Hinge, hinge cover and anti-sag door

Abstract

The present application relates to a kind of hinges, including upper hinge and lower hinge connected by pivot, lower hinge is connected with first fixed seat, first fixed seat has corresponding with upper hinge matching accommodation recess;A hinge sleeve, hinge sleeve is set to the outer end of upper hinge or lower hinge, hinge sleeve includes shaft sleeve and lock key;A kind of anti-sag door, including door frame, door leaf and hinge, hinge includes upper hinge and lower hinge connected by pivot, lower hinge is connected with first fixed seat, upper hinge is connected with second fixed seat, first fixed seat is connected with the side and top blocking rib / bottom blocking rib of door frame / door leaf simultaneously, second fixed seat is connected with the side and top blocking rib / bottom blocking rib of door leaf simultaneously.The present application provides a kind of hinge and anti-sag door, the hinge of the present application can effectively resolve the problem of door leaf rebound when door leaf appears forming error, the anti-sag door of the present application is simple in structure, connection is stable, good reliability, strong practicality.

Description

TECHNICAL FIELD

[0001] The present application relates to the hinge and door technical field, and particularly to a hinge, a hinge sleeve and an anti-sagging door. BACKGROUND

[0002] Hinge, also known as hinge, is a mechanical device used to connect two solids and allow relative rotation between the two.

[0003] In the prior art, in order to improve the sealing effect of the metal door process, the existing metal door manufacturing process has high requirements for the inner space size of the door frame, the height and width of the door leaf forming, and the angle of the door leaf forming. The existing technology is not easy to meet the standard requirements, resulting in problems such as sagging of the door leaf, rebounding of the door leaf, exposed door gap, and different sizes of the door gap. In order to solve the above problems, the applicant innovatively develops a hinge used in a metal door process with double sealing inside and outside the door leaf.

[0004] The existing metal door process structure mainly uses single sealing process (the hinge connection position of the door leaf and the door frame, the hinge connection position of the door leaf and the door leaf, only one side has a cover edge to cover the door gap, and the other side is a clear gap). For example, in a four-door, the height and width of a single door leaf are standard with a positive or negative difference of 1mm, and the angle of the door leaf forming (hinge side) is standard with a perpendicular of 90 degrees. However, it is difficult to meet all the standard requirements in the existing technology process production, resulting in large gaps in the clear gap part when the height and width of the door leaf forming are small, affecting the appearance and showing the rough gap. When the door leaf forming size is large, friction occurs when the door leaf is closed, causing rebounding or inability to close. When the door leaf forming angle deviates, the door leaf rebounds, affecting the closing or inability to close of the door leaf. Among them, the most important thing is that the area of the four-door leaf is generally large and the weight is heavy, which causes the existing hinge to have poor effect in supporting the weight of the door leaf, resulting in sagging after long-term use. The existing hinge cannot solve the problem of door leaf rebounding caused by the deviation of the door leaf forming size and the angle of the door leaf forming. Therefore, the applicant adjusts the size of the hinge, including the thickness (the existing hinge plate thickness is about 3mm), to improve the stability of the hinge structure and the load capacity, and to solve the gap between the door leaf angle error and the cooperation between the door gap cover edge and the door leaf. The effect of non-rebound is achieved, and the positioning and adjustment function of the hinge inside and outside is increased to improve the convenience and accuracy of the worker operation.

[0005] At present, there are various types of entrance doors (also known as security doors) on the market, which are mainly made of metal materials or metal composite materials, including pure steel entrance doors, stainless steel doors, armored doors, etc.

[0006] With the development of social economy and the improvement of people's income and living standards, the existing rural houses are generally built larger and larger, and the doors installed are also larger and larger. These doors have the common characteristics of large size and heavy weight, especially the entrance door, which is not only an image display but also a safety protection.

[0007] In the prior art, in order to improve the sealing effect of the metal door, the existing metal door manufacturing process has very high requirements for the size of the inner space of the door frame, the forming height of the door leaf, and the forming angle of the door leaf. However, the current production technology is difficult to meet the requirements, so in the actual production process, problems such as door leaf sagging, door leaf rebounding, door gap exposure, and uneven door gap often occur.

[0008] Taking a four-door as an example, the forming height and width of a single door leaf are within a standard error of plus or minus 1mm, and the forming angle of the hinge side is perpendicular to 90 degrees. It is difficult for the existing technology to meet all the requirements when processing and producing metal doors. When the forming width of the door leaf is small, the gap at the miter joint is large, affecting the appearance and making it look rough. When the forming size of the door leaf is large, the door leaf may rub, rebound, or fail to close when closing. When the forming angle of the door leaf deviates, the door may rebound, affecting the closing of the door or making it impossible to close.

[0009] The most critical point is that metal doors are generally large in size and heavy in weight. On the one hand, existing hinges cannot support the weight of the door leaf to prevent sagging over a long period of time. On the other hand, the forming structure of the door leaf and its stability are not good, which may cause the door to deform after long-term use. This is a common problem in the market that needs to be solved urgently.

[0010] Therefore, the applicant has innovatively developed the anti-sagging door of the present application, which improves the strength of the thickened hinge, the structural strength of the door leaf, and the connection stability, including the structure and connection of the door frame, and innovatively solves the problem of metal door deformation and sagging.

[0011] In addition, the existing metal door process structure mainly uses single-seal technology. The hinge connection position of the door leaf and the door frame and the hinge connection position of the door leaf and the door leaf only have one side covered with a cover to cover the door gap, and the other side is a miter joint, which affects the appearance and sound insulation and dustproof effect. The applicant innovates the structure of the thickened hinge to realize double-covering of the door gap on both the inside and outside of the door. SUMMARY

[0012] The purpose of the present application is to overcome the shortcomings of the prior art and provide a hinge, a hinge sleeve, and an anti-sagging door. The hinge has good stability, is easy to adjust, and can effectively solve the problem of door leaf rebounding caused by forming errors in the door leaf, thereby reducing the difficulty of production and processing, reducing waste, improving efficiency, and improving the perfection of metal doors. The anti-sagging door of the present application has a simple structure, stable connection, good reliability, and strong practicality.

[0013] The present application is realized by the following technical solutions:

[0014] A hinge, comprising an upper hinge and a lower hinge connected by a rotating shaft, the upper hinge and the lower hinge each comprising a fixed part and a shaft connecting part, the fixed part of the upper hinge having a folded edge part on one side, the folded edge part being connected to the shaft connecting part by a connecting part, the lower hinge being connected with a first fixing seat, the first fixing seat having a clearance groove corresponding to the upper hinge.

[0015] In order to further realize the present application, the following technical solutions can be preferred:

[0016] Preferably, the first fixing seat comprises a box body, the box body being a cuboid shell, the adjacent two sides of the box body having clearance grooves, the fixed part, the folded edge part and the connecting part of the upper hinge always having a certain fitting gap with the lower hinge and the first fixing seat when the upper hinge is fitted with the clearance grooves.

[0017] Preferably, an adjusting clamp is arranged in the box body and is locked with the lower hinge, the adjusting clamp being threadedly connected with a clamping bolt penetrating through the first fixing seat, both ends of the clamping bolt being rotatable.

[0018] A hinge sleeve for a hinge, the hinge sleeve being arranged at the outer end of the upper hinge or the lower hinge;

[0019] The hinge sleeve comprises a sleeve and a lock key, the sleeve being tubular, the circumferential side wall of the sleeve being provided with a slit along the axial direction of the sleeve, the sleeve being slidingly fitted on the shaft connecting part of the upper hinge or the lower hinge, the connecting part of the upper hinge or the lower hinge being located in the slit of the sleeve, the lock key being slidingly fitted in the slit of the sleeve along the axial direction of the sleeve, the lock key being connected with the sleeve on both sides, one end of the lock key extending into the slit of the sleeve abutting against the shaft connecting part.

[0020] Preferably, the inner wall of the sleeve is provided with a locking groove, the locking groove being arranged in parallel with the slit, two locking grooves being arranged on both sides of the slit respectively, the lock key being provided with a locking strip corresponding to the locking groove on both sides, the locking strip being slidingly fitted in the locking groove.

[0021] Preferably, the hinge sleeve further comprises a plug, the plug being fixedly fitted in the sleeve, the circumferential side surface of the plug abutting the lock key to the sleeve;

[0022] The lock key and the plug are separately arranged or integrally formed.

[0023] A sag-resistant door, comprising a door frame, a door leaf and a hinge, the hinge comprising an upper hinge and a lower hinge connected by a rotating shaft, the lower hinge being connected with a first fixing seat, the upper hinge being connected with a second fixing seat, the first fixing seat being simultaneously connected with the side and top blocking ribs / bottom blocking ribs of the door frame / door leaf, the second fixing seat being simultaneously connected with the side and top blocking ribs / bottom blocking ribs of the door leaf.

[0024] Preferably, the upper hinge is connected with a second fixing base, and the second fixing base is provided with a movable plate.

[0025] Preferably, the first fixing base is provided with a side lug.

[0026] Preferably, the second fixing base is provided with a diagonal support and / or a side lug.

[0027] Through the above technical solutions, the application has the following beneficial effects:

[0028] 1. The hinge can be sunk into the recess through the cooperation between the recess and the upper hinge, and the recess and the hinge form a cooperation, so that the door leaf does not rebound when the forming angle has an error, and the problem that the thickness of the upper hinge bending part affects the cooperation gap between the cover edge and the door leaf is solved.

[0029] 2. The hinge has the characteristics of strong bearing and long service life, and the cooperation gap between the door leaf cover edge and the adjacent door leaf is more perfect through the control of the height size of the connecting part and the thickness of the hinge.

[0030] 3. The cooperation gap between the door leaf and the door frame is quickly and accurately locked through the clamping plate bolt avoiding hole on the fixing base, and both ends can be operated, which greatly improves the worker's assembly and debugging efficiency.

[0031] 4. The second fixing base with a side lug and a diagonal support connects the hinge edge of the door leaf with the upper and lower blocking ribs of the door leaf, forming a triangular stable structure, and the stable thickened hinge structure realizes that the door leaf does not sag for a long time.

[0032] 5. The hinge sleeve can be detachably sleeved on the shaft connecting part of the hinge, which is convenient for replacing the shape of the hinge and reducing the production cost.

[0033] 6. The anti-sagging door has reasonable connection structure design, high structural strength and good stability, which can effectively reduce and avoid the common situation that the metal door is deformed and sagged due to gravity, and the hinge is not only thickened, but also has reasonable structure design, and cooperates with the door gap cover edge, which is multi-dimensional adjustable, reduces the production and assembly process difficulty, solves the problem of high maintenance rate and scrap rate caused by large forming size error of the door leaf, and has double cover edges, good sound insulation, dust prevention and sealing effect, and is beautiful and practical, and has good use effect, and is worth widely popularizing and using. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a structural schematic diagram of the present application;

[0035] Figure 2 is a sectional structural schematic diagram of the present application;

[0036] Figure 3 is a three-dimensional structural schematic diagram of the upper and lower hinges of the present application;

[0037] Figure 4 is an exploded structural schematic diagram of the present application;

[0038] Figure 5 is a structural schematic diagram of the second fixing base of the present application;

[0039] Figure 6 is a three-dimensional structural schematic diagram of the second fixing base of the present application;

[0040] Figure 7 is a structural schematic diagram of another second fixing base of the present application in the mounted state.

[0041] Figure 8 is a structural schematic diagram of the hinge sleeve of the present application;

[0042] Figure 9 is a structural schematic diagram of the shaft sleeve of the present application;

[0043] Figure 10 is a structural schematic diagram of the lock key of the present application;

[0044] Figure 11 is a whole plan view structural schematic diagram of the four-leaf door of the anti-sagging door of the present application;

[0045] Figure 12 is a side view structural schematic diagram of the anti-sagging door of the present application;

[0046] Figure 13 is a plan view structural schematic diagram of the anti-sagging door of the present application;

[0047] Figure 14 is a structural schematic diagram of the inner and outer panel of each door leaf in a split body;

[0048] Figure 15 is a connection structural schematic diagram of the side door leaf and the main / auxiliary door leaf in a closed state;

[0049] Figure 16 is a connection structural schematic diagram of the side door leaf and the main / auxiliary door leaf in a closed state;

[0050] Figure 17 is a right view of the present application; Figure 16 DETAILED DESCRIPTION

[0051] ​In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0053] Referring to Figures 1-4 A hinge, comprising an upper hinge 1 and a lower hinge 2 connected by a rotating shaft, the lower hinge 2 is connected with a first fixed seat 3, the first fixed seat 3 comprises a box body 4, the box body 4 is provided with a clearance groove 5 corresponding to the upper hinge 1 on two adjacent sides, when the upper hinge 1 is matched with the clearance groove 5, the bottom surface of the clearance groove 5 and the corresponding surface of the upper hinge 1 have a certain matching gap d1, so that by matching the clearance groove 5 with the upper hinge 1, the corresponding surface of the upper hinge 1 is placed in the clearance groove 5 under the matching gap d1, so that the upper hinge 1 does not collide with the first fixed seat 3 when it is parallel to the first fixed seat 3, and the phenomenon of rebound of the upper hinge 1 when closing the door leaf is avoided.

[0054] The hinge is a thickened hinge, the thickness of the upper hinge 1 and the lower hinge 2 is 5-10mm, and in the embodiment, the thickness of the upper hinge 1 and the lower hinge 2 is 8mm. The upper hinge 1 includes a fixed part 101 and a shaft connecting part 104, the fixed part 101 has a folding edge part 102 on one side, the folding edge part 102 is connected with the shaft connecting part 104 through a connecting part 103, and in the embodiment, the shaft connecting part 104 is a shaft sleeve which is sleeved on the rotating shaft of the lower hinge 1. When the upper hinge 1 cooperates with the giving recess 5, the fixed part 101, the folding edge part 102 and the connecting part 103 of the upper hinge 1 always have a certain cooperation gap d1 with the lower hinge 2 and the first fixed seat 3. At the same time, through many actual verifications, when the height size of the connecting part 103 is 3-8mm, the folding edge part 102 of the upper hinge 1 can be effectively sunk into the giving recess 5, and the cover edge of the door leaf not only overlaps the folding edge part 102 of the upper hinge, but also overlaps and cooperates compactly with the adjacent door leaf (the lower hinge 2 is installed on the door leaf), so that the overlapping sealing effect of the cover edge of the door gap in the closed state of the door is improved. In the embodiment, the height size of the connecting part 103 is 5mm, and the height size of the connecting part 103 refers to the vertical height size between the folding edge part 102 and the shaft connecting part 104.

[0055] The box body 4 is provided with an adjusting clamp plate 6 connected with the lower hinge 2, the adjusting clamp plate 6 is threadedly connected with a clamping bolt 7 penetrating through the first fixed seat 3, both ends of the clamping bolt 7 can be operated to rotate, so that the door leaf can be put into the door frame, and then the door frame outside is adjusted. In the embodiment, one end of the clamping bolt 7 is an inner hexagonal structure, and the other end is a welded nut. The bottom surface of the giving recess 5 of the first fixed seat 3 has a giving hole corresponding to the clamping bolt 7. The two ends of the adjusting clamp plate 6 are connected with the two side surfaces of the first fixed seat 3 through the threadedly connected adjusting bolts 8, the adjusting bolts 8 are slidingly and rotatably connected with the two side surfaces of the first fixed seat 3, so that the left and right positions and angles of the hinge clamp plate 6 and the clamped lower hinge 2 are adjusted through the adjusting bolts 8, the size of the door gap is adjusted, and the adjustment of the incorrect installation angle of the first fixed seat 3 is overcome. In addition, preferably, the adjusting clamp plate 6 is provided with a positioning mark 601 on the upper clamp plate, the positioning mark 601 of the embodiment is a notch structure punched on the upper clamp plate, and can also be a mark line, which facilitates the height positioning reference during the installation of the lower hinge, and improves the efficiency of the workers during assembly and debugging.

[0056] In the embodiment, the rotation connection of the upper hinge 1 and the lower hinge 2 makes the recess 5 cooperate with the upper hinge 1, and the corresponding surface of the upper hinge 1 is placed in the recess 5 under the cooperation gap d1, so that when the corresponding surface is inclined, the upper hinge 1 does not rebound when closing the door leaf through the recess 5 and the cooperation gap d1, thereby solving the problem that the hinge edge of the existing metal door is difficult to guarantee 90 degrees, and the corresponding surface is inclined to cause rebound. Meanwhile, the hinge has the characteristics of strong bearing and long service life when the thickness increases, and under the range of height dimension values and hinge thickness values of the connection part, the cooperation edge part of the upper hinge 1 is sunk to the depth of the recess 5 to solve the cooperation gap between the cover edge and the door leaf, and the thickness problem of the upper hinge fold edge part 102 cannot solve the cooperation gap between the cover edge and the door leaf when the cover edge contacts the door leaf. The adjusting clamp 6 is convenient for adjusting the cooperation position of the hinge and the door leaf, and is convenient for workers to assemble and debug.

[0057] Referring to Figure 1 and 4 , the first fixed seat 3 is provided with corresponding control holes 9 at both ends, and the corresponding control holes 9 penetrate through the first fixed seat 3, so that the control holes 9 cooperate with the control shafts arranged in the door leaf to achieve the purpose of avoiding the control bolt.

[0058] As a preferred scheme, referring to Figure 5 and 6The second fixing base 10 in the embodiment is a lining plate structure, which comprises a fixed plate 1001 and a movable plate 1002. The fixed plate 1001 is connected with the movable plate 1002 through bolts. Specifically, a long strip sliding hole 1011 is formed on the fixed plate 1001, and a threaded hole 1021 corresponding to the long strip sliding hole 1011 is formed on the movable plate 1002. A sliding groove and a sliding block matched with each other are further arranged between the fixed plate 1001 and the movable plate 1002, so that the movable plate 1002 can be effectively prevented from tilting or overturning relative to the fixed plate 1001. In the embodiment, a sliding groove 1012 is formed on the fixed plate 1001, and a sliding block 1022 matched with the sliding groove 1012 is arranged on the movable plate 1002. The length direction of the sliding groove 1012 and the long strip sliding hole 1011 is arranged along the width direction of the second fixing base 10. A bolt 1005 is previously arranged in one of the long strip sliding holes 1011 on the fixed plate 1001 and connected with the corresponding threaded hole on the movable plate 1002. After the door leaf is assembled and shaped, the movable plate 1002 is adjusted so that the threaded hole 1021 is matched with the bolt hole on the upper hinge 1. Then, the upper hinge 1 can be externally installed and fixed on the door leaf.

[0059] Meanwhile, a bolt-connected inclined pull supporting piece 1004 is arranged between the side lug 1003 and the movable plate 1002. The inclined pull supporting piece 1004 is first connected and fixed with the side lug 1003, and then is pulled and fixed through the bolt 1005. The inclined pull supporting piece 1004 is supported in an inclined manner between the plug rib surface and the hinge edge, so as to form a triangular stable structure, further improve the structural strength of the door leaf, and avoid deformation and sagging. During use and assembly, the upper end of the inclined pull supporting piece 1004 is first fixed with the side lug 1003. After the inner and outer panels of the door leaf are buckled and shaped, the side lug 1003 is welded and fixedly connected with the top plug rib / bottom plug rib. The plug rib of the door leaf is provided with a reserved welding hole. Then, the hinge is installed on the corresponding hinge edge of the door leaf, and the lower end of the inclined pull supporting piece 1004 is pulled and locked through the bolt 1005, so as to realize the installation and fixation of the structure.

[0060] As another preferred scheme, referring to Figure 7For another embodiment of the second fixed seat 10, the second fixed seat 10 is a box structure, the box 1006 is provided with a notch corresponding to the upper hinge 1 on one side, the door leaf hinge edge 11 is provided with a corresponding opening, the other side of the box 1006 is provided with a movable plate 1002, the hinge leaf of the upper hinge 1 is sunk into the box 1006 and connected with the movable plate 1002, one end of the box 1006 is provided with a side lug 1003, the side lug 1003 is connected with the door leaf blocking rib 12, and at the same time is connected with the movable plate 1002 through the inclined pull supporting piece 1004, the inclined pull supporting piece 1004 is pulled tightly and fixed through the bolt 1005, forming a triangular stable structure, the embodiment scheme can sink the upper hinge 1 into the box 1006, reducing the gap between the door leaf and the door frame and the door leaf and the door leaf, especially the thickened hinge, which can reduce or avoid the upper groove and the matching gap on the other hinge piece fixed seat.

[0061] As another preferred scheme, the hinge sleeve is arranged at the outer end of the upper hinge or the lower hinge;

[0062] Referring to Figures 8-10 , the hinge sleeve comprises a sleeve 301, a lock key 302 and a plug 303, the sleeve is tubular, a slit is arranged on the circumferential side wall of the sleeve along the axial direction of the sleeve, the sleeve is slidably sleeved on the shaft connecting part of the upper hinge or the lower hinge, the connecting part of the upper hinge or the lower hinge is located in the slit of the sleeve, the lock key is slidably embedded in the slit of the sleeve along the axial direction of the sleeve, the lock key is connected with the sleeve on both sides, and the end of the lock key extending into the slit of the sleeve abuts against the shaft connecting part, and the plug is fixedly embedded in the sleeve, and the circumferential side surface of the plug abuts the lock key to the sleeve.

[0063] Preferably, a locking groove is arranged on the inner wall of the sleeve, the locking groove is arranged in parallel with the slit, and two locking grooves are arranged on both sides of the slit respectively, locking strips corresponding to the locking grooves are arranged on both sides of the lock key, and the locking strips are slidably embedded in the locking grooves;

[0064] The cross sections of the locking groove and the locking strip are both trapezoidal.

[0065] Preferably, the lock key and the plug are integrally formed.

[0066] Working principle: the hinge adopts a thickened structure, the first fixed seat 3 is used to lock the lower hinge 2 to improve the force support of the door frame and the door leaf, the first fixed seat 3 is used to realize clamping of the lower hinge 2 through the adjusting clamp plate 6 and the clamping bolt 7, and the lower hinge 2 is moved left and right through the adjusting bolt 8 to complete the size adjustment of the door gap, the upper hinge 1 is connected with the door leaf through the second fixed seat 10, the rebound caused by the angle error of the door leaf and the problem that the thickness of the folding edge part 102 of the upper hinge 1 occupies the gap between the cover edge and the door leaf are solved through the cooperation gap d1 between the let-in groove 5 and the upper hinge 1, and the purpose of no rebound when the door leaf is closed is achieved.

[0067] While the embodiments of the application have been shown and described, it is to be understood that the application is not limited to these embodiments. It is to be understood that various changes in form and details can be made without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

[0068] Referring to Figures 11-12 , the embodiment illustrates a metal door with double sealing edges on the inside and outside of the door leaf.

[0069] The double sealing edges on the inside and outside mean that the door leaf is covered on both the inside and outside by sealing edges at the positions where the door leaf is connected to the hinge of the door frame and the hinge of the door leaf.

[0070] Referring to Figure 11 , the metal door is a four-leaf door structure (inside right opening), which includes two main and auxiliary door leaves 400, 300 in the middle and two side door leaves 500, 200 connected to the main and auxiliary door leaves 400, 300 through hinges 600, respectively, and the two side door leaves 500, 200 are connected to the door frame 100 through hinges 600, respectively.

[0071] Referring to Figure 11 and 12 , the hinges 600 are arranged at the top and bottom of the connection side of the door frame 100 and the side door leaves 500, 200, the connection side of the main door leaf 400 and the side door leaf 500, and the connection side of the auxiliary door leaf 300 and the side door leaf 200, or near the top or bottom, referring to Figure 3 , the hinge 600 includes an upper hinge 1 and a lower hinge 2 connected through a rotating shaft, referring to Figure 12 , the lower hinge 2 is connected with a first fixed seat 3, and the upper hinge 1 is connected with a second fixed seat 10, the first fixed seat 3 is connected with the side and top blocking ribs / bottom blocking ribs of the door frame / door leaf at the same time, and the second fixed seat 10 is connected with the side and top blocking ribs / bottom blocking ribs of the door leaf at the same time. Specifically, the first fixed seat 3 is installed on the door frame 100 and the side connected to the corresponding main and auxiliary door leaves of the side door leaf, and the second fixed seat 10 is arranged on the side connected to the door frame of the side door leaf and the side connected to the corresponding side door leaf of the two main and auxiliary door leaves.

[0072] The hinge is a thickened hinge, the thickness of the upper hinge and the lower hinge is 5-10mm, the thickness of the hinge in the embodiment is 8mm, the load capacity can effectively meet the weight of most metal doors on the market, the thickened hinge of the size effectively enhances the load capacity of the hinge, plays a stable and reliable supporting role for the door leaf, and avoids the problems of difficult processing and large product size caused by excessive thickness. The upper hinge 1 includes a fixed part 101 and a shaft connecting part 104, the fixed part 101 has a folding edge part 102 on one side, the folding edge part 102 is connected with the shaft connecting part 104 through a connecting part 103, the shaft connecting part 104 of the upper hinge 1 is a sleeve structure, which is sleeved on the rotating shaft of the lower hinge 2, the height of the connecting part 103 is 3-8mm, and the height of the connecting part 103 in the embodiment is 5mm. The first fixed seat 3 has a let-in recess 5 corresponding to the fixed part 101 and the folding edge part 102 of the upper hinge 1, when the upper hinge 1 cooperates with the let-in recess 5, the top surface of the folding edge part 102 of the upper hinge 1 is basically flush with the outer surface of the hinge rotating shaft of the first fixed seat 3, so that the cover edge 700 cooperating with the folding edge part 102 can be well sealed with the adjacent door leaf or door frame through the sealing strip 1000, and the depth of the folding edge part 102 sinking into the let-in recess 5 is controlled through the size control of the connecting part 103, so that the cooperation gap between the door leaf cover edge and the adjacent door leaf reaches the best; in addition, the outer side surface of the fixed part 101 of the upper hinge 1 is basically flush with the outer side surface of the first fixed seat 3, which can effectively reduce the gap between the side door leaf 500, 200 and the door frame 100, and the gap between the main door leaf 400, 300 and the side door leaf 500, 200, so that the cooperation is compact and tight. There is always a certain cooperation gap between the bottom surface of the let-in recess 5 and the corresponding surface of the upper hinge 1, which can effectively avoid the rebound of the door, even if the forming angle of the door leaf or the safety of the first fixed seat 3 is slightly deviated and inclined, the rebound of the door will not be caused, the production and processing process difficulty can be effectively reduced, and the scrap rate can be reduced.

[0073] The first fixed seat 3 and / or the second fixed seat 10 are box body structures, and both can adopt the box body structure, facilitating the cooperation of the top surface or the bottom edge of the box body with the side surface of the box body, and the reliable connection with the side surface and the top surface or the bottom surface of the door frame 100 and the door leaf. In the embodiment, the first fixed seat 3 is a box body structure, and a hinge clamping plate 6 is arranged in the first fixed seat 3. The hinge clamping plate 6 is threadedly connected with a clamping bolt 7 penetrating through the first fixed seat 3. A relief hole corresponding to the clamping bolt 7 is arranged on the bottom plate of the relief groove 5 and the upper hinge 1. The clamping bolt 7 can be operated and rotated at both ends, realizing the rotation adjustment of both ends. In particular, when the door leaf is positioned in the door frame 100, the door leaf can be placed in the door frame 100, and the clamping bolt 7 can be rotated outside the door frame 100, realizing the clamping and fixing of the corresponding lower hinge 2, so that the operation of the worker is more convenient and fast. The hinge clamping plate 6 is connected with the two side surfaces of the box body of the first fixed seat 3 through the thread connection of the adjusting bolt 8 at both ends. The adjusting bolt 8 is slidingly and rotatably connected with the two side surfaces of the box body, so as to realize the adjustment of the left and right positions and the angle of the hinge clamping plate 6 and the clamping lower hinge 2 by the adjusting bolt 8, realizing the adjustment of the size of the door gap and overcoming the adjustment of the incorrect installation angle of the fixed seat. The hinge clamping plate 6 is clamped and fixed with the lower hinge 2 through the clamping bolt 7, and the front and rear positions and the up and down positions of the hinge are adjusted. The left and right positions of the hinge are adjusted by the adjusting bolt 8, realizing the multi-dimensional adjustment of the door gap. The first fixed seat 3 is provided with a central control relief hole penetrating through the upper and lower ends thereof, facilitating the penetration of the central control lock shaft through the first fixed seat 3.

[0074] Referring to Figure 12 , 13In the embodiment, the second fixing seat 10 is a fixed plate structure, which includes a hinge fixing part and a blocking rib fixing part. A tensioning support is arranged between the hinge fixing part and the blocking rib fixing part. The blocking rib fixing part is a folded edge side ear of the hinge fixing part. The blocking rib fixing part is located at the top end and / or the bottom end of the hinge fixing part to adapt to the installation and fixation of the upper and lower ends of the door leaf. The blocking rib fixing part has a gap on the front and back sides to avoid the folded edge structure of the blocking rib surface 8 of the upper and lower ends of the door leaf, so as to facilitate the buckling and shaping of the inner and outer panels of the door leaf. The tensioning support is diagonally supported between the blocking rib surface 8 and the hinge edge 9 to form a triangular stable structure, so as to avoid the deformation of the door leaf. At the same time, the connection between the second fixing seat 10 and the upper hinge 1 is realized. The stable structure of the mutual connection and common action is formed between the side door leaf 500, 200 and the door frame 100, between the main door leaf 400 and the side door leaf 500, 200, and between each door leaf itself, so as to effectively enhance the structural strength and stability of the connection structure of the door leaf itself, the side door leaf 500, 200 and the door frame 100, and the main door leaf 400, the side door leaf 500, 200, and reduce and avoid the deformation and sagging of the door leaf caused by the gravity of the door leaf. Further, the tensioning support 1004 and the hinge fixing part have a tensioning fitting gap. After the tensioning support 1004 is connected and fixed by the blocking rib fixing part, the blocking rib and the fixing seat are tensioned by reducing the fitting gap, so that the triangular stable structure has a certain strength, and the tensile capacity of the door leaf is effectively further improved, so as to further improve the anti-sagging effect.

[0075] As a further preferred solution, the second fixing seat 10 is provided with a movable plate 1002, which is connected with the upper hinge 1 by a bolt and is connected with the second fixing seat 10 in front and back sliding mode to cooperate with the connection of the upper hinge 1, so that the folded edge part 102 of the upper hinge 1 is tightly matched with the cover edge 700.

[0076] Referring to Figure 11 , 13 , 14, 15, the door gap between each adjacent door leaf and between the side door leaf 500, 200 and the door frame 100 is provided with a cover edge 700 on the inner and outer sides of the door to cover the door gap. The cover edge sealing strip 1000 is matched to form a double-covering double-sealing structure, which not only has sound insulation and dust prevention, but also is beautiful and elegant. After the door is closed, the hinge edge of the door leaf and the door frame and the hinge edge of the door leaf and the door leaf cannot be seen from the inner and outer sides of the door.

[0077] Figure 14The door leaf is formed by buckling the inner and outer panels, the main door leaf 400 is formed by buckling the main door leaf outer panel 41 and the main door leaf inner panel 42, the auxiliary door leaf 300 is formed by buckling the auxiliary door leaf outer panel 31 and the auxiliary door leaf inner panel 32, the side door leaf 500 is formed by buckling the side door leaf outer panel 51 and the side door leaf inner panel 52, and the side door leaf 200 is formed by buckling the side door leaf outer panel 21 and the side door leaf inner panel 22. The first fixing seat 3 and the second fixing seat 10 of the hinge 600 in the embodiment are arranged at positions as follows: the second fixing seat 10 is arranged on the outer panel 41, 31 of the main door leaf 400 and the auxiliary door leaf 300 close to one side of the side door leaf 500, 200, and the corresponding first fixing seat 3 is arranged on the side door leaf inner panel 52, 22 of the side door leaf 500, 200 close to the main door leaf 400 and the auxiliary door leaf 300; the second fixing seat 10 is arranged on the side of the side door leaf outer panel 51, 21 corresponding to the door frame 100, and the corresponding first fixing seat 3 is arranged on the corresponding door frame 100. The structure position arrangement is more reasonable, the hinge and the connecting structure are arranged on the bearing points and the places where the door leaf is relatively weak in tensile capacity, the places weak in tensile capacity are fixed and strengthened, a stable and reliable tensile and compressive connecting structure is formed, the tensile and compressive strength of the door leaf is greatly improved, and the effects of stable and reliable anti-walk, anti-sag and anti-fall are achieved.

[0078] The structure is that the hinge fixing seat is arranged at the top end and the bottom end of the connecting side of the door leaf and the door frame, the top surface blocking rib / bottom surface blocking rib and the connecting side are connected with the fixing seat, the stable and reliable connection between the door frame and the door leaf and between the door leaves is realized through the hinge, the stable and reliable connection between the door frame and the door leaf and between the door leaves is realized through the hinge, and thus the whole door is stably and reliably connected. Moreover, the connecting position is located at the maximum stress position and the place weak in tensile capacity of the door leaf connecting structure, the stability and reliability of the easy-to-deform position are improved, and thus the occurrence of door sagging or falling is effectively avoided.

[0079] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or equivalently replace some technical features, as long as the modification, equivalent replacement or improvement is within the spirit and principle of the present application. Any modification, equivalent replacement, improvement, etc. should be included in the protection scope of the present application.

Claims

1. A hinge comprising an upper hinge and a lower hinge connected by a hinge shaft, the upper hinge and the lower hinge each comprising a fixed part and a shaft connecting part, the fixed part of the upper hinge having a folded edge part on one side, the folded edge part being connected to the shaft connecting part by a connecting part, characterized in that: The first fixed seat is provided with a recess groove corresponding to the upper hinge. The first fixed seat comprises a box body in the shape of a cuboid, and the box body is provided with recess grooves on two adjacent sides. The box body is provided with an adjusting clamp plate connected with the lower hinge, and the adjusting clamp plate is provided with a clamping bolt penetrating through the first fixed seat.

2. A hinge sleeve for use with a hinge according to claim 1, characterized in that The hinge sleeve is arranged at the outer end of the upper hinge or the lower hinge. The hinge sleeve comprises a sleeve and a lock key.

3. A hinge cover according to claim 2, wherein The sleeve is provided with a slot on the circumferential side wall along the axial direction of the sleeve.

4. The hinge cover according to claim 2, wherein The sleeve is provided with a locking groove on the inner wall. The lock key is provided with a locking strip corresponding to the locking groove.

5. A sag-resistant door comprising a door frame, a door leaf and a hinge according to claim 1, characterized in that The hinge sleeve further comprises a plug.

6. A sag-preventing door according to claim 5, wherein The lock key and the plug are separately arranged or integrally formed.

7. The sag-preventing door according to claim 5, wherein The hinge comprises an upper hinge and a lower hinge connected by a rotating shaft.

8. The sag-preventing door according to claim 5, wherein The first fixed seat is provided with a side lug. The second fixed seat is provided with a diagonal support and / or a side lug. The second fixed seat is provided with a movable plate. The first fixed seat is connected with the side and top blocking ribs / bottom blocking ribs of the door frame / door leaf. The second fixed seat is connected with the side and top blocking ribs / bottom blocking ribs of the door leaf.

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