Door hinge and folding door and window structure

Abstract

The utility model discloses a door hinge and a folding door and window structure, the door hinge comprises a hinge piece, a hinge shaft and a laminated clamping piece, the hinge piece is provided with a shaft sleeve, the hinge piece is connected with the laminated clamping piece through a connecting screw, the hinge shaft is arranged in the shaft sleeve in a penetrating manner, the two ends of the hinge shaft are respectively provided with a fixed shaft seat, and the fixed shaft seats are provided with locking screw holes. The folding door and window structure comprises a middle column profile and a door leaf profile which are hinged through the door hinge. According to the door hinge and the folding door and window structure, the fixed shaft seat is installed on the sectional material through the screw, and the defect that the bearing gravity center of the hinge shifts is overcome through stress of the fixed shaft seat.

Description

Technical Field

[0001] The utility model relates to the technical field of door and window connecting components, in particular to a door hinge and a folding door and window structure. Background Art

[0002] The Chinese utility model patent (application number 202122621534.4, announcement date 2023.04.25) discloses a hinge for a folding door, including a hinge shaft, a first leaf fixed inside, a second leaf rotating outside, a first gasket and a second gasket, the first leaf and the second leaf can be rotated on the hinge shaft, and the first gasket and the second gasket are connected to the first leaf and the second leaf by screws respectively. The hinge shaft includes a shaft body and a hinge shaft sleeve, and the two hinge shaft sleeves are respectively arranged at the two ends of the shaft body. The first leaf is sleeved on the two ends of the shaft body through the sleeve part, and the second leaf is sleeved in the middle of the shaft body. The gasket of the hinge installation screw has a certain eccentric distance from the stress-bearing part of the hinge shaft, and the middle of the second hinge rotating outside is cut out to present a concave-shaped overlapping notch, which causes the leaf to be unevenly stressed, and the stressed part has a certain impact. Affected by the weight of the door leaf and the torque of the door leaf opening and closing action, long-term use will cause the leaf to be at risk of breaking. In addition, the internally fixed leaf pieces are provided with gaskets to form the clamping groove structures on both sides to clamp the profiles respectively, which is more complicated, and the screw connection points are prone to loosening, causing damage to the folding door.

[0003] like Figure 1 and Figure 2 The figure shows a schematic diagram of the structure of a door hinge of the prior art and its installation on a door leaf profile. In the door hinge, sleeves are provided at both ends of the outer rotating leaf 1a1 and sleeved on both ends of the rotating shaft, and a sleeve is provided in the middle of the inner fixed leaf and sleeved on the middle shaft position of the rotating shaft. A concave-shaped rotating shaft sleeve 1a2 is sleeved on both ends of the rotating shaft. During use, the weight-bearing force-bearing portion between the rotating shaft sleeve 1a2 of the concave-shaped outer rotating leaf 1a1 and the body of the leaf 1a1 is subjected to the torque generated by the opening and closing action of the door leaf, and the bearing center of gravity of the hinge is offset. Long-term use will cause the outer rotating leaf to appear as follows: Figure 1 The risk of fracture as shown by the fracture line b. The fixing structure of the fixed leaf piece in the same leaf is also formed by a gasket to clamp the profile, which has the disadvantages of complex structure and unstable installation. Utility Model Content

[0004] The purpose of the utility model is to provide a door hinge and folding door and window structure. The door hinge simplifies the structure to form an outer rotating leaf piece into a whole piece of stressed leaf piece. The outer rotating leaf piece cooperates with the stacked clip piece to clamp the profile through locking screws. The inner fixation is provided with a fixed shaft seat structure that is independently fixed up and down. The technical purpose of stable stress is achieved by directly buckling the fixed shaft seat with the profile groove and locking with screws. The fixed shaft seat is installed on the profile by screws. The fixed shaft seat is used to achieve stable fixation, reasonable stress, and reduce the eccentric torque of rotation. The whole piece of stressed leaf piece solves the defect that the load-bearing center of gravity of the outer rotating hinge is offset and easy to break. At the same time, the technical effect of unlimited large-angle rotation is achieved.

[0005] To achieve the above-mentioned purpose, the technical solution provided by the utility model is: a door hinge, including a hinge piece, a hinge shaft, and a stacked clip, the hinge piece is provided with a shaft sleeve, the hinge piece and the stacked clip are connected by connecting screws, wherein: the hinge shaft is passed through the shaft sleeve, and fixed shaft seats are respectively provided at both ends, and locking screw holes are provided on the fixed shaft seats.

[0006] The utility model adopts the above technical solution. The door hinge has a simplified structure. The internal fixed shaft seat is provided with a fixed shaft seat structure that is independently fixed up and down. The technical purpose of stable force is achieved by directly buckling the fixed shaft seat with the profile groove and locking with screws. The fixed shaft seat is installed on the profile by locking screws. The outer rotating leaf piece is formed into a whole piece of force-bearing leaf piece. The outer rotating leaf piece is combined with the stacked clip piece by connecting screws to achieve a combined assembly, and then the profile is locked by the locking screw of the locking screw hole. The fixed shaft seat is used to achieve stable fixation, reasonable force, and reduce the eccentric torque of rotation. The whole piece of force-bearing leaf piece solves the defect that the load-bearing center of gravity of the outer rotating hinge is offset and easy to break.

[0007] The above-mentioned door hinge has a leaf installation hole between the hinge piece and the stacked clip, and a clamping groove is formed on both sides. During installation, the hinge piece and the stacked clip are connected as a whole, and the free outer end of the clamping groove of the buckle profile is clamped through the clamping groove, and the hinge piece and the stacked clip connected as a whole are connected to the profile through the mounting screws in the leaf installation hole. Its structure forms a multi-point positioning structure with reasonable force and stable positioning.

[0008] The above-mentioned door hinge has slots on both sides of the fixed shaft seat. During installation, the fixed shaft seat is installed in the slot of the aluminum profile, and then the free outer end of the slot of the buckle profile is positioned through the slot to form a multi-point positioning structure with reasonable force and stable positioning.

[0009] The above-mentioned door hinge has annular grooves at both ends of the hinge shaft, and the fixed shaft seat is provided with radial locking screws positioned in the annular grooves. The radial locking screws are positioned in the annular grooves, so that the fixed shaft seat and the hinge shaft are rotatably connected, so that they can rotate relative to each other but cannot move axially.

[0010] In the above-mentioned door hinge, the shaft sleeve includes a connecting block connected to the hinge piece. The connecting block and the hinge piece are connected and extended, and the connecting block extends outwards and forms an axial hole of the shaft sleeve at the free outer end, so that the hinge piece and the fixed shaft seat are offset, and the hinge shaft is inserted and positioned in the shaft hole, so that the hinge piece can directly rotate around the fixed shaft seat and the hinge shaft, and the hinge piece can rotate at a large angle.

[0011] In the above-mentioned door hinge, both ends of the shaft hole of the shaft sleeve are provided with inner sleeves, which are arranged between the hinge shaft and the shaft sleeve, and the inner sleeves rotate on the hinge shaft, thereby reducing the wear of the shaft sleeve and achieving a mute technical effect.

[0012] The above-mentioned door hinge has a fixing shaft seat with a tightening hole, a tightening screw in the tightening hole, and a mounting screw in the locking screw hole. The tightening screw passes through the fixing shaft seat to adjust the gap between the fixing shaft seat and the profile, thereby achieving the technical effect of fine-tuning the angle of the fixing shaft seat mounting surface.

[0013] The above-mentioned door hinge has a gap adjustment hole on the hinge piece, and a gap adjustment screw is arranged in the gap adjustment hole. The gap adjustment screw cooperates with the connecting screw to adjust the gap between the hinge piece and the stacked clip, and fine-tune the angle of the hinge piece installation surface to achieve the effect of adjusting the door leaf gap.

[0014] In the above-mentioned door hinge, the fixed shaft seat is respectively stacked with split clips, which are connected by connecting screws, and a slot is formed on both sides. The internal fixed shaft seat is provided with a fixed shaft seat structure that is independently fixed up and down, and an independent split clip is provided, which is connected by connecting screws to achieve a combined assembly. When connected as one, the free outer end of the slot of the buckle profile is clamped by the slot, and the fixed shaft seat and the split clip connected as one are connected to the profile by the mounting screws in the mounting hole.

[0015] The above-mentioned door hinge has an arc-shaped connecting block. Through the arc-shaped connecting block, the hinge piece and the fixed shaft seat are offset, so that the outer surface of the hinge piece and the inner surface of the fixed shaft seat can be offset to be flush, so that the hinge piece can directly rotate around the fixed shaft seat and the hinge shaft, and the hinge piece can rotate at a large angle without restriction.

[0016] The locking screw hole and / or the top tightening hole of the fixed shaft seat of the above-mentioned door hinge lead to the card slot. Through the locking screw hole or the top tightening hole communicating with the card slot, when the fixed shaft seat is installed, the screw in the locking screw hole penetrates the aluminum profile in the card slot to lock the fixed shaft seat, and the inner end of the top tightening screw in the top tightening hole abuts against the aluminum profile in the card slot to lock and fix, so as to install the fixed shaft seat, and the top tightening screw fine-tunes the installation surface of the fixed shaft seat.

[0017] Another technical solution provided by the utility model is: a folding door and window structure, comprising a center column profile and a door leaf profile, wherein the center column profile and the door leaf profile are hingedly connected by the door hinge described in any of the above technical solutions.

[0018] In the above-mentioned folding door and window structure, the fixed shaft seat is fixed to the installation notch of the center column profile or the door leaf profile by means of mounting screws, the hinge piece is connected to the stacked clip piece by means of screws, and a clip groove is formed on both sides therebetween, the stacked clip piece and both sides of the installation notch of the door leaf profile or the center column profile are formed into a clip groove, and the locking screw tightens the stacked clip piece and the clip groove to clamp the door leaf profile or the center column profile. When the hinge is installed, it is inserted into the installation notch of the profile, and will not be misaligned due to the force on the door leaf, and the gap between the notch of the profile and the hinge piece is adjusted by the gap tightening screw to adjust the gap between the hinge piece and the installation notch of the profile.

[0019] In the above folding door and window structure, the center column profile and the door leaf profile are provided with mutually matching sealing strips. The fixed shaft seat is connected to the installation notch, which occupies a small space, and the sealing strip does not need to be disconnected, and the whole strip can be installed, which is convenient and quick.

[0020] The beneficial effects achieved by the utility model are as follows: the hinge piece and the fixed shaft seat are installed and fixed on the profile, and are connected by the hinge shaft. The hinge piece can rotate around the hinge shaft, thereby driving the door profile to open and close. The fixed shaft seats at both ends of the hinge shaft are used to support the hinge shaft and connect the profile, which solves the defect of the load-bearing center of gravity offset when the middle of the existing hinge is cut out in a concave shape, so that the center of gravity of the hinge is all concentrated on the fixed shaft seats at both ends of the hinge, reducing the force on the hinge piece and reducing the risk of hinge breakage during long-term use. The fixed shaft seat is installed and fixed on the profile, and the fixed shaft seat occupies a small space. The sealing strip does not need to be disconnected, and the whole strip can be installed conveniently and quickly. The fixed shaft seat is arranged at both ends of the hinge shaft, and cooperates with the shaft sleeve of the hinge piece, so that the hinge shaft can be completely hidden. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a door hinge in the prior art;

[0022] Figure 2 It is a structural schematic diagram of a door hinge installed on a door leaf in the prior art;

[0023] Figure 3 It is a three-dimensional structural schematic diagram of a door hinge of an embodiment of the utility model;

[0024] Figure 4 It is a side view structural schematic diagram of a door hinge of an embodiment of the utility model;

[0025] Figure 5 It is a schematic diagram of the top view of the door hinge of an embodiment of the utility model;

[0026] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure at AA in the middle;

[0027] Figure 7 It is a rear structural schematic diagram of a door hinge of an embodiment of the utility model;

[0028] Figure 8 It is a schematic diagram of the exploded structure of the door hinge of the utility model;

[0029] Fig. 9 It is a three-dimensional structural schematic diagram of another embodiment of the door hinge of the utility model;

[0030] Fig.10 It is a schematic diagram of the main structure of another embodiment of the door hinge of the utility model;

[0031] Fig.11 yes Fig.10 A schematic cross-sectional structure diagram of another embodiment of the door hinge of the utility model at BB;

[0032] Fig.12 It is a schematic diagram of the exploded structure of another embodiment of the door hinge of the utility model;

[0033] Fig.13 This is a three-dimensional structural schematic diagram of another embodiment of the door hinge of the utility model;

[0034] Fig.14 This is a schematic diagram of the main structure of another embodiment of the door hinge of the utility model;

[0035] Fig.15 yes Fig.14 A schematic cross-sectional view of another embodiment of the door hinge of the present invention at CC;

[0036] Fig.16 This is a schematic diagram of the structure of the folding door and window structure in a closed state according to an embodiment of the utility model;

[0037] Fig.17 This is a schematic structural diagram of the folding door and window structure of the utility model in an open state;

[0038] Fig.18 It is a structural schematic diagram of another installation method of the door hinge of the folding door and window structure of the embodiment of the utility model in a closed state;

[0039] Fig.19 It is a structural schematic diagram of another installation method of the door hinge of the folding door and window structure of the embodiment of the utility model in the open state;

[0040] Fig. 20 This is a schematic structural diagram of a folding door and window structure in a closed state according to another embodiment of the utility model;

[0041] Fig.21 This is a structural schematic diagram of a folding door and window structure in an open state according to another embodiment of the utility model;

[0042] Fig. 22 yes Figure 9-12 A schematic structural diagram of another embodiment of the utility model wherein the door hinge is installed on the door and window structure;

[0043] Fig.23 yes Figure 13-15 A schematic structural diagram of a door hinge installed on a door and window structure in another embodiment of the utility model;

[0044] Fig.24 It is a structural schematic diagram of the center column profile and the door leaf profile of the folding door and window structure of the embodiment of the utility model;

[0045] Fig.25 It is a structural schematic diagram of the center column profile and the door leaf profile of the folding door and window structure in another installation method of the embodiment of the utility model.

[0046] Explanation of the accompanying drawings: door hinge 1a, hinge piece 1, fixed shaft seat 2, hinge shaft 3, stacked clip 4, center column profile 5, door leaf profile 6, installation notches 51, 61, sealing strip 8, door leaf glass 9, sleeve 11, connecting block 11a, clamping groove 12, inner sleeve 13, gap adjustment hole 14, gap adjustment screw 15, connecting screw hole 16, connecting screw 17, leaf piece mounting hole 18, locking screw 19, split clip 2a, bayonet 2b, locking screw hole 21, slot 22, radial locking screw 23, locking screw hole 24, tightening hole 25, tightening screw 26, mounting screw 27, ring groove 31. DETAILED DESCRIPTION

[0047] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0048] Reference Figures 3 to 15 As shown, a door hinge comprises a hinge piece 1, a hinge shaft 3, and a stacked clip 4. The hinge piece 1 is provided with a shaft sleeve 11. The hinge piece 1 and the stacked clip 4 are connected to form a whole by connecting screws 17. The hinge shaft 3 is passed through the shaft sleeve 11. Fixed shaft seats 2 are respectively provided at both ends of the hinge shaft 3 to form a rotatable connection. The fixed shaft seat 2 is provided with a locking screw hole 21, and is fixedly connected to the profile through the locking screw hole 21.

[0049] A leaf mounting hole 18 is provided between the hinge piece 1 and the laminated clip piece 4, and clamping grooves 12 are formed on both sides. During installation, the hinge piece 1 and the laminated clip piece 4 are connected as one, and the free outer end of the clamping groove of the buckle profile is clamped by the clamping groove clamp 12, and the hinge piece 1 and the laminated clip piece 4 connected as one are connected to the profile by the mounting screws in the leaf mounting hole 18.

[0050] A clamping groove 22 is arranged on both sides of the fixed shaft seat 2. During installation, the fixed shaft seat 2 is installed in the clamping groove 22 of the aluminum profile, and then the free outer end of the clamping groove of the buckle profile is positioned through the clamping groove 22.

[0051] An annular groove 31 is provided at both ends of the hinge shaft 3, and the fixed shaft seat 2 is provided with a radial locking screw 23 positioned in the annular groove 31. The radial locking screw 23 is positioned in the annular groove 31, so that the fixed shaft seat 2 and the hinge shaft 3 are rotatably connected.

[0052] The shaft sleeve 11 includes a connecting block 11a connected to the hinge piece 1. The connecting block 11a extends in a connected manner with the hinge piece 1, and a vertical shaft hole of the shaft sleeve 11 is formed by extending outward through the connecting block 11a and the free outer end, so that the hinge piece 1 and the mounting surface of the fixed shaft seat 2 are offset, and the hinge shaft 3 is inserted and positioned in the shaft hole.

[0053] The two ends of the shaft hole of the shaft sleeve 11 are provided with inner sleeves 13 which are symmetrical in the up-down direction. The inner sleeve 13 is arranged between the hinge shaft 3 and the shaft sleeve 11, and the inner sleeve 13 rotates on the hinge shaft 13.

[0054] The fixed shaft seat 2 is provided with a tightening hole 25, the tightening hole 25 is provided with a tightening screw 26, and the locking screw hole 21 is provided with a mounting screw 27. The tightening screw 26 passes through the fixed shaft seat 2, and the end face abuts against the profile to fine-tune the angle of the mounting surface.

[0055] The hinge piece 1 is provided with a gap adjustment hole 14, and a gap adjustment screw 15 is provided in the gap adjustment hole 14. The inner end surface of the gap adjustment screw 15 abuts against the stacked clip 4, and cooperates with the connecting screw 17 to adjust the gap between the hinge piece 1 and the stacked clip 4, and fine-tune the angle of the hinge piece installation surface.

[0056] The connecting block 11a is arc-shaped. The arc-shaped connecting block 11a causes the hinge piece 1 to be offset with the fixed shaft seat 2, and the hinge piece 1 can be opened and closed at a large angle so that the outer surface of the hinge piece 1 and the inner surface of the fixed shaft seat 2 can be offset to be flush with each other, so that the hinge piece 1 can directly rotate around the fixed shaft seat 2 and the hinge shaft 3.

[0057] The locking screw hole 21 and / or the tightening hole 25 of the fixed shaft seat 2 lead to the card slot 22. The locking screw hole 21 or the tightening hole 25 communicates with the card slot 22. When the fixed shaft seat is installed, the screw in the locking screw hole 21 penetrates the aluminum profile in the card slot 22 and is locked to fix the fixed shaft seat 2. The inner end of the tightening screw 26 in the tightening hole 25 abuts against the aluminum profile in the card slot and is locked to achieve the installation of the fixed shaft seat 2. The tightening screw 26 fine-adjusts the installation surface of the fixed shaft seat 2.

[0058] The hinge piece 1 is provided with a connecting screw hole 16 , and a connecting screw 17 is connected in the connecting screw hole 16 for connecting the hinge piece 1 and the stacked clip 4 .

[0059] The back of the fixed shaft seat 2 is provided with a locking screw hole 24, and the radial locking screw 23 is screwed into the locking screw hole 24. Figure 6 and Figure 7 shown.

[0060] like Figures 9 to 12 As shown, another embodiment of the utility model, wherein the fixed shaft seat 2 is respectively stacked with split clips 2a, which are connected by connecting screws 17, and the two sides form a card slot 22. The internal fixed shaft seat 2 is provided with a fixed shaft seat structure that is independently fixed up and down, and an independent split clip 2a is provided, which is connected by connecting screws 17 to achieve a conjoined combination, and when connected as one, the free outer end of the card slot of the buckle profile is clamped by the card slot 22, and the fixed shaft seat 2 and the split clip 2a connected as one are connected to the profile by the mounting screws in the locking screw hole 21.

[0061] like Figures 13 to 15 As shown, another embodiment of the utility model is provided, wherein the fixed shaft seat 2 is provided with a bayonet 2b, which is positioned with the profile groove through the bayonet 2b.

[0062] Reference Figures 3 to 25 As shown, a folding door and window structure includes a center column profile 5 and a door leaf profile 6, and the center column profile 5 and the door leaf profile 6 are hinged by the above-mentioned door hinge 1a.

[0063] like Figures 16 to 19 As shown, different embodiments of the door hinge 1a are respectively arranged on the center column profile 5 and the door leaf profile 6, which has the characteristic of flexible use. The fixed shaft seat 2 and the leaf 1 are respectively installed on the center column profile 5 and the door leaf profile 6.

[0064] like Fig.17 As shown, the structure of the center column profile 5 and the door leaf profile 6, wherein the installation slots are respectively arranged near the inner corners of the center column profile 5 and the door leaf profile 6. During installation, the fixed shaft seat 2 is first inserted into the installation slot 51 of the center column profile 5, and is locked and fixed to the installation slot 51 of the center column profile 5 at the designed installation position by means of the installation screws 27. Then the door leaf is installed, the stacked clip 4 is inserted into the installation slot 61 of the door leaf profile 6, and then the hinge piece 1 is connected to the stacked clip 4 by means of the connecting screws 17, and the clamping grooves 12 are formed on both sides between the stacked clip 4 and the hinge piece 1 to clamp the slots of the installation slot 61, and then the mounting slots 61 of the door leaf profile 6 are locked and fixed by means of the locking screws 19.

[0065] The center column profile 5 and the door leaf profile 6 are provided with sealing strips 8 that cooperate with each other.

[0066] like Fig.16 and Fig.17 As shown, the leaf piece 1 is installed on the door leaf profile 6, and the fixed shaft seat 2 is installed on the center column profile 5. When the door leaf glass 9 is opened and closed, the door leaf glass 9 and the door leaf profile 6 drive the leaf piece 1 to rotate around the hinge shaft 3.

[0067] like Fig.18 and Fig.19As shown, the leaf piece 1 is installed on the center column profile 5, and the fixed shaft seat 2 is installed on the door leaf profile 6. When the door leaf glass is opened and closed, the door leaf glass 9 and the door leaf profile 6 drive the fixed shaft seat 2 and the hinge shaft 3 to rotate.

[0068] By arranging upper and lower independent fixed shaft seats 2, the door hinge 1a will not cause the concave-shaped leaf piece to be stressed during use. The fixed shaft seats 2 at both ends of the hinge shaft are used to support the hinge shaft 3 and connect the profile, which solves the defect of the load-bearing center of gravity shifting when the middle part of the existing hinge is cut out in a concave shape, so that the center of gravity of the hinge is completely concentrated on the fixed shaft seats at both ends of the hinge, thereby reducing the stress on the hinge piece and reducing the risk of hinge breakage during long-term use.

[0069] In summary, the utility model has been made into actual samples and tested for multiple times as described in the specification and the illustrations. From the results of the test, it can be proved that the utility model can achieve its intended purpose, and its practical value is beyond doubt. The above embodiments are only used to illustrate the utility model, and are not intended to limit the utility model in any form. Any person with ordinary knowledge in the technical field can make equivalent embodiments that are partially changed or modified by the technical content disclosed in the utility model without departing from the scope of the technical features of the utility model, and they still fall within the scope of the technical features of the utility model without departing from the technical features of the utility model.

Claims

1. A door hinge, comprising a hinge piece (1), a hinge shaft (3), and a laminated clip (4), wherein the hinge piece (1) is provided with a shaft sleeve (11), and the hinge piece (1) and the laminated clip (4) are connected by connecting screws (17), characterized in that: The hinge shaft (3) is inserted into the shaft sleeve (11), and fixed shaft seats (2) are respectively arranged at both ends, and locking screw holes (21) are arranged on the fixed shaft seats (2).

2. The door hinge according to claim 1, characterized in that: A leaf piece mounting hole (18) is provided between the hinge piece (1) and the stacked clamping piece (4), and clamping grooves (12) are formed on both sides.

3. The door hinge according to claim 1, characterized in that: The fixed shaft seat (2) is provided with clamping grooves (22) on both sides.

4. The door hinge according to claim 1, characterized in that: Both ends of the hinge shaft (3) are provided with annular grooves (31), and the fixed shaft seat (2) is provided with radial locking screws (23) positioned in the annular grooves (31).

5. The door hinge according to claim 1, characterized in that: The shaft sleeve (11) comprises a connecting block (11a) connected to the hinge piece (1).

6. The door hinge according to claim 1, characterized in that: Inner bushings (13) are provided at both ends of the shaft hole of the shaft sleeve (11).

7. The door hinge according to claim 1 or 3, characterized in that: The fixed shaft seat (2) is provided with a tightening hole (25), the tightening hole (25) is provided with a tightening screw (26), and the locking screw hole (21) is provided with a mounting screw (27).

8. The door hinge according to claim 1, characterized in that: The hinge piece (1) is provided with a gap adjustment hole (14), and a gap adjustment screw (15) is provided in the gap adjustment hole (14).

9. The door hinge according to claim 1 or 3, characterized in that: The fixed shaft seat (2) is respectively provided with split clips (2a) stacked on top of each other, which are connected by connecting screws (17) and have slots (22) formed on both sides.

10. The door hinge according to claim 5, characterized in that: The connecting block (11a) is arc-shaped.

11. The door hinge according to claim 7, characterized in that: The locking screw hole (21) and / or the tightening hole (25) of the fixed shaft seat (2) lead to the clamping groove (22).

12. A folding door and window structure, characterized in that: It comprises a center column profile (5) and a door leaf profile (6), wherein the center column profile (5) and the door leaf profile (6) are hingedly connected via a door hinge (1a) as described in any one of claims 1 to 11.

13. The folding door and window structure according to claim 12, characterized in that: The fixed shaft seat (2) is fixed to the mounting notch (7) of the center column profile (5) or the door leaf profile (6) by means of mounting screws (27), and the hinge piece (1) is fixed to the mounting notch (7) of the door leaf profile (6) or the center column profile (5) by means of locking screws (19).

14. The folding door and window structure according to claim 13, characterized in that: The center column profile (5) and the door leaf profile (6) are provided with sealing strips (8) that cooperate with each other.

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