| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a fire prevention duct shutter which can be quickly and easily attached to a duct. <P>SOLUTION: This shutter to shut a duct 30 upon a fire and is provided with a housing 11 and a storage part 17 formed to store a duct 30. A cutting and shutting element 20 enabled to move from the housing 11 to the storage part 17 so as to cut in the duct 30 upon a fire by a drive means 28 is set in the housing 11, In the housing 11, the opposite side to the cutting and shutting element 20 in the duct shutter 10 having a fixing part 29 for fixing by a fixing element is opened and at least one stopper part 15 is set. At least one counter stopper part 25 to move linked to the stopper part 15 is set in the cutting and shutting part 20 so as to define a shutting position 42 of the cutting and shutting element 20. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
