SEPARATE-TYPE FIRE DOOR CLOSING APPARATUS FOR A DOOR CHECK

Title:

SEPARATE-TYPE FIRE DOOR CLOSING APPARATUS FOR A DOOR CHECK

Document Type and Number:

WIPO Patent Application WO/2010/062025

Kind Code:

A1

Abstract:

The present invention relates to a separate-type fire door closing apparatus for a door check, which operates in connection with the door check and is not integrally installed on the door check but rather installed separately from the door check to enable easy manufacture and installation. The separate-type fire door closing apparatus of the present invention has a sensing means for easy control. The separate-type fire door closing apparatus has a movable nut which moves forwards along with a screw rod to make the space between the movable nut and a chassis narrow, thus increasing the elastic force of a spring and enabling a rotary disk to prevent the chassis from rotating. On the contrary, when the movable nut moves backwards to make the elastic force of the spring weaker than the elastic force of a door check spring, the door check spring pushes a piston to close a fire door.

Inventors:

MOON HONG SIK (KR)

Application Number:

PCT/KR2009/004992

Publication Date:

June 03, 2010

Filing Date:

September 04, 2009

Export Citation:

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Assignee:

MOON HONG SIK (KR)

International Classes:

E05F3/00

Foreign References:

KR200331691Y1	2003-11-01
KR20080093363A	2008-10-21
KR100823138B1	2008-04-21
KR20040034308A	2004-04-28
JP2005016128A	2005-01-20