JP2000308691A - Fire-protective and smoke-preventive shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire-protective and smoke-preventive shutter provided on an escape opening of the compatible structure of the easy passage at the escape opening with a shielding function requested for the fire-protective and smoke-preventive shutter. SOLUTION: Two doors 3a, 3b of a fire-protective sheet are continuously provided on a shutter curtain formed of the fire-protective sheet, and the doors 3a, 3b form fire-protective sheets 2a, 2b and escape openings 4a, 4b adjacent to each other. Weights are attached to lower ends of the shutter curtain 1 and the doors 3a, 3b, and the weights 17a, 17b at the lower ends of the doors are coupled by the weight 15 at the lower end of the shutter curtain and a universal joint 18.

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 shutter using a fireproof sheet having an escape opening.

[0002]

2. Description of the Related Art Fireproof and smokeproof shutters for shielding flames, high-temperature gas, smoke and the like in the event of a fire are provided in passages in buildings.

Conventionally, as a fire and smoke prevention shutter, a shutter using a metal slat is generally known.
Recently, fireproof and smokeproof shutters using fireproof sheets such as glass cloth and silica cloth have been known, for example,
It is disclosed in Japanese Patent Application Laid-Open No. 9-206394.

[0004] A fireproof and smokeproof shutter using a fireproof sheet has the following features. The overall weight is light and easy to construct. High degree of freedom in selecting construction sites. The occupied volume in the stored state is small. A large area can be easily obtained. High consistency with the design inside the building.

On the other hand, fire and smoke shutters are required to have an evacuation exit (emergency exit) through which a late escaper can pass. In the above-mentioned JP-A-9-206394,
An evacuation exit having a structure in which a slit is provided on a shutter surface is disclosed. The evacuation exit using the slit has a feature that the structure is simple and the evacuees can easily pass through.

However, in the above-described structure in which only a slit is provided, for example, when pressure is applied to a fire and smoke prevention shutter during a fire, a flame, a high-pressure gas or smoke flows through the slit, and the fire and smoke prevention. The original function of the shutter, that is, the function of blocking fire, high-temperature gas, smoke, etc., is impaired.

[0007]

SUMMARY OF THE INVENTION In view of the above, the present invention provides a fire and smoke protection device having an escape port having a structure that achieves both ease of passage at an evacuation opening and a shielding function required for a fire and smoke prevention shutter. It is an object to provide a shutter.

More specifically, the problem to be solved by the present invention is as follows by providing an evacuation opening in a fire and smoke prevention shutter using a fire-resistant sheet. Be able to pass through the evacuation exit smoothly. When the evacuation exit is not in use, there is little reduction in shielding. The evacuation exit is automatically closed after using the evacuation exit. The entire shutter can be wound up and stored with a simple structure.

[0009]

Means for Solving the Problems A first invention of the present invention is:
Two doors of a fire-resistant sheet are provided side by side on a shutter curtain made of a fire-resistant sheet, and the two doors constitute an adjacent fire-resistant sheet and an evacuation opening. It is characterized by being connected to the lower end by a universal joint.

According to a second aspect of the present invention, a weight is attached to the lower ends of the shutter curtain and the two doors, and the weights of the lower ends of the two doors are connected to the weight of the lower end of the shutter curtain by a universal joint. It is characterized by having. In the third invention, the upper ends of the two doors are
According to a fourth aspect of the present invention, a mechanism is provided for fixing a weight at the lower end of the two doors to a weight at the lower end of the shutter curtain.

According to a fifth aspect of the present invention, the side ends of the two doors constituting the evacuation opening are overlapped with the side ends of the adjacent fire-resistant sheets. A cover made of a fire-resistant sheet similar to a curtain is formed so as to cover side ends of two doors constituting an evacuation opening, and the cover regulates opening and closing of the door, and the regulation is performed at a lower end than an upper end of the door. Is weak.

[0012]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory front view showing a fireproof and smokeproof shutter provided with an escape opening according to the present invention, FIG. 2 is an explanatory view of the fireproof and smokeproof shutter, and FIG. FIG. 2 (b) is a plan view of the same, FIG. 3 is a front view of the fire and smoke prevention shutter showing the open state of the evacuation opening, and FIG. 4 omits the engagement member and the engagement member of the door. FIG. 5 is a cross-sectional view for explaining the engagement state of the weight of the shutter curtain,
FIG. 5B is an explanatory cross-sectional view showing the open / closed state of the shutter curtain, and FIG.
6B is an explanatory cross-sectional view showing the open state, FIG. 6 is an explanatory view showing an attached state of the foot plate, and FIG. 6A is an explanatory view showing the attached state at the time of closing, and FIG. ) Is an explanatory view showing an attached state at the time of opening, FIG. 7 is a front view for explanation showing a fireproof and smokeproof shutter according to the present invention provided with a cover, and FIG. 8 is an open state of an escape opening of the fireproof and smokeproof shutter. FIG. 9 is an explanatory sectional view showing the relationship between the door and the cover.

In FIG. 1 to FIG. 3, a shutter curtain 1 constituting a fireproof and smokeproof shutter includes a fireproof sheet 2.
a door 3 comprising a, 2b and a fire-resistant sheet disposed in the middle part
a and 3b. However, the number of the refractory sheets 2a and 2b is not limited to two, but may be plural.

The doors 3a and 3b composed of the refractory sheets 2a and 2b and the refractory sheet are selected from silica cloth, glass cloth, cloth woven with stainless steel wire, cloth made of fibers of other refractory materials, and the like. Can be used.

The doors 3a and 3b are provided side by side in the middle of the refractory sheets 2a and 2b as described above, and constitute evacuation openings 4a and 4b which can pass in both directions.
The door 3a and the adjacent door 3b are connected continuously or by stitching or bonding 5. Further, the side end 6a of the door 3a and the side end 7a of the adjacent refractory sheet 2a
Similarly, the overlapping portion 8a is overlapped with each other, and similarly, the side edge 6b of the door 3b and the side edge 7b of the adjacent refractory sheet 2b are overlapped with each other by the overlapping portion 8b.
There is.

The upper ends 9a and 9b of the refractory sheets 2a and 2b and the upper ends 9c of the doors 3a and 3b are fixed to the shaft 10 and wound. In addition, lower end portions 11 of these refractory sheets 2a, 2b.
a, 11b and the lower ends 11c, 11d of the doors 3a, 3b are free from each other without being connected to each other. For this reason, the door 3a has a one-sided structure in which the door 3b side and the upper end 9c are bound, and the door 3b has the door 3a side and the upper end 9c bound.

At the lower end of the shutter curtain 1, an elongated seat plate 16 serving as a weight 15 is provided. At the time of fire, the shutter curtain 1 is unwound from the state of being wound on the shaft 10 by the weight 15 and descends. The weight 15 has a function of preventing the shutter curtain 1 from rolling up as well as a function as a fire and smoke-proof shutter when the shutter curtain 1 descends.

As described above, the upper ends 9c of the doors 3a, 3b
Are fixed to the shaft 10 and have lower ends 11c, 11c.
The weight d is provided with weights 17a and 17b separated from the weight 15 as shown in FIG. This weight 17a, 1
7b is connected to the weight 15 at the lower end of the shutter curtain by universal joints 18a and 18b. And door 3
FIG. 3 shows the open state of the switches a and 3b. Note that the doors 3a and 3b may be provided with one weight over the lower end portions 11c and 11d.

The weights 17a, 17b are connected to the doors 3a,
The lower end of 3b may be engaged with the weight 10 by fixing means having locking mechanisms 20,20. The lock mechanism 20 is released by stepping on the tread plate 21,
By pushing the doors 3a and 3b forward in this state, the door 3
a, 3b, with the universal joints 18a, 18b as fulcrums,
The weights 17a and 17b can be moved, and the lower end 1
The sides 1c and 11d are largely opened, and evacuation openings 4a and 4b having a one-way structure that can pass in both directions are formed as shown in FIG.

The structure of the lock mechanism 20 will be described with reference to FIG. FIG. 5 is an explanatory cross-sectional view showing an open / closed state of the shutter curtain. FIG. 5 (a) shows a state when the door is closed, and FIG. 5 (b) shows a state when the door is opened. I have. Here, the description will be made based on the lock mechanism 20 provided on the door 3a. At the lower end of the door 3a, the weight 17a
At the same time, an engaging member 25 is attached to the curtain side. This engaging member 25 is an engaging metal fitting having an L-shaped cross section formed by a fixing plate 26 on the outer surface side (evacuation side) of the shutter curtain 1 and an engaging plate 27 moved to the inner surface side (shielding side). 28 and a magnetic plate 29 provided on the opposite side of the fixing plate 26. Further, an engagement hole 30 is formed in the engagement plate 27.

The weight 17a is connected to the weight 1 as described above.
5 is engaged. That is, the weight 15 shown in FIG.
The shutter curtain 1 includes a seat plate 16 erected on the floor surface Y when the shutter curtain 1 descends, a locking member 40 and the like. The weight 15 is provided over the entire lower end of the shutter curtain 1 in the longitudinal direction, and engages with the weight 17a at the door 3a. The seat plate 16 is formed of a metal flat bar or the like having a rectangular cross section.
A magnetic plate 33 that is attached to a magnetic plate 29 attached to the lower end of the door 3a is attached.
Although not always necessary, it is preferred.

On the other hand, on the other side of the seat plate 16, there is provided a locking member 40 which engages with the engaging member 25 to keep the weights 15 and 17a locked. The locking member 40 is mounted on the upper portion of the seat plate 16 and has a vertically extending insertion hole 41a. A locking piece 43 is vertically movably inserted into the insertion hole 41a. And a spring 44 interposed between the locking member 42 and the floor surface Y to urge the locking member 42 upward. In addition, 45 is a cover plate of the guide cylinder 41.

The stepping plate 21 is interlocked with the locking fitting 42. More specifically, the stepping plate 21 is attached to the mounting plate 51 so that the locking fitting 42 moves up and down as the stepping plate 21 moves up and down. Foot rest plate 52 that can be bent freely via hinge 53
Are combined. FIGS. 6A and 6B are explanatory views showing a state of attachment of the tread plate 52. FIG. 6A shows the state of attachment when closed, and FIG. 6B shows the state of attachment when opened.

As shown in FIG. 6 (a), the stepping plate 21 in the closed state is such that the mounting plate 51 is inserted between the seat plate 16 and the locking fitting 42, and is inserted into the opening 52a of the footrest plate 52. The protruding portion 35 protruding from the seat plate 16 is locked and is in an upright state. That is, in a state where the shutter curtain 1 is being wound on the shaft 10 or a state where the shutter curtain 1 is being lowered from the shaft 10, the tread plate 21 is
It is hung on.

At the time of opening, the footboard 21 is in a state where a person can step on the footrest 52 on the floor surface Y. At this time, the stopper between the opening 52a and the projection 35 is removed. Also,
The locking fitting 42 in this state is urged upward by a spring 44 and pushed up.

When the shutter curtain 1 is lowered, the magnetic plate 29 at the lower end of the door 3a and the magnetic plate 3
3 are adsorbed. In this state, the engagement plate 27 of the engagement metal fitting 28 of the door 3 a slides over the seat plate 16 and is in sliding contact with the tip end of the locking piece 43 of the locking metal fitting 42, and engages with the engagement hole 30 of the engagement plate 27. The distal end of the stopper 43 is immersed, and the engagement fitting 2
8 and the locking fitting 42 are in a locked state.

To release the locked state, the step plate 2
When 1 is depressed and the foot rest plate 52 is depressed, the stepping plate 21 pushes down the locking fitting 42 due to the applied pressure, the spring 44 is compressed, and the locking piece 43 descends in the insertion hole 41 a of the guide cylinder 41. Therefore, the distal end of the locking piece 43 is disengaged from the engaging hole 30, the weight 17a is disengaged from the weight 15 and the door 3a can be opened, and as shown in FIG. An evacuation opening 4a is formed.

When the door 3a is released after the evacuation opening 4a is opened, the weight 17a returns to its original state with the weight of the universal joint 18 as a fulcrum due to its own weight, and the engagement state between the weight 15 and the weight 17a is restored. The door 3a is locked in a closed state by the lock mechanism 20, so that the fireproof and smokeproof shutter can maintain its shielding property.

Next, the overlapping portion 8a of the side end 6a of the door 3a and the side end 7a of the refractory sheet 2a has
An elongated cover 36 made of a fire-resistant sheet that covers a part of the door 3a including the overlapping portion 8a may be provided. The same applies to the door 3b. Hereinafter, description will be given based on the cover 36 provided on the overlapping portion 8a of the door 3a. The cover 36 regulates the opening and closing of the door, and the regulation is weaker at the lower end than at the upper end of the door. Further, the upper end 36a of the cover 36 is fixed to the shaft 10, and is integrated with the shutter curtain 1 and wound up.

The cover 36 shown in FIGS. 7 and 8 is made of a fire-resistant sheet as described above, and is formed in an elongated tapered shape 36c whose width gradually increases toward the upper end, as shown in FIG. When the door 3a is closed, the cover 36 and the door 3a are closely overlapped with each other, so that a state where the door 3a is sandwiched between the fire-resistant sheet 2a and the cover 36 can be maintained. For this reason, due to wind pressure during a fire,
Hold down the door 3a, which is easy to flip and roll up,
In the closed state of a, a decrease in the shielding performance of the fire and smoke prevention shutter is suppressed.

Further, since the lower end of the cover 36 is formed in a narrow width, when the door 3a is pushed and opened to evacuate as the evacuation opening 4a, the door 3a can be easily opened and the passage of the person is possible. It does not hinder. Further, the door 3a
When the door 3a is automatically closed by the action of the weight 17a as described above after the door 3a is opened and used as the evacuation opening 4a, the cover 36 does not hinder the movement of the door 3a to close.

That is, when the door 3a is about to be automatically closed, the weight 17a moves so as to rotate in the direction opposite to the arrow with the universal joint 18 as a fulcrum. In this case, cover 3
6 is wide, the wide portion is caught between the door 3a and the fireproof sheet 2a, hindering the return movement of the door 3a, the door 3a is opened halfway, and the fire and smoke prevention shutter is opened. Is greatly impaired.

However, since the cover 36 is formed so as to be narrower toward the lower end, the rotation of the weight 17a is not hindered, and the automatic closing movement of the door 3a is smoothly performed. Particularly important is that the cover 36 does not exist on the rotating locus of the weight 17a. Since the door 3a itself is made of a flexible fire-resistant sheet,
The movement of the door 3a is substantially restricted by the movement of the weight 17a.
Therefore, according to the cover 36 having such a configuration, the weight 1
The movement of the door 7a is not directly obstructed, and the opened door 3a is automatically and smoothly closed. Also,
When closed, the cover 36 does not get caught.

When the door 3a is closed, the contact between the refractory sheet of the door 3a and the refractory sheet of the cover 36 proceeds from the upper end to the lower end. At this time, the lower end cover 36
However, the possibility of being caught inside the door 3a increases. However, since the cover 36 is formed to be narrower toward the lower end, the possibility of the cover 36 being caught can be reduced.

As described above, the door 3a is easily closed automatically.
Moreover, a structure having extremely high shielding performance in the closed state of the door 3a can be obtained, and there is no reduction in the shielding performance of the fireproof and smokeproof shutter due to the presence of the door 3a.

Although not shown, the door 3a and the cover 36
In order to enhance the adhesion with the fixing member, fixing means such as a magnet or a hook-and-loop fastener may be provided. The door 3a is configured so that the weight 17a is released from the weight 15 by stepping on the tread plate 21 as the lock mechanism 20,
As a means for fixing the door 3a, a magnet or a hook-and-loop fastener can be used.

Although the shape of the cover 36 is not shown, various shapes such as a curved tapered shape 36c, a shape in which the overlapping area with the door 3a changes stepwise, and a shape obtained by combining these shapes are available in addition to the above shapes. Can be adopted. Further, the change in the overlapping area between the cover 36 and the door 3a is not necessarily limited to a simple increasing or decreasing shape. In other words, if the overlapping area between the cover 36 and the door 3a is relatively small at the lower end portion and the overlapping area between the cover 36 and the door 3a is relatively large at the upper end portion, the present invention may be applied. Can achieve the desired effect.

[0038]

According to the present invention, it is possible to obtain a shutter curtain which can easily form an evacuation opening by opening a door in the event of a fire and has a shielding function required for a fire and smoke prevention shutter.

The effect will be described in detail. The evacuation exit can be passed smoothly, the decrease in the shielding property when the evacuation exit is not used is small, and the evacuation exit is automatically closed after the evacuation exit is used. In addition, a number of effects can be obtained, such as that the entire shutter can be wound and stored with a simple structure.

[Brief description of the drawings]

FIG. 1 is an explanatory front view showing a fireproof and smokeproof shutter provided with an evacuation opening according to the present invention.

FIG. 2A is an explanatory side view of the fireproof and smokeproof shutter. (B) A plan view for the same.

FIG. 3 is an explanatory front view of a fire and smoke prevention shutter showing an open state of an evacuation opening.

FIG. 4 is an explanatory cross-sectional view showing an engagement state of a weight of a shutter curtain in which an engagement member and an engagement member of a door are omitted.

FIG. 5A is an explanatory cross-sectional view showing a closed state of a shutter curtain. (B) An explanatory sectional view showing the open state.

FIG. 6A is an explanatory view showing an attached state when the step board is closed. (B) Explanatory drawing which shows the attached state at the time of the opening.

FIG. 7 is an explanatory front view showing a fireproof and smokeproof shutter according to the present invention provided with a cover.

FIG. 8 is an explanatory front view showing an open state of an evacuation opening of the fire and smoke prevention shutter.

FIG. 9 is an explanatory sectional view showing a relationship between a door and a cover.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shutter curtain 2a, 2b Fireproof sheet 3a, 3b Door 4a, 4b Evacuation exit 6a, 6b Side end of door 7a, 7b Side end of fireproof sheet 10 Shaft 15 Weight 17a, 17b Weight 18 Universal joint

Claims (6)

[Claims] 1. A shutter curtain comprising a fire-resistant sheet, two doors of the fire-resistant sheet are provided side by side, wherein the two doors constitute an adjacent fire-resistant sheet and an evacuation opening, and lower ends of the two doors Is a fireproof and smokeproof shutter, which is connected to a lower end of a shutter curtain by a universal joint. 2. A weight is attached to the lower ends of the shutter curtain and the two doors, and the weight of the lower ends of the two doors is connected to the weight of the lower end of the shutter curtain by a universal joint. The fireproof and smokeproof shutter according to claim 1, characterized in that: 3. The fire and smoke prevention shutter according to claim 1, wherein upper ends of the two doors are fixed. 4. The fireproof and smokeproof shutter according to claim 1, further comprising a mechanism for fixing a weight at a lower end of the two doors to a weight at a lower end of the shutter curtain. 5. The side ends of two doors constituting an evacuation opening,
The fire and smoke prevention shutter according to claim 1, 2, 3 or 4, wherein the side end portions of adjacent fire resistant sheets are overlapped with each other. 6. A cover made of a fire-resistant sheet similar to a shutter curtain is formed so as to cover side ends of two doors constituting an evacuation opening, and the cover regulates opening and closing of the doors, and 6. The fire and smoke prevention shutter according to claim 1, wherein the lower end is weaker than the upper end of the door.