| 摘要 |
<p>PURPOSE:To provide an elevating/sinking device not requiring oil supply by constituting it from a floating electric magnet, a locational electric magnet, props and rack plates, and vertically moving the undermost rack plate so as to be capable of being located by the amperage fed to the winding of the locational electric magnet. CONSTITUTION:Current is fed to a floating electric magnet 1, and the magnetic pole surfaces 1c, 1d are magnetized in N-pole and S-pole. When current is thereafter fed to a locational electric magnet 2, the magnetic pole end faces 2c, 2d oppositely situated to the magnetic pole surfaces 1c, 1d are magnetized in S-pole and N-pole. Then the undermost rack plate 4d is put afloat by the locational electric magnet 2 through the repulsive actions of its S-polar end face 4a with the mentioned S-polar magnetic pole end face 2c, and also its N-polar end face 4b with the mentioned N-polar magnetic pole end face 2d. Accordingly if the amperage to the locational electric magnet 2 is adjusted and the magnetic field generated from the magnetic pole end faces 2c, 2d is controlled, the floating-up distance of the undermost rack plate 4d can be varied. If this undermost rack plate 4d is moved up and down, all rack plates 4 piled up over it with appropriate spacings will also move up and down. Also the rack plates 4 can in the whole be moved up and down through the repulsive force between the locational electric magnet 2 and undermost rack plate 4d.</p> |
