Fault checking device

The utility model provides a fault inspection device. The fault inspection device comprises a base, open grooves are formed in the two sides of the base, fixing parts are arranged in the open grooves, a limiting plate is inserted into the middle of the top end between the two open grooves, a positioning plate is fixedly arranged in the middle of the top end of the base, an inspection mechanism is arranged on the positioning plate, and a bearing plate is arranged on one side of the positioning plate. Through the arrangement of the positioning part, the positioning part is clamped in a gap between two teeth on the surface of the step, the base is moved left and right, so that rollers of the inspection mechanism and a skirt guard panel of the escalator can operate through the transmission part, the inspection mechanism and the locking mechanism can operate, and under the action of the locking mechanism, the base is fixed to the fixing part; along with the operation of the escalator, the device enables the roller