| 摘要 |
<p>A clamping device for duplicating machines for keys of special bit type, said key comprising a shank (10) provided at one end with an operating head (12) and at the other end with a substantially rectangular bit (14) provided with a notch (16) transverse to the shank axis and with a plurality of grooves (20) parallel to the shank axis, said device being characterised by comprising: two clamps (4, 8), each consisting of a fixed jaw (22) and a jaw (24) movable away from and towards the fixed jaw, one gripping surface of the jaws being substantially flat, the other gripping surface being provided with a vertical groove (36) for the insertion of that portion of the bit lying between the end of the shank and the transverse notch, and being further provided with a horizontal groove (38) for engagement by the shank, a block (40) facing the clamp of the key to be duplicated in correspondence with the bit thereof, said block defining a surrounding seat for the key bit, said block being provided with means for its vertical raising to form with its horizontal surface a support for a feeler device (66) acting on the key to be duplicated and associated with a milling cutter (68) acting on the bit of the key blank, said feeler device and said milling cutter being rigid with each other. <IMAGE></p> |
