Working gondola

A working gondola comprising:

• a gondola capable of carrying a worker for use in cleaning e.g. glass windows of a building structure;
• at least a pair of gondola support arms arranged at a distance from each other on the rooftop of the building structure and extending outward;
• a T-shaped suspender pivotably mounted to the upper of the gondola;
• a gondola driver system for winding and unwinding a pair of ropes which extend downward from the distal ends of their respective gondola support arms to two side ends of the suspender respectively for up-, down-, left-, and rightward movement of the gondola;
• a pair of supplementary rope guide cases having supplementary rope guide passages therein and mounted to two outer side walls of the gondola respectively;
• a pair of supplementary ropes coupled at one end to their respective gondola support arms or to proper locations of the rooftop of the building structure and hanging down through their respective supplementary rope guide passages of the two supplementary rope guide cases to the ground;
• two lock devices installed in the two supplementary rope guide cases respectively, each lock device having a lock lever which, when its corresponding supplementary rope is accidentally snapped off, will automatically be pressed down against the supplementary rope guide passage by the movement of the snapped rope extending through the supplementary rope guide passage;
• and
• two lock release retainer devices provided for urging their respective lock levers of the two lock devices in lock release directions for free movement of the supplementary ropes, each device being arranged to, when its corresponding supplementary rope is accidentally snapped, release the lock action of the lock device through tilting motion of the T-shaped suspender.