KR101900052B1 - Insulation Device Using Fire Door - Google Patents

Abstract

The present invention relates to an insulation device using a fire door, for preventing the fire door from being deformed by shielding heat due to fire, and having improved performance of crime prevention, insulation, soundproofing, windshield, and condensation prevention. The fire door according to the present invention includes: a main fire door formed at an inner periphery thereof with a plurality of heat insulation holes in the shape of a long groove at a predetermined interval; an inner heat insulator disposed inside the main fire door; a heat insulating material filled inside the main fire door and around the inner heat insulator; a non-combustible inner heat insulation packing disposed between an outer periphery of the inner heat insulator and an inner periphery of the main fire door; an auxiliary fire door including a flat plate, a bent plate, and a support pipe for separating the flat plate from the bent plate at a predetermined distance, a finishing plate coupled to a fastener coupling groove of the bent plate, a heat insulation material filled between the flat plate and the bent plate, and an insulating groove formed between an outer edge of the flat plate and an inner edge of the bent plate; a space holding unit disposed between the main fire door and the auxiliary fire door; a heat insulating space formed by the space holding unit; a fastener fastened in the direction of the main fire door from a front of the bent plate of the space holding unit to couple/fix the auxiliary fire door to the main fire door; a door frame surrounding the peripheries of the main fire door and the auxiliary fire door and having a plurality of heat insulating holes; and a door frame packing.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to an insulation device using a fire door which is capable of preventing deformation of a fire door by heating heat due to a fire, and is excellent in performance such as crime prevention, heat insulation, soundproofing, wind protection and dew condensation prevention.

Hereinafter, the term "fire" as used in the present invention refers to minimizing heat conduction, preventing flame migration, blocking toxic gases, and preventing deformation of fire doors.

Generally, a metal fire door has a reinforcing frame around the inner surface of a front plate, and a honeycomb-shaped intermediate member (usually a honeycomb) having an adhesive applied on the front and rear surfaces of the front plate corresponding to the inside of the reinforcing frame And then the front and rear plates and the intermediate member are mutually fixed by adhesion. After that, the engaging piece formed around the edge of the front plate is engaged with the engaging piece formed on the rim of the rear plate And is completed by bending.

The use of such fire doors as doors of houses, apartments, offices and the like as fire doors can prevent damage to lives and property by preventing the spreading and spreading of high temperature flames and toxic gases (hereinafter referred to as "flames") In order to achieve the above object, the front or rear face of the fire door must be free from deformation such as warping even if it is exposed to a high temperature fire for a long time.

As a prior art for solving such a problem, Korean Patent Registration No. 0966241, Utility Model Registration No. 0363578, Publication No. 2005-0116339 (hereinafter collectively referred to as "Prior Art 1") proposed by the present applicant and inventors, Patent Registration No. 0982752 (hereinafter referred to as "Prior Art 2").

In the above prior art 1, a separate incombustible hermetically sealed member is placed between the door and the door frame, or when the door is opened, the connection between the door frame and the door is strengthened, so that even when the door is deformed, the movement / spread of the flame is prevented.

However, in the prior art 1, when the fire door is exposed to a high temperature for a long time and the heat conduction is continuously performed, or when a side is melted or melted, the function is lost. Therefore, It was not enough for the plan.

Next, Prior Art 2 discloses a clay mineral composed of aluminum hydroxide, magnesium hydroxide, and iron hydroxide in the core of the intermediate material disposed between the front and rear panels of the fire door, and a vermiculite powder or a pyroxene powder widely used as a heat- It is a building material made of lightweight concrete fine aggregate, asbestos, cement, etc. It is filled with pearlite powder filling material which has effects of refractory fire, insulation, sound absorption, etc., Heat insulation, soundproofing, and fire resistance.

However, in the prior art 2, vermiculite or pearlite has heat resistance, but the heat conduction blocking effect is extremely small, so that it is impossible to overcome the fire migration / spread due to the deformation and the deformation of the fire door due to heat conduction in the case of fire. Therefore, although the effect of insulation can be exhibited in Prior Art 2, the problem caused by heat conduction can not be solved.

On the other hand, since the prior arts 1 and 2 include the intermediate material of the paper material, not only the heat conduction action is maximized due to the combustion of the intermediate material in the fire but also the front and rear plates of the fire door are close to the separation or separation Resulting in deformation. Particularly in the case of Prior Art 2, when the intermediate material is burnt, the solidified filler filled in the core of the intermediate material is separated into several hexagonal columnar shapes (core shapes), and a free flow is possible after the separation. Free flow, etc.) contributed to the deformation of the fire door.

Korean Utility Model Publication No. 20-2010-0004605 Korean Registered Utility Model No. 20-0369797

The problem to be solved by the present invention is to solve the problem in conventional fire doors including the prior arts 1 and 2. It is an object of the present invention to prevent the fire door from changing shape due to high heat by heating the fire due to fire in case of fire, And the like.

The present invention also provides a fireproof door which is capable of preventing heat conduction between the front and rear sides of the fire door, thereby improving the heat insulation, soundproofing, wind protection and dew condensation preventing performance, and the improved performance can be applied to existing fire doors.

In addition, a problem to be solved by the present invention is to improve the crime prevention function of the fire door by forming the front and rear faces of the fire door to be double.

The problems to be solved by the present invention are not limited to the above-mentioned problems. It is to be understood by those skilled in the art that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof.

A fire door according to the present invention includes: a main fire door having a plurality of long holes in an inner rim at regular intervals; An inner heat insulating member disposed inside the main fire door and having an inner heat insulating space formed in a closed form with six sides; A heat insulating material filled inside the main fire door and around the internal heat insulating material; A non-combustible internal thermal insulating packing disposed between an outer rim of the inner heat insulating body and an inner rim of the main fire door and having an outer rim coupling opening connected to the insulating ridge; A flat plate disposed at a predetermined distance in the front direction of the main fire door, a folding plate disposed in the front direction of the flat plate and having an open side, a support pipe spacing the flat plate from the folding plate at a predetermined interval, An auxiliary fire door on the front face of the main fire door, which is composed of a finishing plate connected to the coupling hole, a heat insulating material filled between the flat plate and the bent plate, and an insulating groove formed between an outer edge of the flat plate and an inner edge of the bending plate; A heat insulating packing having one side thereof in contact with the main fire door and the other side in contact with the flat plate, the bent plate and the heat insulating groove, the fastening part being coupled through the flat plate and the bolt head being composed of spaced bolts contacting with the main fire door, A space holding unit disposed between the fire door and the auxiliary fire doors; A heat insulating space formed by the space holding unit; The bolt head is buried in the fastening hole connecting groove of the bending plate, and the screwed fastening portion is fastened to the bending plate, the supporting pipe, the flat plate and the bottom plate of the space holding unit, A main fire door that is sequentially penetrated and fastened to couple and fix the auxiliary fire door and the main fire door; A door frame which surrounds the main fire doors and the auxiliary fire doors and has a plurality of heat insulating holes; And a door frame packing arranged at a portion of the main fire door facing the front edge of the main door and being fixed to the door frame so that one end of the door is in contact with the internal heat insulating packing.

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Since the auxiliary fire doors are installed on the front side of the main fire doors in order to form the heat insulation spaces between the fire doors, the heat conduction between the main fire doors and the auxiliary fire doors is blocked or minimized. It is possible to provide a fire door which is capable of preventing the deformation (so-called deep-fogging) and condensation of the fire door, and which is substantially excellent in fire performance (prevention of flame transition, etc.) Furthermore, since the fire door is a dual structure having a main fire door and an auxiliary fire door, it is possible to maximize functions such as soundproofing, wind and insulation.

Further, according to the present invention, it is possible to obtain a heat insulation device using a fire door by combining a fire door with the above-mentioned effect and a door frame in which the heat insulating hole is formed, so that the heat is transferred between the front and rear faces of the fire door, It is possible to substantially exhibit the effect of the fire door, and also to prevent the fire door from being lost by the door frame.

Further, according to the present invention, the front and rear surfaces of the fire door are formed as double fire doors, and the security function of the fire door is improved due to the rigid structure.

1 is a cross-sectional view illustrating a first embodiment of a heat insulating apparatus using a fire door according to the present invention.
2 is an exploded perspective view of FIG.
3 is a partial enlarged view of Fig.
4 is a cross-sectional view illustrating a second embodiment of a heat insulating apparatus using a fire door according to the present invention.
5 is a cross-sectional view illustrating a third embodiment of a heat insulating device using a fire door according to the present invention.
FIG. 6 is a cross-sectional view illustrating a fourth embodiment of a heat insulating apparatus using a fire door according to the present invention.
7 is an exemplary view showing another structure of the internal heat insulating member of the fourth embodiment of the heat insulating device using the fire door according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The known configurations and their associated operations are omitted or briefly described, and the size of each element or a specific portion constituting the element in the drawings may be exaggerated, omitted, or schematically shown for convenience and clarity of description . In the following description, the actual surface and the back surface direction refer to the directions shown in Fig.

FIG. 1 is a cross-sectional view showing a first embodiment of a heat insulating apparatus using a fire door according to the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a partially enlarged view of FIG.

The fire door according to the present invention includes a main fire door 100, an auxiliary fire door 200 disposed on the front of the main fire door 100, a space holding unit 200 disposed between the main fire door 100 and the auxiliary fire door 200, A heat insulating space 400 formed by the space holding unit 300 and a fastener 500 for fastening the main fire door 100 and the auxiliary fire door 200 to each other.

The main fire door 100 includes an outer shell 110 formed by bending a plate, a reinforcing frame 120 disposed on both sides of the outer shell 110, and a heat insulating material GW filled in the outer shell 110 .

The outside sheathing 110 is a plate having a predetermined thickness and has a rectangular shape whose cross section viewed in the upper direction is long in the horizontal direction and the inside is vacated. The end portions of the outside sheathing 110 are bonded by a seaming method.

The reinforcement frame 120 is a curved plate member having a "C" shape in cross section as viewed from the top, and is disposed on both sides of the inside of the outside sheathing 110. The reinforcing frame 120 may be omitted if necessary. The main fire door 100 in which the reinforcing frame 120 is excluded is light in weight and the production cost is also reduced.

The heat insulating material GW is formed of a material having high thermal insulation or high heat resistance including glass wool. However, the heat insulating material GW according to the present invention is a material having high heat insulation and heat resistance, and may be made of fiber such as glass surface, rock surface, and asbestos, , A foamed plastic plate (foamed styrol and the like), or a ceramic type such as a refractory brick, a heat resistant block, and a heat resistant tile can be used.

The auxiliary fire door 200 includes a flat plate 210 spaced a predetermined distance from the front of the main fire door 100, a bent plate 220 disposed in the front direction of the flat plate 210, A finishing plate 250 connected to the bending plate 220 and connected to the flat plate 210 and the bending plate 220. The supporting pipe 240 is disposed between the flat plate 210 and the bending plate 220, And a heat insulating groove 260 formed between the outer edge of the flat plate 210 and the inner edge of the bent plate 220.

The flat plate 210 is a plate having a predetermined thickness and is spaced apart from the main fire door 100 by a distance from the heat insulating space 400. The bent plate 220 is disposed in such a shape as to cover the flat plate 210 as a hollow shape having one side opened. A fastener fitting groove 230 is formed in the front direction of the bending plate 220 in the vertical direction. The fastener coupling groove 230 is recessed so that one end of the fastener 500, such as a bolt head, is buried in the fastener coupling groove 230.

A pipe-shaped support pipe 240 is disposed inside the flat plate 210 and the bent plate 220 so that a space is formed between the flat plate 210 and the bent plate 220. A fastener (500) is connected to the support pipe (240). The support pipe 240 is formed of a non-combustible material and a low thermal conductivity material.

The finishing plate 250 is connected to the fastener fitting groove 230. The finishing plate 250 has a shape corresponding to the shape of the coupling hole connecting groove 230 and has a thickness smaller than the depth of the coupling hole connecting groove 230. The finishing plate 250 connected to the bent plate 220 is configured to prevent the fastening tool 500 from being visible when the auxiliary fire door 200 is viewed from the front side.

The heat insulating groove 260 is formed to prevent the contact between the flat plate 210 and the bent plate 220 to prevent the heat conduction between the flat plate 210 and the bent plate 220. The flat plate 210 and the bent plate 220 of the auxiliary fire door 200 are prevented from being in direct contact with each other by the adiabatic groove 260 and the heat conduction is cut off and the support pipe 210 disposed between the flat plate 210 and the bent plate 220 (240) is formed of a material having a minimized thermal conductivity to minimize heat conduction between the flat plate (210) and the bent plate (220). Since the heat insulating material GW is the same as the heat insulating material GW filled in the main fire door 100, a description thereof will be omitted.

A space holding unit 300 is disposed between the main fire door 100 and the auxiliary fire door 200 to form a heat insulating space 400. The space maintaining unit 300 includes a heat insulating packing 310 whose one side is in contact with the main fire door 100 and the other side is in contact with the flat plate 210, the bent plate 220 and the heat insulating groove 260, The bolt head includes a spacing bolt 320 that contacts the main flap door 100. The bolt head 320 is coupled to the flat plate 210,

The heat insulating packing 310 is formed of a non-combustible material having a low thermal conductivity, and the inside can be hollow. The hollow heat-insulating packing 310 is reduced in weight and can further improve the heat insulating function between the main fire door 100 and the auxiliary fire door 200. The spacing bolt 320 is composed of two or more bolts and is formed so as to separate the main fire door 100 and the auxiliary fire door 200 by the thickness of the bolt head.

The fastener 500 includes mechanical fastening means such as bolts and the like. The fastener 500 is connected in a direction from the front of the bending plate 220 to the direction of the main fire door 100. The fastening part with the bolt head buried in the fastening hole connecting groove 230 and the threaded fastening part is fastened to the bent plate 220, And passes through the support pipe 240 and passes through the flat plate 210 and the main flap door 220 and is engaged and fixed between the auxiliary flap door 200 and the main flap door 100.

The fire door of the present invention blocks heat conduction between the main fire door 100 and the auxiliary fire door 200 by the heat insulating space 400 and the heat insulating packing 310 formed between the main fire door 100 and the auxiliary fire door 200. The shape change of the fire door due to the fire by the combined action of the heat insulating material GW filled in the main fire door 100 and the auxiliary fire door 200 and the heat insulating space 400, the heat insulating packing 310 and the spacing bolts 320 So that the transition of the fire by the fire door is prevented. The heat insulating grooves 260 of the auxiliary fire doors 200 block the heat conduction between the front and rear sides of the auxiliary fire doors 200 to further improve the fire performance and the heat insulation performance of the fire doors.

The door frame 600 according to the present invention is based on a known door frame in the form of a frame which surrounds the fire doors in upper, lower, right and left sides and in which a metal plate of a predetermined thickness is bent.

The door frame 600 includes an outer side surface 610, a first supporting surface 620 bent in the front direction from the outdoor side surface 610, a first packing groove 620 formed at an end of the first supporting surface 620, A second supporting surface 630 extending from one side end of the first packing groove 621 in the front direction and an inner side surface 640 bending at the front end of the second supporting surface 630, And a raised surface 650 bent at the ends of the outdoor side surface 610 and the indoor side surface 640.

The first supporting surface 620 is arranged to surround the main fire door 100 and a part of the door frame packing 700 is connected to the first packing groove 621.

The first and second heat insulating holes 622 and 623 are disposed on two of the three sides of the first packing groove 621 at regular intervals. Two of the three surfaces mentioned above refer to a surface in contact with the wall of the three surfaces forming the first packing groove 621. In detail, the two surfaces of the first packing groove 621 are formed by a first bearing surface 620 and a first bearing surface 620 that are bent at 90 degrees from the three surfaces forming the first packing groove 621. The first 1a heat-insulating hole 622 and the first b heat-insulating hole 623 are alternately arranged.

The first 1a heat-insulating hole 622 and the first heat-insulating hole 623 are formed on two of three surfaces of the first packing groove 621 at regular intervals with slots having a predetermined length. The first 1a heat-insulating hole 622 and the first heat-insulating hole 623 are alternately arranged so as to minimize thermal conduction between the front and rear door frames 600 during a fire, And the first b heat-insulated hole 623, thereby significantly improving the heat shielding of the door frame 600. [0064]

The door frame packing 700 includes a body 710 to be inserted into the first packing groove 621, at least two protrusions 720 protruding from the body 710, And includes a sealing blade 730. The door frame packing 700 is formed of a non-combustible material and a low thermal conductivity material.

The inside of the body 710 may be hollow. The projecting step 720 of the body 710 is formed on two or more of four sides of the body 710. The protrusion 720 prevents the change of the position of the body 710 in the first packing groove 621 and prevents air from flowing between the body 710 and the first packing groove 621 . The sealing vane 730 is formed to protrude from one side of the body and is formed with a hollow inside so as to be in contact with the fire door to block the flow of air. The sealing wing 730 of the door frame packing 700 connected to the first packing groove 621 contacts the main fire door 100.

FIG. 4 is a cross-sectional view illustrating a second embodiment of a heat insulating apparatus using a fire door according to the present invention, and FIG. 5 is a cross-sectional view illustrating a third embodiment of a heat insulating apparatus using a fire door according to the present invention.

As shown in the drawings, the insulating device using the fire doors according to the second and third embodiments of the present invention includes a second packing groove 631 formed on a second bearing surface 630 of the door frame 600, The door frame packing 700 is connected to the second packing groove 631 and the second 2a heat insulating hole 632 and the secondb heat insulating hole 633 are formed on two of three surfaces of the second packing groove 631 The second embodiment is configured in the same manner as the first embodiment.

The second supporting surface is formed to surround the auxiliary fire door 200, and a part of the door frame packing 700 is connected to the second packing groove 631. The sealing wing 730 of the door frame packing 700 connected to the second packing groove 631 is brought into contact with the auxiliary fire door 200. The door frame packing 700 connected to the second packing groove 631 has the same configuration as that of the door frame packing 700 connected to the first packing groove 621, and a detailed description thereof will be omitted.

The second packing groove 631 is formed on two of the three sides of the second packing groove 631 at a predetermined interval with a second heat insulating hole 632 and a second heat insulating hole 633). The two surfaces on which the second and third heat insulating holes 632 and 633 are formed mean a surface in contact with the wall. If all three sides of the second packing groove 631 are in contact with the wall, two surfaces can be arbitrarily selected. On the two surfaces of the second packing groove 631 which are in contact with the wall, 632 and the second b heat-insulating hole 633 are formed. The constitution and action of the 2a heat-insulating hole 632 and the 2b heat-insulating hole 633 are the same as those of the 1a heat-insulating hole 622 and the 1b heat-insulating hole 623, and a detailed description thereof will be omitted.

The heat insulating device using the fire door according to the second and third embodiments of the present invention includes the heat insulating space 400 and the heat insulating packing 310 formed between the main fire door 100 and the auxiliary fire door 200, Of the door frame 600 is formed by the double-door frame packing 700 and the first and second heat insulating holes 622, 623, 632, and 633, And the heat conduction to the main fire door 100 and the auxiliary fire door 200 is blocked through the door frame 600 and the shape change of the fire door due to the high temperature is prevented.

FIG. 6 is a cross-sectional view illustrating a fourth embodiment of a heat insulating apparatus using a fire door according to the present invention.

The fourth embodiment of the heat insulating device using the fire door according to the present invention is the same as the above-described third embodiment according to the present invention except for the fire door. Therefore, the fire door of the fourth embodiment according to the present invention will be described in detail below.

Referring to the drawings, a fire door of a fourth embodiment according to the present invention includes a main fire door 100 ', an internal heat insulating space 111' formed inside the main fire door 100 ' 'And a heat insulating material GW filled in the main fire door 100'. Since the heat insulating material GW has been described above, a detailed description thereof will be omitted.

The main fire door 100 'is formed by bending a plate, and a step hole 101' formed in an inner edge of the main fire door 100 'may be formed. The main fire door 100 'is a plate having a predetermined thickness and has a rectangular shape whose horizontal cross-section is viewed in the upward direction. The interior of the main fire door 100' is hollow and the ends of the main fire door 100 'are joined by a seaming method. The insulation hole 101 'is formed as an elongated groove formed at a predetermined interval to prevent heat conduction between the front and rear surfaces of the main fire door 100'. In addition, the mounting hole 121 'of the inner heat insulating packing 120' is connected to secure the inner heat insulating packing 120 ', and the front and rear surfaces of the main fire door 100' So as to block interheat heat conduction. The short hole 101 'is configured to correspond to the number and shape of the coupling protrusions 121' formed in the inner heat insulating packing 120 '.

The inner heat insulating member 110 'may be an enclosure 112' in which the inside is empty and the six sides are closed. The empty interior of the housing 112 'is formed as an internal heat insulating space 111'. The upper and lower lengths of the housing 112 'are formed to be shorter than the upper and lower lengths of the main fire door 100', and the left and right lengths of the housing 112 ' . Thus, the housing 112 'is shaped to be housed inside the main fire door 100'.

The inner heat insulating packing 120 'is formed of a non-combustible material having low thermal conductivity and is disposed between the outer rim of the housing and the inner rim of the main fire door 100' to prevent direct contact between the housing and the main fire door 100 ' . An engagement protrusion 121 'is formed on the outer edge of the inner heat insulating packing 120' and the engagement protrusion 121 'corresponds to the number and shape of the insulator 101' of the main fire door 100 ' . The coupling protrusion 121 'is connected to the insulation hole 101' of the main fire door 100 'so as to firmly fix the internal insulation packing 120', and the front and rear surfaces of the main fire door 100 ' So as to block interheat heat conduction.

7 is an exemplary view showing another structure of the internal heat insulating member of the fourth embodiment of the heat insulating device using the fire door according to the present invention.

The inner heat insulating space 111 'is formed by an inner heat insulating material 110', and the inner heat insulating material 110 'may be two plates 113'. The two plates 113 'are spaced apart from each other in the forward and backward directions of the main fire door 100' within the main fire door 100 'and the outer edges of the two valves 113' ', And a space between the two plates 113' is formed as an internal heat insulating space 111 '.

6, the door frame packing 700 connected to the first packing groove 621 of the door frame 600 according to the fourth embodiment of the present invention and the door frame packing 700 connected to the second packing groove 631 Is brought into contact with the main fire door 100 '.

In the fourth embodiment according to the present invention, the same door frame 600 as that of the third embodiment is illustrated, but the door frame 600 shown in the first embodiment and the second embodiment is combined with the fire door shown in the fourth embodiment It is to be understood that within the spirit and scope of the invention.

The fire door according to the fourth embodiment of the present invention forms an internal heat insulating space 111 'by the enclosure in the interior of the main fire door 100' and the main fire door 100 ' Prevents deformation of fire door by preventing contact of enclosure and heat by heat from fire, and prevents spread of fire by preventing deformation of fire door.

The coupling protrusion 121 'of the inner heat insulating packing 120' connected to the connecting coupling hole 101 'of the main fire door 100' also blocks heat conduction between the front and rear sides of the fire door, It improves the performance of windshield, condensation prevention, etc.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention as set forth in the following claims. Should belong to the scope of claims of the attached patent registration.

100: main fire door 110: exterior
120: reinforced frame 200: auxiliary fire door
210: flat plate 220: bent plate
230: fastener fitting groove 240: support pipe
250: finishing plate 300: space holding unit
310: Insulation packing 320: Spacer bolt
400: Insulating space 500: Fastener
600: door frame 610: outdoor side
620: first supporting surface 621: first packing groove
622: 1a 1a heat-insulating hole 623: 1b heat-insulating hole
630: second supporting surface 631: second packing groove
632: a 2a insulation hole 633: a 2b insulation hole
640: indoor side 650:
700: door frame packing 710: body
720: protruding jaw 730: sealing wing
100 ': main fire door 101'
110 ': Inner heat insulating member 111': Inner heat insulating space
112 ': Housing 113': Plate
120 ': Inner insulating packing 121': Coupling protrusion

Claims (7)

delete delete delete delete delete delete A main fire door (100 ') in which a plurality of slots (101') having a long groove shape are formed at regular intervals on an inner side of the main door;
An inner heat insulating member 110 'disposed inside the main fire door 100' and having an inner heat insulating space 111 'formed in a closed form with six surfaces;
A heat insulating material (GW) filled in the main fire door (100 ') and the inner heat insulating material (110');
A non-flammable internal heat insulating seal 101 'is disposed between the outer edge of the inner heat insulating member 110' and the inner edge of the main fire door 100 'and the engaging protrusion 121' of the outer edge is connected to the heat insulating hole 101 ' (120 ');
A flat plate 210 disposed at a predetermined distance from the front of the main fire door 100 ', a folding plate 220 disposed in a front direction of the flat plate 210 and having one side opened, A supporting pipe 240 for separating the bent plate 220 and the bent plate 220 from each other by a predetermined distance, a finishing plate 250 connected to the fastening hole connecting groove 230 of the bent plate 220, And a heat insulating groove 260 formed between the outer edge of the flat plate 210 and the inner edge of the bent plate 220. The auxiliary gate GW is filled in between the outer edge of the flat plate 210 and the inner edge of the bent plate 220, A fire door (200);
A heat insulating packing 310 whose one side is in contact with the main fire door 100 'and whose other side is in contact with the flat plate 210, the bent plate 220 and the heat insulating groove 260, And the bolt head is composed of a spacing bolt 320 contacting the main fire door 100 'and is disposed between the main fire door 100' and the auxiliary fire door 200;
A heat insulating space (400) formed by the space holding unit (300);
The bolt head is buried in the fastening hole connecting groove 230 of the bending plate 220 and the bolt head is buried in the fastening hole connecting groove 230 of the bending plate 220. [ The formed fastening portion is sequentially penetrated and fastened through the bent plate 220 of the space holding unit 300, the support pipe 240, the flat plate 210 and the main fire door 100 ', and the auxiliary fire door 200 and the main fire door 100 '), and a fastener (not shown).
A door frame 600 installed around the rim of the main fire door 100 'and the auxiliary fire door 200 and having a plurality of heat insulating holes 622 and 623;
And a door frame packing 700 which is disposed at a portion of the main fire door 100 'in contact with the front edge of the main fire door 100' and which is fixed to the door frame 600 so that one end thereof is in contact with the internal heat insulating packing 120 ' Insulation device using fire door.

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