JP2002178723A - Tire and wheel assembly and its rim assembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire and wheel assembly, which facilitates compatibility of rim assembling rim sliding resistance and rim removing resistance, and its rim assembling method. SOLUTION: At least either the beat part 1b or 1b' of a pneumatic tire 1 and the rim section 3 of a wheel 2 are joined to each other through adhesives 5. The rim assembling method comprises natural hardenability or thermosetting adhesive 5 applied between at least either the beat part 1b or 1b' of the pneumatic tire 1 and the rim section 3 of the wheel 2, and rim assembling of the pneumatic tire 1 to the wheel 2 carried out before the hardening of the adhesive 5 and then the adhesive 5 is made to harden.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire / wheel assembly and a rim assembling method thereof, and more particularly, to a rim assembling operation in a rim assembling operation, rim slip resistance after rim assembling, and rim removal resistance. The present invention relates to a tire / wheel assembly and a rim assembling method thereof.

[0002]

2. Description of the Related Art To assemble a pneumatic tire into a rim, first drop both bead portions of the tire into a center well of a rim portion, inject air into the pneumatic tire in that state, and gradually increase the internal pressure. Then, the two bead portions dropped into the well portion are slid toward the bead sheets on both sides, respectively, so as to be fitted into the respective bead sheets.

In the above-mentioned rim assembling work, the size of the inner diameter of the bead portion greatly affects the rim assembling property (easiness of the rim assembling work), and also greatly affects the rim slip resistance and the rim detaching resistance after the rim assembling. It is known to That is, if the inner diameter of the bead portion is too small compared to the bead seat diameter, a large resistance to slippage of the bead portion occurs when assembling the rim, and the air pressure (fitting pressure) must be increased. Make it difficult. Such difficulty in rim assembly work does not always occur in both bead portions, and generally occurs in one of the bead portions,
Various factors appear to be intertwined between the bead portion and the bead sheet. Conversely, if the inner diameter of the bead portion is too large compared to the bead seat diameter, the rim assembling work will be easier, but the bead portion after the rim assembling will be loose on the bead seat. This will reduce the detachability.

Therefore, the rim assembling property during the rim assembling operation, the rim slip resistance and the rim detaching resistance after the rim assembling are incompatible with each other such that if one is improved, the other becomes worse. The realization of satisfying technology has been a traditional issue in the industry.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tire / wheel assembly and a rim thereof which are capable of achieving both rim assembling work during rim assembling, rim assembling resistance after rim assembling, and rim detaching resistance. It is to provide an assembling method.

[0006]

According to the present invention, there is provided a tire / wheel assembly in which a pneumatic tire is rim-assembled on a wheel, wherein at least one bead portion of the pneumatic tire and a rim portion of the wheel are provided. Are bonded with an adhesive.

Further, according to the rim assembling method of a tire / wheel assembly of the present invention, a natural or thermosetting adhesive is applied between at least one bead portion of a pneumatic tire and a rim portion of a wheel. The pneumatic tire is rim-assembled to the wheel before the adhesive is cured, and then the adhesive is cured.

[0008] As described above, the adhesive interposed between the bead portion of the pneumatic tire and the rim portion of the wheel has a lubricating action before curing, so that when the rim is assembled,
Even if the inside diameter of the bead part is small, the rim can be assembled with a low fitting pressure, and after the rim is assembled, the adhesive is hardened, so that the bead part and the bead sheet adhere firmly,
Rim slip resistance and rim detachment resistance can be improved.

[0009]

FIG. 1 is a half sectional view illustrating a tire / wheel assembly according to the present invention.

Referring to FIG. 1, a tire / wheel assembly A
Is formed by rim-assembling a pneumatic tire 1 to a wheel 2. The pneumatic tire to be assembled on the rim may be a radial tire or a bias tire.

The wheel 2 is integrally formed of a rim portion 3 and a disk portion 4. The rim portion 3 has a well portion 3w at the center in the width direction, and bead seats 3s, 3s' on both left and right sides.
Is formed. The bead seat 3s of this wheel 2,
3s ′, the pneumatic tire 1 is moved to the left and right bead portions 1
b, 1b ', and a natural or thermosetting adhesive 5 is interposed between the bead portions 1b, 1b' and the bead sheets 3s, 3s' as shown in FIG. The two are joined.

In the present invention, the operation of assembling the rim of the tire / wheel assembly A is performed as follows.

First, the bead portions 1b and 1b 'of the pneumatic tire 1 before the rim assembly and the bead seat 3 of the wheel 2
An uncured natural or thermosetting adhesive 5 is applied to s, 3s'. However, it is not always necessary to apply the adhesive 5 to all of the bead portions 1b, 1b 'of the pneumatic tire 1 and the bead sheets 3s, 3s' of the wheel 2, but only one of the bead portions. Is also good. As described above, the difficulty in assembling the rim does not always occur in both bead portions, but generally occurs in only one of the bead portions. In addition, if the adhesive is applied to any one of the bead portions 1b, 1b 'and the bead sheet 3s, 3s' relative to each other between the bead portions 1b, 1b 'and the bead sheets 3s, 3s', the rim slip resistance and the rim detachment resistance are effectively acted on. Because.

Next, after the application of the adhesive is completed,
While the adhesive is in an uncured state, the pneumatic tire 1
The two bead portions 1b, 1b 'of the wheel 2 to the well portion 3w
To the state.

When air is injected into the pneumatic tire 1 assembled to the rim portion 3 as described above, and the air pressure is gradually increased while continuing the air injection, the bead portions 1b and 1b 'dropped into the well portion 3w cause the beads 1b and 1b' to bead. Sheet 3s, 3
It moves while sliding toward s ', and finally comes into a state of being attached to each bead seat 3s, 3s'. When the bead portions 1b, 1b 'move in this manner, each bead portion 1b, 1b'
The uncured adhesive 5 applied to the end face 1b 'performs a lubricating action, and moves smoothly even when the inner diameter of the bead portions 1b, 1b' is small. Further, since the rim can be moved with a relatively low fitting pressure, the rim workability is improved and the bead portions 1b and 1b 'are not damaged.

After the movement of the bead portions 1b, 1b 'with respect to the bead sheets 3s, 3s' is completed, when the adhesive 5 is cured at room temperature or with heating in that state, the bead portions 1b, 1b''And bead seat 3s, 3s'
Are completely bonded. The tire / wheel assembly A completed in this way can exhibit excellent effects on rim slip resistance and rim detachment resistance by the adhesive effect of the adhesive 5.

The adhesive used in the present invention is a natural or thermosetting adhesive which is liquid during rim assembling work and has a property of curing after a lapse of a predetermined time after assembling the rim. The curing time of the adhesive is from 10 minutes to 24
One that cures in a short period of time (one day) is preferred.

The kind of the adhesive is not particularly limited as long as it satisfies the above-mentioned characteristics. For example, an adhesive in which the main component is an epoxy resin and the curing agent is polyamidoamine can be used. Specifically, a bisphenol A type epoxy resin or a bisphenol F type epoxy resin is used as an epoxy resin, and the epoxy resin 100
On the other hand, an adhesive containing an equivalent amount of polyamine SUNMIDE 340 (manufactured by Sanwa Chemical Co., Ltd.) may be used. The adhesive cures in about one hour at room temperature. Further, an equivalent amount of polyamine SU is used with respect to the same epoxy resin 100 as above.
An adhesive to which NMIDE 315 (manufactured by Sanwa Chemical Co., Ltd.) is added can be used. This adhesive cures in about 24 hours at room temperature.

The adhesive used in the present invention preferably has the property of expanding in volume upon curing. The use of such a volume-expandable adhesive improves the tightening force between the bead portion of the pneumatic tire and the rim by inflation after the rim is assembled. Sex can be obtained. In order to make such volume expansion characteristics possible, for example, a compound having a spiro ortho ether group may be blended into the adhesive. The compound having a spiro ortho ether group undergoes a curing reaction with an acid catalyst by moisture, and can undergo volume expansion accompanying the curing.
Particularly, a compound having two or more spiroorthoether groups in one molecule is preferable.

The adhesive used in the present invention may contain hard particles. By blending such hard particles, the bead portion of the pneumatic tire can increase the slip resistance with respect to the rim, and can improve the slip resistance.

Hard particles have an elastic modulus of 10 to 500.
Those in the range of MPa are preferred. Further, if the particle size is too small, the particles have the adverse effect of increasing the slip, so that the average particle size is preferably in the range of 0.2 to 2.0 mm. Such particles are not particularly limited as long as they have the above-mentioned properties, and for example, sand such as gold sand, metal particles, ceramic particles, glass particles, and the like can be used.

[0022]

As described above, according to the present invention, the adhesive interposed between the bead portion of the pneumatic tire and the rim portion of the wheel has a lubricating action before curing, so that the The rim can be assembled with a low fitting pressure even if the inner diameter of the bead is small, and the adhesive hardens after the rim is assembled, so that the bead and the bead sheet are firmly adhered to each other. The rim detachability can be improved.

[Brief description of the drawings]

FIG. 1 is a half sectional view illustrating a tire / wheel assembly of the present invention.

FIG. 2 is an enlarged view showing a main part of the tire / wheel assembly of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pneumatic tire 1b, 1b 'Bead part 2 Wheel 3 Rim part 3s, 3s' Bead seat 3w Well part A Tire-wheel assembly

Claims (7)

[Claims] 1. A tire / wheel assembly in which a pneumatic tire is rim-assembled to a wheel, wherein at least one bead portion of the pneumatic tire and a rim portion of the wheel are bonded with an adhesive. Three-dimensional. 2. The tire / wheel assembly according to claim 1, wherein the adhesive is an epoxy resin adhesive. 3. The tire / wheel assembly according to claim 1, wherein the adhesive contains hard particles. 4. An average particle diameter of the particles is 0.2 to 2.0.
The tire / wheel assembly according to claim 3, which is in mm. 5. An elastic modulus of the particles is 10 to 500 MPa.
The tire / wheel assembly according to claim 3 or 4, wherein 6. A natural or thermosetting adhesive is applied between at least one bead portion of a pneumatic tire and a rim portion of a wheel, and the pneumatic tire is cured before the adhesive is cured. A method for assembling a rim of a tire and wheel assembly, wherein the rim is assembled to the wheel and then the adhesive is cured. 7. The method according to claim 6, wherein the adhesive has a property of expanding in volume upon curing.