| 摘要 |
A foldable work piece support assembly ( 10 ) incorporating at least one rapid locking and quick release of article retaining means ( 26 ) for enabling rapid locking and quick release of articles required to be supported by the foldable support assembly/structure ( 1 ) the rapid locking and quick release article retaining means ( 26 ), including first and second clamp members ( 87, 79 ) providing first and second operationally co-operable clamping surfaces ( 81, 84 ) an elongate thrust member ( 60 ) supporting the second clamp member ( 79 ) for axial movement in a predetermined direction relative to the first clamp member ( 67 ) to enable variation of the separation between the clamping faces along said axial direction, a manually operable unidirectional drive means ( 89 ) for producing relative movement between the first and second clamp members ( 87, 79 ) to produce a required relative clamping, displacement between the first and second clamp members, means ( 95, 97, 98 ) for preventing movement of the thrust means ( 60 ) the reverse sense to said one sense said means being adapted for selective operation so as to allow relative movement of the members in the reverse sense.
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