| 摘要 |
<p>1527632 Apparatus for cleaning vertical surfaces SANKO CO Ltd 24 Dec 1975 [28 Dec 1974] 52856/75 Heading B7H An apparatus for adhering to vertical walls comprises electromagnets or' suction cups 14 for holding the apparatus on the wall, and means for sequentially separating a wall adhering member from the wall, moving it relative to the apparatus and re-fixing it to the wall. In a first embodiment the wall adhering members 14 are electromagnets and are mounted on piston-rods 15a of cylinders 15, the rods passing through bases 12 slidably arranged between guides 11 so as to be movable along the length of the apparatus by pneumatic cylinders 13. The apparatus is driven by an air or electric motor 6 through wheels 2 and wheels 3 are steerable by means of pneumatic cylinder 10. The members 14 are urged against the wall by springs (16), (Fig. 2, not shown) at the underside of bases 12 and are lifted clear of the wall when air is supplied the vertical pneumatic cylinders 15. A solenoid actuated valve system and electronic control circuit controls air supply to cylinders 13, 15 (Figs. 3, 4, not shown). In operation both magnets MG1, MG2 are energized and cylinders 15 opened to atmosphere to allow springs 16 to urge the magnets to the wall. Cylinders 15 are then supplied with air to raise the rods 15a and force the wheels 2, 3 against the wall. To move ,the apparatus the motor 6 is started and one magnet MG1 is de-energized and is lifted by its cylinder 15. The cylinder 13 attached to MG1 is supplied with air, the other cylinder 13 being open to atmosphere, to move MG1. The magnet MG1 is then re-energized and its cylinder 13 opened to atmosphere. The cylinder 15 attached to MG1 is then opened to atmosphere and its spring 16 moves the magnet to the wall, and the cylinder 15 repressurized to pull the apparatus back to the wall. During movement of MG1, the cylinder 13 of MG2 is open to atmosphere. The cycle is repeated for movement of magnet MG2. Synchronization of the operating cycle of the magnets with the drive wheels 2 allows smooth movement of the apparatus. In another arrangement, Fig. 13, the cylinder 13 is used to aid movement of the apparatus. Instead of the cylinder opening to atmosphere at the end of movement of the magnet, it is pressurized in the opposite sense to pull the apparatus up. The sequence of operations is otherwise the same as the first embodiment. The electromagnets may be replaced by suction cups, Fig. 11, of elliptical plan and having inner and outer resilient walls 25, 32, the outer wall being softer than the inner. The cup, bottom 26 has spaced plates 27 attached thereto, these being connected to the piston-rod 15a of cylinder 15 for flexing the cup. A suction line 30 is connected to the cup, In a further embodiment (not shown) the apparatus is not self propelled but is connected to a cable of a winch mechanism which acts to raise or lower the apparatus on the wall.</p> |
