| 摘要 |
PURPOSE:To prevent the groove face of a slidable coupler from wearing made by drag, by incorporating a rolling ball in a deep groove provided on a sleeve end of the slidable coupler in an axial direction. CONSTITUTION:When a ball 6a at an idle end side of a shaft component 2 moving in an axial direction against a sleeve component 1 is in a position touching a stopper 8, the ball 6a is in a expanded space 11 to be provided through a stepped part 10. When the shaft component 2 is moved in a direction of arrow A, even if rolling movement is prevented by holding the ball 6a between a spacer and the stopper 8 from occurring the ball 6a does not touch both incorporating grooves simultaneously. The shaft component 2 slides in an axial direction without resistance by rolling movement of the other balls 6b and 6c. |
