Back-bolt type door leaf clearance adjustment mechanism and door leaf frame installation method

Abstract

The present invention relates to a back-bolt type door leaf gap adjustment mechanism and a door leaf frame installation method. It solves the defects such as unreasonable design in the prior art. This back-bolt type door leaf gap adjustment mechanism includes a first door sub-sleeve and a second door sub-sleeve that are parallel to each other. A first profile is connected to the extending end of the first door sub-sleeve, and a second profile that is fixed to one vertical surface of the second door sub-sleeve is connected to the extending end of the second door sub-sleeve. A main door sleeve is connected between the first profile and the second profile. Back-bolt angle codes that are spaced apart from the main door sleeve are provided on the vertical surface of the door opening. A driving structure for driving the first profile to move in the width direction of the door leaf is provided between the back-bolt angle code and the first profile. Advantages of this application: The pre-setting of the back-bolt angle code on the wall provides a stable installation platform for the fixation of the first profile, and at the same time avoids the situation of unevenness on the wall, which facilitates the further precise leveling of the first profile later.

Description

Technical Field

[0001] The present invention belongs to the technical field of door frames, and particularly relates to a back-bolt type door leaf gap adjustment mechanism and a door leaf frame installation method. Background Art

[0002] A door frame is a term in building decoration, referring to the two door frames inside and outside the door. It is also directly called a door frame. Its main functions are to fix the door leaf, protect the wall corners, and for decoration, etc. It is commonly used in the decoration process to protect the door from scratches, corrosion, damage, dirt, etc. Since the door frame has to bear the continuous pressure from the door leaf, the fixing method between its interior and the wall surface and the flatness of the panel will determine the stability of the door frame.

[0003] A new type of panel door disclosed in Patent CN201502266U includes a door frame, a door leaf, and door frame lines. The door frame is composed of a main frame and a sub-frame. The main frame is provided with a step, and the sub-frame is assembled at the step of the main frame. The present invention has the characteristics of high stability, good sound insulation and sealing effect, low possibility of the lock being pried open, and not easily causing harm to the human body, and can be widely used in home decoration.

[0004] In the above solution, the door frame lines are directly connected to the wall surface to fix the door frame. However, the firmness of the connection between the door frame lines and the wall surface completely depends on the specific conditions of the wall surface, such as the flatness of the wall surface, the angle and material of the corner, etc. Therefore, the firmness of the door frame has become an uncontrollable factor during the installation process, increasing the potential safety hazards after the door frame is installed. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems by providing a back-bolt type door leaf gap adjustment mechanism and a door leaf frame installation method that can solve the above technical problems.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] This back-bolt type door leaf clearance adjustment mechanism includes a first door sub-sleeve and a second door sub-sleeve that are parallel to each other. The opposite ends of the first door sub-sleeve and the second door sub-sleeve extend into the door opening of the wall. At one end of the first door sub-sleeve extending into the door opening, a first profile is connected. At one end of the second door sub-sleeve extending into the door opening, a second profile fixed to a vertical surface of the wall close to the second door sub-sleeve is connected. A main door sleeve is connected between the first profile and the second profile. Back-bolt angle codes spaced from the main door sleeve are provided on the vertical surface of the door opening. The first profile and the main door sleeve are connected by a cantilever connection structure. The back-bolt type door leaf clearance adjustment mechanism further includes a filling and stopping plate that fits on a surface of the back-bolt angle code away from the wall. A gap is reserved between the filling and stopping plate and the main door sleeve. One corner of the filling and stopping plate close to the second profile abuts against the right-angle side of the second profile, and one side surface of the filling and stopping plate away from the second profile is in sliding contact with the first profile. A driving structure for driving the first profile to move in the width direction of the door leaf is provided between the back-bolt angle code and the first profile.

[0008] In the back-bolt type door leaf clearance adjustment mechanism, the driving structure includes a first adjustment block fixed to the back-bolt angle code. A first gap is provided between the first adjustment block and the first profile. A second adjustment block is provided on the first profile, and a second gap is provided between the second adjustment block and the back-bolt angle code. The first adjustment block and the second adjustment block cooperate. An adjustment screw passing through the first adjustment block and the second adjustment block is inserted through the back-bolt angle code. The adjustment screw is threadedly connected to a threaded hole on the first profile. A first concave-convex structure is provided on an inclined surface of the first adjustment block, and a second concave-convex structure is provided on an inclined surface of the second adjustment block. The first concave-convex structure and the second concave-convex structure mesh with each other.

[0009] In the back-bolt type door leaf clearance adjustment mechanism, a first elongated through hole for the adjustment screw to pass through is provided on the first adjustment block. A second through hole communicating with the first elongated through hole is provided on the second adjustment block. The second through hole is either a circular hole or a rectangular hole.

[0010] In the back-bolt type door leaf clearance adjustment mechanism, a first spacing is left between the first adjustment block and the first door sub-sleeve, and a second spacing is left between the second adjustment block and the filling and stopping plate.

[0011] In the back-bolt type door leaf gap adjusting mechanism, the cantilever connection structure includes an L-shaped suspended arm connected to the side of the first profile close to the main door sleeve. A circumferential side limiting cantilever wall of the door sleeve and a surface limiting arm of the door sleeve thickness are connected to the suspended end of the L-shaped suspended arm. The circumferential side limiting cantilever wall of the door sleeve and the surface limiting arm of the door sleeve thickness form a right-angle positioning opening. One circumferential side surface of the main door sleeve abuts against the circumferential side limiting cantilever wall of the door sleeve, and the outer surface of the main door sleeve in the thickness direction abuts against the surface limiting arm of the door sleeve thickness.

[0012] In the back-bolt type door leaf gap adjusting mechanism, a U-shaped groove with an opening facing the filling stop plate is formed between the circumferential side limiting cantilever wall of the door sleeve and the L-shaped suspended arm.

[0013] In the back-bolt type door leaf gap adjusting mechanism, a partial surface of the circumferential side of the filling stop plate close to the first profile is in sliding contact with the first profile.

[0014] In the back-bolt type door leaf gap adjusting mechanism, the first concave-convex structure includes a plurality of first tooth parts arranged on the inclined surface of the first adjusting block, the second concave-convex structure includes a plurality of second tooth parts arranged on the inclined surface of the second adjusting block, and the first tooth parts and the second tooth parts are meshed with each other.

[0015] This back-bolt type door leaf gap adjusting mechanism includes a first door sub-sleeve and a second door sub-sleeve that are parallel to each other. The opposite ends of the first door sub-sleeve and the second door sub-sleeve extend into the door opening of the wall. A first profile is connected to one end of the first door sub-sleeve extending into the door opening, and a second profile fixed to a vertical surface of the wall close to the second door sub-sleeve is connected to one end of the second door sub-sleeve extending into the door opening. Back-bolt angle codes spaced from the main door sleeve are arranged on the vertical surface of the door opening. A driving structure for driving the first profile to move in the width direction of the door leaf is provided between the back-bolt angle code and the first profile. The driving structure includes a first adjusting block fixed to the back-bolt angle code, a second adjusting block is arranged on the first profile, a first concave-convex structure is arranged on the inclined surface of the first adjusting block, a second concave-convex structure is arranged on the inclined surface of the second adjusting block, the first concave-convex structure and the second concave-convex structure are meshed with each other, and an adjusting screw passing through the first adjusting block and the second adjusting block is inserted through the back-bolt angle code, and the adjusting screw is in threaded connection with the threaded hole on the first profile.

[0016] This application also provides a method for installing a back-bolt type door leaf frame, including the following steps:

[0017] S1. Measure the width of the door opening opened on the wall, and calculate the reserved space dimensions between the two sides of the door leaf width and the two vertical surfaces of the door opening;

[0018] S2. According to the space dimensions reserved in step S1, fixedly connect each back bolt angle code with a first adjusting block, fix each second adjusting block to the first profile, and then pre-fit the first adjusting block and the second adjusting block. When the first adjusting block on the back bolt angle code moves in the inside-outside direction of the door opening relative to the second adjusting block on the first profile to a position that conforms to the reserved space dimensions, the first concave-convex structure on the first adjusting block meshes with the second concave-convex structure on the second adjusting block, and the adjusting screw passing through the back bolt angle code locks the first adjusting block, the second adjusting block, and the first profile in the width direction of the door opening;

[0019] S3. Fix the back bolt angle code in step S2 to the corresponding elevation of the door opening;

[0020] S4. On the basis of step S3, make one surface in the thickness direction of the filling stop plate fit snugly on the back bolt angle code, and make a part of the circumferential side surface of the filling stop plate fit snugly on the first profile;

[0021] S5. On the basis of step S4, fix the main door sleeve to the first profile, and fix the second profile to the sides of the main door sleeve and the filling stop plate away from the first profile and the wall respectively;

[0022] S6. On the basis of step S5, fix the first door sub-sleeve to the first profile, and fix the second door sub-sleeve to the second profile, that is, assemble to form a door leaf frame.

[0023] In the above installation method of the back bolt type door leaf frame, the back bolt angle code is rectangular, and one end of the back bolt angle code close to the first door sub-sleeve is flush with the opening of the door opening, or one end of the back bolt angle code close to the first door sub-sleeve is retracted into the opening of the door opening.

[0024] The advantages of the present invention are:

[0025] Pre-setting the back bolt angle code and the driving structure on the wall provides a stable installation platform for the fixation of the first profile, and also avoids the situation of unevenness on the wall surface, which facilitates the further precise leveling of the first profile later. The back bolt angle code can overcome the problem of insufficient wall grasping force through multi-point screw fixation, making the installation of the first profile more integral and improving the installation accuracy between components.

[0026] An adjusting driving structure is also provided between the first profile and the back bolt angle code, which can finely adjust the errors existing in the door opening itself, so that the door frame can be adapted to the door leaf according to the set uniform gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the installation structure of the door leaf and the door frame of the present invention.

[0028] Figure 2For Figure 1 Schematic diagram of the enlarged structure at position B in

[0029] Figure 3 Schematic diagram of the structure of Embodiment 3 provided by the present invention.

[0030] In the figure, the first door sub - sleeve 1, the second door sub - sleeve 2, the first profile 3, the second profile 4, the main door sleeve 5, the back - bolt angle code 6, the filling stop plate 7, the first adjusting block 8, the second adjusting block 9, the adjusting screw 10, the first concave - convex structure 11, the second concave - convex structure 12, the L - shaped suspended arm 13, the circumferential limiting cantilever wall of the door sleeve 14, the thickness - surface limiting arm of the door sleeve 15, the U - shaped groove 16, the wall A, the first gap a1, and the second gap a2. Detailed implementation mode

[0031] The following are specific embodiments of the invention and in combination with the attached drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0032] As Figures 1-3 shown, the back - bolt type door leaf gap adjustment mechanism of this embodiment includes a first door sub - sleeve 1 and a second door sub - sleeve 2 that are parallel to each other. The opposite ends of the first door sub - sleeve 1 and the second door sub - sleeve 2 extend into the door opening of the wall A. At one end of the first door sub - sleeve 1 extending into the door opening, a first profile 3 is connected. At one end of the second door sub - sleeve 2 extending into the door opening, a second profile 4 fixed to one facade of the wall A close to the second door sub - sleeve 2 is connected. A back - bolt angle code 6 spaced from the main door sleeve 5 is provided on the facade of the door opening. A driving structure for driving the first profile 3 to move in the width direction of the door leaf is provided between the back - bolt angle code 6 and the first profile 3. The driving structure includes a first adjusting block 8 fixed to the back - bolt angle code 6. A second adjusting block 9 is provided on the first profile 3. A first concave - convex structure 11 is provided on the inclined surface of the first adjusting block 8. A second concave - convex structure 12 is provided on the inclined surface of the second adjusting block 9. The first concave - convex structure 11 and the second concave - convex structure 12 are engaged with each other. An adjusting screw 10 passing through the first adjusting block 8 and the second adjusting block 9 is provided on the back - bolt angle code 6, and the adjusting screw 10 is in threaded connection with the threaded hole on the first profile 3.

[0033] Embodiment 1

[0034] As Figures 1-2 shown, the back - bolt type door leaf gap adjustment mechanism of this embodiment includes a first door sub - sleeve 1 and a second door sub - sleeve 2 that are parallel to each other. The opposite ends of the first door sub - sleeve 1 and the second door sub - sleeve 2 extend into the door opening of the wall A. The extending length of the first door sub - sleeve 1 is different from the extending length of the second door sub - sleeve 2, and the door leaf is finally installed on one side of the first door sub - sleeve 1.

[0035] At one end of the first door sub - sleeve 1 extending into the opening of the door hole, a first profile 3 is connected. The first profile 3 is an aluminum profile. On one side of the first profile 3 close to the door leaf and the corresponding side of the door leaf, a door leaf gap is formed.

[0036] At one end of the second door sub - sleeve 2 extending into the opening of the door hole, a second profile 4 fixed to one vertical surface of the wall A close to the second door sub - sleeve 2 is connected. The second profile 4 is an aluminum profile.

[0037] A main door sleeve 5 is connected between the first profile 3 and the second profile 4. On the vertical surface of the door hole, back - bolt angle codes 6 are arranged at intervals with the main door sleeve 5. The back - bolt angle codes 6 are metal blocks, such as rectangular shapes, etc.

[0038] The first profile 3 and the main door sleeve 5 are connected through a cantilever - type connection structure. The cantilever - type connection structure has certain elastic properties to enable small deformations during gap adjustment.

[0039] This back - bolt type door leaf gap adjustment mechanism further includes a filling and stopping plate 7 that fits on the surface of the back - bolt angle code 6 away from the wall A. The material of the filling and stopping plate 7 is, for example, wood, etc. A gap is reserved between the filling and stopping plate 7 and the main door sleeve 5 to provide room for deformation. One corner of the filling and stopping plate 7 close to the second profile 4 abuts against the right - angled side of the second profile 4, and one side surface of the filling and stopping plate 7 away from the second profile 4 is in sliding contact with the first profile 3. All four side surfaces of the cross - section of the filling and stopping plate 7 are in contact respectively, so that the position of the filling and stopping plate 7 can be stably fixed. At the same time, the filling and stopping plate 7 can also play a role in stopping the main door sleeve 5 in the width direction of the door hole and stopping the first profile 3 in the front - to - back direction of the door hole.

[0040] A driving structure for driving the first profile 3 to move in the width direction of the door leaf is arranged between the back - bolt angle code 6 and the first profile 3. The driving structure can adjust the distance between the first profile 3 and the door leaf so that the gap between the door leaf and the first profile 3 can be adjusted.

[0041] Specifically, the driving structure of this embodiment includes a first adjusting block 8 fixed to the back bolt angle code 6. There is a first gap a1 between the first adjusting block 8 and the first profile 3. A second adjusting block 9 is provided on the first profile 3, and there is a second gap a2 between the second adjusting block 9 and the back bolt angle code 6. The first adjusting block 8 and the second adjusting block 9 cooperate. An adjusting screw 10 passing through the first adjusting block 8 and the second adjusting block 9 is inserted through the back bolt angle code 6. The adjusting screw 10 can be a self-tapping screw or a conventional screw. The adjusting screw 10 is threadedly connected to the threaded hole on the first profile 3. A first concave-convex structure 11 is provided on the inclined surface of the first adjusting block 8, and a second concave-convex structure 12 is provided on the inclined surface of the second adjusting block 9. The first concave-convex structure 11 and the second concave-convex structure 12 mesh with each other. Further, the first concave-convex structure 11 includes a number of first tooth portions provided on the inclined surface of the first adjusting block 8, and the second concave-convex structure 12 includes a number of second tooth portions provided on the inclined surface of the second adjusting block 9. The first tooth portions and the second tooth portions mesh with each other.

[0042] Moving one tooth position causes the position of the first adjusting block 8 relative to the second adjusting block 9 to change in the width direction of the door leaf, which can also drive the position change of the first profile 3 to achieve the purpose of gap adjustment.

[0043] The inclined surfaces of the first adjusting block 8 and the second adjusting block 9 are matched with each other, and then the first concave-convex structure 11 and the second concave-convex structure 12 are further designed. By adjusting the position of the first adjusting block 8 relative to the second adjusting block 9 to the set position, finally, the first concave-convex structure 11 and the second concave-convex structure 12 are used for bite locking to achieve the locking purpose.

[0044] Secondly, the first concave-convex structure 11 and the second concave-convex structure 12 also play a scale role. When moving relative to one scale or one tooth position, for example, it represents 1 mm, to accurately control the gap between the door leaf and the first profile 3.

[0045] For the convenience of adjustment, a first strip-shaped through hole for the adjusting screw 10 to pass through is provided on the first adjusting block 8, and a second through hole communicating with the first strip-shaped through hole is provided on the second adjusting block 9. The second through hole can be any one of a circular hole and a strip-shaped hole. Of course, the first strip-shaped through hole can also be a circular hole, and at this time, the adjusting screw 10 is a self-tapping screw.

[0046] To avoid moving adjustment interference, a first distance is left between the first adjusting block 8 and the first door sub-sleeve 1, and a second distance is left between the second adjusting block 9 and the filling stop plate 7.

[0047] Specifically, the cantilever connection structure of this embodiment includes an L-shaped suspended arm 13 connected to the side of the first profile 3 close to the main door sleeve 5. A circumferential side limit cantilever wall 14 of the door sleeve and a thickness surface limit arm 15 of the door sleeve are connected to the suspended end of the L-shaped suspended arm 13. The circumferential side limit cantilever wall 14 of the door sleeve and the thickness surface limit arm 15 of the door sleeve form a right-angle positioning opening. One circumferential side surface of the main door sleeve 5 abuts against the circumferential side limit cantilever wall 14 of the door sleeve, and the outer surface in the thickness direction of the main door sleeve 5 abuts against the thickness surface limit arm 15 of the door sleeve. The above structure can facilitate the installation and fixation of the main door sleeve 5, and at the same time provide certain elastic deformation performance, so that the main door sleeve 5 is installed in place, and the gap between the door leaf and the first profile 3 is adjusted in place.

[0048] Secondly, a U-shaped groove 16 with an open end facing the filling stop plate 7 is formed between the circumferential side limit cantilever wall 14 of the door sleeve and the L-shaped suspended arm 13. The above structure can prevent external dust and water vapor from easily entering the reserved gap between the filling stop plate 7 and the main door sleeve 5.

[0049] In a preferred solution, a partial surface of one circumferential side of the filling stop plate 7 close to the first profile 3 is in sliding contact with the first profile 3. This is beneficial for the position self-adaptive adjustment of small deformations. Of course, here the filling stop plate 7 and the first profile 3 adopt a surface-to-surface contact method to improve stability.

[0050] The adjustment principle of this embodiment is as follows:

[0051] According to the reserved space size between the door leaf and the first profile 3, each back bolt angle code 6 is fixedly connected to a first adjusting block 8, and each second adjusting block 9 is fixed to the first profile 3. Then, the first adjusting block 8 and the second adjusting block 9 are pre-fitted. When the first adjusting block 8 on the back bolt angle code 6 moves in the inside-outside direction of the door opening relative to the second adjusting block 9 on the first profile 3 to a position that conforms to the reserved space size, the first concave-convex structure 11 on the first adjusting block 8 and the second concave-convex structure 12 on the second adjusting block 9 are engaged with each other, and the adjusting screw 10 passing through the back bolt angle code 6 locks the first adjusting block 8, the second adjusting block 9, and the first profile 3 in the width direction of the door opening.

[0052] The first adjusting block 8 and the second adjusting block 9 are in an original integral block state, and the integral block is respectively connected to the back bolt angle code 6 and the first profile 3. Then, the integral block is cut into the first adjusting block 8 with a first concave-convex structure and the first adjusting block 8 with a second concave-convex structure by wire cutting positioning. The above method can ensure the matching of the first concave-convex structure and the second concave-convex structure.

[0053] Embodiment 2

[0054] As Figures 1-3As shown in the figure, based on Embodiment 1, this embodiment further provides a method for installing a back-bolt type door leaf frame. This back-bolt type door leaf frame installation method uses the back-bolt type door leaf gap adjustment mechanism of Embodiment 1, and the back-bolt type door leaf frame installation method of this embodiment includes the following steps:

[0055] S1. Measure the width of the door opening formed in Wall A, and calculate the reserved space dimensions between the two vertical facades of the door leaf width sides and the door opening;

[0056] S2. According to the space dimensions reserved in Step S1, fixedly connect each back-bolt angle code 6 with a first adjusting block 8, fix each second adjusting block 9 to the first profile 3, and then pre-fit the first adjusting block 8 and the second adjusting block 9. When the first adjusting block 8 on the back-bolt angle code 6 moves in the inside-outside direction of the door opening relative to the second adjusting block 9 on the first profile 3 to a position that conforms to the reserved space dimensions, the first concave-convex structure 11 on the first adjusting block 8 and the second concave-convex structure 12 on the second adjusting block 9 are engaged with each other, and the adjusting screw 10 passing through the back-bolt angle code 6 locks the first adjusting block 8, the second adjusting block 9, and the first profile 3 in the width direction of the door opening;

[0057] S3. Fix the back-bolt angle code 6 in Step S2 to the corresponding facade of the door opening;

[0058] S4. On the basis of Step S3, make one surface in the thickness direction of the filling stop plate 7 fit snugly on the back-bolt angle code 6, and make a part of one circumferential side surface of the filling stop plate 7 fit snugly on the first profile 3;

[0059] S5. On the basis of Step S4, fix the main door sleeve 5 to the first profile 3, and fix the second profile 4 to the sides of the main door sleeve 5 and the filling stop plate 7 away from the first profile 3 and Wall A respectively;

[0060] S6. On the basis of Step S5, fix the first door sub-sleeve 1 to the first profile 3, and fix the second door sub-sleeve 2 to the second profile 4, that is, assemble to form a door leaf frame.

[0061] Of course, the first door sub-sleeve 1 in Step S6 can also be installed between S3 and S4.

[0062] Further, the back-bolt angle code 6 of this embodiment is rectangular, and one end of the back-bolt angle code 6 close to the first door sub-sleeve 1 is flush with the opening of the door opening, or one end of the back-bolt angle code 6 close to the first door sub-sleeve 1 is retracted into the opening of the door opening. To prevent the back-bolt angle code 6 from protruding outside the opening and interfering with the installation of the first door sub-sleeve 1.

[0063] Embodiment 3

[0064] As Figure 3As shown, the working principle and structure of this embodiment are basically the same as those of Embodiment 1. The different structure lies in that the main door sleeve 5 is fixed between the second profile 4 and the second adjusting block 9.

[0065] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. Back-bolt type door leaf gap adjustment mechanism, including a first door sub-sleeve (1) and a second door sub-sleeve (2) that are parallel to each other. The opposite ends of the first door sub-sleeve (1) and the second door sub-sleeve (2) extend into the door opening of the wall body (A). At one end of the first door sub-sleeve (1) extending into the door opening, a first profile (3) is connected. At one end of the second door sub-sleeve (2) extending into the door opening, a second profile (4) fixed to one vertical surface of the wall body (A) close to the second door sub-sleeve (2) is connected. A main door sleeve (5) is connected between the first profile (3) and the second profile (4). Back-bolt angle codes (6) are arranged at intervals with the main door sleeve (5) on the vertical surface of the door opening. Characterized in that, The first profile (3) and the main door sleeve (5) are connected by a cantilever connection structure. The back-bolt type door leaf gap adjustment mechanism further includes a filling and stopping plate (7) that fits on the surface of the back-bolt angle code (6) away from the wall body (A). A gap is reserved between the filling and stopping plate (7) and the main door sleeve (5). One corner of the filling and stopping plate (7) close to the second profile (4) abuts against the right-angle side of the second profile (4), and one side surface of the filling and stopping plate (7) away from the second profile (4) is in sliding contact with the first profile (3). A driving structure for driving the first profile (3) to move in the width direction of the door leaf is provided between the back-bolt angle code (6) and the first profile (3). The driving structure includes a first adjusting block (8) fixed to the back-bolt angle code (6). A first gap (a1) is provided between the first adjusting block (8) and the first profile (3). A second adjusting block (9) is provided on the first profile (3), and a second gap (a2) is provided between the second adjusting block (9) and the back-bolt angle code (6). An adjusting screw (10) passing through the first adjusting block (8) and the second adjusting block (9) is inserted through the back-bolt angle code (6). The adjusting screw (10) is threadedly connected to a threaded hole on the first profile (3). A first concave-convex structure (11) is provided on the inclined surface of the first adjusting block (8), and a second concave-convex structure (12) is provided on the inclined surface of the second adjusting block (9). The first concave-convex structure (11) and the second concave-convex structure (12) are meshed with each other.

2. The back-bolt type door leaf gap adjustment mechanism according to claim 1, Characterized in that, The first adjusting block (8) is provided with a first strip-shaped through hole for the adjusting screw (10) to pass through. The second adjusting block (9) is provided with a second through hole communicating with the first strip-shaped through hole. The second through hole is any one of a circular hole and a strip-shaped hole.

3. The back-bolt type door leaf gap adjustment mechanism according to claim 1, Characterized in that, A first distance is left between the first adjusting block (8) and the first door sub-sleeve (1), and a second distance is left between the second adjusting block (9) and the filling and stopping plate (7).

4. The back-bolt type door leaf gap adjustment mechanism according to claim 1, It is characterized in that the first concave-convex structure (11) includes a plurality of first tooth parts arranged on the inclined surface of the first adjusting block (8), the second concave-convex structure (12) includes a plurality of second tooth parts arranged on the inclined surface of the second adjusting block (9), and the first tooth parts and the second tooth parts are engaged with each other.

5. The back-bolt type door leaf gap adjusting mechanism according to claim 1, It is characterized in that the cantilever connection structure includes an L-shaped suspended arm (13) connected to the side of the first profile (3) close to the main door sleeve (5). A door sleeve circumferential side limiting cantilever wall (14) and a door sleeve thickness surface limiting arm (15) are connected to the suspended end of the L-shaped suspended arm (13). The door sleeve circumferential side limiting cantilever wall (14) and the door sleeve thickness surface limiting arm (15) form a right-angle positioning opening. One circumferential side surface of the main door sleeve (5) abuts against the door sleeve circumferential side limiting cantilever wall (14), and the outer surface of the main door sleeve (5) in the thickness direction abuts against the door sleeve thickness surface limiting arm (15).

6. The back-bolt type door leaf gap adjusting mechanism according to claim 5, It is characterized in that a U-shaped groove (16) with an opening facing the filling stop plate (7) is formed between the door sleeve circumferential side limiting cantilever wall (14) and the L-shaped suspended arm (13).

7. The back-bolt type door leaf gap adjusting mechanism includes a first door sub-sleeve (1) and a second door sub-sleeve (2) that are parallel to each other. The opposite ends of the first door sub-sleeve (1) and the second door sub-sleeve (2) extend into the door opening of the wall body (A). A first profile (3) is connected to one end of the first door sub-sleeve (1) extending into the door opening. A second profile (4) fixed to one vertical surface of the wall body (A) close to the second door sub-sleeve (2) is connected to one end of the second door sub-sleeve (2) extending into the door opening. A main door sleeve (5) is connected between the first profile (3) and the second profile (4). Back-bolt angle codes (6) spaced from the main door sleeve (5) are arranged on the vertical surface of the door opening. It is characterized in that a driving structure for driving the first profile (3) to move in the width direction of the door leaf is arranged between the back-bolt angle code (6) and the first profile (3). The driving structure includes a first adjusting block (8) fixed to the back-bolt angle code (6). A second adjusting block (9) is arranged on the first profile (3). A first concave-convex structure (11) is arranged on the inclined surface of the first adjusting block (8). A second concave-convex structure (12) is arranged on the inclined surface of the second adjusting block (9). The first concave-convex structure (11) and the second concave-convex structure (12) are engaged with each other. An adjusting screw (10) passing through the first adjusting block (8) and the second adjusting block (9) is arranged on the back-bolt angle code (6). The adjusting screw (10) is in threaded connection with a threaded hole on the first profile (3).

8. The installation method of the back-bolt type door leaf frame, It is characterized in that the installation method of the back-bolt type door leaf frame adopts the back-bolt type door leaf gap adjusting mechanism according to any one of claims 1-7, and the installation method of the back-bolt type door leaf frame includes the following steps: S1. Measure the width of the door opening formed in the wall (A), and calculate the reserved space dimensions between the two vertical facades of the door leaf width on both sides and the door opening. S2. According to the reserved space dimensions in step S1, fixedly connect each back bolt angle code (6) and a first adjusting block (8), fix each second adjusting block (9) to the first profile (3), and then pre-fit the first adjusting block (8) and the second adjusting block (9). When the first adjusting block (8) on the back bolt angle code (6) moves in the inside-outside direction of the door opening relative to the second adjusting block (9) on the first profile (3) to a position that conforms to the reserved space dimensions, the first concave-convex structure (11) on the first adjusting block (8) and the second concave-convex structure (12) on the second adjusting block (9) are engaged with each other, and the adjusting screw (10) passing through the back bolt angle code (6) locks the first adjusting block (8), the second adjusting block (9), and the first profile (3) in the width direction of the door opening. S3. Fix the back bolt angle code (6) in step S2 to the corresponding facade of the door opening. S4. On the basis of step S3, make one surface in the thickness direction of the filling stop plate (7) fit snugly on the back bolt angle code (6), and make a part of the circumferential side surface of the filling stop plate (7) fit snugly on the first profile (3). S5. On the basis of step S4, fix the main door sleeve (5) to the first profile (3) or the second adjusting block (9), and fix the second profile (4) to the sides of the main door sleeve (5) and the filling stop plate (7) away from the first profile (3) and the wall (A) respectively. S6. On the basis of step S5, fix the first door sub-sleeve (1) to the first profile (3), and fix the second door sub-sleeve (2) to the second profile (4), that is, assemble to form a door leaf frame.

9. The installation method of the back bolt type door leaf frame according to claim 8, characterized in that, the back bolt angle code (6) is rectangular, and one end of the back bolt angle code (6) close to the first door sub-sleeve (1) is flush with the opening of the door opening, or one end of the back bolt angle code (6) close to the first door sub-sleeve (1) is retracted into the opening of the door opening.

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