A double-layer steel grille structure for a roof and its construction method

Abstract

The present application discloses a double-layer steel grille structure for a roof and its construction method, which includes an upper steel grille, a suspension rod and a lower steel grille. A fixing plate is fixed at the lower end of the suspension rod. Fixing components for quickly fixing the lower steel grille are arranged on both sides of the fixing plate. The fixing component includes a fixing rod fixed to the side wall of the fixing plate, a positioning drag rod penetrating through the fixing rod and slidably connected to the fixing rod, a baffle plate fixed to one end of the positioning drag rod, and a first spring sleeved on the positioning drag rod. Both ends of the first spring are respectively fixed to the fixing rod and the baffle plate. Yielding inclined surfaces are arranged at the ends of the two positioning drag rods close to each other. The bottom surface of the fixing plate, the two positioning drag rods and the two fixing rods cooperate to fix the lower steel grille. The present application changes the way of using multiple groups of bolts for fixing in the traditional technology, and improves the installation efficiency of the staff for the lower steel grille.

Description

Technical Field

[0001] The present invention relates to the technical field of steel grid structure installation, and particularly relates to a double-layer steel grid structure for a roof and a construction method thereof. Background Art

[0002] The top of the stage tower of a theater is a steel grid roof. To meet the requirements of stage art props lighting, wire walking, and curtain arrangement, a double-layer steel structure grid is used as a hanging point under the steel grid roof. Most of the existing large theaters are multi-story ultra-high hanging steel structures, and their stage roofs are composed of a combination of steel structures and concrete. In the construction of multi-story ultra-high hanging steel structures, there are characteristics such as large span, high support height required for installation, lack of working face during the installation process, complex three-dimensional cross-construction, and high installation accuracy requirements.

[0003] When a double-layer steel structure grid is used as a hanging point under the steel grid roof, the connection between the two layers of the steel structure grid relies on vertical suspension rods for connection. All the steel beam connection methods are bolt connections. Multiple connection points between the lower steel grid and the upper steel grid are connected by bolts, which prolongs the time for workers to install the lower steel grid and is not conducive to improving the construction efficiency. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a double-layer steel grid structure for a roof and a construction method thereof.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A double-layer steel grid structure for a roof, including an upper steel grid, a suspension rod fixed to the bottom of the upper steel grid, and a lower steel grid connected to the lower end of the suspension rod. A fixing plate is fixed to the lower end of the suspension rod. Fixing components for quickly fixing the lower steel grid are arranged on both sides of the fixing plate. The fixing components include a fixing rod fixed to the side wall of the fixing plate, a positioning drag rod penetrating through the fixing rod and slidably connected to the fixing rod, a baffle fixed to one end of the positioning drag rod, and a first spring sleeved on the positioning drag rod. Both ends of the first spring are fixed to the fixing rod and the baffle respectively. Yielding inclined surfaces are arranged at the ends of the two positioning drag rods close to each other. The bottom surface of the fixing plate, the two positioning drag rods, and the two fixing rods cooperate to fix the lower steel grid.

[0007] By adopting the above technical solution, when installing the lower steel grid on the suspension rod at the lower end of the upper steel grid, the worker only needs to align the lower steel grid with the two fixing rods in multiple groups of fixing components, and push the lower steel grid from bottom to top. The yielding inclined surface on the positioning drag rod is pushed out to both sides by the lower steel grid. When the top of the lower steel grid abuts against the bottom surface of the fixing plate, the positioning drag rod resets under the elastic force of the first spring, changing the traditional method of using multiple groups of bolts for fixing, and improving the installation efficiency of the worker for the lower steel grid.

[0008] Furthermore, a first through hole is formed on the fixing rod for the positioning rod to pass through, and a locking mechanism for locking the positioning rod is installed on the fixing rod and the positioning rod, and the locking mechanism includes a locking component and an abutment component;

[0009] A mounting groove is provided in the fixing rod, a connecting hole connecting the mounting groove and the first through hole is provided on the fixing rod, the locking assembly includes a slide plate slidably connected to the inner wall of the mounting groove, a second spring fixed to the upper surface of the slide plate, and a positioning rod fixed to the bottom surface of the slide plate and slidably connected to the connecting hole, a through hole is provided on the top of the positioning drag rod for the positioning rod to pass through, and the interference assembly is used to push the positioning rod out of the through hole.

[0010] By adopting the above technical solution, when the lower steel grating is installed, under the elastic force of the second spring, the positioning rod passes through the through hole, and the positioning rod plays a good positioning role on the positioning drag rod, thereby enhancing the stability of the positioning drag rod during use.

[0011] Furthermore, the lower end of the positioning rod is hemispherical, and the abutment assembly includes a movable rod that is penetrated and slidably connected to the positioning rod, a sphere fixed to one end of the movable rod, an ellipsoid fixedly sleeved on the movable rod, and a third spring sleeved on the movable rod;

[0012] The movable rod passes through the baffle and is slidably connected to the baffle, the sphere is located at the end of the movable rod away from the baffle, the ellipsoid is located between the positioning rod and the sphere, and a movable hole for the ellipsoid to move is provided at the end of the positioning rod away from the baffle, and an movable cavity for accommodating a third spring is provided in the positioning rod near the baffle. The resistance assembly also includes a movable plate slidably connected to the movable cavity, and both ends of the third spring are respectively fixed to the inner wall of the movable cavity and the side wall of the movable plate.

[0013] By adopting the above technical solution, during the installation of the lower steel grating, the ellipsoid is located between the positioning rod and the sphere, pushing the lower steel grating from bottom to top, and the yielding inclined surface on the positioning drag rod is pushed out to both sides by the lower steel grating. After the ellipsoid hits the hemispherical surface at the lower end of the positioning rod, the positioning rod and the slide plate move upward until the lower end of the positioning rod is completely moved out of the perforation, and the positioning drag rod completely enters the first through hole. Subsequently, the positioning drag rod and the positioning rod are reset, which enhances the stability of the positioning drag rod and the lower steel grating during use. When disassembling the lower steel grating, the staff only needs to pull the baffle to make the ellipsoid hit the lower end of the positioning rod again, and make the positioning rod completely out of the perforation. After the positioning drag rod completely enters the first through hole, the staff can easily disassemble the lower steel grating.

[0014] Furthermore, a pressing groove is formed at one end of the movable rod away from the spherical body.

[0015] Furthermore, installation notches are provided at the intersections of the two sides of the positioning rod and the yielding inclined surfaces, and a reinforcing assembly for strengthening the supporting effect of the positioning rod is provided in the installation notch, and the reinforcing assembly includes a rotating rod rotatably installed on the inner wall of the installation notch, a reinforcing plate provided on the rotating rod and fixed to the rotating rod, an end plate fixed to one end of the rotating rod away from the inner wall of the installation notch, and a torsion spring sleeved on the rotating rod, yielding portions are provided at positions where the reinforcing plates on both sides are close to each other, and the bottoms of the reinforcing plates on both sides are arc-shaped surfaces, one end of the torsion spring is fixed to the side wall of the reinforcing plate, and the other end of the torsion spring is fixed to the end plate, and a second through hole for the rotating reinforcing plate to pass through is provided on the fixed rod.

[0016] By adopting the above technical solution, during the installation of the lower steel grating, the reinforcing plate is lifted up by the lower steel grating and rotates around the rotating rod, the second through hole gives way to the reinforcing plate, and finally the reinforcing plate is reset under the torsion force of the torsion spring, and the upper surface of the reinforcing plate abuts against the top of the lower steel grating. The setting of the reinforcing plate enhances the supporting effect of the positioning drag rod on the lower steel grating.

[0017] Furthermore, a rubber plate is fixed on the giving way portion, and the rubber plates on both sides abut against each other.

[0018] By adopting the above technical solution and arranging the rubber plate, the stability of the reinforcing plate during use is enhanced.

[0019] Furthermore, a transverse plate is fixed to the side wall of the installation notch, a rubber sheet is fixed to the bottom surface of the transverse plate, and a stop plate is integrally formed at the position corresponding to the transverse plate of the reinforcing plate.

[0020] By adopting the above technical solution, the stop plate cooperates with the torsion spring to keep the reinforcing plate in a fixed posture during use. The provision of the rubber sheet reduces the impact force between the reinforcing plate and the stop plate during the process of resetting under the action of the torsion spring.

[0021] A construction method for a double-layer steel grille structure for a roof comprises the following steps:

[0022] Align the lower steel grating with the two fixed rods in the multiple sets of fixed components, push the lower steel grating from bottom to top, and the yielding inclined surface on the positioning drag rod is pushed out to both sides by the lower steel grating. After the top of the lower steel grating abuts against the bottom surface of the fixed plate, the positioning drag rod is reset under the elastic force of the first spring. In addition, in this process, the reinforcing plate is lifted up by the lower steel grating and rotates around the rotating rod, and the second through hole gives way to the reinforcing plate. Finally, the reinforcing plate is reset under the torsion of the torsion spring, and the upper surface of the positioning drag rod and the upper surface of the reinforcing plate are both abutted against the top of the lower steel grating.

[0023] In summary, the present invention has the following beneficial effects:

[0024] 1. In the present application, when installing the lower steel grating on the suspension rod at the lower end of the upper steel grating, the staff only needs to align the lower steel grating with the two fixing rods in the multiple fixing components, and push the lower steel grating from bottom to top. The yielding inclined surface on the positioning drag rod is pushed out to both sides by the lower steel grating. After the top of the lower steel grating abuts against the bottom surface of the fixing plate, the positioning drag rod is reset under the elastic force of the first spring, which changes the traditional method of using multiple sets of bolts for fixing, and improves the efficiency of the staff in installing the lower steel grating.

[0025] 2. In the present application, during the installation of the lower steel grating, the ellipsoid is located between the positioning rod and the sphere, pushing the lower steel grating from bottom to top, and the yielding slope on the positioning rod is pushed out to both sides by the lower steel grating. After the ellipsoid hits the hemispherical surface of the lower end of the positioning rod, the positioning rod and the slide plate both move upward until the lower end of the positioning rod is completely moved out of the perforation, and the positioning rod completely enters the first through hole. Subsequently, the positioning rod and the positioning rod are reset, which enhances the stability of the positioning rod and the lower steel grating during use. When disassembling the lower steel grating, the staff only needs to pull the baffle to make the ellipsoid hit the lower end of the positioning rod again, and make the positioning rod completely detach from the perforation. After the positioning rod completely enters the first through hole, the staff can easily disassemble the lower steel grating;

[0026] 3. In the present application, during the installation of the lower steel grating, the reinforcing plate is lifted up by the lower steel grating and rotates around the rotating rod, the second through hole gives way to the reinforcing plate, and finally the reinforcing plate is reset under the torsion of the torsion spring, and the upper surface of the reinforcing plate abuts against the top of the lower steel grating. The setting of the reinforcing plate enhances the supporting effect of the positioning drag rod on the lower steel grating. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0028] Figure 2 is a cross-sectional view of an embodiment of the present invention for highlighting the locking mechanism;

[0029] Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle;

[0030] Figure 4 is a schematic diagram of the fixing plate and its connection structure;

[0031] Figure 5 yes Figure 4 A magnified schematic diagram of point B in the middle.

[0032] In the figure: 1. Upper steel grille; 2. Suspension rod; 21. Fixed plate; 3. Lower steel grille; 4. Fixing component; 41. Fixed rod; 411. First through hole; 412. Installation groove; 413. Connection hole; 414. Second through hole; 42. Positioning drag rod; 421. Yielding inclined plane; 422. Perforation; 423. Moving hole; 424. Moving cavity; 43. Baffle; 44. First spring; 5. Locking mechanism; 6. Locking component; 61. Slide plate; 62. Second spring; 63. Positioning rod; 7. Contact component; 71. Moving rod; 711. Pressing groove; 72. Sphere; 73. Ellipsoid; 74. Third spring; 75. Moving plate; 8. Installation notch; 81. Horizontal plate; 811. Rubber sheet; 9. Reinforcing component; 91. Rotating rod; 92. Reinforcing plate; 921. Yielding part; 922. Stopper; 93. End plate; 94. Torsion spring; 10. Rubber plate. Embodiment

[0033] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0034] The embodiment of the present application discloses a double-layer steel grille structure for a roof and its construction method.

[0035] As Figures 1 to 5 shown, the double-layer steel grille structure for the roof includes an upper steel grille 1, a suspension rod 2 fixed to the bottom of the upper steel grille 1, and a lower steel grille 3 connected to the lower end of the suspension rod 2. A fixed plate 21 is fixed to the lower end of the suspension rod 2, and fixing components 4 for quickly fixing the lower steel grille 3 are arranged on both sides of the fixed plate 21.

[0036] The fixing component 4 includes a fixed rod 41 fixed to the side wall of the fixed plate 21, a positioning drag rod 42 penetrating through the fixed rod 41 and slidably connected to the fixed rod 41, a baffle 43 fixed to one end of the positioning drag rod 42, and a first spring 44 sleeved on the positioning drag rod 42. Wherein, both ends of the first spring 44 are fixed to the fixed rod 41 and the baffle 43 respectively, and yielding inclined planes 421 are arranged at the ends of the two positioning drag rods 42 close to each other. The bottom surface of the fixed plate 21, the two positioning drag rods 42 and the two fixed rods 41 cooperate to fix the lower steel grille 3.

[0037] When installing the lower steel grating 3 on the suspension rod 2 at the lower end of the upper steel grating 1, the staff only needs to align the lower steel grating 3 with the two fixing rods 41 in the multiple sets of fixing components 4, push the lower steel grating 3 from bottom to top, and the yielding inclined surfaces 421 on the positioning drag rod 42 are pushed out to both sides by the lower steel grating 3. After the top of the lower steel grating 3 abuts against the bottom surface of the fixing plate 21, the positioning drag rod 42 is reset under the elastic force of the first spring 44, which changes the traditional method of using multiple sets of bolts for fixing, and improves the efficiency of the staff in installing the lower steel grating 3.

[0038] A first through hole 411 is formed on the fixed rod 41 for the positioning rod 42 to pass through, and a locking mechanism 5 for locking the positioning rod 42 is installed on the fixed rod 41 and the positioning rod 42 together, and the locking mechanism 5 includes a locking component 6 and a resistance component 7; a mounting groove 412 is formed in the fixed rod 41, and a connecting hole 413 connecting the mounting groove 412 and the first through hole 411 is formed on the fixed rod 41, and the locking component 6 includes a slide plate 61 slidably connected to the inner wall of the mounting groove 412, a second spring 62 fixed to the upper surface of the slide plate 61, and a positioning rod 63 fixed to the bottom surface of the slide plate 61 and slidably connected to the connecting hole 413, a through hole 422 is formed on the top of the positioning rod 42 for the positioning rod 63 to pass through, and the resistance component 7 is used to push the positioning rod 63 out of the through hole 422. When the lower steel grid 3 is installed, the positioning rod 63 passes through the through hole 422 under the elastic force of the second spring 62, and the positioning rod 63 plays a good positioning role on the positioning drag rod 42, thereby enhancing the stability of the positioning drag rod 42 during use.

[0039] The lower end of the positioning rod 63 is hemispherical, and the abutment assembly 7 includes a movable rod 71 that is penetrated and slidably connected to the positioning rod 42, a sphere 72 fixed to one end of the movable rod 71, an ellipsoid 73 fixedly sleeved on the movable rod 71, and a third spring 74 sleeved on the movable rod 71;

[0040] A pressing groove 711 is provided at the end of the movable rod 71 away from the baffle 43, the movable rod 71 passes through the baffle 43 and is slidably connected to the baffle 43, the sphere 72 is located at the end of the movable rod 71 away from the baffle 43, the ellipsoid 73 is located between the positioning rod 63 and the sphere 72, and a movable hole 423 for the ellipsoid 73 to move is provided at the end of the positioning drag rod 42 away from the baffle 43, and an active cavity 424 for accommodating a third spring 74 is provided in the positioning drag rod 42 near the baffle 43. The abutment assembly 7 also includes a movable plate 75 slidably connected to the active cavity 424, and two ends of the third spring 74 are respectively fixed to the inner wall of the active cavity 424 and the side wall of the movable plate 75. During the installation of the lower steel grating 3, the ellipsoid 73 is located between the positioning rod 63 and the sphere 72, pushing the lower steel grating 3 from bottom to top, and the yielding inclined surface 421 on the positioning drag rod 42 is pushed out to both sides by the lower steel grating 3. After the ellipsoid 73 abuts against the hemispherical surface at the lower end of the positioning rod 63, the positioning rod 63 and the slide plate 61 both move upward until the lower end of the positioning rod 63 completely moves out of the perforation 422, and the positioning drag rod 42 completely enters the first through hole 411. Subsequently, the positioning drag rod 42 and the positioning rod 63 are both reset, which enhances the stability of the positioning drag rod 42 and the lower steel grating 3 during use. When disassembling the lower steel grating 3, the staff only needs to pull the baffle 43, so that the ellipsoid 73 abuts against the lower end of the positioning rod 63 again, and the positioning rod 63 is completely separated from the perforation 422. After the positioning drag rod 42 completely enters the first through hole 411, the staff can easily disassemble the lower steel grating 3.

[0041] Installation notches 8 are provided at the intersections of the two sides of the positioning drag rod 42 and the yielding inclined surfaces 421. A reinforcing assembly 9 for strengthening the supporting effect of the positioning drag rod 42 is provided in the installation notch 8. The reinforcing assembly 9 includes a rotating rod 91 rotatably installed on the inner wall of the installation notch 8, a reinforcing plate 92 provided on the rotating rod 91 and fixed to the rotating rod 91, an end plate 93 fixed to one end of the rotating rod 91 away from the inner wall of the installation notch 8, and a torsion spring 94 sleeved on the rotating rod 91. Yielding portions 921 are provided at positions where the reinforcing plates 92 on both sides are close to each other. The bottoms of the reinforcing plates 92 on both sides are both arc-shaped surfaces. One end of the torsion spring 94 is fixed to the side wall of the reinforcing plate 92, and the other end of the torsion spring 94 is fixed to the end plate 93. A second through hole 414 for the rotating reinforcing plate 92 to pass through is provided on the fixed rod 41. During the installation of the lower steel grating 3, the reinforcing plate 92 is lifted up by the lower steel grating 3 and rotates around the rotating rod 91, and the second through hole 414 makes way for the reinforcing plate 92. Finally, the reinforcing plate 92 is reset under the torsion of the torsion spring 94, and the upper surface of the reinforcing plate 92 abuts against the top of the lower steel grating 3. The setting of the reinforcing plate 92 enhances the supporting effect of the positioning drag rod 42 on the lower steel grating 3.

[0042] In this embodiment, a rubber plate 10 is fixed on the yielding portion 921, and the rubber plates 10 on both sides abut against each other. A horizontal plate 81 is fixed to the side wall of the installation notch 8, a rubber sheet 811 is fixed to the bottom surface of the horizontal plate 81, and a stop plate 43 is integrally formed at the position corresponding to the reinforcing plate 92 and the horizontal plate 81. The stop plate 43 cooperates with the torsion spring 94 to keep the reinforcing plate 92 in a fixed posture during use. The provision of the rubber sheet 811 reduces the impact force between the reinforcing plate 92 and the stop plate 43 during the process of resetting under the action of the torsion spring 94.

[0043] The present embodiment also discloses a construction method for a double-layer steel grating structure for a roof, comprising the following steps: aligning the lower steel grating 3 with two fixed rods 41 in the multiple groups of fixed components 4, pushing the lower steel grating 3 from bottom to top, and the yielding inclined surface 421 on the positioning drag rod 42 is pushed out to both sides by the lower steel grating 3. After the top of the lower steel grating 3 abuts against the bottom surface of the fixed plate 21, the positioning drag rod 42 is reset under the elastic force of the first spring 44. In addition, during this process, the reinforcing plate 92 is lifted up by the lower steel grating 3 and rotates around the rotating rod 91, and the second through hole 414 gives way to the reinforcing plate 92. Finally, the reinforcing plate 92 is reset under the torsion of the torsion spring 94, and the upper surface of the positioning drag rod 42 and the upper surface of the reinforcing plate 92 are both abutted against the top of the lower steel grating 3.

[0044] The use principle of this embodiment is:

[0045] When installing the lower steel grating 3 on the suspension rod 2 at the lower end of the upper steel grating 1, the staff only needs to align the lower steel grating 3 with the two fixing rods 41 in the multiple sets of fixing components 4, push the lower steel grating 3 from bottom to top, and the yielding inclined surfaces 421 on the positioning drag rod 42 are pushed out to both sides by the lower steel grating 3. After the top of the lower steel grating 3 abuts against the bottom surface of the fixing plate 21, the positioning drag rod 42 is reset under the elastic force of the first spring 44, which changes the traditional method of using multiple sets of bolts for fixing, and improves the efficiency of the staff in installing the lower steel grating 3.

[0046] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A double-layer steel grille structure for a roof, comprising an upper steel grille (1), a suspension rod (2) fixed to the bottom of the upper steel grille (1), and a lower steel grille (3) connected to the lower end of the suspension rod (2), Its characteristics are: A fixing plate (21) is fixed at the lower end of the suspension rod (2), and fixing components (4) are arranged on both sides of the fixing plate (21) for quickly fixing the lower steel grille (3). The fixing components (4) include a fixing rod (41) fixed to the side wall of the fixing plate (21), a positioning rod (42) penetrating the fixing rod (41) and slidably connected to the fixing rod (41), a baffle (43) fixed to one end of the positioning rod (42), and a first spring (44) sleeved on the positioning rod (42), wherein the two ends of the first spring (44) are respectively connected to the fixing rod (41) and the baffle (43). 43) fixed, the ends of the positioning rods (42) on both sides close to each other are both provided with a giving way inclined surface (421), the bottom surface of the fixing plate (21), the two positioning rods (42) and the two fixing rods (41) cooperate and fix the lower steel grid (3), the fixing rods (41) are penetrated with a first through hole (411) for the positioning rods (42) to pass through, the fixing rods (41) and the positioning rods (42) are jointly installed with a locking mechanism (5) for locking the positioning rods (42), and the locking mechanism (5) includes a locking component (6) and an abutment component (7); The fixing rod (41) is provided with a mounting groove (412), the fixing rod (41) is provided with a connecting hole (413) connecting the mounting groove (412) and the first through hole (411), the locking assembly (6) comprises a slide plate (61) slidably connected to the inner wall of the mounting groove (412), a second spring (62) fixed to the upper surface of the slide plate (61), and a positioning rod (63) fixed to the bottom surface of the slide plate (61) and slidably connected to the connecting hole (413), the top of the positioning drag rod (42) is provided with a fixing rod (63) for fixing The positioning rod (63) passes through a through hole (422), the abutment assembly (7) is used to push the positioning rod (63) out of the through hole (422), the lower end of the positioning rod (63) is hemispherical, and the abutment assembly (7) comprises a movable rod (71) penetrating the positioning rod (42) and slidably connected to the positioning rod (42), a sphere (72) fixed to one end of the movable rod (71), an ellipsoid (73) fixedly sleeved on the movable rod (71), and a third spring (74) sleeved on the movable rod (71); The movable rod (71) passes through the baffle (43) and is slidably connected to the baffle (43); the sphere (72) is located at the end of the movable rod (71) away from the baffle (43); the ellipsoid (73) is located between the positioning rod (63) and the sphere (72); an movable hole (423) for the ellipsoid (73) to move is provided at the end of the positioning rod (42) away from the baffle (43); an movable cavity (424) for accommodating a third spring (74) is provided in the positioning rod (42) at a position close to the baffle (43); the abutment assembly (7) further comprises a movable plate (75) slidably connected to the movable cavity (424); and two ends of the third spring (74) are respectively fixed to the inner wall of the movable cavity (424) and the side wall of the movable plate (75).

2. A double-layer steel grid structure for roofing according to claim 1, Its characteristics are: A pressing groove (711) is formed at one end of the movable rod (71) away from the spherical body (72).

3. A double-layer steel grid structure for roofing according to claim 1, Its characteristics are: A mounting notch (8) is provided at the intersection between the two sides of the positioning rod (42) and the yielding inclined surface (421), and a reinforcing assembly (9) for reinforcing the supporting effect of the positioning rod (42) is arranged in the mounting notch (8), and the reinforcing assembly (9) comprises a rotating rod (91) rotatably mounted on the inner wall of the mounting notch (8), a reinforcing plate (92) arranged on the rotating rod (91) and fixed to the rotating rod (91), and a reinforcing plate (92) fixed to one end of the rotating rod (91) away from the inner wall of the mounting notch (8). The reinforcing plates (92) on both sides are provided with a clearance portion (921) at positions where the reinforcing plates (92) on both sides are close to each other, and the bottoms of the reinforcing plates (92) on both sides are arc-shaped surfaces, one end of the torsion spring (94) is fixed to the side wall of the reinforcing plate (92), and the other end of the torsion spring (94) is fixed to the end plate (93), and the fixed rod (41) is provided with a second through hole (414) for the rotating reinforcing plate (92) to pass through.

4. A double-layer steel grid structure for roofing according to claim 3, Its characteristics are: A rubber plate (10) is fixed on the yielding portion (921), and the rubber plates (10) on both sides abut against each other.

5. A double-layer steel grid structure for roofing according to claim 4, Its characteristics are: A transverse plate (81) is fixed to the side wall of the installation notch (8), a rubber sheet (811) is fixed to the bottom surface of the transverse plate (81), and a stop plate (43) is integrally formed at a position corresponding to the reinforcing plate (92) and the transverse plate (81).

6. A construction method for a double-layer steel grid structure for a roof according to any one of claims 1 to 5, Its characteristics are: The steps include: The lower steel grille (3) is aligned with two fixed rods (41) in the plurality of fixed assemblies (4), and the lower steel grille (3) is pushed upward from bottom to top. The yielding inclined surface (421) on the positioning drag rod (42) is pushed out to both sides by the lower steel grille (3). When the top of the lower steel grille (3) abuts against the bottom surface of the fixed plate (21), the positioning drag rod (42) is reset under the elastic force of the first spring (44). In addition, during this process, the reinforcing plate (92) is lifted up by the lower steel grille (3) and rotates around the rotating rod (91). The second through hole (414) yields to the reinforcing plate (92). Finally, the reinforcing plate (92) is reset under the torsion of the torsion spring (94), and the upper surface of the positioning drag rod (42) and the upper surface of the reinforcing plate (92) are both abutted against the top of the lower steel grille (3).

Images