| 摘要 |
PROBLEM TO BE SOLVED: To provide a stage for fluororoentogenography with a pressure cone driving mechanism which can easily press the belly by means of a pressure cone by a remote operating lever and can hold the pressure cone by a definite force even when the operating lever is released. SOLUTION: When a driving motor 10 is rotated by an operating lever, a driving sprocket 11 is rotated and the force is transmitted to an idler sprocket 12 through a chain 13. A block A 15 provided with a pressure cone 4 and a block B 16 provided with a counter wt. for its balance wt. are clamped on the chain 13 and the pressure cone 4 is moved up and down by rotating the driving motor 10. In this case, when the pressure cone 4 approaches a subject, the idler sprocket 12 is freely rotated and when it moves in the reverse direction, a one way clutch 18 and a shoe 23 for frictional resistance are provided so as to make a definite frictional force work on the idler sprocket 12. Therefore, even when the operating lever is released, the pressure cone is held by a definite force. |
