JPH0325081Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a fire damper device for duct ventilation.

BACKGROUND ART Conventionally, this type of fire damper device has been made of metal due to its intended use, and rusting due to water such as rain or condensation has been seen as a problem. The structure is shown in Fig. 3. In the figure, 1 is a cylinder having an opening on the indoor side and an outdoor side, and this is placed on the indoor side so that one end protrudes to the outdoor side, and a flange 2 for mounting is attached to the outer periphery. is fixed. 3 is a damper supported on the cylinder 1 by a horizontal shaft 4, and 5 is a weight fixed to the damper 3. A temperature fuse 6 has one end fixed to the cylinder 1 and the other end fixed to the damper 3, and supports the damper 3 substantially horizontally. Reference numeral 7 denotes a flange provided on the inner surface of the cylinder 1, which is brought into contact with the damper 3 to close the gap between the damper 3 and the cylinder 1 when a fire occurs.

Problems to be Solved by the Invention In such a conventional configuration, water from rain or condensation accumulates inside the cylinder 1, which tends to cause rust, resulting in a decrease in durability and a decrease in the ability to prevent the spread of fire in the event of a fire. The point was hot.

This invention solves these problems,
It is an object of the present invention to provide a fire prevention damper device which prevents water from accumulating in the fire prevention damper device and enhances its antirust ability without reducing its performance as a fire prevention damper device.

Means for Solving the Problem In order to solve this problem, the present invention includes a cylinder having openings on the indoor side and the outdoor side, a mounting flange provided on the outer periphery of the cylinder, and a mounting flange provided inside the cylinder. and a damper provided via a temperature fuse,
The cylinder is provided with a groove along the axial direction at the bottom.

Function: With this configuration, water that has entered the inside of the cylinder due to wind and rain, or water droplets due to condensation, travels along the inner surface of the cylinder, reaches the groove at the bottom of the cylinder, flows through the groove, and is discharged to the outside of the cylinder.

Embodiment Hereinafter, the drawings (first
This will be explained based on FIG. 2). In the drawings, the same reference numerals as those in the conventional example indicate the same members, and detailed explanation thereof will be omitted.

In the figure, a cylinder 1 is placed indoors, connects a duct 8, and has a groove 1a projecting outward and extending in the axial direction at the bottom of the cylinder 1. This groove 1
a is not blocked by the flange 7 provided inside the cylinder 1, and is blocked by the convex portion 3a of the damper 3, which closes when a fire occurs.

The other configurations are the same as the conventional example shown in FIG.

In the above configuration, by installing the cylinder 1 at an angle so that the outdoor side is slightly lower than the indoor side, water that has entered the cylinder 1 or attached to the inner surface of the cylinder 1 is transmitted through the inner surface of the cylinder 1 into the groove 1a. After entering the interior, it flows through the groove 1a and is discharged outdoors.

Effects of the invention As described above, according to the invention, by providing a groove in the axial direction of the cylinder and discharging the water inside to the outside, the rust prevention ability is increased without reducing the ability to prevent the spread of fire, and the durability and The effect of improving reliability can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a fire damper device according to an embodiment of the present invention, and FIG. 2 is a sectional view showing the same installed state.
FIG. 3 is a perspective view of a conventional fire damper device. 1...Cylinder, 1a...Groove, 2...Flange, 3
...damper, 6...temperature fuse, 7...flange.

Claims (1)

[Scope of utility model registration request] The cylinder has an opening on the indoor side and the outdoor side, a mounting flange provided on the outer periphery of this cylinder, and a damper provided inside the cylinder via a temperature fuse, and the cylinder has a shaft at the bottom. A fire damper device with grooves along the direction.