Falling object protection device for constructional engineering safety and using method

Abstract

The invention belongs to the technical field of constructional engineering, and particularly relates to a falling object protection device for constructional engineering safety and a using method.The falling object protection device comprises a mounting main plate and a mounting connecting frame fixedly connected to the surface of the mounting main plate, and a protection baffle assembly is arranged above the mounting main plate; the protective baffle assembly comprises two protective plates arranged above the mounting main plate, mounting connecting plates are fixedly connected to the two sides of the protective plates, and vertical plates are arranged on the sides, away from the protective plates, of the mounting connecting plates; the protective plate I, the protective plate II and the inclined plate can be used for protection, a large-area falling area can be effectively blocked, and when a falling object collides with the protective plate, the buffer column slides on the surface of the supporting column, the friction ring generates friction force, the spring is compressed and the like act together, so that the impact force is greatly buffered, and the safety of the falling object is improved. Safety of the device and constructors and equipment below the device is effectively protected, and loss caused by impact of falling objects is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction engineering, and particularly relates to a falling object protection device and a using method for construction engineering safety. Background Technique

[0002] Construction refers to the production activities in the implementation stage of engineering construction, mainly involving the process of transforming various lines and elements on the design drawings into physical entities. This process includes multiple stages, such as foundation engineering construction, main structure construction, roofing engineering construction, decoration engineering construction, etc.;

[0003] The risk of falling objects during construction is a serious safety issue, which may cause serious personal injuries and property losses. Such risks mainly exist in the following aspects: working at heights: when working at heights, such as erecting scaffolding, installing equipment, etc., if appropriate safety measures are not taken, workers may slip or tools and materials may fall from a height; improper use of tools and equipment: during working at heights, if workers do not use or fix tools and equipment correctly, they may fall from a height and cause harm to the personnel below; the influence of wind and other human factors;

[0004] Therefore, a falling object protection device and a using method for construction engineering safety are designed to solve the above problems. Summary of the Invention

[0005] To solve the problems raised in the above background technique. The present invention provides a falling object protection device and a using method for construction engineering safety. Through the protection of the first protection board, the second protection board and the inclined board, it can effectively block a large area of the falling area. And when the falling object impacts the protection board, the buffer column slides on the surface of the support column, the friction ring generates friction force, the spring is compressed, etc. Multiple aspects work together to greatly buffer the impact force, effectively protect the safety of the device itself and the construction personnel and equipment below, and reduce the losses caused by the impact of falling objects.

[0006] To achieve the above object, the present invention provides the following technical solution: A falling object protection device for construction engineering safety, including a mounting main board and a mounting connection frame fixedly connected to the surface of the mounting main board, and a protection baffle assembly is arranged above the mounting main board;

[0007] The protection baffle assembly includes two protection boards arranged above the mounting main board. Installation connecting plates are fixedly connected to both sides of the protection board. A vertical plate is arranged on the side of the installation connecting plate away from the protection board. A first connecting arm and a second connecting arm are arranged between the installation connecting plate and the vertical plate. Both ends of the first connecting arm and the second connecting arm are rotatably connected to the installation connecting plate and the vertical plate through a rotating shaft respectively. An inclined board is fixedly connected to one side surface of the protection board.

[0008] Preferably, two groups of slide rails are symmetrically and fixedly connected to the surface of the mounting main board. Each slide rail surface is slidably connected with a slider. A support plate is mounted on the surface of the slider. A plurality of support columns are fixedly connected to the surface of the support plate. A buffer column is slidably connected to the surface of the support column. One end of the buffer column far away from the support column is fixedly connected to the protection plate.

[0009] Preferably, a buffer moving groove is formed at one end of the support column far away from the support plate. The lower end of the buffer column is slidably connected to the support column through the buffer moving groove. A friction ring is fixedly connected to one end of the buffer column arranged inside the buffer moving groove. The friction ring is in fit with the surface of the support column. An annular baffle is fixedly connected to the upper end of the support column. A spring is wound around the surface of the buffer column. Two ends of the spring are respectively fixedly connected to the annular baffle and the protection plate.

[0010] Preferably, it further includes a moving component arranged on the surface of the mounting main board. A bottom plate is fixedly connected to the surface of the mounting main board of the moving component. And the bottom plate is arranged between the two support plates and has the same distance from the two support plates. An output motor is mounted on the surface of the bottom plate. The end of the output shaft of the output motor is connected with a transmission shaft. A rotating plate is fixedly connected to the surface of the transmission shaft. Connecting columns I are fixedly connected to both ends of the surface of the rotating plate. And connecting columns II corresponding to the connecting columns I are fixedly connected to the surfaces of the two support plates.

[0011] Preferably, a pull rod is arranged between two corresponding connecting columns I and connecting columns II. Pull rings are arranged at both ends of the pull rod. The pull rod is connected with the connecting columns I and connecting columns II through the pull rings.

[0012] Preferably, a guiding air cylinder is fixedly connected to the surface of the mounting connecting frame. An anti-collision plate is fixedly connected to the tail end of the guiding air cylinder. An L-shaped plate is fixedly connected to the extending shaft of the guiding air cylinder. The L-shaped plate is connected to the support plate through bolts.

[0013] Preferably, it further includes an auxiliary protection component arranged above the mounting main board. The auxiliary protection component includes that a sector gear plate is rotatably connected to the surface of each connecting arm II. The sector gear plates are in pairs and corresponding. Two corresponding sector gear plates are meshed with each other. A connecting arm III is rotatably connected to one side of the sector gear plate far away from the connecting arm II. A connecting arm IV is rotatably connected to the surface of the connecting arm III. An installation frame is arranged at one end of the connecting arm IV far away from the connecting arm III. The connecting arm III is rotatably connected to the installation frame. A protection plate II is fixedly connected to the surface of the installation frame.

[0014] Preferably, a reinforcing column is fixedly connected between the two mounting brackets, and an extension plate is fixedly connected to the surface of the second protective plate.

[0015] Preferably, the length of the second protective plate matches the moving distance of the slider, and the second connecting arm, the sector gear plate and the third connecting arm rotate through the same rotating shaft.

[0016] The present invention also provides a method for using a falling object protection device for construction engineering safety, including the following steps:

[0017] S1. When in use, fix the main mounting board at a designated position of the construction project through the mounting connection frame to ensure firm and stable installation. According to the engineering needs, select whether to expand the protection range. If it is necessary to expand the protection range, start the output motor. The output shaft of the output motor rotates to drive the transmission shaft to rotate. The transmission shaft rotates to drive the fixedly connected rotating plate to rotate. The first connecting column on the rotating plate will pull the second connecting column through the pull rod, thereby pulling the support plate to move on the slide rail.

[0018] S2. When the support plate moves on the surface of the slide rail, since the support column is fixedly connected to the surface of the support plate, the support column and the buffer column arranged on its surface drive the protective plate to move. When the protective plate moves, both the first connecting arm and the second connecting arm rotate with the vertical plate and support the protective plate to move. During this process, due to the movement trajectories of the first connecting arm and the second connecting arm, the height of the protective plate changes during movement. At this time, since the protective plate is fixedly connected to the buffer column, the buffer column slides through the buffer moving groove with the support column. During the sliding process, the friction ring at the lower end of the buffer column fits with the surface of the support column, and a certain frictional force will be generated during the sliding process. The spring is in a compressed state before the output motor is started and has elastic potential energy. During the movement process, it supports the movement of the protective plate by generating elastic potential energy and finally returns to the compressed state.

[0019] S3. During the movement of the protective plate, observe the sector gear plates rotatably connected to the surfaces of each second connecting arm. Two corresponding sector gear plates mesh with each other. Through the meshing action, it will drive another sector gear plate to rotate synchronously. One side of the sector gear plate away from the second connecting arm is rotatably connected to the third connecting arm. The fourth connecting arm is rotatably connected to the surface of the third connecting arm. One end of the fourth connecting arm away from the third connecting arm is provided with a mounting bracket. The third connecting arm is rotatably connected to the mounting bracket. When the sector gear plate rotates, it will drive the mounting bracket to move through the third connecting arm and the fourth connecting arm, thereby adjusting the position of the second protective plate. Check the reinforcing column fixedly connected between the two mounting brackets to ensure that the reinforcing column is firm and reliable, which can enhance the stability of the second protective plate. At this time, the second protective plate makes up for the protection gap generated by the movement of the two first protective plates, thereby completing the effect of increasing the protection area.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The two protective plates in the protective baffle assembly, as the main protective structure, can form the first line of defense above specific areas of construction projects, blocking most falling objects. The connection structures of the installation connecting plates, connecting arm one, connecting arm two, and vertical plates on both sides of them not only provide stable support for the protective plates but also enable the protective plates to maintain good positions and angles in different working states, thus better coping with falling objects from various directions. The protective plate two in the auxiliary protection component cooperates with the protective baffle assembly to form a more rigorous protection network. When the protective plates move to expand the protection range, the protective plate two can timely fill the protection gaps generated by the movement of the two protective plates, ensuring that there are no protection loopholes under any circumstances, greatly improving the comprehensiveness of protection.

[0022] 2. The protective plates are connected to the support columns through buffer columns. During the movement of the protective plates, the springs can also support the movement of the protective plates by generating elastic potential energy, making the movement of the protective plates smoother. And after the movement ends, the springs can finally return to the compressed state to prepare for the next movement. When the buffer columns slide in the buffer movement grooves, the friction rings at the lower ends of the buffer columns fit with the surfaces of the support columns to generate frictional forces. This frictional force can further consume the impact energy when the protective plates are impacted by falling objects, reducing the impact on the protection device. At the same time, the existence of the friction rings can also limit the sliding speed of the buffer columns in the buffer movement grooves, avoiding excessive displacement of the protective plates when they are subjected to large impacts, improving the stability and reliability of the protection device.

[0023] 3. By starting the output motor, the support plate can be driven to move on the slide rails, thereby realizing the adjustment of the position of the first protective plate. This design enables the protection device to flexibly expand or shrink the protection range according to the actual needs of different construction projects. For example, in areas with a large construction area, the second protective plate can be moved to the outside so that the device can cover more potential dangerous areas, while in areas with a small construction area, the second protective plate can be retracted into the device to avoid occupying too much space. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0025] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is a schematic diagram of the structure of the installation connecting plate in the present invention;

[0027] Figure 3 is a schematic diagram of the structure of the buffer column in the present invention;

[0028] Figure 4 Schematic diagram of connecting column 1 in the present invention;

[0029] Figure 5 Schematic diagram of the transmission shaft in the present invention;

[0030] Figure 6 Schematic diagram of the sector gear plate in the present invention;

[0031] Figure 7 Schematic diagram of the protection plate in the present invention;

[0032] Figure 8 Schematic diagram of protection plate 2 in the present invention;

[0033] Figure 9 Schematic diagram of the support plate in the present invention;

[0034] In the figure:

[0035] 1. Installation main board; 11. Installation connecting frame;

[0036] 2. Protection baffle assembly; 21. Protection plate 1; 210. Support plate; 211. Slide block; 212. Slide rail; 213. Inclined plate; 22. Installation connecting plate; 23. Connecting arm 1; 24. Connecting arm 2; 25. Vertical plate; 26. Spring; 27. Buffer column; 271. Friction ring; 28. Annular baffle; 29. Support column; 291. Buffer moving groove;

[0037] 3. Auxiliary protection assembly; 31. Sector gear plate; 32. Connecting arm 3; 33. Connecting arm 4; 34. Installation frame; 35. Protection plate 2; 36. Reinforcing column; 37. Extension plate;

[0038] 4. Moving assembly; 41. Bottom plate; 42. Output motor; 43. Rotating plate; 44. Connecting column 1; 45. Pull rod; 46. Connecting column 2; 47. Guide cylinder; 48. Anti-collision plate; 49. L-shaped plate; 410. Transmission shaft; 411. Pull ring. Specific embodiments

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] Please refer to Figures 1 to 9, in the embodiments of the present invention, a falling object protection device for construction engineering safety includes a mounting main board 1 and a mounting connection frame 11 fixedly connected to the surface of the mounting main board 1. A protection baffle assembly 2 is arranged above the mounting main board 1;

[0041] The protection baffle assembly 2 includes two first protection plates 21 arranged above the mounting main board 1. Mounting connection plates 22 are fixedly connected to both sides of the first protection plate 21. A vertical plate 25 is arranged on the side of the mounting connection plate 22 away from the first protection plate 21. A first connecting arm 23 and a second connecting arm 24 are arranged between the mounting connection plate 22 and the vertical plate 25. Both ends of the first connecting arm 23 and the second connecting arm 24 are rotatably connected to the mounting connection plate 22 and the vertical plate 25 through rotating shafts respectively. An inclined plate 213 is fixedly connected to one side surface of the first protection plate 21.

[0042] Two groups of slide rails 212 are symmetrically and fixedly connected to the surface of the mounting main board 1. Sliders 211 are slidably connected to the surface of each group of slide rails 212. A support plate 210 is mounted on the surface of the slider 211. A plurality of support columns 29 are fixedly connected to the surface of the support plate 210. A buffer column 27 is slidably connected to the surface of the support column 29. One end of the buffer column 27 away from the support column 29 is fixedly connected to the first protection plate 21.

[0043] A buffer moving groove 291 is opened at one end of the support column 29 away from the support plate 210. The lower end of the buffer column 27 is slidably connected to the support column 29 through the buffer moving groove 291. A friction ring 271 is fixedly connected to one end of the buffer column 27 arranged inside the buffer moving groove 291. The friction ring 271 is in contact with the surface of the support column 29. An annular baffle 28 is fixedly connected to the upper end of the support column 29. A spring 26 is wound around the surface of the buffer column 27. Both ends of the spring 26 are fixedly connected to the annular baffle 28 and the first protection plate 21 respectively.

[0044] It further includes a moving component 4 arranged on the surface of the mounting main board 1. The moving component 4 includes a bottom plate 41 fixedly connected to the surface of the mounting main board 1. The bottom plate 41 is arranged between the two support plates 210 and has the same distance from the two support plates 210. An output motor 42 is mounted on the surface of the bottom plate 41. The end of the output shaft of the output motor 42 is connected to a transmission shaft 410. A rotating plate 43 is fixedly connected to the surface of the transmission shaft 410. First connecting columns 44 are fixedly connected to both ends of the surface of the rotating plate 43. Second connecting columns 46 corresponding to the first connecting columns 44 are fixedly connected to the surfaces of the two support plates 210.

[0045] A pull rod 45 is arranged between two corresponding first connecting columns 44 and second connecting columns 46. Pull rings 411 are arranged at both ends of the pull rod 45. The pull rod 45 is connected to the first connecting column 44 and the second connecting column 46 through the pull rings 411.

[0046] A guiding cylinder 47 is fixedly connected to the surface of the installation connecting frame 11. An anti-collision plate 48 is fixedly connected to the tail end of the guiding cylinder 47. An L-shaped plate 49 is fixedly connected to the extension shaft of the guiding cylinder 47. The L-shaped plate 49 is connected to the support plate 210 by bolts.

[0047] It further includes an auxiliary protection component 3 arranged above the installation main board 1. The auxiliary protection component 3 includes that a sector gear plate 31 is rotatably connected to the surface of each second connecting arm 24. The screw sector gear plates 31 are in pairs and corresponding. Two corresponding sector gear plates 31 are meshed with each other. One side of the sector gear plate 31 away from the second connecting arm 24 is rotatably connected to a third connecting arm 32. A fourth connecting arm 33 is rotatably connected to the surface of the third connecting arm 32. An installation frame 34 is arranged at one end of the fourth connecting arm 33 away from the third connecting arm 32. The third connecting arm 32 and the installation frame 34 are rotatably connected. A second protection plate 35 is fixedly connected to the surface of the installation frame 34.

[0048] A reinforcing column 36 is fixedly connected between the two installation frames 34, and an extension plate 37 is fixedly connected to the surface of the second protection plate 35.

[0049] The length of the second protection plate 35 matches the moving distance of the slider 211, and the second connecting arm 24, the sector gear plate 31 and the third connecting arm 32 rotate through the same rotating shaft.

[0050] The present invention also provides a use method of an environmental protection fiber toilet paper production device, including the following steps:

[0051] S1. When in use, fix the installation main board 1 at a specified position of a construction project through the installation connecting frame 11 to ensure firm and stable installation. According to the project needs, select whether to expand the protection range. If it is necessary to expand the protection range, start the output motor 42. The output shaft of the output motor 42 rotates to drive the transmission shaft 410 to rotate. The transmission shaft 410 rotates to drive the fixedly connected rotating plate 43 to rotate. The first connecting column 44 on the rotating plate 43 will pull the second connecting column 46 through the pull rod 45, thereby pulling the support plate 210 to move on the slide rail 212.

[0052] S2. When the support plate 210 moves on the surface of the slide rail 212, since the support column 29 is fixedly connected to the surface of the support plate 210, the support column 29 and the buffer column 27 provided on its surface drive the first protection plate 21 to move. When the first protection plate 21 moves, both the first connecting arm 23 and the second connecting arm 24 rotate with the vertical plate 25 and support the first protection plate 21 to move. During this process, due to the movement trajectories of the first connecting arm 23 and the second connecting arm 24, the height of the first protection plate 21 changes during movement. At this time, since the first protection plate 21 is fixedly connected to the buffer column 27, the buffer column 27 slides with the support column 29 through the buffer moving groove 291. During the sliding process, the friction ring 271 at the lower end of the buffer column 27 fits with the surface of the support column 29, and a certain amount of frictional force will be generated during the sliding process. The spring 26 is in a compressed state and has elastic potential energy before the output motor 42 is started. During the movement process, it supports the movement of the first protection plate 21 by generating elastic potential energy and finally returns to the compressed state;

[0053] S3. During the movement of the first protection plate 21, observe the sector-shaped toothed plates 31 rotatably connected to the surface of each second connecting arm 24. Two corresponding sector-shaped toothed plates 31 mesh with each other. Through the meshing effect, it will drive another sector-shaped toothed plate 31 to rotate synchronously. One side of the sector-shaped toothed plate 31 away from the second connecting arm 24 is rotatably connected to the third connecting arm 32. The surface of the third connecting arm 32 is rotatably connected to the fourth connecting arm 33. One end of the fourth connecting arm 33 away from the third connecting arm 32 is provided with a mounting bracket 34. The third connecting arm 32 and the mounting bracket 34 are rotatably connected. When the sector-shaped toothed plate 31 rotates, it will drive the mounting bracket 34 to move through the third connecting arm 32 and the fourth connecting arm 33, so as to adjust the position of the second protection plate 35. Check the reinforcing columns 36 fixedly connected between the two mounting brackets 34 to ensure that the reinforcing columns 36 are firm and reliable, which can enhance the stability of the second protection plate 35. At this time, the second protection plate 35 makes up for the protection gap generated by the movement of the two first protection plates 21, thereby completing the effect of increasing the protection area.

[0054] Working principle and usage process of the present invention: When in use, the installation main board 1 is fixed at a designated position of a construction project through the installation connecting frame 11 to ensure firm and stable installation. According to the project requirements, it is determined whether it is necessary to expand the protection range. If it is necessary to expand the protection range, start the output motor 42. The output shaft of the output motor 42 rotates to drive the transmission shaft 410 to rotate. The rotation of the transmission shaft 410 drives the fixedly connected rotating plate 43 to rotate. The connecting column one 44 on the rotating plate 43 will pull the connecting column two 46 through the pull rod 45, thereby pulling the support plate 210 to move on the slide rail 212. When the support plate 210 moves on the surface of the slide rail 212, since the support column 29 is fixedly connected to the surface of the support plate 210, the support column 29 and the buffer column 27 arranged on its surface drive the first protection plate 21 to move. At the same time, the guiding cylinder 47 and the L-shaped plate 49 provide guidance and stable support for the movement of the support plate 210. When the first protection plate 21 moves, both the first connecting arm 23 and the second connecting arm 24 rotate with the vertical plate 25 and support the first protection plate 21 to move. During this process, due to the movement trajectories of the first connecting arm 23 and the second connecting arm 24, the height of the first protection plate 21 changes during movement. When the first protection plate 21 moves, the buffer column 27 slides with the support column 29 through the buffer moving groove 291. During the sliding process, the friction ring 271 at the lower end of the buffer column 27 fits with the surface of the support column 29 to generate friction. The spring 26 is in a compressed state before the output motor 42 is started and has elastic potential energy. During the movement process, it supports the movement of the first protection plate 21 by generating elastic potential energy and finally returns to the compressed state. During the movement of the first protection plate 21, observe the sector gear plate 31 rotatably connected to the surface of each second connecting arm 24. Two corresponding sector gear plates 31 mesh with each other. Through the meshing effect, it will drive another sector gear plate 31 to rotate synchronously. When the sector gear plate 31 rotates, it will drive the mounting frame 34 to move through the third connecting arm 32 and the fourth connecting arm 33, thereby adjusting the position of the second protection plate 35. Check the strengthening column 36 fixedly connected between the two mounting frames 34 to ensure firmness and reliability and enhance the stability of the second protection plate 35. At this time, the second protection plate 35 makes up for the protection gap generated by the movement of the two first protection plates 21, thereby completing the effect of increasing the protection area.

[0055] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A falling object protection device for construction engineering safety, comprising an installation main board (1) and an installation connecting frame (11) fixedly connected to the surface of the installation main board (1), characterized in that: A protective baffle assembly (2) is provided above the mounting main board (1); The protective baffle assembly (2) includes two protective plates (21) provided above the mounting main board (1). Mounting connecting plates (22) are fixedly connected to both sides of the protective plate (21). A vertical plate (25) is provided on the side of the mounting connecting plate (22) away from the protective plate (21). A connecting arm one (23) and a connecting arm two (24) are provided between the mounting connecting plate (22) and the vertical plate (25). Both ends of the connecting arm one (23) and the connecting arm two (24) are rotatably connected to the mounting connecting plate (22) and the vertical plate (25) respectively through rotating shafts. An inclined plate (213) is fixedly connected to one side surface of the protective plate (21).

2. The falling object protection device for construction engineering safety according to claim 1, wherein: Two groups of slide rails (212) are symmetrically and fixedly connected to the surface of the mounting main board (1). Sliders (211) are slidably connected to the surface of each group of slide rails (212). A support plate (210) is mounted on the surface of the slider (211). A number of support columns (29) are fixedly connected to the surface of the support plate (210). A buffer column (27) is slidably connected to the surface of the support column (29). One end of the buffer column (27) away from the support column (29) is fixedly connected to the protective plate (21).

3. The falling object protection device for construction engineering safety according to claim 2, characterized in that: A buffer moving groove (291) is provided at one end of the support column (29) away from the support plate (210). The lower end of the buffer column (27) is slidably connected to the support column (29) through the buffer moving groove (291). A friction ring (271) is fixedly connected to the end of the buffer column (27) disposed inside the buffer moving groove (291). The friction ring (271) is in contact with the surface of the support column (29). An annular baffle (28) is fixedly connected to the upper end of the support column (29). A spring (26) is wound around the surface of the buffer column (27). Both ends of the spring (26) are fixedly connected to the annular baffle (28) and the protective plate (21) respectively.

4. The falling object protection device for construction engineering safety according to claim 3, characterized in that: It further includes a moving component (4) provided on the surface of the mounting main board (1). The moving component (4) includes a bottom plate (41) fixedly connected to the surface of the mounting main board (1). The bottom plate (41) is disposed between the two support plates (210) and has the same distance from the two support plates (210). An output motor (42) is mounted on the surface of the bottom plate (41). The end of the output shaft of the output motor (42) is connected to a transmission shaft (410). A rotating plate (43) is fixedly connected to the surface of the transmission shaft (410). Connecting columns one (44) are fixedly connected to both ends of the surface of the rotating plate (43). Connecting columns two (46) corresponding to the connecting columns one (44) are fixedly connected to the surface of the two support plates (210).

5. The falling object protection device for construction engineering safety according to claim 4, characterized in that: A pull rod (45) is arranged between two corresponding connecting columns I (44) and connecting columns II (46). Pull rings (411) are arranged at both ends of the pull rod (45). The pull rod (45) is connected to the connecting column I (44) and the connecting column II (46) through the pull rings (411).

6. The falling object protection device for construction engineering safety according to claim 5, wherein: A guiding cylinder (47) is fixedly connected to the surface of the installation connecting frame (11). An anti-collision plate (48) is fixedly connected to the tail end of the guiding cylinder (47). An L-shaped plate (49) is fixedly connected to the extending shaft of the guiding cylinder (47). The L-shaped plate (49) is connected to the supporting plate (210) through bolts.

7. The falling object protection device for construction engineering safety according to claim 6, characterized in that: It further includes an auxiliary protection assembly (3) arranged above the installation main board (1). The auxiliary protection assembly (3) includes that sector gear plates (31) are rotatably connected to the surfaces of each connecting arm II (24). The sector gear plates (31) are in pairs and corresponding. Two corresponding sector gear plates (31) mesh with each other. A connecting arm III (32) is rotatably connected to one side of the sector gear plate (31) away from the connecting arm II (24). A connecting arm IV (33) is rotatably connected to the surface of the connecting arm III (32). An installation frame (34) is arranged at one end of the connecting arm IV (33) away from the connecting arm III (32). The connecting arm III (32) and the installation frame (34) are rotatably connected. A protection plate II (35) is fixedly connected to the surface of the installation frame (34).

8. The falling object protection device for construction engineering safety according to claim 7, characterized in that: A strengthening column (36) is fixedly connected between the two installation frames (34), and an extension plate (37) is fixedly connected to the surface of the protection plate II (35).

9. The falling object protection device for construction engineering safety according to claim 8, characterized in that: The length of the protection plate II (35) matches the moving distance of the slider (211), and the connecting arm II (24), the sector gear plate (31) and the connecting arm III (32) rotate through the same rotating shaft.

10. The fall protection device and usage method for construction engineering safety according to any one of claims 1-9, characterized in that: It includes the following steps: S1. During use, the installation main board (1) is fixed at a specified position of a construction project through the installation connecting frame (11) to ensure firm and stable installation. According to the project needs, select whether to expand the protection range. If it is necessary to expand the protection range, the output motor (42) can be started. The output shaft of the output motor (42) rotates to drive the transmission shaft (410) to rotate. The transmission shaft (410) rotates to drive the fixedly connected rotating plate (43) to rotate. The connecting column I (44) on the rotating plate (43) will pull the connecting column II (46) through the pull rod (45), thereby pulling the supporting plate (210) to move on the slide rail (212). S2. When the support plate (210) moves on the surface of the slide rail (212), since the support column (29) is fixedly connected to the surface of the support plate (210), the support column (29) and the buffer column (27) provided on its surface drive the protection plate (21) to move. When the protection plate (21) moves, both the connecting arm one (23) and the connecting arm two (24) rotate with the vertical plate (25) and support the protection plate (21) to move. During this process, due to the movement trajectories of the connecting arm one (23) and the connecting arm two (24), the height of the protection plate (21) changes during movement. At this time, since the protection plate (21) is fixedly connected to the buffer column (27), the buffer column (27) slides with the support column (29) through the buffer moving groove (291). During the sliding process, the friction ring (271) at the lower end of the buffer column (27) fits on the surface of the support column (29), and a certain frictional force will be generated during the sliding process. The spring (26) is in a compressed state and has elastic potential energy before the output motor (42) is started. During the movement process, it supports the movement of the protection plate (21) by generating elastic potential energy and finally returns to the compressed state; S3. During the movement of the protection plate (21), observe the sector gear plate (31) rotatably connected to the surface of each connecting arm two (24). Two corresponding sector gear plates (31) mesh with each other. Through the meshing action, it will drive another sector gear plate (31) to rotate synchronously. One side of the sector gear plate (31) away from the connecting arm two (24) is rotatably connected to a connecting arm three (32). The surface of the connecting arm three (32) is rotatably connected to a connecting arm four (33). One end of the connecting arm four (33) away from the connecting arm three (32) is provided with a mounting bracket (34). The connecting arm three (32) and the mounting bracket (34) are rotatably connected. When the sector gear plate (31) rotates, it will drive the mounting bracket (34) to move through the connecting arm three (32) and the connecting arm four (33), so as to adjust the position of the second protection plate (35). Check the reinforcing column (36) fixedly connected between the two mounting brackets (34) to ensure that the reinforcing column (36) is firm and reliable, which can enhance the stability of the second protection plate (35). At this time, the second protection plate (35) makes up for the protection gap generated by the movement of the two first protection plates (21), thereby completing the effect of increasing the protection area.

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