Inclined vertical type stranding machine

Claim 1

A stranding machine for twisting wire elements and winding the twisted wire elements onto a bobbin, comprising a frame, upper and lower bearings connected to the frame, said upper and lower bearings being arranged coaxially in an imaginary line inclined at an angle from 10 to 60 degrees relative to the vertical line of the frame, a flyer having upper and lower hollow flyer shafts rotationally situated in the upper and lower bearings, and at least one flyer arm in the form of a bow for connecting the upper and lower flyer shafts, a floating mechanism having a floating frame freely rotationally supported by the upper and lower flyer shafts to be located substantially along the inclined imaginary line, means for rotationally supporting the bobbin situated on the floating frame, and first driving means for rotating the bobbin held by the bobbin supporting means, the wire elements to be twisted being conducted from outside through one of the upper and lower hollow flyer shafts and then extending to the other of the upper and lower hollow flyer shafts along the flyer arm and finally being connected to the bobbin on the floating mechanism by passing through the other of the upper and lower hollow flyer shafts, a second driving means situated on the frame for rotating the flyer relative to the frame and the floating mechanism, and a constant pitch control device including first measuring means for measuring the speed of the wire elements wound onto the bobbin, and second measuring means for counting the rate of revolution of the second driving means so that the twisting rate relative to a length of the wire elements is determined by controlling the rotational speed of the first and second driving means based on the values obtained by the first and second measuring means.