The utility model relates to the technical field of constructional
engineering, in particular to an
electric wire pay-off mechanism for constructional
engineering, which comprises two support frames, the two support frames are herringbone, when the
electric wire pay-off mechanism is used, an
electric wire winding drum is firstly sleeved on a mandrel, a triangular block is rotated, and a pull rod drives a limiting rod to move to expand the hollow part of the electric wire winding drum sleeve; then one end of a limiting rod is inserted into a limiting hole of a first fixing disc, a wire winding drum is fixed to the pay-off
assembly, then according to construction requirements, a rotary knob is rotated, reverse thread transmission of a
threaded rod is utilized, two supports slide along a sliding rod, the width of the pay-off
assembly is adjusted, wire coils of different models can be placed, in the pay-off process, a wire is led out of the pay-off
assembly, and the pay-off efficiency is improved. The guide ring at the bottom end of the cross rod is used for guiding, the accurate pay-off direction is ensured, when the wire reel needs to be replaced or the pay-off position needs to be adjusted, the triangular block is rotated again to loosen the limiting rod, the wire reel can be disassembled, and the whole operation process is simple and efficient.