JP7181057B2 - fire door - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire door that has a function of preventing the spread of fire when a building catches fire.

2. Description of the Related Art There is a door called a fire door for preventing the spread of fire as a door provided in a partition wall that partitions the interior of a building. 2. Description of the Related Art A fire door is rotatably attached to a door frame fixed to a frame such as a partition wall by a connector such as a hinge.

A conventional fire door includes a frame formed in the shape of a square frame, a surface material and a back surface material respectively arranged on both front and back surfaces of the frame, a core material filled between the surface material and the back surface material, have. The frame is constructed by framing a pair of metal vertical frames, an upper frame and a lower frame. The surface 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 on the side of the door trailing edge is rotatably connected to one vertical frame of the door frame by a connector such as a hinge so that the door frame can be opened and closed around the axis of the hinge. ing.

In a fire door constructed in this manner, when the fire door is heated in the event of a fire, the adhesive that secures the surface material and the back material to the core material melts due to the heat, resulting in insufficient adhesion. Also, there is a problem of warpage due to the difference in elongation due to heat between the surface material and the back material. Warping of the front and back materials creates a gap between the door frame and the fire door, and combustible gas may blow out from the gap into the next room, leading to the spread of fire.
Therefore, in order to solve such problems, the following various techniques have been conventionally proposed.

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

The fire door described in Patent Document 1 includes a structural member 60 between a pair of surface members 21 facing each other, and a fire spreader having heat expandability on a prospective surface of the structural member 60 facing the opening frame 10. In a fire door 20 provided with a fire prevention material 50 so as to ensure flame insulation between the opening frame 10 and the fire spread prevention material 50 when the fire spread prevention material 50 is thermally expanded, the edges of the pair of surface materials 21 are brought close to each other. The sandwiching piece portion 22 facing the prospective surface of the structural member 60 is formed by bending in the direction of bending, and both side edge portions of the fire spread prevention material 50 are arranged between the sandwiching piece portion 22 and the prospective surface of the structural member 60. It is.

Patent Document 2 (Japanese Unexamined Patent Application Publication No. 2016-223145) discloses an insulated door capable of improving workability and versatility of parts and reducing 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 estimated surfaces of the aggregates 12a to 12d by bending the edges thereof in a direction to approach each other. A heat insulating component 24 is arranged between the projected surface of the aggregate 12d, which is at least the door tip side of the frame body 12, and the folded piece portion 14a to provide heat insulation. The component 24 is attached to the aggregate 12d with legs 24b that engage with engagement holes 26 provided in the aggregate 12d.

In Patent Document 3 (Japanese Utility Model Laid-Open No. 62-071280), a steel surface material is attached to both sides of a steel frame material in order to secure a fireproof function and clean the surrounding finish. At least on the side end face of the formed door body, steel fixtures for integrally fixing the frame material and the surface material are interposed to fix offcuts made of a metal material with excellent workability such as aluminum. A fire door is disclosed.

In addition, Patent Document 4 (Japanese Utility Model Publication No. 61-4635) describes a steel fire panel made of steel materials such as two surface steel plates facing each other, and a fire panel Disclosed is a steel fireproof panel characterized by having a gas vent hole for venting gas from inside, and the gas vent hole is closed with a sealing material that opens according to heat generated by a fire. ing.

JP 2013-091916 A JP 2016-223145 A Japanese Utility Model Laid-Open No. 62-071280 Japanese Utility Model Publication No. 61-4635

In the doors described in any of the above patent documents, in order to prevent the door from warping in the event of a fire, a metal square frame is used to increase the rigidity of the door. Therefore, there is a drawback that the productivity of the door is lowered and the manufacturing cost is increased. Additionally, conventional fire doors use edges to secure the facing to the frame. However, such a door in which the edge is fixed around the periphery of the door to further increase rigidity has a drawback of poor design.

SUMMARY OF THE INVENTION A primary 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 which is highly productive and can be manufactured at a reduced cost.
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 openable and closable attached to a door frame, and includes a facing member with a bent end portion and a facing member with a bent end portion and facing the facing member. A backing material and a core material filled between the fronting material and the backing material are included, and one end of the connecting plate is positioned at the upper end and/or the lower end on the leading end side and/or the trailing end side of the fire door. fixed to the upper folded piece of the facing material, the other end of the connecting plate is fixed to the upper folded 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 connecting 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, the conventional door had four reinforcing members as a framework to form a square frame, which resulted in low productivity and high manufacturing costs. be.

On the other hand, in the present invention, the upper bent piece of the surface material and the upper bent piece of the back material are fixed by the connecting plate at the upper end portion of the door tip side and/or the door tail side of the fire door, and Since the lower bent piece of the surface material and the lower bent piece of the back material are fixed by the connection plate at the lower end of the door tip side and/or the door trailing side of the fire door, The leading edge and/or the trailing edge of the front and back materials are reinforced by connecting plates.

Therefore, the fire door can be reinforced by the connection plate without using a square frame-shaped frame for reinforcing the door as in the conventional art, so that the productivity is good and the manufacturing cost can be reduced. Moreover, the fireproof door was within the acceptable range in the fireproof test.

(2)
The fire door according to the invention of one aspect may further include a reinforcing member disposed between the surface member and the back member and on the door tip side and the door trailing side.
In this case, it is possible to prevent deformation by fixing the surface material and the back material to the reinforcing material for reinforcement. The reinforcing member may be a metal member having a U-shaped cross section that opens inward, or a metal member having a square-shaped cross section. The cross-sectional shape of the reinforcing material is not limited at all.

(3)
In the fire door according to the first aspect or the second aspect of the invention, first bent pieces are formed that are bent in opposite directions to the door tail side end portion and the door tip side end portion of the surface material and the back material. , second bent pieces bent inward are formed at the tip portions of the first bent pieces, and the second bent pieces of the surface material and the second bent pieces of the back material are brought into contact with each other. may be in contact with each other.
In this case, it is possible to reinforce both side end portions (door tail side end portion and door tip side end portion) of the surface material and the back material. Therefore, both sides of the fire door can be reinforced without using edges. Moreover, since no edge is used, the design of both side ends of the fire door can be enhanced.

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

In this case, according to the present invention, the upper and/or lower bent pieces of the surface material and the upper and/or lower bent pieces of the back material are provided at the upper end and/or lower end of the door tip side of the fire door. Since the side bent pieces are fixed by the connection plate, the end portions of the front surface material and the back surface material of the fire door are reinforced by the connection plate.

Therefore, the fire door can be reinforced by the connection plate without using a square frame-shaped frame for reinforcing the door as in the conventional art, so that the productivity is good and the manufacturing cost can be reduced. Moreover, the fireproof door was within the acceptable range in the fireproof test.

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

When the door trailing end of the fire door is rotatably attached to the door frame by a pivot hinge device, the surface plate and the back plate of the door trailing end of the fire door are connected to each other by the connecting portion of the pivot hinge device. not be concatenated.

In this case, 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 portion of the door trailing side of the fire door, and the surface material Since the lower bent piece of the fire door and the lower bent piece of the backing material are fixed by the connecting plate, the ends of the front surface material and the backing material of the fire door are reinforced by the connecting plate.
Therefore, even when the fire door is rotatably attached to the door frame by the pivot hinge device, the fire door is reinforced by the connection plate without using a square frame-shaped frame for reinforcing the fire door as in the conventional art. Therefore, the productivity is good and the manufacturing cost can be reduced. Moreover, the fireproof door was within the acceptable range in the fireproof test. In addition to the pivot hinge device, a known opening/closing device such as a hinge can also be used.

(C)
In the fire door according to any one of the above inventions, each of the connection plates is formed of a metal plate material, and the connection plates are upper bent pieces and lower bent pieces of the surface material and the back material, respectively. It may be fixed by fixing members such as screws, rivets, and welding.

In this case, only by using metal connection plates and fixing members, it is possible to enhance safety in case of fire, improve productivity, and reduce manufacturing costs.
In addition, by connecting the surface material and the back material with the connection plate, it is possible to prevent the surface material and the back material from warping in the event of a fire, thereby enhancing safety in the event of a fire.

(D)
In the fire door according to any one of the above inventions, the door trailing end of the fire door may be rotatably attached to the door frame by a hinge device.
In this case, the top plate and the back plate are fixed to each other at the door trailing end of the fire door by a hinge device for rotatably attaching the fire door to the door frame. Therefore, in the event of a fire, warping of the surface plate and the rear surface plate at the end portion of the fire door on the trailing edge side is suppressed.

(E)
In the fire door according to any one of the above inventions, the upper end and the lower end of the door tail side end of the fire door are rotatably attached to the door frame by the first hinge device and the second hinge device, respectively. A connection member may be provided for connecting the surface material and the back material at the central portion side end portion of the door bottom side end portion of the fire door.

In this case, the connecting member can connect and reinforce the surface material and the back material.
(F)
In the fire door according to any one of the above inventions, a connection member provided with a projection is disposed in the central portion of the door tail side end portion of the fire door. The door frame may be fixed to the piece, the other end may be fixed to the first bent piece of the backing material, and the door frame may be provided with a recess so that the protrusion is fitted.

In this case, since the projection of the connecting member provided at the center of the door trailing edge of the fire door fits into the recess of the door frame, the fire door is pressurized by combustible gas or the like in the event of a fire. Even in such a case, since the fire door is fitted to the door frame in addition to being connected by the hinge device, the fire door is prevented from being warped and deformed.

It is the front view which looked at the fire door which concerns on one Embodiment of this invention from the indoor side. FIG. 2 is a cross-sectional view of the fire door shown in FIG. 1; FIG. 2 is a longitudinal 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. 2 is a perspective view of a main part of the fire door shown in FIG. 1; FIG. 2 is a cross-sectional view of a main part of the fire door shown in FIG. 1; FIG. 2 is a front view of a main part of the fire door shown in FIG. 1; FIG. 2 is a cross-sectional view, partially cut away, of the fire door shown in FIG. 1; FIG. 2 is a longitudinal sectional view of the fire door shown in FIG. 1; It is a perspective view of a connection member. FIG. 4 is a transverse cross-sectional view showing a main part where a connecting member is fixed to the end portion of the door trailing edge of the fire door; It is a schematic diagram which shows the variation of the position which fixes a connection plate to a fire door.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals are given to the same parts. Moreover, in the case of the same reference numerals, 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 this embodiment is attached to a door frame 10 of a partition wall 50 that partitions the interior of a building, and FIG. 1, and FIG. 3 is a longitudinal sectional view of FIG.

(door frame 10)
The door frame 10 is fixed to an opening of a partition wall 50 that partitions the interior of the 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 that constitute the door frame 10 can be made of an extruded material formed from a metal such as aluminum or an aluminum alloy, or a member made by bending a steel material.
A fire door 100 is disposed in 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 that the fire door 100 can be opened and closed.

(Fire door 100)
As shown in FIGS. 2 to 6, the fire door 100 includes a surface material 110 and a back material 120 arranged at a predetermined interval, and a core material 140 filled between the surface material 110 and the back material 120. and reinforcing members 130 arranged between the surface member 110 and the back member 120 and on the door leading end side and the door trailing end side. The surface material 110 and the back 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 the present embodiment, the surface material 110 and the back material 120 are rectangular plate members made of metal plates such as thin steel plates. The material of the surface material 110 and the back material 120 is preferably a fire-resistant metal plate, but is not particularly limited, and a plate material composed of a fire-resistant material other than a metal plate can also be used.
In the present embodiment, the thin steel plate preferably has a thickness of 0.2 mm or more and 2.0 mm or less.

The surface material 110 is bent into an L-shape at its end, and the back material 120 is bent into an L-shape at its end and arranged to face the surface material 110 . That is, the upper ends of the surface material 110 and the back material 120 are provided with upper bent pieces 112 and 122 that are bent in opposite directions. The extension distance of the upper bent pieces 112 and 122 and the cross-sectional shape thereof can be changed as appropriate.
In this embodiment, as shown in FIGS. 4 and 5, an opening 142 is formed between an upper bent piece 112 provided at the upper end of the surface material 110 and an upper bent piece 122 provided at the upper end of the back material 120. The length of each upper bent piece 112, 122 is set so as to be formed.

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

As shown in FIGS. 4 to 7 , first folds are formed at both side ends (door tip side end and door bottom side end) of the surface material 110 and the back material 120 in opposite directions. Strips 116, 126 are formed. In addition, second bent pieces 118 and 128 bent inward are formed at the tip portions of the first bent pieces 116 and 126, respectively.
In the present embodiment, the first bent pieces 116 and 126 and the second bent piece 118 are attached to both side ends (door tip side end and door bottom side end) of the surface material 110 and the back material 120. , 128 form a reinforcing portion with a U-shaped cross section, but only the first bent pieces 116 and 126 are provided at both side ends of the surface member 110 and the back member 120 to form a reinforcing portion with an L-shaped cross section. may be formed. The cross-sectional shape of the reinforcing portions provided on both side ends of the surface material 110 and the back material 120 can be appropriately changed according to the purpose.

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

(Reinforcing material 130)
Between the surface material 110 and the back material 120, reinforcing materials 130, 130 can be arranged on both side ends of the surface material 110 and the back material 120. As shown in FIG. In such cases, the stiffener 130 may be made of metal such as aluminum, aluminum alloy, steel, or the like. The reinforcing member 130 may be, for example, an elongated metal member having a U-shaped cross section with an open inner side, or may be an elongated metal member such as a square pipe having a square-shaped cross section. The cross-sectional shape of the reinforcing member 130 can be appropriately changed according to the purpose. In particular, extruded profiles made of aluminum or aluminum alloys can be used.
Reinforcing member 130 is configured to have a substantially uniform cross-sectional shape over its entire length. In this embodiment, stiffeners 130 are disposed between the face member 110 and the back member 120 and on the door leading and trailing sides to reinforce the fire door 100 .

As shown in FIGS. 4 to 6, the reinforcing member 130 disposed on the door tip side of the fire door 100 includes a side piece 132 extending in the direction of projection (thickness direction) of the fire door 100 and a side piece 132 extending in the thickness direction. 132 from both ends of the fire door 100 along the viewing surface of the fire door 100 and extending toward the door trailing edge side.

In addition, the reinforcing member 130 disposed on the door tail side of the fire door 100 includes a side piece (not shown) extending in the direction of projection (thickness direction) of the fire door 100, and both ends of the side piece. and a viewing piece extending toward the door tip side in a facing manner along the viewing surface of the fire door 100. - 特許庁

Between the surface material 110 and the back material 120, when reinforcing materials 130, 130 are arranged at both side ends of the surface material 110 and the back material 120, the second bent piece 118 of the surface material 110 The tip of the second bent piece 128 of the backing member 120 and the tip of the second bent piece 128 of the backing member 120 are in contact with the side piece 132 of the reinforcing member 130 , and the second bent piece 118 of the fronting member 110 and the second bent piece 128 of the backing member 120 are in contact with each other. The curved pieces 128 abut each other (FIG. 6).

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

In addition, a connecting plate 150 is arranged between the lower bent piece 114 of the surface material 110 and the lower bent piece 124 of the back material 120 on the lower side of the reinforcing member 130 on the door edge side of the fire door 100 . is set. 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 back material 120 . The connecting 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 addition, in this embodiment, the surface material 110 and the back material 120 are connected by a hinge device 160 at the end portion of the fire door 100 on the trailing edge side. Therefore, only on the upper side and the lower side of the reinforcing member 130 on the door tip 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 side of the back material 120 are bent. A connecting plate 150 is arranged and fixed between the bent pieces 124 .

However, on the upper side and the lower side of the reinforcing member 130 on the door tail side of the fire door 100, the upper bent piece 112 and the lower bent piece 114 of the surface member 110 and the upper bent piece 122 and the lower side of the back member 120 are formed. A connecting plate 150 may be arranged and fixed between the bent pieces 124 .
Also, one end and the other end of the connection plate 150 refer to a region including the one end and the other end of the connection plate 150 and do not mean only the tip of the connection plate 150 . Therefore, it also includes one end side and the other end side of the connecting plate 150 .

FIGS. 12(a) to (g) are schematic diagrams showing variations of the position where the connecting plate 150 is fixed to the fire door 100. FIG. The present invention includes embodiments in which connecting plates 150 are attached to fire door 100 at various points, as shown in FIGS. 12(a)-(g).

FIG. 12(a) 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 124 of the back material 120 on the door tip side of the fire door 100. A connection plate 150 is arranged and fixed across the gap.

FIG. 12(b) shows the upper folded piece 112 and the lower folded piece 114 of the surface material 110 and the upper folded piece 122 and the lower folded piece 122 of the back material 120 on the door tip side and the door trailing side of the fire door 100. FIG. A connection plate 150 is arranged and fixed between the curved pieces 124 . That is, connecting plates 150 may be arranged near four corners of the fire door 100 to connect the surface material 110 and the back material 120 with the connecting plates 150 .

Also, as shown in FIG. 12(c), only on the door tail side of the fire door 100, 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 122 of the back material 120 A connecting plate 150 may be arranged and fixed between the side bent pieces 124 .

Furthermore, as shown in FIGS. 12(d) and 12(e), a connecting plate 150 is arranged near the diagonal corners of the fire door, and the surface material 110 and the back material 120 are connected to the connecting plate 150. You may make it connect and fix.
Alternatively, as shown in FIG. 12(f), only the upper bent pieces 112 and 122 of the surface material 110 and the back material 120 may be connected by a connection plate 150, or as shown in FIG. 12(g). In this way, only the lower bent pieces 114 and 124 of the surface material 110 and the back material 120 may be connected by the connection plate 150 .

Furthermore, one or a plurality of connecting plates 150 are arranged at arbitrary locations other than those shown in FIGS. You may make it

Specifically, in a hinged door having an operation handle 170, when three hinge devices 160 are installed on the door tail side (FIG. 1), the connecting plate 150 is installed at two places on the top and bottom ends of the door. It is preferable that
This is because the surface material 110 and the back material 120 are fixed by the operation handle 170 at the operation handle 170 portion.

In addition, in the hinged door having the operation handle 170, when the hinge device 160 is installed at two places on the door tail side, the connection plate 150 is installed at two places, one at the top and bottom ends of the door tip side, and the other at the top and bottom ends of the door tail side. It is preferable that it is installed in one place in the central part. Further, the connecting plate 150 provided at the central portion of the upper and lower ends on the side of the door trailing edge may be replaced with a connecting member further provided with projections 210 . In this case, as shown in FIG. 11, the door frame 10 is provided with a recess 22 so that the projection 210 is fitted. Details will be described later.

Further, if the fire door 100 is not provided with the operation handle 170, it is preferable to provide the connection plate 150 also at the central portion of the upper and lower ends on the side of the door.
Furthermore, when the fire door 100 is a sliding door, since it does not have the operation handle 170, the connection plates are provided at three points, namely, the upper and lower ends and the central portion of the door tip side, and the upper and lower ends and the central portion of the door trailing side. It is preferable to provide at three places.

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 door trailing edge of the fire door 100 is rotatably attached to the door frame 10 by a hinge device 160 . In other words, the reinforcement frame 130 located on the door tail 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 this embodiment, the fire door 100 is connected to the door frame 10 by hinge devices 160 at three locations above and below, but it may be connected by two hinge devices 160 above and below, or by four or more hinge devices 160. You may

The hinge device 160 used in this embodiment is a so-called flag hinge. The hinge device 160 is configured with blade plates on both ends of the hinge shaft. The blade plate has a rectangular flat plate made of metal and is configured to be relatively rotatable around the axis of the hinge shaft.

One of the slats is attached to the prospective surface of the reinforcing frame 130 with the axis of the hinge shaft along the longitudinal direction of the reinforcing member 130, and the other slat is attached to the prospective surface of the vertical frame 14 of the door frame 10. ing.

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

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

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

In the fire door 100 according to the present invention, the upper folded piece 112 and the lower folded piece 114 of the surface material 110 and the upper folded piece 114 of the back surface material 120 are folded on the upper side and the lower side of the reinforcing member 130 on the door edge side of the fire door 100 . A connecting plate 150 connects the curved piece 122 and the lower bent piece 124 . With such a configuration, the reinforcing members 130, 130 on both sides of the fire door 100 can be connected by the upper bent pieces 112, 122 and the lower bent pieces 114, 124 and reinforced. Therefore, even if the surface material 110 side of the fire door 100 is heated by the heat of the fire in the event of a fire, it is possible to prevent the fire door from being warped and deformed.

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 and the back material 120 are connected via the connecting plate 150. Since they are maintained by the upper bent piece 122 and the lower bent piece 124, even when the fire door 100 receives heat such as fire, the surface material 110 and the back material 120 can be prevented from being warped or deformed by heat. can be done. Therefore, the fireproof performance can be improved even though the conventional U-shaped frame members are not fixed to the upper and lower ends of the fire door.

In addition, the first bent piece 116 of the surface material 110 and the first bent piece 126 of the back material 120 are butted against each other at the door tip side end and the door tail side end of the fire door 100 . Reinforced. Therefore, since it is not necessary to fix and reinforce the edge (or cover member) to the prospective surface of the door tip side end of the fire door 100, the design of the fire door can be enhanced.

In the above embodiment, the door trailing end of the fire door 100 is rotatably attached to the door frame 10 by the hinge device 160. However, the door trailing end of the fire door 100 is attached to the door frame. 12(b), the upper bent piece 112 of the surface member 110 and the upper bent piece 112 of the surface member 110 and A connecting plate 150 may be arranged and fixed between the lower bent piece 114 and the upper bent piece 122 and the lower bent piece 124 of the backing material 120 .

That is, connecting plates 150 may be arranged near four corners of the fire door 100 to connect the surface material 110 and the back material 120 with the connecting plates 150 . Furthermore, connecting plates 150 may be arranged at the central portions of the upper and lower ends of the fire door 100 in addition to the four corners to connect the surface member 110 and the back member 120 .

In this case as well, the corners of the surface material 110 and the back material 120 of the fire door 100 are reinforced by the connecting plate 150, so that a square frame-like frame for reinforcing the fire door 100 is formed as in the conventional case. The fire door 100 can be reinforced by the connection plate 150 without using a
It should be noted that a known opening/closing device such as a hinge may be used in place of the pivot hinge.

Furthermore, in the event of a fire, the surface temperature of one of the surface material 110 and the back material 120 of the fire door 100 becomes higher than the surface temperature of the other, resulting in thermal expansion. As a result, the conventional door warps and deforms greatly, creating a gap between the door frame and the door frame. Since the connecting plate 150 is connected and reinforced across the gap, it is possible to prevent the fire door 100 from significantly deforming due to bending of the connecting plate 150 when the surface material 110 or the back material 120 is thermally stretched. .

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

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

(Yet another embodiment)
As shown in FIGS. 10 and 11, a connecting member 200 formed with a fitting portion 210 (projection or recess) is fixed to the end face of the fire door 100 on the side of the door trailing edge, and the door is held at a position corresponding to the connecting member 200. A connector 20 having a fitted portion (recess or protrusion) that can be fitted to the fitting portion 210 (projection or recess) of the connection 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 surface material 110 and the back material 120 with screws or the like.
When the fire door 100 is opened or closed, the fitted portion 22 of the connector 20 fixed to the door frame 10 does not come into contact with the fitting portion 210 of the connecting member 200 fixed to the fire door 100. It is Further, when the fire door 100 is thermally elongated due to thermal deformation or the like and warped and moves, the fitting portion 210 of the connecting member 200 fixed to the fire door 100 is not fitted with the connector 20 fixed to the door frame 10 . It is configured to abut on the joining portion 22 . Incidentally, reference numeral 220 in the drawing denotes a screw hole.

Therefore, the surface material 110 and the back material 120 of the fire door 100 are connected by the connecting member 200, and the strength is improved. It is possible to suppress the occurrence of a gap between

(Yet another embodiment)
In conventional doors, an electric lock may be provided. When an electric lock is provided, a relay device for connecting wiring for the electric lock is provided on the upper portion of the door on the trailing edge side. The relay device is placed between the surface material 110 and the back material 120 and adhered to the surface material 110 and the back material 120 with an adhesive.
However, in the event of a fire, the adhesive around the relay device melts, causing a problem that the surface material 110 and the back surface material 120 around the relay device are separated.

In this embodiment, the connecting plate 150 is configured to fix the surface material 110 and the back material 120 at the upper end and the lower end of the relay device. With such a configuration, the relay device can be reliably fixed inside the fire door 100 even if the adhesive for bonding the relay device to the surface member 110 and the back member 120 melts in the event of a fire. can do.
Alternatively, the connection plate 150 may be screwed to the relay device via the surface member 110 and the back member 120 .
(Still another embodiment)

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

A preferred embodiment of the invention has been described above, but the invention is not limited to only the embodiments shown above. It is understood that various other embodiments can be made without departing from the spirit and scope of the invention. Furthermore, in this embodiment, the actions and effects of the configuration of the present invention are described, but these actions and effects are 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 connecting plate 160 hinge device

Claims (2)

A fire door openably attached to a door frame,
a facing material with folded ends;
a backing material having an end portion bent and arranged to face the fronting material;
a core material filled between the surface material and the back surface material;
including
At the top and/or bottom end of the fire door,
One end of the connecting plate is fixed to the upper bent piece of the surface 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 upper bent piece of the back surface material. The connecting plate is fixed to the lower bent piece of the material and the other end of the connecting plate is fixed to the lower bent piece of the back surface material ,
First bent pieces that are bent in opposing directions are formed at both side ends of the front surface material and the back surface material, and first bent pieces that are bent inward are formed at the leading ends of the first bent pieces. 2 folded pieces are formed,
A fire door, wherein a second bent piece of the face material and a second bent piece of the back material are in contact with each other. 2. The fire door of claim 1, further comprising stiffeners disposed between said facing and said backing and on the leading and trailing sides of the door.

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