of and simultaneous pivoting of the gripping and carrying plate 12 toward and away from a cross support 21 of the take up device as can be seen in fig2 the pivoting of the gripping and carrying plate 12 with respect to the cross support 21 is about a horizontal axis which is not stationary but which instead shifts in an upward or downward direction as pivoting movement of the gripping and carrying plate 12 occurs to this end two mutually spaced bearing plates 22 are fixed on the underside of the cross support 21 while in the interior of the gripping and carrying plate 12 reinforcement strips 23a fig1 or reinforcement walls 23b fig2 are firmly mounted in pairs spaced from each other each pair of such reinforcement strips 23a or reinforcement walls 23b forming by their mutual distance or separation an uptake and guiding space 24 for a cam piece or mechanism 25 secured on the cross support 21 above the bearing plate 22 at their lower ends the reinforcement strips 23a or reinforcement walls 23b have projections 26 while in their central regions sensing rollers 27 cooperating with the respective cams 25 are rotatably mounted extending between the bearing plates 22 fixed on the cross support 21 and the projections 26 of the reinforcement strips 23a or reinforcement walls 23b are articulated levers 28 which are pivotably mounted both at the bearing plates 22 and at the projections 26 in fulcrums 30a and 30b further there extends at least between one projection 26 and one bearing plate 22 a return spring 29 which in the illustrated example is a helical extension spring the way in which this return spring 29 is applied is such that in any.