| 摘要 |
PURPOSE: To make it possible to vertically and widely move a patient supporting device, and to obtain a comparatively lower minimum height by the structure that a table is supported through two arm members connected on a floor, at the same time these hinge motions are carried out by using a connecting-joint for keeping the relationship of a constant angle. CONSTITUTION: A horizontal table 10 kept at a projected position is provided by the first joint 12 of a one end portion 11. The joint 12 is connected to the one end portion of the first arm member 14, and the other end portion of the first arm member 14 is connected to the one end portion of the first arm member 14 through the joint 12. Further, the other end portion of the arm member 18 is supported by the third joint 21 located on a base seat 23 fixed on a floor 29, and the arm members 14, 18 can be rotated around the center of a horizontal axes 15, 19, 22 by using the above joints. Each of joints 12, 17, 21 is controlled so as to synchronously move the arm members 14, 18 by an angular motion in which the rotating motions (α,β,δ) of the arm member 14, 18 and the table is made so as to beα=β=δand the joints 12, 17, 21 are made so as to vertically move the table while horizontally keeping the table.
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