Floor hole cover

Abstract

The application provides a floor reserved hole anti-falling covering device, which comprises a base arranged on the surface of a floor, a driving mechanism for driving two supporting rods to move horizontally in an elevator shaft is arranged on the surface of the base, and a flexible protective net with elasticity is arranged between the two supporting rods; a fixing mechanism for fixing a protective rod is arranged on the surface of the supporting rod; the protective rod is inclined and located in the interior of the elevator shaft, first reinforcing plates are symmetrically arranged on the side walls of the protective rod, and one end of the first reinforcing plate is fixed on the side wall of the fixing shaft; an adjusting mechanism for enabling the protective rod to protect the interior of the elevator shaft which is staggered with the door hole is arranged on one end of the supporting rod. The floor reserved hole anti-falling covering device has the advantages that workers can stand on the floor to protect the elevator shaft in all aspects and accelerate the construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of reserved opening protection technology, and in particular to a fall prevention covering device for reserved openings in floor slabs. Background Technology

[0002] The elevator shaft provides space for the vertical movement of the elevator car and counterweight. It also serves as the installation location for components such as guide rails and buffers, and plays a crucial role in protecting the car, counterweight, and related equipment for safe operation. Elevator shaft protection is a vital safety measure in building construction, designed to prevent falls, falling objects, and other accidents.

[0003] For standard 800kg elevator shaft interior protection, a protective net needs to be installed every two floors and no more than 10m. Since the width and depth of elevator shafts are usually between 2.5m and 3m, and the shaft depth is relatively large, workers need to be hoisted into the elevator shaft for construction, which is inconvenient for installing protective nets. In addition, the doorway size of elevator shafts is usually 1.2m (width) x 2.1m (height). Due to the limitation of the doorway size, the construction space for workers is restricted, making it inconvenient to carry out construction on the inner side of the elevator shaft that is offset from the doorway.

[0004] Therefore, it is necessary to develop a new anti-fall cover device for pre-reserved openings in floor slabs to solve the above-mentioned technical problems. Summary of the Invention

[0005] The technical problem solved by this invention is to provide a fall protection cover for pre-reserved openings in floor slabs, which allows workers to fully protect elevator shafts while standing on the floor slab and speeds up construction efficiency.

[0006] To solve the above-mentioned technical problems, the present invention provides a fall protection cover for a pre-reserved opening in a floor slab, comprising: a base placed on the surface of the floor slab; a driving mechanism for driving two support rods to move laterally inside the elevator shaft is installed on the surface of the base; a flexible protective net is installed between the two support rods; a fixing mechanism for fixing the protective rod is installed on the surface of the support rods; the fixing mechanism includes a second clamping plate; multiple second clamping plates are fixed to the surface of the support rods; a fixing shaft is rotatably connected above the second clamping plates; a fixing screw is fixedly connected to one end of the protective rod; the protective rod is inclined inside the elevator shaft; multiple fixing screws are threadedly connected to the protective rod; a first reinforcing plate is symmetrically installed on the side wall of the protective rod, and one end of the first reinforcing plate is fixed to the... On the side wall of the fixed shaft; an adjustment mechanism is installed at one end of the support rod to protect the inner elevator shaft offset from the doorway. The adjustment mechanism includes a first clamping plate fixed to the surface of the support rod. A first clamping plate for fixing a fixed plate is symmetrically installed on the side wall of the first clamping plate, and the fixed plate is fixed to one side of the fixed shaft. The side wall of the first clamping plate is symmetrically provided with a sliding groove through which the fixed frame passes. The fixed frame is rotatably connected to a limiting plate with an arc-shaped top end. The side wall of the fixed plate is provided with multiple slots with a "V" shaped cross section. The limiting plate is slidably connected inside the slots. A spring is installed between the limiting plate and the fixed frame. A limiting strip for limiting the limiting plate and the fixed plate is installed inside the fixed frame.

[0007] Preferably, a plurality of second rollers are installed on the bottom surface of the base, and second reinforcing plates are symmetrically installed on the side walls of the base. The second reinforcing plates abut against the wall panels. The wall panels are arranged around the elevator shaft and connected to the floor slab, and one side of the wall panels is provided with an entrance / exit opening.

[0008] Preferably, a support plate is symmetrically and rotatably connected to one side of the base, and the support plate with an "L"-shaped sidewall penetrates the doorway and abuts against and engages with the sidewall of the floor slab; one end of the support rod is rotatably connected to a first roller, and the first roller penetrates the doorway and obliquely abuts against and presses against the inner sidewall of the floor slab.

[0009] Preferably, the drive mechanism includes a mounting box, which is fixedly connected to the center of the surface of the base. A main gear and a secondary gear are rotatably connected inside the mounting box. The secondary gear is perpendicularly meshed on both sides of the main gear. An adjusting screw is fixedly connected to the side wall of the secondary gear. The adjusting screw is threadedly connected to a support. A mounting plate for supporting the adjusting screw is installed on the surface of the base. A support rod is rotatably connected to the surface of the support, and the support rod is inclined and symmetrically located on the surface of the base.

[0010] Preferably, the secondary gear is perpendicular to the primary gear, and the diameter of the secondary gear is larger than the diameter of the primary gear. The top surface of the primary gear is fixedly connected to a drive rod, and the drive rod is rotatably connected to the interior of the mounting box.

[0011] Preferably, the side wall of the support rod is provided with an installation groove, and a flexible protective net is installed inside the installation groove; a pressure plate is placed inside the installation groove, and the pressure plate abuts against and fixes the flexible protective net.

[0012] Preferably, the surface of the first reinforcing plate is provided with a groove, a screw passes through the groove and abuts against the groove, and the first reinforcing plate is fixed to the side wall of the protective rod and the fixed shaft by a nut and a threaded connection. Similarly, the flexible protective net and the pressure plate are fixed inside the mounting groove by the screw and the nut, and the first clamping plate and the second clamping plate are fixed to the surface of the support rod by the screw and the nut.

[0013] Preferably, the top surface of the second clamping plate is symmetrically and fixedly connected to the second clamping plate, and the interior of the second clamping plate is rotatably connected to the fixed shaft.

[0014] Preferably, a toothed plate is fixedly connected to one side of the bottom end of the second card plate, and the toothed plate engages with the side wall of the flexible protective net.

[0015] Compared with related technologies, the fall protection cover for pre-reserved openings in floor slabs provided by this invention has the following beneficial effects:

[0016] This invention provides a fall protection cover for pre-reserved openings in floor slabs. When protecting the interior of an elevator shaft, a flexible protective net and a protective rod are installed on the surface of the floor slab. The protective rod is placed on the surface of the flexible protective net, facilitating the passage of the support rod, the flexible protective net, and the protective rod through the entrance / exit opening into the elevator shaft. The support rod is placed at an angle inside the elevator shaft. One end of a pry bar is inserted into the slot, and rotating the pry bar utilizes leverage to rotate the fixed plate and the fixed shaft, causing the protective rod to unfold for easy worker operation. Because one end of the first reinforcing plate is secured to the side wall of the fixed shaft, the fixed shaft transmits force to the protective rod through the angled first reinforcing plate, facilitating the rotation of the protective rod and causing it to tilt and contact the wall panel. The flexible protective net between the support rods protects the elevator shaft at the location corresponding to the entrance / exit opening, while the protective rod protects the elevator shaft at locations offset from the entrance / exit opening. The elevator shaft is protected, allowing workers to perform protective work inside the shaft while standing on the floor slab, thus accelerating construction efficiency. Rotating the drive mechanism increases the spacing between the support rods. Because the adjusting screw is tilted above the base, the support rods gradually tilt deeper into the elevator shaft, increasing the pressure between the support rods and the wall panel, tightening the support plate, preventing the base from wobbling, and improving the stability of the device. Furthermore, the increased pressure between the protective rod, the support rod, and the wall panel causes the surface of the tilted protective rod to have a certain curvature. Simultaneously, the protective rod, the support, and the wall panel compress the support rod, causing the sidewall of the support rod to bend downwards and straighten towards the center of the elevator shaft. The surfaces of both the support rod and the protective rod slightly arch, generating an upward supporting force, improving the overall impact resistance of the support rod and the protective rod, and enhancing the protective effect. Attached Figure Description

[0017] Figure 1 A schematic diagram of a preferred embodiment of the anti-fall shielding device for reserved openings in floor slabs provided by the present invention;

[0018] Figure 2 A top view of the anti-fall shielding device for reserved openings in floor slabs provided by the present invention;

[0019] Figure 3 for Figure 2 The diagram shows an enlarged view of the structure at point A.

[0020] Figure 4 for Figure 3 The first reinforced plate structure shown is a side view.

[0021] Figure 5 for Figure 4 The diagram shows the fixed disk structure.

[0022] Figure 6 for Figure 5 The diagram shows a fixed frame structure.

[0023] Figure 7 for Figure 1 The side view of the internal structure of the support rod shown;

[0024] Figure 8 for Figure 3 The diagram shows the internal structure of the mounting box.

[0025] Figure 9 for Figure 1 The diagram shows the installation of the guardrail.

[0026] Numbered in the diagram: 1. Floor slab, 11. Elevator shaft, 12. Doorway, 13. Wall panel, 2. Support rod, 21. First roller, 22. Flexible protective net, 23. Mounting groove, 24. Pressure plate, 3. Protective rod, 31. First reinforcing plate, 32. Groove, 33. Screw, 34. Fixing screw, 35. Nut, 4. Base, 41. Second roller, 42. Support plate, 43. Mounting plate, 44. Second reinforcing plate, 5. Drive motor 51. Mounting box; 52. Adjusting screw; 53. Support; 54. Drive rod; 55. Secondary gear; 56. Main gear; 6. Adjusting mechanism; 61. Fixed plate; 62. First clamping plate; 63. First clamping plate; 64. Fixed frame; 65. Slot; 66. Slide groove; 67. Limiting plate; 68. Limiting strip; 69. Spring; 7. Fixing mechanism; 71. Fixed shaft; 72. Second clamping plate; 73. Toothed plate; 74. Second clamping plate. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Please see Figures 1 to 9 ,in Figure 1 A schematic diagram of a preferred embodiment of the anti-fall shielding device for reserved openings in floor slabs provided by the present invention; Figure 2 A top view of the anti-fall shielding device for reserved openings in floor slabs provided by the present invention; Figure 3 for Figure 2 The diagram shows an enlarged view of the structure at point A. Figure 4 for Figure 3 The first reinforced plate structure shown is a side view. Figure 5 for Figure 4 The diagram shows the fixed disk structure. Figure 6 for Figure 5 The diagram shows a fixed frame structure. Figure 7 for Figure 1 The side view of the internal structure of the support rod shown; Figure 8 for Figure 3 The diagram shows the internal structure of the mounting box. Figure 9 for Figure 1 The diagram shows the installation of the protective rod. A fall protection cover for a pre-reserved opening in a floor slab includes a base 4 placed on the surface of the floor slab 1. Multiple second rollers 41 are installed on the bottom surface of the base 4. Second reinforcing plates 44 are symmetrically installed on the side walls of the base 4, and the second reinforcing plates 44 abut against a wall panel 13. The wall panel 13 is located around the elevator shaft 11 and connects to the floor slab 1, with one side of the wall panel 13 having an entrance / exit opening 12. A support plate 42 is symmetrically rotatably connected to one side of the base 4, and the support plate 42, with its "L"-shaped sidewall, passes through the entrance / exit opening 12 and abuts against and engages with the floor slab. The side wall of the floor slab 1; one end of the support rod 2 is rotatably connected to the first roller 21, the first roller 21 passes through the entrance / exit 12 and tilts against and presses against the inner side wall of the floor slab 1; in order to facilitate the movement of the base 4 by the second roller 41, so that the base 4 moves to the entrance / exit 12, the base 4 and the second reinforcing plate 44 abut against the wall panel 13, the support plate 42 is rotated so that the support plate 42 hooks onto the floor slab 1, and the support rod 2 inside the elevator shaft 11 is supported by the support plate 42 and the base 4.

[0029] A flexible protective net 22 is installed between the two support rods 2; the side wall of the support rod 2 is provided with a mounting groove 23, and the flexible protective net 22 is installed inside the mounting groove 23; a pressure plate 24 is placed inside the mounting groove 23, and the pressure plate 24 abuts against and fixes the flexible protective net 22. In order to put the flexible protective net 22 into the mounting groove 23, the pressure plate 24 is used to squeeze the flexible protective net 22, and the flexible protective net 22 is stably fixed inside the mounting groove 23.

[0030] A fixing mechanism 7 for fixing the protective rod 3 is installed on the surface of the support rod 2. The fixing mechanism 7 includes a second clamping plate 72. Multiple second clamping plates 72 are fixed to the surface of the support rod 2. A fixing shaft 71 is rotatably connected above the second clamping plates 72. A second clamping plate 74 is symmetrically fixed to the top surface of the second clamping plates 72. The fixing shaft 71 is rotatably connected inside the second clamping plate 74. Multiple second clamping plates 72 are fixed to the surface of the support rod 2, thereby improving the support for the fixing shaft 71 and the protective rod 3 through the second clamping plates 74.

[0031] One end of the protective rod 3 is fixedly connected to a fixing screw 34, and the protective rod 3 is inclined inside the elevator shaft 11. Multiple fixing screws 34 are threadedly connected to the protective rod 3 to facilitate fixing the protective rod 3 to the surface of the fixing shaft 71 through the fixing screws 34, and to drive the protective rod 3 to rotate through the fixing shaft 71. The side wall of the protective rod 3 is symmetrically and inclinedly equipped with a first reinforcing plate 31, and one end of the first reinforcing plate 31 is fixed to the side wall of the fixing shaft 71. The first reinforcing plate 31 increases the stability between the protective rods 3, and the connection between the first reinforcing plate 31 and the fixing shaft 71 further increases the stability and firmness of the protective rod 3 and improves the impact resistance of the protective rod 3.

[0032] One end of the support rod 2 is equipped with an adjustment mechanism 6 for protecting the inner elevator shaft 11 offset from the doorway by the protective rod 3. The adjustment mechanism 6 includes a first clamping plate 62 fixed to the surface of the support rod 2. The side wall of the first clamping plate 62 is symmetrically equipped with a first clamping plate 63 for fixing a fixing plate 61, and the fixing plate 61 is fixed to one side of the fixing shaft 71. The side wall of the first clamping plate 63 is symmetrically provided with a sliding groove 66 through which the fixing frame 64 passes. The inside of the fixing frame 64 is rotatably connected to a limiting plate 67 with an arc-shaped top surface. The side wall of the fixing plate 61 is provided with multiple slots 65 with a "V" shaped cross section. The inside of the slots 65 is slidably connected to the limiting plate 64. A spring 69 is installed between the limiting plate 64 and the fixing frame 64. The inside of the fixing frame 64 is equipped with a limiting strip 68 for limiting the limiting plate 64 and the fixing plate 61. After fixing the first clamping plate 62 to the surface of the support rod 2, the fixing plate 61 is placed between the two first clamping plates 63. The fixing shaft 71 is moved so that it passes through the fixing plate 61. A screw is used to thread it into the side wall of the fixing plate 61. At the same time, one side of the fixing shaft 71 is provided with a screw groove corresponding to the screw. The screw enters the interior of the fixing shaft 71, so that the fixing shaft 71 is fixed together with the fixing plate 61. Then, the fixing frame 64 passes through the sliding groove 66 and is clamped into the side wall of the second clamping plate 63. When it is necessary to rotate the protective rod 3. Insert one end of the pry bar into the slot 63 and rotate the pry bar. Using the lever principle, the fixed plate 61, the fixed shaft 71, the first reinforcing plate 31, and the protective rod 3 rotate. When the fixed plate 61 rotates, it presses against the arc-shaped side of the top surface of the limiting plate 67. The fixed plate 61 pushes the limiting plate 67 to rotate downwards and presses the spring 69, so that the limiting plate 67 is separated from the fixed plate 61, which facilitates the rotation of the fixed plate 61. The spring 69 ensures that the limiting plate 67 and the fixed plate 61 remain in contact. When the fixed plate 61 wants to reverse, the fixed plate 61 pushes the limiting plate 67 to abut against the limiting strip 68, blocking the rotation of the limiting plate 67 and preventing the fixed plate 61 from reversing. This allows the protective rod 3 to rotate and abut against the wall panel 13, protecting the gap between the wall panel 13 and the support rod 2.

[0033] The base 4 has a drive mechanism 5 mounted on its surface to move the two support rods 2 laterally inside the elevator shaft 11. The drive mechanism 5 includes a mounting box 51, which is fixedly connected to the center of the base 4. A main gear 56 and a secondary gear 55 are rotatably connected inside the mounting box 51. The two sides of the main gear 56 are perpendicularly meshed with the secondary gear 55. An adjusting screw 52 is fixedly connected to the side wall of the secondary gear 55. The adjusting screw 52 is threadedly connected to a support 53. The base 4 has a mounting plate 43 mounted on its surface to provide support for the adjusting screw 52. The support rods 2 are rotatably connected to the surface of the support 53, and the support rods 2 are symmetrically located on the surface of the base 4. The secondary gear 55 and the main gear 56 are perpendicular to each other. The top surface of the main gear 56 is fixedly connected to the drive rod 54, and the drive rod 54 is rotatably connected to the interior of the mounting box 51. When it is necessary to adjust the distance between the support rods 2, the drive rod 54 is rotated with a wrench. The drive rod 54 drives the main and secondary gears to rotate. The diameter of the secondary gear 55 is larger than the diameter of the main gear 56, making it easier for the main gear 56 to drive the secondary gear 55 to rotate. The two secondary gears 55 rotate in opposite directions, causing the two adjusting screws 52 to rotate in opposite directions. Using the principle of screw transmission, the support 53 and the support rods 2 move along the adjusting screws 52, and the two support rods 2 move in opposite directions, causing the support rods 2 to move closer or further apart, changing the distance between the support rods 2.

[0034] The surface of the first reinforcing plate 31 is provided with a groove 32. A screw 33 passes through the groove 32 and abuts against it. A nut 35 is used to thread the screw 33 to fix the first reinforcing plate 31 to the side wall of the protective rod 3 and the fixed shaft 71. This is to facilitate the clamping of the first reinforcing plate 31 between the protective rod 3 and the fixed shaft 71, and to increase the stability of the connection between the fixed shaft 71 and the protective rod 3. Similarly, the screw 33 and the nut 35 are used to fix the flexible protective net 22 and the pressure plate 24 inside the mounting groove 23. The screw 33 and the nut 35 are used to fix the first clamping plate 62 and the second clamping plate 72 to the surface of the support rod 2.

[0035] The toothed plate 73 is fixedly connected to one side of the bottom end of the second clamping plate 72, and the toothed plate 73 engages with the side wall of the flexible protective net 22. In order to engage the flexible protective net 22 with the toothed plate 73, the stability of the flexible protective net 22 inside the support rod 2 is increased, and the flexible protective net 22 is prevented from detaching from the support rod 2.

[0036] The operating principle of this invention is as follows: When protecting the interior of the elevator shaft 11, rotate the drive rod 54 to bring the two supports 53 closer together, with the distance between the supports 53 being at least 15 cm less than the width of the entrance / exit opening 12. Then, install the support rod 2 onto the supports 53 using a pin. Place the flexible protective net 22 into the mounting groove 23 and press it down using the pressure plate 24. Use the fixing screw 34 to pass through the support rod 2, the pressure plate 24, and the flexible protective net 22, and use the nut 35 to fix the fixing screw 34, thus fixing the flexible protective net 22 inside the support rod 2. Similarly, the U-shaped clamping plate with a fixed side wall is fixed to the surface of the support rod 2 using the fixing screw 34 and nut 35. The fixing shaft 71 is passed through the second clamping plate 74, and the fixing plate 61 is placed between the two first clamping plates 63. The fixing shaft 71 is moved so that it passes through the fixing plate 61. The screw is threaded to the side wall of the fixing plate 61. At the same time, one side of the fixing shaft 71 is provided with a screw groove corresponding to the screw. The screw enters the interior of the fixing shaft 71, so that the fixing shaft 71 and the fixing plate 61 are fixed together, and the fixing plate 61 is fixed between the two first clamping plates 63. Rotate the fixed shaft 71 so that the screw hole on the surface of the fixed shaft 71 faces the flexible protective net 22, and rotate the fixed screw 34 into the screw hole on the surface of the fixed shaft 71. At this time, the protective rod 3 is located above the flexible protective net 22. Use two first reinforcing plates 31 to clamp the protective rod 3 and the fixed shaft 71 at an angle, and use the fixed screw 34 and nut 35 to hold the fixed shaft 71 and the protective rod 3 in place. At the same time, make the first reinforcing plates 31 clamp the protective rod 3 and the fixed shaft 71. After the two sets of protective rods 3 are assembled, the two sets of protective rods 3 are placed on the surface of the flexible protective net 22. Pull the support rod 2 upwards using a rope, slide the base 4, and drive the support rod 2 and the guard rod 3 through the entrance / exit opening 12 into the elevator shaft 11. When the base 4 touches the outer side of the wall panel 13, rotate the support plate 42 to hook the floor slab 1, release the rope, and let the first roller 21 touch the inner wall of the wall 13. The support rod 2 is now tilted inside the elevator shaft 11 (as shown in the attached diagram). Figure 1 (As shown). The interior of the same elevator shaft 11 (as attached). Figure 2 The elevator shaft shown in the image requires the left guardrail 3 of elevator shaft 11 to be rotated counterclockwise, and the right guardrail 3 of elevator shaft 11 requires it to be rotated clockwise (as shown in the attached image). Figure 5 As shown in the figure), adjust the orientation of the limiting plate 67 inserted into the slide groove 66 according to the rotation direction of the protective rod 3 (the orientation of the limiting plate is shown in the figure). Figure 5As indicated by the arrow in the diagram, insert the fixing frame 64 into the interior of the first clamping plate 63. Place one end of the pry bar into the interior of the slot 63 and rotate the pry bar. Using the lever principle, the fixing plate 61, the fixing shaft 71, the first reinforcing plate 31, and the protective rod 3 will rotate. Since one end of the first reinforcing plate 31 is stuck in the side wall of the fixing shaft 71, the rotation of the fixing shaft 71 will drive the first reinforcing plate 31 to rotate. The force is transmitted to the protective rod 3 through the inclined first reinforcing plate 31, which facilitates the rotation of the protective rod 3. When the fixed plate 61 rotates, it presses against the arc-shaped side of the top surface of the limiting plate 67. The fixed plate 61 pushes the limiting plate 67 downward to rotate and press the spring 69, separating the limiting plate 67 from the fixed plate 61, facilitating the rotation of the fixed plate 61. The spring 69 ensures that the limiting plate 67 remains in contact with the fixed plate 61. When the fixed plate 61 wants to reverse, the fixed plate 61 pushes the limiting plate 67 to abut against the limiting strip 68, blocking the rotation of the limiting plate 67 and preventing the fixed plate 61 from reversing. The rotation speed of the protective rod 3 is controlled by a pry bar to prevent the protective rod 3 from suddenly and forcefully colliding with the inner wall of the wall panel 13. When the protective rod 3 rotates and tilts to abut against the inner wall of the wall panel 13 (as shown in the attached diagram)... Figure 9 As shown), rotating the drive rod 54 pushes the support rods 2 away from each other. The support rods 2 push the first roller 21 to roll on the inner wall of the wall panel 13, reducing the resistance of the support rods 2 on the surface of the wall panel 13. The support rods 2 also cause the flexible protective net 22 to unfold and the protective rod 3 to move outward, causing the protective rod 3 to press against the wall panel 13, increasing the stability between the protective rod 3 and the wall panel 3. Since the adjusting screw 52 is inclined above the base 4, when the support rod 2 moves along the adjusting screw 52, ​​the support rod 2 gradually tilts into the elevator shaft 11, and the pressure between the support rod 2 and the wall panel 13 gradually increases. The support rod 2 presses against the base 4 outward, tightening the support plate 42 and preventing the base 4 from shaking. Simultaneously, the support rod 2 drives the protective rod 3 to tilt towards the wall panel 13 (as shown in the attached diagram). Figure 2(As shown by the middle arrow), the top of the protective rod 3 is spherical, facilitating its movement on the surface of the wall panel 13. As the protective rod 3 penetrates deeper into the elevator shaft 11, the pressure between the protective rod 3, the support rod 2, and the wall panel 13 increases. Simultaneously, the inclined surface of the protective rod 3 has a certain curvature, increasing its impact resistance. Furthermore, the protective rod 3, the support 53, and the wall panel 13 compress the support rod 2, causing the sidewall of the support rod 2 to bend downwards and straighten towards the center of the elevator shaft 11, preventing displacement of the support rod 2 and the protective rod 3 during construction. Both the support rod 2 and the protective rod 3 have slightly arched surfaces. When subjected to external forces, the arched structure can evenly distribute the force in all directions, effectively resisting external pressure. The support rod 2 and the protective rod 3 also generate an upward supporting force (as shown in the attached diagram). Figure 9 (As indicated by the arrow), this improves the impact resistance of the support rod 2 and the protective rod 3, enhancing the protective effect. When dismantling is required, reverse the above steps to remove the support rod 2 and the protective rod 3 from the elevator shaft 11, and then remove the protective rod 3 and the flexible protective net 22.

[0037] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A fall protection cover for a pre-reserved opening in a floor slab, characterized in that, include: A base (4) is placed on the surface of the floor slab (1), and a drive mechanism (5) is installed on the surface of the base (4) to drive the two support rods (2) to move laterally inside the elevator shaft (11). A flexible protective net (22) with elasticity is installed between the two support rods (2). A fixing mechanism (7) for fixing the guard rod (3) is installed on the surface of the support rod (2). The fixing mechanism (7) includes a second card plate (72). Multiple second card plates (72) are fixed on the surface of the support rod (2). A fixing shaft (71) is rotatably connected above the second card plate (72). One end of the protective rod (3) is fixedly connected to a fixing screw (34), and the protective rod (3) is inclined inside the elevator shaft (11); multiple fixing screws (34) are threadedly connected to the protective rod (3), and the side wall of the protective rod (3) is symmetrically and inclinedly installed with a first reinforcing plate (31), and one end of the first reinforcing plate (31) is fixed on the side wall of the fixing shaft (71); One end of the support rod (2) is equipped with an adjustment mechanism (6) for protecting the inner elevator shaft (11) offset from the doorway by the protective rod (3). The adjustment mechanism (6) includes a first clamping plate (62) fixed to the surface of the support rod (2). The side wall of the first clamping plate (62) is symmetrically equipped with a first clamping plate (63) for fixing a fixing plate (61), and the fixing plate (61) is fixed to one side of the fixing shaft (71). The side wall of the first clamping plate (63) is symmetrically provided with a fixing frame (64) that passes through the support rod (2). The first clamping plate (63) has a sliding groove (66), and the fixed frame (64) is internally rotatably connected to a limiting plate (67) with an arc-shaped top side; the side wall of the fixed plate (61) is provided with multiple slots (65) with a "V" shaped cross section, and the limiting plate (64) is slidably connected inside the slots (65). A spring (69) is installed between the limiting plate (64) and the fixed frame (64), and a limiting strip (68) for limiting the limiting plate (64) and the fixed plate (61) is installed inside the fixed frame (64).

2. The anti-fall covering device for pre-reserved openings in floor slabs according to claim 1, characterized in that, Multiple second rollers (41) are installed on the bottom surface of the base (4). Second reinforcing plates (44) are symmetrically installed on the side walls of the base (4). The second reinforcing plates (44) abut against the wall panel (13). The wall panel (13) is located around the elevator shaft (11) and connected to the floor slab (1). One side of the wall panel (13) is provided with an entrance / exit opening (12).

3. The anti-fall covering device for reserved openings in floor slabs according to claim 2, characterized in that, The base (4) is symmetrically and rotatably connected to a support plate (42) on one side, and the support plate (42) with an "L"-shaped sidewall penetrates the entrance / exit opening (12) and abuts against and engages with the sidewall of the floor slab (1); one end of the support rod (2) is rotatably connected to a first roller (21), and the first roller (21) penetrates the entrance / exit opening (12) and tilts against and presses against the inner sidewall of the floor slab (1).

4. The anti-fall covering device for reserved openings in floor slabs according to claim 3, characterized in that, The drive mechanism (5) includes a mounting box (51), which is fixedly connected to the center of the surface of the base (4). The main gear (56) and the auxiliary gear (55) are rotatably connected inside the mounting box (51). The auxiliary gear (55) is vertically meshed on both sides of the main gear (56). An adjusting screw (52) is fixedly connected to the side wall of the auxiliary gear (55). The adjusting screw (52) is threadedly connected to the support (53). A mounting plate (43) for providing support for the adjusting screw (52) is installed on the surface of the base (4). The support rod (2) is rotatably connected to the surface of the support (53), and the support rod (2) is symmetrically located on the surface of the base (4).

5. The anti-fall covering device for reserved openings in floor slabs according to claim 4, characterized in that, The secondary gear (55) is perpendicular to the main gear (56), and the diameter of the secondary gear (55) is larger than the diameter of the main gear (56). The top surface of the main gear (56) is fixedly connected to the drive rod (54), and the drive rod (54) is rotatably connected to the interior of the mounting box (51).

6. The anti-fall covering device for reserved openings in floor slabs according to claim 1, characterized in that, The side wall of the support rod (2) is provided with an installation groove (23), and a flexible protective net (22) is installed inside the installation groove (23); a pressure plate (24) is placed inside the installation groove (23), and the pressure plate (24) abuts against and fixes the flexible protective net (22).

7. The anti-fall covering device for reserved openings in floor slabs according to claim 6, characterized in that, The surface of the first reinforcing plate (31) is provided with a groove (32), and a screw (33) passes through the groove (32) and abuts against the groove (32). The first reinforcing plate (31) is fixed to the side wall of the protective rod (3) and the fixed shaft (71) by a threaded connection between the nut (35) and the screw (33). Similarly, the flexible protective net (22) and the pressure plate (24) are fixed inside the mounting groove (23) by the screw (33) and the nut (35), and the first clamping plate (62) and the second clamping plate (72) are fixed to the surface of the support rod (2) by the screw (33) and the nut (35).

8. The anti-fall covering device for reserved openings in floor slabs according to claim 7, characterized in that, The top surface of the second clamping plate (72) is symmetrically and fixedly connected to the second clamping plate (74), and the interior of the second clamping plate (74) is rotatably connected to the fixed shaft (71).

9. The anti-fall covering device for reserved openings in floor slabs according to claim 8, characterized in that, The toothed plate (73) is fixedly connected to one side of the bottom end of the second card plate (72), and the toothed plate (73) engages with the side wall of the flexible protective net (22).

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