JP3542282B2 - Fire and smoke shutters - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fireproof and smokeproof shutter made of a fireproof sheet.
[0002]
[Prior art]
2. Description of the Related Art In recent years, in high-rise buildings and the like, fire and smoke prevention shutters installed in spaces such as passageways and common spaces have become widespread in order to prevent the spread of fire and the spread of smoke during a fire.
[0003]
As this fireproof and smokeproof shutter, one using a fireproof sheet is known, and is described in JP-A-8-164218 and JP-A-9-253229.
[0004]
A fire and smoke prevention shutter using a fire resistant sheet has features such as being lightweight and easy to construct, being able to obtain a large area relatively easily, and requiring a small storage space.
[0005]
In recent years, fireproof and smokeproof shutters having the above characteristics have been required to have a large-area structure that is gradually arranged in a space such as a passage having a large opening area or a common space.
[0006]
[Problems to be solved by the invention]
As a method of obtaining a fire and smoke shutter having a large area, there is a method of sewing a predetermined area according to a construction object by custom order. However, this increases the manufacturing cost.
[0007]
In addition, even if a fireproof and smokeproof shutter using a fireproof sheet characterized by its light weight is used, if it has a certain area or more, it will become heavy and bulky, so transportation costs will increase. This causes problems such as difficulty in carrying and deterioration of workability.
[0008]
As a method of solving such a problem, there is a method of dividing a fireproof sheet constituting a fireproof smokeproof shutter into a plurality of sheets. For example, Japanese Patent Application Laid-Open No. 9-253229 describes a configuration in which a plurality of refractory sheets are continuously provided.
However, the configuration described in this publication arranges a part of adjacent refractory sheets in an overlapping manner and is not a configuration fixed to each other.
[0009]
According to the experiments of the present inventors, a gap is generated in the overlapped portion due to hot air generated at the time of the fire resistance test simply by arranging a part of the adjacent refractory sheets in an overlapping manner. Was found to leak.
[0010]
In addition, in the event of a fire, considerable wind pressure is expected to be applied to the fire and smoke prevention shutter, and it is required to withstand it. In this sense, simply arranging the plurality of refractory sheets partially overlapping one another does not provide a sufficient function as a fireproof and smokeproof shutter. It should be noted that increasing the area of the overlapped portion alleviates this problem, but increases the cost because the effective use area of the fire-resistant sheet is reduced.
[0011]
The present invention has been invented to solve such a problem, and an object of the present invention is to provide a large-area structure at a low cost, using a fire-resistant sheet having high workability. It provides a smoke shutter.
[0012]
[Means for Solving the Problems]
A first invention according to the present invention is a fireproof and smokeproof shutter in which a shutter curtain composed of a plurality of fireproof sheets is wound and housed, wherein the fireproof sheets are connected by a fireproof surface fastener or a fastener. In addition, flat weights divided from both sides thereof are arranged at the lower part of the refractory sheet, and are fixed by tightening with bolts to enhance the integrity of the divided weights .
[0013]
A second invention is characterized in that the opposed weights are arranged in a staggered pattern with respect to each other.
[0014]
[Action]
According to the first aspect, each of the divided weights can be transported in divided units, so that the transport is facilitated. In particular, in a high-rise building, since there is a limit on the length of the material that can be carried to the material elevator, it is useful to adopt a divided structure. The weight allows the shutter curtain to be lowered by its own weight, and in the lowered state, it is possible to prevent the shutter curtain from being turned up or bent by wind pressure generated during a fire.
[0015]
According to the second invention, the integrity of the divided weight provided below the shutter curtain is improved.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described. FIG. 1 is a schematic perspective view showing a fire and smoke prevention shutter of the present invention, FIG. 2 is a perspective view showing one example of a connecting part, FIG. 3 is a perspective view showing two examples of a connecting part, and FIG. 3, FIG. 5 is a schematic sectional view showing three examples of the connecting portion, and FIG. 6 is a schematic sectional view showing one example of how to attach the weight.
[0017]
FIG. 1 shows a basic structure of a fireproof and smokeproof shutter of the present invention. In the drawing, a shutter curtain 1 having a structure in which three fireproof sheets 2a, 2b and 2c are connected is shown. It is not limited to three refractory sheets 2a, 2b,... As the refractory sheets 2a, 2b,..., A cloth woven with silica cloth or stainless steel thread can be used.
[0018]
The upper ends of the refractory sheets 2a, 2b,... Are wound around the shaft 3 and stored as shown. A flat weight 4 is attached to a lower portion of the shutter curtain 1. The weight 4 has a function of lowering the shutter curtain 1 by its own weight, and a function of preventing the shutter curtain 1 from being turned up or bent by wind pressure generated at the time of fire in a lowered state.
[0019]
The weight 4 may be a single elongated flat plate. However, as shown in FIG. 2, the weights 4a, 4b, Are attached, the ends are overlapped, connected and fixed by bolts 5, and integrated.
[0020]
The divided weights 4a, 4b,... Can be transported in divided units, respectively, so that the transport is facilitated. In particular, in a high-rise building, since there is a limit on the length of the material that can be carried to the material elevator, it is useful to adopt a divided structure.
Further, even in the case of the divided structure, the shutter curtain is not wound up by the wind pressure since the integrated structure is finally obtained. The number of divisions is arbitrary and may be finely divided. The weight 4 is preferably made of metal, and is not limited to a flat plate shape, but may be a rod shape having an arbitrary cross section.
[0021]
Next, a structure for connecting the adjacent refractory sheets 2a, 2b, 2c to each other will be described. The following connecting means may be used.
The connecting means 6 of the first example is an example using a fire-resistant surface fastener (magic tape) 7. As shown in FIG. 2, a male surface fastener 9 and a female surface fastener 10 provided at respective overlapping end portions 8a, 8b of the refractory sheets 2a, 2b,. The fire-resistant hook-and-loop fastener 7 may be made of stainless steel or other heat-resistant material.
[0022]
The connecting means 15 of the second example is an example using a fire-resistant fastener 16. As shown in FIG. 3, a meshing portion 18 of a fastener 16 meshing with cloths 17a, 17b knitted with stainless steel threads sewn to respective end portions 8a, 8b of the refractory sheets 2a, 2b,. ing.
[0023]
The fire-resistant fastener 16 is prepared by attaching a metal engagement portion to a fire-resistant woven cloth, and the fire-resistant sheets 2a and 2b are sewn to this.
The meshing portion 18 meshes with the cloths 17a, 17b, so that the adjacent refractory sheets 2a, 2b are connected to each other. When this fire-resistant fastener 16 is used, the connection work at the construction site becomes extremely simple, which is effective in reducing the construction cost.
[0024]
The connecting means 20 of the third example is an example for improving the above-mentioned second example and improving its fire resistance and shielding properties, and has a structure in which the surface of the fastener 16 is covered by the end 8b of the fire-resistant sheet 2b. Has become.
As shown in FIG. 5, at the overlapping end portions 8a and 8b of the adjacent refractory sheets 2a and 2b, a cloth 17a is attached to the surface of one end 8a, and the cloth 17b is attached to the back surface of the other end 8b. When attached, the other end 8b is characterized by a cover structure that covers the surface of the one end 8a.
[0025]
Further, in order to enhance the integrity of the divided weights provided at the lower portion of the shutter curtain 1, there is an attachment method shown in FIG. As described above, the weights 4d, 4e and 4f, 4g, which are divided from both sides at the lower portions of the adjacent refractory sheets 2a, 2b connected by the hook-and-loop fastener 7 or the fastener 16, are arranged respectively, and the bolts 5, They are tightened and fixed by 5, ... As shown, the facing weights 4d, 4e and 4f, 4g are preferably arranged in a staggered pattern.
[0026]
As described above, according to the present invention, by using a fire-resistant surface fastener or a fastener as the connecting means, the connecting means does not become an obstacle when the shutter curtain is wound and stored. Further, the connection work of the fire-resistant sheet at the construction site is simplified.
[0027]
In addition, since the area of the overlapped portion of adjacent fire-resistant sheets can be reduced, the effective use area of the fire-resistant sheet increases, and if the fire-resistant sheet is damaged during construction or during an operation test, the fire-resistant sheet in that part must be replaced. Can be easily replaced.
[0028]
Since there is no gap in the connection portion of the fire-resistant sheet, the function as a fire and smoke prevention shutter is not impaired. Further, when the dimensions and the like are changed during construction, it is possible to cope with the replacement of a part of the refractory sheet, so that the cost can be reduced. Further, the refractory sheet can be standardized, and the production cost can be reduced.
[0029]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the fire prevention smoke prevention shutter of this invention, connection of the adjacent refractory sheet can be performed very easily and in a short time, and a large area thing can be obtained at low cost.
[0030]
The weights provided below the refractory sheet can be transported in divided units, respectively, so that the transport is facilitated. In particular, in a high-rise building, since there is a limit on the length of the material that can be carried to the material elevator, it is useful to adopt a divided structure. The weight allows the shutter curtain to be lowered by its own weight, and in the lowered state, it is possible to prevent the shutter curtain from being turned up or bent by wind pressure generated during a fire.
Since the connection means of the fire-resistant sheet uses a fire-resistant hook-and-loop fastener or a fastener, it does not become an obstacle at the time of winding and storing, and smooth winding can be performed. Further, the connection work of the fire-resistant sheet at the construction site is simplified, and the workability is good.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing a fire and smoke prevention shutter of the present invention.
FIG. 2 is a perspective view showing an example of a connecting portion.
FIG. 3 is a perspective view showing two examples of a connecting portion.
FIG. 4 is a schematic sectional view of FIG. 3;
FIG. 5 is a schematic cross-sectional view showing three examples of a connecting portion.
FIG. 6 is a schematic sectional view showing an example of how to attach a weight.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shutter curtain 2a, 2b Fireproof sheet 4 Weight 7 Surface fastener 16 Fastener

Claims (2)

In a fireproof and smokeproof shutter in which a shutter curtain composed of a plurality of fireproof sheets is wound and stored,
The fire-resistant sheet is connected by a fire-resistant surface fastener, or a fastener,
A fireproof and smokeproof shutter characterized by increasing the integrity of the divided weights by placing flat weights divided from both sides at the lower portion of the fireproof sheet and tightening and fixing with bolts. The fire and smoke shutter according to claim 1, wherein the opposed weights are arranged in a staggered manner.

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