JP2000334056A - Screen shutter to insulate fire and smoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure air-tightness of a screen curtain by eliminating slack of the curtain and avoiding the overlapping part to be easily pushed open by the wind generated by the pressure difference due to fire, by imparting a certain tension to the overlapping part of the screen curtain. SOLUTION: The invention comprises a plurality of non-flammable or fire- resistant flexible screen curtains 12 equipped with weights 22 and 24 at the lower peripheral ends. The curtains are sent out from a winding apparatus 14 and divide the interior space of a building in such a way to allow free opening and closure. A series of anti-fire and anti-smoke screen shutters 10 is formed by overlapping the right end of a curtain on the left end of adjacent screen curtain one after another. Along each of the right and left end of the screen curtain are provided fire resistant and flexible tension tapes 34 and 34a each having a weight at the lower end. Each tension tape is given a tension weaker than that of the weight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof and smokeproof screen shutter for preventing the spread of fire and the spread of smoke by partitioning the interior space of a building with a screen curtain which is highly nonflammable or fireproof.

[0002]

2. Description of the Related Art Inside a building, fire protection equipment such as fire barriers and fire shutters for shutting off flames and smoke and fire opening and closing doors for allowing people to evacuate, etc., in preparation for a fire in the past. Evacuation passages are being systematically deployed. Recently, as a new fire protection system that replaces these fire barriers and fire shutters, a screen shutter for fire and smoke protection that uses a non-combustible or fire-resistant screen curtain to block fire and smoke has been proposed.

[0003] This fire and smoke screen shutter is
A plurality of screen curtains, which are rich in noncombustibility or fire resistance, and are flexible, are unreeled from the winding shaft and are suspended from the ceiling side, and a weight is attached to the lower edge of the screen curtain. In addition, the screen curtain can be prevented from swinging and its posture can be maintained in a stable state. As a result, the fire and smoke screen shutters partition the indoor space of the building and can block fire and smoke.

[0004] Further, such a fireproof and smokeproof screen shutter is provided with an opening / closing door for an evacuation opening, so that even after the screen shutter is closed, a person can pass through the evacuation opening to evacuate. I have. This door,
By forming a slit or the like in the overlapping portion of adjacent screen curtains, the screen is formed on the curtain itself.

[0005]

However, at the overlapping portion of a plurality of screen curtains and at the location of the opening / closing door formed at the overlapping portion, since the screen curtain is flexible and lightweight, the overlapping is difficult. There is a possibility that a gap is easily generated due to slack in the overlapped portion, and a gap is generated by pushing and opening the overlapped portion due to a pressure difference between the inside and outside of the screen shutter due to a fire.

[0006] The screen shutter is required to be airtight from the viewpoint of fire prevention and smoke prevention. However, if a gap is generated in the overlapping portion as described above, air flows in or smoke flows out of the space, and The function as a screen shutter for fire prevention and smoke prevention is significantly reduced. Therefore,
It is conceivable to attach a metal frame to the overlapped portion, but in this case, there is a problem that the screen shutter cannot be wound up or folded when stored.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and provides a certain tension to the overlapping portion of the screen curtain to remove the slack of the curtain itself and to prevent the occurrence of a fire when a fire occurs. It is an object of the present invention to provide a screen shutter for fire and smoke prevention in which an overlapped portion is prevented from being easily pushed open by a wind generated by a pressure difference between an inside and an outside, thereby ensuring airtightness by a screen curtain.

[0008]

According to a first aspect of the present invention, there is provided a screen shutter for fire and smoke prevention according to the present invention. A plurality of non-combustible or fire-resistant flexible screen curtains that are wound up and unwound from the winding device and partition the interior space of the building so as to be openable and closable are provided. In a fireproof and smokeproof screen shutter formed in a series by overlapping, a non-combustible or fireproof flexible tension having a lower end connected to the weight along each of the left and right ends of the screen curtain. A tape is provided, and a tension smaller than the weight of the weight is applied to each of the tension tapes.

According to this configuration, the left and right ends of the screen curtains that are superimposed on each other are maintained in tension by the tension of the tension tape disposed along the screen curtains. For this reason, it is possible to prevent the occurrence of a slack in the left and right end portions of the screen curtain and the occurrence of a flutter due to the wind, and to prevent a gap from being generated in the overlapping portion, so that the airtightness of the screen curtain can be maintained. Further, since the tension applied to the tension tape is set to be smaller than the weight of the weight attached to the lower edge of the screen curtain,
The screen curtain is not lifted upward by this tension, and can maintain the partition state of the internal space of the building.

According to a second aspect of the present invention, there is provided a screen shutter for fire and smoke prevention, wherein the tension tape is wound by a tension applying mechanism individually installed on the ceiling portion in synchronization with the winding device. The tension applying mechanism applies the above-mentioned tension to each tension tape.

According to this structure, the tension tape can be wound by the tension applying mechanism in synchronization with the lifting and lowering of the screen curtain fed from the winding device. It is in a state of tension, and it is possible to prevent the respective tension tapes from sagging, so that the screen curtain can be raised and lowered smoothly.

Further, the fireproof and smokeproof screen shutter according to a third aspect of the present invention is characterized in that a stopper for preventing the tension tape from being pulled out further when the screen curtain is closed is provided.

According to this configuration, when wind pressure due to a difference in internal and external pressures acts on the screen curtain in the closed state, the tension tape is also pulled out from the tension applying mechanism as the screen curtain is moved. This drawer can be blocked by a stopper. Therefore, the tilting of the screen curtain can be suppressed by the tension tape whose drawing-out has been prevented, and the tight state of the tension tape can be maintained to maintain the sealed state of the screen curtain.

[0014]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 4 show an embodiment of a screen shutter for fire and smoke protection according to the present invention. FIG. 1 is a cross-sectional view showing a blocking state of the screen shutter for fire and smoke prevention. FIG. FIG. 3 is a sectional view taken along the line AA in FIG. 2, and FIG. 4 is an enlarged sectional view of the part B in FIG.

The basic structure of the screen shutter 10 for fire and smoke protection according to the present invention is such that weights 22, 24 are attached to the lower end edges and are wound by a winding device 14 installed on a ceiling portion. A plurality of non-combustible or fire-resistant flexible screen curtains 12 are provided so as to open and close the interior space of the building so that the interior space can be opened and closed, and the left and right end portions 32 and 32a of adjacent screen curtains 12 are sequentially overlapped with each other. A screen shutter 10 for fire and smoke prevention formed on the left and right ends 32 and 32a of the screen curtain 12 along the lower ends of which are connected to weights 22 and 24, respectively. Flexible tension tapes 34, 34a are provided, and weights 22, 24 are attached to these tension tapes 34, 34a.
A tension smaller than the weight of the body is applied.

The tension tapes 34, 34a are
Tensioning mechanisms 36, 36a individually installed on the ceiling
Are wound in synchronization with the winding device 14, and the respective tension tapes 34, 34a
Is applied with tension. When the screen curtain 12 is closed, the tension tapes 34, 34a
Are provided with projections 38 and 38a as stoppers for preventing the further withdrawal.

That is, the fire and smoke screen shutter 10 of the present embodiment includes two or more screen curtains 12 and a winding device 14 for storing the screen curtains 12 as shown in FIGS. It is schematically configured. The screen curtain 12 is formed of a nonflammable or fire-resistant cloth material such as a woven glass fiber cloth or silica cloth, and has a function of blocking fire and smoke. The winding device 14 includes a winding drum 14b installed on the ceiling 16 so as to store the screen curtain 12 upward and driven by a motor 14a. And winding drum 1
The lower end of the screen curtain 12 wound around 4b is hung through a slit portion 14d formed in a housing 14c of the winding device 14 and an opening 16a in the ceiling.

Adjacent screen curtains 12 have left and right ends 3
2 and 32a are overlapped with each other by a predetermined size.
0 is formed. Further, the end 32 a of the other screen curtain 12 that forms the overlapped portion 18 overlaps a part of the door 20 to increase the airtightness of the door 20.

A door weight 22 as a weight is attached to the lower edge of the door 20, and a screen weight 24 as a weight is attached to the lower edge of the screen curtain 12 excluding the door 20. The door weight 22 and the screen weight 24 are formed in a uniform cross section along the lower edges of the opening / closing door 20 and the screen curtain 12, and apply a load evenly to the entire opening / closing door 20 and the screen curtain 12.
Each is arranged in a straight line in the horizontal direction. And
An opening / closing hinge 26 of the opening / closing door 20 is provided between the door weight 22 and the screen weight 24.

The opening / closing door 20 is located between the overlapping portion 18 and the lower edge of the screen curtain 12 and has a triangular shape. Is formed so as to be able to be bent along a hypotenuse 28 extending in the direction. If the back surface of the opening / closing door 20 is pushed by a hand or a body so as to open in the evacuation direction, the opening / closing door 20 is bent as shown by a dashed line in FIG. When pushed out to the near side of 12, the overlapping portion 18 is formed with an opening sufficient for a person to pass through, and this opening becomes the evacuation opening 30.

Further, the door weight 22 is provided on the opening / closing door 20.
Is opened, it is lifted up around the opening / closing hinge 26, so that when the evacuee passes and the pressing force of the opening / closing door 20 is released, it moves to return to the original position by its own weight. Then, the overlapping portion 18 is automatically closed again.

Here, in the present embodiment, each of the left and right end portions 32, located at the overlapping portion 18 of the screen curtain 12,
Tension tapes 34, 34a are provided along 32a. The tapes 34 and 34a are formed in a belt shape using a nonflammable or fire-resistant flexible material, for example, stainless steel, similarly to the screen curtain 12 described above. The lower ends of the tapes 34 and 34a are connected to the door weight 22 and the screen weight 24, respectively.

On the other hand, the upper ends of the tapes 34, 34a are respectively wound around tension applying mechanisms 36, 36a. These tension applying mechanisms 36 and 36a are installed in the housing 14c of the winding device 14 as shown in FIG. 1, and one of the tension applying mechanisms 36 that winds the tape 34 is on the front side of the screen curtain 12 (FIG. 1). The other tension applying mechanism 36a that winds the tape 34a is disposed on the back side (the left side in FIG. 1) of the screen curtain 12, while being disposed on the middle right side. Then, the respective tension applying mechanisms 36, 36a
The tapes 34, 34a fed out of the housing 14c hang down through the slit portion 14d of the housing 14c and the opening 16a of the ceiling similarly to the screen curtain 12.

The tension applying mechanisms 36, 36a have a well-known structure, and are configured so that a constant urging force acts in the winding direction, whereby a constant tension (back tension) is always applied to the tapes 34, 34a. Is added. At this time, the tension applied to the tapes 34 and 34a is set smaller than the weights of the door weight 22 and the screen weight 24, and the screen curtain 12 is wound on the winding drum 1.
4b, the weights 22, 24 when descending
The weight of the tape 34, 34a causes the tension applying mechanism 3
6, 36a.

A stopper for preventing the tapes 34, 34a from being pulled out further when the screen curtain 12 is closed is provided at a portion where the tapes 34, 34a are fed out from the tension applying mechanisms 36, 36a. That is,
In the present embodiment, as shown in FIG. 4, protrusions 38, 38a as stoppers are provided on the tapes 34, 34a, and when the weights 22, 24 have landed, these protrusions 38, 34a are provided.
38a is opposed to the slit portion 14d with a slight gap.

With the above construction, the screen shutter 10 for fire prevention and smoke prevention of the present embodiment is arranged such that the screen curtain 12 is normally in the winding drum 1 of the winding device 14 when no fire occurs.
4b and stored in the ceiling 16
The belts 34, 34a are also wound around the tension applying mechanisms 36, 36a. The screen curtain 12 fed from the winding drum 14b due to the occurrence of a fire.
Is a door weight 22 and a screen weight 24
And the weights 22 and 24 are placed on the floor F to block the internal space S of the building. When the screen curtain 12 is lowered, the tapes 34 and 34a are also pulled out from the tension applying mechanisms 36 and 36a.

In this way, the screen curtain 12 blocks the internal space S, thereby sealing the fire side, preventing air from flowing into the fire side and preventing smoke generated by the fire from flowing out. can do. Also,
A person who is left behind after the screen curtain 12 is shut off can open and close the door 20 to pass through.

Incidentally, the tension applying mechanisms 36, 36a
The tapes 34, 34a drawn out from the tape are disposed along the respective left and right ends 32, 32a of the screen curtain 12 of the overlapping portion 18, and these tapes 34, 34
A tension is applied to a by tension applying mechanisms 36 and 36a so that a tension state is maintained. For this reason, the left and right ends 32, 32a of the screen curtain 12 are provided with tension by the tapes 34, 34a in the tension state, thereby preventing the ends 32, 32a from becoming slack or being swung by the wind. , The overlapping portion 18
Of the screen curtain 1
2 can be kept airtight.

At this time, the tension applied to the tapes 34, 34 a depends on the weights for the door 22 and the screen weights 24 attached to the lower edge of the screen curtain 12.
, The screen curtain 12 is not lifted upward by this tension.

The tapes 34, 34a can be unwound from the tension applying mechanisms 36, 36a in synchronization with the descent of the screen curtain 12, which is unwound from the winding device 14. He is always nervous even during the descent. Therefore, when the screen curtain 12 is lowered, the respective tapes 34, 34
a can be prevented from sagging and can be prevented from catching on the slit portion 14d or the like, and the lowering operation of the screen curtain 12 can be performed smoothly.

Further, when the screen curtain 12 is closed, the projections 38, 38 provided on the tapes 34, 34a are provided.
a faces the slit portion 14d, and the tapes 34, 34
When a is pulled out further, it can be locked and prevented. That is, when the screen curtain 12 is moved by the wind pressure generated by the internal and external pressure difference due to the fire on the screen curtain 12 in the closed state, the tapes 34, 34
a is about to be pulled out from the tension applying mechanisms 36, 36a, but this pulling out can be prevented by the protrusions 38, 38a, so that the screen curtain 12 can be suppressed from being tilted and the tension of the tapes 34, 34a can be reduced. The tension of the screen curtain 12 can be maintained by holding.

In this embodiment, the protrusions 38,
Although the stopper 38a is used as the stopper, the present invention is not limited to this, and a brake mechanism that sandwiches and stops the tapes 34, 34a may be used, or a mechanism that prevents extension by the tension applying mechanisms 36, 36a itself may be used. Furthermore, although the belt-shaped tapes 34 and 34a are used as the tension tapes, a string using the same material may be used, or a cross-sectional convex shape in which a thin plate is curved in one direction may be used, but it does not thermally shrink. It is desirable to use a material.

In the above embodiment, the arrangement of the tension tapes 34 and 34a has been described by exemplifying the opening / closing door 20. However, when a plurality of screen curtains are arranged to form a screen shutter, the screen curtains overlap each other. It is a matter of course that tension tapes may be provided along the right and left ends of these portions to be the joining portions, and even in such a case, the same operation and effect as those of the above embodiment can be ensured. Can be.

[0034]

As described above, according to the fire and smoke prevention screen shutter of the present invention, a tension tape to which tension is applied is provided along each of the left and right ends of the overlapping portion of the screen curtain. By applying a certain amount of tension to each end with tension tape, the sag of the curtain itself is removed, and the overlapping part is prevented from being easily pushed open by the wind generated by the internal and external pressure difference at the time of fire. Thus, there is an excellent effect that the airtightness of the screen curtain can be ensured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a fireproof and smoke-proof screen shutter according to an embodiment of the present invention, which is shut off.

FIG. 2 is a perspective view of a main part of a screen shutter for fire prevention and smoke prevention showing an embodiment of the present invention.

FIG. 3 is a sectional view taken along the line AA in FIG. 2, showing one embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a portion B in FIG. 1 showing one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Screen shutter for fire prevention and smoke prevention 12 Screen curtain 14 Winding device 18 Overlapping part 22 Weight for door (weight) 24 Weight for screen (weight) 34, 34a Tension tape

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyomi Yasuhara 2-12-9 Shibadaimon, Minato-ku, Tokyo Unitika Glass Fiber Co., Ltd. (72) Inventor Yuji Kadokawa 2-12-9 Shibadaimon, Minato-ku, Tokyo Unitika Glass Fiber Co., Ltd. (72) Inventor Masahiko Honma 4-640 Shimoseito, Kiyose-shi, Tokyo Obayashi Technical Research Institute

Claims (3)

[Claims] 1. A weight is attached to a lower end edge, and is wound by a winding device installed on a ceiling portion.
A plurality of non-combustible or fire-resistant flexible screen curtains which are unwound from the winding device and partition the interior space of the building so as to be openable and closable are provided. In the fireproof and smokeproof screen shutter formed in the above, a noncombustible or fireproof flexible tension tape having a lower end connected to the weight is provided along each of the left and right ends of the screen curtain. A screen shutter for fire and smoke prevention, wherein a tension smaller than the weight of the weight is applied to each of the tension tapes. 2. The tension tape is wound by a tension applying mechanism individually installed on the ceiling portion in synchronization with the winding device, and the tension is applied to each tension tape by the tension applying mechanism. The fireproof and smokeproof screen shutter according to claim 1, wherein: 3. The screen shutter for fire and smoke prevention according to claim 1, further comprising a stopper for preventing the tension tape from being further pulled out when the screen curtain is closed.