| 摘要 |
A press has a bush (56) set in a cylinder (54) which may then be rotated to position a stud (14) over a sheet of metal into which it is to be inserted. The cylinder is then lowered to insert and fix the stud in place. In a stud delivery system, studs (14) are fed through a delivery tube (12) shank first into a breech (20) in which a pair of pivoted members (24, 26) form a half barrel. The pivoted members (24, 26) are biased towards each other and their ends remote from the delivery tube (12) are shaped to form a conical aperture (34). A thrust member (38) can push a stud (14) along the breech (20) so that the stud tip passes into the tapered aperture (34), the stud shaft then being horizontal. As the stud is pushed further along the breech, passage of the stud head (18) through the tapered aperture (34) forces the pivoted members (24, 26) apart. After passage of the head (18), the pivot members (24, 26) return to their former position. |
