| 摘要 |
<p>A locking vise for pipes, useful particularly but not exclusively in operations for welding portions of plastic pipe by polywelding of the head portion. The vise comprises two mutually opposite jaws (11, 12) which form, when clamped, a circular locking seat (13) for a portion of pipe. A slot (16) is formed on the grip surface (15) of each jaw (11, 12) in order to accommodate a corresponding portion of a body (17) for reducing the diameter of the circular locking seat (13) of the pipes. Means (20) for fixing to the corresponding jaw (11, 12) are further associated with each reduction body (17). The fixing means (20) comprise at least one locking pin (21), which can perform an axial translational motion and is inserted through the slot (16) transversely to the slot (16). The locking pin (21) has, in the axial direction, a first part (22), which forms, when arranged in the slot (16), an undercut (24) for preventing extraction for the reduction body (17), and a second part (23), which is recessed with respect to the first part (22) and forms, when arranged in the slot (16), a disengagement configuration for the reduction body (17).</p> |
