| 摘要 |
<p>At least one carriage moves along a toothed rack (5). A drive unit (6) in the form of a cog wheel has an axis at right angles to the toothed rack. The drive unit has a pressure appliance and a closed belt (12) toothed on both sides and which runs round the drive wheel and round a deflector spaced apart from it. The inner toothing of the toothed belt engages with the cogging of the drive wheel, and the outer toothing of the toothed belt engages with the cogging of the toothed rack. The pressure appliance applies pressure towards the toothed rack onto the inside of a section of the toothed belt engaging with the toothed rack.</p> |
