JP2896753B2 - No puncture tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-puncture tube, and more particularly to a structure of a non-puncture tube improved in workability in assembling into a rim member and suppressing occurrence of tire run-out during running. It is.

[0002]

2. Description of the Related Art Conventionally, a press-fitted tire rim provided with a moderate cushioning property, rigidity and durability by filling compressed air into a tube inserted into a cushion space in an assembly of a tire member and a rim member. The assembly has always had a problem that running becomes difficult or impossible when air such as nails or the like is pierced and air leaks from the tube.

[0003] In order to solve this problem, no-puncture tubes have been provided. Conventional non-puncture tubes are generally configured as shown in FIGS. That is, as shown in FIG. 2, the rubber foamed annular body 11 has a cross-sectional shape in a natural state in a teardrop shape or a heart shape partially shown by a dashed line, and as shown in FIG. The rubber foam annular body 11 is attached to a predetermined position on the concave portion 14a of the rim member 14 so that the lower tapered peripheral surface area B comes into contact with the rubber foamed annular body 11, and furthermore, the upper peripheral part thereof is inserted into the cushion space 15 of the tire member 12. The no-puncture tube 10 was arranged so as to cover the surface area A.

[0004]

As shown in FIG. 3, there is no particular problem if the no-puncture tube 10 is properly mounted at a predetermined position. When the torsion portion 15 is mounted on the concave portion 14a of the rim member 14 in a state where the torsion portion 15 is generated near the base portion of the lower tapered peripheral surface area B, as shown in FIG. This resulted in a poor mounting state such as peeling, and also caused a tire run-out during running.

[0005] Furthermore, the conventional no-puncture tube described above.
10 is a plan view of the lower tapered peripheral surface area B
14a, it is necessary to dispose it in close contact with the upper surface of the tire member 12. Therefore, it takes time for the attaching and detaching work, and the bead portion 13 of the tire member 12 is easily lifted by the press-fitting work. There was an easy defect.

Accordingly, an object of the present invention is to solve the above-mentioned drawbacks of the conventional no-puncture tube, and to provide a no-puncture tube which can be easily attached / detached and has increased running stability.

An object of the present invention is to provide a rubber foam annular body which is enclosed in a cushion space of a tire member so as to have a substantially circular cross section, a substantially circular, substantially semicircular, or crescent moon. Jo the formed rubber or resin molded annular body is mounted on the recess of the rim member, each separate, substantially collectively and the rubber foam annulus upwardly by the tire member independently the rubber or resin The molded annular body is contacted downward to form a space between the annular bodies.
This is achieved by a non- punctured tube that is built in and coated with a non-contact area that forms.

[0008]

The no-puncture tube of the present invention is used for a tire member.
In the cushion space, the cross-sectional shape is almost circular.
The rubber foam ring and the cross-sectional shape
It is formed in a substantially circular, semi-circular or crescent shape, and has a rim
Rubber or resin molded ring mounted on recess of material
However, each is separated and independently substantially simultaneously by the tire member.
And the rubber foam annular body upward, the rubber or
The resin molded annular body is brought into contact with the lower part,
Built-in and covered with non-contact areas forming a gap
Since made hardly occur twisted phenomenon as described above, even if an attempt twisting phenomenon about to occur, since the structure in which the foam rubber annular member and the rubber or resin molded annular body is independent of each other, an excess of one of the annular body Therefore, the lower peripheral surface area does not peel off from the peripheral surface of the rim member.

[0009] Further, a small amount of space is provided between the annular members which are substantially integrally incorporated by the tire member 12 in the cushion space of the tire member and in the vertical direction on the concave portion of the rim member. Since there is a non-contact area which forms a space, the tire itself is easily pressed and deformed by a normal tire lever to facilitate attachment and detachment of the tire itself.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the no-puncture tube according to the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the reference numerals of the respective constituent elements in the no-puncture tube of the present invention, which adopts the same configuration as the conventional no-puncture tube described with reference to FIGS. FIG. 1 shows a puncture tube 20 of the present invention mounted at a predetermined position on a concave portion 14a of a rim member 14. In particular, the rubber foamed annular body 11 having a substantially circular cross section is contacted upward, and the rubber molded annular body 21 having a substantially semicircular cross section is downwardly contacted. An assembly formed by covering the cushion member 15 with the tire member 12 in the cushion space 15 and on the concave portion 14a is provided instead of the tube body of the conventional tube-mounted tire.

The no-punched tube of the present invention configured as described above has the rubber foam annular body 11 having a substantially circular cross section and a substantially semicircular cross section. Since the rubber molded annular bodies 21 are separately formed and independently formed, even if the rubber molded annular bodies 21 are stored substantially collectively by the tire member 12, if they are placed under a twisting phenomenon like the conventional no-puncture tube 10, One ring 11 or 21
Is not excessively bent, and the lower peripheral surface area B is not separated from the concave portion 14a of the rim member 14.

Since there is a non-contact area between the annular members 11 and 21 which are substantially collectively incorporated in the tire member 12 and contact with each other in the vertical direction, there is a non-contact area which forms a small space 22, 24. It is easily pressed and deformed by the tire lever to facilitate attachment and detachment of the tire itself. The rubber molded annular body 21
The rim member 14 is preferably formed in a crescent shape, and a slight space 23 is provided in a contact area of the rim member 14 with the concave portion 14a, so that the rim member 14 is flooded from a spoke attachment portion or an air valve attachment hole. Is more effectively prevented.

[0013] The rubber foam annular body 11, which is a closed cell,
Alternatively, it may be a continuous cell. In addition, the rubber molded annular body 21 is not limited to having a substantially semicircular cross-sectional shape, a crescent shape, or a substantially circular cross-sectional shape, but is formed of a resin molded annular body and has a substantially circular, semicircular, cross-sectional shape. Or it may be crescent-shaped.

[0014]

The no-puncture tube 20 of the present invention described in detail above has the following novel effects.
That is, the no-puncture tube 20 of the present invention includes the rubber foamed annular body 11 having a substantially circular cross-sectional shape and the rubber or the semi-circular or crescent-shaped rubber having a substantially circular cross-sectional shape. The resin molded annular bodies 21 are separated from each other,
Since they are formed independently, even if they are housed substantially collectively by the tire member 12, the conventional no-puncture tube
When placed under a twisting phenomenon such as 10, one ring
No interference action such as excessive bending of 11 or 21 is made,
Since the lower tapered peripheral surface area B does not come off from above the concave portion 14a of the rim member 14, it is possible to suppress the occurrence of harmful tire runout during high-speed running.

Further, since there is a non-contact area between the annular bodies 11 and 21 which are substantially collectively incorporated in the tire member 12 and contact with each other in the vertical direction, the spaces 22 and 24 are slightly formed. The tire can be easily pressed and deformed by a normal tire lever, and the tire itself can be easily attached and detached. In addition,
The rubber or resin molded annular body 21 is preferably formed in a crescent shape in cross section to form a concave portion of the rim member 14.
By providing a small amount of the space 23 in the contact area with the upper part 14a, it is possible to more effectively prevent water from entering from the spoke attachment portion or the air valve attachment hole in the rim member 14.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of the entire no-puncture tube of the present invention.

FIG. 2 is a cross-sectional view of a main part of a conventional no-puncture tube.

FIG. 3 is a cross-sectional view of the entire conventional non-punctured tube.

FIG. 4 is a cross-sectional view illustrating a torsion phenomenon of a conventional no-puncture tube.

[Explanation of symbols]

11 Rubber foam ring 22, 23, 24
Space 12 Tire member 13 Bead part 14 Rim member 14a Depression 15 Twisted part 20 No puncture tube 21 Rubber or resin molded ring

Claims (1)

(57) [Claims] 1. A rubber foam annular body (11) sealed in a cushion space (15) of a tire member (12) so as to have a substantially circular cross section; It is formed in a semi-circular or crescent-shaped, rubber or resin molded annular body is mounted on the recess (14a) of the rim member (14) (21), each separating, independently
The rubber foamed annular body (11) is brought into contact with the rubber foamed annular body (11) upward, and the rubber or resin molded annular body (21) is brought downwardly in contact with the tire member (12 ).
A non- puncture tube (20) built in and covered with a non-contact area forming a space (22, 24) between them .