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1. (WO2018179211) PIT LADDER DEVICE FOR ELEVATOR

Pub. No.:    WO/2018/179211    International Application No.:    PCT/JP2017/013233
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Mar 31 01:59:59 CEST 2017
IPC: B66B 5/00
E06C 9/08
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: KAMADA, Hironobu
鎌田 紘暢
Title: PIT LADDER DEVICE FOR ELEVATOR
Abstract:
In the present invention, a displacement means capable of displacing a ladder to either a use position or a storage position is configured to be able to balance the ladder and a counter weight in a seesaw manner. Accordingly, the purpose of the present invention is to provide an elevator pit ladder device which enables performance, with a light load, of the operation of moving the ladder from the storage position to the use position and which enables the ladder to spontaneously move from the use position to the storage position without requiring an operator's involvement. The pit ladder device according to the present invention is characterized by being equipped with a displacement means which is provided to a fixing bracket fixed on a hoistway and which is capable of displacing a ladder to either a use position at which the ladder is used for service or a storage position at which the ladder not in use is stored in such a manner as not to interfere with the operation of the elevator, wherein: the displacement means is provided with a mounting arm which is pivotally supported in a seesaw manner; the ladder is mounted to one end of the mounting arm, while a counter weight is mounted to the other end; and the moment on the counter weight side is configured to be greater than the moment on the ladder side.