JP2000274158A - Fire and smoke preventive shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire and smoke preventive shutter in which the facility of passage in an evacuation port and a shielding function required for the shutter are made compatible. SOLUTION: In the fire and smoke preventive shutter, the door 3 of a fire- resistive sheet is installed to a shutter curtain 1 composed of the fire-resistive sheets 2a, 2b, one side end section 3a of the door 3 is continued or connected to the adjacent fire-resistive sheet 2a, weights 10, 12 are mounted at the lower end sections of the shutter curtain 1 and the door 3, and the weight 12 at the lower end section 3d of the door 3 is bonded with the lower end section 2b of the sheet 2a by a universal joint 13.

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:
A shutter curtain made of a fire-resistant sheet is provided with a door of a fire-resistant sheet, one side end of the door is connected or connected to an adjacent fire-resistant sheet, and a lower end of the door is connected to the door of the door. It is characterized in that it is connected to the lower end portion of the adjacent refractory sheet by a universal joint.

According to a second aspect of the present invention, a weight is attached to a lower end portion of the shutter curtain and the door, and a weight of the lower end portion of the door is connected to a lower end portion of the refractory sheet adjacent to the door by continuous or connected with the door. It is characterized by being connected by a universal joint. The third invention is characterized in that the upper end of the door is fixed, and the fourth invention is provided with a mechanism in which the weight of the lower end of the door is fixed to the weight of the lower end of the shutter curtain. It is a feature.

A fifth invention is characterized in that the side end of the other door which is not continuous or connected to the adjacent fire-resistant sheet is overlapped with the side end of the adjacent fire-resistant sheet, In a sixth aspect, a cover made of a fire-resistant sheet similar to a shutter curtain is formed so as to cover a side end of the other door that is not continuous or connected to an adjacent fire-resistant sheet, and the cover is a door. Opening and closing of the door, wherein the lower end is weaker than the upper end of the door.

[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 evacuation opening according to the present invention, FIG. 2 is a side view for the same, and FIG. 3 omits an engagement member and an engagement member of a door. FIG. 4 is an explanatory cross-sectional view showing the engagement state of the weight of the shutter curtain, FIG. 4 is an explanatory cross-sectional view showing the relationship between the door and the cover, and FIG. 5 is a front view of the fireproof and smokeproof shutter showing the open state of the evacuation exit. FIGS. 6 and 7 are explanatory sectional views showing the open / closed state of the shutter curtain, and FIG. 7 is an explanatory view showing the attached state of the foot plate.

In FIG. 1 and FIG. 2, a shutter curtain 1 constituting a fireproof and smokeproof shutter includes a fireproof sheet 2.
a, 2b and a door 3 made of a fire-resistant sheet disposed in an intermediate portion. However, the refractory sheets 2a, 2b
Is not limited to two, but can be composed of a plurality of sheets.

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

The door 3 is made of the refractory sheet 2 as described above.
a, 2b, which constitutes the evacuation opening 4 and which is adjacent to the one side end 3a of the door 3
Is continuous or stitched or glued 5
The other side end 3b of the door 3 and the side end 2d of the adjacent refractory sheet 2b are connected to each other as an overlapping portion 6 which is overlapped with each other.

The upper ends 2e, 2e, 3c of the fire-resistant sheets 2a, 2b and the door 3 are connected to a shaft 7
It is constituted so that it may be fixed and wound up. Further, the fire-resistant sheets 2a and 2b and the lower end 2
Since f, 2g, and 3d are not connected to each other and are in a free state, the door 3 has a one-sided structure in which the side end 3a and the upper end 3c of the fire-resistant sheet 2a are bound. ing.

At the lower end of the shutter curtain 1, an elongated seat plate 11 serving as a weight 10 is provided. At the time of fire, the shutter curtain 1 is unwound from the state of being wound on the shaft 7 by the weight 10 and descends. The weight 10 has a function of preventing the shutter curtain 1 from rolling up and the like as well as a function as a fireproof and smokeproof shutter when the shutter curtain 1 descends.

As described above, the upper end 3c of the door 3 is fixed to the shaft 7, and the lower end 3d is provided with the weight 12 separated from the weight 10 as shown in FIG. The weight 12 is connected to a lower end 2 f of the fire-resistant sheet 2 a on the side end 2 c side by a universal joint 13, and is engaged with the weight 10 at both lower ends of the door 3 by fixing means having a lock mechanism 14. ing.

The lock mechanism 14 is released by stepping on the tread plate 15, and in this state, the door 3 is pushed forward, so that the door 3 is supported by the universal joint 13 as a fulcrum.
2 can be moved, the lower end 3d side is largely opened, and an evacuation opening 4 having a single-opening structure is formed as shown in FIG.

The structure of the lock mechanism 14 will be described with reference to FIG. 6A and 6B are explanatory cross-sectional views illustrating the open / closed state of the shutter curtain. FIG. 6A illustrates a state when the door is closed, and FIG. 6B illustrates a state when the door is opened. I have. An engaging member 20 is attached to the lower end of the door 3 together with the weight 12 on the curtain side. The engaging member 20 includes a fixing plate 23 on the outer surface side (evacuation side) of the shutter curtain 1,
It is formed by an engagement metal fitting 21 having an L-shaped cross section formed by an engagement plate 22 that is moved to the inner surface side (shielding side), and a magnetic plate 25 attached to the opposite side of the fixing plate 23. The engagement plate 22 is provided with an engagement hole 24.

The weight 12 is connected to the weight 10 as described above.
Is engaged. That is, the weight 10 shown in FIG. 6 includes the seat plate 11 erected on the floor Y when the shutter curtain 1 descends, the locking member 40, and the like. The weight 10 is provided on the entire lower end of the shutter curtain 1 in the longitudinal direction, and engages with the weight 12 at the door 3. The seat plate 11 is formed of a metal flat bar or the like having a rectangular cross section, and a magnetic plate 31 which is attached to a magnetic plate 25 attached to a lower end portion of the shutter curtain 1 is attached to one side surface thereof. The magnetic plate 31 is not always necessary, but is preferable.

On the other hand, on the other side surface of the seat plate 11, there is provided a locking member 40 which engages with the engaging member 20 to keep the weights 10 and 12 locked. Locking member 40
A guide cylinder 41 attached to an upper portion of the seat plate 11 and having an insertion hole 41a formed in a vertical direction;
a locking piece 42 through which a locking piece 43 is inserted so as to be vertically movable with respect to a, and a spring 44 interposed between the locking piece 42 and the floor surface Y to urge the locking piece 42 upward. Is formed. In addition, 45 is a cover plate of the guide cylinder 41.

The stepping plate 15 is linked to the locking metal member 42. More specifically, the stepping plate 15 is attached to the mounting plate 51 so that the locking metal member 42 moves up and down as the stepping plate 15 moves up and down. Foot rest plate 52 that can be bent freely via hinge 53
Are combined. FIGS. 7A and 7B are explanatory views showing a mounting state of the footboard. FIG. 7A shows a mounting state at the time of closing, and FIG. 7B shows a mounting state at the time of opening.

As shown in FIG. 7 (a), when the foot plate 15 is closed, the mounting plate 51 is inserted between the seat plate 11 and the locking member 42, and the opening 52a of the foot plate 52 is closed. The protruding portion 32 protruding from the seat plate 11 is hung and is in an upright state. That is, in a state where the shutter curtain 1 is wound around the shaft 7 or in a state where the shutter curtain 1 is being lowered from the shaft 7, the tread plate 15 is locked on the seat plate 11.

At the time of opening, the foot rest plate 52 is in a state where a person can step on the foot rest plate 52 on the floor surface Y. On this occasion,
The latch between the opening 52a and the projection 32 is removed. In this state, the locking fitting 42 is urged upward by a spring 44 and pushed up.

When the shutter curtain 1 is lowered, the magnetic plate 25 at the lower end of the shutter curtain 1 and the magnetic plate 31 of the seat plate 11 are attracted. In this state,
Engagement plate 2 in engagement fitting 21 of shutter curtain 1
2 is slidably in contact with the tip of the locking piece 43 of the locking metal fitting 42 beyond the seat plate 11, and is inserted into the engaging hole 24 of the engaging plate 22.
Is immersed, and the engagement fitting 21 and the locking fitting 42 are locked.

To release this locked state, the foot plate 15 is tilted down and the foot plate 52 is depressed. When the applied pressure exerts pressure on the foot plate 15, the locking metal fitting 42 is pushed down, the spring 44 is compressed, and the locking piece 43 is formed. Descends through the insertion hole 41a of the guide cylinder 41. For this reason, the tip end of the locking piece 43 is disengaged from the engaging hole 24, the weight 12 is released from the engagement with the weight 10, and the door 3 can be opened. As shown in FIG. An evacuation opening 4 is formed.

When the door 3 is released after the evacuation opening 4 is opened, the weight 12 returns to its original state with the universal joint 13 as a fulcrum due to its own weight, and the engagement between the weight 10 and the weight 12 is restored. The door 3 is locked in the closed state by the lock mechanism 14, so that the fireproof and smokeproof shutter can maintain the shielding property.

The overlapping portion 6 of the side end 3b of the door 3 and the side end 2d of the refractory sheet 2b is made of a fire-resistant sheet covering a part of the door 3 including the overlapping portion 6. An elongated cover 17 is provided. This cover 17
Regulates the opening and closing of the door, and the regulation is such that the lower end is weaker than the upper end of the door. Further, the upper end portion 17a of the cover 17 is fixed to the shaft 7, and is integrated with the shutter curtain 1 and wound up.

The cover 17 shown in FIGS. 1 and 5 is made of a refractory sheet as described above, and is formed in an elongated tapered shape 17c whose width gradually increases toward the upper end, as shown in FIG. When the door 3 is closed, the cover 17 and the door 3 overlap closely, and the door 3 is
It is possible to maintain a state of being sandwiched between the cover b and the cover 17. For this reason, in the event of a fire, the door 3, which tends to flutter or roll up, is pressed down by wind pressure or the like, thereby suppressing a decrease in the shielding performance of the fire and smoke prevention shutter when the door 3 is closed.

Since the lower end of the cover 17 is formed to be narrow, the door 3 is pushed open to open the evacuation opening 4.
When a person evacuates, the door 3 is easy to open and does not hinder the passage of the person. Further, after the door 3 is opened and used as the evacuation exit 4, the weight 1 is used as described above.
When the door 3 automatically closes due to the action of 2, the cover 17 does not hinder the closing movement of the door 3.

That is, when the door 3 attempts to close automatically,
The weight 12 moves so as to rotate in the direction opposite to the arrow with the universal joint 13 as a fulcrum. In this case, if the lower end of the cover 17 is wide, the wide portion is caught between the door 3 and the fire-resistant sheet 2b, so that the return movement of the door 3 is obstructed, and the door 3 is opened halfway. The shielding of the fire and smoke shutter is greatly impaired.

However, since the cover 17 is formed so as to be narrower toward the lower end, the rotational movement of the weight 12 is not hindered, and the automatic closing movement of the door 3 is smoothly performed. What is particularly important is that the cover 17 does not exist on the rotating trajectory of the weight 12. Since the door 3 itself is formed of a flexible fire-resistant sheet, the movement of the door 3 is substantially restricted by the movement of the weight 12. Therefore, according to the cover 17 having such a configuration, the movement of the weight 12 is not directly obstructed, and the opened door 3 is automatically and smoothly closed. When the cover 17 is closed,
Is no longer involved.

When the door 3 is closed, the contact between the refractory sheet of the door 3 and the refractory sheet of the cover 17 proceeds from the upper end to the lower end. At this time, the possibility that the cover 17 gets caught inside the door 3 becomes higher toward the lower end. However, since the cover 17 is formed to be narrower toward the lower end, the possibility of the cover 17 being caught can be reduced.

As described above, it is possible to obtain a structure in which the door 3 is easily closed automatically and the shielding property in the closed state of the door 3 is extremely high, and there is no decrease in the shielding property of the fireproof and smokeproof shutter due to the presence of the door 3. .

Although not shown, fixing means such as a magnet or a hook-and-loop fastener may be provided in order to enhance the adhesion between the door 3 and the cover 17. The door 3 is provided with a lock mechanism 1.
As step 4, the weight 1 is obtained by stepping on the tread plate 15.
Although 2 is configured to be released from the weight 10, a magnet or a hook-and-loop fastener can be used as a means for fixing the door 3.

Although the shape of the cover 17 is not shown, various shapes such as a curved tapered shape 17c, a shape in which the overlapping area with the door 3 changes stepwise, and a shape obtained by combining these shapes are available in addition to the above shapes. Can be adopted. Also,
The change in the overlapping area between the cover 17 and the door 3 is not necessarily limited to a simple increasing or decreasing shape. In other words, as long as the overlapping area between the cover 17 and the door 3 is relatively small at the lower end portion and the overlapping area between the cover 17 and the door 3 is relatively large at the upper end portion, the present invention is applicable. Can achieve the desired effect.

Although not shown, two doors 3 can be provided side by side, and two evacuation openings 4 that can pass in both directions can be formed. In this case, one door 3 may have the above-described one-sided structure with the adjacent refractory sheet 2a, and the other door 3 may have the above-described one-sided structure like the adjacent fire-resistant sheet 2b. Means disclosed in the present invention, such as a configuration in which an inverted trapezoidal cover 17 is overlapped on the matching doors 3, 3, may be appropriately adopted.

[0039]

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 of the present invention 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 using the evacuation exit. There are a number of effects such as that the shutter can be wound up 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. 2 is a side view for the explanation.

FIG. 3 is an explanatory 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. 4 is an explanatory sectional view showing a relationship between a door and a cover.

FIG. 5 is an explanatory front view of a fireproof and smokeproof shutter showing an open state of an evacuation opening.

FIG. 6 is an explanatory sectional view showing an open / closed state of a shutter curtain.

FIG. 7 is an explanatory view showing an attached state of a foot plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shutter curtain 2a, 2b Fireproof sheet 3 Door 3b Side end of door 17 Cover

Claims (6)

[Claims] 1. A door for a fire-resistant sheet is provided on a shutter curtain made of a fire-resistant sheet, and one side end of the door is continuous or connected to an adjacent fire-resistant sheet, and a lower end of the door is The fire and smoke shutter according to claim 1, wherein the door is connected to a lower end portion of the adjacent refractory sheet continuously or connected by a universal joint. 2. A weight is attached to a lower end portion of the shutter curtain and the door, and the weight of the lower end portion of the door is connected to a lower end portion of a refractory sheet adjacent to the door by connecting or connecting the door by a universal joint. The fire and smoke prevention shutter according to claim 1, wherein the shutter is provided. 3. The fire and smoke prevention shutter according to claim 1, wherein an upper end of the door is fixed. 4. The fire and smoke prevention shutter according to claim 1, further comprising a mechanism for fixing a weight at a lower end of the door to a weight at a lower end of the shutter curtain. 5. The side door of the other door which is not continuous or connected with the adjacent fire-resistant sheet is overlapped with the side end of the adjacent fire-resistant sheet. 4. The fireproof and smokeproof shutter according to 2, 3 or 4. 6. A cover made of a fire-resistant sheet similar to a shutter curtain is formed so as to cover the side end of the other door that is not continuous or connected to an adjacent fire-resistant sheet, and the cover is formed of a door. The opening and closing are regulated, and the regulation is such that the lower end is weaker than the upper end of the door.
4. The fire and smoke shutter according to 4 or 5.