JP7064758B2 - Gas leak inspection method for tires with wheels and manufacturing method for tires with wheels - Google Patents

Description

The present invention relates to a gas leak inspection method for a tire with a wheel and a method for manufacturing a tire with a wheel.

Conventionally, when manufacturing a tire with a wheel, after attaching the wheel to the tire, the space between the tire and the wheel is often filled with air (about 80% nitrogen, about 20% oxygen). In addition, in order to suppress the pressure drop in the space between the tire and the wheel, and to suppress the oxidation of the wheel and maintain the strength of the wheel, the space between the tire and the wheel should be filled with nitrogen gas. There is also. Suppressing the pressure drop inside the tire with wheels and maintaining the strength of the wheel contribute to improving the steering stability of the vehicle equipped with the tire with wheels.

It is necessary to inspect the manufactured tires with wheels for gas leaks from the above spaces. Patent Document 1 discloses a method of immersing a part of a tire in a liquid filled in a container in order to inspect an air leak (gas leak) of a tire with a wheel attached to a motorcycle. Another method for inspecting gas leaks in tires with wheels is to observe the pressure drop in the space between the tire and the wheel.

Japanese Unexamined Patent Publication No. 2016-049818

However, the above-mentioned conventional gas leak inspection method has a problem that it takes a long time to inspect a gas leak. For example, in the method of Patent Document 1, since it is necessary to wet or dry the tire, the inspection time for gas leakage becomes long. Further, in the method of observing the pressure drop in the tire with wheels, it is necessary to take a long time to observe in order to correctly inspect the gas leak.

The present invention has been made in view of the above circumstances, and is a method for inspecting gas leaks in tires with wheels and a method for inspecting gas leaks in tires with wheels, which can inspect gas leaks in tires with wheels in a short time and improve steering stability of the vehicle. An object of the present invention is to provide a method for manufacturing a tire with a tire.

One aspect of the present invention comprises a tire and a wheel attached to the tire, the space between the tire and the wheel is filled with a filling gas, and the filling gas is nitrogen in the air. For a tire with a wheel containing nitrogen gas having a concentration equal to or higher than the gas concentration and hydrogen gas having a concentration of 0.5% or higher, and the concentration of oxygen gas in the filling gas is less than the concentration of oxygen gas in air. This is a gas leak inspection method for a tire with a wheel that inspects the leakage of hydrogen gas .

Further, in one aspect of the present invention, the hydrogen gas is filled with a mixed gas containing nitrogen gas and hydrogen gas in the assembly step for assembling the wheel to the tire and the space between the tire and the wheel. It is a method for manufacturing a tire with a wheel, comprising a filling step for adjusting the concentration of the tire to 0.5% or more, and an inspection step for inspecting the leakage of hydrogen gas after the filling step .

Further, one aspect of the present invention includes an assembly step of assembling a wheel to a tire, a filling step of filling a space between the tire and the wheel with air or nitrogen gas, and before or after the filling step. The space between the tire and the wheel is provided with an injection step of injecting hydrogen gas, and after the filling step and the injection step, an inspection step of inspecting for leakage of the hydrogen gas. It is a method for manufacturing a tire with a wheel in which the concentration of the hydrogen gas in the space is 0.5% or more in the state after the injection step .

According to the present invention, gas leakage of a tire with wheels can be inspected in a short time, and steering stability of a vehicle equipped with tires with wheels can be improved.

It is sectional drawing which shows the tire with a wheel which concerns on 1st Embodiment of this invention. It is a figure which shows an example of the tire inspection apparatus which performs the gas leak inspection of the hole with a tire of FIG. It is a flowchart which shows the manufacturing method of the tire with a wheel which concerns on 1st Embodiment of this invention. It is a flowchart which shows the manufacturing method of the tire with a wheel which concerns on 2nd Embodiment of this invention.

[First Embodiment]
Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1-3.
As shown in FIG. 1, the tire 1 with wheels according to this embodiment is used for a vehicle or the like. The tire 1 with wheels includes a tire 2 and a wheel 3.

The tire 2 is formed in an annular shape by an elastic material such as rubber. Inside the tire 2, there is an annular cavity 11. An opening 12 is formed inside the tire 2 in the radial direction to connect the cavity 11 of the tire 2 to the outside space. The opening 12 of the tire 2 extends in the entire circumferential direction of the tire 2. The wheel 3 is assembled to the tire 2. Specifically, the wheel 3 is arranged inside the tire 2 in the radial direction and closes the opening 12 of the tire 2.
When the wheel 3 is assembled to the tire 2, the cavity 11 (the space between the tire 2 and the wheel 3) of the tire 2 is filled with the filling gas FG.

The filling gas FG filled in the cavity 11 of the tire 2 includes a nitrogen gas and a reaction gas.
The concentration of nitrogen gas in the filling gas FG is equal to or higher than the concentration of nitrogen gas (78%) in air (78% nitrogen, 21% oxygen). The concentration of nitrogen gas may be, for example, 85% or more.

The reaction gas is a gas that reacts with the gas sensor 101 (see FIG. 2). The reaction gas is hydrogen gas or helium gas. The concentration of the reaction gas in the filling gas FG may be 0.5% or more. The concentration of the reaction gas may be, for example, 3% or more. When the reaction gas is helium gas, the concentration of helium gas may be, for example, 10% or more.

The filling gas FG may contain, for example, only nitrogen gas and reaction gas. The filling gas FG may further contain other gases such as oxygen gas. However, the concentration of oxygen gas in the filling gas FG is less than the concentration of oxygen gas (21%) in the air. The concentration of oxygen gas may be, for example, less than 7%.

The pressure (atmospheric pressure) of the cavity 11 of the tire 2 filled with the filling gas FG is larger than the pressure of air outside the cavity 11 (for example, atmospheric pressure; 100 kPa). The pressure of the cavity 11 of the tire 2 is, for example, a pressure suitable for traveling of a vehicle to which the tire 1 with wheels is attached (for example, about 350 kPa).

Next, a method of manufacturing the tire 1 with wheels according to the present embodiment will be described.
As shown in FIG. 3, the method for manufacturing a tire with wheels 1 of the present embodiment includes an assembly step S11 and a filling step S12.
In the assembly step S11, the wheel 3 is assembled to the tire 2. Specifically, by arranging the wheel 3 inside the tire 2 in the radial direction, the wheel 3 closes the opening 12 inside the tire 2 in the radial direction. In the state after the assembly step S11, the cavity 11 of the tire 2 (the space between the tire 2 and the wheel 3) contains air having the same pressure (for example, atmospheric pressure) as the outside of the cavity 11.

In the filling step S12, the mixed gas is filled in the cavity 11 of the tire 2. The filling step S12 is performed after the assembly step S11. This completes the production of the tire 1 with wheels.
In the filling step S12, for example, after removing a part or all of the air contained in the cavity 11 of the tire 2, the cavity 11 of the tire 2 may be filled with the mixed gas. In the filling step S12 of the present embodiment, the mixed gas is filled in the cavity 11 of the tire 2 with air in the cavity 11 of the tire 2. That is, in the state after the filling step S12, the mixed gas and the air are mixed in the cavity 11 of the tire 2. The gas in which the mixed gas and the air are mixed corresponds to the filling gas FG in the tire 1 with wheels after manufacturing.

In the filling step S12, the mixed gas is filled in the cavity 11 of the tire 2 so that the pressure (atmospheric pressure) of the cavity 11 of the tire 2 is higher than the pressure (atmospheric pressure) outside the cavity 11. In the filling step S12, the mixed gas is filled into the cavity 11 of the tire 2 so that, for example, the pressure of the cavity 11 of the tire 2 becomes a pressure suitable for traveling of a vehicle to which the tire 1 with wheels is attached (for example, 350 kPa).

The mixed gas includes a nitrogen gas and a reaction gas.
The concentration of nitrogen gas in the mixed gas is equal to or higher than the concentration of nitrogen gas in air (78%).

The reaction gas is a gas that reacts with the gas sensor 101 (see FIG. 2), and is hydrogen gas or helium gas. The concentration of the reaction gas in the mixed gas is set so that the concentration of the reaction gas contained in the filling gas FG is 0.5% or more after the mixed gas is filled in the cavity 11 of the tire 2. In the filling step S12 of the present embodiment, as described above, the mixed gas is filled in the cavity 11 of the tire 2 with air in the cavity 11 of the tire 2. Therefore, the concentration of the reaction gas in the mixed gas is higher than the concentration of the reaction gas in the filling gas FG.

The mixed gas may contain, for example, only nitrogen gas and reaction gas. When the reaction gas is hydrogen gas, for example, a gas having a hydrogen gas concentration of 5% and a nitrogen gas concentration of 95% may be used as the mixed gas. Since the mixed gas of 5% hydrogen and 95% nitrogen is commercially available, it is easily available. The higher the concentration of the reaction gas, the easier it is to detect the reaction gas by the gas sensor 101. However, since hydrogen gas is a flammable gas, if the reaction gas is hydrogen gas, the concentration shall be less than the upper limit specified in the standard.

The mixed gas may further include other gases such as oxygen gas. When the mixed gas also contains oxygen gas, the concentration of oxygen gas in the mixed gas is less than the concentration of oxygen gas in the air (21%).

The concentration of the reaction gas in the mixed gas can be obtained by the following formula (1) based on the concentration of the reaction gas in the target filling gas FG.
The concentration of nitrogen gas in the mixed gas can be obtained by the following formula (2) based on the concentration of nitrogen gas in the target filling gas FG.
The concentration of oxygen gas in the mixed gas can be obtained by the following formula (3) based on the concentration of oxygen gas in the target filling gas FG.

In the above formulas (1) to (3), P0 indicates the pressure of the cavity 11 of the tire 2 (the pressure of the air outside the cavity 11 of the tire 2) before the filling step S12 is performed. ΔP indicates the pressure (filling pressure) of the cavity 11 of the tire 2 which is increased by the execution of the filling step S12. ΔP corresponds to the filling amount of the mixed gas filled in the cavity 11 of the tire 2 in the filling step S12. P0 + ΔP indicates the pressure of the cavity 11 of the tire 2 in the tire 1 with wheels after manufacturing.

In the formula (1), A indicates the concentration of the reaction gas in the filling gas FG of the tire 1 with wheels after manufacturing. Further, a indicates the concentration of the reaction gas in the mixed gas.
In the formula (2), B indicates the concentration of nitrogen gas in the filling gas FG. Further, b indicates the concentration of nitrogen gas in the mixed gas.
In the formula (3), C indicates the concentration of oxygen gas in the filling gas FG. Further, c indicates the concentration of nitrogen gas in the mixed gas.

The concentration of the reaction gas in the mixed gas may be, for example, 0.7% or more. In this case, the concentration of the reaction gas in the filling gas FG can be 0.5% or more. For example, in the above formula (1), when P0 = 100 kPa, ΔP = 250 kPa, and a = 0.7%, the concentration A of the reaction gas contained in the filling gas FG is set to 0.5%. Can be done.
The concentration of the reaction gas in the mixed gas shall be 22% or less. In this case, the concentration of nitrogen gas in the mixed gas can be 78% or more. Thereby, the concentration of the nitrogen gas contained in the filling gas FG can be set to be equal to or higher than the concentration of the nitrogen gas in the air (78%).

When the mixed gas contains oxygen gas, the concentration of oxygen gas in the mixed gas shall be less than 21%. In this case, the concentration of oxygen gas in the filling gas FG can be less than the concentration of oxygen gas in the air (21%).

The gas leak inspection of the wheeled tire 1 of the present embodiment manufactured as described above can be performed using, for example, the tire inspection device 100 shown in FIG.
The tire inspection device 100 includes a gas sensor 101. The gas sensor 101 detects the reaction gas contained in the filling gas FG filled in the cavity 11 of the tire 2 on the outside of the tire 1 with wheels. That is, the gas sensor 101 detects the reaction gas contained in the filling gas FG leaking outward from the cavity 11 of the tire 2. Specifically, the gas sensor 101 detects the concentration of the reaction gas.
The gas sensor 101 may be provided, for example, so as to move along the outer surface of the tire 1 with wheels. Further, a plurality of gas sensors 101 may be arranged, for example, along the outer surface of the tire 1 with wheels. In this case, it is possible to efficiently inspect the entire outer surface of the tire 2 and the wheel 3 for gas leakage of the tire 1 with wheels. In the present embodiment, two gas sensors 101 having a minimum detection sensitivity of 0.5 ppm are arranged one on the upper surface and one on the lower surface of the tire 2 to perform a gas leak inspection.

The tire inspection device 100 includes a gas measuring unit 102. The gas measuring unit 102 is connected to the gas sensor 101. The gas measuring unit 102 determines whether or not a gas leak has occurred in the wheeled tire 1 based on the concentration of the reaction gas detected by the gas sensor 101. When the concentration of the reaction gas detected by the gas sensor 101 is equal to or less than a predetermined threshold value, the gas measuring unit 102 states that "there is no gas leak in the tire 1 with wheels (the tire 1 with wheels has no defects such as holes). ) ”. Further, when the concentration of the reaction gas detected by the gas sensor 101 is equal to or higher than a predetermined threshold value, the gas measuring unit 102 states that "a gas leak has occurred in the tire 1 with wheels (defects such as holes in the tire 1 with wheels). There is) ”. In the present embodiment, the determination is performed with a predetermined threshold value of 4 ppm. The threshold value is preferably set to about 10 times the concentration of the reaction gas existing in the air, and may be set to an appropriate value according to the type of the reaction gas. The gas measuring unit 102 may have, for example, a display screen that displays the concentration of the reaction gas detected by the gas sensor 101, the determination result of gas leakage, and the like.

As described above, in the wheeled tire 1 according to the present embodiment, the reaction gas (hydrogen gas or helium gas) in the filling gas FG filled in the cavity 11 (space between the tire 2 and the wheel 3) of the tire 2 ) Is 0.5% or more, which is higher than the concentration of hydrogen gas (0.5 ppm) and the concentration of helium gas (5 ppm) existing in the air. Therefore, the gas leak of the wheel-equipped tire 1 can be inspected in a short time only by arranging the gas sensor 101 that reacts with the reaction gas on the outside of the wheel-equipped tire 1. For example, when the concentration of the reaction gas in the filling gas FG is 0.5%, the tire inspection device 100 is used to inspect the gas leak of the tire 1 with wheels, so that the tire 1 with wheels 1 has 10 kPa per day. It is possible to detect a gas leak in which a pressure drop occurs in about 4 minutes.

Further, in the wheeled tire 1 according to the present embodiment, when the concentration of the reaction gas (hydrogen gas or helium gas) in the filling gas FG is 3% or more, the concentration of hydrogen gas or helium gas present in the air. The difference with is large. Therefore, the gas leak inspection of the tire 1 with wheels using the gas sensor 101 can be inspected in a shorter time. For example, when the concentration of the reaction gas is 3%, by inspecting the gas leak of the tire 1 with wheels using the tire inspection device 100, a pressure drop of about 10 kPa per day occurs in the tire 1 with wheels. It is possible to detect a gas leak in about 40 seconds.

Further, in the tire 1 with wheels according to the present embodiment, when the concentration of the reaction gas in the filling gas FG is 10% or more, the difference from the concentration of hydrogen gas or helium gas existing in the air becomes larger. .. Therefore, the gas leak inspection of the tire 1 with wheels using the gas sensor 101 can be inspected in a shorter time. For example, when the concentration of the reaction gas is 10%, by inspecting the gas leak of the tire 1 with wheels using the tire inspection device 100, a pressure drop of about 10 kPa per day occurs in the tire 1 with wheels. It is possible to detect a gas leak in about 6 to 8 seconds. Since hydrogen gas is a flammable gas, it is not recommended to use hydrogen gas with a concentration of 10% or more for safety reasons. Therefore, the case where the concentration of the reaction gas in the filling gas FG is 10% or more is a suitable example when helium gas is used as the reaction gas.

Further, in the tire 1 with wheels according to the present embodiment, the concentration of nitrogen gas in the filling gas FG filled in the space between the tire 2 and the wheel 3 is equal to or higher than the concentration of nitrogen gas (78%) in the air. be. Therefore, as compared with the case where the tire 1 with wheels is filled with air, it is possible to suppress the pressure drop in the tire 1 with wheels due to the filling gas FG passing through the tire 2.
Further, in the tire 1 with wheels according to the present embodiment, the concentration of oxygen gas in the filling gas FG is less than the concentration of oxygen gas (21%) in the air. Therefore, as compared with the case where the tire 1 with wheels is filled with air, the oxidation of the wheels 3 by oxygen gas can be suppressed and the strength of the wheels 3 can be maintained.
As described above, the steering stability of the vehicle to which the tire 1 with wheels is attached can be improved.

Further, in the tire 1 with wheels according to the present embodiment, when the concentration of nitrogen gas in the filling gas FG is 85% or more, the pressure drop in the tire 1 with wheels can be further suppressed. Therefore, the steering stability of the vehicle to which the tire 1 with wheels is attached can be further improved. In the formula (2), when P0 = 100 kPa, ΔP = 250 kPa, and b = 90%, the concentration of nitrogen gas in the filling gas FG is 86.6%. Therefore, by using a mixed gas containing about 90% or 90% or more of nitrogen gas, a nitrogen gas concentration of 85% or more can be realized.

Further, in the tire 1 with wheels according to the present embodiment, when the concentration of oxygen gas in the filling gas FG is less than 7%, the oxidation of the wheel 3 by the oxygen gas is further suppressed to further increase the strength of the wheel 3. Can be maintained. Therefore, the steering stability of the vehicle to which the tire 1 with wheels is attached can be further improved. In the formula (3), when P0 = 100 kPa, ΔP = 250 kPa, and c = 0%, the concentration of oxygen gas in the filling gas FG is 6%. Therefore, by using a mixed gas that does not contain oxygen gas or a mixed gas that contains a very small amount of oxygen gas, an oxygen gas concentration of less than 7% can be realized.

According to the method for manufacturing a tire 1 with a wheel according to the present embodiment, the filling gas FG filled in the cavity 11 of the tire 2 is a nitrogen gas having a concentration (78%) or more in the air and a concentration of 0.5%. A tire 1 with a wheel containing the above reaction gas (hydrogen gas or helium gas) can be manufactured.
Further, according to the method for manufacturing a tire 1 with wheels according to the present embodiment, the cavity 11 of the tire 2 is filled with a mixed gas containing nitrogen gas and a reaction gas in the filling step S12. Therefore, the tire 1 with wheels can be efficiently manufactured as compared with the case where the nitrogen gas and the reaction gas are put into the cavity 11 of the tire 2 in different steps from each other. Further, the ratio of the gas (nitrogen gas, reaction gas) in the cavity 11 of the tire 2 can be kept constant.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. In the present embodiment, only the method for manufacturing the tire with wheels is different, and the configuration of the tire with wheels and the like is the same as that in the first embodiment. In the present embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 4, the method for manufacturing a tire with wheels 1 according to the present embodiment includes an assembly step S21, a filling step S22, and an injection step S23. The assembly step S21 is the same as the assembly step S11 (see FIG. 3) of the first embodiment.

In the filling step S22, the cavity 11 of the tire 2 is filled with air (78% nitrogen, 21% oxygen) or nitrogen gas (concentration 100%). The filling step S22 is performed after the assembly step S21. In the filling step S22, for example, nitrogen gas may be filled in the cavity 11 of the tire 2 after removing a part or all of the air contained in the cavity 11 of the tire 2. In the filling step S22 of the present embodiment, the cavity 11 of the tire 2 is filled with air or nitrogen gas while the cavity 11 of the tire 2 is filled with air.
In the filling step S22, air or nitrogen gas is filled into the cavity 11 of the tire 2 so that the pressure (atmospheric pressure) of the cavity 11 of the tire 2 is higher than the pressure (atmospheric pressure) outside the cavity 11. In the filling step S22, air or nitrogen gas is filled into the cavity 11 of the tire 2 so that, for example, the pressure of the cavity 11 of the tire 2 becomes a pressure suitable for traveling of a vehicle equipped with the tire 1 with wheels (for example, 350 kPa). ..

In the injection step S23, the reaction gas (concentration 100%) is injected into the cavity 11 of the tire 2. The reaction gas is hydrogen gas or helium gas. The injection step S23 is performed after the filling step S22. This completes the production of the tire 1 with wheels.

In the injection step S23, the reaction gas may be injected into the cavity 11 of the tire 2 so that the concentration of the reaction gas contained in the filling gas FG of the tire 1 with wheels after production is 0.5% or more. Further, in the injection step S23, the pressure of the cavity 11 of the tire 2 is within the range of the pressure suitable for traveling of the vehicle to which the tire 1 with wheels is attached (for example, about 350 kPa ± 10 kPa). It is advisable to inject the reaction gas into the tire.
The injection amount of the reaction gas to be injected into the cavity 11 of the tire 2 in the injection step S23 can be obtained by the following formula (4).

In the above formula (4), P0 indicates the pressure of the cavity 11 of the tire 2 (the pressure of the air outside the cavity 11 of the tire 2) before the filling step S22 and the injection step S23 are performed. ΔP1 indicates the pressure (filling pressure) of the cavity 11 of the tire 2 which is increased by the execution of the filling step S22. ΔP1 corresponds to the filling amount of air or nitrogen gas filled in the cavity 11 of the tire 2 in the filling step S22. ΔP2 indicates the pressure (filling pressure) of the cavity 11 of the tire 2 which is increased by the execution of the injection step S23. ΔP2 corresponds to the injection amount of the reaction gas injected into the cavity 11 of the tire 2 in the injection step S23. P0 + ΔP1 + ΔP2 indicate the pressure of the cavity 11 of the tire 2 in the tire 1 with wheels after manufacturing. D indicates the concentration of the reaction gas in the filling gas FG of the tire 1 with wheels after manufacturing.

The injection amount (filling pressure) of the reaction gas to be injected into the cavity 11 of the tire 2 in the injection step S23 may be, for example, 1.7 kPa or more. In this case, the concentration of the reaction gas in the filling gas FG can be 0.5% or more. For example, in the above formula (4), when P0 = 100 kPa, ΔP1 = 250 kPa, and ΔP2 = 1.7 kPa, the concentration D of the reaction gas contained in the filling gas FG may be 0.5%. can.

In the manufacturing method of the present embodiment, by carrying out the filling step S22 and the injection step S23, the concentration of the nitrogen gas contained in the filling gas FG of the tire 1 with a wheel after manufacturing is changed to the concentration of the nitrogen gas in the air. It can be (78%) or more. Further, the concentration of the oxygen gas contained in the filling gas FG can be set to less than the concentration of the oxygen gas in the air (21%).

According to the method for manufacturing a tire with a wheel 1 according to the present embodiment, the same effect as that of the first embodiment is obtained.
Further, according to the method for manufacturing a tire with wheels 1 according to the present embodiment, the tire with wheels 1 in which the pressure in the cavity 11 of the tire 2 is suitable for running a vehicle, that is, during use or immediately before use. A gas leak inspection of the tire 1 with wheels can be performed only by injecting a reaction gas (hydrogen gas or helium gas) into the tire 1 with wheels. Further, the reaction gas can be injected only into the tire 1 with a wheel that requires a gas leak inspection.

In the manufacturing method of the second embodiment, the injection step S23 may be performed, for example, after the assembly step S21 and before the filling step S22. In this case, in the injection step S23, for example, the cavity 11 of the tire 2 may be filled with a reaction gas (hydrogen gas or helium gas) while the cavity 11 of the tire 2 is filled with air. Further, in the injection step S23, for example, the reaction gas may be injected into the cavity 11 of the tire 2 after removing a part or all of the air contained in the cavity 11 of the tire 2.

Although the present invention has been described in detail above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

1 ... Tire with wheel, 2 ... Tire, 3 ... Wheel, 11 ... Cavity (space between tire 2 and wheel 3), 12 ... Opening, 100 ... Tire inspection device, 101 ... Gas sensor, 102 ... Gas measuring unit, FG ... Filling gas, S11 ... Assembly step, S12 ... Filling step, S21 ... Assembly step, S22 ... Filling step, S23 ... Injection step

Claims (7)

A tire and a wheel attached to the tire are provided.
The space between the tire and the wheel is filled with a filling gas.
The filling gas contains nitrogen gas having a concentration equal to or higher than the concentration of nitrogen gas in the air and hydrogen gas having a concentration of 0.5% or higher.
A gas leak inspection method for a tire with a wheel for inspecting a leak of hydrogen gas for a tire with a wheel in which the concentration of oxygen gas in the filling gas is less than the concentration of oxygen gas in the air. The gas leak inspection method for a tire with a wheel according to claim 1, wherein the concentration of the hydrogen gas in the filling gas is 3% or more. The gas leak inspection method for a tire with a wheel according to claim 1 or 2, wherein the concentration of the nitrogen gas in the filling gas is 85% or more. The gas leak inspection method for a tire with a wheel according to any one of claims 1 to 3, wherein the concentration of the oxygen gas in the filling gas is less than 7%. Assembling step to assemble the wheel to the tire and
A filling step of filling the space between the tire and the wheel with a mixed gas containing nitrogen gas and hydrogen gas to adjust the concentration of the hydrogen gas to 0.5% or more .
A method for manufacturing a tire with a wheel , comprising an inspection step for inspecting a leak of hydrogen gas after the filling step . Assembling step to assemble the wheel to the tire and
A filling step of filling the space between the tire and the wheel with air or nitrogen gas,
An injection step of injecting hydrogen gas into the space between the tire and the wheel before or after the filling step .
After the filling step and the injecting step, an inspection step for inspecting the leakage of the hydrogen gas is provided .
A method for manufacturing a tire with a wheel in which the concentration of the hydrogen gas in the space is 0.5% or more in the state after the filling step and the injection step . The method for manufacturing a tire with wheels according to claim 5, wherein the concentration of the hydrogen gas in the mixed gas is 5% and the concentration of the nitrogen gas is 95%.

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