| 摘要 |
PURPOSE: To improve performance by constituting a hub-like connecting tool element of a central hub cylinder and a radial spokes. CONSTITUTION: In a hub-like connecting tool element 10 which is constituted of a central hub cylinder 11 and a radial spokes 12, a plurality of sockets 14 are provided in the radial direction and the sockets 14 are formed so as to be convenient to fitting from the side of the constitutional element 13. An annular channel 27 for forming the end part of a flange 26 is provided on the end part of the constitutional element 13. Each socket is formed by a pair of holding arms 16 being separated with each other and on each holding arm 16, a hooking projection 24 projected inward fitted in an annular channel of the constitutional element 13 is provided. Therefore, after the constitutional elements 13 are fitted to the connecting tool element 10 by fitting it from the side, the constitutional element 13 is strongly fixed in such a way that it is not pulled out in the radial direction to the connecting element 10. Performance is thereby improved. |
