我院一台TUR-350X线机,数次发生诊视床升降限位失灵,下降时床而撞在地面上,上升时链条联结块碰在牙轮上。最严重的一次是上升超限,将链条拉断。整个床面连同病人一起掉下来。开始认为是限位开关的撞块位置不合适,但调整后仍发生限位失灵故障。经仔细观察,才发现是床面的前后晃动造成了限位开关失灵。 In our hospital, a TUR-350X machine had several times that the bed was not able to move up and down. When it fell, it hit the floor and the chain block hit the roller. The most serious one is an increase in the limit, breaking the chain. The entire bed fell with the patient. It was considered that the position of the impact block of the limit switch was not suitable, but the limit failure failure still occurred after the adjustment. After careful observation, it was found that the back and forth shaking of the bed caused a failure of the limit switch.