JP3497277B2 - Method for producing tube for use in tubed tire - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a tube for a tire having a tube, the tube including a tire and a tube which is housed in the tire to form a ring-shaped air chamber.

[0002]

2. Description of the Related Art A tire with a tube is mounted on a wheel with a wire spoke that is widely used in motorcycles and bicycles because the tube has a good airtightness.

By the way, general tires with tubes are
When the tube is stabbed by a nail or the like, the air inside the tube easily leaks from the stab wound to the outside through the nipple hole of the rim through the minute gap between the tire and the tube, and a so-called punctured state is likely to occur.

Therefore, it has been conventionally known to inject an appropriate amount of a liquid sealing agent in advance into a tube for automatically repairing the tube when the tube is punctured.

[0005]

However, in the case where the liquid sealant is injected into the tube as described above,
There is a drawback that the sealant clogs the air valve of the tube or the pressure gauge when measuring the air pressure in the tube.

[0006] The present invention is a tubing tire for use in a tubed tire which can perform an emergency repair function without the above-mentioned drawbacks of the prior art.
It is an object of the present invention to provide a method for manufacturing a tube .

[0007]

To achieve the above object of the Invention The present invention includes a tire, Ri Do and a tube housed in the tire to form an air chamber of annular, the Chu <br/> constituted by a bag-shaped portion which is closed at least the outer peripheral wall of the probe, formed by sealing a liquid sealing agent into the bag-like portion Chu
A method for manufacturing a tube used for a tire with
Form a tube with a bag-shaped part,
The opposite faces of the bag-shaped portion are closely adhered to each other and vulcanized and molded.
After vulcanization and molding, liquid seal in the bag-shaped part in close contact
The first feature is to inject the agent .

Further, the present invention comprises a tire and a tube housed in the tire to form a ring-shaped air chamber.
Manufacturing of a tube for a tire with a tube, in which the left and right side walls and the outer peripheral wall of the tube are formed of a sealed bag-shaped portion, and a liquid sealing agent is enclosed in the bag-shaped portion.
A method of forming a tube having the bag,
Put the tube into close contact with the facing surfaces of the bag.
Vulcanization and molding, and after the vulcanization and molding, the bag-shaped
The second feature is to inject a liquid sealing agent into the inside of the portion.

[0009] The present invention further switch of claim 1 or 2, wherein
It is a method of manufacturing tubes used for tubed tires.
The tube is composed of a tube body that forms a ring-shaped air chamber, and a ring-shaped bag body that surrounds the tube body and that is adhered to the outer surface of the tube body to form the bag-shaped portion that is hermetically sealed. The third feature is that it is configured.

The present invention also relates to claim 1 or 2.
This is a method of manufacturing tubes used in
Thus, the fourth feature is that the tube having the bag-shaped portion is integrally molded . Furthermore, the present invention provides claims 1 to
The chew used for the tire with a tube according to any one of 4 above.
A method for manufacturing a tube, wherein the bag-shaped portion
A fifth feature is that the surface is formed on the outer side in a substantially half circumference in the radial direction .

[0011]

[Operation] According to the first feature of the present invention, at least the outer peripheral wall of the tube is constituted by the bag-shaped portion in which the liquid sealing agent is sealed, so that even if the tube is stabbed through the tread portion of the tire, A sealant fills the sting and repairs it immediately. Moreover, since the sealant is held in the bag,
Does not clog the tube air valve or pressure gauge. In addition, when manufacturing the tube,
Tube, and place the tube in the bag
After vulcanization and molding, they are in close contact with each other.
A liquid sealant is injected into the bag-shaped portion of the state.

Further, according to the second aspect of the present invention, the left and right side walls and the outer peripheral wall of the tube are constituted by a bag-shaped portion in which a liquid sealant is enclosed, and the air pressure in the tube extends along the inner surface of the tire. Since the sealant is held in a curved shape, it is possible to prevent the sealing agent from being biased to one place by centrifugal force. Therefore, even if the tube receives a puncture not only in the radial direction but also from the side, the sealant fills the puncture and repairs it immediately. Also in this case, the sealant in the bag-shaped portion does not clog the air valve or pressure gauge of the tube. Also of the tube
During manufacture, a tube with a bag-like part is formed and
The tube is vulcanized with the bag-shaped parts facing each other
After molding and vulcanization molding, liquid in the bag-shaped part in close contact
Inject the sealant.

Further, according to the third aspect of the present invention, the bag-shaped portion having a high hermeticity can be easily formed only by adhering the outer surface of the tube body to the ring-shaped bag.

According further to the fourth aspect of the present invention, the
A tube having a bag portion is integrally molded. Furthermore, according to the fifth feature of the present invention, the bag-shaped portion is
It is formed approximately on the outer side in the radial direction of the cross-section of the bush.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

First, the first embodiment of the present invention shown in FIG. 1 will be described. A rim R of a motorcycle wheel is connected to a hub (not shown) via wire spokes. A tire T with a tube including a tire 1 and a tube 2 accommodated therein is mounted on the rim R. Tube 2
Is a tube main body 4 that integrally connects the inner and outer peripheral walls 4i and 4o and the left and right side walls 4s and 4s to form a ring-shaped air chamber 3, and both end portions 5 that surround the tube main body 4.
a and 5a are formed on both side walls 4s of the tube main body 4 and a ring-shaped strip 5 having a U-shaped cross section which is adhered to an intermediate portion of the tube main body 4, and an air valve 6 is attached to an inner peripheral wall 4i of the tube main body 4. The air chamber 3 is filled with air via the above. This ring 5
Is molded with the same material as the tube body 4. Also ring 5
Forms a sealed bag-like portion 7 together with the outer peripheral wall 4o and both side walls 4s, 4s of the tube body 4 facing this, and a known liquid sealant 8 is enclosed in the bag-like portion 7.

In molding the bag-shaped portion 7 as described above, a mold release agent is applied to the inner surface of the ring-shaped strip 5 except for both end portions 5a, 5a to be adhered, and this is applied to the tube body 4. Adhere closely and vulcanize integrally. The sealing agent 8 is injected into the bag-shaped portion 7 in the thus-adhered state obtained by a syringe or the like, and the bag-shaped portion 7
To inflate properly.

Next, the operation of this embodiment will be described. The bag-shaped portion 7 of the tube 2 constitutes the left and right side walls and the outer peripheral wall of the tube 2, and the air pressure of the air chamber 3 extends along the inner surface of the tire 1. Will be held in a
Since the sealing agent 8 is enclosed in the bag-shaped portion 7 as described above, it is possible to prevent the sealing agent 8 from being biased toward the outer peripheral side of the tube 2 due to centrifugal force during rotation of the wheel. Therefore, even if the tube 2, that is, the bag-shaped portion 7 is punctured by the nail or the like from the radial direction or the side, the sealant 8 immediately fills the puncture and repairs it, and delays the leakage of air from the air chamber 3.

Further, since the sealant 8 is held in the bag portion 7 and does not flow out to the air chamber 3 side, the air valve 6
It does not clog pressure gauges applied to it.

FIG. 2 shows a second embodiment of the present invention.
The configuration is the same as that of the previous embodiment except that the tube 2 having the bag-shaped portion 7 is integrally molded. In the drawings, the same reference numerals are given to the portions corresponding to those of the previous embodiment.

FIG. 3 shows a third embodiment of the present invention.
The configuration is the same as that of the first embodiment except that a large number of protrusions 9, 9 ... Raised from one of the opposing surfaces of the ring-shaped band 5 and the tube body 4 are bonded to the other opposing surface. , First
The same parts as those in the embodiment are designated by the same reference numerals.

According to this embodiment, the thickness of the bag-shaped portion 7 can be regulated by the large number of projections 9, 9.

FIG. 4 shows a fourth embodiment of the present invention.
The tube 2 includes a tube body 4 that forms a ring-shaped air chamber 3 inside, and a ring-shaped bag that surrounds the tube body 4 and is adhered to the outer surfaces of the outer peripheral wall 4o and the left and right side walls 4s, 4s over the entire circumference. The ring-shaped bag body 11 is made of the same material as the tube body 4 and is molded in a hermetically sealed manner. The ring-shaped bag body 11 and the outer peripheral wall 4a and the side walls 4s, 4s of the tube body 4 bonded to the ring-shaped bag body 11 form a bag-shaped portion 7 that is sealed. In this case, the inner peripheral wall of the bag-shaped portion 7 is bonded to each other by the tube body 4 and the ring-shaped bag body 1.
The liquid sealing agent 8 is injected into the ring-shaped bag body 11.

The other structure is the same as that of the first embodiment shown in FIG. 1, and in the figure, the parts corresponding to those of the first embodiment are designated by the same reference numerals.

According to this embodiment, since the ring-shaped bag body 11 is preliminarily molded separately from the tube body 4 so as to be hermetically sealed, a bag-shaped body having a high degree of tightness can be obtained only by adhering this to the outer surface of the tube body 4. The part 7 can be easily obtained.

FIG. 5 shows a first reference example, in which a general-purpose tube 2 is stretched from the left and right side walls to the outer peripheral wall of the tire 1.
Is adhered to the inner surface of the adhesive with the adhesive 10,
The parts corresponding to those in the first embodiment are designated by the same reference numerals. In this reference example, when the tire 1 and the tube 2 receive a puncture wound from the radial direction or the side, the tire 1 self-repairs the puncture wound due to its strong contraction elasticity, but the tube 2 has such self-repair ability. weak. However,
Since the area around the sting of the tube 2 is adhered to the inner surface of the tire 1, the air inside the tube 2, that is, the air in the air chamber 3 cannot spread to the surroundings even after passing through the sting of the tube 2, and therefore the sealing agent is used. It is possible to delay the leakage of air from the air chamber 3 without using.

Since the inner peripheral wall side of the tube 2 is not adhered to the tire 1, as shown in FIG. 6, when the tire 1 is mounted on the rim R, the inner peripheral wall side of the inner tube 2 is enlarged from the rim R. By letting it escape, the tire 1 can be mounted without any trouble.

FIG. 7 shows a second reference example, in which the tube 2 is formed in a U-shaped cross-section with the outer peripheral side open, and the left and right side walls of the tube 2 are adhered to the inner surface of the tire 1 with an adhesive agent 10. The structure is the same as that of the first reference example except that an air chamber 3 for filling air is formed between the tube 2 and the tube 2. In the drawing, the same reference numerals are given to the portions corresponding to the first reference example. . Also in this reference example, similarly to the first reference example, it is possible to delay the leakage of air from the air chamber 3 due to a puncture wound.

In each of the above embodiments, various design changes can be made without departing from the gist of the present invention. For example, in the embodiment of FIGS. 1 to 4, only the outer peripheral wall of the tube 2 may be the bag-shaped portion 7 .

[0030]

As described above, according to the first feature of the present invention, at least the outer peripheral wall of the tube is constituted by the sealed bag-shaped portion, and the liquid sealing agent is enclosed in the bag-shaped portion. The puncture wound on the tube through the tread portion of the tube can be repaired with the sealant, and the clogging of the air valve etc. due to the sealant can be prevented. In addition, when manufacturing the tube,
Tube, and place the tube in the bag
After vulcanization and molding, they are in close contact with each other.
A liquid sealant is injected into the bag-shaped portion of the state.

Further, according to the second feature of the present invention, since the left and right side walls and the outer peripheral wall of the tube are constituted by a sealed bag-like portion, and the liquid sealing agent is enclosed in the bag-like portion, the radius of the tube is reduced. The puncture wound from the direction and the side can be appropriately repaired by the sealant in the bag portion, and the clogging of the air valve or the like due to the sealant can be prevented. Well
Tube with a bag-shaped part
To form a tube, and then place the tube on the facing surfaces of the bag
After vulcanization and molding, the bag is in close contact after vulcanization and molding.
A liquid sealant is injected into the shaped part.

Further, according to a third aspect of the present invention, the tube is a tube body forming a ring-shaped air chamber,
Since the tube body is surrounded by the ring-shaped bag body which is adhered to the outer surface of the tube body and is hermetically sealed so as to form the bag-shaped portion, the ring-shaped bag body which is previously sealed is used. Therefore, a bag-shaped portion having a high degree of sealing can be easily obtained.

According to a fourth aspect of the present invention, the above
A tube having a bag portion is integrally molded. Furthermore, according to the fifth feature of the present invention, the bag-shaped portion is
It is formed approximately on the outer side in the radial direction of the cross-section of the bush.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a wheel equipped with a tire with a tube according to a first embodiment of the present invention.

FIG. 2 is a sectional view similar to FIG. 1, showing a second embodiment of the present invention.

FIG. 3 is a sectional view similar to FIG. 1, showing a third embodiment of the present invention.

FIG. 4 is a sectional view similar to FIG. 1, showing a fourth embodiment of the present invention.

FIG. 5 is a sectional view similar to FIG. 1, showing a first reference example.

FIG. 6 is an explanatory diagram showing a tire mounting procedure in the first reference example.

FIG. 7 is a sectional view similar to FIG. 1, showing a second reference example.

[Explanation of symbols]

T-tube tire 1 tire 2 tubes 3 air chambers 4 tube body 7 bags 8 Sealant 11 ring-shaped bag

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B60C 5/08 B29C 35/02 B29C 73/16

Claims (5)

(57) [Claims] 1. A tire (1), Ri Do from the tube to form a tire (1) is housed in and annular air chamber (3) (2), at least the outer peripheral wall of the tube (2) A chew which is composed of a sealed bag-like portion (7) and in which a liquid sealing agent (8) is enclosed.
A method of manufacturing a tube used for a tire having a blister, comprising forming a tube (2) having the bag-shaped part (7),
Of the tube (2) of the bag-shaped part (7) facing each other.
And vulcanization molding, and after the vulcanization molding, the adhesion state
A tube used for a tire having a tube, characterized in that a liquid sealant (8) is injected into the bag-shaped portion (7) of the.
Manufacturing method of bu . 2. A tire (1), Ri Do from the tire (1) is housed in and annular air chamber (3) tubes (2) forming a, and left and right side walls of the tube (2) The outer peripheral wall is composed of a sealed bag-shaped portion (7), and a liquid sealing agent (8) is enclosed in the bag-shaped portion (7).
It is a method of manufacturing tubes used for tubed tires.
Te, to form a tube (2) having a bag portion (7), its
Of the tube (2) of the bag-shaped part (7) facing each other.
And vulcanization molding, and after the vulcanization molding, the adhesion state
A tube used for a tire having a tube, characterized in that a liquid sealant (8) is injected into the bag-shaped portion (7) of the.
Manufacturing method of bu . 3. A tie with a tube according to claim 1 or 2.
A method for manufacturing a tube used for a yarn, comprising: a tube body (4) forming a ring-shaped air chamber (3) and the tube body (4) surrounding the tube body (2) and being bonded to an outer surface thereof. And a ring-shaped bag body (11), which is individually and hermetically formed to form the bag-shaped portion, and a tube used for a tire with a tube.
Manufacturing method . 4. A tie with a tube according to claim 1 or 2.
A method of manufacturing a tube used for a shell, comprising integrally molding a tube (2) having the bag-shaped part (7).
Characterized in that that, Ju used in tubed tires
Method of manufacturing a tube. 5. The tube according to any one of claims 1 to 4.
A method for manufacturing a tube used for a filled tire, wherein the bag-shaped parts (7, 11) are of a cross section of the tube (2).
A method for manufacturing a tube used for a tire with a tube , characterized in that the tube is formed at a substantially half outer circumference .