OBSTACLE DETECTOR OF ELECTRIC SHUTTER AND ELECTRIC SHUTTER EQUIPPED WITH OBSTACLE DETECTOR

WIPO Patent Application WO/2007/142080

A1

[PROBLEMS] To provide an obstacle detector of an electric shutter exhibiting high sensitivity and high operation reliability and not permitting blow-through of flame from one side to the other side of the shutter upon occurrence of a fire, and to provide an electric shutter equipped with such an obstacle detector. [MEANS FOR SOLVING PROBLEMS] The obstacle detector comprises a flexible edge member (24) fixed to the bottom edge of a shutter curtain (12) and extending substantially over the entire length thereof. In the vicinity of one end of the edge member, a laser beam projector (34) projecting a laser beam in the longitudinal direction of the edge member through a hollow space (30) defined by the edge member is arranged, and a photosensor (40) for receiving that laser beam is arranged in the vicinity of the other end of the edge member. When the edge member is deformed elastically by external force and crushed, the laser beam is intercepted by the edge member and prevented from entering the photosensor. The edge member is made of a flame retardant elastomer material.

JP6060120	Bottom object rise-and-fall device of Hanging
JP4502482	Open / close control device
JP5005217	Seat shutter device

TAKAHASHI ICHIRO (JP)
YAMADA HIROMICHI (JP)
SEYSEN MANFRED (DE)

PCT/JP2007/060902

December 13, 2007

May 29, 2007

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FUJITA CORP (JP)
EFAFLEX JAPAN K K (JP)
TAKAHASHI ICHIRO (JP)
YAMADA HIROMICHI (JP)
SEYSEN MANFRED (DE)

E06B9/84; E06B9/17

JPS6214644U	1987-01-28
JP2004190322A	2004-07-08
JPH084451A	1996-01-09
JPS6168809A	1986-04-09
JPS63302398A	1988-12-09
JPH11173034A	1999-06-29

NODA, Shigeru (Yamamoto Bldg.2, Kagurazaka 4-chome,Shinjuku-ku, Tokyo 25, JP)

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