Device used for detecting qualification of freight wagon bottom side door folder

The utility model relates to a device used for detecting qualification of a freight wagon bottom side door folder, belonging to the field of quality inspection. When the device provided by the utility model is applied, the width of a folder to be detected is detected in a width detection zone composed of a side plate and stop iron; the position of a round pin hole at the head of the folder to be detected is detected by the fact that whether a pin shaft can be inserted into a pin shaft through hole of the side plate and the round pin hole at the head of the folder to be detected at the same time; the length of the folder to be detected is detected by virtue of a zone between the edge at the rear end of a base plate and a standard line; and the vertical height of the tail part of the folder to be detected to the lower plane of the folder is measured by virtue of two height measuring blocks in different heights. The device provided by the utility model has a simple structure, integrates multiple measuring functi