JP5937288B2 - Fire door to prevent flooding of indoor equipment - Google Patents

Description

  The present invention relates to a fire door that prevents flooding of indoor facilities. In particular, when a storage facility that contains liquid such as water installed indoors is damaged by an earthquake, etc., it relates to the structure of a fire door that discharges the liquid so that other facilities will not be submerged by the liquid flowing out of the storage facility. .

  For fire-resistant buildings or semi-refractory buildings, it is stipulated in the Japanese Building Standards Law to establish a “fire-proof zone” for the purpose of keeping the expansion of fire and smoke within a certain range in the event of a fire. It has been. This fire-proof section has a role of locally stopping a fire by providing provisions such as installation of fire-proof equipment such as a fire-resistant floor, a fire wall, and a fire door.

  Compartment for building and work facilities (hereinafter referred to as “buildings”), with liquid storage facilities or liquid passages (hereinafter referred to as “liquid storage facilities”) inside the compartment If it is a flammable liquid, it may be a dangerous substance against the leakage or overflow of liquid caused by external forces such as earthquakes or damage to `` liquid storage facilities '' due to aging. A flammability prevention specification is stipulated by laws and regulations related to

  On the other hand, in a power plant or the like, a building in which a storage facility for storing an incombustible liquid such as water is installed in a fire prevention compartment is provided. When a storage facility for storing a flammable liquid is installed in a fire prevention section, fire prevention measures are implemented by laws or regulations as described above.

  However, if a storage facility that contains incombustible liquid installed in a room is damaged by an earthquake or the like, the room is blocked by a fire door. There is a concern that other equipment will be flooded with this liquid. In the event of a large-scale earthquake that may cause damage to storage facilities, it is assumed that the fire doors will be closed for fire protection. In the event of a large-scale earthquake, priority is given to the evacuation of personnel from the room to a safe place, and it is unlikely that the fire door is left open for drainage.

  As described above, the structure and equipment of buildings with “fire prevention compartments” are strictly regulated by related laws and regulations, so that they deviate from these regulations and discharge incombustible liquid that has flowed into the room. It is difficult to provide a route in the building.

  If the fire door that closes the room is a swing-type single door, and the fire door is installed to open from the inside of the room toward the outside of the room, when the room reaches a predetermined water level, the fire is protected by water pressure. The door can be pushed open to drain the liquid out of the room. On the other hand, when the fire door described above is installed so as to open from the outside to the inside of the room, there is a concern that the water level in the room will rise without discharging the liquid to the outside, and other equipment will be flooded with the liquid. Even if it is a sliding door type fire door, there is a concern that other equipment will be flooded with liquid.

  If it is a single-opening type fire door that is difficult to open from the inside to the outside of the room, a child door is provided on the fire door that becomes the single-opening type main door, and the liquid is put into the child door. It is conceivable that the inside of the room is reduced to a predetermined water level by discharging it from the room to the outside.

  As an example of providing a child door to a fire door that is a single-opening type main door, the child door is connected to the parent door so that it can be opened and closed, and the child door can be locked to the parent door from the inside and outside of the door. A steel door with a child door configured to automatically return the child door when an emergency escape from the door is disclosed (for example, see Patent Document 1).

  In addition, as an example in which a child door is provided on a fire door that is a single-opening type main door, there is a pressurized flame prevention system in which a pressurized air supply fan is provided in an attached room, and the fire door is composed of a parent door and a child door. There is a fire door in the pressurized flameproofing system, where a door is provided between the room and the hallway, the main door can be opened to the room side, and the child door can be opened to the hallway against the power hinge. It is disclosed (for example, see Patent Document 2).

JP 2013-108344 A JP 2000-70390 A

  However, although the fire door according to Patent Document 1 can open the child door in the direction opposite to the direction in which the parent door opens, the child door cannot be opened unless the lock is released, and evacuation of personnel is given priority. Sometimes it is difficult to expect to unlock the child door. There is a need for a fire door that can automatically discharge liquid from the child door to the room when the room reaches a predetermined water level without expecting human operation.

  Moreover, the fire door according to Patent Document 2 can automatically open the child door in a direction opposite to the direction in which the main door opens by driving a pressurized air supply fan provided in the attached room. However, since the fire door according to Patent Document 2 is composed of double doors in which the directions of opening of the main door and the child door are different from each other, it is difficult to apply the fire door to an existing single-open fire door. There is a need for a fire door that can automatically discharge liquid from the child door to the outside of the room when the room reaches a predetermined water level, and can be replaced with an existing single-open fire door. The above can be said to be the subject of the present invention.

  This invention is made in view of such a subject, and when the room | chamber interior reaches the predetermined | prescribed water level, the liquid can be automatically discharged | emitted from a child door to the outdoor, the single opening which prevents the flooding of indoor equipment The purpose is to provide a fire door of the type.

  The inventor is a fire door that shuts off a room in which a facility for storing a non-flammable liquid is installed in a room, and is configured by a main door and a child door. By closing the room so as to dam up and connecting the child door to the main door, the force that opens in the opposite direction to the main door so that liquid can be discharged outside the room when the room reaches a predetermined water level. Based on this, the inventors have invented a fire door that prevents flooding of the following new indoor equipment.

  (1) A fire door for preventing flooding of an indoor facility according to the present invention is a fire door that shuts off a storage facility that contains a non-flammable liquid and a room in which at least one facility that should avoid flooding is installed. It is difficult to open from the inside of the room to the outside, and is installed on the single door type main door that dams up the incombustible liquid flowing out from the storage facility, The door is connected to the main door so that it can be opened and closed to open to the outside, and the single door type child door that can discharge the liquid that has flowed into the room is opened. And a self-closing means in which a force for opening and closing the child door is adjusted so that the child door is closed when the interior of the liquid becomes lower than a predetermined water level.

  (2) It is preferable that the main door is closed by the child door and has an opening through which a person can pass.

  (3) It further includes one or more door catchers that maintain the closed state of the child door with respect to the parent door, and the door catcher protrudes from the side surface of the child door opposite to the self-closing means. A cylindrical roller arranged so as to rotate, and a roller clamp that holds the roller so that it can protrude and retract from a side surface of the child door; and an inner wall of the parent door that faces the side surface of the child door It is preferable to have an opening and a latch opening that receives the roller from the outer peripheral direction and fits the roller.

  (4) The self-closing means includes a first hinge plate having a rotation shaft fixed to an end portion, a second hinge plate having a bearing cylinder rotatably connected to the rotation shaft fixed to the end portion, and the first hinge. A coil spring for returning the second hinge plate to a closed state with respect to the first hinge plate from a state in which the second hinge plate is opened with respect to the plate, and the first hinge plate and the second hinge plate And a buffer mechanism that relaxes the relative rotation speed with the moving speed of the buffer oil filled in the bearing cylinder.

  The fire door for preventing flooding of indoor equipment according to the present invention is based on the water pressure of the liquid when the storage equipment containing non-flammable liquid is damaged by an earthquake or the like and the water level in the room rises with the liquid flowing out of the storage equipment. Since the child door is opened and the liquid is discharged to the outside, the indoor water level is lowered and flooding of the indoor equipment can be prevented.

  In addition, the fire door for preventing flooding of indoor equipment according to the present invention is a child door provided in the fire door even in a “fire compartment” where it is difficult to provide a path for discharging the non-flammable liquid that has flowed into the room. The liquid can be discharged out of the room.

It is a top view which shows the example of arrangement | positioning of the room to which the fire door which prevents the flooding of the indoor installation by one Embodiment of this invention is applied. It is the front view of the fire door which prevents the flooding of the indoor installation by the said embodiment, and is the state figure which looked at the fire door from the room. It is a cross-sectional view of a fire door that prevents flooding of the indoor equipment according to the embodiment. It is a perspective exploded view showing composition of self-closing means with which a fire door for preventing flooding of indoor equipment according to the embodiment is provided. It is a longitudinal cross-sectional view which shows the structure of the spring unit with which the said self-closing means is equipped. It is a longitudinal cross-sectional view which shows the structure of the rotation damper unit with which the said self-closing means is equipped.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Configuration of fire doors to prevent flooding of indoor equipment]
Initially, the structure of the fire door which prevents the flooding of the indoor installation by one Embodiment of this invention is demonstrated. FIG. 1 is a plan view showing an arrangement example of a room to which a fire door for preventing flooding of indoor equipment according to an embodiment of the present invention is applied.

  FIG. 2 is a front view of a fire door for preventing flooding of the indoor equipment according to the embodiment, and is a state diagram when the fire door is viewed from the room. FIG. 3 is a cross-sectional view of a fire door that prevents flooding of the indoor equipment according to the embodiment.

(overall structure)
Referring to FIG. 1, a fire door (hereinafter abbreviated as “fire door”) 10 for preventing flooding of indoor equipment according to an embodiment of the present invention blocks a room R set as a “fire compartment”. The room R is surrounded by a fire wall W. When a fire occurs inside the room R, it is possible to prevent the flame from entering the room by closing the fire door 10.

  Referring to FIG. 1, a tank T, which is a storage facility that contains a nonflammable liquid (hereinafter referred to as water) L, is installed inside the chamber R. A set of facilities F1 and F2 is installed inside the room R.

  With reference to FIG. 1, even if a considerable earthquake occurs, the tank T is seismically designed and constructed so as not to be easily damaged. However, if an unexpected earthquake occurs and the tank T is damaged, the room R is blocked by the fire door 10, and the water level flowing out of the tank T raises the water level inside the room R. . In addition, the some arrow in a figure has shown the outflow path | route of the water L. FIG.

  Referring to FIG. 1, a set of facilities F1 and F2 is installed with a concrete foundation (not shown) so as not to be submerged even if it exceeds a predetermined water level H2 (see FIG. 2). However, referring to FIG. 2, when the water level H1 at the allowable limit level is exceeded, there is a concern that the set of facilities F1 and F2 will be flooded. The set of facilities F1 and F2 are facilities in which flooding should be avoided. Therefore, the present invention provides a child door 2 in the main door 1 which is the main body of the fire door 10 and discharges the water L to the outdoor corridor Ha until the inside of the room R is reduced below a predetermined water level L2. did.

  Referring to FIGS. 1 to 3, the fire door 10 includes a single-opening type main door 1, a single-opening type child door 2, and a power hinge 3 serving as a self-closing means. The main door 1 is difficult to open from the room to the outside. Further, the main door 1 blocks the water L flowing out of the tank T.

  With reference to FIG. 1 to FIG. 3, the child door 2 is disposed in the central portion of the parent door 1. Further, the child door 2 is connected to the main door 1 so as to be opened and closed so as to open from the room toward the outside. And the child door 2 can discharge | emit the water L which flowed out into the inside of the chamber R (refer FIG. 1).

  Referring to FIGS. 1 to 3, the power hinge 3 is adjusted in force for opening and closing the child door 2. The power hinge 3 can open the child door 2 when the interior of the chamber R becomes equal to or higher than a predetermined water level H2 with water L (see FIG. 2). On the other hand, the power hinge 3 can close the child door 2 when the inside of the chamber R becomes less than a predetermined water level H2 with water L (see FIG. 2).

  Referring to FIG. 2 or FIG. 3, the main door 1 has a rectangular opening 1h formed at the center. The opening 1h can be closed by the child door 2, as will be described later. And by opening to the magnitude | size which can pass a person through the opening part 1h, the child door 2 can be opened and emergency escape can be escaped from the opening part 1h at the time of a disaster.

(Structure of the main door)
Next, the configuration of the main door will be described. Referring to FIG. 2 or FIG. 3, the main door 1 is formed into a bag shape having a hollow inside by bending and welding a steel plate. It is preferable that a heat insulating material is accommodated in the main door 1. The outer shape of the main door 1 is preferably a standard dimension, and can be 1818 mm × 764 mm (height × width), or 1818 mm × 812 mm (height × width).

  Referring to FIG. 2 or FIG. 3, the main door 1 is surrounded by a door frame 11f on three sides except the lower surface thereof. One door frame 11f extending in the vertical direction and one side surface of the main door 1 are rotatably connected by a plurality of hinges 11b, whereby the single door type main door 1 can be obtained.

  Referring to FIG. 3, the door frame 11 f is provided with a step 111 serving as a door stop. When the main door 1 contacts the step 111, the room can be closed. By projecting the step 111 with respect to the gap d between the inner wall of the door frame 11f and the side surface of the main door 1, it is possible to block the flame generated in the room from entering the room. A buffer member 11d is attached to the step 111. The buffer member 11d alleviates the impact when the main door 1 is closed, and hermetically seals the gap d.

  Referring to FIG. 2, the main door 1 has a door knob 12 disposed on the side opposite to the plurality of hinges 11 b. By rotating the door knob 12, a latch bolt (not shown) connecting the main door 1 and the door frame 11f is released, and the main door 1 can be opened. When the main door 1 is closed, a latch bolt (not shown) is automatically restored so that the main door 1 cannot be easily opened by wind pressure or the like. It is preferable to use a door knob 12 having a locking function.

  Referring to FIG. 2, the door closer 13 is attached to the upper hinge 11b. The door closer 13 has a function of automatically closing the main door 1 that has been artificially opened. Further, the door closer 13 prevents the main door 1 from being suddenly closed by the action of the buffer oil filled in the main body and the damper mechanism, or the main door 1 is not suddenly opened by wind pressure or the like. Thus, it has the function to slow down the rotation speed of the main door 1.

  When the main door 1 configured as described above is arranged in the room R shown in FIG. 1, the main door 1 is difficult to open from the room toward the outside. Then, the main door 1 blocks the water L flowing out from the tank T.

(Structure of child door)
Next, the structure of the child door will be described. Referring to FIG. 2 or FIG. 3, the child door 2 is formed into a bag shape having a cavity inside by bending and welding a steel plate. It is preferable to accommodate a heat insulating material in the child door 2. The child door 2 is disposed so as to block a rectangular opening 1 h formed at the center of the parent door 1.

  Referring to FIG. 3, the main door 1 forms a recess 11h that communicates with the opening 1h. The recess 11h opens in a rectangular shape. On the other hand, the child door 2 protrudes from the base part 2b with the rectangular convex part 2t enclosed by the opening part 1h. And in the state which the child door 2 closed with respect to the main door 1, while the convex part 2t is accommodated in the opening part 1h, the base 2b is accommodated in the recessed part 11h. In addition, the thickness of the child door 2 is formed so as to substantially match the thickness of the parent door 1.

  Referring to FIG. 2 or FIG. 3, the power hinge 3 rotatably connects the inner wall of one recess 11h extending in the vertical direction and the outer wall of the base 2b facing the inner wall. Thereby, with respect to the main door 1, it can be set as the single door type door which opens the child door 2 toward the outdoor from a room | chamber interior.

  If FIG. 3 is referred, the child door 2 will provide the predetermined level | step difference with respect to the main door 1, and will close the opening part 1h. As a result, it is possible to block the flame generated in the room from entering the room. A C-shaped channel member 14c is attached in the frame of the opening 1h. A buffer member 14g such as heat resistant rubber is fitted into the C-shaped channel member 14c. And the child door 2 is airtightly sealed because the end surface of the buffer member 14g contacts the outer surface of the base 2b.

  Referring to FIG. 2, the child door 2 has a door knob 22 disposed on the side opposite to the pair of power hinges 3. The child door 2 can be opened and closed from the room side by holding the door knob 22. A door knob 22 is also provided on the side opposite to the paper surface of FIG. 2, and the child door 2 can be opened and closed from the outdoor side by grasping the door knob 22. The door knob 22 is not limited to the illustrated cylinder type, and may be a lever type.

  Referring to FIG. 2 or FIG. 3, the fire door 10 has a door catcher 23 disposed on the side opposite to the pair of power hinges 3 and 3. The door catcher 23 includes a roller tightening 231 attached to the child door 2 side and a latch opening 23 h provided on the parent door 1 side. The roller tightening 231 includes a cylindrical roller 23r.

  Referring to FIG. 3, the roller tightening 231 has the roller 23 r arranged so that the outer periphery of the roller 23 r protrudes from the side surface of the child door 2. The roller tightening 231 holds the roller 3r so as to be rotatable and holds the roller 23r so as to be able to protrude and retract from the side surface of the child door 2.

  On the other hand, referring to FIG. 3, the latch opening 23 h opens in the inner wall of the main door 1 that faces the side surface of the child door 2. And in the state which closed the child door 2 with respect to the main door 1, the latch opening 23h can receive the roller 23r from an outer peripheral direction, and can be fitted to the roller 23r. Thus, by configuring the roller tightening 231 and the latch opening 23h, the closed state of the child door 2 with respect to the parent door 1 can be maintained against the wind pressure.

(Configuration of self-closing means)
Next, the structure by an example of a self-closing means is demonstrated. FIG. 4 is an exploded perspective view showing the structure of the self-closing means provided in the fire door that prevents flooding of the indoor equipment according to the embodiment. FIG. 5 is a longitudinal sectional view showing a configuration of a spring unit provided in the self-closing means. FIG. 6 is a longitudinal sectional view showing a configuration of a rotary damper unit provided in the self-closing means.

  4 to 6, as the power hinge 3 serving as the self-closing means, for example, a known automatic return hinge disclosed in Japanese Patent Laid-Open No. 8-184254 can be used. The power hinge 3 includes a first hinge plate 31 and a second hinge plate 32. The power hinge 3 includes a damper unit 33, a spring unit 34, and a compression coil spring 35.

  Referring to FIG. 4, the first hinge plate 31 includes a plate-like portion 311 and a pair of support arms 312 and 312. The plate-like portion 311 has a pair of support arms 312 and 312 fixed to both ends thereof. The plate-like portion 311 is provided with a pair of countersunk holes 31b and 31b for screwing. The support arm 312 has a square hole 31h at its end. The ends of the pair of support arms 312 and 312 are separated from each other. One hole 31h and the other hole 31h have the same axial center.

  Referring to FIG. 4, the second hinge plate 32 includes a plate-like portion 321 and a cylindrical bearing portion 322. The plate-like part 321 protrudes in the outer peripheral direction of the bearing part 322. The plate-like portion 321 is provided with a pair of countersunk holes 32b and 32b for screwing. The bearing portion 322 opens with a hexagonal hole 32h at the center.

  Referring to FIG. 4 or FIG. 6, the damper unit 33 includes a rotating shaft 331 and a bearing cylinder 332. The bearing cylinder 332 is rotatably connected to the rotating shaft 331. The outer shape of the bearing cylinder 332 is formed in a hexagonal column shape. The bearing cylinder 332 can be inserted into the hole 32 h and is prevented from rotating about the axis of the bearing portion 322. The rotating shaft 331 has a quadrangular columnar shaft portion 33 a protruding from one end face of the bearing cylinder 332. The shaft portion 33a can be fitted into the one hole 31h and is prevented from rotating about the axis of the one support arm 312.

  Referring to FIG. 6, the bearing cylinder 332 is filled with a buffer oil 33q having an appropriate viscosity in a cylindrical chamber 33r. Further, the bearing cylinder 332 has a stopper 33 s that protrudes from the inner wall of the chamber 33 r and whose front end surface abuts on the outer periphery of the rotating shaft 331. The stopper 33s partitions the inside of the chamber 33r.

  On the other hand, referring to FIG. 6, the rotating shaft 331 has a protrusion 33 t protruding in the centrifugal direction. The bearing cylinder 332 is disposed so as to straddle the protrusion 33t, and includes a movable valve 33v that moves in conjunction with the rotation of the rotary shaft 331. The protrusion 33t opens a first flow hole f1 that is cut out in a rectangular shape from the tip surface. A second flow hole f2 having a larger cross-sectional area than the first flow hole f1 is opened in one blade of the movable valve 33v. A third flow hole f3 having a smaller cross-sectional area than the first flow hole f1 is opened in the other wing of the movable valve 33v.

  Referring to FIG. 6, when the rotating shaft 331 is rotated clockwise with respect to the bearing cylinder 332, the buffer oil 33q on the right side of the chamber 33r passes through the second flow hole f2 and the first flow hole f1. It flows to the left side of the chamber 33r. On the other hand, when the rotary shaft 331 is rotated counterclockwise with respect to the bearing cylinder 332, the buffer oil 33q on the left side of the chamber 33r passes through the third flow hole f3 and the first flow hole f1 to the right side of the chamber 33r. To flow. In these cases, since the cross-sectional area of the first flow hole f1 and the cross-sectional area of the third flow hole f3 are in a relationship of f1> f2, the rotation speed of the rotating shaft 331 in the clockwise direction with respect to the bearing cylinder 332 is compared. Thus, the rotational speed of the rotating shaft 331 in the counterclockwise direction can be reduced.

  Referring to FIG. 6, the damper unit 33 includes a buffer mechanism that relaxes the relative rotational speed between the rotating shaft 331 and the bearing cylinder 332 by the moving speed of the buffer oil 33q filled in the bearing cylinder 332. Then, referring to FIG. 3, the power door 3 having such a damper unit 33 is used to open the child door 2 with respect to the main door 1 by rotatably connecting the main door 1 and the child door 2. In some cases, the rotation speed is increased, and when the child door 2 is closed with respect to the main door 1, the rotation speed can be decreased.

  Referring to FIG. 4 or FIG. 5, the spring unit 34 includes a rotating shaft 341, a bearing cylinder 342, and a coil spring 343. The bearing cylinder 342 is rotatably connected to the rotary shaft 341. The outer shape of the bearing cylinder 342 is formed in a hexagonal column shape. The bearing cylinder 342 can be inserted into the hole 32 h and is prevented from rotating about the axis of the bearing portion 322. The rotating shaft 341 has a quadrangular columnar shaft portion 34 a protruding from the other end surface of the bearing cylinder 342. The shaft portion 34 a can be fitted into the other hole 31 h and is prevented from rotating about the axis of the other support arm 312.

  Referring to FIG. 5, the coil spring 343 is disposed inside the bearing cylinder 342. The coil spring 343 covers the rotating shaft 341. One end of the coil spring 343 is supported inside the bearing cylinder 342. The other end of the coil spring 343 is supported by the rotating shaft 341. When the rotating shaft 341 is rotated in one direction with respect to the bearing cylinder 342, the coil spring 343 stores a force that rotates the rotating shaft 341 in the other direction. When the rotating shaft 341 is released from the state where the rotating shaft 341 is rotated in one direction with respect to the bearing cylinder 342, the rotating shaft 341 can be returned to the initial state.

  Referring to FIG. 5, by appropriately selecting the wire diameter or the number of turns of coil spring 343, the force (that is, the torque) for rotating rotating shaft 341 relative to bearing cylinder 342 can be adjusted. Then, referring to FIG. 3, the main door 1 and the child door 2 are rotatably connected by the power hinge 3 having such a spring unit 34, so that the child door 2 and the child door are connected to the parent door 1. The force to open and close can be adjusted.

  Referring to FIG. 4, the compression coil spring 35 is inserted into the hole 32h of the second hinge plate 32, the damper unit 33 is inserted from one end side of the hole 32h, and the spring unit is inserted from the other end side of the hole 32h. 34 is inserted. Next, the shaft portion 33a is fitted into one hole 31h, and the shaft portion 34a is fitted into the other hole 31h, so that the first hinge plate 31 and the second hinge plate 32 are rotatably assembled. Can do. The shaft 33a and the one hole 31h are preferably fitted so that a predetermined preload is applied to the coil spring 343.

[Operation of fire doors to prevent flooding of indoor equipment]
Next, the operation and effect of the fire door 10 according to the embodiment will be described. 1 to 3, the fire door 10 prevents the set of equipment F1 and F2 from being flooded when the water L flowing out from the tank T is blocked by the main door 1 and the water level rises. Therefore, the child door 2 is provided in the parent door 1, and the water pressure at a predetermined water level L2 exceeds the closing force of the child door 2, thereby ensuring a path for draining the water L when the child door 2 is opened. is there.

  Specifically, referring to FIG. 2, a predetermined water level H2 (open level) at which the child door 2 opens with respect to the parent door 1 is set as follows. Referring to FIG. 2, the distance from floor surface FL to the lower edge of child door 2 is “a”. Further, the water level H2 that the child door 2 opens is assumed to be “b”. Further, the width of the child door 2 is “w”. If it sets in this way, the water pressure P to the child door 2 shall be triangular-distributed, and can be calculated by P = (b−a) × ρ × w × (1/2). “Ρ” is a unit volume mass of the liquid stored in the tank T.

  Referring to FIG. 2, the rotation moment “M1” of the child door 2 due to the water pressure P at the water level H2 can be calculated by M1 = P × w × (1/2). Assuming that the rotational moment at which the child door 2 is closed by the pair of power hinges 3 and 3 is “M2” (see FIG. 3), the relationship “M1”> “M2” is established. The door 2 can be opened and the water L can be discharged outside the room.

  With reference to FIG. 2 or FIG. 3, if “b” when “M1” ≈ “M2” is the discharge level of the water L, the water L is continuously discharged from the child door 2 below the water level H2. The water level can be reduced and the child door 2 can be closed. After the child door 2 is closed, when the water L continuously flows out of the tank T and the water level in the room reaches the water level H2 or higher, the child door 2 can be opened again. Thus, the fire door 10 according to the embodiment can open and close the child door 2 so that the interior of the fire door 10 is less than the predetermined water level H2.

  With reference to FIG. 1 or FIG. 2, if the allowable level “H1” at which the flooding to the set of facilities F1 and F2 is avoided is set to the relationship of “H1”> “H2”, Since the water level does not exceed the water level H2, flooding of the set of facilities F1 and F2 is prevented.

  Referring to FIGS. 1 to 3, the fire door 10 according to the embodiment opens the child door 2 with the liquid water pressure due to the liquid level flowing out from the storage facility and the water level in the room rises, and discharges the liquid to the outside. As a result, flooding of indoor equipment can be prevented. In addition, the fire door 10 according to the embodiment can also escape from the opening 1h by opening the child door 2 in the event of a disaster.

  Referring to FIG. 2 or FIG. 3, it is possible to connect the main door 1 and the child door 2 with the door closer 13 to adjust the opening / closing force of the child door 2 with respect to the parent door 1. By arranging the pair of power hinges 3 and 3 so as not to protrude in the thickness direction, it can be applied to a sliding door type fire door.

  The fire door according to the present invention can be replaced with an existing fire door, and it is expected to reduce the cost of remodeling work.

  The fire door for preventing flooding of indoor equipment according to the present invention is based on the water pressure of the liquid when the storage equipment containing non-flammable liquid is damaged by an earthquake or the like and the water level in the room rises with the liquid flowing out of the storage equipment. Since the child door is opened and the liquid is discharged to the outside, the indoor water level is lowered, and the flooding of the indoor facilities can be prevented.

  The fire door for preventing flooding of the indoor equipment according to the present invention is a liquid from the child door provided on the fire door even in the “fire compartment” where it is difficult to provide a path for discharging the incombustible liquid that has flowed out into the room. Can be discharged outside the room.

1 Parent door 2 Child door 3 Power hinge (self-closing means)
10 Fire door F1 / F2 Equipment L Water (non-flammable liquid)
R room T tank (storage equipment)

Claims (4)

A fire door that shuts off a storage facility containing non-flammable liquid and a room in which one or more facilities that should avoid flooding are installed;
A single-opening type main door that is installed to be difficult to open from the inside of the room to the outside and blocks the incombustible liquid that has flowed out of the storage facility,
A single door type child door that is disposed on the main door and is openably and closably connected to the main door so as to open from the room toward the outside, and can discharge the liquid that has flowed into the room.
A self-closing means in which the force for opening and closing the child door is adjusted so that the child door is opened when the interior of the chamber is above a predetermined water level with the liquid and the child door is closed when the interior of the chamber is less than a predetermined water level with the liquid. And a fire door for preventing flooding of indoor equipment.   The fire door for preventing flooding of indoor equipment according to claim 1, wherein the main door is closed by the child door and has an opening through which a person can pass. One or more door catchers for maintaining the closed state of the child door relative to the parent door;
The door catcher is
A roller that rotatably holds a cylindrical roller disposed so that its outer periphery protrudes from the side surface of the child door opposite to the self-closing means, and that holds the roller so that it can protrude and retract from the side surface of the child door Tighten and
The inundation of indoor equipment according to claim 1 or 2, further comprising: a latch opening that opens to an inner wall of the main door that faces a side surface of the child door, receives the roller from an outer peripheral direction, and fits the roller. Fire door to prevent. The self-closing means is
A first hinge plate having a rotation shaft fixed to the end;
A second hinge plate fixed to an end of a bearing cylinder rotatably connected to the rotating shaft;
A coil spring for returning the first hinge plate from the open state of the second hinge plate to the closed state of the second hinge plate with respect to the first hinge plate;
And a buffer mechanism for relaxing a relative rotational speed between the first hinge plate and the second hinge plate by a moving speed of buffer oil filled in the bearing cylinder. Item 4. A fire door for preventing flooding of the indoor equipment according to any one of Items 1 to 3.

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