JPH1015100A - Screen system for fireproof zone to easily pass person - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and inexpensively execute fire prevention while using a heat resistant and flexible screen made of cloth, to reduce a space for installation, to provide remarkably high fireproof and smoke-proof performance by effectively shielding opening parts inside a building, and further, to let a person easily pass through a screen plane while partitioning it. SOLUTION: Respective individual sub weight bars 6a are horizontally fixed at the lower ends of respective short strip pieces 4a and 4b on the front curtain and rear curtain of a screen refuge passage part 1a, and the respective sub weight bars are arranged almost in contact with main weight bars. A lot of sub weight bars are dynamically loosely restricted to the main weight bars by suitable coupling means (wires 7a and coil springs 8a), remarkably displaced in respect to the main weight bars while receiving external force applied in case the person tries to pass, and returned to the prescribed arranging position almost in contact with the main weight bars by the restricting force when there is no external force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire prevention / smoke prevention compartment structure for preventing the spread of fire in a building and the spread of smoke, and more particularly to the use of a fire-resistant screen made of a woven fabric of glass fiber or silica fiber. And a screen device for a fire-prevention compartment, which allows a person to easily pass through.

[0002]

2. Description of the Related Art In order to prevent the spread of fire and the spread of smoke in a building in the event of a fire, and to facilitate evacuation, fire and smoke prevention compartments must be appropriately set according to a certain floor area or use of a room. Evacuation routes must be secured.
From this viewpoint, equipment such as a fire barrier, a smoke hanging wall, a fire shutter, and a fire door are systematically arranged.

[0003] As is well known, a fireproof shutter is a steel shutter having fireproof performance, and is usually of an electric winding type having a structure in which a large number of slats are connected, and is wound in an upper part and stored. It operates between a state in which it is pulled down and the opening in the building is blocked. Due to the structure of the fireproof shutter, the shutter itself cannot be incorporated with a fireproof door serving as an evacuation passage, so that when the shutter is lowered and the opening is closed, no person can pass completely. Therefore, in order to secure an evacuation passage, it is necessary to install a fire door in the immediate vicinity of the fire shutter. The fire door automatically closes in the event of a fire and can be pushed open in the evacuation direction at any time.

[0004]

[0005] The performance of fire prevention and smoke prevention can be improved by providing a large number of partitions for fire prevention and smoke prevention at required places. However, it is impossible to install many partitions ignoring the original functionality and ease of use of the building, and to ensure the consistency with the wall design, storage space for everyday use, and ease of evacuation in an emergency. It is necessary to think from various aspects, such as the implementation cost, etc., which is troublesome for designers.

Therefore, the present inventors can easily and inexpensively carry out using a heat-resistant flexible cloth screen, require only a small installation space, and effectively shield the opening inside the building. We have been conducting research and development on a screen device for a fire-prevention compartment that exhibits high fire and smoke prevention performance, and that allows people to easily pass through the screen surface in a partitioned state, making it easy to evacuate in an emergency (Reference: Japanese Architecture) Summaries of academic conference abstracts, 3008, August 1995).

[0006] The basic concept of the "screen device for a fireproof compartment through which a person can easily pass" according to the development of the present inventors is that the space inside the building is divided by a fireproof screen extending from the ceiling to the floor, and the screen of the screen is rejected. A slit extending in the vertical direction from the intermediate height portion to the lower portion is formed at an appropriate position to provide an evacuation passage. If a flexible silica cloth or the like is used as the screen, the slit can be easily pushed out by a human hand, and a person can easily pass through the widened gap.

[0007] Research and development were promoted based on such a concept, and various prototypes and experimental evaluations were repeated. As a result, it is possible to improve both the fire and smoke prevention performance of the evacuation passage formed with the slit (increase the heat and smoke blocking performance) and to make it easier for a person to pass through that portion. I found it was not easy. In other words, when a person passes through the slit-type evacuation passage, a person pushes and spreads the slit with his or her hand to create a large gap, but after the person has passed, a large gap was created in the slit part If left as it is, the subsequent fire and smoke protection performance will be significantly reduced. If various measures are taken so that the film form of the slit portion recovers immediately after a person passes and no unnecessary gap remains, trouble tends to occur when a person passes through the portion.

The present invention incorporates the results of research and development from the above viewpoints, and its purpose is to easily and inexpensively implement it using a heat-resistant, flexible cloth screen, and to provide a small installation space. It is small enough to effectively shield the opening inside the building and exhibit considerably high fire and smoke prevention performance,
In addition, it is an object of the present invention to provide a screen device for a fire-prevention compartment that allows a person to easily pass through a screen surface in a partitioned state and is easily evacuated in an emergency.

[0009]

A screen device for a fire protection compartment according to the present invention (Claim 1) is installed so as to hang down so as to cover an opening inside a building, and extends from a ceiling or a beam to a floor and from both sides. Mainly heat-resistant screens whose ends reach walls and columns. Further, the screen includes an evacuation passage portion set at a predetermined portion and another main body portion, and the evacuation passage portion is formed by two sheets of a front curtain and a back curtain which are separated from each other. Further, the front curtain and the back curtain of the evacuation passage are each divided into a number of strips by a number of slits extending vertically from a lower end, and the slit position of the front curtain and the slit position of the back curtain overlap. It is shifted so as not to become. At the lower end of the screen, a main weight bar that is continuous over substantially the entire width is horizontally disposed. The main weight bar is fixed to the lower end of the screen main body. The curtain strip and the lower end of the back curtain strip are separated. Further, individual sub-weight bars are horizontally fixed to the lower ends of the front curtain strip and the back curtain strip in the evacuation passage, respectively, and each of these sub-weight bars is substantially in contact with the main weight bar. Are arranged.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the screen device for a fire compartment according to the present invention having the above-mentioned requirements, a large number of the sub-weight bars are mechanically loosely restrained with respect to the main weight bar by appropriate connecting means. When the external force is applied when a person tries to pass through, the main weight bar is largely displaced, and when the external force disappears, the main weight bar is returned to a predetermined arrangement position almost in contact with the main weight bar by the restraining force. The connecting means can connect the main weight bar and each of the sub weight bars with an elastic member (claim 2). In this case, it is possible to connect between the adjacent sub-weight bars by the elastic elastic member (claim 3). Further, as the elastic elastic member, a member in which a wire and a coil spring are connected can be adopted (claim 4), and the elastic member in which the wire and the coil spring are connected is formed of a hollow body. A configuration that penetrates the hollow portion can be adopted (Claim 5), and a configuration can be adopted in which the wire passes through a stop hole provided in the main weight bar between the sub weight bars (Claim 6).

Further, the coupling means may have a structure in which the main weight bar and each of the sub weight bars are attracted by a magnetic force by a combination of a permanent magnet and a magnetic material.

In some cases, the evacuation passage may be
The object of the present invention can be almost achieved even in a mode in which only one of the front curtain strip and the back curtain strip is present without stacking.

[0013]

1 to 3 show a schematic configuration of a screen device according to an embodiment of the present invention. This apparatus mainly includes a heat-resistant screen 1 made of a woven glass fiber cloth or silica cloth. The screen 1 is wound around a shaft 2 that is horizontally arranged below a ceiling or a beam, and hangs vertically from the shaft 2 by its own weight, and a lower end reaches the floor. Also, both sides of the screen 1 are in contact with the wall surface or the column surface inside the building, and the opening inside the building is partitioned off by the screen 1 and is blocked. At that time, in order to eliminate the gap between the building and the both sides of the screen 1, the guide rails 3 are vertically arranged on the wall surface or the column surface,
The side end of the screen 1 fits into the groove of the guide rail 3. Needless to say, the winding drive device is connected to the shaft 2 so that the screen 1 can be moved up and down electrically, and when unnecessary, the entire screen 1 can be wound up and stored under the ceiling.

An evacuation passage 1 is provided at the center of the screen 1.
a is set, and other portions are referred to as a main body 1b. The screen evacuation passage 1a is composed of a front curtain and a rear curtain which are separated from each other. The front and back curtains of this part have a number of slits Sa, each extending vertically from the lower end,
It is divided into many strips by Sb, and these strips are referred to as front curtain strip 4a and back curtain strip 4b.

The front curtain slit Sa dividing the front curtain strip 4a and the back curtain slit Sb dividing the rear curtain strip 4b are shifted so as not to overlap. That is,
The gap of the slit Sa between the front curtain strips 4a is the back curtain strip 4
b, the gap of the slit Sb between the back curtain strips 4b is closed by the front curtain strip 4a. Due to this overlap, the performance as a partition material for fire and smoke prevention sections is maintained.

At the lower end of the screen 1, a main weight bar 5 continuous over almost the entire width is horizontally disposed. The main weight bar 5 is fixed to the lower end of the screen main body 1b having no slit. The front strip 4a and the back curtain strip 4 as the evacuation passage 1a are provided.
b is separated from the lower end. Apart from the main weight bar 5, individual short sub-weight bars 6a are horizontally fixed to the lower end of the front curtain strip 4a, and individual short sub-weight bars are individually fixed to the lower end of the back curtain strip 4b. 6b is fixed horizontally.

The portion of the main weight bar 5 located immediately below the evacuation passage 1a is notched at its upper part.
It is thinner than the part fixed to the main body 1b.
On the central notch of the thinned main weight bar 5, two rows of linearly connected sub weight bars 6a and two rows of similarly linearly connected sub weight bars 6b are provided.
In a row.

As described above, although the main weight bar 5 and the sub weight bars 6a and 6b are combined very close to each other, they are not necessarily fixed. As described in detail below, each sub-weight bar 6a,
6b is mechanically loosely restrained with respect to the main weight bar 5 by an appropriate coupling means, and is greatly displaced with respect to the main weight bar 5 by receiving an external force applied when a person tries to pass through. When the external force disappears, it returns to the predetermined arrangement position substantially in contact with the main weight bar 5 due to the restraining force of the connecting means.

A specific example of the coupling means will be described in detail. The sub-weight bars 6a and 6b have holes penetrating in the horizontal direction, and a hole continuous with the through-hole is formed in the main weight bar 5.

One wire 7a (7b) is passed through a series of through holes of each sub weight bar 6a (6b), and both ends of the wire 7a (7b) are inserted into holes of the main weight bar 5. ing. Main weight bar 5
The coil springs 8a (8b) are connected to both ends of the wire 7a (7b), respectively, and the other end of the coil spring 8a (8b) is
It is fixed to. The wire 7a (7b) and two coil springs 8a (8b) connected to both ends of the wire 7a (7b) are elastic elastic members of the main element of the coupling means.

The main weight bar 5 has a hook-shaped retaining hole 9a (9b) projecting from a portion located between the adjacent sub weight bars 6a and 6a (between 6b and 6b). And the sub weight bars 6a and 6a
A wire 7a is passed through the stop hole 9a, and a wire 8b between the sub weight bars 6b and 6b is passed through the stop hole 9b.

In the above configuration, the entire screen 1 hangs down due to its own weight and the weight of the main weight bar 5 and the sub weight bars 6a and 6b, and is almost stable in a vertical posture. In addition, the sub-weight bars 6a and 6b are mechanically loosely restrained with respect to the main weight bar 5 by the coupling means. That is, the wire 7a (7b) passes through the through hole of each sub weight bar 6a (6b) and each stop hole 9a (9b) of the main weight bar 5, and the coil spring 8a
Since an appropriate tension is acting on the wire 7a (7b) by the elastic force of (8b), the sub-weight bars 6a (6b) are aligned so as to be aligned by this tension,
On the main weight bar 5, a row of sub weight bars 6a and a row of sub weight bars 6b are arranged. In this state, as described above, there is almost no gap in the screen evacuation passage 1a, and even if a slight wind pressure or pressure difference acts, the screen 1 does not easily move and maintains a stable posture. This provides a significantly higher level of fire protection and smoke protection.

On the other hand, when a person wants to pass through the screen evacuation passage 1a, the user attempts to push and spread the strips 4a, 4b by pushing his or her body through the slits Sa, Sb. This external force is applied to the strips 4a, 4b and the sub weight bars 6a, 6a.
b to the wires 7a, 7b and the coil spring 8
a, 8b are stretched. That is, the wires 7a, 7b extend at the strip pieces 4a, 4b pressed by the refugee, and the specific sub weight bars 6a, 6b are displaced from the normal position (a position parallel to and close to the main weight bar 5). , The slits Sa and Sb are greatly opened. A person passes through the open gap.

When a person passes, the weight of each member and the spring force of the coil springs 8a and 8b cause the member to pass.
The sub-weight bars 6a, 6b and the strips 4a, 4b quickly and reliably return to the normal position, and maintain a high level of fire prevention performance and smoke prevention performance.

[0025]

According to the present invention, a screen device for a fire protection compartment can be easily and inexpensively implemented by using a heat-resistant flexible screen made of cloth, requires a small installation space, and effectively opens an opening inside a building. It provides a very high level of fire and smoke protection when shielded, and allows people to easily pass through the screen in a partitioned state. In particular, it is extremely rational to enhance the fire and smoke prevention performance of the evacuation passage with slits (to increase the heat and smoke blocking performance) and to make it easier for people to pass through that area. Can be compatible.

[Brief description of the drawings]

FIG. 1 is a front view of a screen device according to an embodiment of the present invention.

FIG. 2 is a plan sectional view of the same device.

FIG. 3 is an enlarged sectional view of a main part of the same device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Screen 1a Evacuation passage part 1b Main body part 2 axis 3 Guide rail 4a, 4b Strip piece Sa, Sb slit 5 Main weight bar 6a, 6b Sub weight bar 7a, 7b Wire 8a, 8b Coil spring 9a, 9b Hook type stop hole

Claims (8)

[Claims] 1. A screen device for a fire prevention section through which a person can easily pass, which has the following requirements (1) to (6). (1) A heat-resistant screen which is installed so as to hang down so as to shield the opening inside the building, reaches from the ceiling or under the beam to the floor, and has both ends reaching a wall or a pillar. (2) The screen includes an evacuation passage portion set at a predetermined portion and another main body portion, and the evacuation passage portion is formed by two sheets of a front curtain and a back curtain which are separated from each other. (3) The front curtain and the back curtain of the evacuation passage are each divided into a number of strips by a number of slits extending vertically from a lower end, and the slit position of the front curtain and the slit position of the back curtain are different. It is shifted so that it does not overlap. (4) A main weight bar, which is continuous over substantially the entire width, is horizontally disposed at the lower end of the screen, and the main weight bar is fixed to a lower end of the screen main body. The front curtain strip and the lower end of the back curtain strip are separated. (5) Separate sub-weight bars are horizontally fixed to lower ends of the front curtain strip and the back curtain strip in the evacuation passage, respectively, and each of these sub-weight bars substantially contacts the main weight bar. Are arranged. 2. The apparatus according to claim 1, wherein the plurality of sub-weight bars are mechanically loosely restrained with respect to the main weight bar by an appropriate coupling means, and apply an external force applied when a person tries to pass through. The main weight bar is displaced largely with respect to the main weight bar, and returns to a predetermined arrangement position substantially in contact with the main weight bar due to the restraining force when the external force is eliminated. A screen device for a fire prevention section through which a person can easily pass, wherein the bar and each of the sub-weight bars are connected by an elastic elastic material. 3. The screen device according to claim 2, wherein adjacent sub-weight bars are also connected by the elastic elastic member. 4. The screen device for a fire prevention section according to claim 2, wherein the elastic elastic member is formed by connecting a wire and a coil spring. 5. The apparatus according to claim 4, wherein the elastic elastic member connecting the wire and the coil spring penetrates through the hollow portion of each of the sub-weight bars made of a hollow body. Screen device for fire compartment that can pass through. 6. The screen device according to claim 5, wherein the wire passes through a stop hole provided in the main weight bar between the sub weight bars. 7. The apparatus according to claim 1, wherein said coupling means attracts said main weight bar and said sub weight bars by a magnetic force by a combination of a permanent magnet and a magnetic material. A screen device for a fire compartment that can be used. 8. The apparatus according to claim 1, wherein the evacuation passage is not two sheets but only one of the front curtain strip and the back curtain strip. A screen device for a fire compartment that can pass through.