JP4507401B2 - Tire and wheel assembly and rim assembling method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tire / wheel assembly and a method of assembling the rim thereof, and more particularly, a tire / wheel assembly that can achieve both rim assembling performance in rim assembling work, rim slip resistance after rim assembling, and rim detachment resistance. The present invention relates to a solid and its rim assembly method.
[0002]
[Prior art]
The work of assembling the pneumatic tire to the wheel is done by first dropping the two bead parts of the tire into the well part at the center of the rim part, injecting air into the pneumatic tire in that state, gradually increasing the internal pressure, Slide both bead parts dropped onto the bead sheets on both sides to fit into each bead sheet.
[0003]
In the above rim assembling work, the size of the inner diameter of the bead part greatly affects the rim assembling property (easy rim assembling work), and after rim assembling, the rim sliding resistance and rim detaching resistance can be greatly affected. Are known. That is, if the inner diameter of the bead portion is too small compared to the bead seat diameter, a large resistance is generated for slippage of the bead portion when assembling the rim, and the air pressure (fitting pressure) must be increased. Make it difficult. Such difficulty in assembling the rim does not always occur in both bead portions, but generally occurs in either one of the bead portions, and various factors between the bead portion and the bead seat seem to be intertwined. . Conversely, if the inner diameter of the bead portion is too large compared to the bead seat diameter, the rim assembly work becomes easy, but the bead portion after the rim assembly becomes loose on the bead seat, so rim slip resistance and rim resistance Detachability will be reduced.
[0004]
Therefore, the rim assembly performance during rim assembly work, the rim slip resistance after rim assembly, and the rim detachment resistance are incompatible with each other. The realization of has been a traditional challenge in the industry.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide a tire / wheel assembly and a method for assembling the rim in which rim assembling work in rim assembling work, rim slip resistance after rim assembling and rim detachment resistance are compatible.
[0006]
[Means for Solving the Problems]
The present invention that achieves the above object is a tire / wheel assembly in which a pneumatic tire is assembled on a wheel, and volume expansion occurs between at least one bead portion of the pneumatic tire and a rim portion of the wheel during curing. It is characterized by being bonded with a natural curable or thermosetting adhesive having characteristics.
[0007]
The tire / wheel assembly rim assembling method of the present invention is a natural curable or thermosetting material having a property of volume expansion during curing between at least one bead portion of a pneumatic tire and a rim portion of the wheel. An adhesive is applied, the pneumatic tire is assembled on the wheel before the adhesive is cured, and then the adhesive is cured.
[0008]
As described above, the adhesive interposed between the bead part of the pneumatic tire and the rim part of the wheel has a lubricating action before curing, so that when fitting the rim, the fitting pressure is low even if the inner diameter of the bead part is small. The rim can be assembled and the adhesive is cured after the rim is assembled, so that the bead portion and the bead sheet are firmly bonded to each other, so that the rim slip resistance and the rim removal resistance can be improved.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a half sectional view illustrating a tire / wheel assembly according to the present invention.
[0010]
In FIG. 1, a tire / wheel assembly A is configured by assembling a pneumatic tire 1 on a wheel 2 with a rim. The pneumatic tire assembled on the rim here may be a radial tire or a bias tire.
[0011]
The wheel 2 is integrally formed of a rim portion 3 and a disk portion 4, and the rim portion 3 has a well portion 3w at the center in the width direction, and bead sheets 3s and 3s' are formed on both the left and right sides. The pneumatic tire 1 has left and right bead portions 1b and 1b 'mounted on the bead seats 3s and 3s' of the wheel 2, and between the bead portions 1b and 1b 'and the bead seats 3s and 3s', As shown in FIG. 2, a self-curing or thermosetting adhesive 5 is interposed between the two.
[0012]
In the present invention, the operation of assembling the tire / wheel assembly A as described above is performed as follows.
[0013]
First, the uncured natural or thermosetting adhesive 5 is applied to the bead portions 1b and 1b ′ of the pneumatic tire 1 and the bead sheets 3s and 3s ′ of the wheel 2 before assembling the rim. However, it is not always necessary to apply the adhesive 5 to 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. Also good. As described above, this is because the difficulty in assembling the rim does not always occur in both bead portions, and is generally one of them. Further, the adhesiveness effectively acts on the rim slip resistance and rim detachment resistance if an adhesive is applied to either one of the bead portions 1b, 1b ′ and the bead sheets 3s, 3s ′. Because.
[0014]
Next, after the application of the adhesive is completed, both bead portions 1b and 1b ′ of the pneumatic tire 1 are dropped into the well portion 3w of the wheel 2 while the adhesive is in an uncured state.
[0015]
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 bead portions 1b and 1b ′ dropped into the well portion 3w become the bead seats 3s, It moves while sliding toward 3s ', and finally it is in a state of being attached to each bead sheet 3s, 3s'. Thus, when both bead parts 1b and 1b 'move, the unhardened adhesive agent 5 apply | coated to the end surface of each bead part 1b and 1b' performs a lubrication effect, and the internal diameter of bead parts 1b and 1b 'is small. Even when moving smoothly. Further, since it can be moved even with a relatively low fitting pressure, the rim workability is improved and the bead portions 1b and 1b 'are not damaged.
[0016]
After the movement of the bead portions 1b and 1b ′ with respect to the bead sheets 3s and 3s ′ is completed as described above, the adhesive 5 is cured at room temperature or under heating in this state, and the bead portions 1b and 1b ′ and the bead are moved. The sheets 3s and 3s ′ are completely bonded. The tire / wheel assembly A thus completed can exert an effect excellent in rim slip resistance and rim removal resistance due to the adhesive effect of the adhesive 5.
[0017]
The adhesive used in the present invention is a liquid that is liquefied during the rim assembly operation, and a natural curable or thermosetting adhesive having such a property that it cures after a certain time has elapsed after the rim assembly. The adhesive is preferably cured in a short time of 10 minutes to 24 hours (one day).
[0018]
The type of the adhesive is not particularly limited as long as it satisfies the above characteristics, and examples thereof include an adhesive in which the main agent is an epoxy resin and a curing agent is polyamidoamine. Specifically, an adhesive in which bisphenol A type epoxy resin or bisphenol F type epoxy resin is used as an epoxy resin, and an equivalent polyamine SUNMIDE 340 (manufactured by Sanwa Chemical Co., Ltd.) is blended with the epoxy resin 100. Should be used. This adhesive cures at room temperature in about 1 hour. Moreover, the adhesive agent which added the equivalent polyamine SUNMIDE315 (made by Sanwa Chemical Co., Ltd.) with respect to the epoxy resin 100 same as the above can be used. This adhesive cures in about 24 hours at room temperature.
[0019]
As the adhesive used in the present invention, an adhesive having a property of volume expansion upon curing is used . When a volume-expandable adhesive is used in this way, the tightening force between the bead portion of the pneumatic tire and the rim is improved by expansion after assembling the rim. Sex can be obtained. In order to enable such volume expansion characteristics, for example, a compound having a spiro ortho ether group may be added to the adhesive. A compound having a spiro ortho ether group undergoes a curing reaction with an acid catalyst and moisture, and can undergo volume expansion with the curing. In particular, a compound having two or more spiro ortho ether groups in one molecule is preferable.
[0020]
Moreover, it is good to mix | blend hard particle | grains with the adhesive agent used for this invention. By blending such hard particles, the bead portion of the pneumatic tire can increase the slip resistance against the rim, and the slip resistance can be improved.
[0021]
The hard particles preferably have an elastic modulus in the range of 10 to 500 MPa. Further, since the particles have an adverse effect of increasing slipping if the particle size is too small, 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 characteristics. For example, sand such as gold sand, metal particles, ceramic particles, glass particles, and the like can be used.
[0022]
【The invention's effect】
As described above, according to the present invention, since the adhesive interposed between the bead portion of the pneumatic tire and the rim portion of the wheel has a lubricating action before curing, the inner diameter of the bead portion is reduced when the rim is assembled. The rim can be assembled with a low fitting pressure even if it is small, and the adhesive is cured after the rim is assembled, so that the bead portion and the bead sheet are firmly bonded, thereby improving rim slip resistance and rim detachment resistance. can do.
[Brief description of the drawings]
FIG. 1 is a half sectional view illustrating a tire / wheel assembly according to the present invention.
FIG. 2 is an enlarged view showing a main part of the tire / wheel assembly of FIG. 1;
[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 and wheel assembly

Claims (6)

In a tire / wheel assembly in which a pneumatic tire is rim-assembled to a wheel, natural curable or thermosetting having a characteristic of volume expansion during curing between at least one bead portion of the pneumatic tire and the rim portion of the wheel. Tire / wheel assembly bonded with other adhesives.  The tire / wheel assembly according to claim 1, wherein the adhesive is an epoxy resin adhesive.  The tire / wheel assembly according to claim 1 or 2, wherein hard particles are blended in the adhesive.  The tire / wheel assembly according to claim 3, wherein an average particle diameter of the particles is 0.2 to 2.0 mm.  The tire / wheel assembly according to claim 3 or 4, wherein the particle has an elastic modulus of 10 to 500 MPa. A natural or thermosetting adhesive having a volume expansion property is applied between at least one bead portion of the pneumatic tire and a rim portion of the wheel, and the air is cured before the adhesive is cured. A method of assembling a rim of a tire / wheel assembly, wherein a rim is assembled on the wheel and then the adhesive is cured.

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