JP2000197713A - Sheet shutter for fire prevention - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily form an opening for taking shelter at the time of shelter, and also to properly close the opening after the refugees passed through the opening provided to sheets. SOLUTION: A screen 2 for entirely closing an opening part is constituted by two sheet bodies 4, 5 whose end parts in the width direction are mutually overlapped to each other, and a sheet plate 6 is provided to the lower end of the screen 2, and a base plate 9 of a prescribed length extended in the width direction of the opening from the overlapped part is provided to the lower end of the sheet body 5 on one side separately from the sheet plate 6. The base plate 9 is flexible via a plate spring 13 provided to the other end of the base plate in the length direction, and an opening for shelter is formed in the screen 2 by opening at least a part of the sheet body 5 on one side making a door front side of the overlapped part, and the sheet body 5 on one side opened at least a part thereof is returned to its initial position by means of the force of the plate spring 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof seat shutter having an evacuation opening.

[0002]

2. Description of the Related Art A sheet shutter has a lightweight shutter curtain, which is advantageous in a case where a person is pinched by an unexpected accident. Alternatively, adoption of a sheet shutter using a fire-resistant sheet as a fireproof shutter has been studied. It is necessary to secure an opening for evacuation in the fireproof shutter, but as an evacuation opening in the fireproof seat shutter, for example, a sheet-shaped shutter curtain extends upward from the lower end of the shutter curtain. Forming a slit portion, closing the slit portion by superimposing the left and right sheets of the slit portion, and forming an opening for evacuation by turning one of the left and right sheets so as to evacuate I have.

However, since the sheet is flexible, when evacuating from the evacuation opening, one of the flipped sheets catches on the slit, and a through opening is formed between the fire side and the non-fire side. There was a fear that it would. In order to fulfill the essential role of the fire prevention shutter, it is necessary to avoid the formation of openings and gaps that are disadvantageous in fire prevention and smoke prevention after evacuation.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve such a problem, and an evacuation opening can be easily formed at the time of evacuation.
It is an object of the present invention to provide a fireproof seat shutter that can satisfactorily close the opening after the evacuee passes through the opening provided in the seat.

[0005]

Means for Solving the Problems In order to achieve the above object, the technical means adopted by the present invention is to provide a screen which descends from above a predetermined portion inside a building to completely close an opening, and which has a widthwise end portion. A screen is provided with a seat plate at the lower end of the screen, and a base plate of a predetermined length extending in the opening width direction from the overlapping portion is provided at the lower end of one of the sheet bodies. The base plate is provided separately from the base plate, one end in the length direction of the base plate is a free end, and the base plate is bendable via a leaf spring provided on the other end in the length direction of the base plate. An opening for evacuation is formed in the screen by opening at least a part of the one sheet body with the polymerization site as a door top side, and the one sheet body opened at least in part is the one sheet body. It is characterized in that the force of the springs so as to return to the polymerization form of the original position.

According to the present invention, the one sheet member and the other sheet member are in a so-called evacuation opening closed state in which the ends are overlapped with each other when the sheet is fully closed. The evacuation opening is formed by at least partially opening the sheet member of the first embodiment, and after evacuation, the one sheet member opened by the force of the leaf spring returns to the evacuation opening closed position. The plurality of sheet members constituting the screen need not necessarily be separate members. A slit having a predetermined size is formed upward from the lower end of one screen, and the left and right sheet members overlap each other at the slit portion. Alternatively, an evacuation opening is provided at the lower end side of the screen, a sheet body is provided on the screen so as to cover the evacuation opening, and the screen body (the other sheet body) and the sheet body (one And those obtained by polymerizing the ends of the sheet with each other.

Preferably, the seat plate includes a flat portion extending substantially over the entire opening width and a rising portion extending in the width direction except for a portion corresponding to the base plate, and one end of the base plate has the other seat member. The base plate is detachably attached to a rising portion at the lower end, and the other end of the base plate is connected to a rising portion at the lower end of one of the sheet members via a leaf spring.

Preferably, a free end on one end side in the length direction of the base plate is detachable from a seat plate at a lower end of the other seat body. The attaching and detaching means for attaching the one end of the base plate to the rising portion of the lower end of the other sheet member preferably magnetizes the two members by providing a magnet on at least one of the opposing surfaces of the two members. More preferably, on one end side of the base plate, a magnetically attached plate having a rising portion and a piece extending horizontally from the lower end of the rising portion is provided, and a rising portion of the seat plate at the lower end of the other seat body is provided. A magnet is provided via a plate member, and one end side of the base plate and a rising portion of the lower end of the other sheet member are detachable via a magnet, and an upper end is inclined at a lower end of the plate member. The guide piece is formed so as to be extended.

Preferably, a cover extension having a downwardly inclined extension is formed at the lower end of the base plate, and the cover extension covers a gap between the base plate and the flat portion of the seat plate. It is characterized by doing so.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a fire-prevention sheet shutter. A wind-up shaft 1 extending in the left-right direction extends above a predetermined fire-prevention section in the building. A guide rail 3 for guiding the left and right ends of the screen 2 made of a refractory sheet is provided upright. A plurality of retaining members 2A are attached to the left and right ends of the screen 2 at predetermined intervals in the height direction. The retaining member 2A has a size larger than the opening groove of the guide rail 3, and by positioning the retaining member 2A in the groove of the guide rail 3, the end of the screen 2 is prevented from coming off from the guide rail 3. Preventing.

The screen 2 is composed of a narrow first sheet member 4 formed by overlapping the widthwise ends thereof, and a wide second sheet member 5. The sheet body 5 is wound around the winding shaft 1 in a state where the width direction ends are superimposed. The screen 2 composed of the first sheet body 4 and the second sheet body 5 is provided with a fire detector (not shown) or Upon detection of a fire by the smoke detector, it descends while being unreeled from the winding shaft 1 and completely closes the opening to partition and shut off the fire side and the non-fire side.

At the lower end of the screen 2 (ie, at the lower ends of the first sheet body 4 and the second sheet body 5), there is provided a seat plate 6 extending over the entire opening width. The seat plate 6 has a substantially inverted T-shaped cross section from the rising portion 7 and the flat portion 8, is connected to the lower end of the seat via the rising portion 7, and the lower surface of the flat portion 8 when the opening is fully closed. Is to come into contact with the floor. The lower ends of the first sheet member 4 and the second sheet member 5 are both attached to the seat plate 6 via the rising portions 7, but the rising portions of the seat plate located at the lower ends of the second sheet members 5 are overlapped portions. It is separated from the flat portion 8 by a predetermined dimension in the width direction from O and forms a base plate 9. That is, in the embodiment, the seat plate 6 is formed by the flat portion 8 extending over the entire opening width and the rising portion 7 formed by cutting out a portion corresponding to the base plate 9. At the lower end of the base plate 9, the lower end of the base plate 9 provided over a predetermined length from the overlapping portion O is independent of the seat plate 6.

FIG. 2 is a plan view of the screen 2 as viewed from above, and arrows indicate possible evacuation directions. The screens 2 overlap each other with the first sheet member 4 on the near side in the evacuation direction (normally considered to be on the fire side) and the second sheet member 5 on the evacuation direction side (normally considered on the non-fire side). It has been installed. The lower end side of the second sheet member 5 is a free end independent of the seat plate 6 by the length having the base plate 9, and the evacuation portion O of the second sheet member 5 is set as the door end side while pushing the overlapping portion side of the second sheet member 5 during evacuation. The two-sheet body 5 is opened to escape.

FIG. 3 shows a seat plate 6 provided at the lower end of the screen 2.
FIG. 3 is a cross-sectional view, a front view, and a vertical cross-sectional view partially showing the base plate 9 and a base plate 9. FIG. 4 shows parts A and B in FIG.
5 is an enlarged view of a portion C and a portion D. FIG.
Part A in FIG. 3, that is, FIG. 4A is a cross-sectional view of the lower end of the first seat body 4, and the seat plate is configured to receive and hold the lower end of the first seat part 4 via the rising part 7. 6 is shown. Part B in FIG. 3, that is, FIG. 4B shows an engagement portion between one end side (door end side) of the base plate 9 at the lower end of the second seat and the rising portion 7 at the lower end of the first seat. 3, that is, FIG. 5A illustrates a cross section of the lower end of the overlapping portion O of the first sheet member 4 and the second sheet member 5. 3 is a cross-sectional view showing the connection between the base plate 9 at the lower end of the second sheet member 5 and the seat plate 6, and only the flat portion 8 of the seat plate 6 is open at this position. It extends in the width direction. 3 is a cross-sectional view of the lower end of the second sheet member 5, and FIG.
The enlarged view is omitted because it is substantially the same as the cross-sectional view shown in FIG. Further, as is apparent from FIG. 3, the base plate 9 has a stepped shape in a plan view on the side of the overlapping portion O, so that the overlapping with the rising portion 7 at the lower end of the first sheet body can be performed well. .

Particularly, as shown in FIGS. 4B and 6, the end of the base plate 9 on the door end side (overlapping portion side) is magnetized with respect to the rising portion 7 of the seat plate at the lower end of the first sheet body 4. It is detachable via 10. Specifically, a magnet 10 is provided on the surface of the rising portion 7 on the first sheet body side via a mounting plate 11.
And a base plate 9 at the lower end of the second sheet body.
Is attached to the magnet 10 on the first sheet body side via a steel magnetized plate 12 provided on the base plate door end side. The lower end of the mounting plate 11 is bent obliquely upward and forms a guide piece 11a extending obliquely upward. The guide piece 11a only needs to be formed at least at the lower end side, and furthermore, as shown in FIG.
b may be formed. The magnetic attachment plate 12 has a substantially L shape in cross section including a rising portion 12a magnetically attached to the magnet 10 and a piece 12b extending horizontally from a lower end of the rising portion 12a.
At the time of engagement between the door end side end of the base plate 9 and the rising portion 7 on the first sheet body side, the extension end of the horizontal extension piece 12b of the magnetic attachment plate 12 is set to the guide piece 11a of the mounting plate 11.
This prevents vertical displacement as much as possible. At the time of magnetic attachment, as shown in FIG.
The guide piece 11a is engaged with the base end of the guide piece 11a inside the extension end. Further, the extension end of the extension piece 12b is
The width direction can also be adjusted by moving in the left-right direction with respect to a.

The base plate 9 is connected to the rising portion 7 of the seat plate at the lower end of the second seat via a leaf spring 13 provided on the door end side of the base plate 9. Normally, the front side of the door of the base plate 9 is the rising portion 7 of the seat plate of the first seat body 4.
The first sheet body 4 and the second sheet body 5 are overlapped with each other at their widthwise ends, and the evacuation opening is closed. . The base plate 9 is bendable or bendable at the leaf spring portion, and forms an evacuation opening by rotating the base plate 9 at the leaf spring portion.

The leaf spring 13 is a rising plate extending up and down, has the flexibility to bend while being twisted to some extent, not only in the front-back direction, and has a large degree of freedom when opened. This is clear when compared with the case of rotating via the base plate hinge. In the case of a hinge, the pivot direction is determined by the hinge axis, and the degree of freedom when the seat is opened is small. In addition, since the hinge is bent at an acute angle, the sheet immediately above the hinge is easily damaged. On the other hand, in the case of a leaf spring, since the sheet is bent in a curved shape, the sheet located immediately above the leaf spring is not easily damaged.

Further, the base plate 9 also has a role of a light weight of the seat, and the base plate 9 provided at the lower end of the second seat rotates about the leaf spring portion at the time of evacuation. A predetermined part of the body 5 can be opened. Then, after the second sheet member 5 is opened to form the evacuation opening, the opened portion of the second sheet member 5 returns to the original position by the force of the leaf spring 13, and the base side of the base plate 9 is closed. And the rising portion 7 at the lower end of the first sheet member 4 is engaged, and the evacuation opening is closed.

FIGS. 8A and 8B show the leaf springs 13 respectively.
FIG. 14 is a diagram showing another embodiment of the present invention. In FIG. 8A, the leaf spring 130 has a straight portion 1 extending in the width direction of the opening.
30a and a plate composed of an inclined portion 130b extending in a direction opposite to the evacuation direction (usually on the fire side), the straight portion side being connected to the rising portion of the seat plate of the second seat body, The inclined portion side is connected to the base end on the door end side of the base plate. Since such a leaf spring 130 has a pressing force in the closing direction of the evacuation opening, after the formation of the evacuation opening, the opening portion of the second sheet member 5 is returned to the original position, and the evacuation opening is closed. The part is closed. In the case of FIG.
0 is a first piece 130 integrally formed in a step shape in plan view.
c and a second piece 130d.

As shown in FIG. 5B, at the portion where the base plate 9 is provided, the seat plate 6 does not have a rising portion, and only the flat portion 8 extends in the opening width direction. . The lower end of the base plate 9 extends horizontally to the non-fire side along the upper surface of the flat portion 8 of the seat plate of the second seat body 5 and is inclined further downward along the side surface of the flat bar. To the cover extension piece 9
0, which prevents a linear gap from being formed between the base plate 9 and the seat plate 6 (the flat portion 8 of the seat plate 6) when fully closed (at the time of division). By doing so, the spread of fire from the gap between the base plate 9 and the seat plate 6 is prevented as much as possible. Note that the side of the flat bar on the non-fire side does not necessarily have to be an inclined surface, and if one of the side surfaces of the flat bar is to be a vertical surface, the cover extension piece is composed of a horizontal piece and a vertical piece. Is also good. FIG.
As shown by a dotted line in (b), a weight W is mounted on the door end side of the base plate 9 on the non-fire side, and the weight W
, The second sheet member 5 is shifted in the closing direction.

As shown in FIG. 9, a predetermined location of the base plate 9 is provided with a French drop 14 having a fuse function. The French drop 14 has a vertically movable locking rod 15, which is located in the descending path of the locking rod 15, and is provided on the upper surface of the flat portion 8 of the seat plate 6 of the second seat body 5. A hole 16 is formed. When the surroundings of the locking rod 15 reach a predetermined temperature (of course, a temperature set assuming that the evacuee has evacuated), the holding portion (not shown) is melted and lowered by heating. . This prevents the lower end of the second sheet member 5 from rising to form an opening even when the engagement by the magnet 10 is weakened by the flame.

When a fire detector or smoke detector (not shown) detects a fire in the fireproof sheet shutter configured as described above, the screen 2 descends to completely close the opening, and the fire side and the non-fire side are separated. Block off. In this state, the ends of the first sheet body 4 and the second sheet body 5 are superimposed, and this superimposed state is maintained by magnetic adhesion by the magnet 10. In the unlikely event that a person is left on the fire side, the engagement by the magnet 10 is released by pushing the second sheet member 5 with the overlapping portion O as the door end side, and the second sheet member 5 is attached to the base plate 9. Leaf spring 13 on the end side (door bottom side)
, And is opened forward (forward and slightly upward) to form an evacuation opening. After evacuation,
The second sheet body 5 returns to the original closed position of the opening by the force of the leaf spring 13, and the door end side end of the base plate 9 and the rising part 7 at the lower end of the first sheet body are engaged by the magnet 10. Further, when the fire side reaches a predetermined high temperature, the locking rod 15 descends and engages with the locking receiving hole 16. Therefore, even if the magnetic force of the magnet becomes weak at high temperature, the second sheet 1
The lower end of 5 does not turn over.

[0023]

According to the present invention, one of the sheets forming the screen can be opened with the leaf spring as a base end, so that the evacuation opening can be easily formed at the time of evacuation. After passing through the opening provided in the seat, the evacuation opening can be automatically and satisfactorily closed by the return force of the leaf spring.

[Brief description of the drawings]

FIG. 1 is a front view of a fire prevention seat shutter.

FIG. 2 is a plan view of a seat shutter for fire protection.

FIG. 3 is a horizontal cross-sectional view, a front view, and a vertical cross-sectional view partially showing a lower end portion of a screen of a fire prevention seat shutter.

4A is an enlarged view of a portion A in FIG. 3, and FIG. 4B is an enlarged view of a portion B in FIG.

5C is an enlarged view of a part C in FIG. 3, and FIG. 5D is an enlarged view of a part D in FIG.

FIG. 6A is a perspective view of a magnet provided at a rising portion of a lower end portion of a first sheet body, and FIG. 6B is a view showing an engagement between a base plate door end side end portion and a rising portion of a lower end portion of the first sheet body. It is sectional drawing.

FIG. 7 is a cross-sectional view showing an arrangement of a base plate door end side end portion and a rising portion of a lower end portion of a first sheet body according to another embodiment.

8A and 8B show a plan view and a front view of a leaf spring according to another embodiment.

9A is a perspective view of a French drop provided on a base plate, and FIG. 9B is a cross-sectional view of the French drop.

[Explanation of symbols]

 2 screen 4 first sheet member 5 second sheet member 6 seat plate 7 rising portion 8 flat portion 9 base plate 10 magnet 11 mounting plate 11a guide piece 12 magnetically attaching plate 12a rising portion 12b horizontal extension piece 13 leaf spring O overlap portion

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E06B 9/17 A

Claims (5)

[Claims] 1. A screen which lowers from above a predetermined portion inside a building and completely closes an opening is constituted by at least two sheet members formed by overlapping widthwise ends thereof, and a lower end of the screen is provided at a lower end of the screen. A seat plate is provided, and a base plate of a predetermined length extending in the opening width direction from the overlapping portion is provided separately from the seat plate at a lower end of one of the sheet bodies,
One end of the base plate in the longitudinal direction is a free end, the base plate is bendable via a leaf spring provided on the other end of the base plate in the longitudinal direction, and the one end of the base plate is set as the overlapped portion. An evacuation opening is formed in the screen by opening at least a part of the sheet body, and the one sheet body opened at least in part is returned to its original position in a superimposed state by the force of the leaf spring. Seat shutter for fire protection, characterized in that: 2. The fireproof seat shutter according to claim 1, wherein a free end at one longitudinal end of the base plate is detachable from a seat plate at a lower end of the other seat body. 3. The seat plate comprises a flat portion extending substantially the entire opening width and a rising portion extending in a width direction except for a portion corresponding to the base plate, and one end of the base plate is connected to the other end. The other end of the base plate is connected to the rising portion of the lower end of the one of the sheet members via the leaf spring. The fireproof sheet shutter according to any one of the above. 4. A magnetic plate having a rising portion and a piece extending horizontally from a lower end of the rising portion is provided at one end of the base plate, and a rising portion of a seat plate at a lower end of the other seat body is provided. Is provided with a magnet via a plate member, and one end of the base plate and the rising portion of the lower end of the other sheet body are detachable via a magnet, and the lower end of the plate member faces upward. The fire prevention seat shutter according to claim 3, wherein the guide piece that extends in an inclined manner is formed to extend. 5. A cover extending piece having a downwardly inclined extending portion is formed at a lower end of the base plate, and the cover extending piece covers a gap between the base plate and a flat portion of the seat plate. 5. The method according to claim 3, wherein
The fireproof sheet shutter according to any one of the above.