| 摘要 |
The present invention is provided with: legs (1A, 1B); a top board (2); top board support mechanisms (3A, 3B) which form a left-and-right pair and with which both end portions of the top board (2) are supported by each of the respective legs (1A, 1B) so as to be capable of flap operation from a usage posture (U) to a flip-up posture (F); a coupling beam (4) which couples both of the top board support mechanisms (3A, 3B) together or the legs (1A, 1B) together; and a top board anti-deflection member (8), provided on the lower surface (21) of the top plate (2), which has an abutting surface (82) which may abut the coupling beam (4) in the usage posture (U). The top board anti-deflection member (8) is provided with a facing surface (84) which is contiguous with the abutting surface (82), and in the area of operation from the flip-up posture (F) to the usage posture (U), is continually adjacent to, or in sliding contact with, the outer peripheral surface (41) of the coupling beam (4). |
