Automatic absorption formula rail device that stretches out and draws back

The utility model discloses an automatic absorption formula rail device that stretches out and draws back, its characterized in that is fixed with the drum in insulating A -frame's upper end, installing the rail telescoping device in the drum, installing the cassette in one side of drum, the draw -in groove is installed to its opposite side, and it has the rail area to twine on the outer wall of rail telescoping device, the one end and the draw -in groove in rail area link together, and both ends respectively are equipped with a strong magnet about insulating A -frame's bottom. Since the technical scheme is used, the utility model discloses following beneficial effect has: the utility model is used for the indoor job site of transformer, distribution and high -tension apparatus, the quality is light, carries the aspect, and the installation of being convenient for has fine warning effect simultaneously, reminds the site work personnel that electrical equipment is electrified, prevents the staff to be close to, provides safeguard for electrical equipment safe operation and staff life safety.