KR20240019452A - Two way direction of folding door system without bottom frame type for space advantage with 1 versus 2 of door width - Google Patents

Abstract

The present invention forms a door frame in which a left frame and a right frame are formed on the left and right sides, an upper frame is formed on the upper part, and the bottom does not form a separate frame; In order to provide a folding door system for forming a two-way folding door in which the widths of the left door and the right door are formed in a relative size of 1:2 inside the door frame, the upper part and the upper part of the left door and the right door Each joint is formed at the lower part; The left plate of the joint is attached to the right end of the left door, the end of the left plate is attached to the primary hinge, one end of the middle plate is attached to the primary hinge, and the other end of the middle plate is attached to the right end of the left door. The portion is attached to the secondary hinge portion, the right plate is attached to the left end surface of the right door, and one end of the right plate is attached to the secondary hinge portion, so that the primary hinge portion and the secondary hinge portion are attached to the two doors. It is configured to function as a hinge when the two-way folding door operates; When opening in one direction, the left plate and the middle plate attached to the primary hinge portion are opened at a certain angle, and the middle plate and the right plate attached to the secondary hinge portion are formed to maintain contact with each other; When opening in other directions. The left plate and middle plate attached to the primary hinge portion maintain contact with each other, and the middle plate and right plate attached to the secondary hinge portion are formed to be spaced apart from each other at a predetermined angle; A hinge axis is coupled to the upper and lower surfaces of the left end of the left door, and the left door is opened and closed by rotating around the hinge axis; A sliding portion is formed on one side of the upper part of the right door to perform a sliding function in the left and right directions in the inner passage of the upper frame; The position where the sliding part is mounted is formed at an interval equal to the width of the left door so that the left door and the right door are completely opened with respect to the hinge axis, so that the folding operation is performed smoothly; The goal is to provide a two-way folding door system that utilizes space without thresholds for short and long doors with a door width of 1:2.
This has the effect of forming a hinge axis on the floor and completely removing the lower threshold of the entrance door, allowing people to enter and exit easily. There are two doors on the short and long sides where the width of the right door is relatively twice as large as that of the left door. By simplifying the folding door system formed, production and construction costs are reduced, the area of the window is maximized in a given space, and there is an effect of preventing hands from being caught when the door is closed.

Description

Two way folding door system without bottom frame type for space advantage with 1 versus 2 door width without threshold of short and long side doors {Two way direction of folding door system without bottom frame type for space advantage with 1 versus 2 of door width}

The present invention is a two-way folding door system that utilizes space without thresholds for short and long doors with a door width of 1 to 2. By forming a hinge axis on the floor, the lower threshold of the entrance door is completely removed, allowing people to easily enter and exit, In a folding door in which two doors are joined together, where the width of one door is 50% shorter than the width of the other door to which it is joined, the area of the window is maximized as much as possible for a given width, while preventing hands from being caught, and the damper prevents the door from suddenly closing. It is about a folding door system that prevents

In general, a folding door literally refers to a folding door. It can be used as a replacement for the interior and exterior walls of a building wall, and its durability is guaranteed in response to mechanical external forces. It is also suitable for exterior use as it has soundproofing and windproofing effects. . In addition, by applying glass to the product, visibility can be secured, and the design is excellent, so it is also used for internal purposes.

In addition, in order to make valuable use of space, folding doors open more than 90% of the 50% opening structure of existing doors, creating a spacious living space for residential use and facilitating customer accessibility for commercial use, mainly used in high-end restaurants, apartments, and restaurants. It is being used for entrances or split doors of houses, commercial buildings, etc.

These folding doors are designed so that the entrance can be completely opened in places where there is no space to completely open the door outside the entrance of the wall. The door frame is constructed according to the shape of the entrance, and a plurality of sliding doors are attached to the hinge so that they can rotate around each other. and one end of the sliding door is connected to rotate on one side of the door frame.

The folding connecting bar of a conventional folding joint requires a connecting piece to connect two circular bars to each other, so a connecting piece connecting the circular bars is attached, thereby increasing unnecessary horizontal length and reducing the horizontal transparent space of the transparent glass forming the folding door system. As a result, the space for visual observation is reduced, and the configuration of the connection cover mounted on the upper part requires two at each end, increasing the number of parts. Additionally, the folding connection bar consists of two circular bars and one. Since it is formed of two connecting pieces, the volume of the material increases and the construction cost also increases.

Republic of Korea Patent Publication No. 1686470 Republic of Korea Patent Publication No. 2257515

The present invention was devised to solve the above problems. The purpose of the present invention is to form a lower hinge coupling hole close to the floor using a door coupling part, install a hinge axis, and completely remove the lower threshold of the door. It allows people to enter and exit easily, and also simplifies the folding door system formed by two doors on the short side and long side, where the right door width is relatively twice as large as the left door, thereby reducing production and construction costs. , The goal is to provide a two-way folding door system that maximizes the area of the glass window in a given space and utilizes the bottom hinged space of the short- and long-side doors with a door width of 1:2 to prevent hands from being caught when the door is closed.

The present invention is a means to solve the above problems, and the present invention is a door in which a left frame and a right frame are formed on the left and right sides, an upper frame is formed on the top, and a separate frame is not formed on the bottom. forming a frame;

In order to provide a folding door system for forming a two-way folding door in which the widths of the left door and the right door are formed in a relative size of 1:2 inside the door frame, the upper and lower parts of the left door and the right door are formed. Each joint is formed at the lower part; The left plate of the joint is attached to the right end of the left door, the end of the left plate is attached to the primary hinge, one end of the middle plate is attached to the primary hinge, and the other end of the middle plate is attached to the right end of the left door. The portion is attached to the secondary hinge portion, the right plate is attached to the left end surface of the right door, and one end of the right plate is attached to the secondary hinge portion, so that the primary hinge portion and the secondary hinge portion are attached to the two doors. It is configured to function as a hinge when the two-way folding door operates; When opening in one direction, the left plate and the middle plate attached to the primary hinge portion are opened at a certain angle, and the middle plate and the right plate attached to the secondary hinge portion are formed to maintain contact with each other; When opening in other directions. The left plate and middle plate attached to the primary hinge portion maintain contact with each other, and the middle plate and right plate attached to the secondary hinge portion are formed to be spaced apart from each other at a predetermined angle; A hinge axis is coupled to the upper and lower surfaces of the left end of the left door, and the left door 10 is opened and closed by rotating around the hinge axis; A sliding portion is formed on one side of the upper part of the right door to perform a sliding function in the left and right directions in the inner passage of the upper frame; The position where the sliding part is mounted is formed at an interval equal to the width of the left door so that the left door and the right door are completely opened with respect to the hinge axis, so that the folding operation is performed smoothly; The goal is to provide a two-way folding door system that utilizes space without thresholds for short and long doors with a door width of 1:2.

As seen above, the present invention uses a door joint to closely touch the floor surface.

By forming a hinge coupling hole at the bottom and installing the hinge axis, the lower threshold of the entrance door can be completely removed. This has the effect of allowing people to enter and exit easily. The width of the right door is relatively twice as large as that of the left door. By simplifying the folding door system formed by two doors on the short side and the long side, the production and construction costs are reduced, the area of the window is maximized in a given space, and there is an effect of preventing hands from being caught when the door is closed.

In addition, there is no need for unnecessary construction on the floor, and when forming a door folding system, disassembly and assembly are easy.

Figure 1 is a schematic diagram showing a space-utilizing two-way folding door system without thresholds for short and long doors with a door width of 1 to 2 according to the present invention.
Figure 2 is a photograph showing a space-utilizing two-way folding door system without thresholds of short and long doors with a door width of 1 to 2 according to the present invention;
Figure 3 is a photograph showing one-way opening of the folding door joint of the space-efficient two-way single-side and long-side doors adopted in the folding door system according to the present invention;
Figure 4 is a photograph showing the opening in the other direction of the folding door joint of the space-efficient two-way single-side and long-side doors adopted in the folding door system according to the present invention.
Figure 5 is a photograph showing the gap between two doors when the folding door of Figure 1 is completely closed.
Figure 6 is a photograph showing the upper hinge axis and sliding portion of the space-utilizing two-way folding door system without a threshold for short and long doors with a door width of 1 to 2 according to the present invention.
Figure 7 is a photograph showing the sliding portion of the inner passage of the upper frame of the space-utilizing two-way folding door system without thresholds for short and long doors with a door width of 1 to 2 according to the present invention.
Figure 8 is a photograph showing the door joint part of the space-utilizing two-way folding door system without threshold of the short-side and long-side doors with a door width of 1:2 according to the present invention.
Figure 9 is a schematic diagram showing the door coupling part of the space-utilizing two-way folding door system without threshold of the short-side and long-side doors with a door width of 1:2 according to the present invention.

Before describing the various embodiments of the present invention in detail, it will be appreciated that its application is not limited to the details of the configuration and arrangement of components described in the following detailed description or shown in the drawings. The invention may be embodied and practiced in different embodiments and carried out in various ways. Additionally, device or element orientation (e.g. “front”, “back”, “up”, “down”, “top”, “bottom”). The expressions and predicates used herein with respect to terms such as ", "left", "right", "lateral", etc. are merely used to simplify the description of the invention and related devices. Alternatively, you may notice that it does not simply indicate or imply that an element should have a particular orientation. Additionally, terms such as “first,” “second,” and the like are used herein and in the appended claims for purposes of description and are not intended to indicate or imply relative importance or intent.

The present invention has the following features to achieve the above object.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, the terms or words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, and the inventor should appropriately use the concept of terms to explain his or her invention in the best way. It must be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle of definability.

Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so at the time of filing this application, various alternatives are available to replace them. It should be understood that equivalents and variations may exist.

Looking at an embodiment according to the present invention,

A left frame 71 and a right frame 72 are formed on the left and right sides, respectively,

An upper frame 60 is formed at the top, and the bottom does not form a separate frame.

Forms the door frame 100,

In order to provide a folding door system in which the left door 10 and the right door 20 have a relative width of 1:2 inside the door frame 100 to form a mutually coupled two-way folding door,

Forming joints 30 at the upper and lower parts of the left door 10 and the right door 20, respectively;

The left plate 31 of the joint 30 is attached to the right end of the left door 10, the end of the left plate 31 is attached to the primary hinge portion 31a, and the middle plate 32 One end of the middle plate 32 is attached to the primary hinge portion 31a, the other end of the middle plate 32 is attached to the secondary hinge portion 32a, and the right plate 33 is attached to the left end of the right door 20. It is attached to the cross section, and one end of the right plate 33 is attached to the secondary hinge part 32a, so that the primary hinge part 31a and the secondary hinge part 32a allow the two doors to operate as two-way folding doors. It is made to take charge of the hinge function at the time;

When opening in one direction, the left plate 31 and the middle plate 32 attached to the primary hinge portion 31a are opened at a certain angle, and the middle plate 32 attached to the secondary hinge portion 32a and the right plate 33 are formed to maintain contact with each other,

When opening in other directions. The left plate 31 and the middle plate 32 attached to the primary hinge portion 31a maintain contact with each other, and the middle plate 32 and the right plate 33 attached to the secondary hinge portion 32a are They are formed so that they are spaced apart from each other at a certain angle;

A hinge axis (11) is coupled to the upper and lower surfaces of the left end of the left door (10), and the left door (10) is opened and closed by rotating around the hinge axis (11);

A sliding portion 21 is formed on the upper surface of the right door 20 to perform a sliding function in the left and right directions in the inner passage of the upper frame 60, and is opened and closed by folding on the left door 10;

The position at which the sliding part 21 is mounted is spaced at an interval equal to the width of the left door 10 so that the left door 10 and the right door 20 are completely folded and opened with respect to the hinge axis 11. It is formed to enable smooth folding operation; This relates to a two-way folding door system that utilizes space without thresholds for short and long doors with a door width of 1:2.

In addition, the present invention

A damper 80 is attached within the passage of the upper frame 60, so that when the right door 20 is closed, the sliding part 21 is caught by the damper 80, so that the door closes gradually rather than suddenly. so that; It has been accomplished.

In addition, the present invention

When the left door (10) and right door (20) are completely closed,

The left plate 31, the middle plate 32, and the right plate 33 are all in complete contact with each other, and a coupling gap 50 is formed, and the mutual coupling portion of the left door 10 and the right door 20 The thickness of the left plate 31, the middle plate 32, and the right plate 33 is formed so that the coupling gap 50 formed in the gap is formed so that a finger can loosely enter, so that the finger cannot be caught. In addition, the coupling gap 50 is formed so that the windbreak member 40 is attached to the right side plate 33.

In addition, the present invention

The width of the left plate 31 and the right plate 33 is formed to be the same as the width of the end surfaces of the left door 10 and the right door 20, which are correspondingly attached,

The primary hinge portion (31a) and the secondary hinge portion (32a) are formed on the outside of the end surfaces of the left door (10) and the right door (20) so that the folding door is completely closed; It has been accomplished.

In addition, the present invention

A door coupling portion 90 having an upper hinge coupling hole 90a and a lower hinge coupling hole 90b formed in a horizontally bent bending plane on the upper and lower sides is attached to the vertical surface of the left frame 71, and the left door The hinge axis 11 coupled to the upper surface of (10) penetrates the upper surface hinge coupling hole 90a and is fixedly mounted on the upper frame 60, and the hinge axis 11 coupled to the lower surface is hinged to the lower surface. It is coupled to the hole (90b),

The left door 10 is rotated to open and close around the hinge axis 11; It has been accomplished.

Hereinafter, with reference to FIGS. 1 to 9, a space-utilizing two-way folding door system without thresholds for short and long doors with a door width of 1 to 2 according to a preferred embodiment of the present invention will be described in detail.

The folding door system of the present invention is

A left frame 71 and a right frame 72 are formed on the left and right sides, an upper frame 60 is formed on the upper part, and the bottom surface forms a door frame 100 that does not form a separate frame. In particular, the lower part of the door frame does not have a separate frame, that is, there is no threshold, so that many people can enter and exit easily and conveniently, providing a structure that is very easy to enter and exit.

As shown in Figure 1, in the present invention, the left door 10 and the right door 20 are formed in a relative size of 1:2 inside the door frame 100, forming a mutually coupled two-way folding door. To do this, we are preparing a folding door system.

For this purpose, the technical features of the present invention are

It relates to a folding joint used in a folding door consisting of two doors in which the left door (10) and the right door (20) are mutually folded, and the right door (20) is twice the width of the left door (10). It is characterized by being long.

A typical folding door means that a plurality of doors are folded in a zigzag manner or the width of each door is the same, but the folding door of the present invention consists of two doors, the right door (20) and the left door (10). ) is characterized by being twice as long as the width of ), which allows for frequent entry and exit of people or for easy entry and exit in both directions.

The width of the left door is very narrow, about 1/2 the width of the right door, so that people can easily enter and exit in both directions.

The present invention relates to a folding door joint for forming a directional folding door,

For this purpose, to explain in detail,

Joints 30 are formed at the upper and lower parts of the left door 10 and the right door 20, respectively. If necessary, in order to distribute the entire weight of the door, the upper part can be formed with one joint and the lower part with two joints.

Here, as a technical feature of the present invention, the joint 30 will be described in detail as follows.

The left plate 31 forming the joint 30 is attached to the right end of the left door 10, and the end of the left plate 31 is attached to the primary hinge portion 31a, and the middle plate ( One end of 32) is attached to the primary hinge portion 31a.

In addition, the other end of the middle plate 32 is attached to the secondary hinge portion 32a, the right plate 33 is attached to the left end of the right door 20, and one side of the right plate 33 The end portion is attached to the secondary hinge portion 32a.

Here, the primary hinge portion (31a) and the secondary hinge portion (32a) are configured to perform a hinge function when the two doors operate as two-way folding doors.

In addition, as shown in Figures 3 and 4, other technical features of the present invention are

When opening in one direction, the left plate 31 and the middle plate 32 attached to the primary hinge portion 31a are opened at a certain angle, and the middle plate 32 attached to the secondary hinge portion 32a and the right side plate 33 are formed to maintain contact with each other.

Also, when opening in the other direction. The left plate 31 and the middle plate 32 attached to the primary hinge portion 31a maintain contact with each other, and the middle plate 32 and the right plate 33 attached to the secondary hinge portion 32a are so that they are spaced apart at a certain angle; This relates to the space utilization bidirectional folding door joint of single-sided and long-sided doors.

As shown in Figures 1 to 2 and Figures 6 to 7,

This invention

A hinge axis (11) is coupled to the upper and lower surfaces of the left end of the left door (10), and the left door (10) is opened and closed by rotating around the hinge axis (11);

A sliding portion 21 is formed on the upper surface of the right door 20 to perform a sliding function in the left and right directions in the inner passage of the upper frame 60.

also,

The right door 20 is folded and opened and closed by the left door 10, and the sliding part ( The position where 21) is mounted is formed at an interval equal to the width of the left door 10, so that the folding operation can be performed smoothly; It has been accomplished.

In addition, other technical features of the present invention are

A damper 80 is attached within the passage of the upper frame 60, so that when the right door 20 is closed, the sliding part 21 is caught by the damper 80, so that the door closes gradually rather than suddenly. so that; It has been accomplished.

The damper 80 is a known damper, and the sliding part 21 is caught when it reaches the damper 80, and prevents the door from suddenly closing by the elastic force of the inner spring, etc., and has a function of gradually closing the door. When the door is opened, it prevents the door from opening suddenly by using elastic force such as a spring and is responsible for allowing the door to open gradually, so it will be omitted in the present invention.

In addition, as shown in Figures 2 and 5, other technical features of the present invention are

When the left door 10 and the right door 20 are completely closed, the left plate 31, the middle plate 32, and the right plate 33 all contact each other and are completely folded, and the left door ( A coupling gap 50 is formed at the mutual coupling portion of 10) and the right door 20.

Here, the present invention is characterized in that the coupling gap 50 is formed at a gap into which a finger can easily enter, and is formed so that a finger cannot be caught, which means that even if a finger pushes into the coupling gap 50, the This means that the spacing of the coupling gap 50 is formed larger than that of the finger, allowing the finger to loosely enter the coupling gap 50. As a result, the finger unexpectedly falls into the coupling gap 50.

Even if it goes in, you won't be able to get your fingers stuck through the gap.

In addition, the coupling gap 50 is formed so that the windbreak member 40 is attached to the right side plate 33, preventing wind from flowing into the gap, and covering the gap for aesthetic purposes.

In addition, in the present invention, the width of the left plate 31 and the right plate 33 is formed to be the same as the width of the end surfaces of the left door 10 and the right door 20, which are correspondingly attached,

The primary hinge portion (31a) and the secondary hinge portion (32a) are formed on the outside of the end surfaces of the left door (10) and the right door (20) so that the folding door is completely closed; It has been accomplished.

As shown in Figures 1 and 8-9.

The left door 10 of the present invention is rotated and closed on the upper and lower surfaces, respectively, about the hinge axis 11. For this purpose, a separate door coupling part 90 is attached to the vertical surface of the left frame 71. More specifically, the door coupling portion 90, which is formed with an upper hinge coupling hole 90a and a lower hinge coupling hole 90b on the bending plane bent horizontally on the upper and lower sides, is formed on the vertical surface of the left frame 71. It is characterized by being attached.

Here, the hinge axis 11 coupled to the upper surface of the left door 10 penetrates the upper surface hinge coupling hole 90a, is fixedly mounted on the upper frame 60, and the hinge axis 11 coupled to the lower surface. ) is coupled to the lower hinge coupling hole (90b).

The technical feature of the present invention is to provide a door folding system that is easy to assemble and disassemble, and the door system without a separate lower frame on the bottom of the present invention is a door system without a threshold on the bottom because many people enter and exit. It is about,

Because it is very difficult to construct the hinge axis on the bottom of such a door system,

The door coupling part 90 is attached to the vertical surface of the left frame 71 to facilitate disassembly and assembly without construction on the floor, and the upper surface hinge coupling hole of the bending plane is bent horizontally on the upper and lower sides ( 90a) and a lower hinge coupling hole 90b are formed, and are coupled through the corresponding hinge shaft 11. In particular, the lower hinge coupling hole 90b, which is in contact with the floor, is used to connect the corresponding hinge shaft. It is fixedly installed through (11).

Due to this, it has the function of eliminating the need for separate construction for the hinge axis on the floor.

It is in charge.

As described above, although the present invention has been described with limited examples and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following will be understood by those skilled in the art to which the present invention pertains. Of course, various modifications and changes are possible within the scope of equivalence of the patent claims to be described.

10:Left door
11: Hinge axis
20: Right door
30:Joint
31: Left plate
31a: 1st hinge part
32:Middle plate
32a: 2nd hinge part
33:Right plate
40: Windbreak member
50: Joint gap
60: Upper frame
71: Left frame
72:Right frame
80: Damper
90: Door joint
90a: Top hinge coupling hole
90b: Bottom hinge coupling hole
100:Door frame

Claims (5)

A left frame 71 and a right frame 72 are formed on the left and right sides, respectively,
An upper frame 60 is formed at the top, and the bottom does not form a separate frame.
Forms the door frame 100,
In order to provide a folding door system in which the left door 10 and the right door 20 have a relative width of 1:2 inside the door frame 100 to form a mutually coupled two-way folding door,
Forming joints 30 at the upper and lower parts of the left door 10 and the right door 20, respectively;
The left plate 31 of the joint 30 is attached to the right end of the left door 10, the end of the left plate 31 is attached to the primary hinge portion 31a, and the middle plate 32 One end of the middle plate 32 is attached to the primary hinge portion 31a, the other end of the middle plate 32 is attached to the secondary hinge portion 32a, and the right plate 33 is attached to the left end of the right door 20. It is attached to the cross section, and one end of the right plate 33 is attached to the secondary hinge part 32a, so that the primary hinge part 31a and the secondary hinge part 32a allow the two doors to operate as two-way folding doors. It is made to take charge of the hinge function at the time;
When opening in one direction, the left plate 31 and the middle plate 32 attached to the primary hinge portion 31a are opened at a certain angle, and the middle plate 32 attached to the secondary hinge portion 32a and the right plate 33 are formed to maintain contact with each other,
When opening in other directions. The left plate 31 and the middle plate 32 attached to the primary hinge portion 31a maintain contact with each other, and the middle plate 32 and the right plate 33 attached to the secondary hinge portion 32a are They are formed so that they are spaced apart from each other at a certain angle;
A hinge axis (11) is coupled to the upper and lower surfaces of the left end of the left door (10), and the left door (10) is opened and closed by rotating around the hinge axis (11);
A sliding portion 21 is formed on the upper surface of the right door 20 to perform a sliding function in the left and right directions in the inner passage of the upper frame 60, and is opened and closed by folding on the left door 10;
The position at which the sliding part 21 is mounted is spaced at an interval equal to the width of the left door 10 so that the left door 10 and the right door 20 are completely folded and opened with respect to the hinge axis 11. Formed to ensure smooth folding operation; A two-way folding door system that utilizes space without thresholds for short and long doors with a door width of 1:2. According to paragraph 1,
A damper 80 is attached within the passage of the upper frame 60, so that when the right door 20 is closed, the sliding part 21 is caught by the damper 80, so that the door closes gradually rather than suddenly. so that; A two-way folding door system that utilizes space without thresholds for short and long doors with a door width of 1:2. According to claim 1 or 2,
When the left door (10) and right door (20) are completely closed,
The left plate 31, the middle plate 32, and the right plate 33 are all in complete contact with each other, and a coupling gap 50 is formed, and the mutual coupling portion of the left door 10 and the right door 20 The thickness of the left plate 31, the middle plate 32, and the right plate 33 is formed so that the coupling gap 50 formed in the gap is formed so that a finger can loosely enter, so that the finger cannot be caught. In addition, the coupling gap 50 is formed so that the windbreak member 40 is attached to the right side plate 33. A two-way folding door system that utilizes space without thresholds for short and long doors with a door width of 1:2. . According to paragraph 3,
The width of the left plate 31 and the right plate 33 is formed to be the same as the width of the end surfaces of the left door 10 and the right door 20, which are correspondingly attached,
The primary hinge portion (31a) and the secondary hinge portion (32a) are formed on the outside of the end surfaces of the left door (10) and the right door (20) so that the folding door is completely closed; A two-way folding door system that utilizes space without thresholds for short and long doors with a door width of 1:2. According to clause 4,
A door coupling portion 90 having an upper hinge coupling hole 90a and a lower hinge coupling hole 90b formed in a horizontally bent bending plane on the upper and lower sides is attached to the vertical surface of the left frame 71, and the left door The hinge axis 11 coupled to the upper surface of (10) penetrates the upper surface hinge coupling hole 90a and is fixedly mounted on the upper frame 60, and the hinge axis 11 coupled to the lower surface is hinged to the lower surface. It is coupled to the hole (90b),
The left door 10 is rotated to open and close around the hinge axis 11; A two-way folding door system that utilizes space without thresholds for short and long doors with a door width of 1:2.

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