| 摘要 |
<p>This invention relates to an apparatus for booms, preferably so-called self-expanding booms, which comprises a plate arranged on a platform, which plate is rotatable by means of a motor unit, and which comprises a means for winding up the boom, which means is placed essentially vertically and essentially at the middle of the plate, and a means for feeding in the boom, which means is arranged at an outer portion of the platform. According to the invention the apparatus comprises the combination of the following features: the platform (2) and the motor unit (7)/feeding means (10) are designed in that way that the later ones can be plugged into and out from the platform; the plate is designed in that way that it can be driven by a gear pinion (9) which is arranged in the motor unit (7), and which goes into engagement with the plate when the motor unit is plugged into the platform; the feeding means (10) is designed and positioned in that way that the boom can be pressed together to a compact package when the boom is pulled in without need of extra guiding rolls.</p> |
