Fabricated fire resisting shutter lower opening structure and leveling process thereof

Abstract

The assembly type fireproof roller shutter lower opening structure comprises an outer shell, the two sides of the top of the outer shell are in butt joint with an inner fireproof roller shutter and an outer fireproof roller shutter correspondingly, the fireproof roller shutters are in butt joint with a winding and unwinding assembly in a roller shutter box, and a door body is detachably arranged on the outer shell; the inner box body is inserted into a containing cavity formed in the bottom of the outer shell; the adjusting mechanism comprises an upper support and an adjusting piece which are arranged in the containing cavity, and the ends of the adjusting piece are arranged on the second assembling holes of the inner box body and the upper support in a penetrating mode respectively and are locked and positioned; by adjusting the adjusting mechanism, the end face flatness and gravity center adjustment of the lower opening structure is achieved, and the leveling effect is achieved. The problems that when an existing fireproof roller shutter is in a folded state, a lower opening structure and the bottom face of a roller shutter box are not in flat butt joint, the attractiveness is affected, when the existing fireproof roller shutter is in an unfolded state, the lower opening structure is inclined and cannot be tightly closed with the ground or a ground rail, the fireproof isolation effect is affected, and the use requirements of the fireproof roller shutter in different use states cannot be met can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of building decoration, in particular to an assembled fireproof rolling shutter lower opening structure and a leveling process thereof. Background Art

[0002] Fireproof rolling shutter refers to a special rolling shutter that can meet the requirements of fire resistance stability and integrity together with the frame within a certain period of time. It is composed of curtain plates, rollers, motors, guide rails, brackets, protective covers and control mechanisms. Fireproof rolling shutters are mainly used in walls that need to be fire-separated, especially fire walls and fire partitions that need to have larger openings due to production and use to facilitate passage and achieve fire separation effects under special fire conditions.

[0003] Fireproof roller shutters are widely used in fireproof partitions of industrial and civil buildings, and can effectively prevent the spread of fire. Common fireproof roller shutters can be divided into steel fireproof roller shutters, inorganic fiber composite fireproof roller shutters, and special fireproof roller shutters according to the curtain surface material. They can also be divided into single-layer fireproof roller shutters with one layer of curtain surface and double-layer fireproof roller shutters with two layers of curtain surface. For example, invention patent CN115419356B discloses a fireproof rolling shutter that is easy to install and an installation method, including a rolling shutter box and a supporting frame, the supporting frame is installed on the wall by fastening bolts, and locking block grooves are provided on the inner walls at both ends of the supporting frame, and docking plates and support plates are symmetrically installed on the end side walls of the rolling shutter box, threaded rods are rotatably installed on the support plates and the docking plates, threaded frames are threadedly installed on the threaded rods, and rotating plates are symmetrically rotatably installed on the threaded frames, and sliding blocks are rotatably installed on the other end of the rotating plates. The present invention arranges supporting frames, supporting plates and threaded rods at both ends of the rolling shutter, and the supporting frames can be pre-installed on the wall, and the rolling shutter box and the supporting frame can be conveniently docked through the supporting plate to realize the installation of the rolling shutter, and the operation is convenient and simple. At the same time, through the rotation of the threaded rod, it is convenient to drive the threaded frame to push the rotating plate and the sliding block, so that the sliding block pushes the locking block to be stuck in the locking block groove, thereby realizing the fixation of the rolling shutter box, and the operation is convenient and simple.

[0004] The above-mentioned prior art has fully studied and designed the convenience of installation of fireproof roller shutters. However, currently in the field of building installation and construction, the lower end of the fireproof roller shutter generally uses an aluminum plate to close the roller shutter, and is leveled by the weight of the lower aluminum plate. In actual use, in the stored state, the lower aluminum plate and the bottom surface of the roller shutter box are not level, affecting the aesthetics. In the unfolded state, the curtain surface will be deformed by the wind force inside and outside the roller shutter, and the lower structure will be tilted and cannot be tightly closed with the ground or the ground rail, affecting the fire isolation effect and failing to meet the use requirements of the fireproof roller shutter under different usage conditions. Summary of the invention

[0005] The purpose of the present invention is to provide an assembled fireproof rolling shutter lower opening structure and a leveling process thereof in order to solve the problems that, in the stored state, the lower opening structure of the existing fireproof rolling shutter is unevenly connected with the bottom surface of the rolling shutter box, affecting the aesthetics; in the unfolded state, the lower opening structure is tilted and cannot be tightly closed with the ground or the ground rail, affecting the fireproof isolation effect, and cannot meet the use requirements of the fireproof rolling shutter in different use states.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: an assembled fireproof roller shutter lower opening structure, comprising:

[0007] The outer shell has two sides of the top thereof connected to the inner fireproof rolling shutter and the outer fireproof rolling shutter respectively, the inner fireproof rolling shutter and the outer fireproof rolling shutter are connected to the retractable and unreeling components in the rolling shutter box, and the outer shell is detachably provided with a door body;

[0008] An inner box body, which is inserted into the cavity opened at the bottom of the outer box body;

[0009] The adjusting mechanism comprises an upper bracket and an adjusting member in the cavity, and the ends of the adjusting member are respectively passed through the second assembly holes of the inner box body and the upper bracket for locking and positioning.

[0010] As a further description of the above technical solution:

[0011] A partition is provided in the inner cavity of the rolling shutter box, and the partition divides the inner cavity into an equipment cavity and a storage cavity distributed up and down. The two retractable and retractable rolling assemblies are arranged in the equipment cavity and are respectively wound and docked with the inner fireproof rolling shutter and the outer fireproof rolling shutter, and they include rollers and a rotary drive motor. The inner fireproof rolling shutter and the outer fireproof rolling shutter are respectively passed through the avoidance openings at the corresponding positions of the partition, and the outer shell is stored in the storage cavity.

[0012] As a further description of the above technical solution:

[0013] The outer shell is provided with countersunk door grooves on the outer sides of the inner fireproof roller shutter and the outer fireproof roller shutter, and the stepped door body is embedded in the countersunk door grooves. A locking knob and a rotating shaft are provided on the outer shell, and the locking knob is eccentrically rotated on the rotating shaft to press and position the door body.

[0014] As a further description of the above technical solution:

[0015] The upper bracket is an angle bracket, which is assembled on the inner side plate at the top of the cavity by a plurality of dovetail screws.

[0016] As a further description of the above technical solution:

[0017] The adjusting member is a screw rod, and the first stud and the second stud at the end thereof are screwed together with a nut. The first stud and the second stud are respectively passed through the inner box body and the upper bracket. The nut abuts against the end surfaces of the inner box body and the upper bracket. The inner box body is an aluminum plate structure with an opening on the top.

[0018] As a further description of the above technical solution:

[0019] The longitudinal section of the second assembly hole is an arc-shaped structure whose size gradually increases from the center to the outside, and a groove is arranged on the outside. An abutment flap that abuts against the nut is movably arranged on the groove, and an elastic member is arranged between the groove and the abutment flap. The end of the adjusting member is passed through the avoidance hole of the abutment flap, and the size of the avoidance hole gradually increases from the inside to the outside.

[0020] As a further description of the above technical solution:

[0021] A guide plate is also extended horizontally or obliquely on the side wall of the cavity, and the adjusting member is inserted through the first assembly hole of the guide plate.

[0022] As a further description of the above technical solution:

[0023] A plurality of ball grooves are arranged on the side wall of the first assembly hole at intervals in the axial direction and the circumferential direction, and balls are embedded in the ball grooves.

[0024] As a further description of the above technical solution:

[0025] The size of the ball gradually decreases from the center to the outside of the first assembly hole.

[0026] A process for leveling the lower opening structure of an assembled fireproof rolling shutter comprises the following steps:

[0027] When the fireproof rolling shutter is retracted and the lower opening structure is stored, the door body is opened, and the relative positions of the upper brackets and the adjusting members of the adjusting mechanisms on both sides are adjusted, thereby adjusting the relative position of the inner box body in the outer box body, so that the bottom surface of the lower opening structure is evenly stored in the rolling shutter box;

[0028] When the fireproof roller shutter is unfolded and the lower opening structure is lowered, the adjustment mechanism is adjusted accordingly based on the wind force inside and outside the fireproof roller shutter to adjust the center of gravity of the lower opening structure to ensure that the fireproof roller shutter is unfolded vertically and the lower opening structure is horizontal.

[0029] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0030] 1. When the fireproof rolling curtain is folded and the lower opening structure is stored, the door body is opened, and the relative positions of the upper brackets and adjusting parts of the adjusting mechanisms on both sides are adjusted, and then the relative position of the inner box body in the outer shell is adjusted, so that the bottom surface of the lower opening structure is flatly stored in the rolling curtain box; when the fireproof rolling curtain is unfolded and the lower opening structure is lowered, the adjusting mechanism is adjusted accordingly based on the wind force inside and outside the fireproof rolling curtain, and the center of gravity of the lower opening structure is adjusted to ensure that the fireproof rolling curtain is vertically unfolded and the lower opening structure is horizontal. In this way, the flatness and center of gravity of the end surface of the lower opening structure are adjusted to meet the requirements of the fireproof rolling curtain under different usage conditions.

[0031] 2. When the connection between the adjusting member and the upper bracket is inclined to each other, the relatively lower side of the nut will squeeze the abutment flap, causing it to flip relative to the upper bracket to support the nut and prevent it from loosening, and the above structure is elastically pre-tightened by the elastic member. At the same time, the second stud is inclined to the axis of the second assembly hole. The arc-shaped structure design of the second assembly hole enables the second stud to stably abut against the second assembly hole at any inclination angle; through the arrangement design of a plurality of balls, the sliding resistance between the adjusting member and the guide plate can be reduced, making the adjustment of the adjusting mechanism more labor-saving, and the adjusting member can stably abut against the ball at the corresponding position at any inclination angle, further improving the stability of the adjusting member and the adjusting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 The figure is a cross-sectional view of the assembly structure of an assembled fireproof roller shutter bottom structure.

[0034] Figure 2 The figure is a schematic diagram of the internal structure of the lower opening structure of an assembled fireproof rolling shutter.

[0035] Figure 3 The present invention is a structural schematic diagram of the connection node between the adjusting member and the upper bracket in the lower opening structure of an assembled fireproof rolling shutter.

[0036] Figure 4 The present invention is a structural schematic diagram of a connection node between an adjusting member and a guide plate in a lower opening structure of an assembled fireproof rolling shutter.

[0037] Legend:

[0038] 1. Outer shell; 11. Countersunk door groove; 12. Door body; 13. Locking knob; 14. Inner side plate; 15. Guide plate; 16. First assembly hole; 17. Ball groove; 18. Ball; 2. Inner box body; 3. Upper bracket; 31. Second assembly hole; 32. Groove; 33. Abutment flap; 34. Elastic member; 35. Avoidance hole; 4. Adjustment member; 41. First stud; 42. Second stud; 100. Inner fireproof roller shutter; 200. Outer fireproof roller shutter; 300. Roller shutter box; 310. Retractable and retractable roller shutter assembly; 320. Partition; 330. Equipment cavity; 340. Storage cavity; 350. Avoidance opening. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters refer to similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in the subsequent drawings.

[0042] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Embodiment 1:

[0045] See also Figure 1-2 The present invention provides a technical solution: an assembled fireproof roller shutter bottom structure, comprising:

[0046] The outer shell 1 has two sides of the top thereof connected to the inner fireproof rolling curtain 100 and the outer fireproof rolling curtain 200 respectively, and the inner fireproof rolling curtain 100 and the outer fireproof rolling curtain 200 are connected to the retractable and unreeling assembly 310 in the rolling curtain box 300, and the outer shell 1 is detachably provided with a door body 12;

[0047] The inner box body 2 is inserted into the cavity opened at the bottom of the outer box body 1;

[0048] The adjusting mechanism comprises an upper bracket 3 and an adjusting member 4 in the cavity. The ends of the adjusting member 4 are respectively passed through the second assembly holes 31 of the inner box body 2 and the upper bracket 3 for locking and positioning.

[0049] Among them, the fireproof roller shutter adopts a double-curtain dual-drive structure, and the specific structure of the roller shutter box 300 is as follows: a partition 320 is set in the inner cavity of the roller shutter box 300, and the partition 320 divides the inner cavity into an equipment cavity 330 and a storage cavity 340 distributed up and down. The two retractable and unreeling components 310 are arranged in the equipment cavity 330 and are respectively wound and docked with the inner fireproof roller shutter 100 and the outer fireproof roller shutter 200, which include a roller and a rotary drive motor. The inner fireproof roller shutter 100 and the outer fireproof roller shutter 200 are respectively inserted into the avoidance opening 350 at the corresponding position of the partition 320, and the outer shell 1 is stored in the storage cavity 340.

[0050] The outer shell 1 is provided with a countersunk door groove 11 on the outer side of the inner fireproof roller shutter 100 and the outer fireproof roller shutter 200, and the stepped door body 12 is embedded in the countersunk door groove 11. The outer shell 1 is provided with a locking knob 13 and a rotating shaft, and the locking knob 13 is eccentrically rotated on the rotating shaft, and it presses and positions the door body 12. In this way, the inner cavity of the lower mouth structure can be opened or closed conveniently. When in use, the locking knob 13 is turned to rotate along the rotating shaft, and its relatively long end is separated from the door body 12, and the door body 12 can be taken out, so that the countersunk door groove 11 is opened. When closing, the locking knob 13 is turned in the opposite direction to press its end onto the door body 12 again. The operation is simple and convenient.

[0051] The upper bracket 3 is an angle bracket, which is assembled on the inner plate 14 at the top of the cavity by a plurality of dovetail screws, thereby improving the connection strength between the adjustment mechanism and the outer shell 1.

[0052] The adjusting member 4 is a screw rod, and the first stud 41 and the second stud 42 at the end thereof are screwed with a nut. The first stud 41 and the second stud 42 are respectively inserted into the inner box body 2 and the upper bracket 3, and the nut abuts against the end faces of the inner box body 2 and the upper bracket 3. The inner box body 2 is an aluminum plate structure with an opening at the top. When adjusting the relative position of the inner box body 2 in the outer shell 1, first unscrew the nut on the adjustment mechanism on the corresponding side, move the adjusting member 4 up and down, adjust its height with one side of the inner box body 2, and re-tighten the nut. The other side is adjusted in the same way, thereby achieving the flatness of the end face of the lower opening structure and the center of gravity adjustment to meet the requirements of the fire shutter under different usage conditions.

[0053] A guide plate 15 is further extended horizontally or obliquely on the side wall of the cavity, and the adjusting member 4 is passed through the first assembly hole 16 of the guide plate 15 to improve the stability of the adjusting mechanism.

[0054] A process for leveling the lower opening structure of an assembled fireproof rolling shutter comprises the following steps:

[0055] When the fireproof rolling shutter is rolled up and the lower opening structure is stored, the door body 12 is opened, and the relative positions of the upper brackets 3 and the adjusting members 4 of the adjusting mechanisms on both sides are adjusted, thereby adjusting the relative position of the inner box body 2 in the outer shell 1, so that the bottom surface of the lower opening structure is smoothly stored in the storage cavity 340 of the rolling shutter box 300;

[0056] When the fireproof roller shutter is unfolded and the lower opening structure is lowered, the adjustment mechanism is adjusted accordingly based on the wind force inside and outside the fireproof roller shutter to adjust the center of gravity of the lower opening structure to ensure that the fireproof roller shutter is unfolded vertically and the lower opening structure is horizontal.

[0057] Embodiment 2:

[0058] See also Figure 3, considering that the outer shell 1 and the inner box body 2 are relatively tilted when the adjustment mechanisms on both sides are operated, the connection between the adjustment member 4 and the upper bracket 3 is also tilted to each other, and the stability of this structural state is insufficient. Therefore, on the basis of the above-mentioned embodiment 1, preferably, the longitudinal section of the second assembly hole 31 is an arc-shaped structure with a size gradually increasing from the center to the outside, and a groove 32 is arranged on the outside thereof, and an abutting flap 33 abutting on the nut is movably arranged on the groove 32, and an elastic member 34 is arranged between the groove 32 and the abutting flap 33, and the end of the adjustment member 4 is penetrated on the avoidance hole 35 of the abutting flap 33, and the size of the avoidance hole 35 gradually increases from the inside to the outside. Therefore, when the connection between the adjusting member 4 and the upper bracket 3 is inclined to each other, the relatively lower side of the nut will squeeze the abutment flap 33, causing it to flip relative to the upper bracket 3 to support the nut and prevent it from loosening, and the elastic member 34 is used to elastically pre-tighten the above structure. At the same time, the second stud 42 is inclined to the axis of the second assembly hole 31. The arc-shaped structure design of the second assembly hole 31 enables the second stud 42 to stably abut against the second assembly hole 31 regardless of the inclination angle.

[0059] Embodiment three:

[0060] See also Figure 4 , considering that the outer shell 1 and the inner box body 2 are relatively tilted when the adjustment mechanisms on both sides are operated, the connection between the adjustment member 4 and the guide plate 15 is also tilted to each other, and the stability of this structural state is insufficient. Therefore, based on the above-mentioned embodiment 1, preferably, a plurality of ball grooves 17 are arranged axially and circumferentially on the side wall of the first assembly hole 16, and balls 18 are embedded in the ball grooves 17. The size of the balls 18 gradually decreases from the center to the outside of the first assembly hole 16. Through the arrangement design of the plurality of balls 18, the sliding resistance between the adjustment member 4 and the guide plate 15 can be reduced, making the adjustment of the adjustment mechanism more labor-saving, and the adjustment member 4 can stably abut against the balls 18 at the corresponding position regardless of the tilt angle, further improving the stability of the adjustment member 4 and the adjustment mechanism.

[0061] In summary, due to the adoption of the above technical solution, the assembled fireproof roller shutter bottom opening structure and the leveling process thereof in this embodiment have the following beneficial effects compared with the prior art:

[0062] 1. When the fireproof rolling curtain is folded and the lower opening structure is stored, the door body is opened, and the relative positions of the upper brackets and adjusting parts of the adjusting mechanisms on both sides are adjusted, and then the relative position of the inner box body in the outer shell is adjusted, so that the bottom surface of the lower opening structure is flatly stored in the rolling curtain box; when the fireproof rolling curtain is unfolded and the lower opening structure is lowered, the adjusting mechanism is adjusted accordingly based on the wind force inside and outside the fireproof rolling curtain, and the center of gravity of the lower opening structure is adjusted to ensure that the fireproof rolling curtain is vertically unfolded and the lower opening structure is horizontal. In this way, the flatness and center of gravity of the end surface of the lower opening structure are adjusted to meet the requirements of the fireproof rolling curtain under different usage conditions.

[0063] 2. When the connection between the adjusting member and the upper bracket is inclined to each other, the relatively lower side of the nut will squeeze the abutment flap, causing it to flip relative to the upper bracket to support the nut and prevent it from loosening, and the above structure is elastically pre-tightened by the elastic member. At the same time, the second stud is inclined to the axis of the second assembly hole. The arc-shaped structure design of the second assembly hole enables the second stud to stably abut against the second assembly hole at any inclination angle; through the arrangement design of a plurality of balls, the sliding resistance between the adjusting member and the guide plate can be reduced, making the adjustment of the adjusting mechanism more labor-saving, and the adjusting member can stably abut against the ball at the corresponding position at any inclination angle, further improving the stability of the adjusting member and the adjusting mechanism.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An assembled fireproof roller shutter lower opening structure, characterized in that: include: The outer shell has two sides of the top thereof connected to the inner fireproof rolling shutter and the outer fireproof rolling shutter respectively, the inner fireproof rolling shutter and the outer fireproof rolling shutter are connected to the retractable and unreeling components in the rolling shutter box, and the outer shell is detachably provided with a door body; An inner box body, which is inserted into the cavity opened at the bottom of the outer box body; The adjusting mechanism comprises an upper bracket and an adjusting member in the cavity, and the ends of the adjusting member are respectively passed through the second assembly holes of the inner box body and the upper bracket for locking and positioning.

2. The assembled fireproof roller shutter bottom structure according to claim 1, characterized in that: A partition is provided in the inner cavity of the rolling shutter box, and the partition divides the inner cavity into an equipment cavity and a storage cavity distributed up and down. The two retractable and retractable rolling assemblies are arranged in the equipment cavity and are respectively wound and docked with the inner fireproof rolling shutter and the outer fireproof rolling shutter, and they include rollers and a rotary drive motor. The inner fireproof rolling shutter and the outer fireproof rolling shutter are respectively passed through the avoidance openings at the corresponding positions of the partition, and the outer shell is stored in the storage cavity.

3. The assembled fireproof roller shutter bottom structure according to claim 1, characterized in that: The outer shell is provided with countersunk door grooves on the outer sides of the inner fireproof roller shutter and the outer fireproof roller shutter, and the stepped door body is embedded in the countersunk door grooves. A locking knob and a rotating shaft are provided on the outer shell, and the locking knob is eccentrically rotated on the rotating shaft to press and position the door body.

4. The assembled fireproof roller shutter bottom structure according to claim 1, characterized in that: The upper bracket is an angle bracket, which is assembled on the inner side plate at the top of the cavity by a plurality of dovetail screws.

5. The assembled fireproof roller shutter bottom structure according to claim 1, characterized in that: The adjusting member is a screw rod, and the first stud and the second stud at the end thereof are screwed together with a nut. The first stud and the second stud are respectively passed through the inner box body and the upper bracket. The nut abuts against the end surfaces of the inner box body and the upper bracket. The inner box body is an aluminum plate structure with an opening on the top.

6. The assembled fireproof roller shutter bottom structure according to claim 5, characterized in that: The longitudinal section of the second assembly hole is an arc-shaped structure whose size gradually increases from the center to the outside, and a groove is arranged on the outside. An abutment flap that abuts against the nut is movably arranged on the groove, and an elastic member is arranged between the groove and the abutment flap. The end of the adjusting member is passed through the avoidance hole of the abutment flap, and the size of the avoidance hole gradually increases from the inside to the outside.

7. The assembled fireproof roller shutter bottom structure according to claim 1, characterized in that: A guide plate is also extended horizontally or obliquely on the side wall of the cavity, and the adjusting member is inserted through the first assembly hole of the guide plate.

8. The assembled fireproof roller shutter bottom structure according to claim 7, characterized in that: A plurality of ball grooves are arranged on the side wall of the first assembly hole at intervals in the axial direction and the circumferential direction, and balls are embedded in the ball grooves.

9. The assembled fireproof roller shutter bottom structure according to claim 8, characterized in that: The size of the ball gradually decreases from the center to the outside of the first assembly hole.

10. The leveling process corresponding to the lower opening structure of the assembled fireproof rolling shutter according to claim 1 is characterized in that: The following steps are involved: When the fireproof rolling shutter is retracted and the lower opening structure is stored, the door body is opened, and the relative positions of the upper brackets and the adjusting members of the adjusting mechanisms on both sides are adjusted, thereby adjusting the relative position of the inner box body in the outer box body, so that the bottom surface of the lower opening structure is evenly stored in the rolling shutter box; When the fireproof roller shutter is unfolded and the lower opening structure is lowered, the adjustment mechanism is adjusted accordingly based on the wind force inside and outside the fireproof roller shutter to adjust the center of gravity of the lower opening structure to ensure that the fireproof roller shutter is unfolded vertically and the lower opening structure is horizontal.

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