Abstract: In an apparatus for detecting a position of a table, the table moves along a first track having a target position located within a predetermined range. The position detecting apparatus has a movable member and a detecting mechanism. The movable member is movable along a second track. The detecting mechanism detects the movable member when it reaches a predetermined point on the second track. The detecting apparatus further has a transmission mechanism for transmitting the movement of the table to the movable member. The transmission mechanism transmits the movement of the moving object to the movable member at a first transmission ratio moving distance of the movable member/moving distance of the table when the table passes within the predetermined range on the first track, and at a second transmission ratio smaller than the first transmission ratio when the table passes outside the predetermined range on the first track.

Abstract: An axis of rotation of a bed can be shifted in a direction in which it becomes remote from a floor when the bed is slid parallel to a patient-mounted plane while being swung, in a case where the swing angle is relatively small. The amount of elevation of the bed can be made larger than in a case where the axis of rotation is not shifted. The amount of slide of the bed can be thus made smaller than in the case wherein the axis of rotation is not shifted, in order to obtain a predetermined amount of elevation of the bed. As the result, the horizontal component of slide can be made smaller to thereby making smaller the space in which the bed can be swung and slid.