Title:
BRAKE DEVICE OF ELEVATOR
Document Type and Number:
WIPO Patent Application WO/2004/039717
Kind Code:
A1
Abstract:
A brake device of an elevator capable of applying a brake to the brake wheel (1) of the elevator by moving forward brake shoes (5) by brake springs (6) and releasing the brake by moving backward the brake shoes (5) by attracting movable cores (10) by electromagnets (11), comprising exciting elastic bodies (14) resisting attraction forces by reactions with an increasing rate larger than that of the attraction forces of the electromagnets (11) due to a reduction in clearance, wherein when the braking is released, the electromagnets (11) gradually attracts the movable cores (10) according to the gradual increase of an exciting current while keeping a balance, midway during the releasing, with comprehensive reactions by the excited exciting elastic bodies (14) and the brake springs (6) to reduce impact sound by attraction, and when the braking is applied, the movable cores (10) gradually move forward according to the gradual decrease of the exciting current until an exciting point to reduce impact sound given when the brake shoes (5) abut on the brake wheel (1).
Inventors:
OKADA KOJI
Application Number:
PCT/JP2002/011196
Publication Date:
May 13, 2004
Filing Date:
October 29, 2002
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
B66B1/32; B66B11/04; B66B11/08; B66D5/08; B66D5/30; F16D51/10; F16D65/14; F16D65/22; (IPC1-7): B66B11/08; B66B1/32; F16D51/10; F16D65/27
Foreign References:
| JPH0873143A | 1996-03-19 | |||
| JP2000110868A | 2000-04-18 | |||
| JP2000065100A | 2000-03-03 | |||
| JPH04333487A | 1992-11-20 | |||
| JPS5794722U | 1982-06-10 | |||
| JPS5461979U | 1979-04-28 | |||
| JPS4528954B1 | ||||
| JP2003002568A | 2003-01-08 |
Other References:
See also references of EP 1557392A4
Attorney, Agent or Firm:
Takada, Mamoru (Kuzuno Takahashi & Tanida, 5th Floor,
Intec 88 Bldg., 20, Araki-ch, Shinjuku-ku Tokyo, JP)
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