JP4076380B2 - Indoor tire durability test method and testing machine - Google Patents

Indoor tire durability test method and testing machine Download PDF

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Publication number
JP4076380B2
JP4076380B2 JP2002195556A JP2002195556A JP4076380B2 JP 4076380 B2 JP4076380 B2 JP 4076380B2 JP 2002195556 A JP2002195556 A JP 2002195556A JP 2002195556 A JP2002195556 A JP 2002195556A JP 4076380 B2 JP4076380 B2 JP 4076380B2
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Prior art keywords
tire
temperature
indoor
drum
durability
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JP2004037288A (en
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敏男 落合
茂 篠田
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Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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Description

【０００１】
【発明の属する技術分野】
本発明は、室内タイヤ耐久試験方法及び試験機に関し、さらに詳しくは、極低温条件でのタイヤ耐久性の評価を室内タイヤ耐久試験機で実施することを可能にした室内タイヤ耐久試験方法及び試験機に関する。
【０００２】
【従来の技術】
従来、室内タイヤ耐久試験機を用いてタイヤの耐久試験を実施する場合、一般に室温が高いほどタイヤにとって過酷な条件であることから、標準的に約３８℃の雰囲気温度で試験を実施している。ところが、タイヤの特性によっては、市場における極低温条件の方が厳しい使用条件となる場合もあり、このような極低温条件でのタイヤ耐久性を評価することも重要である。特に、熱可塑性樹脂等の新素材を採用したタイヤにおいては、０℃以下での耐久性の評価を行うことが強く要望されている。
【０００３】
しかしながら、従来の室内タイヤ耐久試験機は、前述のように高温条件での耐久試験を想定したものであるため、極低温条件での耐久試験を実施することができなかった。また、冬期であれば極低温条件での耐久試験を屋外で実施することが可能であるが、この場合、試験期間や試験場所が限定されるため、タイヤ耐久性の評価を効率良く行うことができなかった。
【０００４】
【発明が解決しようとする課題】
本発明の目的は、極低温条件でのタイヤ耐久性の評価を室内タイヤ耐久試験機で実施することを可能にした室内タイヤ耐久試験方法及び試験機を提供するものである。
【０００５】
【課題を解決するための手段】
上記目的を達成するための本発明の室内タイヤ耐久試験方法は、室温を空調装置により制御する恒温室を備えた室内タイヤ耐久試験機を使用し、前記恒温室内の雰囲気温度を０°以下の所定の温度に制御した状態でタイヤの走行と停止とを繰り返しながら停止中にタイヤが負荷される条件下でタイヤ耐久試験を実施することを特徴とするものである。
【０００６】
このように室温を空調装置により制御する恒温室を備えた室内タイヤ耐久試験機を使用し、恒温室内の雰囲気温度を０°以下の所定の温度に制御した状態でタイヤ耐久試験を実施するので、極低温条件でのタイヤ耐久性の評価を室内タイヤ耐久試験機を用いて季節に拘らず効率良く行うことができる。
【０００７】
本発明の室内タイヤ耐久試験方法では、タイヤの走行と停止とを繰り返しながら停車中にタイヤが負荷される条件下でタイヤ耐久試験を実施するが、この際、停止中にタイヤが負荷される位置を一定にするような条件設定を行うと良い。
【０００８】
一方、上記目的を達成するための本発明の室内タイヤ耐久試験機は、室温を空調装置により制御する恒温室を備え、少なくとも試験されるタイヤと該タイヤを転動させるドラムを前記恒温室内に配置する一方で、前記ドラムを駆動するモータを前記恒温室の外部に配置し、前記タイヤを前記ドラムの外周面に押し付ける際に該タイヤに負荷を与える試験荷重負荷部を前記恒温室内に配置した構成を有し、前記恒温室内の雰囲気温度を０°以下の所定の温度に制御した状態でタイヤの走行と停止とを繰り返しながら停車中にタイヤが負荷される条件下でタイヤ耐久試験を実施するようにしたことを特徴とするものである。
【０００９】
このように室温を空調装置により制御する恒温室を備えた室内タイヤ耐久試験機を構成するに際して、試験タイヤとドラムを恒温室内に配置する一方で、モータを恒温室の外部に配置することにより、モータの凍結を回避しつつ極低温条件でのタイヤ耐久性の評価を連続的に行うことができる。特に、ドラム及びタイヤを搭載する支持台の基礎にヒータ等の凍上予防装置を介在させるようにすれば、基礎の凍上を防止して長期間の連続試験を実施することが可能になる。
【００１０】
【発明の実施の形態】
以下、本発明の構成につき添付の図面を参照しながら詳細に説明する。
【００１１】
図１は本発明の室内タイヤ耐久試験方法を実施するための室内タイヤ耐久試験機を示すものである。図１に示すように、本実施形態の室内タイヤ耐久試験機は、室温を空調装置１によって制御する恒温室２を備えている。この恒温室２の外部には支持台３Ａが配設され、恒温室２の内部には支持台３Ｂが配設されている。恒温室２の外部の支持台３Ａ上には、モータ４が搭載されている。一方、恒温室２の内部の支持台３Ｂ上には、ベルト５を介してモータ４によって駆動されるドラム６と、タイヤＴを回転自在に支持するタイヤ支持部を備えた台車７とが搭載されている。台車７は、ドラム６の回転軸に対して直交する方向に移動自在であると共に、重量体８を有する試験荷重負荷部９からの荷重を受けてタイヤＴをドラム６の外周面に押し付けるようになっている。支持台３Ａ，３Ｂはそれぞれ基礎１０Ａ，１０Ｂを介して設置されているが、支持台３Ｂの基礎１０Ｂには凍上防止装置としてヒータ１１が設けられている。
【００１２】
通常、０℃以下の雰囲気温度では、試験機の基礎が凍上するため、タイヤ耐久試験のように長期間を要する試験を行うことが困難である。そこで、上記室内タイヤ耐久試験機では、基礎の凍上を防ぐ手段として、ドラム６及びタイヤＴを搭載する支持台３Ｂの基礎１０Ｂにヒータ１１からなる凍上予防装置を設けている。そのため、０℃以下の雰囲気温度であっても、基礎の凍上を防ぎつつ、タイヤ耐久試験を長期間にわたって連続的に実施することが可能である。このような凍上防止装置は好ましく装備されるが、図２のように凍上防止装置を装備しないものであっても良い。
【００１３】
上記室内タイヤ耐久試験機を用いてタイヤ耐久試験を実施する場合、重量体８の重量に基づいてタイヤＴへの荷重を設定し、モータ４の回転速度に基づいてタイヤＴの走行速度を設定し、空調装置１により恒温室２内の雰囲気温度を設定するのである。空調装置１は、少なくとも恒温室２内の雰囲気温度を０℃以下に冷却する機能を備えているが、広範な温度範囲でのタイヤ耐久試験を可能にするために恒温室２内の雰囲気温度を例えば−４０〜４０℃の範囲で調整する機能を備えていることが望ましい。
【００１４】
次に、本発明の室内タイヤ耐久試験方法について説明する。本発明では、上記室内タイヤ耐久試験機を使用し、恒温室２内の雰囲気温度を０°以下の所定の温度に制御した状態でタイヤ耐久試験を実施する。トレッドゴムの脆化温度付近の環境温度でのタイヤ走行試験では、タイヤ温度が環境温度に近い状態となる走行開始時がタイヤにとって最も厳しい条件である。また、熱可塑性樹脂を含むタイヤにとって０℃以下の使用条件は極めて厳しい条件である。本発明は、これら極低温条件でのタイヤ耐久性の評価を室内タイヤ耐久試験機を用いて実施することを可能にするのである。本発明によれば、例えば、トレッドゴムの脆化によるグルーブクラックの発生状況を調べたり、各タイヤ構成部材の低温耐久性を評価することができる。
【００１５】
本発明の室内タイヤ耐久試験方法では、例えば、所定の時間でタイヤの走行と停止とを繰り返しながらタイヤ耐久試験を実施することができる。このような試験によれば、実際の環境により近い走行環境を再現することができる。タイヤの走行と停止とを繰り返すにあたって、その走行時間及び停止時間はタイヤの要求性能に応じて任意に設定することができる。また、停止中にタイヤが負荷される位置を一定にすれば、フラットスポット生成部が同一部位となり、変形したことに対する耐久性（耐クラック性等）を、非常に厳しい条件で評価できることになる。
【００１６】
【実施例】
タイヤサイズ２０５／６０Ｒ１５の空気入りタイヤについて、表１に示すように本発明の室内タイヤ耐久試験方法を実施した。表１において、試験タイヤＡはガラス転移点Ｔｇが−３３℃であるＳＢＲ系キャップコンパウンドを用いたタイヤであり、試験タイヤＢはガラス転移点Ｔｇが−６０℃であるＮＲ系キャップコンパウンドを用いたタイヤである。一定速走行では４０ｋｍ／ｈにて１０日間連続走行し、間欠走行では４０ｋｍ／ｈにて２０分間走行した後に４０分間停止する走行サイクルを３０日間繰り返した。但し、グルーブクラック等の故障が発生した場合は、その時点で試験を終了した。タイヤ耐久試験の結果を表１に併せて示した。表１において、タイヤ耐久試験を通して故障を生じなかった場合を「○」で示し、試験時に故障を生じたものを「×」で示した。
【００１７】
【表１】

Figure 0004076380
この表１から判るように、キャップコンパウンドのガラス転移点が−３３℃の試験タイヤＡは、高温条件での耐久性には問題がないものの、極低温条件での耐久試験ではグルーブクラックを生じていた。一方、キャップコンパウンドのガラス転移点が−６０℃の試験タイヤＢは、高温条件での耐久試験及び極低温条件での耐久試験のいずれにおいても問題がなかった。つまり、本発明の室内タイヤ耐久試験方法によれば、極低温条件でのタイヤ耐久性を十分に見極めることができる。
【００１８】
【発明の効果】
以上説明したように本発明によれば、室温を空調装置により制御する恒温室を備えた室内タイヤ耐久試験機を使用し、恒温室内の雰囲気温度を０°以下の所定の温度に制御した状態でタイヤの走行と停止とを繰り返しながら停車中にタイヤが負荷される条件下でタイヤ耐久試験を実施するから、極低温条件でのタイヤ耐久性の評価を室内タイヤ耐久試験機を用いて長期間にわたって連続的に実施することができる。
【図面の簡単な説明】
【図１】本発明の室内タイヤ耐久試験方法を実施するための室内タイヤ耐久試験機を示す側面図である。
【図２】本発明の室内タイヤ耐久試験方法を実施するための他の室内タイヤ耐久試験機を示す側面図である。
【符号の説明】
１ 空調装置
２ 恒温室
３ 支持台
４ モータ
５ ベルト
６ ドラム
７ 台車
８ 重量体
９ 試験荷重負荷部
１０ 基礎
１１ ヒータ（凍上防止装置）
Ｔ タイヤ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an indoor tire durability test method and a testing machine, and more particularly, an indoor tire durability test method and testing machine that enables an evaluation of tire durability under extremely low temperature conditions to be performed with an indoor tire durability testing machine. About.
[0002]
[Prior art]
Conventionally, when a tire endurance test is performed using an indoor tire endurance tester, generally, the higher the room temperature, the more severe the condition for the tire, so the test is typically performed at an ambient temperature of about 38 ° C. . However, depending on the characteristics of the tire, the extremely low temperature conditions in the market may be more severe use conditions, and it is also important to evaluate the tire durability under such extremely low temperature conditions. In particular, in tires employing new materials such as thermoplastic resins, there is a strong demand for evaluating durability at 0 ° C. or lower.
[0003]
However, since the conventional indoor tire durability tester assumes a durability test under a high temperature condition as described above, it has not been possible to carry out a durability test under a cryogenic condition. In winter, it is possible to carry out endurance tests under cryogenic conditions outdoors. In this case, since the test period and test location are limited, it is possible to efficiently evaluate tire durability. could not.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide an indoor tire durability test method and a testing machine that enable the evaluation of tire durability under cryogenic conditions to be carried out with an indoor tire durability testing machine.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the indoor tire durability test method of the present invention uses an indoor tire durability tester equipped with a temperature-controlled room whose room temperature is controlled by an air conditioner, and the ambient temperature in the temperature-controlled room is a predetermined value of 0 ° or less. The tire endurance test is carried out under the condition that the tire is loaded during the stop while the tire is repeatedly driven and stopped in the state controlled to the above temperature.
[0006]
In this way, using an indoor tire durability tester equipped with a temperature-controlled room that controls the room temperature by an air conditioner, and performing the tire durability test in a state where the atmospheric temperature in the temperature-controlled room is controlled to a predetermined temperature of 0 ° or less, Evaluation of tire durability under cryogenic conditions can be performed efficiently regardless of the season using an indoor tire durability tester.
[0007]
The indoor tire durability test method of the present invention will be carried out tire durability test under the conditions tire during stop repeating and stopping the running of the tire is loaded, this time, is loaded tire during stop position It is better to set conditions so that
[0008]
On the other hand, an indoor tire durability tester of the present invention for achieving the above object includes a temperature-controlled room whose room temperature is controlled by an air conditioner , and at least a tire to be tested and a drum for rolling the tire are arranged in the temperature-controlled room On the other hand, a motor for driving the drum is arranged outside the temperature-controlled room, and a test load load portion that applies a load to the tire when the tire is pressed against the outer peripheral surface of the drum is arranged in the temperature-controlled room The tire endurance test is performed under the condition that the tire is loaded while the vehicle is stopped while repeating the running and stopping of the tire while the atmospheric temperature in the temperature-controlled room is controlled to a predetermined temperature of 0 ° or less. it is characterized in that the the.
[0009]
Thus, when configuring an indoor tire durability tester equipped with a temperature-controlled room that controls the room temperature by an air conditioner, the test tire and the drum are arranged in the temperature-controlled room, while the motor is arranged outside the temperature-controlled room, Evaluation of tire durability under cryogenic conditions can be continuously performed while avoiding freezing of the motor. In particular, if a frost heave prevention device such as a heater is interposed in the base of the support base on which the drum and the tire are mounted, it is possible to prevent the base from freezing and to perform a long-term continuous test.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
[0011]
FIG. 1 shows an indoor tire durability tester for carrying out the indoor tire durability test method of the present invention. As shown in FIG. 1, the indoor tire durability tester of this embodiment includes a temperature-controlled room 2 that controls the room temperature by an air conditioner 1. A support base 3 </ b> A is disposed outside the temperature-controlled room 2, and a support base 3 </ b> B is disposed inside the temperature-controlled room 2. A motor 4 is mounted on a support 3 </ b> A outside the temperature-controlled room 2. On the other hand, a drum 6 driven by a motor 4 via a belt 5 and a carriage 7 having a tire support portion that rotatably supports a tire T are mounted on a support base 3B inside the temperature-controlled room 2. ing. The carriage 7 is movable in a direction orthogonal to the rotation axis of the drum 6 and receives the load from the test load load portion 9 having the weight body 8 so as to press the tire T against the outer peripheral surface of the drum 6. It has become. The support bases 3A and 3B are installed via foundations 10A and 10B, respectively. The base 10B of the support base 3B is provided with a heater 11 as an anti-frosting device.
[0012]
Usually, at an atmospheric temperature of 0 ° C. or lower, the basis of the testing machine freezes up, so that it is difficult to perform a test that requires a long period of time, such as a tire durability test. Therefore, in the indoor tire endurance tester, as a means for preventing the base from freezing, the base 10B of the support base 3B on which the drum 6 and the tire T are mounted is provided with a freezing prevention device including the heater 11. Therefore, even if the ambient temperature is 0 ° C. or lower, the tire durability test can be continuously performed over a long period of time while preventing the base from freezing. Such a frost heave prevention device is preferably equipped, but it may be one without a frost heave prevention device as shown in FIG.
[0013]
When the tire durability test is performed using the indoor tire durability tester, the load on the tire T is set based on the weight of the weight body 8, and the traveling speed of the tire T is set based on the rotational speed of the motor 4. The atmospheric temperature in the temperature-controlled room 2 is set by the air conditioner 1. The air conditioner 1 has a function of cooling at least the atmospheric temperature in the temperature-controlled room 2 to 0 ° C. or less. However, in order to enable a tire durability test in a wide temperature range, the atmospheric temperature in the temperature-controlled room 2 is changed. For example, it is desirable to have a function of adjusting in the range of −40 to 40 ° C.
[0014]
Next, the indoor tire durability test method of the present invention will be described. In the present invention, the tire endurance test is carried out using the indoor tire endurance tester and controlling the atmospheric temperature in the temperature-controlled room 2 to a predetermined temperature of 0 ° or less. In the tire running test at an environmental temperature near the embrittlement temperature of the tread rubber, the most severe condition for the tire is when the tire starts when the tire temperature is close to the environmental temperature. Moreover, the use conditions of 0 ° C. or less are extremely severe conditions for tires containing thermoplastic resins. The present invention makes it possible to evaluate the tire durability under these cryogenic conditions using an indoor tire durability tester. According to the present invention, for example, the occurrence of groove cracks due to embrittlement of tread rubber can be examined, and the low temperature durability of each tire component can be evaluated.
[0015]
In the indoor tire durability test method of the present invention, for example, the tire durability test can be performed while repeating running and stopping of the tire at a predetermined time. According to such a test, a driving environment closer to the actual environment can be reproduced. In repeating the running and stopping of the tire, the running time and the stopping time can be arbitrarily set according to the required performance of the tire. Further, if the position where the tire is loaded during the stop is made constant, the flat spot generating portion becomes the same part, and durability (crack resistance, etc.) against the deformation can be evaluated under very severe conditions.
[0016]
【Example】
As shown in Table 1, the indoor tire durability test method of the present invention was performed on pneumatic tires having a tire size of 205 / 60R15. In Table 1, test tire A is a tire using an SBR cap compound having a glass transition point Tg of −33 ° C., and test tire B is an NR cap compound having a glass transition point Tg of −60 ° C. Tire. In constant speed traveling, the vehicle traveled continuously for 10 days at 40 km / h, and in intermittent traveling, a traveling cycle of traveling for 20 minutes at 40 km / h and then stopping for 40 minutes was repeated for 30 days. However, when a failure such as a groove crack occurred, the test was terminated at that time. The results of the tire durability test are also shown in Table 1. In Table 1, the case where no failure occurred during the tire durability test was indicated by “◯”, and the case where failure occurred during the test was indicated by “X”.
[0017]
[Table 1]
Figure 0004076380
As can be seen from Table 1, the test tire A whose cap compound has a glass transition point of −33 ° C. has no problem in durability under a high temperature condition, but has a groove crack in a durability test under a cryogenic condition. It was. On the other hand, the test tire B having a glass transition point of −60 ° C. of the cap compound had no problem in both the durability test under the high temperature condition and the durability test under the extremely low temperature condition. That is, according to the indoor tire durability test method of the present invention, it is possible to sufficiently determine the tire durability under extremely low temperature conditions.
[0018]
【The invention's effect】
As described above, according to the present invention, an indoor tire endurance tester equipped with a temperature-controlled room whose room temperature is controlled by an air conditioner is used, and the atmospheric temperature in the temperature-controlled room is controlled to a predetermined temperature of 0 ° or less. Since the tire durability test is performed under conditions where the tire is loaded while the vehicle is stopped while repeating running and stopping of the tire, evaluation of the tire durability under extremely low temperature conditions is performed over a long period of time using an indoor tire durability tester. It can be carried out continuously.
[Brief description of the drawings]
FIG. 1 is a side view showing an indoor tire durability tester for carrying out an indoor tire durability test method of the present invention.
FIG. 2 is a side view showing another indoor tire durability tester for carrying out the indoor tire durability test method of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Temperature-controlled room 3 Support stand 4 Motor 5 Belt 6 Drum 7 Carriage 8 Weight body 9 Test load loading part 10 Foundation 11 Heater (freezing prevention device)
T tire

Claims (9)

室温を空調装置により制御する恒温室を備えた室内タイヤ耐久試験機を使用し、前記恒温室内の雰囲気温度を０°以下の所定の温度に制御した状態でタイヤの走行と停止とを繰り返しながら停止中にタイヤが負荷される条件下でタイヤ耐久試験を実施する室内タイヤ耐久試験方法。Using an indoor tire endurance tester equipped with a temperature-controlled room that controls the room temperature with an air conditioner, and stopping and repeating the running and stopping of the tire with the atmospheric temperature inside the temperature-controlled room controlled to a predetermined temperature of 0 ° or less An indoor tire endurance test method in which a tire endurance test is performed under a condition in which the tire is loaded . 熱可塑性樹脂を含むタイヤを試験対象とする請求項１に記載の室内タイヤ耐久試験方法。The indoor tire durability test method according to claim 1, wherein a test object is a tire containing a thermoplastic resin . 停止中にタイヤが負荷される位置を一定にするようにした請求項１又は請求項２に記載の室内タイヤ耐久試験方法。The indoor tire durability test method according to claim 1 or 2, wherein a position where the tire is loaded during a stop is made constant. 前記室内タイヤ耐久試験機が、少なくとも試験されるタイヤと該タイヤを転動させるドラムを前記恒温室内に配置する一方で、前記ドラムを駆動するモータを前記恒温室の外部に配置し、前記タイヤを前記ドラムの外周面に押し付ける際に該タイヤに負荷を与える試験荷重負荷部を前記恒温室内に配置したものである請求項１〜３のいずれかに記載の室内タイヤ耐久試験方法。The indoor tire durability testing machine arranges at least a tire to be tested and a drum for rolling the tire in the temperature-controlled room, while a motor for driving the drum is arranged outside the temperature-controlled room, The indoor tire durability test method according to any one of claims 1 to 3, wherein a test load load portion that applies a load to the tire when pressed against the outer peripheral surface of the drum is disposed in the temperature-controlled room. 前記室内タイヤ耐久試験機が、前記ドラム及び前記タイヤを搭載する支持台の基礎に凍上予防装置を介在させたものである請求項４に記載の室内タイヤ耐久試験方法。The indoor tire durability test method according to claim 4, wherein the indoor tire durability tester includes a frost heave prevention device interposed on a base of a support base on which the drum and the tire are mounted. 室温を空調装置により制御する恒温室を備え、少なくとも試験されるタイヤと該タイヤを転動させるドラムを前記恒温室内に配置する一方で、前記ドラムを駆動するモータを前記恒温室の外部に配置し、前記タイヤを前記ドラムの外周面に押し付ける際に該タイヤに負荷を与える試験荷重負荷部を前記恒温室内に配置した構成を有し、前記恒温室内の雰囲気温度を０°以下の所定の温度に制御した状態でタイヤの走行と停止とを繰り返しながら停止中にタイヤが負荷される条件下でタイヤ耐久試験を実施するようにした室内タイヤ耐久試験機。Comprising a thermostatic chamber controlled by the air conditioner at room temperature, while placing a drum for rolling the tire and the tire to be at least tested the thermostatic chamber was placed a motor for driving the drum to the outside of the thermostatic chamber And a test load loading portion for applying a load to the tire when the tire is pressed against the outer peripheral surface of the drum. The atmosphere temperature in the temperature-controlled room is set to a predetermined temperature of 0 ° or less. An indoor tire endurance tester that performs tire endurance tests under conditions in which the tire is loaded during stop while repeatedly running and stopping the tire in a controlled state . 前記ドラム及び前記タイヤを搭載する支持台の基礎に凍上予防装置を介在させた請求項５に記載の室内タイヤ耐久試験機。The indoor tire durability tester according to claim 5 , wherein a frost heave prevention device is interposed on a foundation of a support base on which the drum and the tire are mounted. 熱可塑性樹脂を含むタイヤを試験対象とする請求項６又は請求項７に記載の室内タイヤ耐久試験機。The indoor tire durability testing machine according to claim 6 or 7, wherein a tire containing a thermoplastic resin is a test object. 停止中にタイヤが負荷される位置を一定にするようにした請求項６〜８のいずれかに記載の室内タイヤ耐久試験機。The indoor tire durability tester according to any one of claims 6 to 8, wherein a position where the tire is loaded during a stop is made constant.
JP2002195556A 2002-07-04 2002-07-04 Indoor tire durability test method and testing machine Expired - Lifetime JP4076380B2 (en)

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US9428018B2 (en) 2012-12-28 2016-08-30 Bridgestone Americas Tire Operations, Llc Scalable vehicle models for indoor tire testing
JP2015072215A (en) * 2013-10-03 2015-04-16 株式会社ブリヂストン Tire testing device and method
US11255755B2 (en) 2017-06-30 2022-02-22 Bridgestone Americas Tire Operations, Llc Enclosure system for indoor tire testing
KR102066057B1 (en) 2018-10-26 2020-01-14 금호타이어 주식회사 Apparatus and Method for Testing Low Temperature Endurance of Tire
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