JPH0453805Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a fire prevention damper device for a door.

[Conventional technology]

Conventional fire prevention damper devices for doors use a single damper with the same area as the louver, which is installed in an opening formed in the door body, directly above the louver, in order to open and close the opening of the louver. It was placed so that it could be raised and lowered.

[Problem that the invention attempts to solve]

Due to the above-mentioned configuration, the conventional door fire damper device has the following problems.

(b) A single damper with the same area as the louver was placed directly above the louver so that it could be moved up and down. As a result, the height of the louver is restricted and the ventilation function of the door louver is restricted. There were some restrictions.

(b) In order for the above-mentioned louver to provide sufficient ventilation, the storage area for the damper placed directly above the louver must be large and occupy as much as the window on the above side, making the protrusion of the damper storage area conspicuous and preventing the door from opening. In addition to impairing the design of the projector, people or objects could accidentally hit the protrusion.

This invention solves the problems of the above-mentioned conventional technology,
It is a damper device that maintains sufficient ventilation function through the louver at all times, and can close the louver in an emergency. It is an object of the present invention to provide a fire damper device having a compact size that does not require deterioration of the ventilation function, suppresses the protruding area and the protruding thickness, and does not impair the design.

[Means for solving problems]

In order to solve the above-mentioned problems of the prior art, this invention has a left and right guide frame fixed to one side of the opening formed in the door body, and is guided by the guide frame to be vertically slidable, so that the opening is always guided by the left and right guide frames. an upper damper plate and a lower damper that are held by a locking means in an overlapping manner in an upper position in which the opening is opened, and in an emergency, the holding state is released and the upper damper plate and the lower damper are moved downward in an elongated manner in conjunction to close the opening; The upper damper plate and the lower damper plate each have engaging pieces protruding from the upper and lower ends of the flat plate that are fitted together in a facing manner, so that when the plate is extended, A fire prevention damper device for a door, characterized in that the engaging pieces are formed so as to be able to engage with each other, and a deterrent body is provided at a mid-height position of the guide frame to prevent passage of only the upper damper plate. That is.

[Effect]

The fire prevention damper device for a door with the above structure overlaps two damper plates that open and close the opening of the door body so that the engagement pieces at the upper and lower ends can touch each other vertically, and expand and contract in conjunction with each other. In normal times when there is no occurrence of fire or the like, the damper plate is reduced to half its length when extended and stored within a storage area that is approximately the thickness of one damper plate. . Therefore, in the case of the above-mentioned damper having an opening provided with a louver, the height of the opening is lower than that of a conventional one-piece damper. Not only can ventilation be achieved, but also the protrusion of the damper storage area can be suppressed. Next, in the event of an emergency such as a fire,
When the locking means is released, the damper plate, which had been previously arranged in a reduced manner in the upper part of the guide frame by the locking means, lowers under its own weight and is placed at a mid-height position in the guide frame. At the position of the suppressor, it expands from its previously reduced state to the same area as the louver, so the expanded damper plate can easily and quickly close the entire opening of the louver, preventing hot air, flames, smoke, etc. from passing through. can be reliably blocked.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

First, to explain the configuration, as shown in Figure 1,
A glass window 9 is formed on the upper side of the door 1, an opening is formed on the lower side, and a louver 2 is formed in this opening.
is sorbed. The surface on one side of this door 1 and the peripheral surface on the one opening side of this louver 2 through which air flows upward in the louver 2 are the large area of the louver 2 and the side of the louver 2. A guide frame 3 is attached at a position directly above the louver 2, and is formed to accommodate a storage area sufficient to accommodate a section damper A, which will be described later, in a reduced form for opening and closing the opening of the louver 2.
The guide frame 3 has a U-shaped cross section as shown in FIGS. 2 to 4, and has vertical grooves 3a on both sides thereof. And this vertical groove 3a
At the mid-height position in the
When the damper A descends within the frame under its own weight, only the upper damper 4 of this damper A is stopped at this position, and the lower damper 5 is a guide that acts as a deterrent with a downward arcuate piece formed so as to pass through this position. A stopper 3b is provided.

Inside the guide frame 3, a damper A shown below is housed in upper and lower sections and is movable up and down. That is, as shown in FIGS. 2 to 4, this section damper A has an upper damper 3.
and a lower damper 5, which are formed into a set of two. First, the upper damper 4 has a bent metal plate, and an engaging piece 4a protruding from the upper end of the surface part is bent outward at a right angle and comes into contact with the upper limit of the slide frame 3 in parallel when the section damper A is contracted. is forming. In addition, at the lower end of the surface part there is a lower damper 5 to be described later.
An upward hook-shaped engaging piece 4b is formed to protrude outward in order to interlock with the holder. The surface between the engaging piece 4a and the engaging piece 4b is the guide frame 3.
It has a width that allows it to pass through the longitudinal grooves 3a on both sides of the frame, and a width that allows it to shield the upper half of the adjacent louver 2 when it descends due to its own weight from the top of the frame and comes into contact with the guide stopper 3b. It is formed to have a sufficient length and a large area.

The lower damper 5 assembled with the upper damper 4 is
With the bending of the metal plate, at the upper end of the surface part there is an upper damper 4 which descends from the highest level within the frame due to its own weight,
Even if the upper damper 4 stops descending by coming into contact with the guide stopper 3b, it continues to descend stably independently and then can be easily locked to the engagement piece 4b of the upper damper 4 that has stopped as described above. A downward hook-shaped engaging piece 5a is formed to protrude inward. In addition, at the lower end of the surface part, there is an engaging piece 5b bent inward at a right angle, which allows it to rise together with the upper damper 4 when the section damper A is placed in the uppermost position in the guide frame 3 in a contracted manner. It is formed in a protruding manner. The engaging piece 5a and the engaging piece 5
The surface part b has a width that allows it to pass through the vertical grooves 3a on both sides of the guide frame 3a, and a width that allows it to pass through the vertical grooves 3a on both sides of the guide frame 3a.
It has a large area and is long enough to cover the lower half of the screen.

Further, the upper damper 4 and the lower damper 5 that are combined to move up and down within the guide frame 3 are connected to the engaging piece 4b of the engaging piece 4a of the upper damper 4 formed in a protruding manner and the engaging piece 4b of the lower damper 5 formed in a protruding manner in the same way. Joining piece 5a
and the engaging pieces 5b are fitted together in a facing manner so that the engaging pieces can engage with each other and interlock with each other, and the width dimension of the vertical groove 3a of the guide frame 3 is one piece The thickness is kept close to that of a damper plate.

Note that both ends of the engagement piece 5b of the lower damper 5 are
When the sectional damper A is arranged in a contracted manner at the top of the guide frame 3 or lowered by its own weight, the lower damper 5 does not come into contact with the guide stopper 3b provided at an intermediate height position. This is reduced to form an air space-like cutout 5c.

2 of the above upper damper 4 and lower damper 5
The sectional damper A, which is made up of one set of dampers, is set in the following reduced state in preparation for the occurrence of a fire or the like. That is, as shown in FIG. 2, in normal times when there is no fire or the like, the lower damper 5 is lifted upward and the engaging piece 5b of the lower damper 5 is inserted into the guide stopper 3b so that the entire area of the louver 2 can be ventilated. After reducing the segmented damper A, which had been extended to a full length state, to a half length state by bringing it into contact with the engagement piece 4b of the upper damper 4 that is stopped at the position, the segmented damper A according to this embodiment is The temperature fuse 8, which serves as a locking means between the mounting base 6 welded to the upper vertical surface of the guide frame 3 and the same mounting base 7 welded to the lower vertical surface of the lower damper 5, is attached to the inside of the guide frame 3. It is arranged in a storage manner at the top.

The temperature fuse 8 is an adhesive that melts at a certain temperature (temperature within a specified range due to hot air, flames, etc. at the time of a fire outbreak) between the surfaces of two metal pieces 8a and 8b of the same shape arranged oppositely. It is made by coating.

In the fire prevention damper device for a door having the above-mentioned configuration, a divisional damper A consisting of an upper damper 4 and a lower damper 5 formed to open and close the opening of the louver 2 is arranged so that both ends (the engaging piece 4b ，
5b or the engagement piece 4b and the engagement piece 5a), the damper A can be expanded and contracted in an interlocking manner by contacting the engagement piece 5b or the engagement piece 4b and the engagement piece 5a). 3, the damper plate can be set in a state where the two damper plates are placed facing each other on the uppermost side, so that the thickness is almost the same as that of a single damper plate, and the length is reduced to half of the length when the damper plate is extended. Therefore, the height of the entire damper device including the louver 2, the guide frame 3, and the segmented damper A, which are constructed at the opening of the door 1, is lower than when a conventional single-piece damper is used. The thickness remains almost the same. This eliminates the need to change the area of the louver 2, and since the protrusion of the damper device is suppressed, sufficient ventilation can be achieved. There is no danger of people or objects getting caught or hitting the device, and it is also effective because the opening angle of the door is limited because the protruding damper device comes into contact with an adjacent or nearby wall or object. The opening is not suppressed.

Next, when a fire occurs on either side of the door 1, the hot air and flames from the position of the louver 2 will pass through the opening and move to the opposite side of the door 1. The temperature fuse 8 fixed between the upper vertical surface of the guide frame 3 and the lower vertical surface of the lower damper 5 is quickly blown out by the flame. Therefore, the sectional damper A, which until then had been arranged in a reduced manner in the upper part of the guide frame 3 with the temperature fuse 8 fixed thereto, now has the upper damper 4 and the lower damper 5 separated by the melting of the temperature fuse 8. will start descending due to its own weight. At this time, the upper damper 4 is prevented from descending and stopped by the contact of the engagement piece 4b at the position of the guide stopper 3b provided in the vertical groove 3a of the guide frame 3, but the lower damper 5 is stopped by the engagement piece 4b. Since both sides of the piece 5b are removed by the notches 5c, the lowering can be continued without being blocked by the guide stopper 3b. And this lower damper 5 is
When the engaging piece 5b comes into contact with the lower limit of the guide frame 3, its descent stops, and as a result, the divisional damper A formed by the upper damper 4 and the lower damper 5 is reduced before it descends. At this point, it has expanded to the same area as the louver 2, so the extended section damper A can easily and quickly close the entire opening of the louver 2, preventing the hot air caused by the fire, etc. To reliably block the passage of flames, smoke, etc., and easily and reliably prevent a building from catching fire or spreading fire.

In the above embodiment, the guide frame 3 for setting the temperature fuse 8 was attached to the one opening side through which ventilation flows in the louver 2 in an upward direction. Without limitation, for example, even if it is installed on the other opening side on the opposite side where ventilation flows downward, there will be no major change in the passage of hot air or flames in the event of a fire, so it will have the same effect as the above-mentioned embodiment. It is effective.

[Effect of idea]

In this invention, the damper plate that opens and closes the opening of the louver is formed into a retractable damper with a pair of upper damper plates and a lower damper plate, instead of a single piece like in the past. The damper plate and the lower damper plate are combined so that the engaging pieces touch and engage with each other, so even when installing a window glass on a door, it can be smoothly and easily installed without changing the area of the louver. In addition, the height of the damper device and its protrusion from the door surface are suppressed, so the design is not compromised and there is no risk of people or objects getting caught or hit by the protruding damper device. Furthermore, the effective opening is not narrowed due to the damper device protruding when the door is opened coming into contact with an adjacent wall or the like.

[Brief explanation of the drawing]

Figure 1 is a front view of the door according to this invention, Figure 2 is a perspective view of the fire prevention damper device with the main parts of the guide frame and division damper partially cut away, and Figure 3 is a diagram showing how to prevent a fire from occurring in the fire prevention damper device. FIG. 4 is a longitudinal side view of the main part showing the open state, and FIG. 4 is a longitudinal side view of the main part showing the closed state at the time of the fire outbreak. 1...Door, 2...Gallery, 3...Guide frame, 3
a...Vertical groove, 3b...Guide stopper (deterrent plate), 4...Upper damper, 5...Lower damper,
8...Temperature fuse (locking means), A...Division damper.

Claims (1)

[Scope of utility model registration request] The left and right guide frames are fixed to one side of the opening formed in the door body and have absorbed the debris, and the guide frames are vertically slidingly guided, and are normally placed in an overlapping position in the upper position to keep the opening open. The damper plate is comprised of two damper plates, an upper damper plate and a lower damper plate, which are held by a locking means, and which are released from the holding state in an emergency and move downward in an extended manner to close the opening. , the upper damper plate and the lower damper plate are formed such that engaging pieces protruding from the upper and lower ends of the flat plate are fitted together in a facing manner so that the engaging pieces can engage with each other when extended; A fire prevention damper device for a door, characterized in that a suppressor is provided at a mid-height position of the guide frame to prevent passage of only the upper damper plate.