Patent ID: 9605475
Date: 2017-03-28
CPC Classifications: E04F,E06B,F16H

Claim:
1. Nut stacking mechanism for the displacement of slats between a stacking zone and a sliding zone, comprising: a rotatable spindle having an external screw thread with pitch P at least one movable nut per said displaceable slat, having an internal screw thread with pitch P at least one rotation stop element, which is designed to act in the sliding zone on the movable nut to form, viewed only in the rotational direction of the spindle, an obstacle for the movement of the nut to prevent absolute rotation of the nut about the spindle and allow movement of the nut, viewed in the longitudinal direction of the spindle; at least one stacking element, which is designed to act in the stacking zone on the movable nut to form, viewed only in the longitudinal direction of the spindle, an obstacle for the movement of the nut in order to limit movement of the nut, viewed in the longitudinal direction of the spindle, and allow absolute rotation of the nut about the spindle; wherein at least a part of the rotation stop element is arranged displaceably, viewed in the longitudinal direction of the spindle, and wherein the stacking element is arranged displaceably to provide, by displacement of at least a part of the rotation stop element and the stacking element, the boundary between the stacking zone and the sliding zone displaceably in the longitudinal direction of the spindle.