Title:
STEP ROUTE STRUCTURE FOR CONTROLLING FOLDING AND UNFOLDING OF FOLDABLE STEPS
Document Type and Number:
WIPO Patent Application WO/2010/115317
Kind Code:
A1
Abstract:
A step route structure for controlling the folding and unfolding of foldable steps comprises a main wheel rail (1), an auxiliary wheel control rail (2), a folding control rail (3) and a stopper rail (4) that pushes a latch hook stopper (9a) in the direction of a releasing lock of a latch hook (8a). An inner lateral surface of the auxiliary wheel control rail (2) facing the foldable steps is provided with a rail groove (24) that is matched with an auxiliary wheel (2a) of the foldable steps. An inner lateral surface of the folding control rail (3) is provided with a control pin sliding groove (34) that is matched with a support arm control pin (7a) of the foldable steps. The stopper rail (4) is provided opposite to the latch hook stopper (9a) of the foldable steps. The structure can control the folding and unfolding of the foldable steps, and ensures the surfaces of the steps maintain a horizontal state as the steps fold and unfold. The structure has high load-bearing capacity, and is reliable, simple and easy to operate.
Inventors:
CHEN YE (CN)
YUAN HUASHAN (CN)
YUAN HUASHAN (CN)
Application Number:
PCT/CN2009/071920
Publication Date:
October 14, 2010
Filing Date:
May 22, 2009
Export Citation:
Assignee:
SUZHOU SHENLONG ELEVATOR CO LT (CN)
CHEN YE (CN)
YUAN HUASHAN (CN)
CHEN YE (CN)
YUAN HUASHAN (CN)
International Classes:
B66B23/14; B64F1/315
Foreign References:
CN101386345A | 2009-03-18 | |||
US6234295B1 | 2001-05-22 | |||
CN200978174Y | 2007-11-21 | |||
CN1545481A | 2004-11-10 | |||
CN101386347A | 2009-03-18 | |||
JP2000203780A | 2000-07-25 | |||
JP2000191259A | 2000-07-11 | |||
JP2006256825A | 2006-09-28 | |||
CN101423171A | 2009-05-06 |
Attorney, Agent or Firm:
SUZHOU CREATOR PATENT & TRADEMARK AGENCY LTD. (Guotao Commercial Building93# Ganjiang West Road, Pingjian, Suzhou Jiangsu 2, CN)
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