JP7439217B2 - fire door - Google Patents

Description

The present invention relates to a fire door that has the function of preventing the spread of fire when a fire breaks out in a building.

Some doors installed in partition walls that partition the interior of buildings are called fire doors to prevent the spread of fire. A fire door is rotatably attached to a door frame fixed to a frame such as a partition wall using a connector such as a hinge.

A conventional fire door includes a frame formed in a rectangular frame shape, a front material and a back material disposed on both sides of the frame, and a core material filled between the front material and the back material. have. The frame body is constructed by framing a pair of metal vertical frames, an upper frame, and a lower frame. Further, the front material and the back material are made of metal plates, and are fixed to the front and back surfaces of the core material with an adhesive.
This fire door is configured such that the end of the fire door is rotatably connected to one vertical frame of the door frame by a connecting device such as a hinge, and can be opened and closed on the door frame around the axis of the hinge. ing.

When a fire door constructed in this way is heated in the event of a fire, the adhesive that fixes the front and back materials to the core material melts due to the heat, resulting in insufficient adhesive strength. Moreover, there is a problem that warping occurs due to the difference in elongation due to heat between the front material and the back material. When the front and back materials warp, a gap is created between the door frame and the fire door, and there is a risk that combustible gas may blow out into the next room through the gap, leading to the spread of fire.
Therefore, in order to solve such problems, various techniques as described below have been proposed in the past.

For example, Patent Document 1 (Japanese Unexamined Patent Publication No. 2013-091916) discloses a fire door that maintains reliability of fire spread prevention effect over a long period of time.

The fire door described in Patent Document 1 includes a structural material 60 between a pair of surface materials 21 facing each other, and a fire spreader having thermal expansion property on the prospective surface of the structural material 60 facing the opening frame 10. In a fire door 20 in which a fire prevention material 50 is disposed to ensure flame-blocking properties between the opening frame 10 and the opening frame 10 when the fire spread prevention material 50 heats and expands, the edges of a pair of surface materials 21 are placed close to each other. The clamping piece 22 facing the prospective surface of the structural member 60 is formed by bending in the direction of It is something.

Patent Document 2 (Japanese Unexamined Patent Publication No. 2016-223145) discloses a heat insulating door that can improve workability and versatility of parts and reduce manufacturing costs.

In the heat insulating door described in Patent Document 2, in the heat insulating door 10, each surface material 14 is formed so as to face the prospective surfaces of the aggregates 12a to 12d by bending their edges in a direction close to each other. A heat insulating component 24 is disposed between the projected surface and the bent piece portion 14a on the expected surface of the aggregate 12d, which is at least on the door edge side of the frame body 12. The component 24 is attached to the aggregate 12d by having leg portions 24b that are engaged with engagement holes 26 provided in the aggregate 12d.

Patent Document 3 (Japanese Utility Model Publication No. 62-071280) discloses that steel surface materials are pasted on both sides of a steel frame material in order to ensure the fire prevention function and give a beautiful finish to the surrounding area. Scraps made of a metal material with excellent workability, such as aluminum, are fixed to at least the side end surfaces of the formed door body by interposing steel fixing fittings that integrally fix the frame material and the surface material. A fire door is disclosed.

Further, Patent Document 4 (Japanese Utility Model Publication No. 61-4635) discloses a steel fire prevention panel made of steel materials such as two opposing surface steel plates, in which a fire prevention panel is provided on the prospective surface of the fire prevention panel. Disclosed is a steel fire prevention panel characterized in that a gas vent hole is formed to vent gas inside the panel, and the gas vent hole is covered with a sealing material that opens in response to heat generation due to a fire. ing.

JP2013-091916A Japanese Patent Application Publication No. 2016-223145 Publication No. 62-071280 Publication No. 61-4635

In the doors described in any of the above-mentioned patent documents, in order to prevent the door from warping in the event of a fire, a metal rectangular frame is used to increase the rigidity of the door. Therefore, there are disadvantages in that the productivity of the door decreases and the manufacturing cost increases. Additionally, conventional fire doors use edges to secure the facing to the frame. However, a door in which the edges are fixed around the door in this way to further increase its rigidity has the disadvantage that the design is poor.

The main object of the present invention is to provide a fire door that can prevent the spread of fire in the event of a fire.
Another object of the present invention is to provide a fire door that has good productivity and can reduce manufacturing costs.
Still another object of the present invention is to provide a fire door with excellent design.

(1)
A fire door according to one aspect is a door that is attached to a door frame so as to be openable and closable, and includes a facing member having a bent end, and a facing member having a bent end and arranged opposite to the facing member. It includes a backing material and a core material filled between the facing material and the backing material, and one end of the connecting plate is located at the upper end and/or lower end of the door end side and/or door end side of the fire door. fixed to the upper bent piece of the facing material, the other end of the connecting plate is fixed to the upper bent piece of the backing material, and/or one end of the connecting plate is fixed to the lower bent piece of the facing material, The other end of the connection plate is fixed to the lower bent piece of the backing material.

In this case, in order to prevent deformation in the event of a fire, conventional doors had a rectangular frame made of four reinforcing materials, which resulted in lower productivity and higher manufacturing costs. be.

In contrast, in the present invention, the upper bent piece of the surface material and the upper bent piece of the back material are fixed by a connecting plate at the upper end of the door end side and/or the door end side, and At the lower end of the door end and/or end of the fire door, the lower bent piece of the front material and the lower bent piece of the back material are fixed by a connecting plate, so that the fire door A door end side end portion and/or a door end side end portion of the front surface material and the back surface material are reinforced by a connecting plate.

Therefore, the fire door can be reinforced by the connection plate without using a square frame for reinforcing the door as in the conventional case, so productivity can be improved and manufacturing costs can be reduced. Moreover, it also passed the fire protection test for fire doors.

(2)
The fire door according to the first aspect of the invention may further include a reinforcing material disposed between the front material and the back material and on the door end side and the door end side.
In this case, the front material and the back material can be fixed to the reinforcing material to reinforce it and prevent deformation. The reinforcing material may be a metal member having a U-shaped cross section that opens inward, or a metal member having a R-shaped cross section. The cross-sectional shape of the reinforcing material is not limited at all.

(3)
In the fire prevention door according to the first aspect or the second invention, first bent pieces are formed at the door end side end portion and the door tip side end portion of the front material and the back material, respectively, and are bent in opposite directions. , a second bent piece is formed at the tip of the first bent piece and is bent inward, and the second bent piece of the front material and the second bent piece of the back material are in contact with each other. It may be close to each other.
In this case, both end portions (end portions on the door end side and end portions on the door tip side) of the front material and the back material can be reinforced. Therefore, both sides of the fire door can be reinforced without using edges. Furthermore, since no edges are used, the design of both ends of the fire door can be improved.

(A)
In the fire prevention door according to any of the above inventions, a connection plate is disposed at the upper end of the door end side of the fire prevention door, spanning between the upper bent piece of the surface material and the upper bent piece of the back material, One end of the connecting plate is fixed to the upper bent piece of the facing material, the other end of the connecting plate is fixed to the upper bent piece of the backing material, and the A connecting plate is disposed between the side bent piece and the lower bent piece of the back material, one end of the connecting plate is fixed to the lower bent piece of the facing material, and the other end of the connecting plate is fixed to the lower bent piece of the facing material. may be fixed to the lower bent piece of the back material.

In this case, in the present invention, the upper bent piece and/or the lower bent piece of the facing material and the upper bent piece and/or the lower bent piece of the backing material are arranged at the upper end and/or lower end on the door end side of the fire door. Since the side bending pieces are fixed by the connecting plate, the end portions of the front surface material and the back surface material of the fire door are reinforced by the connecting plate.

Therefore, the fire door can be reinforced by the connection plate without using a square frame for reinforcing the door as in the conventional case, so productivity can be improved and manufacturing costs can be reduced. Moreover, it also passed the fire protection test for fire doors.

(B)
In the fire door according to any of the above inventions, the end of the fire door is rotatably attached to the door frame by a pivot hinge device, and the upper end of the fire door on the end of the door is attached to the upper side of the surface material. A connecting plate is disposed between the bent piece and the upper bent piece of the back material, one end of the connecting plate is fixed to the upper bent piece of the facing material, and the other end of the connecting plate is fixed to the upper bent piece of the back material. A connecting plate is fixed to the upper bent piece, and is disposed at the lower end of the door end side of the fire door, spanning between the lower bent piece of the facing material and the lower bent piece of the backing material, One end of the connection plate may be fixed to the lower bent piece of the front material, and the other end of the connection plate may be fixed to the lower bent piece of the back material.

When the rear end of the fire door is rotatably attached to the door frame by a pivot hinge device, the front and back plates at the rear end of the fire door are connected to each other by the connecting part of the pivot hinge device. They are never concatenated.

In this case, the upper bent piece of the facing material and the upper bent piece of the backing material are fixed by the connection plate at the upper end of the fire door on the door end side, and the facing material is fixed at the lower end of the fire door on the door end side. Since the lower bent piece and the lower bent piece of the backing material are fixed by the connecting plate, the ends of the front side material and the backing material of the fire door on the door end side are reinforced by the connecting plate.
Therefore, even when a fire door is rotatably attached to a door frame using a pivot hinge device, the fire door can be reinforced with a connecting plate instead of using a square frame to reinforce the fire door as in the past. As a result, productivity is high and manufacturing costs can be reduced. Moreover, it also passed the fire protection test for fire doors. In addition to the pivot hinge device, a known opening/closing device such as a hinge can also be used.

(C)
In the fire prevention door according to any of the above inventions, each of the connection plates is formed of a metal plate, and each of the connection plates is an upper bent piece of the front material and the back material, and a lower bent piece of the front material and the back material. It may be fixed by a fixing member such as a screw, a rivet, or welding.

In this case, by simply using the metal connecting plate and fixing member, safety in the event of a fire can be improved, productivity can be improved, and manufacturing costs can be reduced.
Furthermore, by connecting the front surface material and the back surface material with the connection plate, it is possible to prevent the front surface material and the back surface material from warping in the event of a fire, and it is possible to improve safety in the event of a fire.

(D)
In the fire door according to any of the above inventions, the end portion of the fire door may be rotatably attached to the door frame by a hinge device.
In this case, at the end of the fire door, the front plate and the back plate are fixed to each other by a hinge device for rotatably attaching the fire door to the door frame. Therefore, in the event of a fire, the front plate and the back plate are prevented from warping at the end of the fire door.

(E)
In the fire door according to any of the above inventions, the upper end and the lower end of the end of the fire door are rotatably attached to the door frame by a first hinge device and a second hinge device, respectively. A connecting member that connects the front surface material and the back surface material may be provided at the center portion side end portion of the door end side end portion of the fire door.

In this case, the front material and the back material can be connected and reinforced by the connecting member.
(F)
In the fire prevention door according to any of the above inventions, a connecting member provided with a protrusion is disposed at the center of the door end side end of the fire prevention door, and one end of the connecting member has a first bent portion of the surface material. The door frame may be fixed to one piece, and the other end may be fixed to a first bent piece of the back material, and the door frame may be provided with a recess into which the protrusion fits.

In this case, the protrusion of the connecting member located in the center of the end of the fire door fits into the recess in the door frame, so in the event of a fire, pressure is applied to the fire door by flammable gas, etc. Even in such a case, since the fire door is connected by the hinge device and is fitted into the door frame, the fire door is prevented from warping and deforming.

FIG. 1 is a front view of a fire door according to an embodiment of the present invention, viewed from the indoor side. 2 is a cross-sectional view of the fire door shown in FIG. 1. FIG. FIG. 2 is a longitudinal cross-sectional view of the fire door shown in FIG. 1. FIG. 2 is an overall perspective view of the fire door shown in FIG. 1. FIG. FIG. 2 is a perspective view of essential parts of the fire door shown in FIG. 1. FIG. FIG. 2 is a sectional view of a main part of the fire door shown in FIG. 1. FIG. FIG. 2 is a front view of essential parts of the fire door shown in FIG. 1. FIG. FIG. 2 is a partially cutaway cross-sectional view of the fire door shown in FIG. 1; FIG. 2 is a longitudinal cross-sectional view of the fire door shown in FIG. 1. FIG. It is a perspective view of a connection member. FIG. 2 is a cross-sectional view showing a main part of a fire door with a connecting member fixed to the end of the door. It is a schematic diagram which shows the variation of the position which fixes a connection plate to a fire door.

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the same parts are given the same reference numerals. In addition, when the symbols are the same, their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

1 to 3 are schematic front views showing an example of a state in which a fire door 100 according to the present embodiment is attached to a door frame 10 of a partition wall 50 that partitions the inside of a building, and FIG. FIG. 1 is a cross-sectional view, and FIG. 3 is a longitudinal cross-sectional view of FIG. 1.

(Door frame 10)
The door frame 10 is fixed to an opening in a partition wall 50 that partitions the inside of a building. The door frame 10 is constructed by framing a pair of left and right vertical frames 14 and horizontal frames 12. The horizontal frame 12 and the vertical frame 14 constituting the door frame 10 can be made of an extruded material made of metal such as aluminum or an aluminum alloy, or a bent steel material.
A fire door 100 is disposed at the opening of the door frame 10, and is attached to a connector such as a hinge device 160 fixed to the vertical frame 14 of the door frame 10 so as to be openable and closable.

(Fire door 100)
As shown in FIGS. 2 to 6, the fire door 100 includes a front surface material 110 and a back surface material 120 arranged at a predetermined interval, and a core material 140 filled between the surface material 110 and the back surface material 120. and reinforcing members 130 disposed between the front surface material 110 and the back surface material 120 and on the door end side and the door end side. The front surface material 110 and the back surface material 120 are arranged in parallel with a constant interval.
Each member constituting the fire door 100 will be described in detail below.

(Surface material 110 and back material 120)
In this embodiment, the front surface material 110 and the back surface material 120 are rectangular plates made of metal plates such as thin steel plates. The material for the front surface material 110 and the back surface material 120 is preferably a fire-resistant metal plate, but is not particularly limited, and a plate material made of a fire-resistant material other than a metal plate may also be used.
In this embodiment, the thickness of the thin steel plate is preferably 0.2 mm or more and 2.0 mm or less.

The front surface material 110 has an L-shaped end bent, and the back surface material 120 has an L-shaped end bent and is disposed opposite to the front surface material 110. That is, upper bent pieces 112 and 122 are provided at the upper ends of the front surface material 110 and the back surface material 120, respectively, which are bent in opposite directions. The extension distance of the upper bent pieces 112, 122 and their cross-sectional shapes can be changed as appropriate.
In this embodiment, as shown in FIGS. 4 and 5, an opening 142 is provided between the upper bent piece 112 provided at the upper end of the surface material 110 and the upper bent piece 122 provided at the upper end of the back material 120. The lengths of the upper bent pieces 112 and 122 are set so that the upper bent pieces 112 and 122 are formed.

As shown in FIG. 4, lower bent pieces 114 and 124 are provided at the lower ends of the front surface material 110 and the back surface material 120, respectively, which are bent in opposite directions. The extension distance of the lower bent pieces 114, 124 and the cross-sectional shape thereof can be changed as appropriate. The lower bent pieces 114 are arranged so that an opening is formed between the lower bent pieces 114 provided at the lower end of the surface material 110 and the lower bent pieces 124 provided at the lower end of the back material 120. , 124 lengths are set.

As shown in FIGS. 4 to 7, first bends are formed in opposite directions at both end portions (door tip side end portion and door bottom side end portion) of the front material 110 and the back material 120. Pieces 116, 126 are formed. Furthermore, second bent pieces 118 and 128 are formed at the tips of the first bent pieces 116 and 126, respectively, and are bent inward.
In this embodiment, the first bent pieces 116 and 126 and the second bent piece 118 are attached to both ends of the front material 110 and the back material 120 (the end of the door and the end of the door). , 128 form a reinforcing portion with a U-shaped cross section. However, only the first bent pieces 116 and 126 are provided at both ends of the front material 110 and the back material 120 to form a reinforcing portion with an L-shaped cross section. may be formed. The cross-sectional shapes of the reinforcing portions provided at both end portions of the front surface material 110 and the back surface material 120 can be changed as appropriate depending on the purpose.

(core material 140)
A core material 140 is disposed between the front material 110 and the back material 120. As the core material 140, various conventionally used materials can be used. For example, a heat insulating resin material such as paper honeycomb, expanded polystyrene, urethane resin, phenol foam, aluminum hydroxide core, etc. can be used. The core material 140 is adhered to the inner surfaces of the surface material 110 and the back surface material 120 with an adhesive.

(Reinforcement material 130)
Between the front material 110 and the back material 120, reinforcing materials 130, 130 can be arranged at both ends of the front material 110 and the back material 120. In such a case, the reinforcing material 130 can be formed of metal such as aluminum, aluminum alloy, steel, or the like. The reinforcing member 130 can be made of, for example, an elongated metal member with a U-shaped cross section and open on the inside, or can also be made of a long metal member with a R-shaped cross section, such as a square pipe. The cross-sectional shape of the reinforcing material 130 can be changed as appropriate depending on the purpose. In particular, extruded sections made of aluminum or aluminum alloys can be used.
The reinforcing member 130 is configured to have a substantially uniform cross-sectional shape over its entire length. In this embodiment, the reinforcing material 130 is disposed between the front material 110 and the back material 120 and on the door end side and the door end side, so that the fire door 100 can be reinforced.

As shown in FIGS. 4 to 6, the reinforcing material 130 disposed on the door edge side of the fire door 100 includes a side piece 132 extending in the expected direction (thickness direction) of the fire door 100, and a side piece 132 extending in the direction of the fire door 100 (thickness direction). It has facing pieces 134 and 136 extending from both ends of the fire door 132 toward the door end side in a form that faces each other along the facing face of the fire door 100.

Further, the reinforcing material 130 disposed on the door end side of the fire door 100 is connected to a side piece (not shown) extending in the expected direction (thickness direction) of the fire door 100 and from both ends of the side piece. The fire prevention door 100 has facing pieces extending toward the door edge side in a form that faces each other along the facing surface of the fire door 100.

When reinforcing materials 130, 130 are arranged between the front material 110 and the back material 120 at both ends of the front material 110 and the back material 120, the second bent piece 118 of the front material 110 The tips of the tip and the second bent piece 128 of the back material 120 abut on the side piece 132 of the reinforcing material 130, and the second bent piece 118 of the face material 110 and the second bent piece 128 of the back material 120 contact each other. The curved pieces 128 are brought into contact with each other (FIG. 6).

(Connection plate 150)
The connection plate 150 used in this embodiment is formed of a plate-shaped metal member. As shown in FIGS. 5 and 7, on the upper side of the reinforcing member 130 on the door end side of the fire door 100, between the upper bent piece 112 of the surface material 110 and the upper bent piece 122 of the back material 120. A connecting plate 150 is provided. One end of the connecting plate 150 is fixed to the upper bent piece 112 of the surface material 110, and the other end of the connecting plate 150 is fixed to the upper bent piece 122 of the backing material 120. The connection plate 150 is fixed to the upper bent pieces 112 and 122 of the front surface material 110 and the back surface material 120 by fixing members 152 such as screws. Note that although screws are used as the fixing members 152 in this embodiment, fixing members such as rivets and welding may be used in addition to screws, and the fixing means is not limited at all.

Further, below the reinforcing member 130 on the door end side of the fire door 100, a connecting plate 150 is disposed between the lower bent piece 114 of the surface material 110 and the lower bent piece 124 of the back material 120. It is set up. One end of the connecting plate 150 is fixed to the lower bent piece 114 of the surface material 110, and the other end of the connecting plate 150 is fixed to the lower bent piece 124 of the backing material 120. The connection plate 150 is fixed to the lower bent piece 114 of the surface material 110 and the lower bent piece 124 of the back material 120 by fixing members such as screws, rivets, and welding.

In this embodiment, the front end of the fire door 100 is connected to the front material 110 and the back material 120 by a hinge device 160. Therefore, only on the upper and lower sides of the reinforcing member 130 on the door end side of the fire door 100, the upper bent piece 112 and the lower bent piece 114 of the surface material 110 and the upper bent piece 122 and the lower bent piece of the back material 120 are formed. A connecting plate 150 is disposed and fixed between the bent piece 124 and the bent piece 124.

However, on the upper and lower sides of the reinforcing member 130 on the door end side of the fire door 100, the upper bent piece 112 and the lower bent piece 114 of the surface material 110 and the upper bent piece 122 and the lower bent piece of the back material 120 A connecting plate 150 may be disposed and fixed between the bent piece 124 and the bent piece 124.
Moreover, one end and the other end of the connection plate 150 mean a region including one end and the other end of the connection plate 150, and do not mean only the tip of the connection plate 150. Therefore, one end side and the other end side of the connection plate 150 are also included.

FIGS. 12(a) to 12(g) are schematic diagrams showing variations in the position of fixing the connecting plate 150 to the fire door 100. The present invention includes embodiments in which connection plates 150 are attached to various locations on the fire door 100, as shown in FIGS. 12(a) to 12(g).

FIG. 12(a) shows the upper bent piece 112 and lower bent piece 114 of the surface material 110 and the upper bent piece 122 and lower bent piece 124 of the back material 120 on the door end side of the fire door 100. A connecting plate 150 is disposed and fixed between them.

FIG. 12(b) shows the upper bent piece 112 and the lower bent piece 114 of the surface material 110 and the upper bent piece 122 and the lower bent piece of the back material 120 on the door end side and door end side of the fire door 100. A connecting plate 150 is disposed and fixed between the curved piece 124 and the curved piece 124. That is, connection plates 150 may be arranged near the four corners of the fire door 100, respectively, and the front material 110 and the back material 120 may be connected by the connection plates 150.

Further, as shown in FIG. 12(c), only on the door end side of the fire door 100, the upper bent piece 112 and the lower bent piece 114 of the surface material 110 and the upper bent piece 122 and the lower bent piece of the back material 120. A connecting plate 150 may be disposed and fixed between the side bending piece 124 and the connecting plate 150 .

Furthermore, as shown in FIGS. 12(d) and 12(e), a connecting plate 150 is arranged near the diagonal corner of the fire door, and the front material 110 and the back material 120 are attached to the connecting plate 150. They may be connected and fixed together.
Further, as shown in FIG. 12(f), only the upper bent pieces 112, 122 of the front surface material 110 and the back surface material 120 may be connected by a connecting plate 150, or as shown in FIG. 12(g). In this way, only the lower bent pieces 114 and 124 of the front surface material 110 and the back surface material 120 may be connected by the connection plate 150.

Furthermore, one or more connecting plates 150 are arranged at any location where reinforcement is required other than those shown in FIGS. You may also do so.

Specifically, in a hinged door having an operation handle 170, if the hinge device 160 is installed at three locations on the door end side (FIG. 1), the connecting plate 150 is installed at two locations on both the upper and lower ends of the door end side. It is preferable that the
That is, at the operation handle 170, the front material 110 and the back material 120 are fixed by the operation handle 170.

In addition, in a case where the hinge device 160 is installed at two places on the door end side in a hinged door having the operating handle 170, the connecting plate 150 is installed at two places on the upper and lower ends of the door end side, and at both upper and lower ends of the door end side. Preferably, it is installed at one location in the center. Further, the connecting plate 150 provided at the center of both upper and lower ends on the door end side may be replaced with a connecting member further provided with a protrusion 210. In this case, as shown in FIG. 11, the door frame 10 is provided with a recess 22 into which the protrusion 210 fits. Details will be described later.

Furthermore, if the fire door 100 is not provided with the operation handle 170, it is preferable to further provide the connecting plates 150 at the center of both upper and lower ends of the door.
Furthermore, when the fire door 100 is a sliding door, since it does not have the operating handle 170, the connecting plate is placed at three locations on the top and bottom ends and at the center, and at three locations on the door end at both top and bottom ends and at the center. It is preferable to provide them at three locations.

Note that the shape and size of the connecting plate 150 can be changed as appropriate. For example, it may be formed of a rectangular metal member or a square metal member.

(Hinge device 160)
As shown in FIGS. 1 and 2, the end of the fire door 100 is rotatably attached to the door frame 10 by a hinge device 160. That is, the reinforcing frame 130 located on the door end side of the fire door 100 is rotatably connected to the vertical frame 14 of the door frame 10 by the hinge device 160.

In the present embodiment, the fire door 100 is connected to the door frame 10 by the hinge devices 160 in three upper and lower places, but it may be connected by two hinge devices 160 in the upper and lower places, or it can be connected by the hinge devices 160 in four or more places. You may.

The hinge device 160 used in this embodiment is a so-called flag hinge. The hinge device 160 is configured by providing vanes at both ends of a hinge shaft. The blade plate has a rectangular flat plate formed of metal, and is configured to be relatively rotatable about the axis of the hinge shaft.

With the axis of the hinge shaft aligned along the longitudinal direction of the reinforcing member 130, one wing board is attached to the prospective surface of the reinforcing frame 130, and the other wing board is attached to the prospective surface of the vertical frame 14 of the door frame 10. ing.

Furthermore, the fixing member of the vane is fixed to both the front material 110 and the back material 120.
The fire door 100 supported by the vertical frame 14 of the door frame 10 by the hinge device 160 can rotate around the hinge axis.

(Operation handle 170 and locking device 180)
An operation handle 170 and a locking device 180 are provided substantially at the central end of the fire door 100 on the door end side, and are fixed to the reinforcing member 130 on the door end side.

In this way, the fire door 100 includes the front surface material 110 and the back surface material 120, and the core material 140 is provided inside the fire door in a form sandwiched between the front surface material 110 and the back surface material 120. Metal reinforcing members 130 are provided between the backing material 120 and reinforcing both sides of the core material 140.

In the fire door 100 according to the present invention, on the upper and lower sides of the reinforcing member 130 on the door end side of the fire door 100, the upper bent piece 112 and the lower bent piece 114 of the surface material 110 and the upper bent piece 114 of the back material 120 are arranged. The bent piece 122 and the lower bent piece 124 are connected by a connecting plate 150. With such a configuration, the reinforcing members 130, 130 on both sides of the fire door 100 can be connected and reinforced by the upper bent pieces 112, 122 and the lower bent pieces 114, 124. Therefore, even if, for example, the surface material 110 side of the fire door 100 is heated by the heat of the fire when a fire occurs, it is possible to prevent the fire door from warping and deforming.

That is, the connection structure between the surface material 110 and the back material 120 and the reinforcing materials 130 and 130 is such that the upper bent piece 112 and the lower bent piece 114 of the surface material 110 are connected to the back material 120 through the connection plate 150. Since it is maintained by the upper bent piece 122 and the lower bent piece 124, even when the fire door 100 receives heat from a fire, the front material 110 and the back material 120 are prevented from warping or deforming due to heat. I can do it. Therefore, although the frame member having a U-shaped cross section is not fixed to the upper and lower ends of the fire door, the fire prevention performance can be improved.

Further, at the door end side end portion and the door end side end portion of the fire door 100, the first bent piece 116 of the front material 110 and the first bent piece 126 of the back material 120 are brought into abutted state. Reinforced. Therefore, there is no need to fix and reinforce the edge (or cover member) on the prospective surface of the end of the fire door 100 on the door front side, so that the design of the fire door can be improved.

In the above embodiment, the case where the end of the fire door 100 is rotatably attached to the door frame 10 by the hinge device 160 is shown, but the end of the fire door 100 is rotatably attached to the door frame. When it is rotatably attached by a pivot hinge, as shown in FIG. 12(b), the upper bent piece 112 of the facing material 110 and the A connecting plate 150 may be disposed and fixed between the lower bent piece 114 and the upper bent piece 122 and lower bent piece 124 of the back material 120.

That is, connection plates 150 may be arranged near the four corners of the fire door 100, respectively, and the front material 110 and the back material 120 may be connected by the connection plates 150. Furthermore, in addition to the four corners, connection plates 150 may be provided at the center of the upper and lower ends of the fire door 100 to connect the front surface material 110 and the back surface material 120.

Also in this case, the corners of the front surface material 110 and the back surface material 120 of the fire door 100 on the door side are reinforced by the connecting plate 150, so that the square frame-shaped frame for reinforcing the fire door 100 is used as in the conventional case. The fire door 100 can be reinforced by the connecting plate 150 without using the connecting plate 150.
Note that in place of the pivot hinge, a known opening/closing device such as a hinge may be used.

Furthermore, in the case of a fire, the surface temperature of one of the front surface material 110 and the back surface material 120 of the fire door 100 becomes higher than that of the other surface material, and therefore thermal expansion occurs. As a result, conventional doors are warped and deformed significantly, creating a gap between the door frame and the door frame. However, in the fire door 100 of this embodiment, the front material 110 and the back material Since the connecting plates 150 are connected and reinforced across the space, it is possible to prevent the fire door 100 from being significantly deformed due to bending of the connecting plates 150 when the front material 110 or the back material 120 is thermally expanded. .

That is, even if one of the front surface material 110 or the back surface material 120 is expanded, the connection plate 150 having a flat plate shape is deformed, and the distance between the front surface material 110 or the back surface material 120 can be maintained. On the other hand, if the connecting plate 150 is formed not in a flat plate shape but in a U-shaped frame material or the like, the connecting plate 150 will not be deformed and the connecting plate 150 can be fixed from either the front material 110 or the back material 120. A problem arises in that the fixing member 152, such as a screw, comes off. In this embodiment, this problem can be suppressed.
Further, in the above embodiment, the reinforcing material 130 is provided between the front material 110 and the back material 120 and on the door edge side and the door end side, but the reinforcing material may not be provided, or the reinforcing material may not be provided. A reinforcing material may be provided only on one of the front side and the door end side.

(Other embodiments)
In the embodiment described above, the fire door 100 is connected to the door frame 10 by hinge devices 160 at three upper and lower locations.
When the fire door 100 is connected to the door frame by the upper and lower hinge devices 160, the front material 110 and the back material 120 of the fire door 100 are connected by the connecting plate 150 between the upper and lower hinge devices 160. It may be configured as follows. That is, when three hinge devices are provided, the connecting plate 150 may be provided in place of the hinge device 160 provided at the center of the fire door 100 on the door end side.
In this case, a metal plate-shaped connection plate 150 is arranged on the outside of the first bent piece 116 of the front material 110 and the first bent piece 126 of the back material 120, and the first bent piece 116 of the front material 110 and the back It may be fixed to the first bent piece 126 of the material 120 with a fixing member 152 such as a screw.

(Yet other embodiments)
As shown in FIGS. 10 and 11, a connecting member 200 having a fitting portion 210 (protrusion or recess) formed on the end face of the fire door 100 is fixed, and the door is placed at a position corresponding to the connecting member 200. A connecting tool 20 having a fitted portion (a recess or a protrusion) that can fit into a fitting portion 210 (a protrusion or a recess) of the connecting member 200 may be fixed to the vertical frame 14 of the frame 10 . In this case, the connecting member 200 is fixed to the first bent pieces 116 and 126 of the front material 110 and the back material 120 with screws or the like.
When the fire door 100 is opened or closed, the fitting part 22 of the connecting member 20 fixed to the door frame 10 is formed so as not to come into contact with the fitting part 210 of the connecting member 200 fixed to the fire door 100. has been done. In addition, when the fire door 100 is thermally expanded due to thermal deformation or the like and moves in a warped manner, the fitting portion 210 of the connecting member 200 fixed to the fire door 100 is inserted into the connecting member 20 fixed to the door frame 10. It is configured to abut against the joining portion 22 . Note that 220 in the figure is a screw hole.

Therefore, the connecting member 200 connects the front surface material 110 and the back surface material 120 of the fire prevention door 100 and improves the strength, so even if the fire prevention door 100 is deformed such as warping in the event of a fire, the fire prevention door 100 and the door frame 10 This can prevent gaps from forming between the two.

(Yet other embodiments)
Conventional doors may be provided with an electric lock. When an electric lock is provided, a relay device for connecting wiring for the electric lock is provided at the upper end of the door. The relay device is placed between the front material 110 and the back material 120, and is bonded to the front material 110 and the back material 120 with an adhesive.
However, there has been a problem in that in the event of a fire, the adhesive around the relay device melts, causing the surface material 110 and back material 120 around the relay device to separate.

In this embodiment, the connecting plate 150 is configured to fix the front surface material 110 and the back surface material 120 at the upper and lower ends of the relay device. With this configuration, even if the adhesive used to bond the relay device to the front surface material 110 and the back surface material 120 melts in the event of a fire, the relay device can be securely fixed inside the fire door 100. can do.
Note that the connection plate 150 may be screwed to the relay device via the front surface material 110 and the back surface material 120.
(Yet other embodiments)

In the present invention, the door frame 10 corresponds to a "door frame," the fire door 100 corresponds to a "fire door," the front material 110 corresponds to a "front material," and the back material 120 corresponds to a "back material." Correspondingly, the reinforcing material 130 corresponds to a "reinforcing material", the core material 140 corresponds to a "core material", and the connection plate 150 corresponds to a "connection plate".

Although a preferred embodiment of the present invention is as described above, the present invention is not limited to the embodiment shown above. It will be appreciated that various other embodiments may be made without departing from the spirit and scope of the invention. Further, in this embodiment, the functions and effects of the configuration of the present invention are described, but these functions and effects are merely examples and do not limit the present invention.

10 Door frame 12 Horizontal frame 14 Vertical frame 50 Partition wall 100 Fire door 110 Surface material 120 Back material 130 Reinforcing material 140 Core material 150 Connection plate 160 Hinge device

Claims (2)

A fire door attached to a door frame so as to be openable and closable,
A surface material with bent ends;
a back material having bent ends and disposed opposite to the surface material;
a core material filled between the surface material and the back material;
electric lock and
a relay device for connecting wiring for the electric lock at the upper part of the fire door on the door end side;
A door end side end of the fire door is rotatably attached to the door frame by a pivot hinge device or a hinge,
A connection plate is disposed at the upper end of the door end side and/or the door end side of the fire door, spanning between the upper bent piece of the facing material and the upper bent piece of the backing material,
one end of the connection plate is fixed to the upper bent piece of the surface material,
The other end of the connection plate is fixed to the upper bent piece of the back material,
The connecting plate is disposed at the lower end of the door end side and/or door end side of the fire door, spanning between the lower bent piece of the facing material and the lower bent piece of the backing material. ,
one end of the connection plate is fixed to the lower bent piece of the surface material,
The other end of the connection plate is fixed to the lower bent piece of the backing material,
The relay device is a fire prevention door in which the front surface material and the back surface material are bonded with an adhesive, or screwed by the connection plate via the front surface material and the back surface material. A connecting member provided with a protrusion is disposed in the center of the end of the fire door,
The connecting member has one end fixed to the first bent piece of the front material, the other end fixed to the first bent piece of the back material, and the protrusion fits into the door frame. 2. The fire door according to claim 1, further comprising a recess.

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