Shed forming device for a weaving machine

Shed forming device for a weaving machine comprising a number of motion systems consisting of a plurality of elements, each comprising,

• at least one carrier movable up and down by a driving element to position one or more warp threads in a shed, and
• transmission elements to transmit the motion of each driving element to a carrier,
• wherein each motion system comprises a first force element that is connected on the one hand to a carrier and on the other hand to a fixed point to exert a downward-directed first force on the carrier, and wherein each motion system comprises a second force element and an energy buffer, wherein the first force exerted by the first force element brings about the build-up of a supply of energy in the energy buffer by deformation or displacement of at least one part of an element of the motion system, that each motion system comprises a stopper to prevent the displacement or deformation caused by the first force from exceeding a predetermined maximum, that the second force element is provided to transform the energy stored in the energy buffer into a tensioning force that is exerted on an element of the motion system and results in an upward-directed second force on the carrier, wherein at least one part of the latter element is so deformable or displaceable under the influence of the tensioning force that the elements of the motion system are kept under tension.