# US 7,607,518 B2 · Emergency brake of elevator

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 7,607,518 B2
- Document ID: US7607518B2
- Status: Granted
- Kind: B2
- Application number: 10/586,862
- Filed: 2004-10-05
- Published: 2007-07-26
- Granted: 2009-10-27
- Earliest claimed: 2004-10-05
- Assignees: Mitsubishi Electric Corporation
- Inventors: Kazumasa Ito
- Web page: https://patentgrep.com/patent/US7607518B2

## CPC

- B66D 5/30: electrical
- B66B 5/24: by acting on guide ropes or cables
- B66D 5/08: embodying blocks or shoes
- B66D: CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS (winding or unwinding ropes or cables for feeding or storage purposes B65H; rope or cable winding or unwinding mechanisms for lifts B66B)
- 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

According to an emergency brake device for an elevator, a brake body is capable of coming into and out of contact with an outer periphery of a sheave which is rotatable, and is capable of being displaced to a rotation direction of the sheave while maintaining a contact with the outer periphery of the sheave. Further, the brake body is arranged between the sheave and a gripper metal. The gripper metal includes an inclined portion which is caused to incline with respect to the outer periphery of the sheave. When the brake body is displaced in the rotation direction of the sheave, the brake body is meshed between the outer periphery of the sheave and the inclined portion. To the brake body, a connecting portion capable of being displaced with respect to the sheave is connected. The connecting body is displaced in a direction in which the brake body comes into and out of contact with the outer periphery of the sheave by a brake drive device.

## Claims

### Claim 1

An emergency brake device for an elevator comprising:
a connecting body capable of being displaced with respect to a sheave which is rotatable;
a brake body provided to the connecting body, which is capable of coming into and out of contact with an outer periphery of the sheave and capable of being displaced in a rotation direction of the sheave while maintaining a contact with the outer periphery of the sheave;
a brake drive device which displaces the connecting body in a direction in which the brake body comes into and out of contact with the outer periphery of the sheave; and
a gripper metal including an inclined portion caused to incline with respect to the outer periphery of the sheave wherein a space between the inclined portion and the outer periphery of the sheave becomes smaller with distance, the brake body being meshed between the outer periphery of the sheave and the inclined portion when the brake body is displaced in the rotation direction of the sheave,
wherein the brake body comes into contact with the inclined portion and with the outer periphery of the sheave and is meshed between the outer periphery of the sheave and the inclined portion when the brake body moves into the smaller space between the inclined portion and the outer periphery of the sheave, so that rotation of the sheave is braked.

### Claim 2 (depends on 1)

An emergency brake device for an elevator, according to claim 1 wherein the brake body is a brake roller configured to rotate around a pin attached to the connecting body.

### Claim 3 (depends on 2)

An emergency brake device for an elevator according to claim 2, further comprising a connecting body position returning device which biases the connecting body against the displacement of the brake body when the brake body is displaced in the rotation direction of the sheave.

### Claim 4 (depends on 1)

An emergency brake device for an elevator according to claim 1, further comprising a connecting body position returning device which biases the connecting body against the displacement of the brake body when the brake body is displaced in the rotation direction of the sheave.

### Claim 5 (depends on 1)

An emergency brake device for an elevator, according to claim 1 wherein a space between the inclined portion and the outer periphery of the sheave becomes smaller with distance from a centerline of the brake body in first and second rotating directions of the sheave.