(57) A device in pile driving machines including a drop hammer (3) which drives down piles
into the ground.
The problem of preventing crushing and breaking damages to the piles is solved in
accordance with the invention in that the drop hammer (3) consists of two .or several
superposed weight segments (10) arranged, against the action of spring members (11),
to be drawn together as a result of their velocity energy when hitting the pile. The
velocity energy is adjustable by control of the bias of the spring members (11) with
the aid of connecting rods (14) passing through the weight segments (10).
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