PROBLEM TO BE SOLVED: To provide a movable mechanism such as a machinery mechanism with an inexpensive waterproof and dustproof structure having a simple configuration.
SOLUTION: In this waterproof and dustproof structure, a liquid accumulation section 13 sandwiched by an inner side rising wall part 11 and an outer side rising wall part 12 of a stationary member 10 is provided in a part equivalent to an inlet of a clearance 30 between the stationary member 10 and a movement member 20. The movement member 20 performs movement while its tip part 21 is immersed in liquid LQ. The liquid LQ shields a region on an inner side of the device for a region on an outer side of the device to prevent intrusion of foreign matter such as mist and dust. Even if the clearance 30 is made comparatively wide, foreign matter intrusion preventing action is achieved. The direction of movement of the movement member 20 includes vertical, left and right, forward and backward, rotation directions or synthesis of them in accordance with type of the movable mechanism to which the waterproof and dustproof structure is applied. Working fluid used in a fluid bearing and working fluid used in a machine tool can be diverted to the liquid LQ.
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