KR102439551B1 - Both left and right type fire door - Google Patents

Abstract

In accordance with the present invention, a left/right-combined fire door includes: a door frame member installed and fixed to a wall of a building, and formed into a rectangular shape including an upper door frame, a lower door frame and a side door frame formed with a metal material; a door member combined with the door frame member to be rotatable and formed into a square shape with a metal material; an upper sliding rail part formed in an upper door frame of the door frame member; a lower sliding rail part formed in a lower door frame of the door frame member; an upper door frame hinge member combined with the upper sliding rail part to be slidable; a lower door frame hinge member combined with the lower sliding rail part to be slidable; a fixing member fixing the upper door frame hinge member and the lower door frame hinge member to the door frame member; an upper door hinge member combined with an upper end part in a side part of the door member; and a lower door hinge member combined with a lower end part in a side part of the door member. As the door member is formed to be vertically symmetrical with respect to a height direction center line, in a state in which the door member is vertically inverted, the upper and lower door frame hinge members can be combined with the upper or lower door hinge member. In accordance with the present invention, a position of a handle can be accurately changed to a left side or a right side depending on a situation of a fire door installation site, and construction in the fire door installation site can become more accurate and more convenient, which can lead to a quick and accurate fire door installation. Moreover, the mechanical support strength of the entire fire door can be enhanced, and the fire door can be prevented from being twisted or deformed in spite of a long-period operation.

Description

Fire door for both left and right {BOTH LEFT AND RIGHT TYPE FIRE DOOR}

The present invention relates to a fire door for both left and right, and more particularly, the handle can be selectively disposed on the right or left side depending on the site situation, and the installation and construction on the site is accurate and convenient, and the fire door can be installed while absorbing vibration. The invention relates to a fire door for both left and right that is configured to increase the overall mechanical strength.

Fire doors are mainly used to prevent the spread of fire in common houses, factories, and offices.

In general, the fire door is generally formed of a strong metal material so as not to be deformed even by a pressure difference between the inside and outside of the fire door due to a fire.

In addition, a flame retardant is disposed inside the fire door so as not to be burned even at high heat caused by a flame.

In addition, the fire door should have several mechanical properties to prevent the propagation and spread of flame.

The fire door is disposed in a door frame formed in a square shape, and a hinge for rotation of the fire door is installed between the door frame and the fire door.

In addition, the fire door is provided with a handle for a user's entry and exit, and the handle is rotated to bind or release the fire door to the door frame.

However, depending on the situation of the installation site of the fire door, there may be a case in which the handle portion for entry and exit must be installed at a different location from the fire door.

That is, in a space on one side of the fire door as a reference, the handle part may be installed on the left side of the fire door or need to be installed on the right side depending on circumstances.

When the handle part is installed on the left side of the fire door in the space on one side of the fire door, the result is that the handle part is installed on the right side in the space opposite the fire door. In this case, in the space opposite to the fire door, it is installed on the left side.

However, in the case of a fire door, the fire door and the door frame must be placed in an accurate relative position due to their unique function and weight.

Therefore, rather than changing the positions of the handle part and the hinge at the site where the fire door is to be installed, it is preferable to be configured so that the position can be changed according to the site conditions at the initial stage of the manufacturing plant.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a left-right combined fire door configured to accurately change the handle position of the fire door.

Another object of the present invention is to provide a fire door for both right and left, which is configured so that the construction at the site of the fire door installation is accurate and convenient.

Another object of the present invention is to provide a left-right combined fire door configured to increase the overall mechanical strength of the fire door.

Another object of the present invention is to provide a left-right combined fire door configured to prevent distortion or deformation of the fire door even in the case of long-term operation.

Another object of the present invention is to provide a fire door for both left and right that is configured to buffer vibrations generated in the case of an earthquake or the like.

A fire door for both left and right according to the present invention for achieving the above object is fixedly installed on the wall of a building, and a door frame member composed of a rectangular shape including an upper door frame, a lower door frame, and a side door frame formed of a metal material; A door member rotatably coupled to the door frame member and having a rectangular shape made of a metal material, an upper sliding rail portion formed on an upper door frame of the door frame member, and a lower door frame formed on the door frame member A lower sliding rail part, an upper door hinge member slidably coupled to the upper sliding rail part, a lower door twist member slidably coupled to the lower sliding rail part, and the upper door hinge member and the lower part A fixing member for fixing the door frame hinge member to the door frame member, an upper door hinge member coupled to the upper end from the side of the door member, and a lower door hinge member coupled to the lower end from the side of the door member. , the door member is vertically symmetrical with respect to the center line in the height direction, and in a state in which the door member is vertically inverted, the upper door hinge member and the lower door hinge member are attached to the upper door hinge member or the lower door hinge member. It is characterized in that it is configured to be selectively coupled.

Preferably, accommodating recesses are formed on both sides of the door frame member for accommodating the door frame engaging part of the handle installed on the door member, and the cover member is detachably coupled to the receiving recess.

In addition, the upper door frame hinge member and the lower door frame hinge member may include a door frame hinge portion formed by protruding from the center and a door frame coupling portion formed laterally from the door frame hinge portion.

In addition, the upper sliding rail portion and the lower sliding rail portion may be integrally formed with the upper door frame and the lower door frame.

Here, both ends of the upper sliding rail part and the lower sliding rail part may be fixed to the upper door frame and the lower door frame.

Preferably, both ends of the upper sliding rail part and the lower sliding rail part are coupled across both the upper door frame and the side door frame.

In addition, the upper sliding rail portion and the lower sliding rail portion may be formed with sliding openings for the passage of the door frame hinge portion and the door frame coupling portion.

In addition, the coupling means may be coupled to the door frame coupling part, so that the upper door frame hinge member and the lower door frame hinge member may be coupled to the upper door frame and the lower door frame.

Preferably, when the upper sliding rail part and the lower sliding rail part are coupled to the upper door frame and the lower door frame, both ends of the sliding opening are configured to be formed up to the central position of the side door frame.

Here, the sliding opening may include a central sliding opening formed in the center of the sliding rail portion and an upper sliding opening formed in an upper portion of the central sliding opening.

Preferably, a filler is filled inside the upper sliding rail part and the lower sliding rail part.

Here, the filler may be formed by mixing a flame retardant with a base formed of a synthetic resin material.

In addition, the filler may be filled in a state in which the strength reinforcing member is inserted into the upper sliding rail portion and the lower sliding rail portion.

Preferably, the strength reinforcing member is formed of a metal rod having a rectangular cross section.

Alternatively, the strength reinforcing member may be formed of a metal rod having a "T"-shaped cross section.

Here, an uneven portion may be formed on the surface of the strength reinforcing member.

According to the present invention, the position of the handle can be accurately changed to the left or right according to the situation of the fire door installation site.

In addition, the construction of the fire door installation site becomes accurate and convenient, so that the fire door can be installed quickly and accurately.

In addition, it is possible to increase the overall mechanical support strength of the fire door.

In addition, even in the case of long-term operation, it is possible to prevent distortion or deformation of the fire door.

In addition, vibrations generated in the case of an earthquake or the like can be buffered.

The accompanying drawings are for understanding the technical spirit of the present invention together with the detailed description of the present invention, so the present invention should not be construed as limited to the matters shown in the following drawings.
1 is a front view of a fire door for both left and right according to an embodiment of the present invention;
2 is a perspective view of the fire door;
3 is a front view of a fire door for both left and right according to another embodiment of the present invention;
4 is a perspective view of the fire door;
5 is a partial perspective view of the lower right of the fire door;
6 is an exploded perspective view of the lower right,
7 is a partial perspective view of the upper right of the fire door,
8 is an exploded perspective view of the upper right,
9 is an exploded perspective view of a receiving concave portion formed in the side door frame of the fire door;
10 is a partial perspective view of the lower part of the fire door;
11 is a partial cross-sectional view taken along line AA of FIG. 10;
12 is a cross-sectional view of a portion BB of FIG. 10 ,
13 is a perspective view of a strength reinforcing member according to an embodiment of the present invention;
14 is a perspective view of a strength reinforcing member according to another embodiment of the present invention;
15 is a partial perspective view of a hinge member according to another embodiment of the present invention;
16 is an exploded perspective view of the hinge member;
17 is a perspective view of a sliding rail according to another embodiment of the present invention.

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, the terms used in the present specification and claims should not be construed as being limited in the dictionary meaning, and based on the principle that the inventor can appropriately define the concept of the term to describe his invention in the best way. , should be interpreted as meanings and concepts consistent with the technical spirit of the present invention.

Accordingly, the configurations shown in the embodiments and drawings described in the present specification are only preferred embodiments of the present invention, and do not express all the technical ideas of the present invention, so various equivalents that can be substituted for them at the time of the present application It should be understood that water and variations may exist.

Fig. 1 is a front view of a fire door for both left and right according to an embodiment of the present invention, Fig. 2 is a perspective view of the fire door, Fig. 3 is a front view of a fire door for both left and right according to another embodiment of the present invention, and Fig. 4 is the fire door 5 is a partial perspective view of the lower right of the fire door, FIG. 6 is an exploded perspective view of the lower right, FIG. 7 is a partial perspective view of the upper right of the fire door, FIG. 8 is an exploded perspective view of the upper right, and FIG. is an exploded perspective view of a receiving concave portion formed in the side door frame of the fire door, FIG. 10 is a partial perspective view of the lower portion of the fire door, FIG. 11 is a partial cross-sectional view taken along line A-A of FIG. A partial cross-sectional view, FIG. 13 is a perspective view of a strength reinforcing member according to an embodiment of the present invention, FIG. 14 is a perspective view of a strength reinforcing member according to another embodiment of the present invention, and FIG. 15 is another embodiment of the present invention 16 is an exploded perspective view of the hinge member, and FIG. 17 is a perspective view of a sliding rail according to another embodiment of the present invention.

1 to 4, the fire door for both left and right according to the present invention is fixedly installed on the wall of the building, and the upper door frame (2), the lower door frame (4) and the side door frame (6, 8) are formed of a metal material. A door frame member 10 configured in a rectangular shape including ), the upper sliding rail portion 30 formed on the upper door frame 2, the lower sliding rail portion 40 formed on the lower door frame 4 of the door frame member 10, and the upper sliding rail The upper door hinge member 50 slidably coupled to the part 30, the lower door twist member 60 slidably coupled to the lower sliding rail part 40, and the upper door twist member Fixing members 55 and 65 for fixing the 50 and the lower door frame hinge member 60 to the door frame member 10, and the upper door hinge member coupled to the upper end from the side of the door member 20 (70) and a lower door hinge member (80) coupled to the lower end from the side of the door member (20), wherein the door member (20) is vertically symmetrical with respect to the center line (C) in the height direction, , the upper door hinge member 50 and the lower door hinge member 60 are coupled to the upper door hinge member 70 or the lower door hinge member 80 in a state in which the door member 20 is vertically inverted. It is characterized in that it is configured to be able to do so.

The door frame member 10 is formed in a long rectangular shape as a whole and is fixedly installed on the entrance wall of the building.

The door frame member 10 is formed of a metal material such as steel or stainless steel, and a space for accommodating the door member 20 is formed therein.

The door frame member 10 includes an upper door frame 2 , a lower door frame 4 , and both side door frames 6 and 8 , and has a rectangular shape.

The door member 20 is formed of a metal material such as steel or stainless steel in a rectangular shape as a whole.

In the case of a fire door, a flame retardant material may be filled inside the door member 20. At this time, in order to increase the overall support strength of the door member 20, the flame retardant material has a continuous hexagonal shape such as a honeycomb. can be arranged to achieve

An upper sliding rail portion 30 is formed on the upper door frame 2 of the door frame member 10 .

In addition, a lower sliding rail portion 40 is formed on the lower door frame 4 of the door frame member 10 .

The upper and lower sliding rail parts 30 and 40 are formed in the horizontal direction in the upper door frame 2 and the lower door frame 4 .

Thus, both ends of the upper sliding rail part 30 and the lower sliding rail part 40 are fixed to the upper door frame 2 and the lower door frame 4 , respectively.

At this time, as shown in FIGS. 1 and 7, preferably, both ends 32 of the upper sliding rail part 30 are coupled from the upper door frame 2 to the side door frames 6 and 8. do.

In addition, both ends 42 of the lower sliding rail part 40 are coupled from the lower door frame 4 to the side door frames 6 and 8 .

In general, the upper door frame 2, the lower door frame 4, and the side door frames 6 and 8 are formed in the form of a hollow tube having a substantially rectangular shape.

In this state, the upper door frame 2, the lower door frame 4, and the side door frames 6 and 8 are combined to form the door frame member 10 having a rectangular shape as a whole.

The portion vulnerable to deformation in the door frame member 10 is a boundary portion between the upper door frame 2 and the side door frames 6 and 8, and the lower door frame 4 and the side door frame 6, 8) is the boundary between them.

However, in the present invention, as described above, both ends 32 of the upper sliding rail part 30 and both ends 42 of the lower sliding rail part 40 are the upper and lower door frames 2 and 4 and the side door, respectively. It is joined over the frames 6 , 8 .

Thus, the boundary parts vulnerable to deformation are reinforced by both ends 32 of the upper sliding rail part 30 and both ends 42 of the lower sliding rail part 40 to increase the mechanical strength of the boundary part. can be greatly increased.

When a fire occurs, a very large pressure difference is generated between the inside and the outside with respect to the door member 20 .

If a fire occurs inside the door member 20, the inside is in a state close to a kind of vacuum. At this time, due to the pressure applied to the door member 20, the door frame member 20 is can be deformed.

If the door frame member 20 is deformed, a situation in which the door member 20 cannot be smoothly opened may occur.

However, by increasing the mechanical strength of the boundary portions most vulnerable to deformation as described above to prevent deformation of the door frame member 10 , it is possible to prevent the door member 20 from being opened.

In addition, the upper door hinge member 50 is slidably coupled to the upper sliding rail part 30 .

In addition, a lower door hinge member 60 is slidably coupled to the lower sliding rail part 40 .

Thus, the upper door hinge member 50 and the lower door hinge member 60 may be moved in the left and right directions in the upper sliding rail part 30 and the lower sliding rail part 40, respectively.

The lower sliding rail part 40 and the lower door hinge member 60 are formed in the same shape as the upper sliding rail part 30 and the upper door hinge member 50 .

6 and 8, the upper door hinge member 50 and the lower door hinge member 60 are formed by protruding from the center of the door frame hinge parts 52 and 62, and the door frame hinge part ( 52 and 62 may include door frame coupling portions 54 and 64 formed from the side toward the side.

In a state in which the hinge shafts 522 and 622 are installed on the door frame hinge parts 52 and 62, hinge rollers 524, 526, 624, and 626 that are relatively rotated with respect to the hinge shafts 522 and 622 are coupled.

In addition, the door hinge members 70 and 80 are fixed to the hinge shafts 522 and 622 through the hinge pins 73 and 83 .

Thus, relative rotation between the door frame hinge members 50 and 60 and the door hinge members 70 and 80 is possible, and as a result, the door member 20 can be rotated.

The coupling configuration between the door frame hinge members 50 and 60 and the door hinge members 70 and 80 according to another embodiment of the present invention is shown in FIGS. 15 and 16 .

In the above embodiment, in a state in which the hinge shaft 622 is installed on the door frame hinge part (only the lower door hinge part 622 is shown), the hinge rollers 624 and 626 that are rotated relative to the hinge shaft 622 are coupled. .

At this time, the hinge rollers 624 and 626 are coupled to each other so as to be rotatable relative to the hinge shaft 622 but not separated from the hinge shaft 622 .

In this state, the door hinge member 80 is fixed to the hinge roller 626 through the bolt 83 .

Thus, the door frame hinge member 60 and the door hinge member 80 are configured to rotate relative to each other, so that the door member 20 can be rotated as a result.

As described above, in the upper sliding rail part 30 and the lower sliding rail part 40, the upper door hinge member 50 and the lower door hinge member 60 can be moved in the left and right directions, respectively. The upper sliding rail part 30 and the lower sliding rail part 40 have sliding openings 34, 36, 44, 46 for the passage of the door frame hinge parts 52 and 62 and the door frame coupling parts 54 and 64. are formed

The sliding openings (34, 36, 44, 46) are the central sliding openings (34, 44) formed in the center of the sliding rail parts (30, 40) and the upper portions formed in the upper portions of the central sliding openings (34, 44). It includes sliding openings (36, 46).

The upper sliding openings 36 and 46 may be formed in the form of a long long hole in the upper portion of the sliding rail units 30 and 40, or may be formed in the form of a long concave portion in the left and right directions.

Thus, when the sliding rail parts 30 and 40 are coupled to the upper door frame 2 and the lower door frame 4, the part opened in the long concave part is the upper door frame 2 and the lower part. It may be closed by the door frame 4 and consequently may be configured to be in the form of a long long hole in the left and right directions.

In this state, in the door frame hinge members 50 and 60, the door frame hinge parts 52 and 62 protrude outward through the central sliding openings 34 and 44, and the door frame coupling parts 54 and 64. protrudes upward through the upper sliding openings 36 and 46 .

In addition, fixing members 55 and 65 such as bolts are fastened to the door frame coupling portions 54 and 64 so that the upper door hinge member 50 and the lower door hinge member 60 are connected to the upper door frame. (2) and the lower door frame (4) may be coupled to each.

Preferably, when the upper sliding rail part 30 and the lower sliding rail part 40 are coupled to the upper door frame 2 and the lower door frame 4, the sliding openings 34, 36, 44, 46 ) both ends are configured to be formed up to the central position of the side door frame (6, 8).

That is, the sliding openings 34 , 36 , 44 , 46 formed in the horizontal direction in the upper sliding rail portion 30 and the lower sliding rail portion 40 pass through the side end portion of the door member 20 . , is formed up to the lower part of the central portion of the side door frames (6, 8).

Thus, the hinge shafts 522 and 622 for rotation of the door member 20 are positioned outside of both side end portions of the door member 20, thereby rotating the door member 20 at a larger angle. can be opened

On the other hand, in a state in which the door member 20 is formed in a long rectangular shape from top to bottom, the handle part 12 is disposed in the middle portion of the height of the door member 20 .

Thus, as a result, the door member 20 is formed vertically symmetrically with respect to the height direction center line (C).

And, the upper door hinge member 70 is coupled to the upper end of the side end of the door member 20, and the lower door hinge member 80 is coupled to the lower end.

In this state, the upper door hinge member 70 is coupled to the hinge rollers 524 and 526 of the door frame hinge part 52 moved to the right, and the lower door hinge member 80 is moved to the right. When coupled to the hinge rollers 624 and 626 of the branch 62, the handle 22 is positioned on the left side as shown in FIG.

And, in a state in which the door member 20 is vertically inverted (rotated), the upper door hinge member 70 is coupled to the hinge rollers 624 and 626 of the door frame hinge part 62 moved to the left, When the lower door hinge member 80 is coupled to the hinge rollers 524 and 526 of the door frame hinge part 52 moved to the left, the handle part 22 is positioned on the right side as shown in FIG. 2 .

Thus, in a state in which the door member 20 is in its original state or in an inverted state, the upper door hinge member 70 and the lower door hinge member 80 are connected to the upper door hinge member 50 or the lower door hinge member. It may be selectively coupled to the member 60 .

In the present invention, as described above, the upper door hinge member 50 and the lower door hinge member 60 are configured to move along the upper sliding rail part 30 and the lower sliding rail part 40. At the installation site of the fire door according to the invention, it is not required to accurately measure the height and horizontality and to install the door member and the hinge member.

That is, as a simple operation of pushing and fixing the upper door hinge member 50 and the lower door hinge member 60 to the left or right in the upper sliding rail part 30 and the lower sliding rail part 40, the fire door The position of the handle can be changed.

Accordingly, it is very easy and accurate to change the position of the handle 22 at the installation site of the fire door.

On the other hand, both sides of the door frame member 10 are formed with receiving recesses 7 and 9 for accommodating the door frame engaging portion 24 of the handle 22 installed on the door member 20 . .

In addition, as shown in FIG. 9 , the cover member 90 is detachably coupled to the receiving recesses 7 and 9 .

And, by separating and removing the cover member 90 at the position of the door frame engaging portion 24 according to the position of the handle 22 , it is configured to accommodate the door frame engaging portion 24 .

Thus, the door frame locking part 24 is accommodated in the receiving recesses 7 and 9 from which the cover member 90 is separated and removed, so that the door member 20 holds the door frame member 10 in a closed state. Alternatively, the door member 20 may be opened from the door frame member 10 by rotating the handle portion 22 .

On the other hand, as shown in FIG. 17 (only the lower sliding rail part is shown), in another embodiment of the present invention, the upper sliding rail part 30 and the lower sliding rail part 40 are the upper door frame (2). and the lower door frame 4 may be integrally formed.

That is, in a state in which the upper sliding rail part 30 and the lower sliding rail part 40 are integrally formed to protrude from the upper door frame 2 and the lower door frame 4, the sliding openings 34, 44, 36, 46) may be formed.

Meanwhile, the filler 110 may be filled in the upper sliding rail part 30 and the lower sliding rail part 40 .

The filler 110 may be formed by mixing a base material formed of a synthetic resin material such as heat-resistant silicone and a flame retardant material such as stone powder.

In addition, as shown in FIG. 12 , the filler 110 may be filled in a state in which the strength reinforcing member 120 is inserted in the upper sliding rail part 30 and the lower sliding rail part 40 .

The strength reinforcing member 120 may be formed of a metal rod such as steel or alloy steel having a rectangular cross-section.

Alternatively, as shown in FIG. 13 , the strength reinforcing member 120 may be formed of a metal rod such as steel or alloy steel having a “T”-shaped cross-section.

Thus, in a state in which the strength reinforcing member 120 is inserted into the inner space of the sliding rail parts 30 and 40, the support strength of the door frame member 10 can be significantly increased by filling the filler 110 .

In addition, since the filler 110 serves as a cushioning material, it is possible to buffer shock or vibration applied from the outside in case of an earthquake or the like.

And, in order to prevent the filler 110 from being separated from the strength reinforcing member 120 even after a long period of time, as shown in FIG. 14 , an uneven portion ( 122) may be formed.

Thus, by increasing the bonding area between the surface of the filler 110 and the strength reinforcing member 120 through the concavo-convex portion 122 , it is possible to prevent separation while increasing the cushioning effect through the filler 110 .

As mentioned above, the terms used in the embodiments of the present invention have the same meanings as commonly understood by those of ordinary skill in the art to which the present invention pertains.

Although the present invention has been described with reference to the limited embodiments and drawings, the embodiments are not intended to limit the technical spirit of the present invention, but rather to explain, the technical spirit of the present invention is not limited thereto, and the present invention pertains to By those of ordinary skill in the art, various modifications and variations will be possible within the technical spirit of the present invention and the equivalent scope of the claims to be followed.

Accordingly, the protection scope of the present invention should be interpreted by the claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

And, as long as it is within the scope of the object of the present invention, all the components may be configured by selectively combining one or more.

The terms "included" or "consisting of" above mean that the corresponding component may be included, and should be construed as being able to additionally include other components.

2: Upper door frame
4: lower door frame
6, 8: side door frame
10: door frame member
20: door member
30: upper sliding rail part
40: lower sliding rail part
50: upper door hinge member
60: lower door hinge member
70: upper door hinge member
80: lower door hinge member
90: cover member
110: filler
120: strength reinforcing member

Claims (16)

a door frame member fixed to the wall of a building and having a rectangular shape including an upper door frame, a lower door frame, and a side door frame formed of a metal material;
a door member rotatably coupled to the door frame member and configured in a rectangular shape as a metal material;
an upper sliding rail portion formed on the upper door frame of the door frame member;
a lower sliding rail portion formed on the lower door frame of the door frame member;
an upper door hinge member slidably coupled to the upper sliding rail;
a lower door hinge member slidably coupled to the lower sliding rail portion;
a fixing member for fixing the upper door frame hinge member and the lower door frame hinge member to the door frame member;
an upper door hinge member coupled to the upper end from the side of the door member;
and a lower door hinge member coupled to the lower end from the side of the door member,
The door member is formed vertically symmetrically with respect to the center line in the height direction,
and wherein the upper door hinge member and the lower door hinge member are selectively coupled to the upper door hinge member or the lower door hinge member in a state in which the door member is vertically inverted. The method of claim 1,
Both sides of the door frame member are formed with receiving recesses for accommodating the door frame engaging portion of the handle installed on the door member, and a cover member is detachably coupled to the receiving recessed portion. 3. The method of claim 2,
The left and right combination fire door, characterized in that the upper door frame hinge member and the lower door frame hinge member include a door frame hinge portion formed by protruding from the center and a door frame coupling portion formed laterally from the door frame hinge portion. 4. The method of claim 3,
The left and right combined fire door, characterized in that the upper sliding rail part and the lower sliding rail part are integrally formed in the upper door frame and the lower door frame. 4. The method of claim 3,
Both ends of the upper sliding rail part and the lower sliding rail part are fixed to the upper door frame and the lower door frame. 6. The method according to claim 4 or 5,
The left and right combination fire door, characterized in that the upper sliding rail portion and the lower sliding rail portion are formed with sliding openings for the passage of the door frame hinge portion and the door frame coupling portion. 7. The method of claim 6,
A left and right combination fire door, characterized in that a coupling means is fastened to the door frame coupling part, and the upper door frame hinge member and the lower door frame hinge member are coupled to the upper door frame and the lower door frame. 8. The method of claim 7,
When the upper sliding rail part and the lower sliding rail part are coupled to the upper door frame and the lower door frame,
Both ends of the sliding opening are configured to be formed up to the central position of the side door frame. 9. The method of claim 8,
The sliding opening comprises a central sliding opening formed in the center of the sliding rail portion and an upper sliding opening formed in an upper portion of the central sliding opening. 9. The method of claim 8,
The left and right combined fire door, characterized in that the filler is filled inside the upper sliding rail portion and the lower sliding rail portion. 11. The method of claim 10,
The filler is a fire door for both left and right, characterized in that the flame retardant is mixed with a base material formed of a synthetic resin material. 12. The method of claim 11,
The left and right combined fire door, characterized in that the filler is filled in a state in which the strength reinforcing member is inserted inside the upper sliding rail portion and the lower sliding rail portion. 13. The method of claim 12,
The strength reinforcing member is a right-and-left fire door, characterized in that it is formed of a metal rod having a rectangular cross section. 13. The method of claim 12,
The strength reinforcing member is a left-right combined fire door, characterized in that it is formed of a metal rod having a "T"-shaped cross-section. 15. The method of claim 14,
A left-right combined fire door, characterized in that an uneven portion is formed on the surface of the strength reinforcing member. 6. The method of claim 5,
Both ends of the upper sliding rail part and the lower sliding rail part are configured to be coupled across both the upper door frame and the side door frame, respectively.

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