Procedure and apparatus for triggering the safety gear of an elevator
AssigneeKone Corporation
InventorFranz J. Karner
Life of this patent
Estimating the term…
Abstract
In this overspeed governor, an overspeed condition causes, by way of coupling elements (15,15'), a brake (5) comprised in the overspeed governor to engage a rope pulley (3) which, due to friction, brakes the rope driving the rope pulley itself and thus triggers the safety gear of the elevator. In the invention, the rotation of at least one coupling element (15,15') provided in the overspeed governor and rotating with it is braked by a frictional force which is applied to a braking point (31,32) on the coupling element (15,15'). The combined effect of the braking action and the rotation of the overspeed governor turns the coupling element (15,15') into a position in which the brake (5) is activated so as to engage the rope pulley (3).
Claims20
A procedure for triggering a safety gear of an elevator at a speed lower than a gripping speed of the elevator using an overspeed governor, the overspeed governor having coupling elements for causing an overspeed condition wherein a brake of the overspeed governor engages a rope pulley and due to friction brakes a rope driving the rope pulley, at least one coupling element having a braking point being provided on the overspeed governor, the at least one coupling element being rotatable with the overspeed governor, the procedure comprising the steps of:
- rotating the braking point with the at least one coupling element as the overspeed governor rotates;
- frictionally engaging an outer face of the braking point with a braking element, the outer face of the braking point facing the braking element;
- and
- turning the at least one coupling element upon subsequent rotation of the overspeed governor after the step of frictionally engaging to thereby move the coupling element to a position to activate the brake to engage the rope pulley.
Apparatus for triggering a safety gear of an elevator at a speed lower than a gripping speed of the elevator using an overspeed governor, the overspeed governor having coupling elements for causing an overspeed condition wherein a brake of the overspeed governor engages a rope pulley and due to friction brakes a rope driving the rope pulley, the apparatus comprising:
- a braking point on at least one coupling element of the overspeed governor, the braking point being movable with the coupling elements and having an outer face;
- and
- a braking element for frictionally engaging the outer face of the braking point to brake motion of the braking point whereafter subsequent rotation of the overspeed governor turns the coupling element to a position to activate the brake to engage the rope pulley,
- the outer face of the braking point facing the braking element.
Dependencies are inferred from the claim text.