| 摘要 |
<p>A device for cutting grooves in the ground, designed to be fitted behind a traction vehicle in conjunction with a device for placing a product in the ground, comprises a frame (9) and a number of cutting arms (11) which are disposed next to each other on the frame at right angles to the direction of travel and movable essentially in the vertical direction. Each cutter arm is made rigid and at the rear end, viewed in the direction of travel, bears a cutter (13) for cutting a groove in the ground, and near the front end, viewed in the direction of travel, is hingedly mounted in a vertical plane, the cutter arms are hingedly mounted on a common hinge pin (19) disposed at right angles to the direction of travel and carried by the frame. A spring (30) which has the tendency to press the rear end of a cutter arm (11) with the cutter (12) downwards acts upon each arm (11) individually.</p> |
