| 摘要 |
PROBLEM TO BE SOLVED: To easily and speedily bring a table body to a using state or a storing state, provide a certain lock state in a simple lock mechanism in the using state of the table body, and prevent backlash of the table body in the using state. SOLUTION: The tip 45b of a substantially U-shaped spring rod 45 is disposed along a guide rail 37 disposed on the table body 35 longitudinally movably. A lock plate 51 is turnably disposed at a position facing to the base ends 45a side of the spring rod 45. The lock plate 51 is inserted between the base ends 45a of the spring rod 45 in the using state of the table body 35. The lock plate 51 is provided with a spring member 56 for energization in the locking direction, and a releasing lever 57 for turning the lock plate 51 in the lock releasing direction against the energization of the spring member 56.
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