| 摘要 |
<p>A safety control (belly button) (9) that is arranged on the handle of a tiller truck has as its object to prevent the operator from being squeezed for instance between the truck and a wall. Should this happen and the belly button is depressed this is on an inward protruding arm (21) provided with a magnet 22 that at this movement is moved so that it will influence one or several Hall elements belonging to the drive control (7, 8), at which however the magnet (22) is on the other side of a circuit card (20) that carries the Hall elements. The magnet (22) is in level with the Hall element that corresponds to the next fastest speed away from the operator, that is movement in the fork direction. The logic of the circuit card is programmed to activate an anti squeeze operation where the truck moves away from the operator until the button has been released and has returned to its initial position. <IMAGE></p> |
