PROBLEM TO BE SOLVED: To provide one completed lock actuation mechanism capable of simultaneously locking/unlocking all casters with locks.SOLUTION: The lock actuation mechanism includes two parallel frame members 10, a shaft member 15, an operation member 17 provided at one end of the shaft member 15, and a vertically movable member 19 fixing operation rods 51 extending upward from the support shafts 60 of casters 50 with locks arranged at both ends of the frame members 10 at both end parts thereof and vertically movable. The shaft member 15 is provided so as to penetrate both side faces 11 for forming the groove part 13 of the frame member 10 and rotated below the vertically movable member 19. An eccentric cam member 25 is provided in the portion of the shaft member 15 penetrating the groove part 13 of the frame member 10. When the operation member 17 is rotated in one direction, both vertically movable members 19 move downward to lock all the casters, and when the operation member 17 is reversely rotated, the locking of all the casters is released.SELECTED DRAWING: Figure 3
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