# US 9,751,726 B2 · Locking apparatus to prevent movement of an elevator car

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- Number: US 9,751,726 B2
- Document ID: US9751726B2
- Status: Granted
- Kind: B2
- Application number: 13/175,095
- Filed: 2011-07-01
- Published: 2011-12-01
- Granted: 2017-09-05
- Earliest claimed: 2009-01-12
- Assignees: Kone Corporation
- Applicants: Ari Ketonen; Jarmo Ahoniemi; Marko Malin
- Inventors: Ari Ketonen; Jarmo Ahoniemi; Marko Malin
- Web page: https://patentgrep.com/patent/US9751726B2

## CPC

- B66B 11/043: {actuated by rotating motor; Details, e.g. ventilation (roping on drum, sheave, winch or pulley B66B11/0065; power supply or control B66B1/28, H02P; motor construction H02K)}
- B66B 5/0043: {Devices enhancing safety during maintenance}
- B66B 5/0087: {Devices facilitating maintenance, repair or inspection tasks (devices incorporated in the buffer B66B5/288; railings on top of the car B66B11/0226)}
- B66B: ELEVATORS; ESCALATORS OR MOVING WALKWAYS ({apparatus for raising or lowering persons on theatrical stages or the like A63J5/12} ; funicular railbound systems with rigid ground-supported tracks and cable traction, e.g. cliff railways, B61B9/00; arrangements of ammunition handlers in vessels B63G3/00; hoists, lifts, or conveyors for loading or unloading in general B65G; braking or detent devices controlling normal movements of winding drums or barrels B66D; ship-lifting devices E02C; garages for many vehicles with mechanical means for lifting vehicles E04H6/12; hoists for feeding ammunition or projectiles to launching apparatus or to loading mechanisms F41A9/00)

## Abstract

An elevator and a locking apparatus for preventing rotational movement of the traction sheave of the elevator are provided. The elevator includes at least a hoisting machine provided with a traction sheave, a frame and at least one brake. A holding device is disposed in connection with the hoisting machine, which holding device is arranged to prevent rotational movement of the traction sheave.

## Claims

### Claim 1

A locking apparatus to limit movement of an elevator car, the locking apparatus comprising a base formed by a frame part and a holding device configured to limit movement of the elevator car, wherein the locking apparatus is disposed with respect to a hoisting machine such that the holding device of the locking apparatus is arranged to limit rotational movement of the traction sheave, wherein the holding device pivots about an axis that is perpendicular to a rotational axis of the traction sheave to meet a holding detent on the traction sheave, and wherein the base of the locking apparatus is fixed to the frame of the hoisting machine.

### Claim 2 (depends on 1)

The locking apparatus according to claim 1, wherein the holding device is arranged to meet the holding detent on the traction sheave, a flank of the traction sheave comprises additional holding detents, and the holding device is arranged to rest against the holding detent to limit the rotational movement of the traction sheave between the holding detent and one of the additional holding detents that is immediately adjacent to the holding detent.

### Claim 3 (depends on 2)

The locking apparatus according to claim 2, wherein the holding device is fixed to the base on the frame by means of a hinge.

### Claim 4 (depends on 1)

The locking apparatus according to claim 1, wherein the holding device is arranged to meet the holding detent on the traction sheave by turning around a hinge pin that extends along the axis about which the holding device pivots.

### Claim 5 (depends on 1)

The locking apparatus according to claim 1, wherein a detector is connected to the holding device for detecting the locking position of the holding device.

### Claim 6 (depends on 1)

The locking apparatus according to claim 1, wherein the holding device is fixed to the base on the frame by means of a hinge.

### Claim 7

A locking apparatus to limit movement of an elevator car, the locking apparatus comprising a base formed by a frame part and a holding device configured to limit movement of the elevator car, wherein the locking apparatus is disposed with respect to a hoisting machine such that the holding device of the locking apparatus is arranged to limit rotational movement of the traction sheave, wherein the holding device pivots about an axis that is perpendicular to a rotational axis of the traction sheave to meet a holding detent on the traction sheave, and wherein the holding device is fixed to the base on the frame by means of a hinge.

### Claim 8

A locking apparatus to limit movement of an elevator car, the locking apparatus comprising a base formed by a frame part and a holding device configured to limit movement of the elevator car, wherein the locking apparatus is disposed with respect to a hoisting machine such that the holding device of the locking apparatus is arranged to limit rotational movement of the traction sheave, wherein the holding device pivots about an axis that is perpendicular to a rotational axis of the traction sheave to meet a holding detent on the traction sheave, and wherein the base comprises a groove, into which the holding device is arranged to turn in a locking phase of the traction sheave.

### Claim 9

A locking apparatus to limit movement of an elevator car, the locking apparatus comprising a base formed by a frame part and a holding device configured to limit movement of the elevator car, wherein the locking apparatus is disposed with respect to a hoisting machine such that the holding device of the locking apparatus is arranged to limit rotational movement of the traction sheave, wherein the holding device pivots about an axis that is perpendicular to a rotational axis of the traction sheave to meet a holding detent on the traction sheave, and wherein the base comprises a locking device, which is arranged to prevent an exit of the holding device from a groove of the base.