JPH024689Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a damper blade locking device for closing air supply holes, exhaust holes, etc. provided in a house or the like in the event of a fire.

In order to keep the indoor air fresh at all times, it is common for kitchens and other areas that have combustion equipment such as gas ranges to have exhaust holes or air supply holes with windows in the outside wall that communicate the outdoors and indoors. There is a damper blade for fire prevention that opens and closes the window hole, and the damper blade is usually locked with the window hole open, and the window hole is closed in the event of a fire. Providing a locking device for closing the door is advantageous in terms of preventing the spread of fire.

However, conventional damper blade locking devices have a problem in that there are few highly reliable mechanisms for releasing the locking of the damper blade in the event of a fire. Also,
Recently, electrically operated locking devices have been seen, but electrically operated devices have problems with reliability of operation in emergencies, such as corrosion within the electrical circuit and uncertainty of the power supply in the event of a fire. There are problems with sexuality.

This idea was made based on the above background, and by locking the damper blade to the receiving metal with a fuse mechanism consisting of a pair of clamping metal fittings connected by a fuse body, the damper blade can be securely held in the event of a fire. The purpose of the present invention is to provide a damper blade locking device that can be activated to prevent the spread of fire.

This invention will be explained below with reference to the drawings.

Figures 1 to 5 show an embodiment of the damper blade locking device of this invention. Reference numeral 11 denotes an outer wall, and a window hole 12 is formed in this outer wall 11 to connect the indoor and outdoor areas. ing. A frame 1 surrounding the opening of the window hole 12 is provided on the outer surface 11a of the outer wall 11.
3 is attached to the frame 13, and a box-shaped hood 14 is attached to the mounting surface 1 formed by the back surface (right side in FIG. 1) of the hood 14.
4a is attached to the frame 13 in close contact with screws 15. The hood 14 includes a communication hole 14b formed on the mounting surface 14a and communicating with the window hole 12, an air intake port 14c formed on the bottom surface of the hood 14, and an insect repellent material such as punched metal attached to the air intake port 14c. It is mainly composed of a mesh body 14d.

A flat damper blade 17 is mounted inside the hood 14 so as to be able to rotate up and down around a hinge 16 to freely close the communication hole 14b.
This damper blade 17 is locked in the hood 14 with the communication hole 14b open, and when the temperature inside the hood 14 rises due to a fire or the like, it separates and releases the lock of the damper blade 17 to open the window hole 12. A fuse mechanism c for closing is provided, and a locking fitting 18 is provided for locking the damper blade 17, which has been released from the lock by the fuse mechanism c and moved to the communication hole 14b, in the closed state of the communication hole 14b. .

The fuse mechanism c has a bent metal fitting 19.
A and 19B form a clamping part 19a and are joined together by a fuse body 20, and the clamping fittings 19A and 19B are brought into contact with their respective bending directions aligned, and one of the clamping fittings 19A is Contact side tip 19
The tip 19c of the other clamping metal fitting 19B protruding forward from b is bent toward the tip 19b side of the one clamping metal fitting 19A, and the pinching metal fitting 1
A through hole 21 passes through each contact portion of 9A and 19B.
is formed, while a fuse body 20 such as a temperature fuse that melts at a constant temperature flows into and solidifies the through hole 21, its surroundings, and the tip portion 19c.

Then, a protrusion 17b such as a dove formed on the lower surface of the movable end 17a of the damper blade 17 is inserted into the insertion hole 19d formed in the other clamping fitting 19B, and the movable end 17a and the hood 14 are inserted into the insertion hole 19d. While inserting the receiving metal 22 attached to the upper surface of the inside into the clamping part 19a, the side of the clamping metal fittings 19A, 19B connected to the fuse body 20 is positioned closer to the window hole 12 than the extended surface of the damper blade 17. The fuse mechanism c is provided by locking the damper blade 17 to the receiver 22. In other words, the clamping fittings 19A and 19B are designed to separate when the ambient temperature rises and the fuse body 20 melts.

23 is a finishing material for stucco finishing applied to the outer surface 11a of the outer wall 11, and 24 is the hood 1.
A caulking material is filled between the outer peripheral edge of the back side of 4 and the outer wall 11 and the finishing material 23, 25 is a water drain hole formed on the mounting surface, and 26 is formed on the bottom surface of the hood 14 around the net 14d. This is a drain hole.

Next, the operation of the locking device according to the invention constructed as described above will be explained.

Normally, the damper blade 17 is fixed to the receiver 22 by a fuse device c. When the temperature around the fuse device c rises due to a fire or the like, the fuse body 20 melts and the damper blade 17
rotates to the right (toward the window hole 12) due to its own weight, as shown in FIG. 5, and the clamps 19A and 19B separate and fall. Subsequently, the damper blade 17 covers the communication hole 14b and closes the window hole 12, as shown by the two-dot chain line in FIG. At this time, the damper blade 17 is locked by the locking fitting 18 with the window hole 12 closed. As described above, the window hole 12 is closed and the spread of fire is prevented.

Note that when a fire occurs indoors, hot air from the fire escapes through the window hole 12 and the hood 14 for a short time, but at this time, the fuse body 20 is located closer to the window hole 12 than the extended surface of the damper blade 17. That is, since it protrudes into the hot air passage space in the hood 14, hot air tends to blow against the fuse body 20. Therefore, as the temperature rises in the room due to a fire outbreak, the fuse body 20 quickly melts and the damper blade 17 is activated. In addition, in the event of a fire, the window hole 12
When air moves from the room to the room, the fuse body 20 is melted by radiant heat from the room, and the damper blade 17 is activated in the same manner as described above.

The bent tip 19c of the other clamping metal fitting 19B prevents the melted fuse body 20 from flowing down when the fuse body 20 is poured into the through hole 21 and its surroundings, and also prevents the melted fuse body 20 from flowing down when the fuse body 20 is poured into the through hole 21 and its surroundings.
The bent portion has a positioning function in which it comes into contact with one of the clamping metal fittings 19A to determine the interval between the clamping parts 19a.

Note that in the above embodiment, the damper blade 1
7 is simply rotatably attached to the hood 14 by means of a hinge 16.
A spring (not shown) that biases the damper blade 17 toward the window hole 12 is attached to this hinge 16, and the damper blade 17 is attached to the hinge 16.
It is also possible to adopt a configuration in which the rotation is mainly performed by the spring. Furthermore, it is desirable to select a fuse body 20 having a melting point of around 70°C.

As explained above, the locking device of this invention has a structure in which the damper blade is locked to the receiver using a fuse mechanism formed by forming a clamping part and connecting a pair of clamping metal fittings with a fuse body. In the event of a fire, the fuse body melts and the damper blade operates reliably to close the window hole, thereby preventing the fire from spreading through the window hole. In addition, the locking device of this invention has a simple overall configuration and requires only a small number of parts.
It has the advantage of reliable operation even after a long period of time after installation.

In particular, since the protrusion formed on the movable end of the damper blade is configured to be inserted into the insertion hole formed on the other piece of one of the clamping fittings, the accuracy of the spacing between the clamping parts can be increased more than necessary. The support plate and the damper blade can be integrated without increasing the height, the fuse mechanism will not fall off due to unexpected vibrations, and moreover, it can operate reliably at the desired time.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the damper blade locking device according to this invention, Fig. 2 is a partially cutaway front view of the same example, and Fig. 3 is a partially cutaway view of the same example. The bottom view and FIG. 4 are enlarged sectional views of the fuse mechanism of the same example, and FIG. 5 is an explanatory diagram showing the same mechanism in a separated state. 14...Hood, 17...Damper blade, 17a
...Movable end, 17b...Protrusion, c...Fuse mechanism, 19A...Pinch fitting, 19B...Pinch fitting, 19a...Pinch portion, 19d...Insertion hole, 20
...Fuse type, 22...Receipt.

Claims (1)

[Scope of utility model registration request] A receiver 22 attached to the inner surface of the hood 14
In the damper blade locking device, the tip of the rotatable damper blade 17 and the movable end of the rotatable damper blade 17 are inserted into a clamping portion 19a formed in the fuse mechanism c to integrate them. c.
consists of two clamping metal fittings 19A and 19B in which one piece and the other piece are formed into an angular shape, one piece of which is overlapped and joined together by a fuse body 20, and the other pieces are spaced apart from each other. A clamping part 19a is formed, and a protrusion 17b formed at the movable end of the damper blade 17 is connected to one clamping fitting 19B.
A damper blade locking device that is inserted into an insertion hole 19d formed in the other piece.