Emergency door with double structure

Abstract

A double-structured emergency door is disclosed. The double-structured emergency door of the present invention comprises: a first door frame portion installed to be rotatable only in one direction relative to a door frame forming an entrance, and having an opening provided on the inner side to open or close the entrance; and a second door portion installed to be rotatable only in the other direction opposite to the one direction relative to the first door frame portion to open or close the opening, wherein the first door frame portion comprises: a first door frame having a cross-sectional shape corresponding to the entrance and rotatably connected to the door frame via a hinge; and a handle portion provided on the first door frame and having a locking portion that engages with or disengages from a locking portion provided on the door frame, and an operating lever that operates to engage with or disengage the locking portion from the locking portion, wherein when the operating lever is operated to disengage the locking portion from the locking portion while the locking portion is fully engaged with the locking portion, the locking portion is disengaged from the locking portion by the lever principle. According to the present invention, even when foreign matter stuck in the contact area between the door frame and the first door frame part, or the contact area between the first door frame part and the second door part, has solidified, the first door frame part and the second door part can be rotated more smoothly by applying the lever principle to open the doorway.

Description

Technology Field

[0001] The present invention relates to a double-structured emergency door that is structured to allow entry and exit in both directions, thereby enabling people to escape quickly, particularly in the event of flooding, and thus minimizing casualties. Background Technology

[0002] Due to climate change, localized torrential rains are occurring more frequently. Consequently, in low-lying or underdeveloped areas with inadequate drainage systems, rainwater is suddenly flowing into basements, underground shopping areas, and underground parking lots, resulting in numerous casualties.

[0003] Currently, fire doors are designed to be pushed open from the inside out; therefore, if the water level on the outside rises above a certain threshold, it becomes difficult for an average adult to push the door open.

[0004] To solve these problems, Korean Patent Publication No. 10-2021-0062936 discloses an emergency escape fire door that can be opened in both directions.

[0005] However, in these conventional fire doors, the bottom of the inner door and the bottom of the outer door are identical; therefore, for example, if the outdoor space is flooded and a person inside opens the inner door, a major problem is inevitable where the water currently in the outdoor space flows directly into the indoor space.

[0006] In addition, due to the nature of fire doors, they remain closed for a long time, so foreign substances may solidify on the edges of the door, making it difficult for the user to easily rotate and open the door when necessary. Prior art literature

[0007] Republic of Korea Published Patent Application No. 10-2021-0062936 (Published June 1, 2021) The problem to be solved

[0008] The present invention has been devised to solve the aforementioned conventional problems and aims to provide a double-structured emergency door that is structured to allow entry and exit in both directions, thereby enabling people to escape quickly, particularly in the event of flooding, and minimizing casualties; furthermore, it aims to enable the door to be rotated and opened more easily even in situations where the door cannot be easily rotated due to foreign matter solidifying on the edges of the door after being kept closed for a long time. means of solving the problem

[0009] According to one aspect of the present invention, a double-structure emergency door is provided, comprising: a first door frame portion rotatably installed in only one direction relative to a door frame forming an entrance, opening or closing the entrance, and having an opening provided on the inner side; a second door portion rotatably installed in only the other direction opposite to the one direction relative to the first door frame portion to open or close the opening, wherein the first door frame portion has a cross-sectional shape corresponding to the entrance and is rotatably connected to the door frame via a hinge; and a handle portion provided on the first door frame and having a locking portion that engages with or disengages from a locking portion provided on the door frame, and an operating lever that operates to engage or disengage the locking portion from the locking portion, wherein when the operating lever is operated to disengage the locking portion from the locking portion while the locking portion is fully engaged with the locking portion, the locking portion is disengaged from the locking portion by the lever principle.

[0010] The locking portion may include a locking block having a locking groove provided on one side, and the catch portion may include: a first catch projection inserted into the inner side of the locking groove and having a caught state when the catch portion is caught in the locking portion; and a second catch projection integrally connected to the first catch projection, maintaining a contact state with the corner portion of the locking block when the first catch projection is inserted into the inner side of the locking groove, and functioning as a lever point while further pressing the locking block when performing an operation to detach the first catch projection from the locking groove through the operation of the operating lever.

[0011] The handle portion comprises a handle rod that is arranged lengthwise along the height direction of the first door frame and whose lengthwise ends are rotatably supported on the first door frame, the catch portion is provided in multiple numbers spaced apart from each other along the lengthwise direction of the handle rod, the lock portion is provided in multiple numbers corresponding to the catch portions, and the operating lever is hinge-rotatably coupled to the handle rod and may be capable of inducing rotation so that the handle rod rotates relative to the first door frame.

[0012] A gap groove is formed between the perimeter of the edge of the first door frame and the door frame, and an elastic packing can be inserted into the gap groove.

[0013] The second door portion may include: a second door having a cross-sectional shape corresponding to the cut-out opening and rotatably connected to the first door portion; a door handle provided on the second door and having a locking projection that is inserted into or removed from a locking groove formed on the inner wall of the cut-out opening, and a lever that operates to insert or remove the locking projection into or from the locking groove; and a locking portion provided to be inserted into or removed from the door handle and capable of allowing or restricting the operation of the lever.

[0014] The second door portion may include: a second door having a cross-sectional shape corresponding to the cut-out opening and rotatably connected to the first door portion; a rotating shaft rotatably provided on the second door and rotatably coupled to the second door; a locking projection protruding from one side of the rotating shaft and inserted into or removed from a locking groove formed on the inner wall of the cut-out opening according to the rotation of the rotating shaft; a lever protruding from the other side of the rotating shaft to rotate the rotating shaft; and a door handle having a plurality of protruding pieces protruding from the outer surface of the rotating shaft and protruding in a direction inclined with respect to the direction in which the locking projection protrudes from the outer surface of the rotating shaft.

[0015] When the lever is rotated so that the locking projection is disengaged from the locking groove, the plurality of protrusions press the inner wall of the opening in a lever manner so that the inner wall of the opening is spaced apart from the inner door by a certain amount, and the plurality of protrusions may be formed to be spaced apart on both sides of the locking projection with respect to the longitudinal direction of the rotation axis.

[0016] The second door portion rotates to open the incision by pulling in a first area on one side relative to the first door portion, and a forced opening portion may be further provided to open the incision by forcibly pushing the second door portion in a second area on the opposite side of the first area.

[0017] The above forced opening portion comprises: a forced opening rod inserted into a first rod insertion hole formed in the second door and also inserted into a second rod insertion hole provided in the door handle; a knob integrally connected to the end of the forced opening rod and disposed in the second area, having a cross-sectional area expanded compared to the forced opening rod; and an elastic member having one end supported on one side of the second door portion facing the second area and the other end supported on the knob to elastically support the forced opening rod and the knob, and when the knob is pushed toward the door handle, the end of the forced opening rod is further inserted into the door handle and presses the lever to release the state in which the locking projection is already inserted into the locking groove.

[0018] The second door portion rotates to open the incision by pulling in a first area on one side relative to the first door portion, and a forced opening portion may be further provided to open the incision by forcibly pushing the second door portion in a second area on the opposite side of the first area.

[0019] The above forced opening portion comprises: a forced opening rod that is inserted into a first rod insertion hole formed in the second door and is configured to press the lever in a direction toward the first area from the second area; a knob integrally connected to the end of the forced opening rod and disposed in the second area, having a cross-sectional area expanded compared to the forced opening rod; and an elastic member that elastically supports the forced opening rod and the knob, with one end supported on one side of the second door portion facing the second area and the other end supported on the knob, and when the knob is pushed toward the door handle, the end of the forced opening rod presses the lever to rotate the rotation axis, thereby releasing the state in which the locking projection is already inserted into the locking groove.

[0020] The above forced opening portion is provided in a form that wraps around the elastic member between one side of the second door facing the second area and the knob, and may further include a forced opening limiting member capable of restricting the end of the forced opening rod from approaching the door handle side.

[0021] The above-mentioned forced opening limiting member may be provided such that one end in the width direction is supported on one side of the second door facing the second area and the other end in the width direction is supported on the knob, and a gap is formed between both ends in the length direction, so as to have an overall C-shaped cross-sectional structure. Effects of the invention

[0022] According to the double-structure emergency door of the present invention described above, even when foreign matter stuck in the contact area between the door frame and the first door frame part, or the contact area between the first door frame part and the second door part, has solidified, the first door frame part and the second door part can be rotated more smoothly by applying the lever principle to open the entrance.

[0023] In addition, a double-structure emergency door can be easily and conveniently installed on an existing door frame through a simple process of installing a lock on the door frame and fixing the first door frame section to the rotating part of the door frame using hinges. In other words, by simply fabricating the first door frame section to fit the size of the existing door frame's entrance, a double-structure emergency door can be installed while utilizing the existing door frame without replacing it.

[0024] In addition, a forced opening part is provided that allows the second door part to be forcibly pushed to open the opening in the second area, which is on the opposite side of the first area, thereby protecting against casualties among people who have no choice but to evacuate from the second area to the first area in an emergency. Brief explanation of the drawing

[0025] FIG. 1 is a front view and a cross-sectional view showing a double-structured emergency door according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view showing the opening operation of the first door frame part and the second door part in FIG. 1. FIGS. 3 and 4 are drawings showing the closing and opening operations of the first door frame portion in a double-structured emergency door according to the first embodiment of the present invention. FIG. 5 is a front view showing the hooked state of the door frame and the first door frame part in a double-structured emergency door according to the first embodiment of the present invention. FIG. 6 is a cross-sectional view showing a double-structured emergency door according to a second embodiment of the present invention, FIG. 7 is a drawing showing a modified example of a double-structured emergency door according to a second embodiment of the present invention, FIG. 8 is a front view and a partial cross-sectional view showing a double-structured emergency door according to a third embodiment of the present invention, FIG. 9 is a perspective view showing a door handle of a double-structured emergency door according to a third embodiment of the present invention, FIG. 10 is a perspective view showing the door handle rotating by the operation of the forced opening part of FIG. 6 in an emergency door with a double open structure according to the third embodiment of the present invention. Specific details for implementing the invention

[0026] Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms; these embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. Identical reference numerals in the drawings refer to identical elements.

[0027] A double-structured emergency door according to a preferred embodiment of the present invention can be installed at entrances requiring security, such as residential homes and commercial buildings, or at entrances of places where security is not a major concern, such as warehouses, schools, and parking lots. It can be used as a fire door and is structured to allow entry in both directions, thereby enabling people to escape quickly, especially in the event of flooding, and thus minimizing casualties.

[0028] The present invention will be described in detail below with reference to various embodiments.

[0029] As illustrated in FIGS. 1 to 5, the double-structure emergency door according to the first embodiment of the present invention includes a first door frame part (100) and a second door part (200).

[0030] First, the first door frame part (100) is installed so as to be rotatable only in one direction relative to the door frame (10) installed at the entrance of a house, commercial building, warehouse, school, underground parking lot, etc., so as to be able to open or close the entrance, and an opening (110) is provided on the inside. Here, the phrase "rotating only in one direction" means rotating only from the inside to the outside, as described later. The first door frame part (100) is installed rotatablely on the door frame (10) through hinges, etc.

[0031] To elaborate, according to fire safety standards, fire doors are designed to open by rotating only from the inside to the outside, and to ensure airtightness in the event of a fire, they are structured so that they cannot rotate in the opposite direction, from the outside to the inside.

[0032] Additionally, the fire door has a structure that prevents it from rotating from the outside to the inside to open the doorway. In this structure, if flooding occurs on the outside side and the water rises to approximately 50 cm, people on the inside side find it difficult to open the doorway by pushing the fire door, i.e., the first door frame (100), toward the outside side due to water pressure, and consequently, there have been frequent cases of serious casualties, and the present invention is intended to solve this problem.

[0033] Next, as illustrated in FIG. 2, the second door section (200) is installed to be rotatable only in the other direction opposite to the one direction relative to the first door frame section (100) with respect to the first door frame section (100) so as to open or close the opening (110). Here, the phrase "rotating only in the other direction" means rotating only from the indoor side to the outdoor side, that is, opening the opening (110) by a user on the outdoor side pulling the second door section (200).

[0034] For convenience of explanation, the indoor side is referred to as the first area and the outdoor side as the second area below.

[0035] Additionally, in the case of a residential house, commercial building, warehouse, or school, the first area refers to the interior space of the building, and the second area refers to the exterior space of the building. Also, in the case of an underground parking lot, the first area refers to the place where parking spaces are provided, and the second area may refer to the space where stairs are provided for moving to the ground level.

[0036] That is, as described above, the present invention provides a structure in which, when a flooding situation occurs, a person in the indoor side (first area) can open the opening (110) of the first door frame (100) by pushing the second door part (200) toward the outdoor side (second area). Additionally, the second door part (200) is structured to open by pushing it toward the outdoor side, opposite to the first door frame part (100), and can be easily opened by the elderly and infirm regardless of water pressure.

[0037] In the present invention, as illustrated in FIG. 1, a damper (140) may be further installed to connect the first door frame (100) and the second door (200) so as to prevent the second door (200) from opening rapidly when the second door (200) is opened.

[0038] Here, the damper (140) may have a hydraulic cylinder structure, and accordingly, the opening speed can be reduced by cushioning the rapid opening of the second door part (200) toward the interior (first direction) by hydraulic pressure.

[0039] As illustrated in FIGS. 1 to 5, the first door frame portion (100) includes a first door frame (101) and a handle portion (103).

[0040] The first door frame (101) has a cross-sectional shape corresponding to the door opening of the door frame (10) and is rotatably connected to the door frame (10) via a hinge. The hinge can be applied in various forms, and in the related drawings, it is illustrated as a folding hinge type as an example, but is not limited thereto.

[0041] In addition to the packing (160) described later, it is preferable to provide a separate rubber pad (not shown) between the door frame (10) and the first door frame (101) to prevent a gap from forming between the door frame (10) and the first door frame (101) and to prevent water from penetrating into the room.

[0042] As illustrated in FIGS. 1 to 5, a handle portion (103) is provided on the first door frame (101) to allow a user to rotate the first door frame (101) to open or close it.

[0043] In an embodiment of the present invention, the handle portion (103) includes a locking portion (104) that engages with or disengages from a locking portion (50) provided in a door frame (10), an operating lever (107) that operates to engage with or disengage the locking portion (104) from the locking portion (50), and a handle rod (108) that is arranged lengthwise along the height direction of the first door frame (101) and whose lengthwise ends are rotatably supported on the first door frame (101).

[0044] The locking part (50) is installed to be fixed on one side of the door frame (10) and includes a locking block (51) having a locking groove (53) provided on one side, and a fixing flange (not shown) integrally connected to both sides of the locking block (51) and fixed to the door frame (10) through a connecting member such as a screw. Here, the locking block (51) may have a channel-shaped cross-section approximately 'C'-shaped with a locking groove (53) formed on one side.

[0045] In an embodiment of the present invention, as shown in FIGS. 3 and 4, the locking portion (104) includes a first locking projection (105) and a second locking projection (106).

[0046] The first locking projection (105) is formed to be inserted into the inner side of the locking groove (53) and locked when the locking portion (104) is engaged with the locking portion (50). Here, the first locking projection (105) is formed to make surface contact with the locking groove (53), and the parts that come into contact with each other may be formed with corresponding shapes. For example, the inner surface of the locking groove (53) may have a curved shape, and a curved surface may be formed on the contact surface of the first locking projection (105) to correspond thereto.

[0047] As illustrated in FIGS. 3 and 4, the second locking projection (106) is integrally connected to the first locking projection (105), and is configured to maintain contact with the corner portion of the locking block (51) when the first locking projection (105) is inserted into the inner side of the locking groove (53), that is, when the locking portion (104) is locked and fixed to the locking portion (50).

[0048] To elaborate, as the locking block (51) is formed in a channel shape approximately in the shape of a 'C' as described above, the locking part (104) can also be formed in a channel shape approximately in the shape of a 'C' so that the first locking projection (105) and the second locking projection (106) satisfy the aforementioned coupling structure.

[0049] In this manner, when the first locking projection (105) and the second locking projection (106) are engaged with the locking block (51), that is, when the first door frame (101) is closed, and when a user performs the operation of the first locking projection (105) to detach it from the locking groove (53) by operating the operating lever (107) in order to open the first door frame (101) to open the door, the second locking projection (106) further presses the locking block (51) and functions as a lever point.

[0050] Additionally, as shown in FIG. 3, when the first locking projection (105) is inserted into the inner side of the locking groove (53) and the first door frame (101) closes the doorway, the second locking projection (106) is in contact with the outer surface of the locking block (51), but is not in a state of particularly pressing the contact surface.

[0051] However, as illustrated in FIG. 4, when the operating lever (107) is operated to detach the locking part (104) from the locking part (50) while the locking part (104) is fully engaged with the locking part (50), that is, while the first locking projection (105) is inserted into the locking groove (53) and engaged, the locking part (104) can be detached from the locking part (50) by the lever principle.

[0052] That is, when the user pulls the operating lever (107) and rotates the handle rod (108) described later, the protruding end of the second locking projection (106) (the part furthest apart from the first locking projection and in contact with the outer surface of the locking block (51)) further presses against the outer surface of the locking block (51) and functions as a lever point, thereby disengaging the first locking projection (105) from the locking groove (53).

[0053] Therefore, the user can easily open the first door frame (101) with less force. Specifically, due to the characteristics of the fire door, the opening operation may not be performed for a long time, and foreign matter, dust, etc. may become stuck between the door frame (10) and the first door frame (101), making it difficult to open; however, as described above, it can be easily opened with less force through the lever principle.

[0054] In an embodiment of the present invention, as illustrated in FIG. 5, the handle rod (108) is positioned along the height direction of the first door frame (101) at a location adjacent to the door frame (10), and both ends in the longitudinal direction are rotatably supported on the first door frame (101). For example, a hinge axis may be formed at both ends in the longitudinal direction of the handle rod (108), and a separate bracket may be provided on the first door frame (101) to rotatably support such a hinge axis; alternatively, a separate rotational support structure may be provided so that both ends of the handle rod (108) are inserted into the first door frame (101) to rotatably support it. A structure that supports the handle rod (108) in a hinged rotatably in this manner can be applied in various ways and is not specifically limited thereto.

[0055] In an embodiment of the present invention, as shown in FIG. 5, a plurality of locking portions (104) are provided spaced apart from each other along the longitudinal direction of the handle rod (108), and a plurality of locking portions (50) are provided spaced apart along the height direction of the door frame (10) to correspond to the plurality of locking portions (104). The plurality of locking portions (104) are provided integrally on one side of the handle rod (108), and when the handle rod (108) rotates, the locking portions (104) also rotate.

[0056] The operating lever (107) is hinge-rotatably coupled to the handle rod (108) and is configured to induce rotation so that the handle rod (108) rotates relative to the first door frame (101).

[0057] Additionally, the operating lever (107) can be arranged in a state where it overlaps with the handle rod (108) in normal circumstances. As shown in FIGS. 3 and 4, when a user wants to open the first door frame (101), the user grasps the end of the operating lever (107) with their hand, rotates it outward toward the handle rod (108), and then pulls it toward the user. At this time, as the handle rod (108) rotates relative to the first door frame (101), the first locking projection (105) is disengaged from the locking groove (53) by the lever point action of the second locking projection (106) as described above, and as the user pulls the operating lever further, the first door frame (101) can be fully opened.

[0058] The hinge rotation coupling structure of the operating lever (107) for the handle rod (108), etc., may be formed by applying a separate bracket, etc., and is not specifically limited thereto.

[0059] In an embodiment of the present invention, as illustrated in FIGS. 1 to 4, a gap groove is formed between the edge perimeter of the first door frame portion (100) and the door frame (10), and an elastic packing (160) can be inserted into the gap groove. The packing (160) may be made of a material such as rubber or silicone. Accordingly, water can be prevented from entering the room through the gap between the first door frame portion (100) and the door frame (10) to the maximum extent.

[0060] In an embodiment of the present invention, the combination of the first door frame part (100) and the second door part (200) can be manufactured separately and easily installed on a door frame (10) in various locations. Specifically, by installing a locking part (50) on the door frame (10) and fixing the first door frame part (100) to the rotating part of the door frame (10) through a hinge, the double-structure emergency door according to the embodiment of the present invention can be easily and easily installed and used on an existing door frame (10) through a simple process of installing a locking part (50) on the door frame (10) and fixing the first door frame part (100) to the rotating part of the door frame (10).

[0061] That is, by simply manufacturing the first door frame part (100) to fit the size of the entrance of the existing door frame (10), it becomes possible to install a double-structure emergency door according to an embodiment of the present invention while utilizing the existing door frame as is without replacing the existing door frame (10).

[0062] As illustrated in FIGS. 6 and 7, the second door section (200) includes a second door (210) and a door handle (220).

[0063] In FIGS. 1 and 2, a locking means for locking or unlocking the second door (210) of the second door section (200) may be a door lock, etc., and in the following drawings and description, the locking / unlocking structure of the second door section (200) is a structure disclosed in the drawings and description.

[0064] The second door (210) has a cross-sectional shape corresponding to the opening (110) to open or close the opening (110) and is rotatably connected to the first door frame (100) through a hinge or the like.

[0065] As illustrated in FIG. 6, the door handle (220) is provided on one side of the second door (210) and has a locking projection (221) that is inserted into or removed from a locking groove (120) formed in the inner wall forming the opening (110), and a lever (222) that operates to insert or remove the locking projection (221) into or from the locking groove (120). The lever (222) is installed to be rotatable with respect to the door handle body, and the locking projection (221) moves in a linear reciprocating motion according to the rotation of the lever.

[0066] Meanwhile, on the inner wall surface forming the opening (100), a protruding projection (11) is provided to contact the second door (210) and restrict the direction of rotation so that the second door (210) rotates only in one direction and cannot rotate in the other direction.

[0067] That is, the user can open the second door (210) by rotating it and opening the cut-out (110) by grasping the lever (222) with their hand and pulling the lever (222) toward the inside (first direction) so that the locking projection (221) is disengaged from the locking groove (120). Conversely, the user can hold the lever (222) with their hand and push the lever (222) toward the outside (second direction) so that the locking projection (221) is inserted into the locking groove (120), thereby keeping the second door (210) in a closed state regarding the cut-out (110).

[0068] Meanwhile, the second door section (200) is not normally opened freely to be used as a passageway, but is provided to be used only in emergencies such as flooding situations. Therefore, it is necessary to ensure that under normal circumstances, even if a user pulls the lever (222) with their hand to open it, the second door (210) does not rotate and the opening (110) does not open freely.

[0069] To this end, the second door part (200) may further include a locking part (not shown) that is provided to be insertable or removable from the door handle (220) and may allow or restrict the operation (pulling or pushing motion) of the lever (222).

[0070] Specifically, the locking part (not shown) may include a locking pin (not shown) that is inserted into or removed from a pin insertion hole (not shown) of the door handle (220) to restrict or allow the operation of the lever (222). Accordingly, under normal circumstances, the manager can maintain the locking pin (not shown) in a state where it is inserted into the pin insertion hole (not shown), and in the event of an emergency such as flooding, the locking pin (not shown) can be removed from the pin insertion hole (not shown) so that anyone can easily open the second door (210) by operating the lever (222). Of course, the locking pin (not shown) can be removed not only by the manager but can also be easily pulled out of the pin insertion hole (not shown) and removed by anyone.

[0071] Hereinafter, a double-structured emergency door according to a second embodiment of the present invention is described. The same reference numerals are used for components identical to those in the first embodiment, and redundant descriptions are omitted.

[0072] The above description was based on the case where people located in the first area open the second door (200) and escape to the second area due to flooding in the second area; however, conversely, a situation may occur where the water level in the second area rises rapidly and people located in the second area (e.g., stairs of an underground parking lot leading to the ground) are unable to move to the ground via the stairs.

[0073] The present invention provides an emergency structure that, in the event of the aforementioned situation, allows people located in a second area to evacuate to the indoor side through the opening by rotating the second door section (200) toward the indoor side (such as a parking space in an underground parking lot) to open the opening (110).

[0074] Specifically, as illustrated in FIG. 6, the double-structure emergency door according to the second embodiment of the present invention further includes a forced opening part (300) that allows the second door part (200) to be forcibly pushed in the second area opposite the first area to open the opening (110).

[0075] In the second embodiment of the present invention, the forced opening portion (300) includes a forced opening rod (310), a knob (320), and an elastic member (330).

[0076] As illustrated in FIG. 6, the forced opening rod (310) is provided with a length greater than a certain amount so as to be inserted into the first rod insertion hole (211) formed in the second door (210) and also into the second rod insertion hole (not shown) provided in the door handle (220).

[0077] The knob (320) is a part that the user holds with their hand, is integrally connected to the end of the forced opening rod (310) located in the second area, is positioned in the second area, and is configured to have an expanded cross-sectional area compared to the forced opening rod (310).

[0078] One end of the elastic member (330) is supported on one side of the second door portion (200) facing the second area, and the other end is supported on the knob (320), thereby elastically supporting the forced opening rod (310) and the knob (320). The elastic member (330) can be applied, for example, as a coil spring.

[0079] Here, as illustrated in FIG. 6, when a person located in the second area pushes the knob (320) and the forced opening rod (310) toward the door handle (220) while holding the knob (320) with their hand, the end of the forced opening rod (310) is further inserted (moved) into the door handle (220) and presses the lever (222) to release the locking projection (221) from being inserted into the locking groove (120).

[0080] That is, with the locking projection (221) inserted inside the locking groove (120), even if a person located in the second area pushes the second door (210) toward the first area instead of the knob (320) and the forced opening rod (310), the second door (210) cannot be rotated to open.

[0081] However, when a person located in the second area holds the knob (320) with their hand while the locking projection (221) is inserted into the locking groove (120) and presses the knob (320) toward the first area, the end of the forced opening rod (310) presses the lever (222) to release the locking state of the locking projection (221), and the second door (210) can also rotate toward the first area by the force of pressing the knob (320) and the opening (110) can be opened.

[0082] Meanwhile, the forced opening part (300) is designed so that it cannot be operated freely under normal circumstances and is used only in emergencies such as flooding, so that a situation in which particularly curious infants and toddlers press the knob (320) out of curiosity and rotate the second door (210) does not occur freely under normal circumstances.

[0083] To this end, as illustrated in FIG. 7, the forced opening portion (300) is provided in a form that wraps an elastic member (330) between one side of the second door (210) facing the second area and the knob (320), and may further include a forced opening limiting member (340) capable of limiting the end of the forced opening rod (310) from approaching the door handle (220).

[0084] Specifically, the forced opening limiting member (340) is supported at one end in the width direction on one side of the second door (210) facing the second area and at the other end in the width direction on the knob (320), and a gap of less than a certain amount is formed between the two ends in the length direction so as to have an overall C-shaped cross-sectional structure.

[0085] The forced opening limiting member (340) can restrict the movement of the knob (320) when installed to surround the elastic member (330), and in an emergency, the user can remove the forced opening limiting member (340) by moving it to the side of the knob (320) and the forced opening rod (310) and then push the knob (320) to open the second door (210).

[0086] Accordingly, when the forced opening limiting member (340) is removed by moving it laterally as described above, it is preferable that the member be made of a material that can be deformed in shape to be at least larger than the diameter of the elastic member (330), so that lateral detachment is possible from an initial state in which the gap between the two ends in the longitudinal direction is smaller than the diameter of the elastic member (330). As an example, the forced opening limiting member (340) may be made of a thin plastic material.

[0087] Hereinafter, a double-structured emergency door according to the third embodiment of the present invention is described. The same reference numerals are used for components identical to those in the first and second embodiments, and redundant descriptions are omitted.

[0088] The double-structured emergency door according to the third embodiment of the present invention is a modified version of the second door section structure of the first embodiment. As described above, the second door section (200) is not normally open and functions as an entrance, but is opened only in emergency situations such as flooding. If the opening (110) is kept closed for a long period of time, such as several months to several years, foreign matter trapped in the contact area between the first door frame section (100) and the second door section (200) may solidify, making it difficult to rotate easily. In such a case, even though a flooding situation occurs and urgent evacuation is required, a problem may arise where the user cannot easily rotate the second door section (200) by simply pulling the lever (see first embodiment) and cannot evacuate quickly.

[0089] The double-structured emergency door according to the third embodiment of the present invention has a modified second door section structure to prevent the occurrence of such problems, and as shown in FIGS. 8 and 9, the second door section (200) includes a second door (210) and a door handle (420).

[0090] The second door (210) has a cross-sectional shape corresponding to the opening (110) to open or close the opening (110) and is rotatably connected to the first door frame (100) through a hinge or the like.

[0091] As illustrated in FIGS. 8 and 9, the door handle (420) is rotatably provided on the second door (210) and includes a rotation axis (421), a locking projection (422), a lever (423), and a plurality of protruding pieces (424).

[0092] The rotation axis (421) is rotatably provided on one side of the second door (210) located near the locking groove (120) through a separate bracket or the like.

[0093] The locking projection (422) protrudes from one side of the rotation axis (421) and is configured to be inserted into or removed from the locking groove (120) formed on the inner wall of the opening (110) according to the rotation of the rotation axis (421).

[0094] The lever (423) protrudes at a distance greater than a certain distance from the other side of the rotation axis (421) opposite to the direction in which the locking projection (422) protrudes, and is provided for a user to hold with their hand and rotate the rotation axis (421).

[0095] That is, the user can open the second door (210) by rotating it and opening the cut-out (110) by grasping the lever (423) with their hand and pulling the end of the lever (423) toward the inside (first direction) to rotate the rotation axis (421) so that the locking projection (422) is moved out of the locking groove (120). Conversely, the user can keep the second door (210) closed by grasping the end of the lever (423) with their hand and pushing the end of the lever (423) toward the outside (second direction) while rotating the rotation axis (421) so that the locking projection (422) is inserted into the locking groove (120).

[0096] As shown in FIGS. 8 and 9, a plurality of protrusions (424) protrude from the outer surface of the rotation axis (421), but protrude in a direction inclined with respect to the direction in which the locking projection (422) protrudes from the outer surface of the rotation axis (421).

[0097] To elaborate, as illustrated in FIGS. 8 and 9, when the locking projection (422) is fully inserted into the locking groove (120) and the second door (210) closes the opening (110), the plurality of protruding pieces (424) are protruded in an inclined direction so that a gap of at least a certain amount is formed between the plurality of protruding pieces (424) and the inner wall forming the opening (110).

[0098] Here, a plurality of protrusions (424) are formed spaced apart from each other on both sides of the locking projection (422) with respect to the longitudinal direction of the rotation axis (421).

[0099] When the locking projection (422) is fully inserted into the locking groove (120) and the second door (210) closes the opening (110), if the user wants to open the opening (110) for emergency evacuation by grasping the end of the lever (423) with their hand and pulling it toward the user to rotate the rotation axis (421), the locking projection (422) moves out of the locking groove (120) as the rotation axis (421) rotates, thereby releasing the locking state of the locking projection.

[0100] Additionally, as the rotation of the rotation axis (421) occurs, the plurality of protruding pieces (424) press the inner wall forming the incision (110) with a force greater than a certain amount.

[0101] That is, as illustrated in FIG. 8, when the user rotates the lever (423) so that the locking projection (422) is disengaged from the locking groove (120), the plurality of protrusions (424) press against the inner wall of the opening (110) so that the inner wall of the opening (110) is separated from the second door (210) by a certain amount, or conversely, so that the second door (210) is separated from the inner wall of the opening (110) by a certain amount. To elaborate, the plurality of protrusions (424) function as a kind of lever, and as described above, when the opening is kept closed for a long time and foreign matter is stuck, the second door (210) can be easily opened by forcibly opening it so that the distance between the second door (210) and the inner wall of the opening (110) increases slightly through this lever method.

[0102] To elaborate, as described above, when a plurality of protrusions (424) press against the inner wall of the opening (110) to slightly increase the distance between the second door (210) and the inner wall of the opening (110), foreign matter that has become fixed between the surface of the second door (210) and the inner wall of the opening (110) can be easily removed from it, and accordingly, the second door (210) can be opened more easily.

[0103] The double-structured emergency door according to the third embodiment of the present invention provides an emergency structure that allows people located in a second area to evacuate to the indoor side through the opening by rotating the second door part (200) toward the indoor side (such as a parking space in an underground parking lot) to open the opening (110), just as in the second embodiment described above. (See second embodiment)

[0104] Specifically, as illustrated in FIG. 10, the double-structure emergency door according to the third embodiment of the present invention further includes a forced opening part (300) that allows the second door part (200) to be forcibly pushed in the second area opposite the first area to open the opening (110).

[0105] In the third embodiment of the present invention, as illustrated in FIG. 10, the forced opening portion (300) includes a forced opening rod (310), a knob (320), and an elastic member (330).

[0106] Here, the forced opening rod (310) is inserted into the first rod insertion hole (211) formed in the second door (210) and is provided with a length greater than a certain amount so that the lever (423) of the door handle (420) can be pressed in the direction from the second area toward the first area.

[0107] The knob (320) is a part that the user holds with their hand, is integrally connected to the end of the forced opening rod (310) located in the second area, is positioned in the second area, and is configured to have an expanded cross-sectional area compared to the forced opening rod (310).

[0108] One end of the elastic member (330) is supported on one side of the second door portion (100) facing the second area, and the other end is supported on the knob (320), thereby elastically supporting the forced opening rod (310) and the knob (320). The elastic member (330) can be applied, for example, as a coil spring.

[0109] Here, as illustrated in FIGS. 8 to 10, when a person located in the second area pushes the knob (320) and the forced opening rod (310) toward the door handle (420) while holding the knob (320) with their hand, the end of the forced opening rod (310) presses the lever (423) of the door handle (420) to rotate the rotation axis (421) and releases the locking projection (422) from being inserted into the locking groove (120).

[0110] That is, with the locking projection (422) inserted inside the locking groove (120), even if a person located in the second area pushes the second door (210) toward the first area instead of the knob (320) and the forced opening rod (310), the second door (210) cannot be rotated to open.

[0111] However, when a person located in the second area holds the knob (320) with their hand while the locking projection (422) is inserted into the locking groove (120) and presses the knob (320) toward the first area, the end of the forced opening rod (310) presses the lever (423), causing the rotation axis (421) to rotate in one direction and release the locking state of the locking projection (422), and the second door (210) also rotates toward the first area due to the force of pressing the knob (320), thereby opening the cut-out (110).

[0112] In addition, the double-structured emergency door according to the third embodiment of the present invention has a forced opening limiting member (340) as in the second embodiment (see FIG. 7), and since this is the same as in the second embodiment, a redundant description is omitted.

[0113] Although the present invention has been illustrated and described above in relation to preferred embodiments for illustrating the principles of the invention, the invention is not limited to the configuration and operation as illustrated and described. Rather, those skilled in the art will understand that numerous changes and modifications to the invention are possible without departing from the spirit and scope of the appended claims. Explanation of the symbols

[0114] 10: Door frame 11: Protruding jaw 50: Locking part 51: Locking block 53: Locking groove 100: First door frame part 101: First door frame 103: Handle part 104: Catching part 105: First catching projection 106: Second locking projection 107: Operating lever 108: Handle pole 110: Incision 120: Locking groove 140: Damper 160: Packing 200: 2nd Door Section 210: 2nd Door 220: Door handle 221: Locking projection 222: Lever 300: Forced opening 310: Forced Opening Load 320: Knob 330: Elastic member 340: Forced opening limiting member 420: Door handle 421: Rotating axis 422: Locking projection 423: Lever 424: Protruding piece

Claims

Claim 1 A first door frame portion installed to be rotatable only in one direction relative to a door frame forming an entrance, opening or closing the entrance and having an opening provided on the inside; and a second door portion installed to be rotatable only in the other direction opposite to the one direction relative to the first door frame portion to open or close the opening, wherein the first door frame portion comprises a first door frame having a cross-sectional shape corresponding to the entrance and rotatably connected to the door frame via a hinge; and includes a handle portion having a locking portion provided on the first door frame and engaging or disengaging from a locking portion provided on the door frame, and an operating lever that operates to engage or disengage the locking portion from the locking portion, wherein when the operating lever is operated to disengage the locking portion from the locking portion while the locking portion is fully engaged with the locking portion, the locking portion is disengaged from the locking portion by the lever principle, and the locking portion includes a locking block having a locking groove provided on one side, and the locking portion comprises a first locking projection that is inserted into the inner side of the locking groove and has a engaged state when the locking portion is engaged with the locking portion; A double-structure emergency door characterized by including a second locking projection that is integrally connected to the first locking projection, maintains contact with the corner portion of the locking block when the first locking projection is inserted into the inner side of the locking groove, and functions as a lever point while further pressing the locking block when the operation of the first locking projection is released from the locking groove through the operation of the operating lever. Claim 2 delete Claim 3 A double-structured emergency door according to claim 1, wherein the handle portion comprises a handle rod that is arranged lengthwise along the height direction of the first door frame and whose lengthwise ends are rotatably supported on the first door frame, the catch portion is provided in a plurality spaced apart from each other along the length direction of the handle rod, the lock portion is provided in a plurality corresponding to the catch portions, and the operating lever is hinge-rotatably coupled to the handle rod and is capable of inducing rotation so as to rotate the handle rod relative to the first door frame. Claim 4 A double-structure emergency door according to claim 1, characterized in that a gap groove is formed between the edge perimeter of the first door frame portion and the door frame, and an elastic packing is inserted into the gap groove.

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