JPH0730103U - Solid tire - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the production of solid tires that can be prevented from falling off due to centrifugal force. [Structure] A solid tire 2 is mounted on a rim 3 of a wheel 1, and includes a tire body 2a and a cloth belt 7. The tire main body 2a is a solid member containing vulcanized urethane rubber. The cloth belt 7 is a member having a lower expansion / contraction rate than the tire body 2a, which is vulcanized and adhered to the inner peripheral surface of the tire body 2a during vulcanization molding of the tire body 2a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a solid tire, particularly a solid tire mounted on a wheel rim.

[0002]

[Prior art]

 Generally, solid tires made of elastic material such as urethane foam rubber are used in relatively slow vehicles such as tricycles for children, hand carts for carrying luggage, and forklifts. Recently, solid tires for relatively fast bicycles and motorcycles have also been developed. In this type of solid tire for high-speed vehicles, when the tire rotates at high speed, the solid tire expands due to centrifugal force and its inner diameter increases, so the solid tire may fall off the rim. As a means for preventing this, it is known that a plurality of thread-shaped annular beads are mounted inside a solid tire (USP 4,446,903 etc.). In this solid tire, the solid tire is reinforced with beads, and the outward extension due to centrifugal force is restrained.

[0003]

[Problems to be solved by the device]

 In order to dispose the beads inside the solid tire in the above-described conventional structure, the beads must be embedded in appropriate places inside the solid tire and then vulcanization molded during vulcanization molding of urethane rubber, for example. As described above, in order to embed the beads in the appropriate places inside the tire, a complicated manufacturing process is required, which makes it difficult to manufacture the solid tire.

An object of the present invention is to easily manufacture a solid tire that can be prevented from falling off due to centrifugal force.

[0005]

[Means for Solving the Problems]

 The solid tire according to the present invention is mounted on the rim of a wheel and includes a tire main body and a belt-shaped member. The tire body is a solid member made of a vulcanized elastic body. The belt-shaped member is a member having a lower expansion / contraction rate than the tire main body, which is vulcanized and adhered to at least one of the inner peripheral surface and the inner peripheral side surface of the tire main body during vulcanization molding of the tire main body.

[0006]

[Action]

 In the solid tire according to the present invention, the band-shaped member is vulcanized and adhered to at least one of the inner peripheral surface and the inner peripheral side surface of the tire main body during vulcanization molding of the tire main body. Since this cloth-like member has a lower expansion / contraction rate than the tire main body, the cloth-like member restrains the elongation of the tire main body which tends to be expanded by the centrifugal force. Therefore, even if the solid tire rotates at high speed, it is difficult for the solid tire to fall off the rim. Such a solid tire can be manufactured simply by vulcanizing and adhering the belt-shaped member to at least one of the inner peripheral surface and the inner peripheral side surface of the tire main body, and therefore the solid tire is easy to manufacture.

[0007]

【Example】

 1 and 2, a bicycle wheel 1 according to an embodiment of the present invention has a rim 3 including a solid tire 2 and a pair of divided rim portions 3a and 3b for mounting a solid tire 2 thereon. And a hub 4 fixed to the center of the disk 4 and a disk 4 composed of two disks each having an outer peripheral portion sandwiched by a pair of divided rim portions 3a and 3b.

The solid tire 2 has, for example, a tire main body 2a having a ring structure in which a tread rubber layer having excellent impact resistance and abrasion resistance is provided on the ground contact side, and urethane foam rubber having a high cushioning property is filled inside the tread rubber layer. It has, and can be elastically deformed. The entire tire body 2a may be made of urethane foam rubber. A cloth belt 7 having a lower expansion / contraction rate than the tire body 2a is vulcanized and adhered to the inner peripheral surface of the tire body 2a. As the cloth used for the cloth belt 7, a cloth in which plain weave of chemical fibers is arranged in a bias shape, or a stretchable cloth such as a tricot in which weaving of chemical fibers is preferable. The expansion / contraction rate of this cloth is lower than that of the tire main body 2a as described above.

As shown in FIG. 3, the pair of left and right divided rim portions 3a and 3b forming the rim 3 are flat portions 10a on which the cloth belt 7 arranged on the inner peripheral surface of the tire main body 2a is arranged. , 10b, and flanges 12a and 12b that extend inwardly from one end of the flat portions 10a and 10b and support the inner circumferential side surface of the tire body 2a, and inwardly extend from the other ends of the flat portions 10a and 10b. It is composed of parts 11a and 11b. Mounting holes 16a and 16b for mounting the divided rim portions 3a and 3b to the disc 4 are formed in the mounting portions 11a and 11b at equal intervals in the circumferential direction.

As shown in FIG. 3, a mounting hole 17 is formed in the disk 4 at a position facing the mounting holes 16a and 16b. The mounting bolt 14 (FIG. 2) penetrates through the mounting holes 16a, 16b, and 17. A mounting nut 15 is screwed into the tip of the mounting bolt 14, and the split rim portions 3 a and 3 b are fastened to the disc 4 by the mounting bolt 14 and the nut 15. A hub 5 is fixed to the center of the disc 4. A hub shaft 20 is rotatably provided at the center of the hub 5.

Next, a method for manufacturing the solid tire 2 will be described. When manufacturing the solid tire 2, a tire body 2a, for example, a grounding side is provided with a tread rubber layer having excellent impact resistance and abrasion resistance, and urethane foam rubber having a high cushioning property is filled inside thereof. Prepare the tire material. The cloth belt 7 is arranged on the inner peripheral side of the tire material, and is vulcanized and molded by a vulcanizing press to manufacture the solid tire 2. Thus, when the cloth belt 7 is arranged on the inner peripheral surface of the solid tire 2 during the vulcanization molding, the cloth belt 7 is vulcanized and adhered to the inner peripheral surface of the solid tire 2. In the obtained solid tire 2 with the cloth belt 7, the elongation due to the centrifugal force at the inner peripheral portion is restricted by the cloth belt 7.

[0012] Here, since it is possible to obtain the solid tire 2 whose elongation is restricted only by vulcanizing and adhering the cloth belt to the inner peripheral surface during the vulcanization molding of the solid tire 2, it is possible to prevent the solid tire 2 from dropping due to centrifugal force. The solid tire 2 that can be prevented is easily manufactured. Next, a procedure for assembling the wheel 1 will be described. Before assembling the wheel 1, an assembly in which the disk 4 is fixed to the hub 5, the split rims 3a and 3b, and the solid tire 2 are prepared. At the time of assembly, first, the disk 4 is arranged on the inner peripheral side of the solid tire 2. Then, the divided rim portions 3a and 3b are arranged on both sides of them. Subsequently, the divided rim portions 3a and 3b are fastened to the disc 4 with the mounting bolt 14 and the nut 15. This completes the assembly.

Other Embodiments (a) As shown in FIG. 4, cloth belts 7a and 7b may be vulcanized and adhered to the inner peripheral side surface of the tire body 2a. (B) As shown in FIG. 5, the cloth belt 7c may be vulcanized and adhered to the inner peripheral surface of the tire main body 2a and both side surfaces on the inner peripheral side.

[0014]

[Effect of device]

 In the solid tire according to the present invention, the belt-shaped member is vulcanized and adhered to at least one of the inner peripheral surface and the inner peripheral side surface of the tire main body to restrain the elongation due to the centrifugal force, so that it does not fall off due to the centrifugal force. A solid tire that can be prevented can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a side view of a wheel adopting an embodiment of the present invention.

FIG. 2 is a partial front sectional view thereof.

FIG. 3 is a partial sectional view showing an assembly procedure.

FIG. 4 is a sectional view of a solid tire of another embodiment.

FIG. 5 is a cross-sectional view of a solid tire of still another example.

[Explanation of symbols]

 1 wheel 2 solid tire 2a tire body 7, 7a, 7b, 7c cloth belt

Claims (1)

[Scope of utility model registration request] 1. A solid tire mounted on a wheel rim, comprising a solid tire body made of a vulcanized elastic body, and at least one of an inner peripheral surface and an inner peripheral side surface of the tire main body. On the other hand, a solid tire comprising: a belt-shaped member that is vulcanized and bonded during vulcanization molding of the tire body and has a lower expansion / contraction rate than the tire body.