Traction elevator

• US 6,712,183 B2
• Filed: 12/02/2002
• Issued: 03/30/2004
• Est. Priority Date: 03/12/1998
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Kobayashi, Hidehiko, Otsuka, Motoharu
• Primary Examiner(s): Lillis, Eileen D.
• Assistant Examiner(s): TRAN, THUY VAN
• Application Number:
  US10/307,467
• Publication Number:
  US 20030075389A1
• Time in Patent Office: 484 Days
• Field of Search: 187/254, 187/264, 187/266, 187/413, 187/414
• US Class Current: 187/266
• CPC Class Codes: B66B 7/068 Cable weight compensating devices

Abstract

An elevator has a rope connected at a first end thereof to a top of a car and at a second end thereof to a top of a counterweight and guided and driven by a sheave that is rotated by a motor. A compensating rope suspends between the car and the counterweight. The compensating rope has a curving portion, a first linear portion on the car side of the curving portion, and a second linear portion on the counterweight side of the curving portion for compensating an imbalance of weight between a portion of the rope on the car side of the sheave and a portion of the rope on the counterweight side of the sheave. A first guide is arranged to guide the first linear portion and the second linear portion, and a second guide is arranged below the first guide and positioned between lines extending from the first linear portion and the second linear portion for guiding the curving portion of the compensating rope. A frame is arranged in a pit of an elevator shaft for supporting the first guide and the second guide.

Claims

1. An elevator having a rope having a first end connected to a top of a car and a second end connected to a top of a counterweight, and the rope being guided by a sheave that is rotated by a motor, comprising:

a compensating rope suspended from said car to said counterweight, said compensating rope having a curving portion, a first linear portion on a car side of said curving portion and a second linear portion on a counterweight side of said curving portion;

a guide arranged to guide said first linear portion and said second linear portion, and comprising a rotatable member configured to direct movement of said compensating rope;

a plurality of bell-shaped guides attached to both an upper side and a lower side of said guide for guiding said compensating rope; and

a frame arranged in an elevator shaft for supporting said guide.

2. The elevator as recited in claim 1, wherein said rotatable member comprises:

a plurality of cylindrical rollers.

3. The elevator as recited in claim 2, wherein said plurality of cylindrical rollers comprise:

two pairs of cylindrical rollers arranged to mutually intersect and positioned one above the other.