Yarn take-up system for weaving and a method of weaving a reinforcing fiber structure for composite material parts

A method of fabricating at least one fiber structure by three-dimensional or multilayer weaving between a plurality of layers of warp yarns interlinked by weft yarns, the method comprising:

• clamping warp yarn layers by clamping a clamping device of a warp yarn take-up system, the clamping device being movable at least in a direction corresponding to an advance direction of the warp yarns, wherein the clamping device comprises a bottom clamp, a top clamp, and at least one intermediate clamping element present between the bottom clamp and the top clamp, and wherein the bottom clamp, the top clamp, and the at least one intermediate clamping element are held together by clamping,
• each intermediate clamping element being inserted between two adjacent layers of the plurality of warp yarn layers so as to separate a fraction of the warp yarn layers in the plurality of warp yarn layers from the remaining layers of the plurality of warp yarn layers in the clamping device;
• and
• weaving a first fiber structure upstream from the clamping device, said clamping device being moved in the advance direction of the warp yarns during the weaving.