JP2000118204A - Segment tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably install a segment tire on a wheel, and to install the segment tire on a wheel of various diameters by embedding flexible core metal having a thread-mounting member in the bottom part, providing clearance when abutting to the wheel in an unmounted state, and providing the thread- mounting member in the circumferential directional, almost central part of the core metal. SOLUTION: Flexible metallic core metal 2 is embedded in the bottom part 1c, and a bolt 3 is welded to the central part of the core metal 2 as a thread- mounting member. The installing surface 4 of this core metal 2 is formed as the curved surface according to a minimum diameter of an installation expected wheel. The wheel 20 offered for installation has a diameter same as the minimum diameter of the expected wheel or larger than this, and clearance exists between the outer peripheral surface of the wheel 20 and the installing surface 4 of the core metal 2 before installation. When thread-mounting a segment tire by a nut 5, the curved surface of the core metal 2 gradually expands to eliminate the clearance, so that the outer peripheral surface of the wheel 20 and the installing surface 4 of the core metal 2 are finally installed in a close contact state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment tire which is bolted and nut-fastened to a wheel, wherein no gap is formed between the segment tire and the wheel.
The present invention relates to a segment tire that can be mounted regardless of the diameter of the tire.

[0002]

2. Description of the Related Art In recent years, it has been proposed to form a wheel by mounting a segment tire on the outer peripheral surface of a wheel.
In the conventional tire, a gap is apt to be formed in the circumferential direction of the segment tire, and if this gap is present, bolt fastening is loosened and segment mounting failure occurs. Therefore, if the diameter of the wheel is different, all the segment tires must be manufactured differently, which is extremely inconvenient.

FIG. 4 is a view showing this conventional segment tire. A core bar 33 is usually embedded in a bottom portion 32 of a segment tire 30 made of a rubber elastic body 31. A curved surface 34 is formed in accordance with the outer diameter of the core bar 33. The curved surface 34 is mounted on the outer peripheral surface of a predetermined wheel 40. The front and rear are lifted and a gap is created on the mounting surface of the segment tire. Hoists with other diameters
It could not be mounted on a car, and each required its own segment tires. Reference numeral 37 denotes a hollow portion formed in the rubber elastic body 31, and reference numeral 38 denotes a stopper provided in the hollow portion 37 and made of rubber elasticity.

[0004]

The segment tire of the present invention has a core metal embedded in a rubber elastic body and has a special shape. The segment tire is securely mounted on the wheel and various types of tires are provided. An object of the present invention is to provide a segment tire which can be mounted on a wheel having a diameter.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its gist is a segment tire which is mounted on an outer peripheral surface of a wheel to form a wheel. The core has a structure in which a core having a screw member is embedded in the bottom portion of the segment tire. The core has flexibility, and when it comes into contact with the wheel in an unscrewed state, the periphery of the core is formed. A gap is provided at a substantially central portion in the direction, and a screwing member provided on the cored bar is provided substantially at the center of the cored bar in the circumferential direction. Scheduled Hoi
The mounting surface of the core metal is curved with a curvature smaller than the curvature of the screw, and the screw member is applied to a segment tire having a bolt and a nut.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a segment tire having the above-described structure, and particularly to a core metal embedded in a rubber elastic body which has flexibility and which is not screwed. −
A gap is provided at a substantially central portion in the circumferential direction of the metal core when the metal core is in contact with the wheel, and the mounting surface of the metal core is curved with a curvature smaller than the curvature of the wheel to be mounted. In other words, the core is mounted without deformation when mounted on the wheel with the smallest diameter, and the bolt and nut are mounted on the wheel with the larger diameter. As the screw is screwed in, the curved surface of the core metal expands, and a gap is initially formed between the outer peripheral surface of the wheel and the mounting surface of the core metal. The curved surface of the gold comes into contact and is mounted. Conversely, if the core is mounted on a wheel that is smaller than the intended diameter of the mounting wheel, a gap will remain at the end of the core, and mud will clog here, causing problems. Will occur.

In the present invention, a rolled iron plate is used for the core metal, or FRP (fiber reinforced plastic) other than metal is used.
Or a resin plate other than CFRP (carbon reinforced plastic).

The screw member is usually a bolt,
It is erected from the mandrel, inserted into the bolt hole opened in the wheel, and screwed with a nut. Conversely, a cap nut may be welded to the mandrel and screwed with a bolt. . Furthermore,
In some cases, a gap may be formed inside the metal core, and a nut may be inserted and bolted at the time of mounting.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The segment tire of the present invention will be described below in more detail with reference to the drawings. FIG. 1 is a cross-sectional view of a segment tire 10 of the present invention.
0 is a rubber elastic body, 1a is a crown part, 1
b is a side part, and 1c is a bottom part. In the figure, 1d is a hollow portion, and 1e is a stopper portion.

A flexible metal core 2 is embedded in the bottom portion 1c, and is used as a screw member.
The bolt 3 is welded to the center of the. The mounting surface 4 of the metal core 2 has a curved surface in accordance with the minimum diameter of the wheel to be mounted.

The wheel 20 to be mounted has a diameter equal to or larger than the minimum diameter of the wheel to be mounted.
Although there is a gap P between the outer peripheral surface of the metal core 0 and the mounting surface 4 of the metal core 2, when the nut 5 is screwed in, the curved surface of the metal core 2 gradually widens and this gap P disappears. As shown in FIG. 2, the outer peripheral surface of the wheel 20 and the mounting surface 4 of the cored bar 2 are mounted in close contact with each other.

FIG. 3 shows another segment tire 10 of the present invention.
In this example, a cap nut 6 is used as a screwing member, and a bolt 7 is inserted from the inside of a wheel 20 and attached.

[0013]

As described above, the present invention has been described above, and there is no gap in the mounting surface with the wheel, and the bolt fastening is not loosened, so that the segment tire can be securely fixed to the wheel. In addition, a segment tire that can be mounted on most wheels is obtained, and is extremely practical.

[Brief description of the drawings]

FIG. 1 is a sectional view of a segment tire of the present invention.

FIG. 2 is a sectional view when the segment tire of FIG. 1 is mounted on a wheel.

FIG. 3 is a sectional view showing another example of the segment tire of the present invention.

FIG. 4 is a sectional view of a conventional segment tire.

[Explanation of symbols]

 1 rubber elastic body, 1a crown part, 1b side part, 1c bottom part, 1d hollow part, 1e stopper part, 2 core metal, 3 bolt, 4 core metal mounting surface, 5 ‥ nut, 6 cap nut, 7 ‥ bolt, 10 ‥ segment tire, 20 ‥ wheel.

Claims (3)

[Claims] 1. A segment tire mounted on an outer peripheral surface of a wheel to form a wheel, wherein a core having a screw member is embedded in a bottom portion of the segment tire, and the core is formed of a metal. It is flexible, has a gap at a substantially central portion in the circumferential direction of the core when it comes into contact with the wheel in an unscrewed state, and a screw member provided on the core has a A segment tire provided substantially at the center in the circumferential direction. 2. The segment tire according to claim 1, wherein the core metal mounting surface is curved with a curvature smaller than the curvature of the wheel to be mounted. 3. The segment tire according to claim 1, wherein the screw member is a bolt and a nut.