A call box mounting structure for a retrofit ladder

Abstract

The utility model discloses a kind of calling box fixing structure for reforming ladder, it is related to the field of elevator reform, to solve the problem that old calling box bottom box is left in wall hole in old ladder reform, leading to new calling box difficult to fix.It includes the bottom plate of thin wall-mounted calling box, bottom plate back surface is equipped with tensioner, tensioner contains stud, left and right pressing block, support and adjusting piece;The thread rotation direction of stud two ends is opposite, connects corresponding pressing block, drives pressing block synchronous reverse movement when rotating, so that pressing block top column is tightly pressed or separated from old bottom box inner wall.The structure does not need to block old bottom box, saves material and working hours;Through calling box front face wire hole operation, installation is convenient;Top column and support design enhance fixed firmness, adapt to a variety of old bottom box, easy mass production, effectively improve reform efficiency and stability.

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