KR101691366B1

KR101691366B1 - Dual directional folding door

Info

Publication number: KR101691366B1
Application number: KR1020160021685A
Authority: KR
Inventors: 송영이
Original assignee: 송영이
Priority date: 2016-02-24
Filing date: 2016-02-24
Publication date: 2016-12-30

Abstract

The present invention relates to a bidirectional folding door. According to the folding door enabling a plurality of doors to be slid along a door frame to be folded to be opened and be expanded to be closed; the present invention comprises: a first door of which one side is fixated to a first fixing unit of the door frame; a second door disposed on a side surface of the first door; a connection member connected to the second door enabling the second door to be slid along the door frame; and a first hinge and a second hinge connecting the first door and the second door having a bidirectional rotation range. The first hinge and the second hinge protrude to be folded in an opposite direction to a pull and push direction of the first door connected through the first hinge and the second hinge when the second door is pulled and pushed. Moreover, the first hinge and the second hinge are spaced at a predetermined distance on one surface where the first door and the second door face each other.

Description

DUAL DIRECTIONAL FOLDING DOOR

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bidirectional folding door, and more particularly, to a bidirectionally folding door capable of opening and closing a plurality of doors connected to each other by a first hinge and a second hinge.

Generally, folding door (folding door) is a folding door that is widely used in a home or workplace because it has better openness than a sliding door or a casement door.

Korean Patent Registration No. 10-1485763 (folding door) proposes a folding door capable of stably supporting a load by providing a sliding door to be supported at a lower portion.

The folding door constructed as described above has a problem that the user can get a lot of force because the folding door opens and closes the folding door while sliding the moving frame in the fixed hinge hinge direction.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a door device for a vehicle, which comprises a first door and a second hinge having a first hinge and a second hinge rotatable in both directions and a guide member for sliding the second door in the guide rail, Directional folding door that can be easily opened and closed while being pushed or pulled by being connected to the upper surface.

According to an aspect of the present invention, there is provided a folding door for folding and opening a plurality of doors while slidably moving a plurality of doors to a door frame, the folding door comprising: a first door having one side fixed to a first fixing part of the door frame; A second door disposed on a side surface of the first door; A connecting member connected by a second door and screwed to the door so as to slide the second door to the door frame, and a connecting member connecting the first door and the second door facing each other, Wherein the first door has a first hinge and a second hinge having opposite rotational directions on both sides of the first hinge and the second hinge, And the first hinge and the second hinge are formed while being spaced apart from each other by a predetermined distance on the opposite surface of the first door and the second door, respectively, and the first hinge and the second hinge are folded while protruding the first hinge and the second hinge in opposite directions, The folded-back folding door can be provided.

The first door may be formed with a first detachment prevention groove on a surface facing the second door, a second detachment prevention groove formed on a surface of the second door facing the first door, One hinge includes a first rotation axis; A first rotation axis insertion rod having a hollow portion for inserting the first rotation axis; A first support plate connected to an outer circumferential surface of the first rotation axis insertion rod; A first body connected to the first support plate; A first body supporting protrusion protruding from both side surfaces of the first body to be fixed to the first departure preventing groove; A second rotation axis insertion rod having a hollow portion such that the first rotation axis is inserted into the first rotation axis insertion rod and then a protruded portion is inserted; A second support plate connected to an outer circumferential surface of the second rotary shaft insertion rod; A second body connected to the second support plate; A second body support protrusion protruding from both sides of the second body so as to be fixed to the second release preventing groove and a second body supporting protrusion fixed to the first body while one side is fixed to the second body while being wound on the first rotation shaft And at least one first restoring spring for causing the first body and the second body to expand 180 degrees about the first rotation axis, the second hinge comprising: a second rotation axis; A third rotation axis insertion rod having a hollow portion for inserting the second rotation axis; A third support plate connected to an outer circumferential surface of the third rotary shaft insertion rod; A third body connected to the third support plate; A third body supporting protrusion protruding from both sides of the third body to be fixed to the first separation preventing groove; A fourth rotation axis insertion rod having a hollow portion such that the second rotation axis is inserted into the third rotation axis insertion rod and then a protruding portion is inserted; A fourth support plate connected to an outer circumferential surface of the fourth rotary shaft insertion rod; A fourth body connected to the fourth support plate; A fourth body supporting protrusion protruding from both sides of the fourth body so as to be fixed to the second detent preventing groove and a second body supporting protrusion fixed to the third body while one side is fixed to the fourth body while being wound on the second rotating shaft And at least one second restoring spring for causing the third body and the fourth body to expand 180 degrees about the second rotation axis.

The first door may be formed with a first detachment prevention groove on a surface facing the second door, a second detachment prevention groove formed on a surface of the second door facing the first door, And a first ventilation protrusion inserted into the first ventilation preventing groove and a second ventilation preventing protrusion inserted into the second ventilation preventing groove so as to close between the first hinge and the second hinge, And a first support protrusion protruding toward both sides of the first ventilation protrusion so as to be fixed to the first ventilation preventing groove, wherein the first ventilation protrusion is provided between the first ventilation protrusion and the second ventilation protrusion Wherein the first ventilation protrusion has a first ventilation protrusion so as to allow the first ventilation protrusion to be fitted on and detached from the first ventilation protrusion so as to increase the sealing force of the ventilation protrusion, , The second ventilation < RTI ID = 0.0 > The protrusion includes a second support protrusion protruding to both sides of the second ventilation protrusion so as to be fixed to the second escape prevention groove, and the second ventilation protrusion is provided with the first ventilation protrusion and the second ventilation protrusion And the second ventilation protrusion includes a second ventilation protrusion so that the second ventilation protrusion can be engaged with and detached from the second ventilation protrusion so as to enhance the sealing force between the first ventilation protrusion and the second ventilation protrusion, . &Lt; / RTI >

In addition, the first fixing portion may include a fixed body that enters and exits the fixed shaft hole of the door frame; A stopper for preventing the fixed body from being detached from the fixed shaft hole; A fixed body spring for transmitting a repulsive force to the fixed body in the direction of the fixed shaft hole, and a bar formed in a bar shape protruding from the fixed body surface.

The bidirectional folding door may include a second fixing part formed on the opposite side of the first fixing part and preventing the first door from being detached from the door frame.

In addition, the second door may be formed to have a longer length than the first door.

The bidirectional folding door further includes an automatic closing portion that automatically closes the second door when the second door is closed only to a predetermined position, and the automatic closing portion includes a housing installed in the door frame; A moving member installed inside the housing and sliding in both directions; A damper fixed on one side of the housing and on the other side for restraining the speed of the moving member; A third restoration spring connected to the housing at one side and connected to the moving member to extend when the door is opened and to transmit restoring force to the moving member when the door is closed and a third restoring spring connected to the door at the side opposite to the damper, And a switch member for moving the door to a closed position by a restoring force of the restoring spring when the door is closed when the door is opened.

Further, the bidirectional folding door may further include a bracket connecting the fastening screw and the second door.

In addition, the bidirectional folding door may further include an auxiliary door frame into which the mining glass is inserted above the door frame.

The bidirectional folding door may further include a fitting frame formed between the door frame and the auxiliary door frame in contact with the mining glass and having a fixing groove corresponding to the thickness of the mining glass.

Further, the door of any one of the first door and the second door may further include an auxiliary glass.

The first door or the second door may include a first chassis fixing the lower portion of the auxiliary glass; A second chassis fixing an upper portion of the auxiliary glass; A third chassis coupled to one end of the first and second chassis and fixing one side of the auxiliary glass and a fourth chassis coupled to the other end of the first and second chassis, Wherein the first chassis includes a first plate having a first screw fastening hole formed on an inner side of a hollow first frame and a second plate having a second screw fastening hole formed in a longitudinal direction And the third chassis is formed with a first screw engagement hole and a second screw engagement hole so that a first engagement screw and a second engagement screw are inserted into the second frame having a hollow rectangular shape for the first chassis and the third chassis engagement, The first and second screw fastening holes are formed on the opposite sides of the first and second screw fastening holes so that the first and second screw fastening holes are formed on the opposite sides of the first and second screw fastening holes, Corresponding to the third and fourth screw bodies A hole can be formed.

The first hinge may include a first rotating column; A second rotating column formed in a shape corresponding to the first rotating column; A first fixing plate in which the first rotating column and the second rotating column are embedded together with the ball bearing; A first rotating column spring fixed to the first fixing plate at one side and a first rotating column spring fixed to the first rotating column at the other side and a second rotating column spring fixed to the first fixing plate at one side and fixed to the second rotating column at the other side Wherein the first and second rotary column springs allow the first door and the second door to unfold 180 degrees about the first fixing plate and the second hinge comprises a third rotary column; A fourth rotating column formed in a shape corresponding to the third rotating column; A second fixed plate in which the third rotating column and the fourth rotating column are embedded together with the ball bearing; A third rotating column spring fixed to the second fixing plate at one side and a third rotating column spring fixed to the third rotating column at the other side, a fourth rotating column spring fixed to the second fixing plate at one side and fixed to the fourth rotating column at the other side And the third rotary column spring and the fourth rotary column spring may cause the first door and the second door to spread 180 degrees around the second fixing plate.

The first hinge may include a first auxiliary spring having one side fixed to the first fixing plate and the other side fixed to the first rotating column, and a second auxiliary spring having one side fixed to the first fixing plate and the other side fixed to the second rotating column And a second auxiliary spring, the second auxiliary spring having one side fixed to the second fixing plate and the other side fixed to the third rotating column, one side fixed to the second fixing plate, and the other side fixed to the second fixing plate, And a fourth auxiliary spring fixed to the fourth rotating column.

The bidirectional folding door may include a first windshield plate attached to an upper surface of the first door to increase a sealing force between the first door and the second door and the door frame, A third wind board attached to an upper surface of the second door, and a fourth wind board attached to a lower surface of the second door.

In addition, the bidirectional folding door may further include a locking member for fixing the first door to the door frame so that the connecting member can be opened and closed only by the second door when the connecting member is separated from the second door.

The bidirectional folding door according to the embodiment of the present invention can easily open and close the folding door while pushing or pulling.

Further, the bi-directional folding door according to the embodiment of the present invention has the effect of automatically closing a predetermined distance by the automatic closing portion.

Further, the bidirectional folding door according to the embodiment of the present invention has a good opening feeling when folded by the first hinge, the second hinge and the bracket.

1 is a front view of a bi-directional folding door according to a first embodiment of the present invention;
Fig. 2 and Fig. 3 are views showing schematically a state in which the bidirectional folding door shown in Fig. 1 is opened and closed in both directions; Fig.
FIG. 4 is a perspective view schematically showing the first hinge shown in FIG. 1; FIG.
Fig. 5 is a perspective view schematically showing the first ventilation protrusion and the second ventilation protrusion shown in Fig. 1. Fig.
6 is a perspective view schematically showing the first fixing part shown in Fig. 2; Fig.
7 is a perspective view schematically showing the second fixing part shown in Fig.
Figs. 8 and 9 are perspective views showing the automatic closing portion shown in Fig. 2; Fig.
10 is a perspective view showing the auxiliary door frame and the fitting frame shown in FIG. 2;
11 is a perspective view of a bi-directional folding door according to a second embodiment of the present invention;
12 is a perspective view of a bidirectional folding door according to a third embodiment of the present invention;
13 is a perspective view schematically showing the first hinge and the second hinge shown in Fig. 12; Fig.
Fig. 14 is an exemplary view schematically showing opening and closing of a bi-directional folding door by the locking member shown in Fig. 12; Fig.

Hereinafter, the description of the present invention with reference to the drawings is not limited to a specific embodiment, and various transformations can be applied and various embodiments can be made. It is to be understood that the following description covers all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In the following description, the terms first, second, and the like are used to describe various components and are not limited to their own meaning, and are used only for the purpose of distinguishing one component from another component.

Like reference numerals used throughout the specification denote like elements.

As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It is also to be understood that the terms " comprising, "" comprising, "or" having ", and the like are intended to designate the presence of stated features, integers, And should not be construed to preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

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

FIG. 1 is a front view of a bidirectional folding door according to a first embodiment of the present invention, and FIGS. 2 and 3 are views showing schematically a state in which the bidirectionally folding door shown in FIG. 1 is opened and closed in both directions.

Referring to FIGS. 1 to 3, the bidirectional folding door 10 can fold the first door 100 and the second door 200 while sliding the door 100 to the door frame 20, thereby opening and opening the door 100. The bidirectional folding door 10 can open and close the first door 100 and the second door 200 while pushing or pulling the knob 220 as shown in FIGS.

The bidirectional folding door 10 includes a door frame 20, an auxiliary door frame 30, a mining glass 50, a first door 100, a second door 200, a first fixing part 300, The first hinge 500a, the second hinge 500b, the automatic closing portion 600, the connecting member 700, the bracket 800, the first ventilation protrusions 900a, A protrusion projection 900b and a handle 220. [

The door frame 20 includes a first door 100 and a second door 200 coupled to the first fixing part 300, the second fixing part 400 and the connecting member 700, to be. The door frame 20 can be formed into a square frame shape that can be assembled. The door frame 20 may include a guide rail hole 22 through which a latching bar 710 of a connecting member 700 to be described later can slide.

The first door 100 can be rotated in both directions while being fixed to the door frame 20 by the first and second fixing parts 300 and 400. The first door 100 may be formed with shock-resistant rubber (not shown) on both sides of the second door 200 to reduce impact when the second door 200 contacts the second door 200.

One side of the second door 200 may be connected to the first door 100 through the first hinge 500a and the second hinge 500b and the upper side may be connected to the connecting member 700. The second door 200 includes a first door 100 connected to the first hinge 500a and the second hinge 500b when the handle 220 is pushed or pulled, And the first hinge 500a and the second hinge 500b protrude in a direction opposite to the direction of pushing or pulling. The second door 200 is longer than the first door 100 and the bracket 800 is mounted at a midway point of the first door 100 so that the second door 200 and the first door 100 are folded It can have a high level of openness.

The handle 220 may be formed on both sides of the second door 200.

The first fixing part 300 and the second fixing part 400 can fix the first door 100 to the door frame 20. [ The first fixing part 300 and the second fixing part 400 will be described in detail with reference to FIGS. 6 and 7. FIG.

The first hinge 500a and the second hinge 500b are connected to the first door 100 and the second door 200 so that the first door 100 and the second door 200 can be folded in both directions Let's do it. The first hinge 500a and the second hinge 500b will be described in detail with reference to FIG.

The connecting member 700 is connected to the second door 200 so that the second door 200 can slide on the door frame 20. The connecting member 700 may be mounted with wheels 730 having bearings on both sides thereof. The connecting member 700 can be slid by the rotation of the wheel 730 which is seated on the wheel guide rail 24 from the inside of the door frame 20, as shown in Fig. 8 and 9, the connecting member 700 is inserted into the latching barhole 641 of the switch member 640 by a latching bar 710 whose upper side is to be described later, To the upper surface of the second door (200).

As shown in FIGS. 8 and 9, the second door 200 includes a bracket 800 capable of withstanding the load of the second door 200 mounted on the upper surface of the second door 200, and a bracket 800 May be more preferably connected to the fastening screw 720.

Further, the bracket 800 may be attached to or detached from the second door 200 by a screw, or may be detached and attached by a one-touch button.

The automatic closing portion 600 can automatically close the second door 200 when the second door 200 is closed to a predetermined position. The automatic closing portion 600 will be described in detail with reference to FIGS. 8 and 9. FIG.

4 is a perspective view schematically showing the first hinge shown in Fig.

4, the first hinge 500a and the second hinge 500b are formed on the upper side and the lower side of the first door 100 and the second door 200, respectively, The door 200 can be connected. The first hinge 500a and the second hinge 500b may be separated by a predetermined distance.

Here, the second hinge 500b is different in position from the first hinge 500a, and the structure and operation method are the same. Here, the second hinge 500b is omitted, and only the first hinge 500a is explained .

The first hinge 500a may be attached to and detached from the first surface of the first door 100 and the second door 200, or may be integrally formed. The first hinge 500a includes a first body 510a, a second body 520a, a first rotation shaft 530a, a first rotation axis insertion rod 512a, a second rotation axis insertion rod 522a, 523, a first support plate 513, a first body support protrusion 511a, a second body support protrusion 521a, and a first restoration spring 540a.

The first rotating shaft 530a may be formed in a cylindrical shape. The first rotation axis 530a may be inserted into the first rotation axis insertion rod 512a and the second rotation axis insertion rod 522a.

The first rotation axis insertion rod 512a may be formed with a hollow portion such that the first rotation axis 530a is inserted. The first rotation axis insertion rod 512a may be formed in a cylindrical shape.

One side of the first support plate 513 may be connected to the outer circumferential surface of the first rotation axis insertion rod 512a and the other side thereof may be connected to the first body 510a. The first support plate 513 may have a predetermined length.

The first body 510a may be formed in a semicircular shape along the surface of the first support plate 513.

The first body supporting protrusions 511a protrude from both sides of the first body 510a in the direction of the first guide protrusion 121.

Here, the first guide protrusion 121 is a protrusion in which a plurality of 'A' shaped protrusions protrude in the second door direction so that the first detachment prevention groove 120 is formed on one surface of the first door 100.

The second guide protrusion 211 may have a shape corresponding to that of the first guide protrusion 121 so that the second release preventing groove 210 is formed on one surface of the second door 200.

The first body supporting protrusions 511a may protrude in a plate shape along both sides of the first body 510a.

The second rotation axis insertion bar 522a may be formed with a hollow portion such that the first rotation axis 530a is inserted. The second rotation axis insertion bar 522a may be formed in a cylindrical shape.

One end of the second support plate 523 may be connected to the outer circumferential surface of the second rotation axis insertion rod 522a, and the other end thereof may be connected to the second body 520a. The second support plate 523 may have a plate shape having a predetermined length.

The second body 520a may be formed in a semi-circular shape along the surface of the second support plate 523.

The second body supporting protrusions 521a are protrusions protruding in the direction of the second guide protrusion 211, which will be described later, on both sides of the second body 520a. The second body supporting protrusions 521a may protrude in a plate shape along both sides of the second body 520a.

The first restoring spring 540a may be formed in a shape in which two coils are wound. The first restoring spring 540a may be fixed to the first body 510a while the other end thereof is fixed to the second body 520a while being wound around the first rotating shaft 530a. The first restoring spring 540a may cause the first body 510a and the second body 520a to be extended 180 degrees around the first rotation shaft 530a.

5 is a perspective view schematically showing the first ventilation protrusion and the second ventilation protrusion shown in Fig.

5, the first ventilation protrusion 900a and the second ventilation protrusion 900b are provided between the first door 100 and the second door 200 or between the first hinge 500a and the second hinge 500b And 500b.

The second ventilation protrusions 900b differ from the first ventilation protrusions 900a in position and have the same structure so that redundant description of the second ventilation protrusions 900b is omitted and the first ventilation protrusions 900a ) Will be described below.

The first ventilation protrusion 900a may be formed in a semicircular shape along the side surface of the first door 100. [

Here, the semicircular shape is formed by a predetermined interval or contact in the rotational direction when the first door 100 and the second door 200 are rotated in one direction or the other direction by the first hinge 500a and the second hinge 500b, The airtightness can be maintained.

The first ventilation protrusion 900a may be made of rubber, plastic, sponge, or the like. The first ventilation protrusion 900a is provided with first support protrusions 910a protruding in the direction of the first guide protrusion 121 on both sides of the first ventilation protrusion 900a so as to be fixed to the first guide protrusion 121 .

The first support protrusion 910a allows the first ventilation protrusion 900a to be inserted into the first escape prevention groove 120 while being slid.

The first ventilation protrusion 900a may include a first ventilation protrusion 930a formed in a plurality of hairy strips to enhance airtightness between the first ventilation protrusion 900a and the second ventilation protrusion 900b have.

The first human foot 930a contacts the second human eye 930b formed on the second ventilation protrusion 900b and blocks the gap between the first ventilation protrusion 900a and the second ventilation protrusion 900b .

The first ventilation protrusion 900a may include a first ventilation insertion slot 920a so that the first ventilation protrusion 930a is fitted to and detached from the first ventilation protrusion 900a.

The first prosthesis insertion groove 920a is a groove that is formed along the outer peripheral surface of the first ventilation protrusion 900a.

6 is a perspective view schematically showing the first fixing part shown in Fig.

Referring to FIG. 6, the first fixing part 300 may fix the door frame 20 and the first door 100. The first fixing part 300 may include a fixing body 310, a stopper 320, a fixing body spring 330, and a lifting bar 340.

The fixed body 310 is a body of the first fixing part 300 formed in a cylindrical shape. One side of the fixed body 310 can be inserted into the fixed shaft hole 21 of the door frame 20. The fixed body 310 may have a predetermined thickness and length to be inserted into the fixed body insertion groove 110 formed in the first door 100.

The stopper 320 can prevent the fixing body 310 from being detached in the downward direction of the fixed shaft hole 21. [ The stopper 320 may be formed to protrude along the surface of the fixed body 310.

The fixed body spring 330 has one side connected to one end of the fixing body 310 and the other side contacting with the inner side surface of the door frame 20 so that the repulsive force pushing the fixing body 310 toward the first door 100 .

The lift bar 340 may protrude from the fixed body 310 in a bar shape. The lifting bar 340 acts on the bar so that the fastening body 310 can be lifted in the direction of the fastening body spring 330.

7 is a perspective view schematically showing the second fixing part shown in Fig.

7, one side of the second fixing part 400 may be connected to the first door 100, and the other side thereof may be fixed to the door frame 20. Referring to FIG. The second fixing part 400 may include a fixed shaft 410 and a secondary shaft 420.

The fixed shaft 410 is formed in a cylindrical shape in a direction symmetrical to the first fixing part 300 so that the first door 100 can be prevented from being detached from the door frame 20. The fixed shaft 410 may be connected to the auxiliary shaft 420 by a screw fastening method. The fixed shaft 410 may include a height adjusting groove 440 to which a wrench can be connected to the outer circumferential surface.

The height adjustment groove 440 can adjust the distance between the first door 100 and the door frame 20 while rotating the fixed shaft 410 in both directions.

The fixing ring groove 450 may be formed on one surface of the auxiliary shaft 420 so that the auxiliary shaft 420 does not rotate when the fixing shaft 410 is rotated by the spanner.

The auxiliary shaft 420 allows the fixing shaft 410 to rotate by a bearing 430 formed at a lower portion thereof.

Figs. 8 and 9 are perspective views showing the automatic closing portion shown in Fig. 2. Fig.

8 and 9, the automatic closing portion 600 is connected to the upper surface of the door frame 20 and the second door 200 so that the door is automatically pulled when the second door 200 is closed to a predetermined position So that it can be closed. The automatic closing portion 600 may include a housing 610, a moving member 620, a damper 630, a switch member 640, and a third restoring spring 650.

The housing 610 is the body of the automatic closing portion 600. The housing 610 may be formed in a bar shape having a space therein. The housing 610 may be fixed to a groove formed on the upper portion of the door frame 20, as shown in FIG. The housing 610 may be formed with an induction hole 611 through which the latching bar 710 of the connecting member 700 is guided.

The moving member 620 may be installed in the housing 610 in a manner that a sliding protrusion (not shown) and a sliding groove (not shown) are fastened and slid in both directions. The movable member 620 may have a groove corresponding to the damper 630 so that the damper 630 can be seated.

One side of the damper 630 is fixed to the housing 610 and the other side is seated on the moving member 620 to adjust the sliding speed of the moving member 620. The damper 630 may be of a gas type, an air type or a hydraulic type.

The switch member 640 is bent when the second door 200 is opened and can be moved to the closed position while the second door 200 is closed when the second door 200 is closed. The switch member 640 may be installed on the movable member 620 in the opposite direction to the damper 630. The switch member 640 may have a guide groove (not shown) which can be fixed to the protrusion 612 formed on the inner surface of the housing 610 on one side.

Here, the guide groove (not shown) may be formed at a predetermined angle and depth so that the switch member 640 can be fixed to the protrusion 612 while being bent at a predetermined angle.

The switch member 640 may be formed with a semicircular latching hole 641 through which the latching bar 710 can be inserted.

The third restoration spring 650 may extend when the second door 200 is opened and transmit the restoring force to the shifting member 620 when the second door 200 is closed. The third restoration spring 650 may be connected to the housing 610 at one side and to the moving member 620 at the other side.

FIG. 10 is a perspective view showing the auxiliary door frame and the fitting frame shown in FIG. 2. FIG.

Referring to FIG. 10, the auxiliary door frame 30 is formed in the upper direction of the door frame 20, and can be fixed to the mining glass 50. The auxiliary door frame 30 may be formed in a 'C' shape having one side opened.

The fitting frame 40 can increase the sealing force between the door frame 20 and the auxiliary door frame 30 in contact with the mining glass 50. The fitting frame 40 may be formed with a fixing groove 41 corresponding to the thickness of the mining glass 50.

11 is a perspective view of a bi-directional folding door according to a second embodiment of the present invention.

The bi-directional folding door according to the second embodiment of the present invention shown in Fig. 11 is different from the bi-directional folding door of Fig. 1 in that an auxiliary glass is added to the first door or the second door shown in Fig. 1, Includes the same components except that the one door or the second door is configured as a chassis. Therefore, the same reference numerals are given to the same constituent elements, and redundant description of the same constituent elements will be omitted, and the added constituent elements will be mainly described.

Referring to FIG. 11, the door of any one of the first door 100 and the second door 200 may further include an auxiliary glass 6000. The door of any one of the first door 100 and the second door 200 includes a first chassis 2000, a second chassis (not shown), a third chassis 3000 and a fourth chassis And can be assembled while fixing the chassis (not shown) with the engagement screws. The door of either the first door 100 or the second door 200 includes a first chassis 2000, a second chassis (not shown), a third chassis 3000, and a fourth chassis (not shown) can do.

The first chassis 2000 can fix the lower portion of the auxiliary glass 6000. The first chassis 2000 includes a first frame 2100, a first fixing protrusion 2110, a first plate 2120, a second plate 2130, a first screw connection hole 2140, Lt; RTI ID = 0.0 > 2150 < / RTI >

The first frame 2100 is the body of the first chassis 2000. The first frame 2100 may be formed into a hollow bar shape. The first frame 2100 may have a rectangular shape. The first frame 2100 may be formed in the transverse direction of the auxiliary glass 6000.

The first fixing protrusions 2110 are a plurality of protrusions formed on one side of the first frame 2100 and extending in the direction of the auxiliary glass 6000 to fix both sides of the auxiliary glass 6000.

The first plate 2120 may be formed in the longitudinal direction of the first chassis 2000 on the inner side of the first frame 2100. The first plate 2120 may have a predetermined thickness to increase the durability of the first chassis 2000.

The second plate 2130 may be spaced apart from the first plate 2120 by a predetermined distance on the inner side of the first frame 2100. The second plate 2130 may be positioned between the first plate 2120 and the first fixing protrusion 2110.

The first screw coupling hole 2140 may be formed in a groove shape in which the first coupling screw 4000 can be coupled to both ends of the first plate 2120. The first screw tightening hole 2140 can be engaged with the first engaging screw 4000.

The second screw coupling hole 2150 may be formed in a groove shape in which coupling screws can be coupled to both ends of the second plate 2130. And the second screw tightening hole 2150 can be engaged with the second engaging screw 5000.

The second chassis (not shown) can fix the upper portion of the auxiliary glass 6000. A second chassis (not shown) may be formed on the opposite side of the first chassis 2000. Since the second chassis (not shown) is formed in a structure and a shape corresponding to the first chassis 2000, a duplicate description will be omitted.

The third chassis 3000 is coupled to one end of the first chassis 2000 and the second chassis (not shown), and can fix one side of the auxiliary glass 6000. The third chassis 3000 may include a second frame 3100, a second fixing protrusion 3110, a third screw coupling hole 3130, and a fourth screw coupling hole 3140.

The second frame 3100 is the body of the third chassis 3000. The second frame 3100 may be formed into a hollow bar shape. The second frame 3100 may have a rectangular shape. The second frame 3100 may be formed in the longitudinal direction of the auxiliary glass 6000. The second frame 3100 has a first screw connection hole 2140 so that the first engagement screw 4000 and the second engagement screw 5000 are inserted into the third screw connection hole 3130 and the fourth screw connection hole 3140. [ And an engagement screw insertion groove 3150 having an area corresponding to the second screw fastening hole 2150 may be formed.

Here, the coupling screw insertion groove 3150 is formed such that the first engagement screw 4000 and the second engagement screw 5000 are easily inserted into the third screw engagement hole 3130 and the fourth screw engagement hole 3140, The first screw 4000 and the second screw 5000 may be inserted into the open side of the third chassis 3000 so that the third screw tightening hole 3130 and the fourth screw It may be inserted into the fastening hole 3140, so that the fastening hole 3150 may not be formed.

The second fixing protrusion 3110 is a plurality of protrusions formed and extended in the direction of the auxiliary glass 6000 so as to fix both sides of the auxiliary glass 6000 on one side of the second frame 3100.

The third screw connection hole 3130 is a hole formed in the fixing plate 3120. The third screw fixing hole 3130 can be engaged with the first engaging screw 4000. The third screw connection hole 3130 may be formed at a position corresponding to the first screw connection hole 2140 formed in the first frame 2100.

The fourth screw fastening hole 3140 is a hole formed in the fastening plate 3120 so as to be spaced apart from the third screw fastening hole 3130 by a predetermined distance. And the fourth screw tightening hole 3140 can be engaged with the second engaging screw 5000. The fourth screw coupling hole 3140 may be formed at a position corresponding to the second screw coupling hole 2150.

The fourth chassis (not shown) is coupled to the other end of the first chassis 2000 and the second chassis (not shown), and can fix the other side of the auxiliary glass 6000. A fourth chassis (not shown) may be formed on the opposite side of the third chassis 3000. The fourth chassis (not shown) is formed in a structure and a shape corresponding to that of the third chassis 3000, and thus a duplicate description will be omitted.

FIG. 12 is a perspective view of a bidirectional folding door according to a third embodiment of the present invention, FIG. 13 is a perspective view schematically showing the first hinge and the second hinge shown in FIG. 12, Fig. 8 is an exemplary view schematically showing opening and closing of a bi-directional folding door by a locking member.

The bi-directional folding door according to the third embodiment of the present invention shown in Figs. 12 to 14 has the structure and position of the first hinge and the second hinge shown in Figs. 1 and 2, And includes the same components except that a first windshield plate, a second windshield plate, a third windshield plate, a fourth windshield plate, and a lock member are added. Therefore, the same reference numerals are given to the same constituent elements, and redundant description of the same constituent elements will be omitted, and the added constituent elements will be mainly described.

12 to 14, the bidirectional folding door according to the third embodiment includes a first hinge 7000a, a second hinge 7000b, a first windshield 8000a, a second windshield 8000b, 3 windshield plate 8000c, a fourth windshield plate 8000d, and a lock member 9000. [

The first hinge 7000a is connected to the first door 100 and the second door 200 so that the first door 100 and the second door 200 can be folded in both directions. The first hinge 7000a includes a first rotating column 7100a, a second rotating column 7200a, a first ball bearing 7400a, a first fixing plate 7300a, a first rotating column spring 7500a, A second rotating column spring 7700a, and a second auxiliary spring 7800a.

The first rotating column 7100a may be formed in a columnar shape. The first pillar 7100a may be embedded in the first pillar insertion groove 130a formed on the upper surface of the first door 100. The other side of the first rotating column 7100a may have a larger diameter than the other side of the cylindrical shape. The first rotating column 7100a includes a first screw groove 7110a so as to be fastened to a screw S passing through a first screw insertion groove 140 formed on one side of the first door 100 .

The second rotating column 7200a may be formed in a columnar shape. The second pillar 7200a may be embedded in the third pillar insertion groove 230a formed on the upper surface of the second door 200 in the shape of a cylinder. The other side of the second pillar 7200a may have a larger diameter than the other side of the cylindrical shape. The second pillar 7200a includes a second screw groove 7210a so as to be fastened to the screw S passing through the second screw insertion groove 240 formed on one side of the second door 200 .

The first ball bearing 7400a is disposed between the first fixing plate 7300a and the first rotating column 7100a and the second rotating column 7200a while being in contact with the first fixing plate 7300a contacting the first rotating column 7100a and the second rotating column 7200a, And the first fixed plate 7300a.

The first fixing plate 7300a can fix the first rotating column 7100a and the second rotating column 7200a while retaining the first rotating column 7100a and the second rotating column 7200a. The first fixing plate 7300a may be formed in a plate shape. Both side surfaces of the first fixing plate 7300a may be formed in a semicircular shape.

The first rotating column spring 7500a may be fixed to the first rotating column 7100a while one side is fixed to the first fixing plate 7300a and the other side is wound on the first rotating column 7100a in one direction.

The first auxiliary spring 7600a may be fixed to the first rotating column 7100a while one side is fixed to the first fixing plate 7300a and the other side is wound on the first rotating column 7100a in one direction.

The second rotating column spring 7700a may be fixed to the second rotating column 7200a while one side is fixed to the first fixing plate 7300a and the other side is wound on the second rotating column 7200a in one direction.

The second auxiliary spring 7800a may be fixed to the second rotating column 7200a while one side is fixed to the first fixing plate 7300a and the other side is wound to the second rotating column 7200a in one direction.

Here, the first rotary column spring 7500a, the first auxiliary spring 7600a, the second rotary column spring 7700a, and the second auxiliary spring 7800a are fixed by the restoring force of the spring to the first and second doors 100, The first fixing plate 7300a may be extended 180 degrees around the first fixing plate 7300a.

The first rotary column spring 7500a and the first auxiliary spring 7600a and the second rotary spring 7700a and the second auxiliary spring 7800a are connected to the first rotary column 7100a and the second rotary column 7200a ), There is an effect that even if any one of them is cut off, it can be replaced.

The second hinge 7000b is different in position from the first hinge 7000a, and the structure thereof is the same, so a duplicate description will be omitted.

The first windshield plate 8000a can prevent the wind that flows into the space between the first door 100 and the door frame 20. [ The first windshield 8000a may be attached to the upper surface of the first door 100. [ The first windshield 8000a may be formed to fit the length of the upper surface of the first door 100. [ The first windshield plate 8000a may be formed in a stepped shape at one side contacting the first hinge 7000a.

Here, the step shape may be formed such that the height of the upper surface of the first windshield 8000a and the upper surface of the first hinge 7000a when the first hinge 7000a contacts the first hinge 7000a.

The first windshield plate 8000a may include a hole H1 through which the first rotating column 7100a can pass. The first wind shield plate 8000a may include a hole H2 through which the first fixing bar 9100 can pass. The first windshield plate 8000a may include a through hole H3 so that the fixing body 310 can pass through.

The second windshield 8000b may be attached to the lower surface of the first door 100. [ The second windshield 8000b may be formed as a lower surface of the first door 100. The second wind shield plate 8000b may be formed in a shape corresponding to the first wind shield plate 8000a. The second wind shield plate 8000b may include a hole (not shown) through which the second fixing rod 9200 can pass. The second wind shield plate 8000b may include holes (not shown) at positions symmetrical with the holes H1 so that the third rotating column (not shown) of the second hinge 7000b can penetrate. The second wind shield plate 8000b may include a hole (not shown) so that the fixed shaft 410 can penetrate.

The third windshield 8000c may be attached to the upper surface of the second door 200. [ The third windshield 8000c may be formed to have an upper surface length of the second door 200. [ The third wind shield plate 8000c may include a hole H4 so that the bracket 800 can be penetrated. The third wind shield plate 8000c may include a hole (not shown) through which the second rotating column 7200a can pass. The third windshield 8000c may be formed in a stepped shape on one side contacting the first hinge 7000a.

The fourth wind shield plate 8000d may be attached to the lower surface of the second door 200. [ The fourth windshield 8000d may be formed to have a length of the lower surface of the second door 200. The fourth wind shield plate 8000d may include a hole (not shown) so that a fourth rotary column (not shown) of the second hinge 7000b can be penetrated.

The locking member 9000 may be embedded in the first door 100. [ The locking member 9000 is formed on the door frame 20 so that the connecting member 700 can be opened and closed only by the second door 200 when the connecting member 700 is separated from the second door 200, And can be fixed to the locking member insertion groove 23. The locking member 9000 may include a first fixing bar 9100, a second fixing bar 9200, and a turning handle 9300.

The first fixing bar 9100 can be extended on the upper surface of the first door 100. The first fixing bar 9100 can be inserted into the locking member insertion groove 23 formed in the door frame 20. The first fixed bar 9100 may be formed with a rack on one side so as to be connected to the turn handle 9300 in a rack and pinion manner.

The second fixing bar 9200 may be extended on the upper surface of the second door 200. The second fixing rod 9200 may be embedded in the locking member insertion groove 23 formed in the door frame 20. The second fixed bar 9200 may be formed with a rack on one side so as to be connected to the turn handle 9300 in a rack and pinion manner.

The turning handle 9300 may be formed to protrude from one side of the first door 100 on one side. The turning handle 9300 may be connected to the outer periphery of the pinion protruding in a sawtooth shape so that the other side thereof is connected to the racks of the first fixing rod 9100 and the second fixing rod 9200. The turning handle 9300 may move the first fixing bar 9100 and the second fixing bar 9200 in one direction or the other direction when the turning handle 9300 rotates in one direction or the other direction.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be clear to the person.

10: Bidirectional folding door
20: door frame
21: Fixed shaft hole
22: Guide rail hole
23: Locking member insertion groove
24: wheel guide rail
30: Auxiliary door frame
40: Fitting frame
41: Fixing groove
50: mining glass
100: first door
110: Fixing body insertion groove
120: first departure prevention groove
121: first guide projection
130a: first rotating column insertion groove
140: first screw insertion groove
200: Second door
210: second departure prevention groove
211: second guide projection
220: Handle
230a: third rotating column insertion groove
240: second screw insertion groove
300: first fixing part
310: Fixing body
320: Stopper
330: Fixing body spring
340: Olimba
400: second fixing portion
410: fixed shaft
420: Auxiliary axis
430: Bearings
440: height adjustment groove
450: Retaining ring groove
500a: first hinge
510a: first body
511a: first body supporting projection
512a: first rotating shaft insertion rod
513: first support plate
520a: second body
521a: second body supporting projection
522a: a second rotary shaft insertion rod
523: second support plate
530a:
540a: first restoration spring
500b: second hinge
600: automatic closing portion
610: Housing
611: Induction Hall
612: projection
620: moving member
630: Damper
640:
641:
650: third restoration spring
700: connecting member
710: Hanging bar
720: Clamping screw
730: Wheels
800: Bracket
900a: first ventilation protrusion
910a: first support projection
920a: first humanoid insert groove
930a: First human hair
900b: second ventilation protrusion
930b: second human figure
2000: First chassis
2100: 1st frame
2110: first fixing projection
2120: first plate
2130: second plate
2140: first screw tightening hole
2150: Second screw tightening hole
3000: Third Chassis
3100: Second frame
3110: second fixing projection
3120: Fixing plate
3130: third screw tightening hole
3140: Fourth screw tightening hole
3150: Coupling screw insertion groove
4000: first coupling screw
5000: Second coupling screw
6000: Auxiliary glass
7000a: first hinge
7100a: 1st pillar
7110a: first screw groove
7200a: 2nd pillar
7210a: second screw groove
7300a: first fixing plate
7400a: first ball bearing
7500a: first rotating column spring
7600a: first auxiliary spring
7700a: second rotating column spring
7800a: Second auxiliary spring
7000b: second hinge
8000a: first windshield plate
8000b: second windshield plate
8000c: third windshield plate
8000d: fourth windshield plate
9000: Lock member
9100: first fixing rod
9200: Second fixing rod
9300: Turn handle

Claims

A folding door for folding and opening a plurality of doors while slidably moving the door to a door frame,
A first door having one side fixed to a first fixing part of the door frame;
A second door disposed on a side surface of the first door;
A connecting member connected to the second door by a screw and detachable from the second door and slidably moving the second door to the door frame,
And a first hinge and a second hinge which connect opposite sides of the first door and the second door and have rotation ranges of both directions on opposite sides of the opposite side,
The second door is folded while the first hinge and the second hinge protrude in a direction opposite to the direction of pushing or pulling the first door connected by the first hinge and the second hinge when the second door is pushed or pulled,
Wherein the first hinge and the second hinge are formed while being spaced apart from each other by a predetermined distance on a surface of the first door and the second door facing each other,
The first door has a first detachment prevention groove formed on a surface thereof facing the second door,
The second door has a second release preventing groove formed on a surface thereof facing the first door,
The first hinge
A first rotating shaft;
A first rotation axis insertion rod having a hollow portion for inserting the first rotation axis;
A first support plate connected to an outer circumferential surface of the first rotation axis insertion rod;
A first body connected to the first support plate;
A first body supporting protrusion protruding from both side surfaces of the first body to be fixed to the first departure preventing groove;
A second rotation axis insertion rod having a hollow portion such that the first rotation axis is inserted into the first rotation axis insertion rod and then a protruded portion is inserted;
A second support plate connected to an outer circumferential surface of the second rotary shaft insertion rod;
A second body connected to the second support plate;
A second body supporting protrusion protruding from both sides of the second body so as to be fixed to the second separation preventing groove,
Wherein at least one of the first and second bodies is fixed to the first body while the other body is fixed to the second body while the first body and the second body are wound around the first rotation axis, A first restoration spring,
The second hinge
A second rotating shaft;
A third rotation axis insertion rod having a hollow portion for inserting the second rotation axis;
A third support plate connected to an outer circumferential surface of the third rotary shaft insertion rod;
A third body connected to the third support plate;
A third body supporting protrusion protruding from both sides of the third body to be fixed to the first separation preventing groove;
A fourth rotation axis insertion rod having a hollow portion such that the second rotation axis is inserted into the third rotation axis insertion rod and then a protruding portion is inserted;
A fourth support plate connected to an outer circumferential surface of the fourth rotary shaft insertion rod;
A fourth body connected to the fourth support plate;
A fourth body supporting protrusion protruding from both sides of the fourth body so as to be fixed to the second separation preventing groove;
At least one of which is fixed to the third body while the other is fixed to the fourth body while the third body and the fourth body are extended 180 degrees about the second rotation axis while being wound on the second rotation axis, A bi-directional folding door comprising a second restoring spring.

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A folding door for folding and opening a plurality of doors while slidably moving the door to a door frame,
A first door having one side fixed to a first fixing part of the door frame;
A second door disposed on a side surface of the first door;
A connecting member connected to the second door by a screw and detachable from the second door and slidably moving the second door to the door frame,
And a first hinge and a second hinge which connect opposite sides of the first door and the second door and have rotation ranges of both directions on opposite sides of the opposite side,
The second door is folded while the first hinge and the second hinge protrude in a direction opposite to the direction of pushing or pulling the first door connected by the first hinge and the second hinge when the second door is pushed or pulled,
Wherein the first hinge and the second hinge are formed while being spaced apart from each other by a predetermined distance on a surface of the first door and the second door facing each other,
The first door has a first detachment prevention groove formed on a surface thereof facing the second door,
The second door has a second release preventing groove formed on a surface thereof facing the first door,
A first ventilation protrusion inserted into the first ventilation preventing groove and a second ventilation preventing protrusion inserted into the second ventilation preventing groove to seal the first hinge and the second hinge,
The first ventilation protrusion includes a first support protrusion protruding to both sides of the first ventilation protrusion so as to be fixed to the first ventilation protrusion,
The first ventilation protrusion includes a first ventilation protrusion formed in a plurality of hair-like strips to increase a sealing force between the first ventilation protrusion and the second ventilation protrusion,
The first ventilation protrusion includes a first ventilation protrusion groove for allowing the first ventilation protrusion to be fitted on and detached from the first ventilation protrusion,
And the second ventilation protrusion includes a second support protrusion protruding to both sides of the second ventilation protrusion so as to be fixed to the second escape prevention groove,
The second ventilation protrusion includes a second ventilation protrusion formed in a plurality of hair-like strips to increase a sealing force between the first ventilation protrusion and the second ventilation protrusion,
And the second ventilation protrusion includes a second human eye insertion slot so that the second human eye is adhered to and detached from the second ventilation protrusion.

The method according to claim 1 or 3,
The first fixing portion
A fixed body which is inserted into and withdrawn from the fixed shaft hole of the door frame;
A stopper protruding along the surface of the fixed body, the stopper preventing the fixed body from being detached from the fixed shaft hole;
A stationary body spring having one end connected to one end of the fixed body and the other end contacting an inner surface of the door frame and transmitting a repulsive force to the fixed body in the direction of the fixed shaft hole;
And a lift bar formed in a bar shape protruding from the fixed body surface.

The method according to claim 1 or 3,
The first fixing portion
A fixed body which is inserted into and withdrawn from the fixed shaft hole of the door frame;
A stopper protruding along the surface of the fixed body, the stopper preventing the fixed body from being detached from the fixed shaft hole;
A stationary body spring having one end connected to one end of the fixed body and the other end contacting an inner surface of the door frame and transmitting a repulsive force to the fixed body in the direction of the fixed shaft hole;
And an elevating bar formed in a bar shape protruding from the surface of the fixed body,
And a second fixing portion formed on an opposite side of the first fixing portion to prevent the first door from being detached from the door frame.

The method according to claim 1 or 3,
Wherein the second door is formed to have a longer width than the first door.

A folding door for folding and opening a plurality of doors while slidably moving the door to a door frame,
A first door having one side fixed to a first fixing part of the door frame;
A second door disposed on a side surface of the first door;
A connecting member connected to the second door by a screw and detachable from the second door and slidably moving the second door to the door frame,
And a first hinge and a second hinge which connect opposite sides of the first door and the second door and have rotation ranges of both directions on opposite sides of the opposite side,
The second door is folded while the first hinge and the second hinge protrude in a direction opposite to the direction of pushing or pulling the first door connected by the first hinge and the second hinge when the second door is pushed or pulled,
Wherein the first hinge and the second hinge are formed while being spaced apart from each other by a predetermined distance on a surface of the first door and the second door facing each other,
Further comprising an automatic closing portion that automatically closes the second door when the second door is closed only to a predetermined position,
Wherein the automatic closing portion comprises:
A housing installed in the door frame;
A moving member installed inside the housing and sliding in both directions;
A damper fixed on one side of the housing and on the other side for restraining the speed of the moving member;
A third restoring spring connected to the housing on one side and connected to the moving member on the other side to extend the door when the door is opened and transmit the restoring force to the moving member when the door is closed,
And a switch member installed on the movable member on the side opposite to the damper and flipping when the door is opened and moving the door to the closed position by the restoring force of the third restoring spring when the door is closed, .

8. The method of claim 7,
Further comprising a bracket connecting the fastening screw and the second door.

The method according to any one of claims 1, 3, and 7,
Further comprising an auxiliary door frame on which the mining glass is inserted above the door frame.

10. The method of claim 9,
Further comprising a fitting frame formed between the door frame and the auxiliary door frame in contact with the mining glass and having a fixing groove corresponding to the thickness of the mining glass.

The method according to any one of claims 1, 3, and 7,
Wherein one of the first door and the second door further comprises an auxiliary glass,
The first door or the second door,
A first chassis disposed at a lower portion of the auxiliary glass and fixing the lower portion of the auxiliary glass;
A second chassis disposed opposite the first chassis and securing an upper portion of the auxiliary glass;
A third chassis coupled to one end of the first and second chassis and fixing one side of the auxiliary glass,
And a fourth chassis coupled to the other end of the first and second chassis and fixing the other side of the auxiliary glass,
The first chassis
A first plate having a first screw coupling hole and a second plate having a second screw coupling hole are formed in the longitudinal direction of the first chassis,
The third chassis
An area corresponding to the first screw connection hole and the second screw connection hole is formed so that the first connection screw and the second connection screw are inserted into the second frame having a hollow square shape for the first chassis and the third chassis connection And a third and fourth screws corresponding to the first and second screw connection holes so that the first engagement screw and the second engagement screw are inserted into the engagement screw insertion groove on the opposite side of the engagement screw insertion groove, Wherein a fastening hole is formed.

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A folding door for folding and opening a plurality of doors while slidably moving the door to a door frame,
A first door having one side fixed to a first fixing part of the door frame;
A second door disposed on a side surface of the first door;
A connecting member connected to the second door by a screw and detachable from the second door and slidably moving the second door to the door frame,
And a first hinge and a second hinge which connect opposite sides of the first door and the second door and have rotation ranges of both directions on opposite sides of the opposite side,
The second door is folded while the first hinge and the second hinge protrude in a direction opposite to the direction of pushing or pulling the first door connected by the first hinge and the second hinge when the second door is pushed or pulled,
Wherein the first hinge and the second hinge are formed while being spaced apart from each other by a predetermined distance on a surface of the first door and the second door facing each other,
The first hinge
A first rotating column;
A second rotating column formed in a shape corresponding to the first rotating column;
A first fixing plate in which the first rotating column and the second rotating column are embedded together with the ball bearing;
A first rotating column spring fixed to one side of the first fixing plate and another side fixed to the first rotating column;
And a second rotating column spring fixed on one side of the first fixing plate and the other side fixed on the second rotating column,
Wherein the first and second rotary column springs extend the first door and the second door 180 degrees around the first fixing plate,
The second hinge
A third rotating column;
A fourth rotating column formed in a shape corresponding to the third rotating column;
A second fixed plate in which the third rotating column and the fourth rotating column are embedded together with the ball bearing;
A third rotating column spring having one side fixed to the second fixing plate and the other side fixed to the third rotating column,
And a fourth rotating column spring fixed to the fourth rotating column at one side thereof, the fourth rotating column spring being fixed to the second fixing plate and the other side thereof being fixed to the fourth rotating column,
And the third rotating column spring and the fourth rotating column spring cause the first door and the second door to spread 180 degrees about the second holding plate.

14. The method of claim 13,
The first hinge
A first auxiliary spring having one side fixed to the first fixing plate and the other side fixed to the first rotating column;
Further comprising a second auxiliary spring having one side fixed to the first fixing plate and the other side fixed to the second rotating column,
The second hinge
A third auxiliary spring having one side fixed to the second fixing plate and the other side fixed to the third rotating column,
Further comprising a fourth auxiliary spring having one side fixed to the second fixing plate and the other side fixed to the fourth pillar.

The method according to any one of claims 1, 3, 7, and 13,
A first windshield plate attached to an upper surface of the first door to increase a sealing force between the first door and the second door and a door frame, a second windshield plate attached to a lower surface of the first door, A third windshield plate attached to an upper surface of the second door, and a fourth windshield plate attached to a lower surface of the second door.

The method according to any one of claims 1, 3, 7, and 13,
Further comprising a locking member for fixing the first door to the door frame so that the connecting member can be opened and closed only by the second door when the connecting member is separated from the second door.