Bidirectional door hinge mechanism and door system including same

Abstract

The present invention relates to a bidirectional door hinge mechanism and a door system including same. The bidirectional door hinge mechanism is installed between door panels to support the door panels so that the door panels can be folded or unfolded in opposite directions, and includes a first and a second support block, a first and a second link member, and a restraint unit. The first and the second support block are paired to face each other and fixed to the door panels. The first link member is disposed on sides of the first and the second support block, and opposite ends thereof are hinge-coupled to the first and the second support block. The second link member is disposed on the other sides of the first and the second support block in a state of being paired with and intersecting the first link member, and opposite ends thereof are hinge-coupled to the first and the second support block. The restraining unit interacts with the first and the second link member in a fully folded state of the door panels to maintain parallelism between the first and the second link member.

Description

Two-way door hinge mechanism and door system including the same

[0001] The present invention relates to a hinge mechanism used in a door installed in an opening for people to enter and exit in a building or the like, or an opening for lighting, etc., and opening and closing the opening in a swinging manner.

[0002] In buildings, various doors are installed at openings for people to enter and exit, or for lighting. Doors are categorized into swing doors, sliding doors, and folding doors based on how they open and close. Swing doors and folding doors are commonly used in areas requiring increased openability.

[0003] However, according to conventional examples, swing doors are configured so that the door panel moves only in the outward direction or only in the inward direction when the opening is opened. If the door panel is configured to move only in the outward direction when the opening is opened, the user cannot handle situations where the door panel needs to move inward.

[0004] Similarly, if the door panel only moves inward when the door is opened, the user will be unable to handle situations where the door panel needs to move outward. This can make using the door inconvenient for the user.

[0005] The object of the present invention is to provide a bidirectional door hinge mechanism and a door system including the same, which not only allows door panels to be folded or unfolded in both directions, but also restricts unnecessary movement of the door panels in a parallel direction when fully folded.

[0006] In order to achieve the above object, a two-way door hinge mechanism according to the present invention is installed between door panels to support the door panels so that they can be folded or unfolded in both directions, and includes first and second support blocks, first and second link members, and a restraint member. The first and second support blocks are fixed to the door panels in pairs facing each other. The first link member is arranged on one side of the first and second support blocks, and both ends are hingedly connected to the first and second support blocks. The second link member is arranged on the other side of the first and second support blocks in a state of crossing the first link member as a pair, and both ends are hingedly connected to the first and second support blocks. The restraint member interacts with the first and second link members when the door panels are fully folded to maintain parallelism between the first and second link members.

[0007] In one aspect, the restraint member may include first and second support walls formed along the side direction of the door panel, respectively, to support the side portions of the first and second link members in a fully folded state of the door panels.

[0008] In another aspect, the restraint member may include first and second support rods extending from the hinge joint axes of the first and second link members, respectively, and seated in the first and second support grooves of the first and second link members when the door panels are in a fully folded state.

[0009] A door system according to the present invention includes a door frame, door panels, a movable link, and two-way door hinge mechanisms. The door frame has an interior space. The door panels are arranged in a row within the interior space of the door frame and are supported on the door frame so as to be rotatably and linearly movable. The movable link has one end hinged to one of the outermost door panels among the door panels and the other end hinged to the door frame, thereby opening and closing the door panel according to the rotational motion. The two-way door hinge mechanisms are installed between the door panels and support the door panels so as to be able to fold or unfold in both directions.

[0010] A two-way door hinge mechanism according to the present invention is installed between door panels to enable the door panels to be folded or unfolded in both directions, and can also restrict unnecessary movement of the door panels in a parallel direction when they are completely folded.

[0011] The door system according to the present invention can enhance convenience by supporting door panels to operate simultaneously in both the indoor and outdoor directions by employing a two-way door hinge mechanism. The door system according to the present invention can enhance utility by minimizing the amount of outdoor or indoor space taken up by the door panels when they are fully open, even when the number of door panels increases.

[0012] FIG. 1 is a perspective view of a two-way door hinge mechanism according to one embodiment of the present invention.

[0013] Figure 2 is an exploded perspective view of Figure 1.

[0014] FIG. 3 is a drawing for explaining the operation of the two-way door hinge mechanism illustrated in FIG. 1.

[0015] Figure 4 is a perspective view showing an example in which first and second cover blocks are formed on first and second support blocks.

[0016] Fig. 5 is a perspective view showing an example in which first and second extension links are formed on first and second support blocks.

[0017] FIG. 6 is a perspective view showing an example in which the two-way door hinge mechanisms illustrated in FIGS. 4 and 5 are mounted on door panels.

[0018] FIG. 7 is a perspective view of a two-way door hinge mechanism according to another embodiment of the present invention.

[0019] Figure 8 is an exploded perspective view of Figure 7.

[0020] Figure 9 is a drawing for explaining the operation of the two-way door hinge mechanism illustrated in Figure 7.

[0021] FIG. 10 is a perspective view of a two-way door hinge mechanism according to another embodiment of the present invention.

[0022] Figure 11 is an exploded perspective view of Figure 10.

[0023] FIG. 12 is a perspective view of a door system according to one embodiment of the present invention.

[0024] Figure 13 is an exploded perspective view of Figure 12.

[0025] Fig. 14 is a plan view for explaining the operation of the door system shown in Fig. 12.

[0026] Figure 15 is a plan view illustrating the operation according to an example in which door panels are supported by guide members installed at the central point.

[0027] Figure 16 is a front view of a latch mechanism mounted on a door panel.

[0028] Figure 17 is a perspective view of the latch mechanism illustrated in Figure 16.

[0029] Figure 18 is an exploded perspective view of Figure 17.

[0030] The present invention will be described in detail with reference to the attached drawings. Here, the same reference numerals are used for the same components, and repetitive descriptions and detailed descriptions of well-known functions and components that may unnecessarily obscure the gist of the present invention are omitted.

[0031] Embodiments of the present invention are provided to more fully explain the present invention to those of ordinary skill in the art. Accordingly, the shapes and sizes of elements in the drawings may be exaggerated for clarity.

[0032] Fig. 1 is a perspective view of a two-way door hinge mechanism according to one embodiment of the present invention. Fig. 2 is an exploded perspective view of Fig. 1. Fig. 3 is a drawing for explaining the operation of the two-way door hinge mechanism illustrated in Fig. 1.

[0033] Referring to FIGS. 1 to 3, a two-way door hinge mechanism (100) according to one embodiment of the present invention is installed between door panels (1210, 1220) to support the door panels (1210, 1220) so that they can be folded or unfolded in both directions, and includes first and second support blocks (110, 120), first and second link members (130, 140), and a restraint member (150).

[0034] The first and second support blocks (110, 120) are paired and face each other and are fixed to the door panels (1210, 1220). Based on the left and right arrangement of the door panels (1210, 1220), the first support block (110) may have a constant vertical thickness. The first support block (110) may be formed in a shape in which the rear end portion is formed as a vertical plane and the front end portion forms a convex curved surface from the rear edge. For example, the first support block (110) may be formed as a semicircular plate having a constant thickness.

[0035] The second support block (120) has the same shape as the first support block (110). The first support block (110) and the second support block (120) are arranged so that their curved portions face each other. Discharge holes (111, 121) for discharging surrounding foreign substances may be formed in the first and second support blocks (110, 120), respectively.

[0036] The first link member (130, 140) is arranged on one side of the first and second support blocks (110, 120). The first link member (130) can be arranged across the upper surfaces of the first and second support blocks (110, 120). Both ends of the first link member (130) are hinge-connected to the first and second support blocks (110, 120).

[0037] The first link member (130) may have a constant vertical thickness. The first link member (130) may have convex curved surfaces at both ends. One end of the first link member (130) is rotatably supported on the first support block (130) by a vertical hinge coupling shaft (131). Here, the hinge coupling shaft (131) may be prevented from coming off by having its upper and lower ends hooked around the shaft holes while its central portion passes through one shaft hole of the first link member (130) and the shaft hole of the first support block (110).

[0038] The other end of the first link member (130) is rotatably supported on the second support block (120) by a vertical hinge coupling shaft (132). Here, the hinge coupling shaft (132) has a central portion that penetrates the other shaft hole of the first link member (130) and the shaft hole of the second support block (120), and the upper and lower ends are caught around the shaft holes to prevent separation.

[0039] The first link member (130) has discharge grooves corresponding to the discharge holes (111, 121) of the first and second support blocks (110, 120) when the door panels are fully folded, thereby enabling smooth discharge of foreign substances from the surroundings.

[0040] The second link member (140) is arranged on the other side of the first and second support blocks (110, 120) in a paired state with the first link member (130) and intersecting with each other. The second link member (140) can be arranged across the lower surfaces of the first and second support blocks (110, 120). Both ends of the second link member (140) are hinge-connected to the first and second support blocks (110, 120).

[0041] The second link member (140) has the same shape as the first link member (130). One end of the second link member (140) is rotatably supported on the first support block (110) by a vertical hinge coupling axis (141). The other end of the second link member (140) is rotatably supported on the second support block (120) by a vertical hinge coupling axis (142). The hinge coupling axes (141, 142) may be configured in the same manner as the hinge coupling axes (131, 132) described above.

[0042] Bushings may be mounted on the hinge joint axes (131, 132) to prevent friction by spacing the first link member (130) away from the first and second support blocks (110, 120) and to avoid interference with the heads of the hinge joint axes (141, 142). Bushings may be mounted on the hinge joint axes (141, 142) to prevent friction by spacing the second link member (140) away from the first and second support blocks (110, 120) and to avoid interference with the heads of the hinge joint axes (131, 132).

[0043] The second link member (140) has discharge grooves corresponding to the discharge holes (111, 121) of the first and second support blocks (110, 120) when the door panels (1210, 1220) are fully folded, thereby enabling smooth discharge of foreign substances from the surroundings.

[0044] The first and second link members (130, 140) can function as follows. As shown in (c) of Fig. 3, the first and second link members (130, 140) hinged to the first and second support blocks (110, 120) in the fully unfolded state of the door panels (1210, 1220) are arranged to intersect at a 90-degree angle.

[0045] In this state, as shown in (b) of FIG. 3, when a force is applied backward to one of the door panels (1210, 1220), the first link member (130) pulls the second support block (120) to rotate it forward in accordance with the forward rotation of the first support block (110), and the second link member (140) pulls the first support block (110) to rotate it forward in accordance with the forward rotation of the second support block (120).

[0046] At this time, the first and second support blocks (110, 120) rotate at the same rotational amount so that the door panels (1210, 1220) can be folded rearward at the same angle. Continuing, as illustrated in (a) of FIG. 3, when the first link member (130) and the second link member (140) move to a parallel position, the door panels (1210, 1220) are completely folded rearward.

[0047] In the state illustrated in (c) of FIG. 3, as illustrated in (d) of FIG. 3, when a force is applied forward to one of the door panels (1210, 1220), the first link member (130) pulls the second support block (120) to rotate backward in accordance with the rearward rotation of the first support block (110), and the second link member (140) pulls the first support block (110) to rotate backward in accordance with the rearward rotation of the second support block (120).

[0048] At this time, the first and second support blocks (110, 120) rotate at the same rotational amount so that the door panels (1210, 1220) can be folded forward at the same angle. Continuing, as illustrated in (e) of FIG. 3, when the first link member (130) and the second link member (140) move to a parallel position, the door panels (1210, 1220) are completely folded forward.

[0049] The restraint member (150) interacts with the first and second link members (130, 140) when the door panels (1210, 1220) are in a fully folded state to maintain parallelism between the first and second link members (130, 140). For example, the restraint member (150) may include first and second support walls (151, 152). The first and second support walls (151, 152) may be formed to extend along the side direction of the door panels (1210, 1220) on the first and second support blocks (110, 120), respectively, to support the side portions of the first and second link members (130, 140) when the door panels (1210, 1220) are in a fully folded state.

[0050] The first support wall (151) may protrude from the upper and lower surfaces of the first support block (110) at a predetermined height at the rear end of the first support block (110). The first support wall (151) may be formed with a predetermined cross-sectional area along the rear end of the first support block (110) to both edges. The inner vertical surface of the first support wall (151) is formed parallel to the rear vertical surface of the first support block (110).

[0051] The second support wall (152) may protrude from the upper and lower surfaces of the second support block (120) at a predetermined height at the rear end of the second support block (120). The second support wall (152) may be formed with a predetermined cross-sectional area along the rear end of the second support block (120) to both edges. The inner vertical surface of the second support wall (152) is formed parallel to the rear vertical surface of the second support block (120).

[0052] As shown in (a) of FIG. 3, when the door panels (1210, 1220) are completely folded rearward, the first link member (130) is supported by evenly contacting the upper portion of the second support wall (152) along the side while being positioned vertically to the door panel (1220), and the second link member (140) is supported by evenly contacting the lower portion of the first support wall (151) along the side while being positioned vertically to the door panel (1210).

[0053] In addition, as illustrated in (e) of FIG. 3, when the door panels (1210, 1220) are fully folded forward, the first link member (130) is supported by evenly contacting the upper portion of the first support wall (151) along the side while being positioned vertically to the door panel (1210), and the second link member (140) is supported by evenly contacting the lower portion of the second support wall (152) along the side while being positioned vertically to the door panel (1220). Therefore, the first and second link members (130, 140) are maintained in parallel by the first and second support walls (151, 152), thereby limiting unnecessary movement in the parallel direction when the door panels (1210, 1220) are fully folded.

[0054] Fig. 4 is a perspective view showing an example in which first and second cover blocks are formed on first and second support blocks. As illustrated in Fig. 4, in the two-way door hinge mechanism (200) of the present embodiment, first cover blocks (116) may be formed on the first support block (110) so as to partially cover the first and second link members (130, 140), respectively, from an end adjacent to the door panel (1210). The first cover blocks (116) may each have the same shape as the first support block (110) and may face the upper and lower surfaces of the first support block (110). The first cover blocks (116) may be connected to the upper and lower ends of the first support wall (151) while being spaced apart from the upper and lower surfaces of the first support block (110) by a constant interval.

[0055] The second support block (120) may be formed with second cover blocks (126) extending from an end adjacent to the door panel (1220) to partially cover the first and second link members (130, 140), respectively. The second cover blocks (126) may each have the same shape as the second support block (120) and may face the upper and lower surfaces of the second support block (120). The second cover blocks (126) may be connected to the upper and lower ends of the second support wall (152) while being spaced apart from the upper and lower surfaces of the second support block (120) by a constant interval.

[0056] These first and second cover blocks (116, 126) cover and safely protect the first and second link members (130, 140). Holes are formed in the first and second cover blocks (116, 126) at locations corresponding to the discharge holes (111, 121) of the first and second support blocks (110, 120) to smoothly discharge surrounding foreign substances. Bushings may be mounted on the hinge joint axes to separate the first and second link members (130, 140) from the first and second cover blocks (116, 126).

[0057] Fig. 5 is a perspective view showing an example in which first and second extension links are formed on first and second support blocks. As illustrated in Fig. 5, in the two-way door hinge mechanism (300) of the present embodiment, a first extension link (117) extending in a direction parallel to the door panel (1210) may be formed on the first support block (110). The first extension link (117) may be formed in a shape having a constant vertical thickness and a constant width and may be connected to the rear end of the first support block (110). The first extension link (117) may be connected to the upper or lower end of the first support wall (151).

[0058] A second extension link (127) extending in a direction parallel to the door panel (1220) may be formed on the second support block (120). The second extension link (127) may be formed in a shape having a constant vertical thickness and a constant width and may be connected to the rear end of the second support block (120). The second extension link (127) may be connected to the upper or lower end of the second support wall (152).

[0059] The first and second extension links (117, 127) can be fixed to the upper or lower surfaces of the door panels (1210, 1220) by bolting or the like, based on the door panels (1210, 1220) that rotate around a vertical axis. The first and second extension links (117, 127) increase the area that is coupled to the door panels (1210, 1220), thereby ensuring that the two-way door hinge mechanism (300) is stably fixed to the door panels (1210, 1220).

[0060] FIG. 6 is a perspective view showing an example in which the two-way door hinge mechanisms illustrated in FIGS. 4 and 5 are mounted on door panels.

[0061] Referring to FIG. 6, in the two-way door hinge mechanism (200) illustrated in FIG. 4, the first and second support blocks (110, 120) may be positioned between the side surfaces of the door panels (1210, 1220) and may be fixed to the side surfaces of the door panels (1210, 1220) through adjacent ends. The first and second support blocks (110, 120) may be fixed to the side surfaces of the door panels (1210, 1220) by bolting or the like.

[0062] In the two-way door hinge mechanism (300) illustrated in FIG. 5, the first and second support blocks (110, 120) can be fixed to the upper or lower surfaces of the door panels (1210, 1220) via the first and second extension links (117, 127) based on the door panels (1210, 1220) that rotate around a vertical axis. The first and second extension links (117, 127) can be fixed to the upper or lower surfaces of the door panels (1210, 1220) by bolting, etc.

[0063] Fig. 7 is a perspective view of a two-way door hinge mechanism according to another embodiment of the present invention. Fig. 8 is an exploded perspective view of Fig. 7. Fig. 9 is a drawing for explaining the operation of the two-way door hinge mechanism illustrated in Fig. 7.

[0064] Referring to FIGS. 7 to 9, in a two-way door hinge mechanism (400) according to another embodiment of the present invention, the restraint member (450) may include first and second support rods (451, 452).

[0065] The first and second support rods (451, 452) may extend from the hinge coupling axes (131, 132, 141, 142) of the first and second link members (130, 140), respectively, and may be seated in the first and second support grooves (436, 446) of the first and second link members (130, 140) in a fully folded state of the door panels (1210, 1220). The first support rods (451) may protrude coaxially downward from the hinge coupling axes (131, 132) of the first link member (130). The second support rods (452) may protrude coaxially upward from the hinge coupling axes (141, 142) of the second link member (140). The first and second support rods (451, 452) can each be formed in a cylindrical shape.

[0066] The first support grooves (436) of the first link member (130) may be formed on both sides of the first link member (130) to selectively insert the second support rods (452) according to the change in the position of the first link member (130). The second support grooves (446) of the second link member (140) may be formed on both sides of the second link member (140) to selectively insert the first support rods (451) according to the change in the position of the second link member (140). The first and second support grooves (436, 446) of the first and second link members (130, 140) are formed in a shape in which the outer portion is wider than the inner portion, for example, in a trapezoidal shape, so that the first and second support rods (451, 452) can be smoothly inserted.

[0067] As shown in (a) of FIG. 9, when the door panels (1210, 1220) are completely folded rearward, the first link member (130) inserts the second support rod (452) into the first support groove (436) while being positioned vertically on the door panel (1220), and the second link member (140) inserts the first support rod (451) into the second support groove (446) while being positioned vertically on the door panel (1210).

[0068] In addition, as illustrated in (e) of FIG. 9, when the door panels (1210, 1220) are fully folded forward, the first link member (130) is positioned vertically on the door panel (1210) and the second support rod (452) is inserted into the first support groove (436), and the second link member (140) is positioned vertically on the door panel (1220) and the first support rod (451) is inserted into the second support groove (446). Accordingly, the first and second link members (130, 140) are maintained in parallel by the first and second support rods (451, 452), thereby limiting unnecessary movement in the parallel direction when the door panels (1210, 1220) are fully folded.

[0069] Fig. 10 is a perspective view of a two-way door hinge mechanism according to another embodiment of the present invention. Fig. 11 is an exploded perspective view of Fig. 10.

[0070] Referring to FIGS. 10 and 11, in the two-way door hinge mechanism (500) according to the present embodiment, the first support block (110) is formed in a pair and forms a first support wall (151) spaced apart from each other, and the second support block (120) is formed in a pair and forms a second support wall (152) spaced apart from each other.

[0071] The first support blocks (110) can be arranged at regular intervals with their rear end portions connected to the upper and lower ends of the first support wall (151). The second support blocks (120) can be arranged at regular intervals with their rear end portions connected to the upper and lower ends of the second support wall (152).

[0072] The first link member (130) is arranged across the space between the first support blocks (110) and the space between the second support blocks (120). One end of the first link member (130) is rotatably supported on the first support blocks (110) by a hinge coupling axis (131), and the other end of the first link member (130) is rotatably supported on the second support blocks (120) by a hinge coupling axis (132).

[0073] The second link member (140) is arranged across the space between the first support blocks (110) and the space between the second support blocks (120). The second link member (140) is arranged close to the first link member (130). One end of the second link member (140) is rotatably supported on the first support blocks (110) by a hinge coupling axis (141), and the other end of the second link member (140) is rotatably supported on the second support blocks (120) by a hinge coupling axis (142).

[0074] Bushings may be mounted on the hinge joint axes (131, 132, 141, 142) to prevent friction by spacing apart the first link member (130) and the second link member (140). In addition, bushings may be mounted on the hinge joint axes (131, 132, 141, 142) to prevent friction by spacing apart the first and second link members (130, 140) from the first and second support blocks (110, 120).

[0075] The first link member (130) has first interference avoidance grooves (536) to avoid interference with the hinge coupling axes (141, 142) of the second link member (140). The first interference avoidance grooves (536) can be formed on both sides of the first link member (130) so that the hinge coupling axes (141, 142) of the second link member (140) can be selectively inserted without interference according to a change in the position of the first link member (130).

[0076] The second link member (140) has second interference avoidance grooves (546) to avoid interference with the hinge coupling axes (131, 132) of the first link member (130). The second interference avoidance grooves (546) can be formed on both sides of the second link member (140) so that the hinge coupling axes (131, 132) of the first link member (130) can be selectively inserted without interference according to a change in the position of the second link member (140).

[0077] The first and second interference avoidance grooves (536, 546) are formed in a shape in which the outer portion is wider than the inner portion, for example, in a trapezoidal shape, so that the hinge joint axes (131, 132, 141, 142) can be smoothly inserted. The two-way door hinge mechanism (500) of the present embodiment can be made thinner than the two-way door hinge mechanism (200) of the embodiment illustrated in FIG. 4.

[0078] Meanwhile, although not shown, the two-way door hinge mechanism (100, 200, 300, 400, 500) may also include a restoring spring that maintains the door panels (1210, 1220) in a fully extended state.

[0079] Fig. 12 is a perspective view of a door system according to one embodiment of the present invention. Fig. 13 is an exploded perspective view of Fig. 12. Fig. 14 is a plan view for explaining the operation of the door system illustrated in Fig. 12.

[0080] Referring to FIGS. 12 to 14, a door system (1000) according to one embodiment of the present invention includes a door frame (1100), door panels (1210, 1220), movable links (1300), and two-way door hinge mechanisms (1400).

[0081] Here, two-way door hinge mechanisms (1400) are installed between door panels (1210, 1220) to support the door panels (1210, 1220) so that they can be folded or unfolded in both directions. The two-way door hinge mechanisms (1400) may be composed of the two-way door hinge mechanisms (100, 200, 300, 400, 500) of the above-described examples.

[0082] The door frame (1100) has an interior space. The door frame (1100) can be installed along the inner perimeter of an opening for people to enter or exit in a building or the like, or an opening for lighting, etc. The door frame (1100) is configured with a structure in which horizontal and vertical frames are connected, and can define a rectangular interior space.

[0083] Door panels (1210, 1220) are arranged in a row in the interior space of the door frame (1100) and are supported on the door frame (1100) so as to be rotatable and linearly movable. The door panels (1210, 1220) are arranged left and right on the door frame (1100) and can rotate and linearly move around a vertical axis to open and close. The door panels (1210, 1220) may be formed in a square shape.

[0084] The door panels (1210, 1220) can be supported rotatably and linearly on the door frame (1100) via guide members (1500) installed at eccentric points. Since the rotational load of the door panel guide members (1500) can be reduced when they rotate at eccentric points compared to the central point, the door panels can be opened and closed with relatively small force.

[0085] The guide member (1500) may include a roller support (1510) and a plurality of rollers (1520). The roller support (1510) is hingedly connected to the door panel (1210, 1220) so as to be rotatable about a vertical axis, so that the door panel (1210, 1220) can be rotatably supported on the door frame (1100). The rollers (1520) are mounted on the roller support (1510) so as to roll along the rail of the door frame (1100), so that the door panel (1210, 1220) can be linearly supported on the door frame (1100).

[0086] The movable link (1300) has one end hinged to one of the outermost door panels (1210, 1220) and the other end hinged to the door frame (1100) to open and close the door panel (1210) according to the rotational motion. The movable links (1300) are provided in pairs and are arranged on the upper and lower sides of the corresponding door panel (1210) to stably open and close the door panel (1210).

[0087] In an additional aspect, the movable link (1300) may be equipped with a hydraulic hinge (1600). The hydraulic hinge (1600) may have a hinge body fixed to the door frame (1100) and a movable shaft coaxially coupled to one hinge connection end of the movable link (1300) to provide a hydraulic cushioning action when the door panel (1210) is closed. The hydraulic hinge (1600) may have a hinge body fixed within the door frame and a movable shaft fixed to one hinge connection end of the movable link (1300).

[0088] The hydraulic hinge (1600) can be configured in various ways, such as a known hydraulic floor hinge. For example, the hydraulic floor hinge is configured to install an actuator together with a fluid inside a casing, and connect a movable shaft to the lower part of the door panel (1210) so as to control the rotational motion of the door panel (1210) by the spring of the actuator and the hydraulic action inside the casing.

[0089] Figure 15 is a plan view illustrating the operation according to an example in which door panels are supported by guide members installed at the central point.

[0090] As illustrated in FIG. 15, the door panels (1210, 1220) can be supported rotatably and linearly on the door frame (1100) via guide members (1500) installed at the central point. When the door panels (1210, 1220) rotate at the central point, the rotation radius of the door panels (1210, 1220) is reduced by half, making them suitable for use in narrow spaces.

[0091] The guide member (1500) can be installed on the door panel (1210, 1220) in a sliding manner so that its position can be adjusted. Therefore, before manufacturing the door system (1000), the rotational axis positions of the door panels (1210, 1220) can be set by adjusting the position of the guide member (1500) to a user-specific level, and the rotational axis positions of the door panels (1210, 1220) can be adjusted and applied by adjusting the position of the guide member (1500) to fit the space according to an unexpected situation at the work site. In this case, the door panel (1210, 1220) can be provided with a rail that supports the sliding movement of the guide member (1500).

[0092] Meanwhile, although not shown, the door panels are arranged vertically on the door frame and can open and close by rotating and moving linearly about a horizontal axis. The door panels can open and close vertically. In this case, the door system can be used as a window by lowering its height, and can be used as an awning to block rain or sunlight when installed in an external opening. The door system can be configured with an additional weight-reducing member that acts as a separate counterweight to prevent the door panel from suddenly lowering.

[0093] Additionally, the door panels are equipped with three or more and can be opened and closed by folding or unfolding in both directions in a zigzag shape.

[0094] Fig. 16 is a front view of a latch mechanism mounted on a door panel. Fig. 17 is a perspective view of the latch mechanism illustrated in Fig. 16. Fig. 18 is an exploded perspective view of Fig. 17.

[0095] Referring to FIGS. 16 to 18, a door latch (1700) may be mounted on a door panel (1220) adjacent to a latch groove (1110) of a door frame (1100) and interacts with the latch groove (1110) to maintain the closed state of the door panel (1210, 1220). For example, the door latch (1700) may include a latch bracket (1710), a latch head (1720), a latch block (1730), and a spring (1740) for a latch.

[0096] The latch bracket (1710) has a hole corresponding to the latch groove (1110) of the door frame (1100) and is fixed to the door panel (1220). The latch bracket (1710) may include a bracket plate (1711) having a hole and a bracket body (1712) connected to the bracket plate (1711). The bracket body (1712) is accommodated in the mounting groove of the door panel (1220). The bracket plate (1711) is arranged so that the hole corresponds to the mounting groove of the door panel (1220) and may be fixed around the mounting groove of the door panel (1220).

[0097] The latch head (1720) is configured to have a diameter that decreases from the center to both ends, and is inserted into or separated from the latch groove (1110) of the door frame (1100). The latch head (1720) may have an oval cross-section. Since the latch head (1720) is configured in a curved shape along the circumferential direction, it can be smoothly inserted into and separated from the latch groove (1110) of the door frame (1100) according to the bidirectional opening and closing operation of the door panel (1220).

[0098] The latch block (1730) is supported by the latch bracket (1710) so as to be movable in the forward and backward direction with respect to the opening of the latch bracket (1710) while rotatably supporting both ends of the latch head (1720). The latch block (1730) moves in the forward and backward direction while being accommodated in the bracket body (1712) and allows the latch head (1720) to be inserted and removed through the opening of the bracket plate (1711). The latch block (1730) can be smoothly separated and inserted into the latch groove (1110) of the door frame (1100) since the portion supporting both ends of the latch head (1720) is formed in a curved shape in the circumferential direction of the latch head (1720).

[0099] The latch spring (1740) elastically biases the latch block (1730) toward the hole of the latch bracket (1710). The latch spring (1740) moves the latch head (1720) forward by elastic force and maintains it inserted into the latch groove (1110) of the door frame (1100). The latch spring (1740) elastically deforms when force is applied in the backward direction of the latch head (1720).

[0100] Accordingly, the latch head (1720) can be moved forward and backward while supported by the elastic force of the latch spring (1740) and can be inserted into and removed from the latch groove (1110). The latch spring (1740) is made of a compression coil spring and can be placed between the latch block (1730) and the bracket body (1712).

[0101] These door latches (1700) enable the door panels (1210, 1220) to open immediately when the user pushes or pulls the door panels (1210, 1220) in both directions, and enable the door panels (1210, 1220) to be aligned exactly parallel when closed.

[0102] In an additional aspect, the door latch (1700) may include a gap adjusting mechanism. The gap adjusting mechanism adjusts the gap between the aperture of the latch bracket (1710) and the latch block (1730), thereby allowing the maximum protrusion distance of the latch head (1720) with respect to the aperture of the latch bracket (1710) to be adjusted. Accordingly, the maximum protrusion distance of the latch head (1720) with respect to the door panel (1220) on which the latch bracket (1710) is mounted is adjusted, thereby allowing the door frame (1100) to respond to a deviation between the latch groove (1110) and the door panel (1220).

[0103] For example, the gap adjustment mechanism may include a gap adjustment hole (1751), a gap adjustment piece (1752), and a gap adjustment bolt (1753). The gap adjustment hole (1751) is formed by penetrating the latch bracket (1710) in the front-back direction near the hole of the latch bracket (1710). The gap adjustment piece (1752) is formed by protruding from the latch block (1730) so as to face the gap adjustment hole (1751).

[0104] The gap adjustment bolt (1753) is fastened to the screw hole (1752a) of the gap adjustment piece (1752) while the head is supported at the rear periphery of the gap adjustment hole (1751). The gap adjustment bolt (1753) is fastened to the gap adjustment piece (1752) in such a way that the amount thereof is adjusted as it rotates forward and reversely, thereby allowing the gap between the gap adjustment hole (1751) and the gap adjustment piece (1752) to be adjusted. As a result, the gap between the latch block (1730) and the hole of the latch bracket (1710) can be adjusted.

[0105] The user can adjust the gap between the hole of the latch block (1730) and the latch bracket (1710) by inserting and operating a screw driver through the gap adjustment hole (1751) to rotate the gap adjustment bolt (1753) forward and reversely.

[0106] While the present invention has been described with reference to the embodiments illustrated in the accompanying drawings, these are merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible. Accordingly, the true scope of protection of the present invention should be determined solely by the appended claims.

Claims

1. A two-way door hinge mechanism installed between door panels to support the door panels so that they can be folded or unfolded in both directions. First and second support blocks are fixed to the door panels in pairs facing each other; A first link member disposed on one side of the first and second support blocks, and having both ends hingedly connected to the first and second support blocks; A second link member is arranged on the other side of the first and second support blocks in a crossed state with the first link member, and both ends are hinge-connected to the first and second support blocks; and A restraint member that interacts with the first and second link members to maintain parallelism between the first and second link members when the door panels are in a fully folded state; A two-way door hinge mechanism including:

2. In paragraph 1, The above restraints are, A two-way door hinge mechanism characterized in that it includes first and second support walls formed along the side direction of the door panel, respectively, on the first and second support blocks to support the side portions of the first and second link members in a fully folded state of the door panels.

3. In paragraph 2, The first support blocks are formed in pairs and spaced apart from each other to form the first support wall; The second support blocks are formed in pairs and spaced apart from each other to form the second support wall; The first link member is arranged across the space between the first support blocks and the space between the second support blocks and has first interference avoidance grooves to avoid interference with the hinge joint axes of the second link member; A two-way door hinge mechanism characterized in that the second link member is arranged across the space between the first support blocks and the space between the second support blocks and has second interference avoidance grooves for avoiding interference with the hinge joint axes of the first link member.

4. In paragraph 1, The above restraints are, A two-way door hinge mechanism characterized in that it includes first and second support rods that extend from the hinge joint axes of the first and second link members and are seated in the first and second support grooves of the first and second link members when the door panels are in a fully folded state.

5. In paragraph 1, The first support block is formed with first cover blocks extending from an end adjacent to the door panel to partially cover the first and second link members, respectively; A two-way door hinge mechanism characterized in that the second support block is formed with second cover blocks extending from an end adjacent to the door panel to partially cover the first and second link members, respectively.

6. In paragraph 1, A two-way door hinge mechanism characterized in that the first and second support blocks are arranged between the side surfaces of the door panels and are fixed to the side surfaces of the door panels through adjacent ends.

7. In paragraph 1, A first extension link extending in a direction parallel to the door panel is formed on the first support block, and a second extension link extending in a direction parallel to the door panel is formed on the second support block; A two-way door hinge mechanism characterized in that the first and second support blocks are fixed to the upper or lower surfaces of the door panels through the first and second extension links, based on the door panels that rotate around a vertical axis.

8. Door frame with internal space; Door panels arranged in a row in the inner space of the door frame and supported so as to be rotatable and linearly movable on the door frame; A movable link having one end hinged to one of the outermost door panels among the door panels and the other end hinged to the door frame to open and close the door panel according to the rotational motion; and A two-way door hinge mechanism as described in any one of claims 1 to 7, which is installed between the door panels and supports the door panels so that they can be folded or unfolded in both directions; Door system including.

9. In paragraph 8, A door system characterized in that the door panels are supported to be rotatably and linearly movable on the door frame through guide members installed at eccentric points or central points.

10. In paragraph 9, A door system characterized in that the above guide member is installed on the door panel so as to be positionally adjustable in a sliding manner.

11. In paragraph 8, A door system characterized in that the door panels are arranged left and right on the door frame and rotate about a vertical axis and move linearly to open and close, or are arranged up and down on the door frame and rotate about a horizontal axis and move linearly to open and close.

12. In paragraph 8, A door system characterized in that it includes a hydraulic hinge in which a hinge body is fixed to the door frame and a movable shaft is coaxially connected to one hinge joint end of the movable link to provide a hydraulic cushioning action when the door panel is closed.

13. In paragraph 8, A door latch is provided on a door panel adjacent to a latch groove of the door frame, the door latch interacting with the latch groove to maintain the door panel in a closed state; The above door latch, A latch bracket having a hole corresponding to the latch groove of the door frame and fixed to the door panel, A latch head having a diameter that decreases from the center to both ends and is inserted into or separated from the latch groove of the door frame, A latch block supported by the latch bracket so as to be movable in the forward and backward direction with respect to the hole of the latch bracket while rotatably supporting both ends of the latch head, and A door system characterized by including a spring for a latch that elastically biases the latch block in a direction that moves it toward the aperture of the latch bracket.

14. In paragraph 13, The above door latch, A gap adjusting mechanism is included to adjust the gap between the hole of the latch bracket and the latch block, thereby adjusting the maximum protrusion distance of the latch head with respect to the hole of the latch bracket; The above spacing adjustment mechanism is, A gap adjustment hole formed by penetrating the latch bracket in the front-back direction near the hole of the latch bracket, A gap adjustment piece formed by protruding from the latch block so as to face the gap adjustment hole, and A door system characterized in that it includes a gap adjustment bolt in which a screw portion is fastened to a screw hole of the gap adjustment piece while the head portion is supported around the rear of the gap adjustment hole.

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