| 摘要 |
A lifting eye 10 for a heavy object 12 such as a die comprises a stud 20 with a head 22, body portion 24 and threaded shank 26 fastened to a threaded bore in the object 12. The stud carries a ring 60 which it swivably trapped between a support member 70 and a base member 40 captive on the stud so as to pivot therearound. The base member has a central passage for the stud and a recess 44 with a shoulder 46 on which the stud's head rests. One or other of the base and ring support carries a slot 72 for the ring. The base and ring support are joined together either by screws (52, Figs 1 & 7), threaded interengagment (Figs 13 & 15) or welding (Fig 16). The stud can have a fastener driving portion (90, Fig 6) or by secured to the object using a necked tool (100, figs 10 & 12) passing through alignable bores 80, 82 in the base member and stud. Preferably the tool breaks off once the correct torque is reached. |
