| 摘要 |
PURPOSE:To enable it to lessen friction loss and carry out accurately an effective prevention against rotation, by providing spherical bodies at the position orthogonalized with each slit being configured in a fixed ring member and a movable scroll casing member respectively. CONSTITUTION:A spherical body 53 is set in a slit 51a configured in a fixed ring member 51 and a slit 2c of a movable scroll casing member 2 so configured as to be orthogonalized with said slit 51a each. With this condition, when the movable scroll casing member 2 rotates in an arrow direction, the slit 2a is dislocated from 2c shown in illustration with broken lines, and the spherical body 53 is consequently to be shifted to 53' due to slippage. Therefore, when the position of this spherical body 53 is kept up as it was, i.e., prior to rotation, the movable scroll casing member 2 is free from rotation. |
