JP7500346B2 - Evacuation route structure - Google Patents

Description

The present invention relates to an evacuation route structure for securing an evacuation route in the event of a disaster such as a fire.

In some buildings, a pressurized vestibule is provided between a room and the evacuation staircase to prevent smoke from a fire or other accident from entering the evacuation staircase. In this type of evacuation route, the vestibule is pressurized in the event of a fire to prevent smoke from the room from entering the evacuation staircase.
The door device installed on the wall of the vestibule may have difficulty in opening and closing the door body due to the pressure difference between the inside and outside of the vestibule. Therefore, it has been proposed to use a door device with a pressure difference relief mechanism, as described in Patent Document 1, for such a door device.

Patent No. 5535348

However, if the door device with the pressure differential relief mechanism is installed on the wall facing the evacuation staircase, the door that has been rotated open toward the evacuation staircase may be pushed by the air current flowing from the ancillary room toward the evacuation staircase, making it difficult to close.

In view of the above problems, the present invention has the following configuration.
an evacuation route structure comprising a wall portion that separates a high-pressure chamber from a low-pressure chamber having a lower air pressure than the high-pressure chamber, and a door device provided on the wall portion, wherein the door device has a door body that rotates open toward the low-pressure chamber and rotates closed in the opposite direction, and the door body in the open state is closed by an air flow from the high-pressure chamber to the low-pressure chamber , the door device being an evacuation-side door device provided on the wall portion on the evacuation side of the high-pressure chamber, and an entry-side door device is provided on the wall portion on the entry side of the high-pressure chamber, and the entry-side door device comprises a hanging door supported by a fixed portion so as to rotate open toward the high-pressure chamber and rotate close in the opposite direction, and a door end door that is supported on the door end side of the hanging door and rotates open and closed .

The present invention is configured as described above, so that an open door can be easily closed.

1 is a perspective view showing an example of an escape route structure according to the present invention. FIG. 4 is a cross-sectional view of a main portion of the escape route structure. 1A is a diagram of an example of an entry side door device as viewed from the entry side, and FIG. 1B is a diagram of an example of an evacuation side door device as viewed from the evacuation side. 5A to 5C are cross-sectional views sequentially showing the closing operation of the first door body. 11A to 11C are cross-sectional views sequentially showing the closing operation of the second door body.

This embodiment discloses the following features.
An escape route structure comprising a wall portion that separates a high-pressure chamber from a low-pressure chamber, the air pressure of which is lower than that of the high-pressure chamber, and a door device provided on this wall portion, the door device having a door body that rotates open toward the low-pressure chamber and closes in the opposite direction, and the door body in the open state is closed by an airflow flowing from the high-pressure chamber to the low-pressure chamber (see Figures 1 to 4).
Here, the "high pressure chamber" refers to a chamber in which the air pressure is relatively higher than that of the "low pressure chamber".
The term "air flow" refers to the flow of gas from the high pressure chamber to the low pressure chamber when the door is in an open state.

The second feature is that the door body has a hinged door whose tail side is supported by a fixed part and can rotate, and a front door that is connected to the front side of the hinged door so that it can rotate (see Figures 3(b) and 5).

The third feature of the door body is that it comprises a hanging door whose tail side is supported by a fixed part and can rotate, and a door end door which is rotatably connected to the door end side of the hanging door and whose intermediate part in the door width direction is supported so that it can rotate relative to the upper and/or lower fixed part and can move in the opening width direction, and the hanging door rotates the door end side part of the door end door from the rotation axis to the high pressure chamber side by the air flow that the hanging door receives from the high pressure chamber side and the part of the door end side of the rotation axis of the door end door receives from the high pressure chamber side to close the door (see Figure 3 (b) and Figure 5).

The fourth feature is that the end door has an opening that can be opened and closed at the corner near the end and the bottom end (see Figures 1 and 3(b)).

The fifth feature is that one half of a magnetic catch is provided on the door end side of the hinged door, and the other half of the same magnetic catch is provided on the door tail side of the door end door so that it can be attached and detached from the one half in the door thickness direction (see Figures 3(b) and 5).

The sixth feature is that the high-pressure chamber is an auxiliary room located in the evacuation route and is pressurized by an air supply device (see Figure 1).

The seventh feature is that the door device is an evacuation-side door device provided on the wall on the evacuation side of the high-pressure chamber, and an entry-side door device is provided on the wall on the entry side of the high-pressure chamber, and the entry-side door device is equipped with a hanging door supported on a fixed portion so as to rotate open toward the high-pressure chamber and close in the opposite direction, and a door end door supported on the door end side of the hanging door and rotates open and closed (see Figures 3(a) and 4).

As an eighth feature, the evacuation side door device is arranged offset in the evacuation route width direction with respect to the entry side door device (see Figs. 1 and 2).
Here, the phrase "shifted in the evacuation route width direction" means that the positions in the evacuation route width direction are different.

In addition, in the embodiments described below, the invention in which only the following constituent elements are essential is also disclosed.
One of the inventions is a door device that comprises a hanging door that rotates while its tail side is supported by a fixed part, and a door end door that is rotatably connected to the door end side of the hanging door, and that opens and closes an opening by using the hanging door and door end door, wherein one half of a magnetic catch is provided on the door end side of the hanging door, and the other half of the same magnetic catch is provided on the door tail side of the door end door so as to be attached and detached from the one half in the door thickness direction (see Figures 4 and 5).
According to this invention, the magnetic force of the magnetic catch allows the end door to be held approximately flat against the hanging door, and this held state can be easily released.

<Specific embodiment>
Next, specific embodiments having the above-mentioned features will be described in detail with reference to the drawings.

The escape route structure A comprises a wall portion separating a high-pressure chamber from a low-pressure chamber on the escape side (escape side) of the high-pressure chamber, where the air pressure is lower than that of the high-pressure chamber, and a door device provided on this wall portion.
In more detail, the escape route structure A comprises a first chamber 1, a second chamber 2 adjacent to the first chamber 1 on the escape side across a wall 1a, a third chamber 3 adjacent to the second chamber 2 on the escape side across a wall 2a, and a fourth chamber 4 adjacent to the third chamber 3 on the escape side across a wall 3a, with an escape side door device 20 provided on the escape side wall 1a of the first chamber 1, an entry side door device 10 provided on the entry side wall 2a of the second chamber 2, and an escape side door device 20 provided on the escape side wall 3a of the third chamber 3 (see Figure 1).

For example, if a fire breaks out in the first chamber 1, the first chamber 1 becomes a high-pressure chamber with a relatively high air pressure due to the flames, and the second chamber 2 becomes a low-pressure chamber with a relatively lower air pressure than the first chamber 1.
In addition, when air is supplied to the third chamber 3 in the event of a fire, the third chamber 3 becomes a high-pressure chamber with a higher air pressure than the second chamber 2 and the fourth chamber 4, and the fourth chamber 4 becomes a low-pressure chamber with a relatively lower air pressure.

The first room 1 is a room surrounded by walls on all four sides and is substantially sealed. A smoke exhaust device 1b is installed in the ceiling of the first room 1 to exhaust smoke generated in the event of a fire to the outside of the room.

The second room 2 is, for example, a corridor for traveling between other rooms (not shown). A smoke exhaust device 2b is installed in the ceiling of the second room 2 to exhaust smoke that has entered from the first room 1 side, etc., to the outside in the event of a fire.

The third chamber 3 is a substantially sealed room surrounded on all four sides by fire-resistant walls.
An air supply device 3b is provided in the third chamber 3 so as to be activated in the event of a fire to supply air. In the illustrated example, the air supply device 3b is disposed under the floor and supplies air from the floor surface into the third chamber 3, making the air pressure inside the third chamber 3 higher than that outside the third chamber 3.

The fourth chamber 4 forms a space that leads to the evacuation stairs 4a. The air pressure in this fourth chamber 4 is lower than that in the third chamber 3 when the air supply device 3b is activated.

The third room 3 and the fourth room 4 function as an attached room and a special evacuation staircase, respectively, as stipulated by the Building Standards Act.

As shown in Figures 2 and 3(a), the entrance door device 10 includes a frame 11 fixed integrally to the inner edge of the opening of the wall 2a, a hanging door 12 supported by the frame 11 (immovable part) so as to rotate open toward the third room 3 (annex) and close in the opposite direction, a door end door 13 supported on the door end side of the hanging door 12 and rotates open and closed, a door closer (not shown) that biases the hanging door 12 in the closing direction, and a hinge closer (not shown) that faces the hanging door 12 and biases the door end door 13 in the closing direction.

As shown in Figure 3(a), the frame body 11 is formed in an inverted concave shape when viewed from the front, and has left and right vertical frames 11a, 11b spaced apart in the width direction, and an upper frame 11c connected between the upper ends of these vertical frames. The frame body 11 is fitted into and fixed to a rectangular opening in the wall portion 2a.
As another example of the frame body 11, it is also possible to configure it as a rectangular frame when viewed from the front, having left and right vertical frames, an upper frame, and a lower frame.

The hanging door 12 is formed in a horizontally concave shape when viewed from the front, and has a rectangular main body 12X1 that is long in the vertical direction, and support pieces 12X2, 12X2 that protrude toward the door end from the upper and lower ends of the main body 12X1, respectively (see Figure 3 (a)).
The end side portion of the main body 12X1 of the hanging door 12 is supported by the frame 11 so as to rotate about a vertical shaft 12e as a fulcrum for opening and closing. The shaft 12e may be, for example, a pivot hinge of a well-known structure.

The end door 13 is formed in a horizontally convex shape when viewed from the front, and has a long, rectangular end side portion 13X1 that fits between the upper frame 11c and the floor surface, and a rectangular end side portion 13X2 that protrudes from the end side portion 13X1 toward the end of the door and fits between the upper and lower support pieces 12X2, 12X2.
The trailing edge portion 13X2 of the end door 13 is engaged between the upper and lower support pieces 12X2, 12X2 of the hanging door 12 so as to rotate to open and close with respect to the support pieces 12X2, 12X2, using a vertical axis 13g as a fulcrum.

The shaft 13g is positioned toward the door end in the tail end portion 13X2. This shaft 13g is equipped with a hinge closer (not shown) that biases the door end door 13 in the closing direction.

A rotatable lever handle 13d is provided near the end of the end door 13 so as to protrude to the front and back sides.
A latch 13e is provided at the door end of the door end door 13 so as to appear and disappear when the lever handle 13d is rotated. The latch 13e is engaged with and disengaged from a latch receiver 11a1 provided on the vertical frame 11a on the door end side.

In addition, an insertion hole 13a and a cover member 13b that opens and closes this insertion hole 13a are provided at the corner portion near the end of the door and the bottom end of the door end door 13.

The insertion hole 13a is a through hole formed by cutting out a corner portion of the end door 13 near the door end and the bottom end, and is formed to a size that allows, for example, a fire hose or a power cable to be inserted.

The cover member 13b is a plate-like member that closes the insertion opening 13a in an openable and closable manner. In the illustrated example, the cover member 13b is configured to rotate to open and close like a door, but in other examples, it can be configured to slide to open and close like a sliding door, or to be removable.

In addition, one half 12d of a magnetic catch is provided on the door end side of the main body 12X1 of the hanging door 12, and the other half 13f of the same magnetic catch is provided on the door trailing edge side of the door end door 13 so as to be attached and detached from the one half 12d in the door thickness direction.
The magnetic catch is configured to magnetically attach the other half 13f to the one half 12d, and may be called a magnetic latch, etc. One of the one half 12d and the other half 13f is configured from a permanent magnet, and the other is configured from a magnetic material or a permanent magnet with its magnetic poles facing in the opposite direction.
The magnetic catch holds the surfaces of the hanging door 12 and the end door 13 so that they are approximately flush when in the fully closed state, and its magnetic force is appropriately set so that it detaches when an opening force is applied to the end door 13 by external operation, allowing the end door 13 to be easily opened.
As another example, the magnetic catch can be replaced with another latch structure such as the latch 13e and latch receiver 11a1 described above.

The door closer (not shown) of the entrance door device 10 may be any device that biases the hanging door 12 to rotate in the closing direction. For example, it may be configured to pull the hanging door 12 in the closing direction when opened between the hanging door 12 and the frame 11, or to push the hanging door 12 in the closing direction when opened.

The hinge closer (not shown) of the entry door device 10 only needs to bias the end door 13 to rotate in the closing direction relative to the hanging door 12, and can be, for example, configured to rotate the end door 13 in the closing direction by the restoring force of a torsion spring.

The entrance door device 10 configured as described above ensures an air passage that communicates with the inside and outside of the door between the tail end portion 13X2 of the tail end door 13 and the main body portion 12X1 of the hanging door 12 when the tail end door 13 is rotated relative to the hanging door 12 (see the two-dot chain line in Figure 2).

The evacuation door device 20 also has a door body (in the illustrated example, the door end door 23) that rotates open toward the low pressure chamber (in the illustrated example, the second chamber 2 or the fourth chamber 4) and closes in the opposite direction, and the door body in the open state closes due to the force of the airflow that is received from the high pressure chamber (in the illustrated example, the first chamber 1 or the third chamber 3) toward the low pressure chamber.

2 and 3(b), the evacuation door device 20 is equipped with a frame 21, a hanging door 22 that is supported by the frame 21, which is a fixed part at the end of the door, a door end door 23 that is rotatably connected to the door end side of the hanging door 22 and is supported at its middle part in the door width direction so that it can rotate relative to the fixed part above and/or below and can move in the opening width direction, and a door closer (not shown) that biases the hanging door 22 and the door end door 23 in the closing direction, and performs a closing operation by folding the space between the hanging door 22 and the door end door 23, and performs an opening operation by unfolding the space from the folded state. In other words, the evacuation door device 20 opens and closes like a folding door.
Here, the "door width direction" refers to the width direction perpendicular to the door thickness direction of the end door 23. In addition, the "opening width direction" refers to the width direction of the opening opened and closed by the hanging door 22 and the end door 23, i.e., the width direction of the frame 21.

This evacuation side door device 20 closes by rotating the part of the end door 23 closer to the rotating shafts 23a, 23b towards the high-pressure chamber due to the air flow (wind pressure) that the hanging door 22 receives from the high-pressure chamber (in the illustrated example, first chamber 1 or third chamber 3) and the air flow (wind pressure) that the part of the end door 23 closer to the tail end than the upper and lower rotating shafts 23a, 23b receives from the high-pressure chamber (see Figures 5 (a) to (c)).
In this evacuation side door device 20, the total area of the hanging door 22 and the part of the end door 23 on the door tail side of the rotation axes 23a, 23b is set to be larger than the area of the part of the end door 23 on the door tip side of the rotation axes 23a, 23b.

As shown in FIG. 3(b), the frame body 21 is formed in a rectangular frame shape when viewed from the front, integrally having left and right vertical frames 21a, 21b spaced apart in the width direction, an upper rail frame 21c connected between the upper ends of these vertical frames, and a lower rail frame 21d connected between the lower ends of these vertical frames.

The upper rail frame 21c supports the upper running body 24 so that it can slide freely in the width direction of the opening. The upper running body 24 rotatably suspends the upper rotating shaft 23a of the door end door 23 and is configured to run in the width direction of the opening along the upper rail frame 21c, and is sometimes called a hoisting wheel or hanger wheel.

The lower rail frame 21d supports the lower running body 25 so that it can slide freely in the width direction of the opening. The lower running body 25 rotatably supports the lower rotating shaft 23b of the door end door 23 and is configured to run in the width direction of the opening along the lower rail frame 21d, and is sometimes called a guide car, etc.

The hanging door 22 is formed in a horizontally concave shape when viewed from the front, having a rectangular main body 22X1 that is long in the vertical direction, and protrusions 22X2, 22x2 that protrude toward the door end from the upper and lower ends of the main body 22X1, respectively (see Figure 3 (b)).
The end-of-door side portion of the main body 22X1 of the hanging door 22 is supported by the frame 21 so as to rotate to open and close with the vertical shaft 22a as a fulcrum. The shaft 22a may be, for example, a hinge of a known structure, and a plurality of shafts 22a are provided at intervals in the vertical direction between the hanging door 22 and the vertical frame 21a on the end-of-door side.

The end door 23 is formed in a horizontally convex shape when viewed from the front, and has a rectangular end side portion 23X1 that fits between the upper rail frame 21c and the lower rail frame 21d, and a rectangular end side portion 23X2 that protrudes from the end side portion 23X1 toward the end of the door and fits between the upper and lower protrusions 22X2, 22X2 (see Figure 3 (b)).
The upper end portion and the lower end portion of the end door 23 are rotatably connected via shafts 23h to the upper and lower protruding pieces 22X2, 22x2 of the hanging door 22. The shafts 23h may be, for example, hinges.

The door end 23 is supported by the upper and lower rail frames 21c and 21d, respectively, via upper and lower running bodies 24, 25 and rotating shafts 23a, 23b, so that it can be rotated to open and close and can move in the width direction of the opening.

A rotatable lever handle 23c is provided near the end of the end door 23 so as to protrude to the front and back sides.
A latch 23d is provided at the door end of the door end door 23 so as to appear and disappear when the lever handle 23c is rotated. The latch 23d fits into and disengages from a latch receiver 21b1 provided on the vertical frame 21b on the door end side.

In addition, at the corner portion of the end door 23 near the end and the bottom, an insertion opening 23e and a cover member 23f for opening and closing this insertion opening 23e are provided, similar to the end door 13 of the entrance door device 10.

The insertion opening 23e is a through hole formed by cutting out a corner portion near the end and bottom end of the end door 23, and is formed in a size that allows, for example, a fire hose or a power cable to be inserted therethrough.
The cover member 23f may be a plate-shaped member that can open and close the insertion opening 23e. In the illustrated example, the cover member 23f is configured to rotate open and closed like a door, but other examples include a cover member that slides open and closed like a sliding door, or a cover member that can be attached and detached.

In addition, one half 22b of a magnetic catch is provided on the door end side of the main body 22X1 of the hanging door 22, and the other half 23g of the same magnetic catch is provided on the door trailing edge side of the door end door 23 so as to be attached and detached from the one half 22b in the door thickness direction.
The magnetic catch holds the surfaces of the hanging door 22 and the end door 23 so that they are approximately flush when in the fully closed state, and its magnetic force is appropriately set so that it detaches when an opening force is applied to the end door 23 by external operation, allowing the end door 23 to be easily opened.
As another example, the magnetic catch can be replaced with another latch structure such as the latch 23d and latch receiver 21b1 described above.

The door closer (not shown) of the evacuation side door device 20 may be configured to bias the hanging door 22 and the door end door 23 in the closing direction, and may be configured, for example, to pull the hanging door 22 in the closing direction, to push the hanging door 22 in the closing direction, to pull the upper running body 24 and/or the lower running body 25 in the door end direction, or to push the upper running body 24 and/or the lower running body 25 in the door end direction.

When the end door 23 is rotated relative to the hanging door 22 (see the two-dot chain line in Figure 2), the evacuation side door device 20 configured as described above ensures an air passage that communicates with the inside and outside of the door between the tail end portion 23X2 of the end door 23 and the main body portion 22X1 of the hanging door 22.

The entry side door device 10 is disposed offset to one side in the evacuation route width direction (to the right in the evacuation direction according to FIG. 1 ) with respect to the evacuation side door device 20 of the first room 1 .
In other words, the widthwise center of the entry side door device 10 and the widthwise center of the evacuation side door device 20 of the first room 1 are located at different positions in the evacuation route width direction.
Furthermore, the evacuation-side door device 20 on the evacuation side of the third room 3 is positioned offset to one side in the evacuation route width direction (to the left in the evacuation direction according to Figure 1) relative to the entry-side door device 10.
In other words, the widthwise center of the evacuation side door device 20 of the third room 3 and the widthwise center of the entry side door device 10 are located at different positions in the evacuation route width direction.

Next, the characteristic functions and effects of the escape route structure A having the above configuration will be described in detail.
For example, as shown in Fig. 1, when a fire breaks out in the first room 1, the fire is detected by a fire detector (not shown). The fire detector that detects the fire activates smoke exhaust devices 1b and 2b, an air supply device 3b, etc.

The air pressure in the first chamber 1 becomes higher than that in the second chamber 2 due to the influence of the heat of a fire, etc.
The air pressure in the third chamber 3 is higher than that in the second chamber 2 and the fourth chamber 4 due to the air supply from the air supply device 3b.

<Operation of the entrance door device>
Under the above-mentioned air pressure conditions, the entry door device 10 is subjected to the relatively high air pressure within the third chamber 3, making it difficult for the entire door, including the hanging door 12 and the end door 13, to open toward the inside of the third chamber 3, but it is easy to open only the end door 13, which has a narrow door width.
When only the end door 13 is rotated open by an evacuee or the like, the air pressure in the second chamber 2 and the third chamber 3 is balanced by the air passage formed between the hanging door 12 and the end door 13. Therefore, the evacuee or the like can easily rotate the entire door including the hanging door 12 and the end door 13 open.

As shown in Figures 4(a) to (c), when the opening force is removed from the hanging door 12 and the door end door 13 in the open state, the hanging door 12 rotates in the closing direction due to the biasing force of the door closer (not shown), and during this closing rotation, the door end door 13 rotates in the closing direction due to the biasing force of the hinge closer (not shown). During this rotation, the hanging door 12 and the door end door 13 are pushed by the air current heading from the third chamber 3 to the second chamber 2.

<Operation of evacuation door device>
In the above-mentioned air pressure conditions, each evacuation side door device 20 of the first room 1 and the third room 3 is subjected to a relatively high air pressure from within the first room 1 or the third room 3, but if the end door 23 is pushed toward the end of the door rather than the rotation axes 23a, 23b of the end door 23 and rotated even slightly toward the opening side, an air passage is formed between the end door 23 and the hanging door 22, and the air pressure inside and outside the room is balanced, and then the hanging door 22 and the end door 23 can be easily rotated in the opening direction by bending them.

Then, as shown in Figures 5(a) to (c), when the opening force on the evacuation side door device 20 is removed, the hanging door 22 and the door end door 23, which are in a folded state, unfold and close due to the biasing force of the door closer (not shown) and the airflow received from the high-pressure chamber side.
That is, the hanging door 22 and the part of the door end door 23 closer to the tail end than the rotation shafts 23a, 23b receive wind pressure from the airflow going from the high pressure chamber (the first chamber 1 or the third chamber 3 in the illustrated example) to the low pressure chamber (the second chamber 2 or the fourth chamber 4 in the illustrated example). Therefore, the closing force of the door closer is assisted by the wind pressure, and the closing operation is performed quickly.

Therefore, with the evacuation route structure A configured as described above, the door body that is opened during evacuation can be prevented from becoming unable to close due to the air pressure difference between the inside and outside of the room, and the open door body can be easily fully closed.

Moreover, in the above embodiment, the evacuation side door device 20 of the first room 1, the entry side door device 10 of the second room 2, and the evacuation side door device 20 are each arranged so as to be offset from each other in the evacuation route width direction.
Therefore, in the unlikely event that smoke generated upstream of the evacuation route infiltrates a room downstream, the smoke can be circulated within the room, making it difficult for the smoke to infiltrate into the next room.
For example, smoke that enters the third chamber 3 when the entry door device 10 is opened will convect within the third chamber 3 by colliding with the wall portion 3a, etc., and therefore will not easily enter the fourth chamber 4 even if the evacuation door device 20 is open.

Furthermore, in the above embodiment, the door end direction of the evacuation side door device 20 is opposite to the door end direction of the entry side door device 10.
For this reason, even if the entry side door device 10 and the evacuation side door device 20 are shifted in the evacuation route width direction as described above, it is easy to ensure a linear evacuation route, and ultimately, rapid evacuation action is possible.

<Modification>
According to the above embodiment, as a particularly preferred example, the entry side door device 10 and the evacuation side door device 20 are provided with automatic closing devices such as a door closer and a hinge closer, but as another example not shown, it is also possible to omit the automatic closing devices and have the door body closed only by the air pressure difference between the inside and outside of the room.

In addition, according to the above embodiment, as a particularly preferred embodiment, the evacuation side door device 20 is positioned offset in the evacuation route width direction relative to the entry side door device 10, but as another example, it is also possible to position the entry side door device 10 and the evacuation side door device 20 at the same position in the evacuation route width direction.

In the above embodiment, the entrance door device 10 may be, for example, a door device with a pressure differential reduction mechanism disclosed in JP 2013-177803 A.
In addition, the entry door device 10 may be any device that is equipped with a mechanism for reducing the pressure difference between the inside and outside of the room, and as another example, it may be configured in a manner other than the above-mentioned embodiment or the manner disclosed in the above-mentioned publication.

In addition, in the above embodiment, the evacuation side door device 20 can be applied to, for example, the door device disclosed in JP 2019-100037 A.
In addition, the evacuation side door device 20 may be designed to close due to the airflow from the high pressure chamber to the low pressure chamber, and may be configured in a manner other than the above embodiment or the manner disclosed in the above publication.

Furthermore, the present invention is not limited to the above-mentioned embodiments, and can be modified as appropriate without departing from the spirit and scope of the present invention.

1: First chamber (hypertensive chamber)
2: Second chamber (low pressure chamber)
3: Third chamber (hypertensive chamber)
4: Fourth chamber (low pressure chamber)
1a, 2a, 3a: Wall section 1b, 2b: Smoke exhaust device 3b: Air supply device 10: Entry side door device 12: Hinged door (door body)
13: Door end (door body)
13a: Insertion hole 20: Evacuation side door device 22: Hanging door (door body)
23: Door end (door body)
12d, 22b: One half (magnetic catch)
13f, 23g: other half (magnetic catch)
23e: Insertion port A: Escape route structure

Claims (2)

An escape route structure comprising a wall portion separating a high pressure chamber from a low pressure chamber having a lower air pressure than the high pressure chamber, and a door device provided on the wall portion,
the door device includes a door body that rotates to open toward the low pressure chamber and rotates to close in the opposite direction, and the door body in an open state is closed by an air flow from the high pressure chamber to the low pressure chamber ,
The door device is an evacuation-side door device provided on a wall portion on the evacuation side of the high-pressure chamber, and an entry-side door device is provided on a wall portion on the entry side of the high-pressure chamber,
The escape route structure is characterized in that the entry side door device comprises a hanging door supported on a fixed portion so as to rotate open toward the high-pressure chamber and close in the opposite direction, and a door end door supported on the door end side of the hanging door and rotates open and closed . 2. The escape route structure according to claim 1 , wherein the escape side door device is arranged offset in a width direction of the escape route with respect to the entry side door device.

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