| 摘要 |
A hinge assembly for connecting upper and lower sections (6, 12, Fig. 1) of a column comprises an upper member 2 attached to the upper column section and a lower member (8, Fig. 3) attached to the lower column section. The upper member 2 may pivot about a hinge 14 from a generally vertical position to a generally horizontal position. Two cover members 16, 18 are positioned about the circumference of the upper and lower members. Each cover member can pivot relative to the lower member to expose the upper member 2 and to enable the upper member 2 and upper column section to pivot from their initial vertical position to a horizontal position. One cover member 18 may be pivoted to a locking position in which it engages a lower part of the upper member 2 to prevent unwanted further pivoting of the upper member and the column section connected thereto. |
