X-ray fluoroscopic/radiographic apparatus

Abstract

A main carriage has four wheels each of which is supported by a corresponding guide rail. The main carriage is reciprocated between a standby position and a photographing position along the guide rails through the wheels. The wheels engaged with the guide rails at the two sides of the apparatus housing are rotatably mounted at the main carriage. The wheel engaged with the edge of the main carriage at the side of a film convey mechanism is mounted on the main carriage to be movable along its moving direction (X direction). A guide plate is fixed on a main body of the main carriage, and a guide hole is formed in the guide rail to extend along the X direction. A pair of supports are engaged in the guide hole, and a support plate is fixed to the supports. A wheel is rotatably mounted on an end of the support plate. The support plate is biased by a tension spring in the retracting direction of the main carriage. When the main carriage is at the standby position, the support plate is moved in the advancing direction of the main carriage relative thereto since the wheel is stopped by a stopper. When the main carriage is at the photographing position, the support plate is projected in the retracting direction of the main carriage by the spring. The length of the guide rail can be shortened by a length corresponding to the moving distance of the support plate.