| 摘要 |
A supporting apparatus for supporting a movable member such that the movable member is movable along a predetermined path. The apparatus includes a main frame which defines a reference plane parallel to the predetermined path; at least one base member which is supported by the main frame and which supports the movable member such that the movable member is movable on the at least one base member along the predetermined path; at least one positioning device which positions the at least one base member relative to the main frame in at least one first direction parallel to the reference plane and a second direction perpendicular to the reference plane, such that the at least one base member is permitted to be displaced relative to the main frame in a third direction opposite to the second direction; and at least one biasing device which biases the at least one base member toward the main frame in at least the second direction.
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