JP5035991B2 - Rubber testing machine - Google Patents

Rubber testing machine Download PDF

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JP5035991B2
JP5035991B2 JP2008039522A JP2008039522A JP5035991B2 JP 5035991 B2 JP5035991 B2 JP 5035991B2 JP 2008039522 A JP2008039522 A JP 2008039522A JP 2008039522 A JP2008039522 A JP 2008039522A JP 5035991 B2 JP5035991 B2 JP 5035991B2
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rubber
test piece
road surface
rubber test
grindstone
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JP2009198276A (en
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恵造 芥川
亮 梶木
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Bridgestone Corp
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/56—Investigating resistance to wear or abrasion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/44—Resins; Plastics; Rubber; Leather
    • G01N33/445—Rubber

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Description

本発明はゴム試験機に関し、詳しくは、加硫ゴムの摩耗試験を行うためのゴム試験機、特には、自動車タイヤ用加硫ゴムの摩耗試験を行うためのゴム試験機に関する。   The present invention relates to a rubber testing machine, and more particularly, to a rubber testing machine for performing a wear test of vulcanized rubber, and more particularly to a rubber testing machine for performing a wear test of vulcanized rubber for automobile tires.

従来、加硫ゴムの摩耗試験を行うための装置として、ランボーン試験機が知られている（ＪＩＳ Ｋ６２６４）。ランボーン試験機は、円盤状の加硫ゴムからなる試験片と、円盤状の砥石または擬似路面とを、それぞれ独立して定められた回転数で回転させながら、試験片を砥石または擬似路面の外周面に押し付けるとともに、互いにスリップさせることにより試験片を摩耗させ、一定時間後に摩耗量を測定するものである。   Conventionally, a lambone tester is known as an apparatus for performing a vulcanized rubber abrasion test (JIS K6264). The Lambourn tester rotates a test piece made of a disc-shaped vulcanized rubber and a disc-shaped grindstone or a simulated road surface at an independently determined number of revolutions while rotating the test piece on the outer circumference of the grindstone or the simulated road surface. The test pieces are worn by being pressed against the surface and slipping each other, and the amount of wear is measured after a certain time.

また、ランボーン試験機において、ゴム試験片が砥石または擬似路面に対して一定のスリップ率となるよう回転させたときの試験片にかかる摩擦力を検出し、検出された摩擦力の各々とスリップ率とに基づいて定義される摩擦エネルギーから、ゴム摩耗度を測定する方法も公知である（特許文献１参照）。この測定方法では、路面とゴムとをいずれも軸を中心に回転可能に形成して、互いに曲面同士で接触させ、検出される前後力およびスリップ率より近似的に得られる摩擦エネルギー（＝すべり距離×摩擦力）から、ゴム摩耗度を求めている。   Also, in the Lambourn tester, the friction force applied to the test piece when the rubber test piece is rotated so as to have a constant slip rate with respect to the grindstone or the simulated road surface is detected, and each detected friction force and the slip rate are detected. A method of measuring the degree of rubber wear from the friction energy defined based on the above is also known (see Patent Document 1). In this measurement method, both the road surface and rubber are formed so as to be rotatable about an axis, are brought into contact with each other on curved surfaces, and friction energy (= slip distance) obtained approximately from the detected longitudinal force and slip ratio X Friction force) to determine the degree of rubber wear.

一方、タイヤ踏面のトレッドゴムのタイヤ転動および接地時の挙動をより精度よく再現することを目的とする装置として、タイヤ内に配置されたベルトの数値モデルからベルトの所定領域のタイヤ転動及び接地時のベルト変位情報を取得するベルト変位情報取得手段と、取得したベルト変位情報に基づき、ベルトモデルに取り付けたトレッドゴム試験片を路面モデルに接触させて、ベルトモデルで数値モデルのベルト変位を再現するベルト変位再現手段とを備えるタイヤトレッドゴムの挙動シミュレーション装置が提案されている（特許文献２参照）。このシミュレーション装置では、固定された路面に対し、複数のアクチュエータにより伸縮自在にゴムを変位させることができる。
特開平１１−３２６１６９号公報 特開２００７−２１６８９５号公報（特許請求の範囲等） On the other hand, as a device aiming to more accurately reproduce the tire rolling of the tread rubber on the tire tread and the behavior at the time of ground contact, the tire rolling of a predetermined region of the belt from the numerical model of the belt arranged in the tire and A belt displacement information acquisition means for acquiring belt displacement information at the time of ground contact, and a tread rubber test piece attached to the belt model is brought into contact with the road surface model based on the acquired belt displacement information, and the belt displacement of the numerical model is measured with the belt model. A tire tread rubber behavior simulation device including a belt displacement reproduction means to reproduce has been proposed (see Patent Document 2). In this simulation apparatus, the rubber can be displaced in a stretchable manner by a plurality of actuators with respect to a fixed road surface.
JP-A-11-326169 JP 2007-216895 A (Claims etc.)

ランボーン試験機や、回転中の路面にゴム試験片を断続的に接触させる従来の摩耗試験機は、タイヤなどの実際の製品が摩耗する際の挙動、すなわち、ゴムと路面とが摩耗する際の粘着状態およびすべり状態を再現し得るものではない。このように、タイヤの摩耗形態が再現できないことから、これら試験機で可能なタイヤの摩耗状況の再現には限度があり、実車走行時における摩耗順位と、これら試験機を用いたゴム材料の室内評価時における摩耗順位とは一致しない場合があった。したがって、実車走行時における摩耗状況に近い、より精確なゴム摩耗度を評価することが可能なゴム試験機の実現が求められていた。   The conventional wear testing machine that makes rubber test pieces contact the rotating road surface intermittently with the Lambourn testing machine, the behavior when the actual product such as tire wears, that is, when the rubber and the road surface wear It cannot reproduce the sticking state and the sliding state. In this way, since the tire wear form cannot be reproduced, there is a limit to the reproduction of the tire wear situation that can be performed with these test machines. The wear ranking at the time of evaluation sometimes did not match. Therefore, there has been a demand for the realization of a rubber testing machine that can evaluate a more accurate degree of rubber wear that is close to the wear situation during actual vehicle travel.

そこで本発明の目的は、上記問題を解消して、実際の摩耗時におけるゴムの挙動を精度良く再現することができ、これにより、測定されるゴム摩耗度を、実際の摩耗結果に精度よく対応させることの可能なゴム試験機を提供することにある。   Therefore, the object of the present invention is to solve the above-mentioned problems and to accurately reproduce the behavior of rubber during actual wear, thereby accurately measuring the degree of rubber wear measured with the actual wear result. An object of the present invention is to provide a rubber testing machine that can be made to operate.

本発明者は鋭意検討した結果、ゴム試験片に対し粘着および／またはすべりを付与するゴム試験機を用いることで、実際にゴムが摩耗する際の摩耗状況をより高精度に再現することができ、これにより上記課題を解決できることを見出して、本発明を完成するに至った。   As a result of intensive studies, the present inventor can reproduce the wear situation when the rubber is actually worn with higher accuracy by using a rubber tester that provides adhesion and / or slip to the rubber test piece. As a result, the inventors have found that the above problems can be solved, and have completed the present invention.

すなわち、本発明は、砥石または擬似路面にゴム試験片を押し付けて、該ゴム試験片の試験を行うゴム試験機であって、
前記砥石または擬似路面および前記ゴム試験片の双方を変位させて、変位する該砥石または擬似路面に対し該ゴム試験片を押圧させ、かつ、離隔させる機構を備え、該ゴム試験片に、該砥石または擬似路面に対する粘着および／またはすべりを与えることを特徴とするものである。 That is, the present invention is a rubber testing machine for testing a rubber test piece by pressing a rubber test piece on a grindstone or a pseudo road surface,
A mechanism is provided that displaces both the grindstone or the pseudo road surface and the rubber test piece, presses the rubber test piece against the displacing grindstone or the pseudo road surface, and separates the rubber test piece. Alternatively, it is characterized in that adhesion and / or slip to the simulated road surface is given.

本発明のゴム試験機においては、前記ゴム試験片をせん断変形させることが好ましい。本発明のゴム試験機は、前記砥石または擬似路面との間で前記ゴム試験片を摩耗させて、該砥石または擬似路面と該ゴム試験片との間の摩擦力を測定する、摩耗試験機として好適に使用可能である。また、本発明において、前記砥石または擬似路面の、前記ゴム試験片との接触部は平面状に形成することが好ましく、前記ゴム試験片の、前記砥石または擬似路面との接触部についても平面状に形成することが好ましい。   In the rubber testing machine of the present invention, it is preferable that the rubber test piece is subjected to shear deformation. The rubber testing machine of the present invention is an abrasion testing machine that wears the rubber test piece between the grindstone or the simulated road surface and measures the frictional force between the grindstone or simulated road surface and the rubber test piece. It can be suitably used. Further, in the present invention, the contact portion of the grindstone or the simulated road surface with the rubber test piece is preferably formed in a flat shape, and the contact portion of the rubber test piece with the grindstone or the simulated road surface is also planar. It is preferable to form.

さらに、本発明においては、前記ゴム試験片および前記砥石または擬似路面の双方の位置を、互いに独立に変動させることが好ましく、これにより、タイヤのトレッドブロックの接地から蹴り出しまでの現象を再現することができる。さらにまた、本発明のゴム試験機においては、前記砥石または擬似路面のうち、少なくとも前記ゴム試験片との接触部が、交換可能に形成されていることが好ましく、前記砥石または擬似路面のうち、少なくとも前記ゴム試験片との接触部が、温度制御可能に形成されていることも好ましい。さらにまた、本発明のゴム試験機は、前記砥石または擬似路面と前記ゴム試験片との接触部が観測可能な観測手段や、前記ゴム試験片の摩耗粉を除去する摩耗粉除去手段、前記ゴム試験片の、前記砥石または擬似路面との接触部の摩耗形状が計測可能な計測手段を備えることが好ましい。さらにまた、本発明のゴム試験方法は、砥石または擬似路面にゴム試験片を押し付けて、該ゴム試験片の試験を行うゴム試験方法であって、前記砥石または擬似路面および前記ゴム試験片の双方を変位させて、変位する該砥石または擬似路面に対し該ゴム試験片を押圧させた後、離隔させることで、該ゴム試験片に、該砥石または擬似路面に対する粘着および／またはすべりを与えることを特徴とするものである。   Furthermore, in the present invention, it is preferable that the positions of both the rubber test piece and the grindstone or the pseudo road surface are varied independently of each other, thereby reproducing the phenomenon from the contact of the tire tread block to the kicking-out. be able to. Furthermore, in the rubber testing machine of the present invention, it is preferable that at least a contact portion with the rubber test piece is formed so as to be replaceable among the grindstone or the pseudo road surface, and among the grindstone or the pseudo road surface, It is also preferable that at least the contact portion with the rubber test piece is formed so that the temperature can be controlled. Furthermore, the rubber testing machine of the present invention includes an observing means capable of observing a contact portion between the grindstone or the simulated road surface and the rubber test piece, a wear powder removing means for removing the wear powder of the rubber test piece, and the rubber. It is preferable to provide a measuring means capable of measuring the wear shape of the contact portion of the test piece with the grindstone or the simulated road surface. Furthermore, the rubber test method of the present invention is a rubber test method in which a rubber test piece is pressed against a grindstone or a pseudo road surface to test the rubber test piece, both of the grindstone or the pseudo road surface and the rubber test piece. The rubber test piece is pressed against the displacing grindstone or pseudo road surface, and then separated from the rubber test piece, thereby giving the rubber test piece adhesion and / or slip to the grindstone or pseudo road surface. It is a feature.

本発明によれば、上記構成としたことにより、タイヤなどの実際の製品が摩耗する際のゴムの挙動を精度良く再現することができ、これにより、測定されるゴム摩耗度を、実際の摩耗結果に精度よく対応させることの可能なゴム試験機を実現することが可能となった。   According to the present invention, the above configuration makes it possible to accurately reproduce the behavior of rubber when an actual product such as a tire is worn, and thereby the measured degree of rubber wear can be reduced to the actual wear. It has become possible to realize a rubber testing machine that can accurately correspond to the results.

以下、本発明の好適実施形態について、図面を参照しつつ詳細に説明する。
図１に、本発明のゴム試験機の一好適例の概略説明図を示す。図示するように、本発明のゴム試験機は、砥石または擬似路面（以下、単に「路面」ともいう）１１にゴム試験片１を押し付けて、このゴム試験片１の試験を行うものである。 DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a schematic explanatory diagram of a preferred example of the rubber testing machine of the present invention. As shown in the figure, the rubber tester of the present invention tests the rubber test piece 1 by pressing the rubber test piece 1 against a grindstone or a pseudo road surface (hereinafter also simply referred to as “road surface”) 11.

本発明のゴム試験機においては、ゴム試験片１を路面１１に対し変位させて、ゴム試験片１に、路面１１に対する粘着および／またはすべりを与える点に特徴がある。前述したように、従来のランボーン試験機等は、実際の摩耗時のゴムの挙動における粘着状態およびすべり状態を再現するものではないため、摩耗状態の再現にも限度があったが、本発明のゴム試験機においては、ゴム試験片１に対し粘着および／またはすべりを与えることで、より高精度にゴムの挙動、特には摩耗状態を再現することが可能となった。したがって、本発明によれば、従来法に比しきわめて高い精度で、複数種のゴム材料間でのラボ評価による摩耗の優劣を、実車における優劣に精度よく合致させることが可能となる。   The rubber testing machine of the present invention is characterized in that the rubber test piece 1 is displaced with respect to the road surface 11 to give the rubber test piece 1 adhesion and / or slip to the road surface 11. As described above, the conventional lambone testing machine and the like do not reproduce the sticking state and the sliding state in the behavior of rubber during actual wear, so there was a limit to the reproduction of the wear state. In the rubber testing machine, by giving adhesion and / or slip to the rubber test piece 1, it becomes possible to reproduce the behavior of rubber, particularly the wear state, with higher accuracy. Therefore, according to the present invention, it is possible to accurately match the superiority or inferiority of the wear by the lab evaluation between a plurality of types of rubber materials with the superiority or inferiority of the actual vehicle with extremely high accuracy as compared with the conventional method.

このゴム試験片１に対する粘着および／またはすべりの付与は、例えば、図３に示すようにして行うことができる。図示する例では、ゴム試験片１の位置を垂直方向に移動させながら、路面１１の位置を水平方向に移動させている。このため、ゴム試験片１が垂直方向下方に移動して路面１１に接触した直後は、ゴム試験片１はせん断変形しながら路面１１に対し粘着して路面１１の移動に追随する（図中の（ｂ），（ｃ））。その後、ゴム試験片１のせん断変形の限界を超えると、ゴム試験片１と路面１１との間で粘着とともにすべりが生ずる（図中の（ｄ））。さらに、ゴム試験片１の移動方向を垂直方向上方に変えると、ゴム試験片１と路面１１との間は粘着がなくなってすべりのみになる（図中の（ｅ））。したがって、このように、ゴム試験片１および路面１１の双方の位置を、互いに独立に変動させることで、ゴム試験片１をせん断変形させつつ、ゴム試験片１に対し粘着および／またはすべりを付与することができる。また、図示はしないが、ゴム試験片１のみを路面１１に対し移動させて、ゴム試験片１に、路面１１に対する粘着および／またはすべりを与え、また、せん断変形を生じさせることも可能である。   Application of adhesion and / or slip to the rubber test piece 1 can be performed, for example, as shown in FIG. In the illustrated example, the position of the road surface 11 is moved in the horizontal direction while moving the position of the rubber test piece 1 in the vertical direction. Therefore, immediately after the rubber test piece 1 moves downward in the vertical direction and contacts the road surface 11, the rubber test piece 1 adheres to the road surface 11 while being deformed by shear and follows the movement of the road surface 11 (in the drawing). (B), (c)). Thereafter, when the limit of the shear deformation of the rubber test piece 1 is exceeded, slip occurs with adhesion between the rubber test piece 1 and the road surface 11 ((d) in the figure). Further, when the moving direction of the rubber test piece 1 is changed to the upper side in the vertical direction, the rubber test piece 1 and the road surface 11 are not sticked and only slip ((e) in the figure). Therefore, by sticking and / or slipping to the rubber test piece 1 while changing the positions of both the rubber test piece 1 and the road surface 11 independently of each other, the rubber test piece 1 is subjected to shear deformation. can do. Although not shown, it is also possible to move only the rubber test piece 1 relative to the road surface 11 to give the rubber test piece 1 adhesion and / or slip to the road surface 11 and to cause shear deformation. .

本発明のゴム試験機においては、上記のようにゴム試験片１に対し粘着および／またはすべりを付与することで、ゴム試験片１の摩耗時における挙動を、その粘着状態およびすべり状態を含む、実際により近い状態で再現することができる。したがって本発明のゴム試験機によれば、例えば、実車走行時におけるトレッドゴムの摩耗挙動を精度良くトレースしうるゴム摩耗試験（またはゴム摩擦試験、以下、本発明において「摩耗試験」と「摩擦試験」とは同義である）を行うことができ、これにより実車時のトレッドゴムのゴム摩耗度（摩耗量）を高精度に予想することが可能となる。   In the rubber testing machine of the present invention, the adhesion and / or slip is imparted to the rubber test piece 1 as described above, so that the behavior of the rubber test piece 1 during wear includes its sticky state and slip state. It can be reproduced in a state closer to reality. Therefore, according to the rubber testing machine of the present invention, for example, a rubber abrasion test (or a rubber friction test, hereinafter referred to as “abrasion test” and “friction test” in the present invention) that can accurately trace the wear behavior of the tread rubber during actual vehicle running. It is possible to predict the degree of rubber wear (amount of wear) of the tread rubber at the time of actual vehicle with high accuracy.

本発明のゴム試験機によるゴム摩耗試験は、具体的には、路面１１との間でゴム試験片１を摩耗させて、路面１１とゴム試験片１との間の摩擦力を測定することにより行うことができる。本発明においては、摩耗量が測定可能であるのみならず、上述のようにゴム試験片１が摩耗する際の粘着状態およびすべり状態を再現可能であって、従来法のようにスリップ率一定ではなくタイヤと同じかそれに近いスリップ率で、摩耗時においてゴム試験片１と路面１１との間で生ずるすべり距離および摩擦力をそれぞれ直接測定することが可能であるので、すべり距離×摩擦力により定義される摩耗エネルギーを直接算出することができる。また、ゴム試験片１を、路面１１に対しタイヤと同じメカニズムで接地させて摩耗させることができるので、結果として、実車予測性を著しく向上することが可能となる。   Specifically, the rubber abrasion test by the rubber testing machine of the present invention is performed by measuring the frictional force between the road surface 11 and the rubber test piece 1 by wearing the rubber test piece 1 with the road surface 11. It can be carried out. In the present invention, not only the wear amount can be measured, but also the adhesive state and the sliding state when the rubber test piece 1 is worn as described above can be reproduced, and the slip rate is not constant as in the conventional method. It is possible to directly measure the sliding distance and the frictional force generated between the rubber test piece 1 and the road surface 11 at the time of wear with the same slip ratio as that of the tire. The wear energy generated can be directly calculated. Further, since the rubber test piece 1 can be grounded and worn against the road surface 11 by the same mechanism as that of the tire, it is possible to significantly improve the actual vehicle predictability as a result.

本発明のゴム試験機において、砥石または擬似路面１１は、目的とする路面条件等の試験条件に合わせて、各種アスファルトやコンクリート、サンドペーパー、金網等の任意の材質および表面性状にて形成することが可能である。特には、少なくともゴム試験片１との接触部を含む部分を着脱可能に形成して、試験条件に応じて交換可能としておくことが好ましい。さらには、路面の温度条件を考慮して、路面１１の、ゴム試験片１との接触部を温度制御可能に形成しておくことも好ましい。   In the rubber testing machine of the present invention, the grindstone or the simulated road surface 11 is formed of any material and surface properties such as various asphalts, concrete, sandpaper, wire nets, etc. according to the test conditions such as the intended road surface conditions. Is possible. In particular, it is preferable that at least a portion including a contact portion with the rubber test piece 1 is formed so as to be detachable so that it can be exchanged according to test conditions. Furthermore, in consideration of the temperature condition of the road surface, it is also preferable to form the contact portion of the road surface 11 with the rubber test piece 1 so that the temperature can be controlled.

図示する例では、砥石または擬似路面１１は、ガイドレール１２に沿って水平平面内を往復移動可能に構成されており、また、ゴム試験片１は、治具（ホルダ）１３により固定されて、ガイドレール１４に沿って路面１１に対し垂直方向に往復運動するように構成されているが、これに制限されるものではない。路面１１およびゴム試験片１を図示するように構成することで、タイヤのトレッドブロックが路面に踏み込んでから蹴り出す際（接地〜蹴り出し）の動作を再現するように、これら路面１１およびゴム試験片１の動きを制御することができる。   In the illustrated example, the grindstone or pseudo road surface 11 is configured to be reciprocally movable in a horizontal plane along the guide rail 12, and the rubber test piece 1 is fixed by a jig (holder) 13; Although it is configured to reciprocate in the vertical direction with respect to the road surface 11 along the guide rail 14, it is not limited to this. By configuring the road surface 11 and the rubber test piece 1 as shown in the figure, the road surface 11 and the rubber test are reproduced so as to reproduce the operation when the tire tread block is stepped on the road surface and then kicked out (grounding to kicking out). The movement of the piece 1 can be controlled.

なお、図示するように、砥石または擬似路面１１のうち少なくともゴム試験片１との接触部については、平面状となるよう形成することが好ましい。また、ゴム試験片１についても、好適には図示するように、路面１１との接触部が平面状となるよう形成する。ランボーン試験のサンプルのように円周面を路面と接触させるものとした場合、軟らかいゴムと硬いゴムとで接触面積に差が生ずることになるが、このように接触部を平面状とすることで、ゴム試験片の硬さ等の物性が変わっても、ゴムと路面との接触面積を一定にすることができる。また、実際の路面のように平面にゴムが接触する場合と、ランボーン試験機のように曲率をもった路面にゴム試験片を接触させた場合とでは接触面の形状が異なるが、ゴム試験片や路面を平面とすることによって、この曲率の影響をなくして、実際のゴム製品が路面と接触したときと同じ状態を再現することが可能となる。さらに、本発明では、従来法とは異なり、ゴム試験片１の路面１１との接地部の形状については特に制限はないので、この接地部形状を適宜変更することで、例えば、タイヤにより異なる接地面の楕円形状に容易に対応させることもできる。   As shown in the drawing, it is preferable that at least a contact portion of the grindstone or the pseudo road surface 11 with the rubber test piece 1 is formed in a flat shape. The rubber test piece 1 is also preferably formed so that the contact portion with the road surface 11 is flat as shown in the figure. When the circumferential surface is brought into contact with the road surface as in the sample of the Lambourn test, there will be a difference in the contact area between the soft rubber and the hard rubber. Even if the physical properties such as the hardness of the rubber specimen change, the contact area between the rubber and the road surface can be made constant. Also, the shape of the contact surface is different between the case where the rubber is in contact with the flat surface as in the actual road surface and the case where the rubber test piece is in contact with the curved road surface as in the Lambourn test machine. By making the road surface flat, it is possible to eliminate the influence of this curvature and reproduce the same state as when an actual rubber product contacts the road surface. Further, in the present invention, unlike the conventional method, there is no particular limitation on the shape of the ground contact portion with the road surface 11 of the rubber test piece 1. It is also possible to easily correspond to the elliptical shape of the ground.

また、図示する例においては、路面１１を移動させるためのガイドレール１２には、ゴム試験片１にかかる垂直方向の荷重を測定するためのロードセル（荷重検出用）１５が配置されている。さらに、ゴム試験片１を移動させるためのガイドレール１４には、ゴム試験片１にかかる摩擦力を測定するためのロードセル（摩擦力検出用）１６が配置されている。   In the illustrated example, a load cell (for load detection) 15 for measuring a vertical load applied to the rubber test piece 1 is disposed on the guide rail 12 for moving the road surface 11. Furthermore, a load cell (for friction force detection) 16 for measuring the friction force applied to the rubber test piece 1 is disposed on the guide rail 14 for moving the rubber test piece 1.

図２に、本発明のゴム試験機の路面１１およびゴム試験片１近傍の拡大図を示す。図示するように、本発明のゴム試験機には、路面１１とゴム試験片１との接触部が観測可能な観測手段を設けることが好ましい。観測手段としては、カメラ１７や、３分力センサ１８等を用いることができる。図示する例では、路面１１にスリット１１ａを設けることで、路面下方からの、ゴム試験片１の接触部におけるスリップ挙動等の、カメラ１７による直接観察を可能にしている。また、３分力センサ１８は、ゴム試験片１の路面１１との接触部に掛かる摩擦力や荷重を直接測定できるように構成されている。   In FIG. 2, the enlarged view of the road surface 11 and the rubber test piece 1 vicinity of the rubber testing machine of this invention is shown. As shown in the figure, the rubber testing machine of the present invention is preferably provided with an observation means capable of observing the contact portion between the road surface 11 and the rubber test piece 1. As the observation means, a camera 17, a three-component force sensor 18, or the like can be used. In the illustrated example, by providing the slit 11 a on the road surface 11, the camera 17 can directly observe the slip behavior at the contact portion of the rubber test piece 1 from below the road surface. The three-component force sensor 18 is configured to directly measure the frictional force and load applied to the contact portion of the rubber test piece 1 with the road surface 11.

さらに、図示はしないが、本発明のゴム試験機には、ゴム試験片１の路面１１との接触部の摩耗形状を計測するための計測手段として、レーザ等を配置することも好ましい。さらにまた、ゴム試験片１の摩耗試験を行う場合には、その摩耗粉を除去するための摩耗粉除去手段を設けることも好適である。   Furthermore, although not shown in the drawings, it is also preferable to arrange a laser or the like as a measuring means for measuring the wear shape of the contact portion of the rubber test piece 1 with the road surface 11 in the rubber testing machine of the present invention. Furthermore, when a wear test of the rubber test piece 1 is performed, it is also preferable to provide a wear powder removing means for removing the wear powder.

本発明のゴム試験機の一好適例を示す概略説明図である。It is a schematic explanatory drawing which shows one suitable example of the rubber testing machine of this invention. 本発明のゴム試験機における路面およびゴム試験片近傍を示す拡大図である。It is an enlarged view which shows the road surface and rubber test piece vicinity in the rubber testing machine of this invention. ゴム試験片と路面との間の接触状態の推移を示す説明図である。It is explanatory drawing which shows transition of the contact state between a rubber test piece and a road surface.

符号の説明Explanation of symbols

１ ゴム試験片
１１ 砥石または擬似路面
１１ａ スリット
１２，１４ ガイドレール
１３ 治具（ホルダ）
１５ ロードセル（荷重検出用）
１６ （摩擦力検出用）
１７ カメラ
１８ ３分力センサ DESCRIPTION OF SYMBOLS 1 Rubber test piece 11 Grinding wheel or simulated road surface 11a Slit 12, 14 Guide rail 13 Jig (holder)
15 Load cell (for load detection)
16 (For friction force detection)
17 Camera 18 3 component force sensor

Claims (13)

砥石または擬似路面にゴム試験片を押し付けて、該ゴム試験片の試験を行うゴム試験機であって、
前記砥石または擬似路面および前記ゴム試験片の双方を変位させて、変位する該砥石または擬似路面に対し該ゴム試験片を押圧させ、かつ、離隔させる機構を備え、該ゴム試験片に、該砥石または擬似路面に対する粘着および／またはすべりを与えることを特徴とするゴム試験機。 A rubber testing machine for testing a rubber test piece by pressing a rubber test piece on a grindstone or a simulated road surface,
Wherein by displacing both the grinding wheel or the simulated road surface and the rubber test piece against displacement to the whetstone or simulated road surface is pressed against the rubber test piece, and comprises a mechanism for separation, to the rubber test piece, the grinding wheel Alternatively, a rubber testing machine characterized by providing adhesion and / or slip to a simulated road surface. 前記ゴム試験片をせん断変形させる請求項１記載のゴム試験機。   The rubber testing machine according to claim 1, wherein the rubber test piece is subjected to shear deformation. 前記砥石または擬似路面との間で前記ゴム試験片を摩耗させて、該砥石または擬似路面と該ゴム試験片との間の摩擦力を測定する摩耗試験機である請求項１または２記載のゴム試験機。   The rubber according to claim 1 or 2, wherein the rubber test piece is worn between the grindstone or the simulated road surface and the friction test force is measured between the grindstone or the simulated road surface and the rubber test piece. testing machine. 前記砥石または擬似路面の、前記ゴム試験片との接触部が平面状に形成されている請求項１〜３のうちいずれか一項記載のゴム試験機。   The rubber testing machine as described in any one of Claims 1-3 in which the contact part with the said rubber test piece of the said grindstone or a pseudo road surface is formed in planar shape. 前記ゴム試験片の、前記砥石または擬似路面との接触部が平面状に形成されている請求項１〜４のうちいずれか一項記載のゴム試験機。   The rubber testing machine as described in any one of Claims 1-4 in which the contact part with the said grindstone or the pseudo road surface of the said rubber test piece is formed in planar shape. 前記ゴム試験片および前記砥石または擬似路面の双方の位置を、互いに独立に変動させる請求項１〜５のうちいずれか一項記載のゴム試験機。   The rubber testing machine according to any one of claims 1 to 5, wherein the positions of both the rubber test piece and the grindstone or the pseudo road surface are varied independently of each other. 前記ゴム試験片および前記砥石または擬似路面の双方の位置を互いに独立して変動させて、タイヤのトレッドブロックの接地から蹴り出しまでの現象を再現する請求項１〜６のうちいずれか一項記載のゴム試験機。   The position of both the said rubber test piece and the said grindstone, or a pseudo road surface is fluctuate | varied independently mutually, The phenomenon from the contact of a tread block of a tire to kicking out is reproduced. Rubber testing machine. 前記砥石または擬似路面のうち、少なくとも前記ゴム試験片との接触部が、交換可能に形成されている請求項１〜７のうちいずれか一項記載のゴム試験機。   The rubber testing machine according to any one of claims 1 to 7, wherein at least a contact portion of the grindstone or the pseudo road surface with the rubber test piece is formed to be replaceable. 前記砥石または擬似路面のうち、少なくとも前記ゴム試験片との接触部が、温度制御可能に形成されている請求項１〜８のうちいずれか一項記載のゴム試験機。   The rubber testing machine according to any one of claims 1 to 8, wherein at least a contact portion with the rubber test piece of the grindstone or the pseudo road surface is formed so as to be temperature-controllable. 前記砥石または擬似路面と前記ゴム試験片との接触部が観測可能な、観測手段を備える請求項１〜９のうちいずれか一項記載のゴム試験機。   The rubber testing machine as described in any one of Claims 1-9 provided with the observation means which can observe the contact part of the said grindstone or a pseudo road surface, and the said rubber test piece. 前記ゴム試験片の摩耗粉を除去する摩耗粉除去手段を備える請求項３〜１０のうちいずれか一項記載のゴム試験機。   The rubber testing machine according to any one of claims 3 to 10, further comprising wear powder removing means for removing the wear powder of the rubber test piece. 前記ゴム試験片の、前記砥石または擬似路面との接触部の摩耗形状が計測可能な、計測手段を備える請求項３〜１１のうちいずれか一項記載のゴム試験機。   The rubber testing machine according to any one of claims 3 to 11, further comprising measuring means capable of measuring a wear shape of a contact portion of the rubber test piece with the grindstone or the pseudo road surface. 砥石または擬似路面にゴム試験片を押し付けて、該ゴム試験片の試験を行うゴム試験方法であって、A rubber test method for testing a rubber test piece by pressing a rubber test piece on a grindstone or a simulated road surface,
前記砥石または擬似路面および前記ゴム試験片の双方を変位させて、変位する該砥石または擬似路面に対し該ゴム試験片を押圧させた後、離隔させることで、該ゴム試験片に、該砥石または擬似路面に対する粘着および／またはすべりを与えることを特徴とするゴム試験方法。Both the grindstone or the pseudo road surface and the rubber test piece are displaced, and after the rubber test piece is pressed against the displacing grindstone or the pseudo road surface, the rubber test piece is separated from the rubber test piece. A rubber test method characterized by providing adhesion and / or slip to a simulated road surface.
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