JPH07151645A - Method and apparatus for testing durability of tire - Google Patents
Method and apparatus for testing durability of tireInfo
- Publication number
- JPH07151645A JPH07151645A JP5296902A JP29690293A JPH07151645A JP H07151645 A JPH07151645 A JP H07151645A JP 5296902 A JP5296902 A JP 5296902A JP 29690293 A JP29690293 A JP 29690293A JP H07151645 A JPH07151645 A JP H07151645A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- drum
- diameter
- load
- test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Tires In General (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、タイヤのトレッドセパ
レーション等の耐久力試験を行なうための試験方法と装
置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test method and device for carrying out a durability test such as tread separation of tires.
【0002】[0002]
【従来の技術】従来より、タイヤの耐久力試験は、基本
的にはドラム試験機と呼ばれる、比較的径の大きな金属
製ドラムを用いる方法により行なわれている。図4はそ
の1例を示すもので、モータ等の適宜駆動手段により回
転するロードドラム(11)の周面に対し、図の矢印方
向に移動可能なスピンドルシャフト(14)に取付けた
タイヤ(T)を対接させるとともに、油圧シリンダー装
置等の押動手段(15)によって、スビンドルシャフト
(14)を介してタイヤ(T)に所定の圧力(荷重)を
負荷させて、タイヤの耐久力試験等を行なうものであ
る。2. Description of the Related Art Conventionally, a tire durability test is basically carried out by a method called a drum tester, which uses a metal drum having a relatively large diameter. FIG. 4 shows an example thereof, in which a tire (T) mounted on a spindle shaft (14) movable in the arrow direction of the figure with respect to the peripheral surface of a load drum (11) rotated by an appropriate driving means such as a motor. ) Are contacted with each other, and a predetermined pressure (load) is applied to the tire (T) through the Sbindle shaft (14) by a pushing means (15) such as a hydraulic cylinder device to perform a tire durability test. And so on.
【0003】このようなドラム試験機は、タイヤの内圧
と、タイヤに負荷する荷重および速度の組合せによっ
て、故障の発生状況をある程度コントロールできるよう
になっている。例えばトレッドセパレーションはその故
障の一部であり、これによりタイヤの耐久力等の評価を
行なうものである。In such a drum testing machine, the occurrence of a failure can be controlled to some extent by the combination of the internal pressure of the tire and the load and speed applied to the tire. For example, the tread separation is a part of the failure, and the tire durability and the like are evaluated by the tread separation.
【0004】しかして、従来のドラム試験では、平坦路
面にできるだけ近い条件にするということから、タイヤ
の安全基準に準拠したものとして、直径がかなり大きい
ドラム(通常、直径1.7〜2.0m)が用いられ、し
かも外気や通風の影響を受けない室内に設置されてお
り、その室温を38℃前後にコントロールしながら試験
を行なっていた。In the conventional drum test, however, the condition is as close as possible to a flat road surface, so that the drum having a considerably large diameter (usually 1.7 to 2.0 m in diameter) is compliant with tire safety standards. ) Was used, and it was installed in a room that was not affected by outside air or ventilation, and the test was conducted while controlling the room temperature to around 38 ° C.
【0005】[0005]
【発明が解決しようとする課題】しかしながら、従来の
ドラム試験では、市場走行に対してその故障モードが一
致せず、タイヤの比較的細かな設計変更等の場合の市場
走行の代用評価、特に市場走行における歪に起因するト
レッドセパレーション等に対する細かな評価はできない
ものであった。However, in the conventional drum test, the failure mode does not coincide with the market running, and the substitute evaluation of the market running in the case of a relatively small design change of the tire or the like, especially the market running, is performed. It was not possible to make a detailed evaluation of the tread separation, etc. due to the distortion in running.
【0006】すなわち、市場走行では、主に繰り返し歪
による疲労によってトレッドセパレーション等の故障が
発生するのに対し、比較的高温の室内のドラム試験は、
タイヤの発熱のしやすさ及びタイヤを構成する部材同士
の接着力の耐熱性を測定するもので、故障モードが一致
しないものであった。That is, in the market driving, failures such as tread separation and the like mainly occur due to fatigue due to repeated strain, whereas the drum test in a relatively high temperature room is
The heat resistance of the tire is easily measured and the heat resistance of the adhesive force between the members forming the tire is measured, and the failure modes do not match.
【0007】また、タイヤ構造上の設計変更、例えばコ
ード層を包むゴム層の厚みの変更、あるいはカーカスプ
ライのコード数の変更等のごく細かな設計変更に対して
も、タイヤの発熱による影響のために、細かな評価がで
きないものであった。Further, even if the design of the tire structure is changed, for example, the thickness of the rubber layer wrapping the cord layer is changed, or the number of cords of the carcass ply is changed, the influence of the heat generated by the tire is also exerted. Therefore, it was not possible to make a detailed evaluation.
【0008】そのため、特に上記歪によるトレッドセパ
レーションに対しては、市場走行の代用評価は殆どでき
ないものとされていた。Therefore, it has been considered that the substitute evaluation of the traveling on the market can hardly be performed especially for the tread separation due to the above distortion.
【0009】本発明は、上記に鑑みてなしたものであ
り、ドラム試験によって細い設計変更に対する評価、特
に市場走行の代用評価ができるタイヤの耐久力試験方法
とその装置を提供するものである。The present invention has been made in view of the above circumstances, and provides a tire durability test method and apparatus capable of evaluating a small design change by a drum test, in particular, a substitute evaluation for market driving.
【0010】[0010]
【課題を解決するための手段】上記の課題を解決する本
発明のタイヤの耐久力試験方法は、外気や通風による冷
却効果のある場所において、試験するタイヤの径の70
〜100%の直径のロードドラムを設置し、このロード
ドラムの外方に回転可能に支持したタイヤを、ドラム周
面に対し押接して該ロードドラムを回転させ、タイヤの
内部温度を熱セパレーションが発生しない温度に保ちな
がら、ドラム試験を行なうことを特徴とするものであ
る。According to the tire durability test method of the present invention for solving the above-mentioned problems, a tire having a diameter of 70 to be tested in a place having a cooling effect by outside air or ventilation.
A load drum having a diameter of -100% is installed, and a tire rotatably supported outside the load drum is pressed against the peripheral surface of the drum to rotate the load drum. It is characterized in that the drum test is conducted while maintaining the temperature at which it does not occur.
【0011】また上記方法を実施するための本発明のタ
イヤの耐久力試験装置は、屋内外における外気や通風に
よる冷却効果のある場所に設置されて自然条件に近く
し、モータ等の駆動手段により回転駆動可能に設けられ
たロードドラムと、該ロードドラムの外方において試験
するタイヤを回転可能に支持しかつ該タイヤをドラム周
面に対し押接し得るように設けたタイヤ支持手段とを備
え、前記ロードドラムは試験するタイヤの径の70〜1
00%の直径を有することを特徴とする。Further, the tire endurance test apparatus of the present invention for carrying out the above method is installed in a place having a cooling effect due to outside air or ventilation indoors or outdoors so as to be close to natural conditions, and is driven by a driving means such as a motor. A load drum rotatably provided, and a tire supporting means provided so as to rotatably support the tire to be tested outside the load drum and to press the tire against the drum peripheral surface, The road drum has a diameter of 70 to 1 of the tire to be tested.
It is characterized by having a diameter of 00%.
【0012】[0012]
【作用】上記の本発明の耐久力試験方法によれば、試験
するタイヤをロードドラムの周面に所定の荷重を負荷し
て押接した状態でロードドラムを回転させると、このロ
ードドラムの直径がタイヤ径の70〜100%で、ロー
ドドラムとしては比較的径小のものであるため、タイヤ
押接部(接地部)における回転走行方向の前後両端部に
近いほど、比較的径の大きいドラムを使用する従来法に
比べてタイヤの変形の度合、つまり歪が大きくなる。そ
れゆえタイヤ押接部の中央部で従来と同じ撓み量を与え
ても、タイヤに対して大きな繰り返し歪を与え疲労を促
進することができる。According to the above-mentioned durability test method of the present invention, when the tire to be tested is rotated while the load drum is pressed against the peripheral surface of the load drum under a predetermined load, the diameter of the load drum is measured. Is 70 to 100% of the tire diameter, and is a relatively small diameter as a road drum. Therefore, a drum having a relatively large diameter is closer to the front and rear ends in the rotational traveling direction of the tire pressing portion (ground contact portion). The degree of deformation of the tire, that is, the strain becomes larger than that of the conventional method using the. Therefore, even if the same amount of flexure is applied to the central portion of the tire pressing portion as in the conventional case, a large repetitive strain is applied to the tire to promote fatigue.
【0013】また、前記のようにタイヤの歪みが大きく
なることによって、タイヤの発熱も上昇することになる
が、本発明の場合は、試験装置を屋外もしくは屋内の外
気や通風による冷却効果のある場所に設置しての試験で
あるため、比較的低い温度の外気との接触や通風作用に
よる冷却によって、タイヤの発熱を抑えて過度の温度上
昇を防止することができる。そのため、タイヤの内部温
度を熱セパレーションが発生しない温度に保ち易く、該
温度を保ちながらドラム試験を実施することが容易に可
能になる。Further, as the tire strain increases as described above, the heat generation of the tire also rises. However, in the case of the present invention, the test apparatus has a cooling effect by the outside air or indoor outside air or ventilation. Since the test is installed in a place, it is possible to suppress the heat generation of the tire and prevent an excessive temperature rise by contacting with outside air having a relatively low temperature and cooling by ventilation. Therefore, the internal temperature of the tire can be easily maintained at a temperature at which thermal separation does not occur, and the drum test can be easily performed while maintaining the temperature.
【0014】[0014]
【実施例】次に本発明の実例を図面に基いて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An example of the present invention will be described with reference to the drawings.
【0015】図1〜図2は本発明のタイヤの耐久力試験
方法を実施する装置を示し、この装置は外気や通風によ
る冷却効果のある場所に設置されている。例えば、通風
性のよい屋外(建物外部)、あるいは軒下や屋根のない
囲いのある場所、さらに屋内では、屋根だけで四周に囲
い壁を有さない場所、一部を開放した囲い壁を有する場
所や上方で開放した囲い壁を有する場所、比較的広い屋
内の場所その他の比較的通気性がよくて、外気温と殆ど
変らない温度雰囲気を保持して、冷却効果を発揮できる
場所に設置される。1 and 2 show an apparatus for carrying out the tire endurance test method of the present invention, which is installed in a place where there is a cooling effect by the outside air or ventilation. For example, a well-ventilated outdoors (outside the building), a place with an eaves or an enclosure without a roof, and indoors, a place with only a roof and no enclosure on all four sides, or an enclosure with an open enclosure. Or a place with an enclosure wall open above, a relatively large indoor place, or other place with a relatively good breathability and a temperature effect that does not change much from the outside air temperature and that can exert a cooling effect .
【0016】図において、(1)は回転軸(2)を介し
てモータ等の駆動手段(3)により回転駆動されるロー
ドドラムである。このロードドラム(1)は、試験対象
のタイヤ(T)の径の70〜100%の直径(ドラム
径)を有するものよりなる。例えば、タイヤ径が60c
mの場合、ドラム径は42〜60cmに設定する。この
ロードドラム(1)の回転速度(走行速度)はモータ等
の駆動手段(3)の出力によって適宜設定できるように
設けられる。In the figure, (1) is a load drum which is rotationally driven by driving means (3) such as a motor via a rotary shaft (2). The road drum (1) is made of a material having a diameter (drum diameter) of 70 to 100% of the diameter of the tire (T) to be tested. For example, the tire diameter is 60c
In the case of m, the drum diameter is set to 42 to 60 cm. The rotational speed (traveling speed) of the load drum (1) is provided so that it can be set appropriately by the output of the driving means (3) such as a motor.
【0017】(4)は前記ロードドラム(1)の外方に
配したタイヤ支持手段(5)を構成する支持シャフト
で、試験するタイヤ(T)を回転可能に取付支持できる
ように設けられている。この支持シャフト(4)は、電
動モータ等による押動手段(図示省略)によりドラム径
方向に移動可能に設けられ、これに取付けたタイヤ
(T)をドラム周面に対し押接でき、かつ該タイヤ
(T)に所定の荷重を負荷した状態でドラム周面に対し
押接できるようになっている。タイヤに負荷する荷重
は、運転操作部(図示省略)での操作によって適宜調整
できるように設けられる。Reference numeral (4) is a supporting shaft which constitutes a tire supporting means (5) arranged outside the load drum (1), and is provided so as to rotatably mount and support a tire (T) to be tested. There is. The support shaft (4) is provided so as to be movable in the drum radial direction by a pushing means (not shown) such as an electric motor, and the tire (T) attached thereto can be pushed against the peripheral surface of the drum. The tire (T) can be pressed against the peripheral surface of the drum with a predetermined load being applied. The load applied to the tire is provided so that it can be appropriately adjusted by an operation on a driving operation unit (not shown).
【0018】なお、図示する実施例の場合、前記のタイ
ヤ(T)を取付支持する支持シャフト(4)が、ロード
ドラム(1)の両側に対向して配されている。また図の
ように、ロードドラム(1)の回転軸(2)およびタイ
ヤの支持シャフト(4)を水平に設置するほか、これら
を垂直に設置して実施することができる。In the illustrated embodiment, the support shafts (4) for mounting and supporting the tire (T) are arranged on both sides of the road drum (1) so as to face each other. Further, as shown in the figure, the rotating shaft (2) of the load drum (1) and the supporting shaft (4) of the tire may be installed horizontally or may be installed vertically.
【0019】いずれにしても、タイヤ(T)に負荷する
荷重、ロードドラム(1)の回転速度は、タイヤ(T)
の内圧に応じて任意に調整、設定できるようにする。特
にタイヤ(T)の内部温度を熱による影響を受けない発
熱温度に維持できるように設ける。In any case, the load applied to the tire (T) and the rotation speed of the load drum (1) are
Allows to be adjusted and set arbitrarily according to the internal pressure of. In particular, the tire (T) is provided so that the internal temperature can be maintained at a heat generation temperature that is not affected by heat.
【0020】上記の試験装置によるタイヤの耐久力試験
方法の実施について説明する。The implementation of the tire durability test method using the above-described test apparatus will be described.
【0021】試験しようとするタイヤ(T)を支持シャ
フト(4)に取付けて支持した状態で、ロード(1)の
周面に押接させるとともに、タイヤサイズや種類および
内圧に応じた所定の荷重を負荷し、タイヤ押接部(6)
の中央部で所定の撓み量を与えて、ロードドラム(1)
を所定速度で回転させる。With the tire (T) to be tested attached to the support shaft (4) and being supported, the tire (T) is pressed against the peripheral surface of the road (1) and a predetermined load according to the tire size, type and internal pressure is applied. Load the tire pressing part (6)
Giving a certain amount of deflection at the center of the load drum (1)
Is rotated at a predetermined speed.
【0022】この際、ロードドラム(1)に押接したタ
イヤ(T)は、ロードドラム(1)の直径がタイヤ径の
70〜100%で、従来のドラムと比べてかなり径小で
あるため、図3に示すように、従来のドラム(破線)に
よる場合と同じ撓み量を与えても、その回転走行方向の
前後端部(イ)での変形の度合は、従来の径の大きいド
ラムによる場合に比して大きくなり、それだけタイヤ
(T)に大きな歪を与えることができる。At this time, the tire (T) pressed against the road drum (1) has a diameter of the road drum (1) of 70 to 100% of the tire diameter, which is considerably smaller than that of the conventional drum. As shown in FIG. 3, even if the same amount of bending as that of the conventional drum (broken line) is given, the degree of deformation at the front and rear end portions (a) in the rotational traveling direction of the conventional drum (dashed line) depends on the conventional drum having a large diameter. As compared with the case, the tire (T) can be greatly distorted.
【0023】そのため、歪によるトレッドセパレーショ
ンを従来よりも早く短時間に発生させることができる。Therefore, tread separation due to strain can be generated earlier and in a shorter time than before.
【0024】しかも、前記のように歪が大きくなる分、
タイヤ(T)のゴム発熱も上昇することになるが、試験
装置は上記したように、例えば通風性のよい屋外や屋内
でも通風による冷却効果のある場所に設置されているた
めに、比較的低い温度の外気との接触や通風作用による
冷却効果によって、タイヤの発熱を抑えることができ、
タイヤの内部温度を、例えばタイヤの故障にほとんど影
響を与えない温度に容易に保つことができる。特に、タ
イヤの内圧、負荷荷重および回転速度等の条件を、タイ
ヤが熱による影響を受けない発熱温度を維持するように
調整し保持することが容易に可能になる。Moreover, as the distortion increases as described above,
The rubber heat generation of the tire (T) also rises, but as described above, the test apparatus is relatively low because it is installed in a place with good ventilation, such as outdoors or indoors, where there is a cooling effect by ventilation. Due to the cooling effect of the temperature contact with the outside air and the ventilation effect, heat generation of the tire can be suppressed,
The internal temperature of the tire can be easily kept at a temperature that hardly affects the failure of the tire, for example. In particular, it becomes possible to easily adjust and hold the conditions such as the internal pressure of the tire, the applied load, and the rotation speed so that the tire maintains a heat generation temperature that is not affected by heat.
【0025】そのため発熱によるセパレーションの発生
を防止でき、市場走行での故障モードに一致した故障、
例えば歪による疲労によって生じるトレッドセパレーシ
ョン等を確実に発生させることができ、市場走行の代用
評価、特に細かな設計変更の評価をドラム試験で行なえ
ることになる。Therefore, it is possible to prevent the occurrence of separation due to heat generation, and a failure corresponding to the failure mode in market driving,
For example, it is possible to reliably generate tread separation or the like caused by fatigue due to strain, and it is possible to perform substitutional evaluation of market driving, especially evaluation of small design changes by a drum test.
【0026】例えば、同じ乗用車用ラジアルタイヤ(サ
イズ:185/70R14)について、従来法によるド
ラム試験と、本発明方法による試験(屋外設置)とを実
施したところ、従来法の場合には、タイヤ温度がかなり
高くなり、約20000km走行で熱によるトレッド・
ベルト間セパレーションが生じたが、本発明方法による
場合は、タイヤ温度は従来法に比して20〜30%低く
抑えることができ、熱セパレーションは発生せず、約4
0000km走行で疲労によるトレッド・ベルト間セパ
レーションが生じた。For example, the same radial tire for passenger cars (size: 185 / 70R14) was subjected to a drum test according to the conventional method and a test according to the method of the present invention (outdoor installation). Is considerably higher, and the tread due to heat when running about 20,000 km
Although belt-to-belt separation occurred, in the case of the method of the present invention, the tire temperature can be suppressed to 20 to 30% lower than that in the conventional method, and thermal separation does not occur.
Separation between the tread and belt occurred due to fatigue after running 0000 km.
【0027】しかも、疲労によるセパレーションを市場
走行に比べてはるかに短時間に発生させることができる
ので、その評価期間は市場走行による場合の1/10以
下で済み、また大型のドラムを使用しないため、その設
備コストが従来法に比べて低く、例えばタイヤ1本あた
り従来の1/5以下になる。Moreover, since the separation due to fatigue can be generated in a much shorter time than in the case of driving on the market, the evaluation period is 1/10 or less of that in the case of driving on the market, and a large drum is not used. However, the equipment cost thereof is lower than that of the conventional method, and is, for example, 1/5 or less of the conventional tire per tire.
【0028】[0028]
【発明の効果】上記したように本発明の試験方法および
装置によれば、タイヤに対して大きな歪を与えることが
できるので、歪による疲労によって生じるトレッドセパ
レーション等を従来よりも早く短時間に発生させること
ができる。しかも屋内外の外気や通風による冷却効果の
ある場所に設置したことによる冷却効果で、タイヤの過
度の発熱を抑えて、熱の影響を防いで疲労によるセパレ
ーションを確実に発生させることができ、市場と一致し
た故障モードが得られる。As described above, according to the test method and apparatus of the present invention, since a large strain can be applied to the tire, tread separation and the like caused by fatigue due to strain are generated earlier and in a shorter time than before. Can be made. Moreover, by installing in a place where there is a cooling effect due to outside air and ventilation inside and outside, it is possible to suppress excessive heat generation of the tire, prevent the influence of heat and reliably generate separation due to fatigue. A failure mode corresponding to is obtained.
【0029】したがって、本発明によれば、ドラム試験
によって細かい設計変更に対する評価、市場走行の代用
評価を行なうことができ、またその評価期間も短く、設
備コストも低減できる。Therefore, according to the present invention, it is possible to evaluate a minute design change by a drum test and to perform a substitute evaluation for market driving, and the evaluation period is short and the facility cost can be reduced.
【図1】本発明の1実施例を示す概略平面図である。FIG. 1 is a schematic plan view showing an embodiment of the present invention.
【図2】同上の正面図である。FIG. 2 is a front view of the above.
【図3】試験状態を示す部分拡大図である。FIG. 3 is a partially enlarged view showing a test state.
【図4】従来のドラム試験機の概略を示す正面図であ
る。FIG. 4 is a front view showing an outline of a conventional drum testing machine.
(1) ロードドラム (2) 回転軸 (3) 駆動手段 (4) 支持シャフト (5) 支持手段 (6) タイヤ押接部 (イ) 前後両端部 (1) Load drum (2) Rotating shaft (3) Drive means (4) Support shaft (5) Support means (6) Tire pressing portion (a) Front and rear end portions
Claims (2)
いて、試験するタイヤの径の70〜100%の直径のロ
ードドラムを設置し、このロードドラムの外方に回転可
能に支持したタイヤを、ドラム周面に対し押接して該ロ
ードドラムを回転させ、タイヤの内部温度を熱セパレー
ションが発生しない温度に保ちながら、ドラム試験を行
なうことを特徴とするタイヤの耐久力試験方法。1. A tire in which a road drum having a diameter of 70 to 100% of the diameter of a tire to be tested is installed in a place having a cooling effect by outside air or ventilation, and a tire rotatably supported on the outside of the road drum, A tire durability test method, characterized in that a drum test is carried out while pressing the peripheral surface of a drum to rotate the load drum and maintaining the internal temperature of the tire at a temperature at which thermal separation does not occur.
のある場所に設置されており、モータ等の駆動手段によ
り回転駆動可能に設けられたロードドラムと、該ロード
ドラムの外方において試験するタイヤを回転可能に支持
しかつ該タイヤをドラム周面に対し押接し得るように設
けたタイヤ支持手段とを備え、前記ロードドラムは試験
するタイヤの径の70〜100%の直径を有することを
特徴とするタイヤの耐久力試験装置。2. A road drum, which is installed indoors and outdoors and has a cooling effect by outside air or ventilation, and is rotatably driven by a driving means such as a motor, and a tire to be tested outside the load drum. A tire supporting means rotatably supporting the tire and being capable of pressing the tire against the peripheral surface of the drum, wherein the road drum has a diameter of 70 to 100% of the diameter of the tire to be tested. Endurance test equipment for tires.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5296902A JPH07151645A (en) | 1993-11-26 | 1993-11-26 | Method and apparatus for testing durability of tire |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5296902A JPH07151645A (en) | 1993-11-26 | 1993-11-26 | Method and apparatus for testing durability of tire |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07151645A true JPH07151645A (en) | 1995-06-16 |
Family
ID=17839641
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5296902A Withdrawn JPH07151645A (en) | 1993-11-26 | 1993-11-26 | Method and apparatus for testing durability of tire |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07151645A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100353109B1 (en) * | 1999-10-26 | 2002-09-16 | 금호산업 주식회사 | Test Equipment of The Twin Tire |
KR100489266B1 (en) * | 1998-11-11 | 2005-08-12 | 한국타이어 주식회사 | Tire bead durability test device |
JP2006170693A (en) * | 2004-12-14 | 2006-06-29 | Yokohama Rubber Co Ltd:The | Tire endurance test method |
JP2008128872A (en) * | 2006-11-22 | 2008-06-05 | Yokohama Rubber Co Ltd:The | Adjusting method of tire indoor travel tester |
JP2021041728A (en) * | 2019-09-06 | 2021-03-18 | 住友ゴム工業株式会社 | Tire testing device and testing method |
-
1993
- 1993-11-26 JP JP5296902A patent/JPH07151645A/en not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100489266B1 (en) * | 1998-11-11 | 2005-08-12 | 한국타이어 주식회사 | Tire bead durability test device |
KR100353109B1 (en) * | 1999-10-26 | 2002-09-16 | 금호산업 주식회사 | Test Equipment of The Twin Tire |
JP2006170693A (en) * | 2004-12-14 | 2006-06-29 | Yokohama Rubber Co Ltd:The | Tire endurance test method |
JP2008128872A (en) * | 2006-11-22 | 2008-06-05 | Yokohama Rubber Co Ltd:The | Adjusting method of tire indoor travel tester |
JP2021041728A (en) * | 2019-09-06 | 2021-03-18 | 住友ゴム工業株式会社 | Tire testing device and testing method |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010130 |