JP3457908B2 - Fire and smoke shutters - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire and smoke prevention shutter formed of a fire resistant sheet, and more particularly, in a fire and smoke prevention shutter formed with an evacuation door used in case of a fire, the shaft is evenly arranged. The present invention relates to a fire and smoke prevention shutter that is wound up.

[0002]

2. Description of the Related Art Fireproof and smokeproof shutters for shielding flames, high-temperature gas, smoke, etc. in the event of a fire are provided in passageways in buildings. Conventionally, as this type of fire and smoke prevention shutter, one using a metal slat is generally known, but recently, a fire and smoke prevention shutter using a fire resistant sheet such as glass cloth or silica cloth. Has been adopted.

A fireproof and smokeproof shutter using a fireproof sheet has the following features. The overall weight is light and easy to install. There is a high degree of freedom in choosing the construction site. The volume occupied in the stored state is small.
Being able to easily obtain a large area. Highly consistent with the design inside the building.

On the other hand, the fire and smoke prevention shutter requires an evacuation exit (emergency exit) through which a person who has escaped late can pass. We have proposed a fire and smoke prevention shutter equipped with an evacuation exit that has a structure that achieves both the required shielding function.

The fire and smoke prevention shutter provided with the evacuation opening of the structure proposed by the applicant of the present invention will be described with reference to FIGS. 6 to 8. The shutter curtain 1 constituting this fire and smoke prevention shutter has a plurality of fire resistant sheets 2a and 2a.
, and a door 4 of a fire-resistant sheet which is an evacuation opening 3 arranged between the fire-resistant sheets 2a and 2b. These fire resistant sheets 2a, 2b, 2
The c, ... And the door 4 are configured such that the upper end is fixed to the shaft 5 and is wound up when not in use.

More specifically, as shown in the drawing, the fire-resistant sheet 2a, the door 4 and the fire-resistant sheets 2b, 2 which are adjacent to each other.
The respective side ends 6a of c are connected by a joint 7a such as stitching or bonding. Further, as shown in FIG. 7, both end portions 6a, 6 of the door 4 and the fire resistant sheet 2b are
b is an overlapping portion 8 that is superposed on each other.

Further, an elongated cover 9 made of a fireproof sheet covering about half of the fireproof sheet 2b and the side edge portion 6b of the door 4 including the overlapping portion 8 has a side edge portion on the fireproof sheet 2b. 9a is provided in a one-sided structure by joining 7b such as stitching and adhering. In the figure, 10 is an elongated seat plate 1 provided at the lower end of the shutter curtain 1.
The shutter curtain 1 is unwound from the state wound on the shaft 5 by the weight 10 and descends when a fire occurs. A weight 12 separated from the weight 10 is attached to the lower end of the door 4, and the weight 12 is attached to the weight 10 by a universal joint 13.
Is combined with. And a detailed explanation will be given later,
The weight 12 of the door 4 is engaged with the weight 10 by a fixing means having a fireproof surface fastener or a locking mechanism.

[0008]

By the way, in the fire and smoke prevention shutter provided with the door 4 of the above-mentioned single-opening structure, the door 4 is opened by pushing the door 4 portion forward by releasing the lock mechanism in the event of a fire. By moving the weight 12 with the universal joint 13 as a fulcrum, the lower end side of the door 4 is largely opened, and the evacuation opening 3 having a one-sided opening structure is formed as shown in FIG.

For this reason, the evacuation opening 3 having a single-open structure has the following effects. Evacuees should be able to pass through the evacuation gate 3 smoothly. When the evacuation opening 3 is not used, the evacuation opening 3 portion is provided with the overlapping portion 8 in which the door 4 and the both end portions 6a and 6b of the fire resistant sheet 2b are overlapped with each other as described above, and the cover 9 is provided. However, the structure is such that the overlapping portion 8 is covered, and the deterioration of the shielding property is small. The evacuation opening 3 should be automatically closed after use by the action of the weight 12. The entire shutter curtain 1 can be wound up on the shaft 5 and stored upward with a simple structure.

However, the evacuation opening 3 of this one-sided structure
In the fire and smoke prevention shutter provided with, the overlapping portion 8 that constitutes the evacuation opening 3 has a total of 3 in which the side end portion 6b of the door 4, the side end portion 6a of the fire resistant sheet 2b and the cover 9 are overlapped as described above. It becomes the thickness of the sheet.

Therefore, when the shutter curtain 1 is wound around the shaft 5, the overlapping portion 8 swells, its diameter gradually increases, the thickness increases, and winding deviation occurs, making uniform winding difficult. Furthermore, this overlapping part 8
The force concentrates on the part, and the fire-resistant sheet in the concentrated part stretches or breaks, which causes inconvenience. The overlapping portion 8
Is the side end 6b of the door 4 and the side end 6a of the fire resistant sheet 2b.
Door 4 and cover 9 are overlapped without overlapping
The same inconvenience also occurs when it is configured in the overlapping portion of the sheets. This problem occurs even when the door has a structure other than the single-sided opening, when there is an overlapping portion of the fire resistant sheets.

In order to solve the above problems, the present invention provides
In a fire and smoke prevention shutter equipped with a door that serves as an evacuation door in the event of a fire, we provide a fire and smoke prevention shutter that prevents the winding misalignment caused by the overlapping part of this door to be wound evenly on the shaft. The purpose is to do.

According to a first aspect of the present invention, an evacuation door is formed on a fire and smoke prevention shutter made of a fire resistant sheet,
The door is a side edge of the door and a side edge of the fire-resistant sheet and this.
There are a total of three overlapping fireproof sheets with overlapping covers, and thickness adjustment sheets are attached to multiple locations of the fire and smoke prevention shutters according to the thickness of the fireproof sheets at the overlapped portions. is it characterized by that, the second
In the invention of, the width of the cover gradually increases toward the upper end.
It is characterized by being formed in an elongated taper shape.
I am doing .

A third aspect of the invention is characterized in that the thickness of the portion to which the thickness adjusting sheet is attached is equal to or thicker than the thickness of the overlapping portion of the refractory sheet of the escape door. Is characterized in that the fire and smoke prevention shutter is constructed by joining a plurality of fire resistant sheets, and the thickness adjusting sheet is attached to the joining portion.

[0015]

According to the first aspect of the present invention, in the fire and smoke prevention shutter, the overlapping portion of the fire resistant sheet on which the door is formed and the plurality of thicknesses of the thickness adjusting sheet corresponding thereto are provided. Since it is provided, the force concentrated on the overlapping portion of the fire resistant sheet is dispersed, and the fire and smoke prevention shutter can be wound evenly on the shaft. Further, similarly, since the concentrated force is dispersed, it is possible to eliminate the inconvenience that the fire resistant sheet in the thick portion is stretched or torn.

According to the second invention, the cover faces the upper end.
Formed into a slender taper shape whose width gradually expands as it goes away
Therefore, when the door is closed, the cover and the door are
And the door is sandwiched between the fireproof sheet and the cover.
It can be maintained by a wind pressure etc.
Hold the door that is easy to roll up
Reduces the shielding performance of the fire and smoke prevention shutter in the closed state.
It's suppressed. This cover has a narrow bottom edge.
Since it is open, push the door to open it,
When it is difficult, if the door is easy to open, and
Absent.

According to the third aspect of the invention, since the force is distributed to the portion to which the thickness adjusting sheet is attached, the cover wound together with the evacuation door is wrinkled or twisted. You can achieve uniform winding on the shaft while maintaining the correct posture. Further, according to the fourth invention,
The thickness adjusting sheet can be easily attached by using the joint portion of the fire resistant sheet as a mark. In addition, the joint portion of the fire resistant sheet is reinforced.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. 1 is a schematic front view showing a fire and smoke prevention shutter provided with an evacuation opening according to the present invention, FIG. 2 is a schematic plan view of the same, FIG. 3 is a schematic explanatory view showing a winding state, and FIG.
FIG. 5 is an explanatory sectional view showing the opened / closed state of the shutter curtain, and FIG. 5 is an explanatory view showing the attached state of the footboard.

Since the basic structure of the fire and smoke prevention shutter according to the present invention is the same as that of the conventional fire and smoke prevention shutter described above, the same structures will be described with the same reference numerals.

The fire and smoke prevention shutter of the present invention is a shutter curtain 1 provided with a door 4 for the evacuation opening 3 having the above-mentioned one-sided opening structure, and the fire resistant sheets 2 adjacent to each other.
The gist is a structure in which a thickness adjusting sheet 7c is attached to a joint portion 7a of a, 2b, 2c, ....

That is, each of the refractory sheets 2a, 2b, 2c,
Using the joint portion 7a as a mark, a thickness adjusting sheet 7c having a predetermined width is attached along the joint portion 7a by a known means such as stitching or bonding. The thickness of this attachment portion is preferably equal to or thicker than the thickness of the overlapping portion 8 of the refractory sheet in the door 4 portion of the evacuation opening 3 described above.

The material for the thickness adjusting sheet 7c is the same as the fire resistant sheets 2a, 2b, ..., The door 4 and the cover 9, silica cloth, glass cloth, cloth knitted with stainless steel wire, and fibers of other fire resistant materials. It is preferable to use a cloth selected from the cloth and the like.

Although not shown, the cover 9 has various shapes such as a curved taper shape, a shape in which the overlapping area with the door 4 changes stepwise, and a combination of these shapes, in addition to the above shapes. can do. Also, the cover 9
The change in the overlapping area between the door 4 and the door 4 is not necessarily limited to a simple increasing or decreasing shape. In other words, the cover 9 has a relatively small overlapping area at the lower end, and the cover 9 has a relatively large overlapping area at the upper end if the cover 9 has a large overlapping area. The desired effect can be obtained.

In the fire and smoke prevention shutter having the above structure,
The lock mechanism 14, which will be described next, is released, and the door 4 is pushed forward to move the weight 12 around the universal joint 13 as a fulcrum, so that the lower end side of the door 4 is largely opened, as shown in FIG. Thus, the evacuation opening 3 having a one-sided structure is formed.

That is, the lock mechanism 14 includes
It is released by stepping on, and after opening the evacuation gate 3,
When the door 4 is released, the weight 12 returns to its original state with the universal joint 13 as a fulcrum and the combined state of the weight 10 and the weight 12 is restored, and the door 4 is locked by the locking mechanism 14. Thus, the shielding property of the fire and smoke prevention shutter is maintained.

The structure of the lock mechanism 14 will be described with reference to FIG. FIG. 4 is an explanatory cross-sectional view showing the opened / closed state of the shutter curtain, FIG. 4 (a) shows the state when the door is closed, and FIG. 4 (b) shows the state when the door is open. There is. An engaging member 20 is attached to the shutter curtain 1 side together with the weight 12 at the lower end of the door 4. This engagement member 20 is an engagement fitting having an L-shaped cross section formed by a fixing plate 23 on the outer surface side (evacuation side) of the shutter curtain 1 and an engagement plate 22 that is moved to the inner surface side (shielding side). 21 and a magnet plate 25 attached to the opposite side of the fixed plate 23. This engaging plate 22 has an engaging hole 2
4 has been opened.

The weight 12 is the weight 10 as described above.
Is engaged with. That is, the weight 10 is configured by the seat plate 11 and the locking member 40 which are erected on the floor surface Y when the shutter curtain 1 descends. And the weight 10
Are provided on the entire lower end portion of the shutter curtain 1 in the longitudinal direction, and are configured to engage with the weight 12 in the door 4. The seat plate 11 is formed of a metal flat bar or the like having a rectangular cross section, and a magnetic plate 31 that is attracted to the magnetic plate 25 attached to the lower end of the shutter curtain 1 is attached to one side surface thereof. But this magnetic plate 3
1 is not always necessary, but is preferable.

On the other hand, on the other side surface of the seat plate 11, there is provided an engaging member 40 which engages with the engaging member 20 and keeps the weights 10 and 12 in a locked state. Engaging member 40
Is a guide cylinder 41 that is attached to the upper portion of the seat plate 11 and has an insertion hole 41a formed in the vertical direction, and an insertion hole 41.
The locking piece 42 through which the locking piece 43 is vertically movable with respect to a, and the spring 44 that is interposed between the locking piece 42 and the floor surface Y to urge the locking piece 42 upward. It is formed by and. In the figure, 45 is a guide bar plate of the guide cylinder 41.

The tread plate 15 is interlocked with the locking metal fitting 42. More specifically, the tread plate 15 is attached to the mounting plate 51 so that the locking metal fitting 42 moves up and down as the tread plate 15 moves up and down. A footrest plate 52 that can be freely bent via a hinge 53
Are combined. 5A and 5B are explanatory views showing the mounting state of the footrest plate 52, FIG. 5A shows the mounting state when closed, and FIG. 5B shows the mounting state when open. .

As shown in FIG. 5 (a), when the foot plate 15 is closed, the mounting plate 51 is inserted between the seat plate 11 and the locking metal fitting 42, and the foot plate 15 is opened in the opening 52a. The projection 32 protruding from the seat plate 11 is hooked and is in a standing state. That is, when the shutter curtain 1 is wound on the shaft 5 or is being lowered from the shaft 5, the step plate 15 is locked to the seat plate 11.

Further, when opened, the footrest plate 52 is in a state in which a person can step on the floor surface Y. At this time, the latch between the opening 52a and the protrusion 32 is removed. The locking fitting 42 in this state is urged upward by the 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 to each other. In this state,
Engagement plate 2 in engagement fitting 21 of shutter curtain 1
2 is slidably contacted with the tip of the locking piece 43 of the locking metal fitting 42 beyond the seat plate 11, and is locked in the engaging hole 24 of the engaging plate 22.
The tip end of is engaged and the engagement fitting 21 and the engagement fitting 42 are in a locked state.

To release the locked state, the footboard 15 is tilted and the footboard 15 is stepped on. When the footboard 15 is depressed, the footboard 15 pushes down the locking metal fitting 42 by the applied heavy pressure, the spring 44 is compressed, and the locking piece 43 is released. The inside of the insertion hole 41a of the guide cylinder 41 is lowered. Therefore, the tip end of the locking piece 43 is disengaged from the engagement hole 24, the weight 12 is released from the engagement state with the weight 10, the door 4 can be opened, and the one-sided opening structure as shown in FIG. The evacuation gate 3 is formed.

The cover 9 used in the present invention is formed in an elongated taper shape whose width gradually increases toward the upper end as described above. Therefore, when the door 4 is closed, the cover 9 and the door 4 can be closely overlapped with each other, and the door 4 can be kept in a state of being sandwiched between the fire-resistant sheet 2b and the cover 9, and when a fire occurs, the pressure can be increased by the wind pressure or the like. The door 4 that is easy to rise is pressed down to suppress the deterioration of the shielding property of the fire and smoke prevention shutter when the door 4 is closed. Since this cover 9 is formed with a narrow width at the lower end side, when the person pushes the door 4 to open it and evacuates as the evacuation opening 3, the door 4 is easy to open and does not hinder the passage of people. is there.

Furthermore, after the door 4 is opened and used as the evacuation opening 3, when the door 4 is automatically closed by the action of the weight 12 as described above, the cover 9 tries to close the door 4. It does not hinder movement. Further, since the cover 9 is formed so as to be narrower toward the lower end side, the weight 12
The automatic closing movement of the door 4 is
It is done smoothly.

Although not shown, in order to improve the adhesion between the door 4 and the cover 9, a fixing means such as a magnet or a surface fastener may be provided together. Further, the door 4 has a lock mechanism 14
As a result of stepping on the tread plate 15, the weight 12
However, as the fixing means for the door 4, a magnet or a surface fastener can be used. In particular, the structure using the metal surface fastener is a reliable structure for fixing the door even though the structure is simple.

[0037]

According to the present invention, the fire and smoke preventive shutter is provided with the overlapping portion of the fire resistant sheet on which the door is formed and the plurality of thicknesses corresponding to the thickness adjusting sheet. Therefore, the force concentrated on the overlapping part of the fire resistant sheet is dispersed, and the fire and smoke prevention shutter has no winding deviation,
It is evenly wound around the shaft. Further, this dispersing action eliminates the inconvenience that the fire-resistant sheet in the thick portion is stretched or torn.

Further, due to the above dispersing action, the cover that is wound up together with the evacuation door is uniformly wound around the shaft while maintaining a correct posture without wrinkles or twisting. In addition, the thickness adjusting sheet has a simple structure that can be attached by using the joining portion of the fire resistant sheet as a mark, and the thickness adjusting sheet has a simple structure and can be economically provided at low cost.

[Brief description of drawings]

FIG. 1 is a schematic front view showing a fire and smoke prevention shutter provided with an evacuation opening according to the present invention.

FIG. 2 is a schematic plan view of the same.

FIG. 3 is a schematic explanatory view showing the winding state.

FIG. 4 is an explanatory sectional view showing an opened / closed state of a shutter curtain.

FIG. 5 is an explanatory diagram showing a mounting state of a footboard.

FIG. 6 is a schematic front view showing a conventional fire and smoke prevention shutter.

FIG. 7 is an enlarged explanatory sectional view showing the same overlapping portion.

FIG. 8 is a schematic explanatory view showing the winding state.

[Explanation of symbols]

1 shutter curtain 2a, 2b Fire resistant sheet 3 evacuation gates 4 doors 7a Joining 7c Thickness adjustment sheet 8 overlapping parts

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-10-211295 (JP, A) JP-A-10-317846 (JP, A) JP-A-8-209085 (JP, A) JP-A-10- 155925 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) E06B 9/00

Claims (4)

(57) [Claims] 1. An evacuation door is formed on a fireproof and smokeproof shutter made of a fireproof sheet, and the door is provided with a side end portion and a fireproof door.
The side edges of the flammable sheet and the cover covering them overlap
In addition, the fireproof smokeproof shutter has a thickness adjusting sheet attached at a plurality of positions corresponding to the thickness of the fireproof sheet in the overlapped portion. Fire and smoke shutter. 2. The width of the cover gradually increases toward the upper end.
It is characterized by being formed in a slender taper shape that spreads out.
The fire and smoke prevention shutter according to claim 1, which is a characteristic. 3. The fire protection system according to claim 1, wherein the thickness of the portion to which the thickness adjusting sheet is attached is equal to or thicker than the thickness of the overlapping portion of the fireproof sheet of the escape door. Smokeproof shutter. 4. The fire and smoke prevention shutter is configured by connecting a plurality of fire resistant sheets, and the thickness adjusting sheet is
The fire and smoke prevention shutter according to any one of claims 1 to 3, wherein the fire and smoke prevention shutter is attached to the joining portion.