JPS6261808A - Flat preventive tire with reusable core and mounting method thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of inserting a core within a tire casing to provide a flat-proof tire, which provides a desired pressure against the tire casing. Therefore, it has a reusable core with compressible material within the casing.

The invention also particularly relates to a solid core for a casing that can be made from void-free elastomer before sulfur treatment. However, the provision of separate ring layers of cellular rubber concentrically in close contact with each other within the casing also provides easy installation and, if the casing becomes worn or damaged, easy removal and reuse.

For vehicles used in situations where "flattening" is likely to occur, tire casings filled with a material that prevents the tire from becoming flattened when the casing is punctured by an obstacle in the path of the vehicle are known. . In one known method, a wheel-mounted tire is filled via a valve with a urethane mixture that solidifies within the tire under suitable pressure to create a tight anti-flat bond. The urethane mixture is filled to the user's desired pressure and then allowed to solidify within the casing. In another known method.

After placing a predetermined amount of non-sulfur-treated foam rubber inside the casing and placing it on the wheel rim, the entire assembly is placed in an autoclave, where a rubber core forms and expands within the casing, forming a mass against the tire. to provide the desired running pressure.

A major disadvantage of the known method of filling the tire casing with urethane to give the tire its flat running properties is that the filler material is expensive and is lost as the tire wears and breaks. . Another drawback is that it is difficult for an inexperienced user to apply the proper pressure to each filled tire. The use of sulfur-treated rubber in tires is not a common technique for those in the field where repairing tires or installing tires on vehicles to replace damaged tires is a common practice. Therefore,
It requires that the core be prefabricated in a range of sizes to fit commercially available tire casings, and that such cores can be manufactured without any skill other than knowledge of manipulating common tire pressures. , there is a need for a method or apparatus for injecting into a variety of commercially available tires.

It is therefore an object of the present invention to provide a running flat tire for trucks and related heavy goods vehicles, which tire is made of high-density cellular rubber and is closely fitted and concentric. It has a core consisting of a series of rings,
The ring can be placed in the tire casing, and the core also consists of a connection that presses against the wheel rim so that even the special casing is subjected to the correct running pressure.

The core ring is mounted under pressure and is made from a material that is compressed within the casing and expands and fills the casing as the casing "swells" with use. Another object of the present invention is to provide a method of placing a core within a tire casing so that the core can be easily removed and reused after the tire casing becomes worn or damaged. Another object of the present invention is to provide a core having a multi-layer structure so that even if one layer or ring of the tire casing is damaged, the remaining ring can be saved and can be used again by removing it from the punctured casing. It is to provide. Furthermore, another object of the present invention is, for example, for small tires.
If the casing is placed in a larger casing and has a multilayer core therein, it is possible to combine the core with a running flat system. It is also possible to use the ring-shaped core of the invention instead of a solid core in flat running tires.

Yet another object of the present invention is to identify the type of foam rubber that provides the best results for various applications, such as in trucks and forklifts used outdoors or in factories.

The method for manufacturing reusable, puncture-resistant, anti-flat tires uses high-density, closed-cell foam rubber that has a wide pressure range to accommodate speed, load, and special casings. and molding a plurality of rings from rubber which, when tightly fitted together and concentrically within the tire casing, can fill the cavity of the tire casing. The outer surface of the ring snugly engages the inner surface of the tire cavity. When the rings come into contact with each other to fill the cavity, the wheel rim is compressed and the core ring and casing are forced together to reach a pressure condition that allows the casing to bulge during use.

In one aspect, the present invention provides an anti-flat tire comprising a tire casing and a tire core within the casing, the tire core comprising a plurality of separate concentric rings of elastomeric material. ing.

In another aspect, the present invention also provides a method for mounting the above-described anti-flat tire on a vehicle wheel.

The method involves sequentially inserting a number of separate, concentric rings made of elastomer material into the tire casing, and the tire casing compresses the tire core within the casing under the influence of tension. Tires to be placed
It consists of placing a tire casing with a core on the wheel.

Specific embodiments of the invention will now be described with reference to the accompanying drawings. In FIG. 1 a tire casing 10 is shown, the tire core being divided into four separate rings 11.12.13.
and 14, each ring made of high-density foam rubber and held under pressure by the rim 15 of the wheel 16. The tire casing 10 is pressed against the wheel 16 in the conventional manner of pressing against the rim of a truck tire and is held under tension by the engagement of the casing-flange 17 and the wheel rim 15. The core rings 11, 12, 13 and 14 are held under tension within the casing due to the tension within the casing. The rings 11, 12, 13 and 14 made of high-density foam rubber are flexible and can conform to the shape of the tire casing.

The proportions of the rubber cells molded into the ring, i.e. density, tensile strength, stiffness and elasticity, are all pre-calculated to yield the desired properties in terms of load, velocity, pressure and temperature conditions etc. imposed on the core.

Figure 2 shows the tire under load on the road surface 18 and also shows how the ring deforms to fill the cavity in the casing. According to FIG. 3, it can be seen that the rings are separately designed to engage each other and the side walls of the casing cavity.

Figures 4, 5, 6 and 7 show how to install the separate ring 11. The casing 10 has four straps 21
, 22, 23 and 24. To facilitate storage and transport, ring 11 can be elasticated with fasteners 25 and 26. The operator first pushes one end of the springed ring into the tire cavity 28 and then undoes the fastener 25 to spread the five ends 27 into engagement with the walls of the tire casing cavity 28. The other end 29 of the ring bundle is pushed into the cavity 28 and the fastener 26 is released as shown in FIG. The ring is then pressed by hand into a snug position against the inner wall of the tire cavity, optionally using a rubber mallet.
Press the foam rubber ring into the position shown in FIG. 6 with force. The remaining rings are fitted into the tire Φ casing in a similar manner in a suitable manner until the core fills the casing as seen in FIG. The core and casing are joined together by the wheel and rim pressing against the tire bead while compressing the ring of the core to provide the desired running pressure for the loaded tire.

It will be appreciated that a range of ring sizes are available in a range of similar commercially available tire casings, thereby allowing the installation of known ring sets to known casings.

It is well known that commercially there is virtually no standard size for casings, and that different manufacturers' casings have different dimensions even when they are intended to be mounted on the same rim. The core rings of the tires described herein are tailored to a manufacturer's casing, but - a set of core rings with a diameter of 10% of the cavity size;
This can be confirmed by reading the label that states that the l fits casings with approximately the same internal dimensions, within a range of error. Therefore, even a skilled worker needs to be aware of the margin of error before installing a set of rings on a particular casing.

Another embodiment of the invention is shown in FIGS. 8 and 9, in which the inner casing 30 has three rings 31, 32 and 33.
The inner casing 30 is pressed against the rim in the larger outer casing 34.

A space 35 between the casing 30 and the casing 34 is filled with pressurized air from a valve 36 3. Therefore, as shown in FIG.
0 and rings 31, 32 and 33 provide support in case the outer casing 34 is punctured. Figures 88 and 9a show one modification in which the bead 30a of the inner casing 30 is compressed into the bead 34a of the outer casing 34.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a tire casing having four rings within the casing and showing the arrangement of the tire core before being loaded. Figure 2 shows a ring that conforms to the tire cavity wall as the casing deforms after loading;
FIG. 3 is a cross-sectional view showing the rings that are in close contact with each other in the figure; FIG. Figures 4, 5, 6 and 7 are perspective views of the tire casing; Figures 4, 5, 6 and 7 are views showing how the tire casing is expanded to accommodate each ring and the rings of the core are sequentially installed; Figures 8 and 9 are cross-sectional views of the tire cores of Figures 1 to 3 used in conjunction with a running flat tire, with a small inner casing holding the core; Figures 88 and 9a are FIG. 2 is a cross-sectional view showing the bead of the inner casing being compressed and held within the bead of the outer casing. [Explanation of symbols of main parts] 10.30 ... Tire casing 11
, 12.13.14 ... Ring 16
... Wheel 34 ... External tire φ casing 3
5 ... Gap 〃63 Procedural amendment July 15, 1988 Director General of the Patent Office Michibe Uga 1 Indication of the case 1985 Patent Application No. 200408 2 Name of the invention Flattening prevention having a reusable core Tires and how to install them 3 Person making the amendment Relationship to the case: Name of patent applicant Name Vualhara Investments Limited 4 Agent (1) We will submit one copy each of a power of attorney and a translation. (2) Submit one copy of the application for correction in which the applicant's column in Paragraph 4 of the application submitted at the time of application is accurately filled out. (3) As shown in the attached sheet, we will submit one printable copy of the full statement. 7. List of attached documents (1) 1 copy of application for correction

Claims (1)

[Claims] 1. An anti-flat tire comprising a tire casing and a tire core within the tire casing, characterized in that the tire core comprises a plurality of separate and concentric rings made of elastomeric material. Anti-flat tire. 2. The anti-flat tire according to claim 1, wherein the elastomer material is a void-free elastomer that has not been treated with sulfur. 3. The anti-flat tire according to claim 1 or 2, wherein the elastomer material is foam rubber. 4. The anti-flat tire according to any one of claims 1 to 3, wherein the elastomer material is a high-density, closed-cell foam rubber. 5. Any one of claims 1 to 4, characterized in that the rings have a shape such that they are combined to sequentially fill the tire casing.
Anti-flat tire described in section. 6. In an anti-flat tire consisting of a tire casing and a tire core, the tire casing and tire core are
The tire core is placed within an outer casing, and there is a gap between the tire casing and the outer casing to allow air to enter. The anti-flat tire according to item 1. 7. A tire held under tension by the rim of a wheel.
In a wheel comprising the anti-flat tire according to any one of claims 1 to 5, which is placed on the wheel together with a casing, the tire core is compressed and sequentially fills the tire casing. A wheel characterized by: 8. A wheel consisting of a flattening tire according to claim 6, which is placed on the wheel together with a tire casing held by the rim of the wheel and an outer casing, in which the tire core is compressed and the tire core is compressed and the tire core is compressed. A wheel characterized by a filling casing. 9. Any one of claims 1 to 5
In the method of mounting an anti-flat tire on a wheel as described in paragraph 1, a plurality of separate and concentric rings made of elastomeric material are sequentially inserted into the tire casing, and the tire core is compressed within the casing. , placing a tire casing with a tire core on the wheel such that the tire casing is under the influence of tension; 10. A method for mounting an anti-flat tire on a wheel according to claim 6, comprising sequentially inserting a plurality of separate and concentric rings made of elastomeric material into a tire casing; placing a tire casing having a core within an outer tire casing; placing an outer tire casing having a tire core and a tire casing on a wheel; A method for mounting an anti-flat tire on a wheel, the method comprising: introducing air into a gap between the tire and the casing.