| 摘要 |
PROBLEM TO BE SOLVED: To easily insert a fastening element in a sleeve. SOLUTION: Guide parts 30, 32 comprising curved projected surfaces 38, 40 whose cross sectional shape is an arc shape and taper surfaces 36, 42 brought into contact with the rear ends of the curved projected surfaces 38, 40, are arranged in an outside diameter part and an inside diameter part at the end of a sleeve 24. Under a condition that a pressurizing mechanism is loosened, a fastening element 44 with a shaft hole such as a gear, is fitted around the peripheral surface of the sleeve 24, and an axial fastening element 46 is fitted in the inside diameter part of the sleeve 24. When the fastening elements 44, 46 are inserted in the sleeve 24, the fastening elements 44, 46 are guided to the curved projected surface 38, 40 of the guide parts 30, 32 even though the fastening elements 44, 46 are slightly inclined against the sleeve 24 so that the directions thereof can be corrected, and smoothly inserted in the sleeve 24 without being hooked at the end of the sleeve 24. When the pressurizing mechanism is operated so as to compress a pressure medium in a pressure medium storing space part 28 after the fastening elements 44, 46 are inserted in, the inside diameter part of the sleeve 24 is contracted, and the outside diameter part thereof is expanded, therefore the fastening elements 44, 46 are fixed to the sleeve 24. |
