Elevator safety device and elevator safety device mounting method

Patent metadata

Field	Value
Publication number	US-9598264-B2
Application number	US-201114345783-A
Country	US
Kind code	B2
Filing date	Dec 7, 2011
Priority date	Dec 7, 2011
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A safety device main body that is inserted inside a lower frame of a car frame includes a braking member. A guiding apparatus includes a guide shoe that is displaceable inside the safety device main body between a guided position that is guided by a guide rail and a retracted position that is removed from the guided position. The guide shoe is disposed in the guided position when the braking member is separated from the guide rail. An actuating apparatus displaces the guide shoe toward the retracted position while displacing the braking member in a direction of contact with the guide rail. The safety device main body, the guiding apparatus, and the actuating apparatus are supported together by a supporting body. The supporting body is mounted onto the lower frame from below using a mounting aperture that is previously disposed on the lower frame.

First claim

The invention claimed is:

1. An elevator safety device that is mounted onto a car, the car including a cage and a car frame that surrounds the cage, the car being movable along a guide rail, the elevator safety device comprising:
a safety device main body that includes a braking member, the braking member being movable between a first position where the braking member is in contact with the guide rail and a second position where the braking member is separate from the guide rail, the braking member being inserted inside a lower frame of the car frame so as to apply a braking force to the car by placing the braking member in contact with the guide rail;
a guiding apparatus that includes a guide shoe that is displaceable inside the safety device main body, the guide shoe being movable between a guided position where the guide shoe slidably engages the guide rail and a retracted position where the guide shoe is disengaged from the guide rail, the guide shoe being disposed in the guided position when the braking member is separated from the guide rail;
an actuating apparatus that mechanically couples the guide shoe and the braking member such that when the guide shoe is moved from the guided position toward the retracted position, the braking member is moved from the second position toward the first position; and
a supporting body that is mounted onto the lower frame using a mounting aperture on the lower frame so as to support the safety device main body, the guiding apparatus, and the actuating apparatus, the supporting body forming a cavity protruding from the lower frame in a direction away from the cage, and the cavity accommodating a portion of the safety device main body,
wherein the actuating apparatus comprises a pivoting shaft that is pivotably disposed on the supporting body in the cavity, and the actuating apparatus is configured to displace the guide shoe and the braking member in response to pivoting movement about the pivoting shaft.

2. The elevator safety device according to claim 1 , wherein the actuating apparatus further comprises:
a pivoting lever that is pivoted together with the pivoting shaft;
a seesaw body that is pivoted around an upper portion shaft in response to the pivoting of the pivoting lever, the upper portion shaft being disposed between the cage and the supporting body;
a safety interlocking link that is connected to the seesaw body so as to displace the braking member in response to the pivoting of the seesaw body; and
a guide shoe interlocking link that is connected to the seesaw body so as to displace the guide shoe in response to the pivoting of the seesaw body.

3. The elevator safety device according to claim 2 , wherein the supporting body comprises:
a pair of mounting portions that are mounted onto respective mounting surfaces of the lower frame so as to be separated from each other; and
a bearing portion that is disposed between the pair of mounting portions and protruding from the mounting portions along the direction away from the cage to form the cavity.

4. The elevator safety device according to claim 1 , wherein the actuating apparatus further comprises:
a pivoting lever that is pivoted together with the pivoting shaft;
a seesaw body that is pivoted around an upper portion shaft in response to the pivoting of the pivoting lever, the upper portion shaft being disposed between the cage and the supporting body;
a safety interlocking link that is connected to the seesaw body so as to displace the braking member in response to the pivoting of the seesaw body;
a pulley that is disposed on the seesaw body; and
a cord-like body that is wound around the pulley, and that suspends the guide shoe so as to displace the guide shoe in response to the pivoting of the seesaw body.

5. The elevator safety device according to claim 4 , wherein the supporting body comprises:
a pair of mounting portions that are mounted onto respective mounting surfaces of the lower frame so as to be separated from each other; and
a bearing portion that is disposed between the pair of mounting portions and protruding from the mounting portions along the direction away from the cage to form the cavity.

6. The elevator safety device according to claim 1 , wherein the supporting body comprises:
a pair of mounting portions that are mounted onto respective mounting surfaces of the lower frame so as to be separated from each other; and
a bearing portion that is disposed between the pair of mounting portions and protruding from the mounting portions along the direction away from the cage to form the cavity.

Assignees

• Mizuno Sachiomi
• Nakamura Hideki
• Mitsubishi Electric Corp

Inventors

• Mizuno Sachiomi
• Nakamura Hideki

Classifications

• B66B5/22

  by means of linearly-movable wedges (B66B5/24 takes precedence) · CPC title

• B66B5/18 Primary

  and applying frictional retarding forces · CPC title

• B66B7/04

  Riding means, e.g.} Shoes, Rollers, {between car and guiding means, e.g. rails, ropes (rollers adapted to match the shape of a special guiding means B66B7/02; vibration attenuation systems acting between car and its supporting frame B66B11/026) · CPC title