change motion according to the invention see fig1 comprises a bearing structure 30 which is provided with means 34 35 36 for the fixing which means are movable in the breadthwise direction on a fixed part of a weaving machine this bearing structure comprises in the operational position essentially a horizontal bearing plate 31 and a fixing section 32 which is situated virtually at right angles to the top surface of said bearing plate 31 two u shaped brackets 20 22 are fixed above one another on the fixing section 32 so that their legs extend horizontally above one another and above the top surface of the bearing plate 31 a space is provided between the two brackets 20 22 and between the bottom bracket 22 and the bearing plate 31 by leaving a vertical distance between them a shaft 19 21 is supported on bearings in each of the two brackets 20 22 which shaft extends virtually at right angles between the legs of each bracket 20 22 the two shafts 19 21 lie in line with each other in a direction which is virtually at right angles to the top surface of the bearing plate 31 two drop wires 1 2 3 4 are fixed above one another on each of these shafts 19 21 so that all drop wires 1 2 3 4 are fixed rotatably in planes situated above one.