Design of measuring device bracket for distance between elevator car and shaft wall

The distance between elevator car and shaft wall is an important index of elevator safety. Inappropriate distance may cause falling dangers. The traditional method of measuring the distance is complex and inefficient. The inspector needs to get on the car roof and operate the elevator stopping at appropriate positions in turn. Each time elevator stops, the inspector selects several points to measure. The device bracket designed in this article can make the inspection more convenient and efficient. The device is composed of a custom-designed bracket and multiple laser rangefinders which includes three horizontal ones and a vertical one. The bracket contains beam, bracket plane, telescopic bracket, adjustable screws, sliding block, magnetic base and telescopic legs. The device bracket can adjust the position and direction of the laser rangefinder and keep the device adsorbing on the car roof by magnetism. The device can measure and judge the results automatically, greatly reducing the dependence on the experience of inspectors. The measurement efficiency is significantly improved while the personnel occupation and elevator downtime are reduced. Through using this device bracket, the verification efficiency and accuracy of the inspection about the distance between elevator car and shaft wall can be significantly improved.