JPH10324110A - Wheel tire with air tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel tire with an air tube for preventing the puncture of the air tube without deteriorating running stability. SOLUTION: An air tube having a small diameter is disposed in the space 3 of a crescent cross-section made on the side adhering to the ground in a tire 2 mounted on a rim 1, and the space 3 is filled with a foaming elastic material 6 having a crescent cross-section, and a thin layer 7 made of solid rubber or resin is disposed on the side adhering to the ground of the foaming elastic material 6 or the air tube 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire with an air tube for a wheel.

[0002]

2. Description of the Related Art A tire with an air tube of a wheel of a bicycle or a light vehicle has a drawback that a nail, a piece of glass, or the like is pierced or punctured by a rim while running. Conventionally, as a countermeasure, as shown in FIG. 3, the tire 2 having the base end 2a fitted to the rim 1 is filled with the foamed elastic body 13, or as shown in FIG. Air tube 14
There is a type in which a liquid puncture inhibitor 16 is injected from a container 15 inserted into the air valve 8.

[0003]

However, the former case shown in FIG. 3 has disadvantages such as poor assemblability of the tire 2 to the rim 1, poor rolling performance due to large rolling resistance, and poor cushioning. . In the latter case shown in FIG. 4, there are many punctures that cannot be prevented such as holes on the side of the tire and puncture punctures, although the running property and cushioning property are good. There was a problem that it became extremely difficult. In view of the above, it is an object of the present invention to provide a tire with an air tube for a wheel that prevents puncture of the air tube without impairing running performance and the like.

[0004]

In order to achieve the above object, a structure according to the present invention comprises, as shown in FIG. 1, an air gap having a substantially three-month cross section on the contact surface side in a tire 2 fitted on a rim 1. 3, a small-diameter air tube 4 is arranged, and the space 3 is filled with a foamed elastic body 6 having a substantially three-month cross section.
A tire having an air tube for a wheel, wherein a thin layer 7 of solid rubber or resin is disposed on the grounding surface side of the foamed elastic body 6 or the air tube 4. As shown in FIG. 2, a small-diameter air tube 10 is disposed in the tire 2 fitted on the rim 1, with a gap 9 having an annular cross section at substantially the center, and a foam having an annular cross section is formed in the gap 9. The elastic body 11 is filled and the thin layer 12 of solid rubber or resin is coated with the foamed elastic body 11 or the air tube 1.
A tire with an air tube for a wheel, wherein the tire is arranged on the side of a ground contact surface of the tire.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a first embodiment of the present invention, wherein 1 is a rim of a wheel, and 2 is a tire having a rim 1 fitted with a base end 2a. In the tire 2, a gap 3 having a substantially three-month cross section is provided on the ground contact side.
A small-diameter air tube 4 is arranged with a gap, and the base 4 a is attached to the rim 1 via a rim band 5. The space 3 is filled with a foamed elastic body 6 having a substantially three-month cross section made of closed cells made of rubber or thermoplastic elastomer (TPE), and the gap between the foamed elastic body 6 and the ground surface side of the air tube 4 is formed. In between, a thin layer 7 of solid rubber or resin is arranged. The thin layer 7 is adhered or integrally formed on one side of the foamed elastic body 6 or the air tube 4, but is preferably integrally formed on the foamed elastic body 6 side. In order to set the tire size, rolling resistance, weight, puncture resistance, and rim assemblability, the shape, apparent density and thickness of the foamed elastic body 6 or the position, thickness, material and the like of the thin layer 7 are determined. It is set in consideration of. 8 is an air valve.

FIG. 2 shows a second embodiment of the present invention.
In the tire 2 having the base end 2a fitted therein, a space 9 having an annular section is provided.
A small-diameter air tube 10 is disposed substantially at the center of the air tube. In addition, the space 9 is filled with a foamed elastic body 11 having an annular cross section, and a thin layer 12 of solid rubber or resin is disposed between the foamed elastic body 11 and the ground surface side of the air tube 10. ing. The thin layer 12 is also adhered to the foamed elastic body 11 or the air tube 10 or integrally molded as in the first embodiment. The following procedure can be considered as a rim assembling method in the second embodiment. First, the side opposite to the grounding surface of the hollow foamed elastic body 11 formed by integrally extruding the thin layer 12 is cut off or prepared in advance, and the air tube 10 is inserted from the cut-off portion and cut off. The part is closed with rubber glue or an instant adhesive, and then the rim is assembled.

The tire with an air tube constructed as in the first and second embodiments of the present invention has improved assemblability, reduced weight of the product, improved running performance due to reduced rolling resistance, and improved cushioning. There is an improvement in the performance, an adjustment of hardness by air pressure, an improvement in puncture resistance, and an improvement in puncture repair workability. It should be noted that the thin layers 7 and 12 have the same function and effect even if they are arranged not on the ground surface side of the air tubes 4 and 10 but on the ground surface side of the foamed elastic bodies 6 and 11. Examples of the rubber material used for the foamed elastic bodies 6 and 11 include styrene-based, olefin-based, PVC-based and urethane-based thermoplastic elastomer materials, and EPDM and CR-based rubber materials as the materials used for the thin layers 7 and 12. And PVC, PP and the like.

Among the various advantages described above, the air tubes 4 and 11, together with the foamed elastic bodies 6 and 11, are particularly suitable for penetration of nails and the like.
By forming the thin layers 7 and 12 of solid rubber or the like on 10, puncture resistance is remarkably improved, and safety due to a sudden air leak is improved. In the case of the second embodiment shown in FIG. 2, the rim band 5 as shown in FIG. 1 can be eliminated by integrally enclosing the air tube 10 by the gap 9 having an annular cross section. It is avoided that a hole is made in the air tube 10 by a driver or the like by mistake, and the assembling work by a beginner becomes easy.

[0009]

As described above, in the tire with an air tube for a wheel according to the present invention, a small-diameter air tube is arranged with a gap in the tire, and the above-mentioned gap is filled with a foamed elastic body. Since the thin layer is disposed between the air tube and the air tube, there is a feature that, unlike the conventional case, the running property, the assembling property, etc. can be improved, and the puncture of the air tube can be effectively prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of a tire with an air tube of a wheel according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a tire with an air tube of a wheel according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of a conventional wheel puncture tire.

FIG. 4 is a cross-sectional view of a tire with an air tube of another example of a conventional wheel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Rim 10 Air tube 2 Tire 11 Foam elastic body 3 Air gap 12 Thin layer 4 Air tube 6 Foam elastic body 7 Thin layer 9 Air gap

Claims (2)

[Claims] 1. A small-diameter air tube is disposed on a ground contact surface side of a tire fitted on a rim with a gap having a cross section of about three months, and a foamed elastic body having a cross section of about three months is placed in the gap. A tire with an air tube for a wheel, wherein the tire is filled and a thin layer of solid rubber or resin is arranged on the grounding surface side of the foamed elastic body or the air tube. 2. A small-diameter air tube is disposed in the tire fitted on the rim at a substantially central portion with a gap in an annular cross section, and a foamed elastic body having an annular cross section is filled in the gap.
A tire with an air tube for a wheel, wherein a thin layer of solid rubber or resin is arranged on the ground surface side of the foamed elastic body or the air tube.