Lift cable slack monitoring device and method
A lift drive unit has at least one monitoring device for monitoring unallowed raising of a lift cage. The drive unit has a motor unit and a deflecting unit. If a counterweight supported by the deflecting unit, for example rests on a shaft pit buffer, the deflecting unit is unloaded and is raised by...
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| Main Author | |
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| Format | Patent |
| Language | English |
| Published |
19.04.2011
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| Online Access | Get full text |
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| Summary: | A lift drive unit has at least one monitoring device for monitoring unallowed raising of a lift cage. The drive unit has a motor unit and a deflecting unit. If a counterweight supported by the deflecting unit, for example rests on a shaft pit buffer, the deflecting unit is unloaded and is raised by way of a spring element of the monitoring device. A sensor of the monitoring device detects the movement of the deflecting unit and switches off the motor of the drive unit via a safety circuit. |
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