Patent ID: 7841802

Claim:
A strand-like material laying device for immersing into the ground to form a subterranean trench while being moved in a longitudinal direction, said strand-like material laying device comprising: a first unit for cutting the ground to form said trench and guiding a strand-like material into said trench, said first unit having a plurality of first elements which are connected in series like a flexible chain and each of which has at its front end a cutting edge wherein the cutting edges of two successive ones of the plurality of first elements are offset with respect to each other in depth direction of the strand-like material laying device so that a cutting depth of the strand-like material laying device increases in a direction 180 degrees opposed to a direction of movement thereof, and wherein said two successive ones of the plurality of first elements are coupled with each other for pivotal movement relative to each other about an axis being substantially parallel to the depth direction of the strand-like material laying device.