| 摘要 |
PCT No. PCT/EP92/01815 Sec. 371 Date Mar. 19, 1993 Sec. 102(e) Date Mar. 19, 1993 PCT Filed Aug. 9, 1992 PCT Pub. No. WO93/03226 PCT Pub. Date Feb. 18, 1993.The safety device for a drive unit of a vibration roller has a locking bar displaceable between a switch-off position and a locking position and is biased into its switch-off position. The drive unit is forcibly switched off when the locking bar is in its switch-off position. A switch lever is provided for manually operating the drive unit and can be coupled to a toothed rack with a coupling. The toothed rack is connected with a control cable to the drive unit and is biased into a position in which the drive unit is inoperative. A spring biases the coupling into a disengaged position in which the switch lever is disengaged from the toothed rack. The coupling is switchable from the disengaged position into an engaged position for operatively connecting the switch lever and the toothed rack and further into a locked engaged position. A device for blocking the toothed rack and the switch lever in the locked engaged position has a first toothed disk connected to the switch lever and a second disk connected to the locking bar. The second disk has an end face with an elastomer coating cooperating with the teeth of the first disk. |
