JPS582356Y2 - Fire damper with grill - Google Patents

Description

[Detailed description of the invention] This invention relates to a fire damper that prevents rain, snow, etc. from blowing in.

Conventionally, grills to prevent rain, snow, etc. from blowing in were manufactured integrally with a cylindrical body and fitted into the outer end of the ventilation tube. It was difficult to install.

This invention is proposed in order to eliminate these difficulties and drawbacks of the conventional art.To explain one embodiment shown in the drawings, a flange portion 2 bent outward is provided at one end of the main body 1,
The flange 2 of the main body 1 is brought into contact with the flat part 5 around the shutter 3 of the grille 4, which is separately formed into a dish shape and has a ventilation shutter 3 punch-molded in the center, and both are connected by bolts 6. Or fix with rivets, etc.

A ring-shaped projecting edge 7 is provided on the inner surface of the main body 1, projecting inwardly, and the divided portions of the two halves 8, 8 of the damper are pivoted to a pivot shaft 9 in a hinge-like manner. The pivot shaft 9 is fixed close to the flange 7, and the damper pieces 8, 8 are brought into elastic contact with the flange 7 by a spring 10 to close the opening, and the upper ends of the damper pieces 8, 8 are The locking piece 12.12 is fixed to the damper, and both pieces 8, 8 of the damper are normally overlapped against the spring 10, and both pieces are joined to the locking piece 12.12 at a predetermined temperature. The bander is held by engaging a holder 11 which is separated into two pieces when the bander is melted.

Furthermore, by fixing a plurality of elastic protrusions 13 to the outer periphery of the main body 1, the fire damper with grill 4 can be easily fitted by simply fitting the cylindrical body of the main body 1 into the opening in the wall surface. Further, the peripheral edge 14 of the grill 4 is in close contact with the wall surface, and can prevent rain, snow, etc. from blowing in, and rain water, etc. from entering.

As described above, in this invention, a suitable grill 4 is fixed to the fire damper main body 1, and normally it functions as a vent, but if the temperature inside and outside rises due to a fire etc. and reaches a predetermined temperature, the damper The holder that holds both pieces of the pipe separates and the holding of both pieces is released, and the elasticity of the spring automatically closes the vent hole, blocking the intrusion of flames and smoke. , which exhibits extremely remarkable effects in practice.

[Brief explanation of the drawing]

The figures show one embodiment of this invention, with FIG. 1 being a front view and FIG. 2 being a longitudinal sectional view. Code explanation 1...Body, 2...Brim part,
3...Armor door, 4...Grill, 5.
...Flat part of the grill, 6...Bolt, 7
...Protrusion, 8 ...Both pieces of damper, 9
...Pivot, 10 ...Spring, 11
...Holder, 12...Locking piece, 13.
...Elastic protrusion, 14...Periphery of the grill.

Claims (1)

[Scope of utility model registration request] A flange 2 is provided protruding outward from one end of the main body 1, and a flat part 5 of a grill 4 having a ventilation shutter 3 provided in the center is brought into contact with the flange 2, and both are fixed with bolts 6 or the like. An annular projecting edge 7 is provided protrudingly on the inner surface of the main body 1, and a pivot 9 supporting the divided parts of both halves 8, 8 of the damper formed in two parts is fixed close to the projecting edge 7. , both pieces 8, 8 of the damper are connected to the spring 10
A fireproof damper with a grill, which is made to come into elastic contact with the flange 7, and is normally held by a holder 11 that polymerizes both pieces 8, 8 of the damper and decomposes them at a predetermined temperature.