Conveyor for lifting appliances

Abstract

The invention discloses a conveyor for lifting appliances. The conveyor comprises a conveying chain used for conveying the lifting appliances. The conveying chain comprises a lifting section and a lifter, a station stopper is arranged in the upstream, along the conveying direction of the lifting appliances, of the lifting section, and a sensor switch, used for sensing the positions of the lifting appliances so as to turn on the station stopper, is arranged in the downstream of the lifting section. The conveyor further comprises a fourth stroke switch used for sensing whether the lifter starts to convey the lifting appliances or not. A temporary stopper, in a normally closed state, is arranged between the station stopper and the lifting section. A fifth stroke switch, used for sensing the positions of the lifting appliances and combining signals of the fourth stroke switch so as to turn on the temporary stopper, is further arranged in the downstream of the lifting section. By the arrangement of the temporary stopper in the lifting section and a plurality of stroke switches jointly controlling the temporary stopper, jamming and dropping of the lifting appliances due to misplacement of the same are avoided, and safety of conveyor operation is improved.

Description

technical field [0001] The invention relates to a transmission device, in particular to a transmission device for a spreader. Background technique [0002] At present, for some large-scale machinery manufacturing enterprises, the conveying mechanism composed of spreaders, conveying chains and elevators is generally arranged in the workshop to realize the conveying of large parts and reduce the labor intensity of workers. When a certain part needs to be transported, the part is fixed and lifted by the spreader, transported to the destination position through the conveyor chain, and then the spreader is lowered to a height suitable for manual operation by the elevator. For example, the patent document whose application number is CN201110325250.9 discloses a lifting transfer device, which includes a skid conveyor line and a spreader conveyor line arranged in parallel. In the side jacking machine, the first lifting platform is located below the skid conveying line, a roller bed...

AI Technical Summary

Problems solved by technology

However, when the PLC module is abnormal or the travel switch No. 14 is touched by mistake, the station stopper F2 will be put on the car by mistake, and there will be two consequences: (1) If the station stopper F2 is lowered on the lifting rail If the car is released by mistake during the process, the spreader that was released by mistake will fall down along the descending position of the lifting rail; will push against each other with the lifting rail

There is a great potential safety failure

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