| 摘要 |
Method and device for gripping one or more elongated element(s), which device includes two main gripping arms ( 1, 2 ) adapted to hold the element(s) between them. At least one first hydraulic cylinder ( 6, 7 ) is provided for moving the main gripping arms relative to one another. The device also has at least one auxiliary gripping arm ( 3, 4 ) and at least one second hydraulic cylinder ( 8, 9 ) for moving the auxiliary gripping arm relative to the main gripping arms in order to press the element(s) against the main gripping arms. The second hydraulic cylinder ( 8, 9 ) is connected operationally to the first hydraulic cylinder ( 6, 7 ) in such a way that the movement of the auxiliary gripping arm ( 3, 4 ) is initiated only when the piston of the first hydraulic cylinder reaches a predetermined position. |
