| 摘要 |
A vacuum tube lift device includes a lifting tube ( 1 ), the lifting tube ( 1 ) having a first end ( 2 ) for attachment of the lifting tube ( 1 ) and a second end ( 5 ) for connection to a means ( 6 ) for coupling the lifting tube ( 1 ) to a load ( 7 ). The lifting tube ( 1 ) is adapted for connection to a vacuum source ( 3 ) and is extendable and retractable in order to achieve an extending or retracting movement of the lifting tube ( 1 ) for movement of a load ( 7 ) by means of regulating the pressure inside the lifting tube ( 1 ). Furthermore, the device includes at least one supporting unit ( 15 ) providing at least one point of support ( 36 ), and at least one extendable and retractable portion ( 16 ) of the lifting tube ( 1 ) is arranged to support itself on the point of support ( 36 ) and to travel over the point of support ( 36 ) during an extending or retracting movement of the lifting tube ( 1 ), for movement of said extendable and retractable portion ( 16 ) in a first direction ( 13 a) on a first side ( 17 ) of the point of support ( 36 ) and in a second direction ( 14 a), being different from the first direction ( 13 a), on a second side ( 18 ) of the point of support ( 36 ). |
