting a tire on the outer periphery of the wheel rim portion. A tire device,  The tire is composed of a plurality of tire elements each having a mounting hole penetrating in the axle direction and being arranged and mounted in the circumferential direction of the wheel rim portion,  On both outer peripheral sides of the wheel rim, mounting walls are provided extending radially outward so as to sandwich the tire elements from both sides,  A tire device, wherein both ends of a fitting shaft portion fitted into a mounting hole of each tire element are supported in a bridging manner on the mounting wall portion.  2. The tire device according to claim 1, wherein the fitting shaft portion includes a compression support member that abuts on an edge or an inner peripheral portion of the mounting hole to compress the tire element.  3. The compression support member is provided on both sides of each of the tire elements, and the compression support members are brought close to each other to compress the edge or the inner peripheral portion of the mounting hole of the tire element. An evening apparatus according to range 2.  4. The tire device according to claim 2, further comprising adjusting means for adjusting a compression force of the compression support member against each tire element.  5. The tire device according to claim 1, wherein adjacent tire elements are brought into contact with each other and held under pressure.  6. A tire element that constitutes a tire by arranging and fixing it in a row on the outer periphery of the wheel rim of the wheel,  A tire element, comprising: a mounting hole penetrating in the axial direction of the wheel, and configured to be mounted on an outer periphery of the wheel rim through the mounting hole.  7. The tire element according to claim 6, wherein the tire element is formed in a hollow shape and configured by applying a predetermined internal pressure. 8. The tire element includes an outer tire element formed to be hollow and filled with compressed air, and an outer tire element attached so as to cover the outer periphery of the inner tire element. 7. The tire element according to claim 6, comprising:  9. The tire element according to claim 6, wherein said inner tire element is provided with compressed air injection means, and said outer tire element is provided with an opening communicating with said compressed air injection means.  10. A method of forming a tire on the outer periphery of a wheel rim portion of a wheel, wherein a plurality of tire elements each having a mounting hole formed in an axle direction are arranged in a row on the outer peripheral portion of the wheel rim portion. on the other hand,  A method of constructing a tire by positioning and holding the outer periphery of the wheel rim portion in a state where a compressive force is applied to each of the above-mentioned screw elements by a compression supporting means fitted into the above-mentioned mounting hole; .  11. The tire construction method according to claim 10, wherein the tire is constructed by adopting a hollow tire element and adjusting the air pressure inside the hollow to a predetermined value by the compression supporting means.