JP5413664B2 - Fire door - Google Patents

Description

  The present invention relates to a fire door provided in a staircase or the like.

Conventionally, as a countermeasure against smoke, a pressurized smoke prevention system that can prioritize a space that should be protected from smoke in a fire is known. In this case, a method of supplying air to the attached room and pressurizing the attached room (hereinafter referred to as attached room pressurized smoke prevention) is generally used in order to protect stairs that are particularly important for evacuation.
In such an attached room pressurized smoke proof, for example, a fire door as disclosed in Patent Document 1 is used, so that smoke does not enter when the door is opened, and between the fire room adjacent to the attached room and the attached room. The pressure difference necessary for smoke shielding is secured. In addition, all the fire doors around the attached rooms are closed, but it is necessary to prevent the doors from opening up due to blame or fire fighting activities. Therefore, it is important to make it easy to close all the doors around the attached room and to form a fire prevention compartment.

JP 2006-247118 A

However, the conventional fire door has the following problems.
In other words, the fire door of the staircase facing the attached room is designed to open to the staircase for evacuation, so depending on the air flow control, the fire door remains open due to the pressure difference with the attached room. There was a risk that the fire protection compartment would not be formed.
In order to cope with this, it is considered to strengthen the closing force of the fire door, but since the hinge used for the fire door is generally adapted to the size of the fire door, the door closing force is used. Is limited. In other words, when a large hinge is used to increase the closing force of the fire door, there is a problem that the door becomes too large and the housing does not fit in the building, and that the opening and closing during daily life is hindered.

  The present invention has been made in view of the problems described above, and can be easily closed by reducing the pressure applied to the door surface at the stage of closing the door during the pressurization and smoke prevention of the attached room, and can be used to open the door even in daily life. The purpose is to provide a fire door that does not need to.

In order to achieve the above object, the fire door according to the present invention is a fire door provided with a door that can be freely opened and closed on the door frame via the first hinge, and the door is divided into a plurality of parts divided in the lateral direction. And the doors adjacent to each other are pivotally connected to each other via the second hinge, and include a door opening / closing mechanism that interlocks with a handle provided on the door. A door connecting member capable of restricting the rotation of the adjacent door portions by the second hinge in conjunction with the opening / closing operation of the handle, and a first connected to the door frame via the first hinge in conjunction with the door connecting member . A door locking member that stops the opening / closing operation of the first door portion by the first hinge by locking the one door portion with respect to the door frame. with the rotation of the door portion adjacent is restricted, the by Tobiragakaritome member 1 Is fixed releasing the parts and the door frame, at the time of closing operation of the handle, with a rotatably is restricted release of the rotation of the door portion adjacent the door connecting member, first door by Tobiragakaritome member The structure is characterized in that the portion is fixed to the door frame at a predetermined position.

  In the present invention, when the door is opened from within the door frame, the doors adjacent to each other are joined by the door connecting member by opening the handle, and the frame side door portion and the door frame are joined by the door locking member. Is released and the door can be opened with the first hinge in a state where the plurality of door portions are integrally coupled. In addition, when the door is closed in the door frame, the handle is closed, so that the door connecting member releases the coupling between adjacent door portions, and the door locking member moves the frame side door portion at a predetermined position. It will be fixed to the door frame. At this time, since the door is divided into a plurality of door portions and the plurality of door portions are supported by a plurality of hinges, the attached room pressurized smoke prevention in the case of providing a fire door between the staircase and the attached room In some cases, the pressure due to the pressure difference between the staircase and the attached chamber received by one door portion surface is smaller than when the pressure is applied to the entire door surface by a single door. In other words, it is less susceptible to the pressure difference on the door surface. For example, if there are two doors, it can be closed against the pressure difference to the door surface almost twice as much as the conventional door closing force. , The closing ability will be improved.

Moreover, since the plurality of divided door portions can be closed in order from the frame side door portion, the pressure from the attached chamber applied to the door surface can be reduced and closed, and the closing force can be reduced. Can be planned.
In addition, each door part can be automatically rotated in the closing direction by the action of the hinge, so by releasing the hand from the handle and stopping the opening operation, all the door parts are automatically closed. Is possible.
Furthermore, when opening the door, it is possible to easily open the doors by connecting multiple doors together, so the required door opening force remains the same as before, which hinders usability in daily life. There is no. And, there is an advantage that it does not require time and effort for opening, and it is easy to plan the width necessary for evacuation.

In the fire door according to the present invention, the door connecting member has a first urging member and restricts the rotation of the adjacent door portions against the first urging member when the handle is opened. Is preferred.
In the present invention, when the opening operation of the handle is stopped, that is, by releasing the handle, the door connecting member tries to return to the original position by the biasing force of the first biasing member. Can be unbound.

In the fire door according to the present invention, the door locking member has a second urging member, and the first door portion and the door frame are opposed to the second urging member in conjunction with the door connecting member. It is preferable to fix.
In the present invention, when the coupling between the door portions by the door connecting member is released during the closing operation, the door locking member also tries to return to the original state by the urging force of the second urging member. The side door portion can be fixed to the door frame at a predetermined position.

  According to the fire door of the present invention, it can be easily closed by reducing the pressure applied to the door surface at the stage of closing the door at the time of pressurized smoke prevention in the attached room, and a large force is not required for opening the door even in daily life. There is an effect. Since the pressure applied to one door surface is reduced and the closing force is increased, the influence of the pressure on the door surface can be suppressed, so that the fire door is opened by the pressure difference between the staircase and the attached room. Can be prevented.

It is a side view of the fire door by embodiment of this invention. It is a top view of the state which opened the fire door shown in FIG. It is a top view which shows the open / close state of a fire door, Comprising: (a) is a figure of the state which closed the 1st door part, (b) is a figure of the state which closed the 1st door part and the 2nd door part. It is a partially broken side view which shows the door opening / closing mechanism of a fire door, Comprising: It is a figure of the state at the time of closing operation. It is a partially broken side view which shows the door opening / closing mechanism of a fire door, Comprising: It is a figure of the state at the time of opening operation.

Hereinafter, fire doors according to embodiments of the present invention will be described with reference to FIGS. 1 to 8.
As shown in FIG. 1, the fire door 1 according to the present embodiment is provided in a staircase such as a building and closes between the staircase and the attached room in the event of a fire.
The fire door 1 includes a door 3 that can be freely opened and closed on a door frame 2 via a first hinge 5 </ b> A, and a door opening and closing mechanism 10 that interlocks with a handle 4 provided on the door 3.

  As shown in FIGS. 1 to 3, the door frame 2 includes vertical frames 2a and 2b and horizontal frames 2c and 2d, which will be described later on a lower frame 2d positioned below the first door portion 3A described later. A locking hole 21 corresponding to the second door locking bar 14 is provided.

The door 3 is composed of two left and right doors divided in the horizontal direction (the left side in FIG. 1 is the first door portion 3A (frame side door portion), and the right side of the paper is the second door portion 3B). Adjacent door portions 3A and 3B are connected via a second hinge 5B. That is, the second door portion 3B is rotatable with respect to the first door portion 3A by the second hinge 5B. The first door portion 3A and the second door portion 3B are both set to the same width dimension. Here, the hinges used for the first hinge 5A that connects the door frame 2 and the first door portion 3A and the second hinge 5B that connects the door portions 3A and 3B are substantially the same in closing force. It is used.
And in the side edge part 3a of the 2nd door part 3B side (paper surface right side) of the 1st door part 3A, the protrusion end 11a of the door connection bar 11 mentioned later provided in the 2nd door part 3B is inserted and extracted. A recess 31 is provided.

  The door 3 is made of a steel member, and although not particularly shown in the drawing, a glass having fire resistance such as a meshed glass may be contained in a part thereof. In addition, according to a required fireproof time, the thickness of steel materials etc., the kind of glass which has fireproof property, and a use range can be changed suitably.

  As shown in FIGS. 4 and 5, a pair of rotating plates (first rotating plates 6A and 6B) are arranged in the vertical direction at the position of the handle 4 of the second door portion 3B, and teeth are formed in the peripheral portions, respectively. It is in the form of a gear, and is pivotally supported by the second door portion 3B so as to be rotatable while meshing with each other. A handle 4 is fixed to the first rotating plate 6A, and the second rotating plate 6B meshes with a rack 11c of a door connecting bar 11 described later. That is, by rotating the handle 4, the first rotating plate 6A rotates in the direction of arrow E1, and the second rotating plate 6B that meshes with the first rotating plate 6A also rotates in the direction of arrow E2 via the rack 11c. The door connecting bar 11 is configured to slide in the longitudinal direction toward the first door portion 3A side (the left side in the drawing).

  As shown in FIGS. 4 and 5, the door opening / closing mechanism 10 is configured to connect the adjacent first door portion 3 </ b> A and second door portion 3 </ b> B in conjunction with the opening / closing operation of the handle 4. Door connecting member) and first and second first door locking bars 12 that can lock the first door portion 3A connected to the door frame 2 with respect to the door frame 2 in conjunction with the door connecting bar 11. , 14 (door locking member) and a connecting member 13 for connecting the first and second locking bars 12, 14. 4 and 5 show a state in which the inside of the door 3 can be seen.

  The door connecting bar 11 is a long bar disposed with the base end 11b on the door frame 2 side and the longitudinal direction oriented in the lateral direction, and is advanced and retracted in the width direction of the second door portion 3B by the rotation of the handle 4. The projecting end 11a can project into the recess 31 of the first door portion 3A by this forward / backward movement. The door connecting bar 11 is formed with the rack 11c extending along the longitudinal direction and meshing with the second rotating plate 6B. The rack 11c converts the rotational motion of the second rotating plate 6B into linear motion in the direction in which the rack 11c extends. That is, the door connecting bar 11 is configured to move forward and backward together with the rack 11c.

  A first spring member 15 (first biasing member) is provided at the base end 11 b of the door connecting bar 11. The first spring member 15 is in a normal state in which it is most contracted when the protruding end 11 a of the door connecting bar 11 is not inserted into the recess 31, and extends when the protruding end 11 a is moved to the position inserted into the recess 31. It is in the state.

  The first door locking bar 12 is a long bar disposed in the first door portion 3A with the longitudinal direction oriented in the vertical direction, and its upper end 12a moves forward and backward so that it can protrude into the recess 31. It has a configuration. The lower end 12b is provided with a second spring member 16 (second urging member) and is rotatably connected to the other end 13a of the connecting member 13. The first door locking bar 12 has an upper end 12 a that can be inserted from below in a direction perpendicular to the axial direction of the recess 31.

The second spring member 16 is in an extended normal state with the upper end 12a of the first door locking bar 12 protruding into the recess 31, and contracts when the upper end 12a moves to a position where it has come out of the recess 31. It is in a state.
In addition, the protrusion length into the recessed part 31 of the upper end 12a of the 1st door latching bar 12 is possible for the 1st door latching bar 12 to move below by the pressing force of the projecting end 11a of the door connection bar 11. It is said to be length.

  Thus, the 1st door latching bar 12 is the state in which the upper end 12a was inserted in the recessed part 31 in the normal state, and when the protrusion end 11a of the door connection bar 11 mentioned above is inserted in the recessed part 31, The upper end 12a is pressed downward by the protruding end 11a and moves downward against the bias of the second spring member 16.

The connecting member 13 has a center of rotation 13c at the center in the longitudinal direction rotatably supported by the first door portion 3A, one end 13a at the lower end 12b of the first door locking bar 12, and the other end 13c at the second door. The upper end 14a of the locking bar 14 is connected to be rotatable in a plane parallel to the door surface. Through holes are formed in both ends 13a and 13b of the connecting member 13, respectively, and the through holes engage with protruding pins (not shown) formed in the door locking bars 12 and 14, respectively.
That is, as shown in FIG. 5, the connecting member 13 rotates clockwise around the rotation center 13 c as the first door locking bar 12 moves downward, and above the other end 13 b. The second door locking bar 14 is pulled up with the movement to the position.

The second door locking bar 14 is a long bar disposed with its longitudinal direction facing the vertical direction, and its upper end 14 a is rotatably connected to the other end 13 b of the connecting member 13, and By moving, it moves forward and backward in the vertical direction, so that the lower end 14 b can advance into the locking hole 21 formed in the door frame 2. A rotatable sphere 17 is provided at the lower end 14 b of the second door locking bar 14. The rotating sphere 17 has a wheel function for smoothly moving the first door portion 3A when the door 3 is opened and closed.
Further, the locking hole 21 provided in the door frame 2 has a tapered shape in which the peripheral edge of the hole is cut obliquely so that the rotating sphere 17 can easily enter.
A spring member (not shown) may be provided between the rotating ball 17 and the lower end 14b. In this case, the vibration of the door 3 when the door is moved can be absorbed, resulting in trouble when the door is opened and closed. A difficult structure can be obtained.

Next, the effect | action of the fire door 1 mentioned above and the opening / closing procedure of the fire door 1 are demonstrated in detail based on drawing.
As shown in FIGS. 4 and 5, when the door 3 is opened from the inside of the door frame 2, the first rotating plate 6 </ b> A is the same as the handle 4 by tilting the handle 4 sideways (arrow E <b> 1 direction) and opening the door 3. The second rotating plate 6B that rotates in the direction (arrow E1 direction) and meshes therewith also rotates in the arrow E2 direction. And the door connection bar 11 resists the urging | biasing of the 1st spring member 15 toward the 1st door part 3A side (arrow X1 direction shown in FIG. 5) via the rack 11c which meshes with the 2nd rotation board 6B. The protruding end 11a that moves and protrudes from the side end of the second door portion 3B enters the recess 31 and engages. The rotation of the second hinge 5B is restricted by the engagement between the recess 31 and the door connecting bar 11, and the divided first door portion 3A and the second door portion 3B are joined.

  Next, in the recess 31, the upper end 12 a of the first door locking bar 12 is pressed by the protruding end 11 a of the door connecting bar 11 to urge the second spring member 16 downward in the vertical direction (arrow Y <b> 1 direction). Move against. Then, the connecting member 13 connected to the lower end 12b of the first door locking bar 12 rotates clockwise on the paper surface around the rotation center 13c, and the second door locking bar 14 connected to the other end 13b. Is pulled up in the direction of the arrow Y2, and the lower end 14b (rotating ball 17) of the second door locking bar 14 comes out of the locking hole 21 of the door frame 2 and comes off.

  In this way, the first door portion 3A and the second door portion 3B adjacent to each other are joined by the door connecting bar 11, and the first door portion 3A and the door frame 2 are fixed by the door locking bars 12 and 14. The door 3 can be opened by the first hinge 5A in a state where the two door portions 3A and 3B are integrally coupled with each other (see FIG. 2).

  Next, when the door 3 is closed from the opened state shown in FIG. 2, the first spring member 15 is provided at the base end 11 b of the door connecting bar 11, so that the opening of the door 3 is finished and the handle 4 is released. Then, due to the action of the urging force that the first spring member 15 that has been pulled and extended tries to return to the normal state, the door connecting bar 11 comes out of the recessed portion 31 and returns to the original position, and the handle 4 also falls from the position where the handle 4 is tilted. Return to the original vertical position. As a result, the coupled state between the first door portion 3A and the second door portion 3B is released, and the second hinge 5B is rotatable.

  The second spring member 16 is also provided at the lower end 14b of the second door locking bar 14 by rotating the connecting member 13 to return to the original state by the biasing force and moving the second door locking bar 14 downward. The rotating sphere 17 that is in contact with the floor surface. Then, the rotating ball 17 rolls on the floor surface as the door 3 opens and closes and enters the locking hole 21 of the door frame 2 simultaneously with the closing of the first door portion 3A, thereby entering the first door. The part 3A is fixed to the door frame 2.

  As described above, when the door 3 is closed in the door frame 2, the coupling between the first door portion 3 </ b> A and the second door portion 3 </ b> B adjacent to each other is released by the door connecting bar 11 by closing the handle 4. At the same time, the first door portion 3A is fixed to the door frame 2 at a predetermined position by the door locking bars 12 and 14.

  That is, since the door 3 is divided into two door portions 3A and 3B and the two door portions 3A and 3B are supported by the plurality of hinges 5A and 5B, the fire door is provided between the staircase and the attached room. The pressure due to the pressure difference between the staircase and the attached chamber received by one door part surface is smaller than when the single door receives the pressure on the entire door surface when the attached room is pressurized and smoke-proof. . That is, it becomes less susceptible to the pressure difference on the door surface, and if there are two door portions 3A and 3B as in the present embodiment, the pressure on the door surface is nearly double even with the same door closing force as before. It can be closed against the difference and the closing ability will be improved.

Moreover, in the fire door 1, as shown to Fig.3 (a), (b), since the divided | segmented two door parts 3A and 3B can be closed in steps from the 1st door part 3A in order. The pressure from the attached chamber applied to the door surface can be reduced and closed, and the closing force can be reduced.
Moreover, since each door part 3A, 3B can be rotated in the direction which closes automatically by the effect | action of hinge 5A, 5B, by releasing the handle 4 and stopping the said opening operation, all automatically It is possible to close the door portions 3A and 3B.
Furthermore, when the door 3 is opened, the two door portions 3A and 3B can be joined together and easily opened, so that the necessary door opening force remains the same as in the past. There is no hindrance to usability. And, there is an advantage that it does not require time and effort for opening, and it is easy to plan the width necessary for evacuation.

  As described above, the fire door according to the present embodiment can be easily closed by reducing the pressure applied to the door surface at the stage of closing the door at the time of pressurization and smoke prevention in the attached room, and has a large force for opening the door even in daily life. There is an effect that becomes unnecessary. Since the pressure applied to one door surface is reduced and the closing force is increased, the influence of the pressure on the door surface can be suppressed, so that the fire door is opened by the pressure difference between the staircase and the attached room. Can be prevented.

As mentioned above, although the embodiment of the fire door by this invention was demonstrated, this invention is not limited to said embodiment, It can change suitably in the range which does not deviate from the meaning.
For example, although the door 3 is divided into two in this embodiment, the number of divisions is not particularly limited and can be changed, and a configuration in which three or more door portions are provided may be used.

Moreover, it is not limited to the structure of the door opening / closing mechanism 10 of this Embodiment. That is, the positions, lengths, shapes, and quantities of the door connecting bar 11, the first locking bar 12, the connecting member 13, and the second locking bar 14 are appropriately determined according to the size of the door, the number of divisions, and the like. Can be changed.
The first spring member 15 and the second spring member 16 can also be omitted, and an urging member having another configuration may be used.

DESCRIPTION OF SYMBOLS 1 Fire door 2 Door frame 3 Door 3A 1st door part (frame side door part)
3B 2nd door part 4 Handle 5A 1st hinge 5B 2nd hinge 6A 1st rotation board 6B 2nd rotation board 10 Door opening and closing mechanism 11 Door connection bar (door connection member)
12 First door locking bar (door locking member)
13 Connecting material 14 Second door locking bar (door locking member)
15 First spring member (first biasing member)
16 Second spring member (second biasing member)
17 Rotating ball 21 Locking hole 31 Recess

Claims (3)

A fire door provided with a door that can be freely opened and closed via a first hinge on a door frame,
The door is composed of a plurality of door parts divided in the lateral direction, the adjacent door parts are rotatably connected via a second hinge, and interlocked with a handle provided on the door part. With a door opening and closing mechanism,
The door opening / closing mechanism includes a door connecting member capable of restricting rotation of the adjacent door portions by the second hinge in conjunction with the opening / closing operation of the handle, and the door frame in conjunction with the door connecting member. and Tobiragakaritome member wherein the first door portion, which is connected via a first hinge that locking against the door frame, to stop the closing operation of the first door portion according to the first hinge, With
During the opening operation of the handle, the rotation of the door portions adjacent to each other is restricted by the door connecting member, and the fixing of the first door portion and the door frame is released by the door locking member,
When the handle is closed, the door connecting member releases the restriction on the rotation of the doors adjacent to each other so that the door is rotatable, and the door locking member causes the first door to be in a predetermined position. A fire door characterized by being fixed to a door frame. The said door connection member has a 1st biasing member, and controls rotation of the said door parts adjacent to said 1st biasing member at the time of opening operation of the said handle. The fire door according to 1. The door locking member has a second urging member, and interlocks with the door connecting member to fix the first door portion and the door frame against the second urging member. The fire door according to claim 1 or 2.

Images