ROTATION PREVENTIVE MECHANISM

To provide a rotation preventive mechanism for a slide component developing high durability by suppressing the occurrence of wear and breakage.SOLUTION: The rotation preventive mechanism is used for a slide component 1 where a rotational slide ring 4 to be rotated in the peripheral direction together with a rotation side element R mounted to a rotary shaft 2 and a stationary slide ring 6 fixed to a stationary side element S slide against each other, to prevent the rotation of the rotational slide ring 4 relative to the rotation side element R or the stationary slide ring 6 relative to the stationary side element S. The rotation preventive mechanism includes a recessed part 6b, and a fitted part 17 fitted into the recessed part 6b. In the inner face of the recessed part 6b or in the outer face of the fitted part 17, a groove part 6f is provided for introducing fluid.SELECTED DRAWING: Figure 4 【課題】摩耗や破損の発生を抑制して耐久性の高い摺動部品用の回り止め機構を提供する。【解決手段】回転軸２に取り付けられる回転側要素Ｒとともに周方向に回転する回転摺動環４と、静止側要素Ｓに固定される静止摺動環６とが相対摺動する摺動部品１に用いられ、回転摺動環４を回転側要素Ｒに対し回り止めし、若しくは静止摺動環６を静止側要素Ｓに対し回り止めする回り止め機構であって、回り止め機構は、凹部６ｂと、凹部６ｂ内に嵌入される嵌入部１７と、から構成されており、凹部６ｂの内面若しくは嵌入部１７の外面に、流体を導入する溝部６ｆが設けられている。【選択図】図４