| 摘要 |
<p>[OBJECT] To provide a device which is held by vacuum on a wall surface or a window surface of glass of a building, and which is moved along the surface, thereby performing the cleaning operation. [SOLVING MEANS] In three clinging units which are arranged in a row, each of the clinging units includes clinging unit putting forward/backward means for putting the clinging unit in and out in a direction intersecting with the surface. The clinging units adjacent to each other are coupled by transverse expansion and contraction means via the clinging unit putting forward/backward means, so as to constitute a row clinging unit group. In three row clinging unit groups which are arranged in the longitudinal direction, the row clinging unit groups adjacent to each other are coupled by lengthwise expansion and contraction means via the clinging unit putting forward/backward means. Each of the clinging units can be selectively set in one of three states, i.e., a clinging and movable state in which the unit clings to the surface and moves along the surface, a clinging and locked state in which the unit clings to the surface and is locked to the surface, and a non-clinging and movable state in which the unit is separated from the surface and can move along the surface. Each of the clinging units is constituted at least by a clinging unit frame member, a vacuum sealing member attached to the clinging unit, moving means, and locking means. At least the surface, the clinging unit frame member, and the vacuum sealing member define a reduced pressure space in cooperation. The reduced pressure space is coupled to vacuum generating means and vacuum breaking means.</p> |
