JP3939105B2 - Fireproof and smokeproof shutter using fireproof sheet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fireproof and smokeproof shutter using a fireproof sheet having an evacuation port, and in particular, it is possible to improve the sealing performance of the evacuation port before and after the evacuee passes, and smooth the refugee. The present invention relates to a fireproof and smokeproof shutter using a fireproof sheet that enables to pass.
[0002]
[Prior art]
In passages in buildings such as buildings, fire and smoke shutters constructed of metals, materials, fire resistance, board materials, etc. are installed as means for shielding the flow of flames and smoke generated during a fire. Although common, the metal material in recent years, cash despite the fire smoke shutter constructed by refractory material such as silica cloth, fire smoke shutters made fireproof sheets of using fire resistant sheet of glass cloth or the like is developed Has already been put to practical use.
[0003]
As disclosed in, for example, Japanese Patent No. 3097543 as a fire and smoke prevention shutter using this fireproof sheet, a structure in which a slit is provided in the fireproof sheet so that an evacuee can pass during evacuation The fire prevention smoke prevention shutter is known as a known technique.
An evacuation port using a slit provided in a fireproof sheet according to a known technique has an advantage that the structure is simple and the passage of an evacuee is easy.
However, because the structure is simply provided with slits, for example, when the wind pressure and smoke pressure increase in the event of a fire, flames and smoke (gas) flow through the slits, and the original function of the fire and smoke prevention shutter is achieved. It is conceivable that the shielding performance of flames, smoke, etc. will be impaired without being.
[0004]
Therefore, the applicant has already filed an application relating to a fire and smoke shutter that achieves both ease of passage at the evacuation exit and a shielding function required for the fire and smoke shutter.
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-80866
As shown in FIG. 8 of the present application , the above fire-proof smoke-proof shutter is provided with a slit 8 serving as an escape port 1 in a shutter curtain 10 (screen body) made of a fire-resistant sheet, and one side of the slit 8 is formed into a sheet shape. A sheet-like cover 3 having a shape that overlaps with the edge of the sheet-like door 2 is attached to the opposite side of the slit 8 along with the door 2, and the sheet-like cover 3 is attached to the sheet-like door 2. By superimposing on the edge and superimposing on the slit surface, the slit is closed while restricting the movement of the sheet door, thereby improving the shielding function.
Also, strong obstruction restricting sheet cover 3 at the upper end, configured to be weak at the lower end, even if obstruction restricting effect of the slit 8 by the sheet-like cover 3 has been enhanced, difficult to ensure smooth opening and closing of the sheet-like door Therefore, it is possible to achieve both good shielding and opening.
Further, the weight 4 is attached to the lower end portion of the sheet-like door 2 so that the lower end portion of the sheet-like cover 3 and the weight 4 do not overlap with each other, and the sheet- like cover 3 is not placed on the rotation path of the weight 4. By doing so, the door can be opened and closed smoothly and automatically.
[0006]
FIG. 8 is an explanatory view showing the fire and smoke / shutter according to the above configuration, and FIG. 9 is an operation explanatory view of the fire and smoke / shutter according to the above configuration.
The operation of the fire and smoke / shutter shutter during evacuation is as follows.
When the refugee 7 tries to pass from the back surface of the shutter shown in FIG. 8 to the front surface side, the slit 8 is pushed open from the back surface to form the evacuation port 1 and the expansion load of the slit 8 is received. When the sheet-like door 2 and the sheet-like cover 3 open the evacuation port 1, the evacuees can pass through (see FIGS. 8 and 9B).
After the opening of the emergency exit 1, for example, when the sheet-like door 2 and the sheet-shaped cover 3 in a relatively early stage by the passage of one person or a small number of evacuees 7 returns to the closed operation, the sheet-like door 2 and the sheet-like cover restoring force of 3 also, to act relatively smooth, it closed resilient evacuation port also you action smoothly.
[Problems to be solved by the invention]
[0007]
However, in the above-described configuration, after the evacuation port 1 is opened, the sheet-like door 2 and the sheet-like cover 3 are provided, for example, when an elderly person with a slow evacuation speed or a plurality of refugees 7 pass through the evacuation port 1 continuously. If the opening state is continued for a long time by applying a spreading load, the closing restoration property of the sheet-like door 2 is deteriorated.
[0008]
Further, as shown in FIG. 9B , the weight portion A between the upper end portion of the sheet-like door 2 and the upper end portion of the sheet-like cover 3 is on the surface portion of the sheet-like door 2 and the back surface portion of the sheet-like cover 3. Sewn and held so that they overlap .
Therefore, as described above, when the sheet-like door 2 and the sheet-like cover 3 continue to be subjected to the spreading load for a long time and continue to be opened, and the closing restoration property of the sheet-like door 2 decreases, the lower end of the sheet-like cover 3 Then, the closing / restoring operation of the sheet-like cover 3 acts before the restoring operation of the sheet-like door 2, and the positional relationship between the front and back of the sheet-like door 2 and the sheet-like cover 3 is reversed.
[0009]
Furthermore, when the closing restoration operation of the sheet-like cover 3 acts first and the sheet-like door 2 tries to automatically restore in the closing direction with a delay, the lower end of the sheet-like door 2 as shown in FIG. In the section, the back surface of the sheet-like door 2 overlaps with the front side of the sheet-like cover 3, and the sheet-like door 2 is twisted with respect to the sheet-like cover 3. As a result, a gap is generated between the seat door 2 and the sheet-like cover 3, thereby impairing the shielding performance of the escape door 1 by the sheet-like door 2, and there is a concern that effective fireproof smoke prevention is not expected.
[0010]
Accordingly, in view of the above-described problems, an object of the present invention is to provide a fireproof and smoke-proof shutter with a fireproof sheet provided with an evacuation port in which a slit formed in the evacuation port is closed by overlapping sheet-like covers. Regardless of the usage situation that opens for a long period of time, the escape port after the evacuees pass is restricted so that the sheet-like cover is neatly closed after the sheet-like door is closed. Accordingly, it is an object of the present invention to provide a fireproof and smokeproof shutter capable of reliably closing the slit.
[0011]
[Means for Solving the Problems]
The object is to provide a screen body made of the fireproof sheet according to claim 1 with an opening slit serving as an evacuation port through which an evacuee can pass, and the one-side sheet portion divided by the opening slit is formed as a sheet-like door. In addition, a sheet-like cover that is superimposed on the opening slit is provided on the other side sheet section that is divided by the opening slit, and a main weight for causing the screen body to drop by gravity on the lower edge of the screen body. A door weight is provided at the lower edge of the sheet-like door, with one end pivotally supported so that the sheet-like door can be restored in the closing direction with respect to the main weight bar, and the other end is a free operation end. In a fire and smoke / shutter equipped with a bar, one end is pivotally supported by the main weight bar via an opening angle restricting means, and the other end is a free operation end. A cover mounting bar positioned so as to be engageable with the front side of the free end of the door weight bar, one end is pivotally supported via a support shaft on the back side of the cover mounting bar, and the other end is a free operation end. A cover guide structure comprising a back side of the free end portion of the door weight bar and a sub-piece positioned so as to be able to be locked, and the cover mounting bar and the sub-piece of the cover guide structure are pivotally supported. The support shaft has a biasing means for biasing so as to always push open between the free end side of the cover mounting bar and the free end side of the sub-piece , and further to the cover mounting bar of the cover guide structure, This can be achieved by a fireproof and smokeproof shutter using a fireproof sheet characterized in that the lower edge of the sheet-like cover is attached.
[0012]
In a preferred embodiment of the present invention, as described in claim 2, the opening angle restricting means includes a first attachment piece attached to an end of the main weight bar, and a cover attachment bar of the cover guide structure. A restriction structure that has a second attachment piece attached to one end, connects the two attachment pieces with a support shaft, and restricts the position so that the attachment surfaces of both attachment pieces are flat, and the cover attachment When the bar is opened, it has a restricting structure for restricting the position so that the angle formed by the respective attachment surfaces of the both attachment pieces is held at a predetermined angle.
【The invention's effect】
[0013]
A fire and smoke / shutter using a fireproof sheet according to the present invention is a fire / smoke / shutter having a sheet-like door that opens an evacuation port and a sheet-like cover that is superimposed on the slit surface of the evacuation port. Since the opening angle regulating means is provided at the lower edge of the sheet-like cover, when the sheet-like door is pushed open by an evacuee or the like, the sheet-like cover also follows the opening operation of the sheet-like door. The opening operation is performed, and the opening of the evacuation port is smoothly and reliably performed.
[0014]
Further, according to the fire and smoke and shutter according to the present invention, when the passage of the evacuees or the like is lost at the evacuation port, the sheet cover moves in the closing direction following the closing operation of the sheet door. The cover is accurately overlapped so as to close the opening slit on the surface side of the sheet-like door.
Therefore, since the escape port slit when the refugee is not passing is more reliably maintained closed than the sheet cover, it is possible to provide a sheet fire / smoke / shutter shutter having excellent airtightness.
[0015]
Furthermore, according to the fire and smoke and shutter according to the present invention, the opening position of the sheet cover that is released following the opening operation of the sheet door is regulated, so that the sheet shape is closed before the sheet door is closed. The cover is not closed.
Therefore, it is possible to secure the blockage of the slit by the sheet-like cover.
[0016]
Furthermore, according to the fireproof and smokeproof shutter according to the present invention, the free end side of the cover mounting bar and the sub-piece is always urged by the urging means in the opening direction of the sheet-like cover so as to be urged. , during closing operation of the sheet-like door, the free end of the door for ways preparative bar, it is possible to reliably guided between the cover mounting bar and Fukukata. In addition, this makes it possible to reliably rotate the cover guide structure in the closing direction. Furthermore, the closing operation of the sheet-like cover following the closing operation of the sheet-like door can be performed smoothly and reliably, and the escape slit can also be reliably closed by the sheet-like cover.
BEST MODE FOR CARRYING OUT THE INVENTION
[0017]
Embodiments of a fire and smoke / shutter according to the present invention will be described below in detail with reference to the drawings.
[0018]
FIG. 1 is a perspective view showing a main part of a fire and smoke / shutter provided with a cover guide structure of the present embodiment, FIG. 2 is a perspective view showing the structure of the cover guide structure, and FIGS. 3 and 4 are opening angle regulating means. FIG. 5 to FIG. 7 are explanatory views showing the operation of the cover guide structure.
[0019]
Based on FIG. 1, the structure of the fireproof smoke-proof shutter using a fireproof sheet is demonstrated.
[0020]
The screen body 11 is formed of a fireproof sheet. Screen body 11 is mounted a main way bets bar 12 is a known means to the lower, from the upper end, for example, the ceiling of the building has been wound on the winding shaft (not shown) provided in the horizontal direction The When a fire or the like is emitted, automatically or by manual operation, the take-up shaft is rotated in the take-up direction opposite to the direction, the screen body 11, suspended by gravity of the main weight bar 12, entrance or passage resulting building Block the ignition and smoke distribution.
[0021]
To the screen body 11, Ru provided a longitudinal slit 13 shall be the emergency exit. In Figure 1, the left side of the slit 13 is formed into a sheet door 14, the right side surface of the slit 13, the sheet-like cover 15 superimposing on the slit 13, the screen body 11 and so as to be integrally sewing machine Sewing 16 is performed by such means.
[0022]
On the lower edge of the sheet-like door 14, a belt-like door main weight bar 18 that is pivotally supported on the main weight bar 12 via a hinge 17 is attached along the lower edge of the sheet-like door 14. The hinge 17 is assembled with a restoring spring 19 for elastically urging the door weight bar 18 in a direction in which the door weight bar 18 is always closed (a direction in which the door weight bar 18 is approached).
[0023]
In the present embodiment, it is biased in a direction which always closes the door for the weight bar 18 by the spring force of the restoring spring 19, not name those limited thereto. For example, by using a hinge (not shown) provided with an inclined axis inclined with respect to the vertical line, the opened door weight bar 18 is always urged in the closing direction by utilizing its own weight. You may make it do.
[0024]
The cover guide structure 20 is positioned by being locked to the free end portion of the door weight bar 18.
The cover guide assembly 20 includes a strip-shaped cover mounting bar 22 which is rotatably supported via the opening angle regulating means 21 of the hinged type with the main way DOO bar 12, attached to the rear side substantially in the position of the cover mounting bar 22 It is comprised from the strip | belt-shaped subpiece 24 by which one end part is pivotally supported by the supporting shaft 23 currently provided.
And the cover mounting bar 22, a beak shape is formed by the free end portion of Fukukata 24, and in the beak-shaped portion, and a position corresponding to the free end so as to obtain e mouth of the door for waitbar 18 .
Further, the supporting shaft 23 is wound and held by a biasing means, that is, a spring 33 for biasing the free end portions of the cover mounting bar 22 and the sub-piece 24 in the direction of opening each other.
[0025]
Next, the configuration of the opening angle restricting means 21 will be described.
As shown in FIG. 3, the opening angle regulating means 21 has a first mounting piece 26 and a second mounting piece 27 that are connected to each other by a vertical shaft 25.
The first mounting piece 26 is integrally fixed to the first mounting piece 26 with cam members 29 formed with V-shaped cam structures 28A and 28B at two locations along the circumferential direction of the vertical shaft 25, respectively. It consists of
The second mounting piece 27 can be displaced in the axial direction with respect to the second mounting piece 27 by a position restricting member 31 provided with a projection 30 fitted into each of the cam grooves 28A, 28B. The shaft is held so as to be immovable in the circumferential direction.
[0026]
Further, the first mounting piece 26 and the second mounting piece 27 are supported by being wound around the vertical shaft 25 as an axis, and the protrusion 30 is inserted into one of the cam grooves 28A and 28B. A spring 32 is interposed for elastic insertion.
[0027]
Accordingly, the opening angle restricting means 21 is arranged such that when the protrusion 30 is inserted into one cam groove 28A under the elastic force of the elastic spring 32, the mounting surface of the first mounting piece 26 and the second mounting the mounting surfaces of the support 27 is regulated so as to be planar position to each other, also against the suppression force of it if the repression 32, a first attachment piece 26 and the second attachment piece 27 the vertical shaft 25 The angle formed by the mounting surface of the first mounting piece 26 and the mounting surface of the second mounting piece 27 when the projection 30 is inserted into the other cam groove 28B by relatively rotating as an axis. As shown in FIG. 4 , a predetermined opening angle θ is maintained.
[0028]
The predetermined opening angle θ means an opening angle of a cover mounting bar 22 to be described later. In the embodiment of the present invention, the opening angle is desirably 120 degrees. The opening angle θ means approximately 120 degrees in the embodiment of the present invention, but is not limited to this in other examples.
[0029]
As the opening angle restricting means for restricting the predetermined opening angle θ, the above configuration has been described as an example. However, the configuration is not limited to this configuration, and any opening angle restricting means may be used as long as it can perform the same opening angle restriction.
[0030]
The above is the description of the structure of the cover guide structure which is a feature of the present invention. Then we describe the action.
The sheet-like fireproof smoke-proof shutter according to the present invention is provided with a slit-like evacuation opening in the screen body formed by attaching a weight bar to the lower edge of the refractory sheet, as described in the prior art. The description will be made on the assumption that one side of the mouth edge is the sheet-like door 2 and the sheet-like cover 3 is sewn and held on the screen body so as to close the surface side of the escape port.
[0031]
As shown in FIG. 2, the lower edge of the sheet-like door 2 of the sheet-like fire and smoke / shutter is appropriately attached to the back surface (or the front surface) of the door weight bar 18 formed as a part of the weight bar. It is airtightly fixed (including adhesion) via
The lower edge of the sheet-shaped cover 3, the surface of the cover mounting bar 22 constituting the cover guide structure 20, by hermetically fixed (bonded included) by appropriate attachment means, clogging of the slit by the sheet-like cover Can be secured.
[0032]
For example in the event of a disaster such as fire, fire smoke shutters according to the above configuration, automatically or manually, suspended gravity of the main weight bar 12, in a state where the shield building passage or the like, FIG. 5 The door weight bar 18 to which the sheet-like door 14 is attached operates so as to be positioned in parallel with the main weight bar 12 by the restoring force of the hinge 17.
As a result, the slit-shaped evacuation port 1 provided in the screen body 11 is closed, and the door weight bar 18 is closed, so that the sub-piece 24 of the cover guide structure 20 is connected to the main weight bar 12. Since the sub-piece 24 is pushed so as to approach, the cover mounting bar 22 operates so as to be positioned in parallel with the main weight bar 12 .
As described above, the sheet-like door 14 closes the slit-shaped evacuation port, and further, the sheet-like cover 15 is superimposed on the surface side of the slit-shaped evacuation port 1 to maintain the closed state of the evacuation port 1. Thus, it is possible to ensure the closing operation of the sheet cover with high accuracy following the closing of the sheet door.
[0033]
Evacuees accompanying fire is, if you press the arrow direction in FIG. 6 a sheet-shaped door 14 to the surface side (front side), the door weight for bar 18 which is attached to the sheet-like door 14, hinge 17 It pushes against the elastic force, to open the emergency exit 1. With the opening force of the door for waitbar 18, the cover mounting bar 22 you engage the free end portion of said door for waitbar 18 is operative in the opening direction of the vertical axis 25 of the opening angle regulating means 21 as an axis.
[0034]
By operating the cover mounting bar 22 in the opening direction, the sheet-like cover 15 attached to the cover mounting bar 22 also moves in the direction to open the evacuation port 1, but the opening angle θ of the cover mounting bar 22 Is determined by the opening angle regulating means 21. That is, when the cover mounting bar 22 is pushed open by the operation of the door weight bar 18, the protrusion 30 of the opening angle restricting means 21 is displaced against the elastic force of the spring 32 and is inserted into the cam groove 28B . Accordingly, the opening angle θ (for example, 120 degrees) of the cover mounting bar 22 is held at the opening position shown in FIG. 6, and the evacuee can easily pass through the evacuation port 1.
[0035]
When the passage of the refugee is lost and the opening pressing force of the sheet-like door 14 is lost, the door weight bar 18 is restored in the direction of closing the evacuation port 1 by the elastic restoring force of the vertical hinge 17 as shown in FIG. At this time, the free end of the door for waitbar 18, the contact to order the free end of Fukukata 24 is pivotally supported on the back side of the cover mounting bar 22, the cover mounting bar 22 for Door waitbar 18 and the sub-piece 24 are forcibly rotated about the vertical shaft 25 of the opening angle restricting means 21 as a support shaft in the closing direction of the escape port.
[0036]
Cover mounting pivot to Rutoki bar 22 to evacuation gate closure direction, the projection 30 of the opening angle regulating means 21, against the suppression force of it if repression 32 moves from the cam groove 28B to the cam groove 28A, the It is fitted and held in the cam groove 28A. Therefore, the door weight bar 18 and the cover mounting bar 22 are restored to the positions shown in FIG. 5, and the sheet cover 15 follows the front side of the sheet door 14 after the evacuation port 1 is closed by the sheet door 14. As a result , the evacuation port 1 is reliably closed.
[0037]
The sub-piece 24 after the evacuation port 1 is closed by the sheet-like door 14 and the sheet-like cover 15 is pressed against the main weight bar 12 against the elasticity of the spring 33, and the cover mounting bar 22 and the sub-piece 24 are pressed. Are held at positions where they are substantially parallel (see FIG. 5). The spring force of the spring 33 can push open the free ends of the cover mounting bar 22 and the sub-piece 24 when the sheet cover 15 is in the open state as described above. when in the closed state, it is sufficient even for the weak force which can not be pushed open free ends mutually between Fukukata 24 and the cover mounting bar 22 which is pressed against the main weight bar 12.
[0038]
In the present embodiment, the sub-piece 24 and the cover mounting bar 22 are urged in the opening direction by the spring force of the spring 23, but the invention is not limited to this. The opened sub-piece 24 may be always moved in the closing direction by its own weight by using a hinge (not shown) provided with the.
[Brief description of the drawings]
[0039]
FIG. 1 is a perspective view showing a main part of an embodiment of a fireproof smokeproof shutter according to the present invention.
Is a perspective view showing a mechanism of a weight portion which is attached using the fire smoke shutters made of the present invention; FIG.
FIG. 3 is a perspective view of an open angle restricting means used for attachment to a fire and smoke and shutter according to the present invention.
4 is an explanatory view showing an angle restriction time of an opening angle restriction means shown in FIG. 3. FIG.
FIG. 5 is an explanatory diagram when the evacuation port of the fire and smoke / shutter is closed.
FIG. 6 is an explanatory diagram when the evacuation opening of the fireproof smokeproof shutter according to the present invention is opened.
FIG. 7 is an explanatory diagram of a fire and smoke / shutter shutter according to the present invention when an evacuation port is closed and restored.
8 is an explanatory view showing a fire smoke shutter is prior art.
FIG. 9 is a diagram for explaining the operation of a conventional fire and smoke / shutter, where (a) shows when the evacuation port is closed, (b) shows when the evacuation port is opened, and (c) shows that the evacuation port is illegal. Indicates a blocked state.
[Explanation of symbols]
[0040]
10 ... Shutter curtain 11 ... Screen body 12 ... Main weight bar 13 ... Slit 14 ... ... Sheet door 15 ... Sheet cover 16 ... Sewing 17 ... Hinge 18 ... Door Weight bar 19 ... Restoration spring 20 ... Cover guide structure 21 ... Opening angle restricting means 22 ... Cover mounting bar 23 ··················· 24 ··························································································· 2nd mounting point 28A, 28B ... Cam groove 29 ... Cam member 30 ... Projection 31 ... And position regulating member 32 ........ spring 33 ........ spring

Claims (2)

A screen body made of a fireproof sheet is provided with an opening slit as an evacuation port through which an evacuee can pass, and the one-side sheet portion divided by the opening slit is formed as a sheet-like door, and the other is divided by the opening slit. The side sheet portion is provided with a sheet-like cover to be superimposed on the opening slit, and the lower edge of the screen body is provided with a main weight bar for lowering the screen body by gravity and below the sheet-like door. In the fire and smoke-proof shutter, one end of which is pivotally supported so that the sheet-like door can be restored in the closing direction with respect to the main weight bar, and the other end is attached to the edge of the door. , One end is pivotally supported by the main weight bar via the opening angle restricting means, and the other end is a free operation end, the free end portion of the door weight bar A cover mounting bar positioned so as to be able to be locked to the side, and one end is pivotally supported via a support shaft on the back side of the cover mounting bar, and the other end is a free operation end, and the door weight bar is free. A cover guide structure comprising a back piece and a sub-piece positioned so as to be able to be locked is provided, and the above-described cover mounting is provided on a support shaft that pivotally supports the cover mounting bar and the sub-piece of the cover guide structure. And a biasing means for constantly biasing the space between the free end side of the bar and the free end side of the sub-piece , and further, the lower edge of the sheet-like cover is attached to the cover mounting bar of the cover guide structure. A fire and smoke-proof shutter using a fire-resistant sheet characterized by being attached.     The opening angle restricting means has a first attachment piece attached to the end portion of the main weight bar and a second attachment piece attached to one end of the cover attachment bar. A restriction structure that connects the shafts and restricts the positions of the mounting surfaces so that the mounting surfaces of both mounting pieces are flat, and when the cover mounting bar is opened, the angle formed between the mounting surfaces of the both mounting pieces is The fireproof smoke-proof shutter using the fireproof sheet according to claim 1, wherein the fireproof sheet has a restricting structure for restricting a position so as to be held at a predetermined angle.

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