JP2005232860A - Door frame for fire door and fire door using this door frame - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door frame for a fire door easy in manufacture-construction in a lightweight type, and capable of attaining required fireproof performance; and the lightweight fire door superior in fireproof performance by using this door frame. <P>SOLUTION: This door frame 10 openably-closably supports a fire door 20, and forms a shape of surrounding the outer periphery of the fire door 20. This door frame has an inside space having a cross section of a closed cross-sectional shape. A fire resistant sheet 12 composed of a thin plate-like thermally expansive fire resistant material is inserted into this inside space. The fire resistant sheet is desirably inserted in close contact into a front face part 11a and a rear surface part 11e of an outer shell part 11. Any one or a plurality of resin foaming bodies 17 may be inserted in combination into the inside space as an inorganic material 15, a woody material 16 and a foaming material together with the fire resistant sheet. The fire door 1 is composed of the door frame 10 and the fire door 20. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a door frame for a fire door that is installed in an opening of a fire prevention compartment or the like, and a fire door using the same, and in particular, it can improve fire resistance and reduce the weight and facilitate construction. The present invention relates to a door frame for a door and a fire door using the door frame.

  Conventionally, as a door frame for this type of fire door, there is a type in which rock wool 51 is packed inside an iron door frame 50 as shown in FIG. Further, as shown in FIG. 7b, there is a type in which a mortar 52 is filled in the door frame 50A. Furthermore, as shown in FIG. 7c, there is a type in which a calcium plate 53 is stacked and inserted inside the door frame 50B. Each door frame supports the fire door 55 so as to be openable and closable, and a calcium plate 56 is laminated and inserted into the fire door 55 of FIG. 7c. Each door frame uses a metal mold material obtained by molding a metal plate material.

In addition, the conventional fire door uses an inorganic fireproof material for the core of the door and door frame, attaches a decorative material made of aluminum to the front door, and attaches a heat sensitive foam material to the gap between the front door and the door frame. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 6-10568 ([0004])

  By the way, when the rock wool 51 is loaded into the interior space of the door frame 50 made of a molded metal mold like the door frame 50 shown in FIG. 7a, the door frame 50A shown in FIG. Compared to the door frame in which the mortar 52 and the calcium plate 53 are loaded in the internal space like the door frame 50B, the weight can be reduced. However, since rock wool is a glass fiber material, it is preferable for the health of the manufacturer. Absent.

  Moreover, although the door frame 50A shown in FIG. 7b has filled the inside of the shape | molded metal mold material with the mortar 52 and achieved predetermined fireproof performance, it needs to provide the curing period until the mortar hardens | cures. In addition, a storage place during curing is also required, and the manufacturing method becomes complicated. Furthermore, since the door frame 50A or the door frame 50B is loaded in the entire internal space of the molded metal mold material such as mortar and calcium plate, the door frame becomes heavy, and when the door frame is attached to the wall surface of the building However, there is a problem that it becomes difficult to handle.

  The door frame 50, 50A, 50B shown in FIGS. 7a, 7b, and 7c must be filled with a fireproof material in the interior space of the mold after the metal mold is formed. The process including this becomes complicated. In addition, since any door frame is filled with a fireproof material in the internal space of the metal mold material, it has excellent heat insulation and the temperature rise on the non-heated surface is extremely small compared to the heated surface. However, since the temperature difference between the heated surface and the non-heated surface is large, there is a problem that the door frame is deformed due to a large warp to the heated surface side due to the difference in linear expansion between the heated surface and the non-heated surface of the metal mold.

  Furthermore, since the fire door described in Patent Document 1 is filled with an inorganic fireproof material as a core material inside the door and door frame, similarly to the door frames 50, 50A, 50B shown in FIG. When the door frame is attached to the wall surface of the building, the handling becomes difficult, and the handling becomes difficult when the door is attached to the door frame.

The present invention has been made in view of such problems, and its object is to
The object of the present invention is to provide a door frame for a fire door that is lightweight and easy to manufacture and implement and can achieve the required fire prevention performance. Another object of the present invention is to provide a fire door that uses the door frame and is excellent in fire prevention performance, lightweight and easy to construct. In other words, a heat-expandable fire-resistant material, and a heat-expandable fire-resistant material and any one of inorganic materials, wood-based materials, and foamed materials, or a combination of two or more, are inserted into the interior space of the door frame and manufactured at a light weight. An object of the present invention is to provide a door frame that can provide a predetermined fire prevention performance with a simple method.

  In order to achieve the above object, a door frame for a fire door according to the present invention is a door frame that supports the fire door so that it can be opened and closed, and surrounds the outer periphery of the fire door, and this door frame has its internal space. A thin plate-like thermally expandable refractory material that is thermally expanded by heating during a fire or the like is inserted therein. The door frame is made of iron or steel and has a strength capable of supporting the fire door. The interior surrounded by the outer shell is a space, and a thin plate-like thermally expanded refractory material is inserted into the interior space. The outer shell of the iron plate constituting the door frame preferably has a closed cross-section in terms of strength.

  As a metal which comprises a door frame, what shape | molded metals, such as stainless steel, a zinc plating steel plate, an aluminum zinc alloy plating steel plate, aluminum other than the thing made from iron and steel, for example is mentioned. As the thickness of the metal that constitutes the door frame, for example, in the specific fire prevention equipment defined by the Building Standard Law, it is defined as 1.5 mm or more with an iron plate, but it is a thermally expandable fire resistant material, a thermally expandable fire resistant material and an inorganic material. In the present invention in which a combination of a wood material and a foam material is inserted into the inner space of the mold material, the thickness of the metal constituting the mold material can be reduced.

  The door frame for a fire door according to the present invention configured as described above has a thermally expandable refractory material inserted into the internal space, and the thermally expandable refractory material is a thin plate with a gap formed in the internal space. Therefore, the weight reduction of the door frame can be achieved. In addition, it is lightweight and is easy to construct and manufacture. When this door frame is heated by a fire or the like, the heat-expandable refractory material inserted into the internal space expands and fills the internal space with a refractory heat insulating material to prevent warp deformation due to heating of the door frame. In addition, it is possible to prevent the flame from entering with the fire door supported by the door frame.

  Moreover, as a preferable specific aspect of the door frame for a fire door according to the present invention, the thermally expandable refractory material is inserted in close contact with an inner peripheral wall surface of the door frame. It is preferable to insert a thin plate-like thermally expandable refractory material through a saddle material or other support member. In particular, it is preferable that a thermally expandable refractory material is adhered to the inner peripheral wall surfaces of the front and rear surfaces of the door frame using a brazing material or the like. You may make it adhere | attach using an adhesive agent or an adhesive. According to this configuration, the thin plate-like thermally expandable refractory material can be brought into contact with the inner wall surface of the door frame via the saddle material or other support member, and can be quickly expanded at a high temperature such as a fire to open the door. Deformation such as warping of the frame can be reliably prevented, and the fireproof performance of the door frame and fire door can be stabilized.

  Furthermore, as a preferable specific other aspect of the door frame for a fire door according to the present invention, the above-described door frame includes an inorganic material, a wood-based material, a thermally expandable refractory material, Any one or a combination of a plurality of foam materials is inserted. The plurality of materials may be stacked and combined, and the stacked materials may be inserted. According to this structure, in the interior space of the door frame, any one of inorganic materials, wood-based materials, foam materials, or a combination of a plurality of materials are inserted, and the thermally expandable refractory material is stabilized by these. Therefore, the weight can be reduced, and deformation such as warping of the door frame can be reliably prevented.

The wood-based material inserted into the interior space of the door frame is preferably a material having a specific gravity of 0.3 kg / m ³ or more. These materials include solid wood such as hinoki, pine, tsuga, tamo, maple, oak, niyato, makore, moabi, zelkova, beech, lawan, teak, atopin, oak, makanba, maple, and bubinga. Further, a laminated material such as LVL, or a combination of this laminated material and the above-mentioned solid material may be used. By combining these materials, warpage is less likely to occur, and therefore it is preferably used.

  The foam material inserted into the interior space of the door frame is not particularly limited. For example, phenol foam, urethane foam, polyethylene foam, polypropylene foam, polystyrene foam, and the like, and inorganic powder such as aluminum hydroxide in these foam materials. You may use what was filled. Furthermore, an inorganic foam material etc. are mentioned.

  Inorganic materials inserted into the interior space of the door frame include gypsum board, calcium silicate board, fiber reinforced gypsum board, lightweight cellular concrete (ALC) board, extruded cement board, PC board, molded mortar, iron, Examples thereof include metals such as steel, stainless steel, galvanized steel sheet, aluminum zinc alloy plated steel sheet, and aluminum.

  Inorganic materials, wood-based materials, and foamed materials may be inserted into a part of the gap inside the door frame without being loaded inside the door frame in order to reduce the weight of the door frame. In addition, the inorganic material such as a calcite board cannot exhibit the fire performance of the door frame unless a specific high specific gravity is loaded in the door frame, but by inserting the thermally expansive refractory material into the door frame at the same time Even if one with a low specific gravity is used, the fire performance of the door frame can be exhibited and the weight can be reduced.

  The heat-expandable refractory material is not particularly limited, but 15 to 300 parts by weight of a phosphorus compound and a heat-expandable inorganic substance and 30 to 500 parts of an inorganic filler with respect to 100 parts by weight of a resin component mainly composed of butyl rubber. It is preferable that it is a molded body made of a resin composition containing parts by weight and containing 200 to 600 parts by weight of the total amount of the thermally expandable inorganic substance and the inorganic filler. Further, the heat-expandable refractory material contains 10 to 300 parts by weight of a heat-expandable inorganic substance and 30 to 400 parts by weight of an inorganic filler with respect to 100 parts by weight of the epoxy resin. It is preferable that it is a molded object which consists of a resin composition which the total amount of an agent contains 40-500 weight part. When the heat-expandable refractory is configured in this way, when high heat is generated in a fire or the like, the heat-expandable refractory in the door frame rapidly expands, and a stable heat-resistant insulation layer against the occurrence of a fire is formed. It is possible to prevent deformation such as warping of the door frame.

  The fire door according to the present invention is characterized in that the fire door is supported to be openable and closable by any one of the door frames described above. It is preferable that the fire door supported by the door frame is inserted with a heat-expandable fireproof material. The fire door constructed in this way will not be deformed when the door frame and the fire door supported by the door frame are both heated by a fire, etc. Therefore, the function as a fire door can be ensured.

  According to the present invention, it is possible to reduce deformation such as warping when a door frame for a fire door or a fire door that supports the fire door on the door frame is heated in a fire, etc. Prevent fire and stabilize fire performance. Moreover, since a door frame and a fire door can be made lightweight, manufacture becomes easy and construction can be made easy.

  Hereinafter, a door frame for a fire door according to the present invention and an embodiment of a fire door using the same will be described in detail with reference to the drawings. FIG. 1 is a front view of a fire door according to the present embodiment, and a cross-sectional view taken along the line AA. FIG. 2 is an enlarged cross-sectional view of a B part which is a main part of FIG. 1 and 2, the fire door 1 is provided at the opening of the fire prevention compartment wall 2 and divides the compartment 3 and the compartment 4.

The fire door 1 is composed of a door frame 10 and a fire door 20 supported by the door frame through a hinge mechanism or a hinge 5 so as to be opened and closed. The door frame 10 has a shape surrounding the outer periphery of the fire door 20. doing. The door frame 10 and the fire door 20 are formed of an iron plate having a predetermined thickness. In the case of specific fire prevention equipment, for example, the thickness of the iron plate is 1.5 mm or more, and in the case of fire prevention equipment, 0.8 mm to 1.5 mm. An iron plate having a thickness less than that is used, and the iron plate has a closed cross-sectional shape. That is, the door frame 10 is processed by sheet metal, and the end portions thereof are joined by welding or the like.

  The door frame 10 is formed by bending an iron plate having a predetermined thickness as described above to form an outer shell portion 11 of a metal mold material, and a peripheral frame portion 11A located on the outer periphery of the fire door, and extending inward from the peripheral frame portion. And an abutting frame portion 11B to be taken out. When viewed from the front, the peripheral frame portion 11A has a dimension that forms a clearance of several millimeters from the outer periphery of the fire door 20, and the abutting frame portion 11B extends inward by about 10 to 20 mm from the inner periphery of the peripheral frame portion. The fire door 20 comes into contact with it and prevents further swinging. In this embodiment, the door frame 10 has a closed cross-sectional shape, a closed space is formed inside, and a space is formed inside the outer shell portion 11 formed of an iron plate.

  The cross-sectional shape of the door frame 10 will be described in detail. The front surface portion 11a located on the opening side of the fire door 20, that is, the front surface facing the section 3, and the depth portion 11b extending rearward at a right angle from the front surface portion, An abutting portion 11c extending from the depth portion toward the inside of the opening, an edge portion 11d extending rearward from the abutting portion at a right angle, and extending from the edge at a right angle toward the outside of the opening A closed cross section is configured by including a rear surface portion 11e facing the compartment 4 and an outer surface portion 11f connecting the rear surface portion and the front surface portion, and an internal space is formed.

  A fireproof sheet 12 in which a thermally expandable fireproof material is formed in a thin plate shape is inserted into this internal space. The fireproof sheet 12 is inserted into the internal space in a state of being in close contact with the inner surfaces of the front surface portion 11a and the rear surface portion 11e. That is, the inner surface of the outer shell 11 is in close contact with the inner surface of the front surface portion 11a and the inner surface of the rear surface portion 11e, for example, via an adhesive or an adhesive. Although not shown, a resin plate material, a metal plate material, a saddle material, or the like may be inserted into the inner space of the outer shell portion to support the fireproof sheet.

  The thickness of the refractory sheet 12 formed from the thermally expanded refractory material is set by the expansion rate and the volume of the interior space of the door frame 10. Basically, the refractory sheet 12 expands during heating to form an outer shell. The thickness is set so that the internal space of the portion 11 is filled with the expansion heat insulating material. In the embodiment of FIG. 2, two thermally expandable fireproof sheets having a thickness of about 1 mm are inserted. When a fire occurs, the front surface portion 11a or the rear surface portion 11e of the door frame 10 directly receives heat, so that the heat-expandable fireproof sheet 12 is brought into close contact with the inner surface of this portion, so that the fireproof sheet 12 can be quickly expanded. Ten deformations can be prevented.

  In the case of this door frame 10, the metal plate is formed in advance by bending the iron plate as described above, and instead of inserting the fireproof sheet 12 into the internal space, the fireproofing is performed at the stage before making the metal mold. You can install the sheet. That is, a metal plate is formed by forming an outer shell portion 11 so as to cover the refractory sheet by bending an iron plate with refractory sheets 12 and 12 attached to portions corresponding to the front and rear surfaces of the metal mold. The door frame 10 can be formed of a mold material. In this way, it is not necessary to use a metal mold material in advance, and the fireproof sheet can be attached at the stage of the flat plate before the metal mold material is formed, and the door frame 10 can be easily manufactured.

  A fire door 20 that is supported by the door frame 10 so as to be openable and closable is composed of a rectangular outer peripheral frame 21 in which four sides of an upper side, a lower side, a left side, and a right side are connected by a metal saddle, and the front of the outer peripheral frame. Iron plates 22 and 22 located in the back are provided. For fixing the outer peripheral frame body 21 and the iron plate 22 made of the brazing material, an appropriate method such as screwing, riveting, or fixing using an adhesive can be used. In the present embodiment, the iron plate 22 is bent at a right angle so as to extend to the side surface of the outer peripheral frame body 21 made of a saddle material. The bent portions of the front and rear iron plates may be joined by welding or the like, or may be configured to be covered with other U-shaped members not shown.

  As described above, the fire door 1 supports the fire door 20 on the door frame 10 via the hinge mechanism or the hinge 5 and can be opened and closed in the direction of the section 3. However, the fire door 1 is not limited to the rotary type, but is a sliding door type. Or double doors. When the fire door and the door frame are in contact with each other, a gap is formed, but this part is not shown in the figure, but when the fire door 20 is closed using a door stop such as a packing material for fire protection, It is set as the structure which a gap does not produce.

Next, another aspect of the door frame will be described.
In the internal space of the door frame 10A shown in FIG. 3, as an inorganic material, a filler in which a calcium silicate plate (hereinafter referred to as a calcium plate) 15 and a fireproof sheet 12A formed from a thermally expanded fireproof material are stacked is inserted. ing. That is, the cage member 14 having a rectangular cross section is inserted into the internal space, and the fireproof sheet 12A and the calcium plate 15 are disposed in close contact with each other in the gap between the cage member and the door frame. Thus, there is nothing in the interior of the casing 14, and the outer surface of the casing and the inner surface of the door frame 10A are held with the fireproof sheet 12A and the calcium carbonate plate 15 sandwiched therebetween, thereby achieving the weight reduction of the door frame 10A. . In the embodiment of FIG. 3, fire-resistant sheets 12 </ b> A and 12 </ b> A made of a thermally expandable fire-resistant material having a thickness of about 0.5 mm are inserted outside the calcium plates 15 and 15 having a thickness of about 5 to 15 mm.

  In the case of this door frame 10A, as described above, the outer shell portion 11 is bent in advance from an iron plate, and the fireproof sheets 12A and 12A and the calcareous plate 15 are inserted into the inner space together with the brazing material 14 to make the fireproof sheet incombustible. Since it is laminated with the material, the calcite plate, the thickness of the fireproof sheet can be reduced. The fireproof sheet can be fixed by screwing, riveting, or the like, or can be fixed with an adhesive, an adhesive, or the like, and the fireproof sheet may be laminated in advance. When the fireproof sheet is used in combination with a calcium plate, a woody material, or a foam material, it can be inserted in a state of being fixed to the composite. Similar to the door frame 10, the door frame 10 </ b> A can be easily manufactured and configured to be lighter than a type in which the interior space of the door frame is filled with rock wool or mortar.

  In the internal space of the door frame 10 </ b> B shown in FIG. 4, a wooden bar 16 that fits inside the door frame is inserted as a wooden material. The wooden bar does not adhere to the front surface portion 11a and the rear surface portion 11e of the door frame 10B, and has a slight gap. The fireproof sheets 12 and 12 are inserted into the gap portion, and the internal space is made of wood. Filled with bar material 16 and fireproof sheet 12. In this way, the fireproof sheet is inserted into the front surface portion 11a and the rear surface portion 11e of the door frame 10B in close contact with the inner surface. In addition, as shown in the drawing, the wooden bar may not be located in the abutting portion of the door frame and may have a rectangular cross section. This door frame 10B can also be manufactured easily and lightweight as compared with the type in which the interior space of the door frame is filled with rock wool or mortar, similarly to the door frames 10 and 10A.

  In the interior space of the door frame 10C shown in FIG. 5, a filler in which a resin foam 17 and fire-resistant sheets 12 and 12 of thermal expansion refractory material are laminated as a foam material is inserted. A foam material is formed in accordance with the width of the interior space of the door frame, fireproof sheets are attached to the front and rear surfaces of the foam material, and inserted into the interior space of the door frame 10C. The outer shell portion 11 of the door frame is formed in advance, and the fireproof sheets 12 and 12 are inserted into the inner space so as to be in close contact with the front surface portion 11a and the rear surface portion 11e, and then the resin is injected and foamed. it can. The door frame 10C can be made lighter than the door frame 10 and can be easily manufactured and installed.

  The door frame for the fire door of the present embodiment configured as described above and the operation of the fire door will be described below. The door frame of this embodiment is installed in the opening of a fire prevention division wall. For example, when the fire prevention partition wall 2 is an ALC plate, an iron angle fixed along the opening and a door frame are welded through a reinforcing bar, and mortar is injected and fixed in a gap portion. In the case where the fire prevention partition wall is in another form, such as a concrete wall or another wall, an appropriate fixing method is applied. The fire door 20 is supported to the door frame 10 and the like fixed in this manner so as to be opened and closed through a hinge mechanism, a hinge 5 and the like.

  When a fire occurs in one of the spaces 3 and 4 divided by the fire prevention compartment, the fire door 1 prevents the flame from entering the other space. That is, when the door frame 10 or the like is heated by the high heat of the fire, the fire-resistant sheet 12 of a thermally expandable refractory material inserted in the internal space expands, and fills the internal space to form a fire-resistant and heat-insulating layer. This fireproof heat insulating layer expands, for example, about 2 to 50 times, and prevents deformation of the door frame, so that no warpage or the like occurs. When the outer shell portion 11 of the door frame has a closed cross section, the open portion of the cross section does not expand when the fireproof sheet 12 is thermally expanded, and the door frame 10 is deformed and the fire prevention partition wall 2 of the door frame Is prevented from peeling off.

  Thus, since the deformation | transformation of the door frame 10 grade | etc., Is prevented, the approach of the flame from one division where the fire broke out to the other division is prevented reliably. A gap between the door frame 10 or the like and the fire door 20 is sealed with a door stop or a fire-proof packing to prevent a flame from entering. Although not shown, when a thin fireproof sheet formed from a thermally expandable fireproof material is also inserted into the internal space of the fireproof door 20 supported by the door frame, the fireproof sheet expands in the event of a fire, and the fireproof door 20 Is prevented from being deformed and crushed, the door frame 10 and the fire door 20 supported on the inside thereof are prevented from being deformed, and the gap between the two is kept constant, so that the fire performance is further improved.

  When the fireproof sheet 12 is in close contact with the inner wall surface of the door frame 10 or the like, heat is transferred directly from the iron door frame by heat conduction, so that it rapidly expands from the occurrence of a fire, and the front side of the inner space or Since it thermally expands from the rear side toward the inside, no gap is generated in the vicinity of the inner wall of the door frame, and deformation of the door frame can be reliably prevented. In addition, even if the firewood, wood-based material, and foamed material located in the interior space of the door frame are destroyed by heating, the heat-expandable refractory material expands so as to cover it from the outside, preventing deformation of the door frame 10 and the like. Is done.

  40 parts by weight of epoxy resin (“E807” manufactured by Japan Epoxy Resin), 60 parts by weight of curing agent (“FL052” manufactured by Japan Epoxy Resin), 100 parts by weight of ammonium polyphosphate (“Exolit AP422” manufactured by Clariant), thermal expansibility A resin composition was obtained by kneading 100 parts by weight of graphite (“GREP-EG” manufactured by Tosoh Corporation) and 100 parts by weight of calcium carbonate (“BF300” manufactured by Bihoku Flour Industry Co., Ltd.) using a kneading roll. The obtained resin composition was formed into a sheet while laminating a polyethylene laminated polyester non-woven fabric on one side with a roll coater, and then cured in a heating furnace to obtain a 1 mm thick sheet (fireproof sheet 12). Thereafter, an adhesive layer is applied to the fireproof sheet 12 and cut to a width of 40 mm, and formed from a 1.6 mm thick iron plate. It was inserted into the interior space of the door frame 10 and adhered to the front surface portion 11a and the rear surface portion 11e via an adhesive layer.The fire door 20 using a 1.6 mm thick iron plate was supported on the door frame 10, A steel fire door as shown in FIG. 2 was produced.

  42 parts by weight of butyl rubber (“Butyl rubber 065” manufactured by Exxon Mobil Chemical Co., Ltd.), 50 parts by weight of polybutene (“Polybutene 100R” manufactured by Idemitsu Petrochemical Co., Ltd.), 8 parts by weight of hydrogenated petroleum resin (“Escollets 5320” manufactured by Tonex) Contains 120 parts by weight of expandable graphite (“GREP-EG” manufactured by Tosoh Corporation), 30 parts by weight of aluminum hydroxide (“B325” manufactured by ALCOA), and 150 parts by weight of calcium carbonate (“BF300” manufactured by Bihoku Flour Industry Co., Ltd.) The resin composition to be kneaded was kneaded using a kneading roll to obtain a resin composition. Thereafter, this resin composition was formed into a thickness of 2 mm by pressing, and was cut into a width of 40 mm with a ring cutter according to the width of the cavity to obtain a tape-shaped molded body (fireproof sheet 12). The tape-shaped molded body was affixed to an iron plate before molding using the self-adhesiveness of the resin composition. A door frame was produced by bending an iron plate to which a tape-shaped molded body was attached. A fire door 20 using a 1.6 mm thick iron plate was supported on the door frame 10 to produce a steel fire door as shown in FIG.

  40 parts by weight of epoxy resin (“E807” manufactured by Japan Epoxy Resin), 60 parts by weight of curing agent (“FL052” manufactured by Japan Epoxy Resin), 100 parts by weight of ammonium polyphosphate (“Exolit AP422” manufactured by Clariant), thermal expansibility A resin composition was obtained by kneading 100 parts by weight of graphite (“GREP-EG” manufactured by Tosoh Corporation) and 100 parts by weight of calcium carbonate (“BF300” manufactured by Bihoku Flour Industry Co., Ltd.) using a kneading roll. The obtained resin composition was formed into a sheet shape while laminating a polyethylene laminated polyester nonwoven fabric on one side with a roll coater, and then cured in a heating furnace to obtain a sheet-like formed body (fireproof sheet 12A) having a thickness of 1 mm. Thereafter, the fireproof sheet 12A is cut into a width of 40 mm, and fixed to a 6 mm-thick calcium plate 15 with a tacker. The fireproof sheet was inserted into the interior space of the door frame 10A formed from a 0.8 mm thick iron plate in a state of being in close contact with the front surface portion 11a and the rear surface portion 11e. A fire door 20 using a 1.6 mm-thick iron plate was supported on the frame 10A to produce a steel fire door as shown in FIG.

Comparative Example As shown in FIG. 7c, a laminate of 12.5 mm thick calcium silicate plates was used as a door frame and door core material, and a steel fire door using a 1.6 mm thick iron plate was produced. did.

A steel fire door with a width of 1 m and a height of 2 m was prepared and subjected to a fire resistance test for 1 hour in accordance with the heating conditions of ISO 834. The steel fire doors of Examples 1, 2, and 3 took 10 seconds to the non-heating side. No flame continuation was observed, no flames continued on the non-heated surface for more than 10 seconds, damage such as cracks through which the flame passed, and generation of gaps.
On the other hand, the steel fire door of the comparative example warped greatly to the heating side at 57 minutes from the start of the test, and the flame passed and a gap was generated.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed. For example, although the metal plate material such as an iron plate constituting the door frame has an example having a closed cross-sectional shape, it is needless to say that an open cross-sectional shape as shown in FIG. 6 may be used.

  The door frame 10D of FIG. 6 includes an outer shell portion 11A that is open on the side to be attached to the fire prevention compartment wall, and a saddle member 13A that is similarly opened is inserted into the inner space of the outer shell portion. The fireproof sheet 12 is positioned in the gap between the outer shell and the outer shell. In the case of a door frame having such an open cross-sectional shape, when it is fixed to a fire prevention partition wall or the like, mortar or the like can enter the inside of the door frame, and the fire resistance together with the thermally expandable fireproof sheet inserted inside Can be improved. In addition, as an example of inserting the fireproof sheet into the interior space of the door frame, an example in which the fireproof sheet is inserted in close contact with the front and rear surfaces has been shown. However, the fireproof sheet may be inserted along other surfaces.

  Examples of calcium carbonate and aluminum hydroxide have been shown as inorganic fillers, but are not limited thereto, for example, alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, ferrite Various inorganic fillers such as metal oxides such as calcium hydroxide, hydrous minerals such as calcium hydroxide, magnesium hydroxide, aluminum hydroxide, hydrotalcite, metal carbonates such as barium carbonate, calcium salts such as calcium silicate, etc. Can be used.

The said inorganic filler may be used independently or may use 2 or more types together. Among the above inorganic fillers, the combined use of a hydrous inorganic substance and a metal carbonate is particularly preferable. The hydrous inorganic substance and the metal carbonate are considered to contribute to the improvement of the strength of the combustion residue and the increase of the heat capacity because they function as aggregates. As a particle size of the said inorganic filler, 0.5-100 micrometers is preferable, More preferably, it is 1-50 micrometers. The inorganic filler is more preferably used in combination of a large particle size and a small particle size.

1 shows an embodiment of a fire door according to the present invention, (a) is a front view, and (b) is a cross-sectional view along the line AA. The B section expanded sectional view of Drawing 1b. The principal part sectional drawing of the other aspect of FIG. The principal part sectional drawing of the further another aspect of FIG. The principal part sectional drawing of another aspect of FIG. Sectional drawing which shows the other aspect of a door frame. Sectional drawing which shows the principal part which shows the relationship between the door frame of the conventional fire door, and a fire door.

Explanation of symbols

  1: Fire door, 10, 10A, 10B, 10C, 10D: Door frame, 11, 11A: Outer shell (metal mold material), 12, 12A: Fireproof sheet (thermally expandable fireproof material), 13A, 14: Firewood Material: 15: Calcium silicate plate (inorganic material), 16: Wood rod (wood material), 17: Resin foam (foam material), 20: Fire door, 21: Outer frame, 22: Iron plate

Claims (6)

  A door frame that supports the fire door in an openable and closable manner and surrounds the outer periphery of the fire door, wherein the door frame has a thin plate-like thermally expandable refractory material inserted into its internal space. A door frame for fire doors.   The door frame for a fire door according to claim 1, wherein the thermally expandable refractory material is inserted in close contact with an inner peripheral wall surface of the door frame.   The door frame is inserted into the internal space together with the thermally expandable refractory material, any one of inorganic materials, wood materials, and foam materials, or a combination thereof. Item 3. A door frame for a fire door according to item 1 or 2.   The heat-expandable refractory material contains 15 to 300 parts by weight of a phosphorus compound and a heat-expandable inorganic substance and 30 to 500 parts by weight of an inorganic filler with respect to 100 parts by weight of a resin component mainly composed of butyl rubber. The door frame for a fire door according to any one of claims 1 to 3, wherein the door frame is a molded body made of a resin composition containing 200 to 600 parts by weight of a total amount of a thermally expandable inorganic substance and an inorganic filler.   The thermally expandable refractory material contains 10 to 300 parts by weight of a thermally expandable inorganic material and 30 to 400 parts by weight of an inorganic filler with respect to 100 parts by weight of an epoxy resin. The door frame for a fire door according to any one of claims 1 to 3, wherein the door frame is a molded body made of a resin composition containing a total amount of 40 to 500 parts by weight.   A fire door, wherein the fire door is supported on the door frame according to any one of claims 1 to 5 so as to be openable and closable.

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