A construction safety fence

Abstract

The application belongs to the technical field of fences, and specifically provides a construction safety fence, which comprises a fence body and a terrain adaptation assembly, the terrain adaptation assembly is arranged at the bottom of the fence body, the terrain adaptation assembly comprises a shell, sliding units, first elastic members and a driving unit, a plurality of avoiding holes are arranged at the bottom of the shell in intervals, the sliding units are arranged in the avoiding holes in a liftable manner, the driving unit is provided with a plurality of lifting ends capable of moving simultaneously, and the upper portion of each sliding unit is connected with the lifting end through the first elastic member. When the construction site is fenced, the fence body is fixed on the ground, when the ground is uneven, the lifting end of the driving unit is controlled to descend, the sliding unit extends out of the avoiding hole at the bottom until abutting against the ground. Under the action of the first elastic member, the sliding units at different positions can abut against the ground and seal the gaps, so that the risk of objects falling out of the fence gaps is eliminated, and the safety of the fence is improved.

Description

Technical Field

[0001] This application belongs to the field of fence technology, specifically a construction safety fence. Background Technology

[0002] Construction sites present numerous hazards, such as unsealed foundation pits, exposed electrical wires, and uneven ground. To ensure construction safety, it is typically necessary to fence off the construction site, creating a physical barrier to prevent pedestrians, vehicles, and other non-construction personnel from entering the site.

[0003] Because construction sites are unfinished areas with uneven surfaces, fences may need to be fixed to uneven ground during installation. When the ground is uneven, with pits, slopes, or other irregularities, the bottom of traditional fences is a fixed flat surface and cannot adhere to the ground, making it easy for construction tools such as wrenches, steel pipes, or construction debris to slip through the gaps. When the construction site is at a height, this could cause objects to fall from above, leading to safety accidents. Summary of the Invention

[0004] Based on the above-mentioned technical problems, this application provides a construction safety fence to solve the technical problem that the bottom of the fence cannot be attached to uneven ground in the prior art.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a construction safety fence, including a fence body and a terrain adaptation component disposed at the bottom of the fence body; the terrain adaptation component includes: The outer shell is located at the bottom of the fence body and extends along the length of the fence body. The outer shell has a receiving cavity inside. The bottom of the outer shell is provided with a plurality of clearance holes spaced apart along its own length, and the clearance holes communicate with the receiving cavity. Multiple sliding units are respectively disposed in the receiving cavity and correspond one-to-one with the clearance holes, and the sliding units slide in conjunction with the clearance holes; Multiple first elastic elements are respectively disposed within the receiving cavity and correspond one-to-one with the sliding unit; the bottom of each first elastic element is connected to the sliding unit; and A drive unit is disposed in the housing. The drive unit has a lifting end that can move up and down. Multiple lifting ends are provided and are respectively housed in the receiving cavity. The lifting ends are connected to the top of the first elastic member one by one.

[0006] In one possible implementation, a plurality of guide rods are spaced apart inside the receiving cavity along the length of the outer shell, the guide rods are vertically arranged, and the sliding unit has a guide block that slides with the guide rods.

[0007] In one possible implementation, the top of the sliding unit has a mounting cavity, and the driving unit includes: Multiple lifting plates are provided, each corresponding to a sliding unit. The lifting plates are slidably disposed within the corresponding mounting cavities. Each lifting plate forms a lifting end. The first elastic element is connected to the bottom of the lifting plate and the bottom wall of the mounting cavity. Multiple first links correspond one-to-one with the lifting plate, and the bottom of the first link is hinged to the top of the corresponding lifting plate; A drive shaft is arranged along the length of the housing and rotates with the housing; the drive shaft is positioned higher than the sliding unit and lower than the top of the first connecting rod. Multiple second links, each corresponding to a first link, have one end fixedly connected to the drive shaft and the other end hinged to the corresponding first link; and A drive wheel is disposed on the housing and located outside the receiving cavity, and the drive wheel is connected to the drive shaft in a driving connection.

[0008] In one possible implementation, the housing has a first limiting hole on the side adjacent to the drive wheel, and multiple first limiting holes are provided at equal intervals along the circumferential direction of the drive shaft. The drive wheel has a through second limiting hole. During the rotation of the drive wheel, the second limiting hole is axially aligned with multiple first limiting holes in sequence. Limiting pins are detachably inserted into the second limiting hole and the first limiting hole.

[0009] In one possible implementation, a clearance groove is provided on one side of the top of the sliding unit. The width of the clearance groove is greater than the width of the first link. During the movement of the first link, the lower part of the first link is accommodated in the clearance groove.

[0010] In one possible implementation, the sidewall of the mounting cavity is provided with a sliding groove, and the lifting plate has a slider that slides in cooperation with the sliding groove.

[0011] In one possible implementation, the fence body includes: Two support units are spaced apart along the length of the fence body, and the bottom of each support unit is used to fix it to the ground; and A perimeter fence is connected between the two support units, and the outer shell is located at the bottom of the perimeter fence.

[0012] In one possible implementation, the support unit includes: A column, erected vertically, has a support plate at its base that extends horizontally; and A diagonal brace connects the middle of the column and the support plate.

[0013] In one possible implementation, the fence slides with the support unit in the vertical direction, and multiple third limiting holes are spaced apart on both sides of the fence in the height direction. The support unit is provided with a fourth limiting hole. During the vertical movement of the fence, the fourth limiting hole is axially aligned with the multiple third limiting holes in sequence. The fence body also includes two positioning units, which are respectively located on the two support units and inserted into the corresponding third limiting hole and the fourth limiting hole.

[0014] In one possible implementation, the positioning unit includes: An insert rod, passing through the fourth limiting hole of the support unit, has a pull ring at the end of the insert rod away from the fence; and The second elastic element is disposed between the insertion rod and the support unit, and is configured with an elastic preload that causes the insertion rod to move toward the third limiting hole.

[0015] Compared with existing technologies, the beneficial effects of the construction safety fence provided in this application are: This application provides a construction safety fence including a fence body and a terrain adaptation component. The terrain adaptation component is located at the bottom of the fence body and includes a shell, sliding units, a first elastic element and a drive unit. The bottom of the shell is provided with multiple clearance holes at intervals. Multiple sliding units are movably arranged in the clearance holes. The drive unit has multiple lifting ends that can move simultaneously. The top of each sliding unit is connected to the lifting end through the first elastic element.

[0016] When fencing off a construction site, the fence body is fixed to the ground, the terrain-adaptive component is raised to an appropriate height above the ground, and the lifting end of the control drive unit is lowered, causing the sliding unit to extend from the clearance hole at the bottom until it contacts the ground. In this application, each sliding unit is connected to a first elastic element above it. The first elastic element can elastically deform in the vertical direction. When the ground is uneven, the sliding units at different positions can maintain contact with the ground under the action of elastic force, sealing the gaps, thereby eliminating the risk of objects falling out of the fence gaps and improving the safety of the fence. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A structural schematic diagram of a construction safety fence provided in this application embodiment. Figure 1 ; Figure 2 A structural schematic diagram of a construction safety fence provided in this application embodiment. Figure 2 ; Figure 3 for Figure 2 Enlarged view of part A in the middle; Figure 4 This is a partial schematic diagram of the terrain adaptation component in the embodiments of this application. Figure 1 ; Figure 5 This is a partial schematic diagram of the terrain adaptation component in the embodiments of this application. Figure 2 ; Figure 6 This is a schematic diagram of the sliding unit, the first elastic element, the lifting plate, the first connecting rod, and the second connecting rod in the embodiments of this application. Figure 7 This is a partial diagram illustrating the coordination of the perimeter fence, support unit, and positioning unit in an embodiment of this application. Explanation of reference numerals in the attached figures: 1. Fence body; 2. Terrain-adaptive component; 10. Outer shell; 11. Receiving cavity; 12. Guide rod; 13. First limiting hole; 20. Sliding unit; 21. Guide block; 22. Mounting cavity; 221. Clearance groove; 222. Slide groove; 30. First elastic element; 40. Drive unit; 41. Lifting plate; 411. Slider; 42. First connecting rod; 43. Drive shaft; 44. Second connecting rod; 45. Drive wheel; 451. Second limiting hole; 452. Limiting pin; 453. Handle; 50. Support unit; 51. Post; 511. Support plate; 512. Fourth limiting hole; 52. Diagonal brace; 60. Fence net; 61. Third limiting hole; 70. Positioning unit; 71. Insert rod; 72. Pull ring; 73. Second elastic element. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0021] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0024] Please refer to the following: Figures 1 to 7 The following describes a construction safety fence provided in an embodiment of this application.

[0025] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This application provides a construction safety fence, including a fence body 1 and a terrain adaptation component 2 disposed at the bottom of the fence body 1. The fence body 1 is used to fix itself to the ground, and the terrain adaptation component 2 is disposed on the fence body 1 and is raised to an appropriate height above the ground (e.g., 5 cm or 10 cm). The travel range of the sliding unit 20 is 0-100 mm, which can be adjusted according to the unevenness of the ground.

[0026] like Figures 3 to 6As shown, the terrain adaptation component 2 includes a housing 10, multiple sliding units 20, multiple first elastic elements 30, and a drive unit 40. The housing 10 is located at the bottom of the fence body 1 and extends along the length of the fence body 1. A receiving cavity 11 is formed inside the housing 10. Multiple clearance holes are spaced apart at the bottom of the housing 10 along its own length, and the clearance holes communicate with the receiving cavity 11. Multiple sliding units 20 are respectively located in the receiving cavity 11 and correspond one-to-one with the clearance holes. The sliding units 20 slide in cooperation with the clearance holes. Multiple first elastic elements 30 are respectively located in the receiving cavity 11 and correspond one-to-one with the sliding units 20. The bottom of the first elastic elements 30 is connected to the sliding unit 20. The drive unit 40 is located in the housing 10 and has multiple lifting ends that can move up and down. Each lifting end is located in the receiving cavity 11 and is respectively housed in the receiving cavity 11. The lifting ends are connected one-to-one with the top of the first elastic elements 30.

[0027] Compared with the prior art, the beneficial effects of the construction safety fence provided in this application embodiment are: This application provides a construction safety fence including a fence body 1 and a terrain adaptation component 2. The terrain adaptation component 2 is disposed at the bottom of the fence body 1. The terrain adaptation component 2 includes a shell 10, sliding units 20, a first elastic element 30 and a drive unit 40. The bottom of the shell 10 is provided with a plurality of clearance holes spaced apart. The plurality of sliding units 20 are movably disposed in the clearance holes. The drive unit 40 has a plurality of lifting ends that can move simultaneously. The top of each sliding unit 20 is connected to the lifting end through the first elastic element 30.

[0028] When enclosing a construction site, the fence body 1 is fixed to the ground, the terrain adaptation component 2 is raised to an appropriate height above the ground, and the control drive unit 40 causes the lifting end to descend, thereby causing the sliding unit 20 to extend from the bottom clearance hole until it touches the ground.

[0029] In this embodiment, each sliding unit 20 is connected to a first elastic element 30 above it. The first elastic element 30 can undergo elastic deformation in the vertical direction. When the ground is uneven, the sliding units 20 at different positions can keep in contact with the ground under the action of elastic force, sealing the gaps, thereby eliminating the risk of objects falling out of the fence gaps and improving the safety of the fence.

[0030] The construction safety fence provided in this embodiment includes two main components: the fence body 1 and the terrain adaptation component 2. The fence body 1, as the main component of the fence structure, serves to isolate the construction site. The fence body 1 can be made of common fence manufacturing materials such as stainless steel sheet, wire mesh, and engineering plastics.

[0031] There are no specific restrictions on the structure and shape of the fence body 1; existing fence products on the market can be directly selected. The fence body 1 can be used individually or multiple fence bodies can be sequentially spliced ​​together, depending on the length of each individual fence body 1 and the length of the construction area to be enclosed. When multiple fence bodies 1 are connected together, adjacent fence bodies 1 can be detachably connected using methods such as cable ties or screws.

[0032] To improve the stability of the fence body 1, the fence body 1 can be fixed to the ground using ground bolts, expansion screws, etc., or a heavy metal plate or metal block can be installed at the bottom of the fence body 1 as a counterweight.

[0033] The terrain adaptation component 2 includes a housing 10, a sliding unit 20, a first elastic element 30, and a drive unit 40. The housing 10 is fixed to the bottom of the fence body 1, and the housing 10 can be connected to the fence body 1 by welding, bonding, screw connection, or other methods.

[0034] Preferably, the outer shell 10 is detachably connected to the fence body 1. When the ground of the construction site is flat, the terrain adaptation component 2 does not need to be installed.

[0035] The outer shell 10 has an overall elongated shape and extends along the length of the fence body 1. The bottom of the outer shell 10 has multiple clearance holes that communicate with its own receiving cavity 11, and the sliding unit 20 is slidably disposed in the clearance holes.

[0036] The sliding unit 20 is in the shape of a long rod or a long plate, and can be made of common materials such as stainless steel or engineering plastics. The top of the sliding unit 20 is connected to the lifting end of the drive unit 40 through the first elastic element 30.

[0037] When the ground is flat, the lifting end of the drive unit 40 is at its upper stop position, the first elastic element 30 is stretched, and the bottom of the sliding unit 20 is flush with or higher than the bottom of the outer shell 10. When there are pits or slopes on the ground, the lifting end of the drive unit 40 descends, causing the first elastic element 30 and the sliding unit 20 to descend. The sliding unit 20 extends from the clearance hole at the bottom of the outer shell 10 until it abuts against the bottom of the pit. At this time, the first elastic element 30 is compressed, and the sliding unit 20 can press down against the ground under the pre-tightening force of the first elastic element 30, sealing off the low-lying areas on the ground, preventing construction tools, construction waste and other objects from falling out of the construction area, and improving the safety performance of the fence.

[0038] There is no specific limit to the number of sliding units 20; for example, it can be ten, twenty, thirty, or other numbers. The first elastic element 30 can be a cylindrical helical spring made of spring steel, and one, two, or more first elastic elements 30 can be connected to the top of each sliding unit 20.

[0039] The drive unit 40 has multiple lifting ends, which can lift and lower synchronously. The drive unit 40 can be driven by a lifting motor, requiring a power supply connection. Alternatively, the drive unit 40 can be manually driven, requiring manual adjustment of the lifting end positions.

[0040] Please see Figure 4 , Figure 5 and Figure 6 In some possible embodiments, in order to ensure that the sliding unit 20 can slide smoothly along the clearance hole, a plurality of guide rods 12 are provided at intervals along the length direction of the outer shell 10 inside the receiving cavity 11. The guide rods 12 are vertically arranged, and the sliding unit 20 has a guide block 21 that slides with the guide rods 12.

[0041] The sliding fit structure formed by the guide rod 12 and the guide block 21 is located inside the receiving cavity 11, making it difficult for water or dust to enter. The guide rod 12 can be a round rod, a square rod, or a rod of other shapes, and the guide block 21 has a guide hole that matches the shape of the guide rod 12. To reduce frictional resistance, lubricating oil can be applied to the mating surfaces of the guide rod 12 and the guide block 21.

[0042] Please see Figures 3 to 6 In some possible embodiments, the top of the sliding unit 20 is provided with a mounting cavity 22, and the drive unit 40 includes a lifting plate 41, a first connecting rod 42, a drive shaft 43, a second connecting rod 44, and a drive wheel 45. Multiple lifting plates 41 correspond one-to-one with sliding units 20. The lifting plates 41 are slidably disposed in the corresponding mounting cavities 22, forming the aforementioned lifting end. The first elastic element 30 is connected to the bottom of the lifting plate 41 and the bottom wall of the mounting cavity 22. Multiple first connecting rods 42 correspond one-to-one with the lifting plates 41. The bottom of the first connecting rod 42 is hinged to the top of the corresponding lifting plate 41. The drive shaft 43 is disposed along the length direction of the outer shell 10 and rotates with the outer shell 10. The drive shaft 43 is positioned higher than the sliding unit 20 and lower than the top of the first connecting rod 42. Multiple second connecting rods 44 correspond one-to-one with the first connecting rod 42. One end of the second connecting rod 44 is fixedly connected to the drive shaft 43, and the other end is hinged to the corresponding first connecting rod 42. The drive wheel 45 is disposed on the outer shell 10 and located outside the receiving cavity 11. The drive wheel 45 is drively connected to the drive shaft 43.

[0043] In this embodiment, a drive wheel 45 drives the drive shaft 43 to rotate. When the drive shaft 43 rotates, it drives multiple lifting plates 41 to rise and fall simultaneously through the second connecting rod 44 and the first connecting rod 42. The overall structure is compact and easy to install inside the relatively narrow outer shell 10. The driving method is simple, and one drive wheel 45 can drive multiple lifting plates 41 to move up and down at the same time.

[0044] The drive wheel 45 and the drive shaft 43 can be coaxially connected or connected via gears or other transmission components. The function of the drive wheel 45 is to rotate the drive shaft 43 by an appropriate angle, thereby changing the height of the sliding unit 20. The rotation of the drive wheel 45 can be manual or automatically driven by a motor or other driving components. When a motor is used for drive, the motor needs to be connected to a power source.

[0045] Please see Figure 4 and Figure 5 In some possible embodiments, the drive wheel 45 is manually operated to rotate, and a handle 453 is connected to the drive wheel 45 for easy gripping.

[0046] To limit and fix the drive wheel 45, a first limiting hole 13 is provided on the side of the outer casing 10 adjacent to the drive wheel 45. Multiple first limiting holes 13 are provided at equal intervals along the circumference of the drive shaft 43. The drive wheel 45 has a through second limiting hole 451. During the rotation of the drive wheel 45, the second limiting hole 451 axially aligns sequentially with the multiple first limiting holes 13. A limiting pin 452 is detachably inserted into the second limiting hole 451 and the first limiting hole 13. After the rotation angle of the drive wheel 45 is adjusted, the limiting pin 452 is inserted into the second limiting hole 451 and the first limiting hole 13, connecting the outer casing 10 and the drive wheel 45 as a single unit.

[0047] Please see Figure 4 and Figure 5 Considering that the sliding unit 20 is a vertically arranged slender rod or plate-shaped component, and the first connecting rod 42 has a large range of motion, in order to prevent interference between the first connecting rod 42 and the sliding unit 20, a clearance groove 221 is provided on one side of the top of the sliding unit 20. The width of the clearance groove 221 is greater than the width of the first connecting rod 42. During the movement of the first connecting rod 42, the lower part of the first connecting rod 42 is accommodated in the clearance groove 221.

[0048] Please see Figure 6 To prevent the lifting plate 41 from getting stuck when it moves, a sliding groove 222 is provided on the side wall of the mounting cavity 22. The lifting plate 41 has a slider 411 that slides in conjunction with the sliding groove 222. The sliding groove 222 and the slider 411 are used to guide the lifting plate 41 and improve the stability of the lifting plate 41.

[0049] Please see Figures 1 to 3 ,as well as Figure 7 In some possible embodiments, the fence body 1 includes support units 50 and a fence net 60. Two support units 50 are spaced apart along the length of the fence body 1, and the bottom of the support unit 50 is used to fix it to the ground; the fence net 60 is made of stainless steel metal mesh, and the fence net 60 is connected between the two support units 50, with the outer shell 10 located at the bottom of the fence net 60.

[0050] Please see Figures 1 to 3 The support unit 50 includes columns 51, support plates 511, and diagonal braces 52. The columns 51 are erected vertically, and a fence 60 is installed between two columns 51. The support plates 511 are located at the bottom of the columns 51 and extend horizontally. The diagonal braces 52 connect the middle of the columns 51 and the support plates 511, improving the structural stability of the fence body 1 and preventing it from tipping over or swaying. Furthermore, mounting holes can be made in the support plates 511 for installing connectors such as ground nails and expansion bolts.

[0051] To facilitate connection with the posts 51, U-shaped brackets can be welded to both sides of the fence 60, and the U-shaped brackets and posts 51 can be connected together using fasteners and connectors. When the middle part of the U-shaped bracket has a large area, a mesh panel, grid panel, or other shaped components can be installed in the middle part of the U-shaped bracket.

[0052] To prevent the outer casing 10 from being too far off the ground, the fencing 60 can be designed to be height-adjustable, with the fencing 60 driving the outer casing 10 to move up and down. Specifically, the fencing 60 slides in conjunction with the support unit 50 along the vertical direction. Multiple third limiting holes 61 are spaced apart on both sides of the fencing 60 along the height direction, and the support unit 50 has a fourth limiting hole 512. During the vertical movement of the fencing 60, the fourth limiting hole 512 axially aligns with the multiple third limiting holes 61 in sequence. The fence body 1 also includes two positioning units 70, which are respectively located on the two support units 50 and inserted into the corresponding third limiting holes 61 and fourth limiting holes 512, thus connecting and fixing the fencing 60 and the support unit 50.

[0053] Please see Figure 7 The positioning unit 70 includes a rod 71 and a second elastic element 73. The rod 71 passes through the fourth limiting hole 512 of the support unit 50, and a pull ring 72 is provided at the end of the rod 71 away from the fence 60. The second elastic element 73 can be a cylindrical helical spring. The second elastic element 73 is sleeved on the rod 71 and located between the rod 71 and the support unit 50. The second elastic element 73 is configured with an elastic preload that moves the rod 71 toward the third limiting hole 61. In its natural state, the rod 71 is inserted into the third limiting hole 61 under the push of the elastic preload of the second elastic element 73.

[0054] When the height of the fencing 60 needs to be adjusted, pull the insert rod 71 outward using the pull ring 72 to disengage the insert rod 71 from the third limiting hole 61, thus adjusting the height of the fencing 60. After adjusting to the appropriate height, release the pull ring 72, allowing the insert rod 71 to be inserted into the corresponding third limiting hole 61, thereby connecting the fencing 60 and the support unit 50 into one unit.

[0055] like Figure 7 As shown, to facilitate the installation of the insertion rod 71, the column 51 can be made of a hollow rectangular tube. The insertion rod 71 passes through the rectangular tube, and the second elastic member 73 is housed inside the rectangular tube. The portion of the insertion rod 71 located inside the rectangular tube has a boss structure that abuts against the second elastic member 73. One end of the second elastic member 73 abuts against the boss, and the other end abuts against the inner wall of the rectangular tube.

[0056] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present invention specification has recorded each combined embodiment and can support different combined embodiments.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A construction safety fence, characterized in that, It includes a fence body (1) and a terrain adaptation component (2) disposed at the bottom of the fence body (1); the terrain adaptation component (2) includes: The outer shell (10) is located at the bottom of the fence body (1) and extends along the length direction of the fence body (1). The outer shell (10) has a receiving cavity (11) inside. The bottom of the outer shell (10) is provided with a plurality of clearance holes spaced apart along its own length direction. The clearance holes are connected to the receiving cavity (11). Multiple sliding units (20) are respectively disposed in the receiving cavity (11) and correspond one-to-one with the clearance holes. The sliding units (20) slide in cooperation with the clearance holes. A plurality of first elastic elements (30) are respectively disposed within the receiving cavity (11), and the bottom of the first elastic element (30) is connected to the sliding unit (20); and A drive unit (40) is provided in the outer shell (10). The drive unit (40) has a lifting end that can move up and down. Multiple lifting ends are provided and are respectively housed in the receiving cavity (11). The lifting ends are connected to the top of the first elastic member (30) one by one. The sliding unit (20) has a mounting cavity (22) at its top, and the driving unit (40) includes: Multiple lifting plates (41) correspond one-to-one with the sliding unit (20). The lifting plate (41) is slidably disposed in the corresponding mounting cavity (22). The lifting plate (41) forms the lifting end. The first elastic element (30) is connected to the bottom of the lifting plate (41) and the bottom wall of the mounting cavity (22). Multiple first links (42) correspond one-to-one with the lifting plate (41), and the bottom of the first link (42) is hinged to the top of the corresponding lifting plate (41); The drive shaft (43) is arranged along the length of the housing (10) and rotates with the housing (10); the drive shaft (43) is located above the sliding unit (20) and below the top of the first connecting rod (42); Multiple second links (44) correspond one-to-one with the first link (42). One end of each second link (44) is fixedly connected to the drive shaft (43), and the other end is hinged to the corresponding first link (42). A drive wheel (45) is provided on the outer casing (10) and located outside the receiving cavity (11). The drive wheel (45) is connected to the drive shaft (43) in a transmission manner. The fence body (1) includes: Two support units (50) are spaced apart along the length of the fence body (1), and the bottom of each support unit (50) is used to fix it to the ground; and A perimeter fence (60) is connected between two of the support units (50), and the outer shell (10) is located at the bottom of the perimeter fence (60); The support unit (50) includes: A column (51) is erected, and a support plate (511) is provided at the bottom of the column (51). The support plate (511) extends horizontally and has mounting holes for installing connectors. Diagonal brace (52) is connected to the middle part of the column (51) and the support plate (511). The enclosure (60) slides in conjunction with the support unit (50) in the vertical direction. Multiple third limiting holes (61) are spaced apart on both sides of the enclosure (60) in the height direction. The support unit (50) is provided with a fourth limiting hole (512). During the vertical movement of the enclosure (60), the fourth limiting hole (512) is axially aligned with the multiple third limiting holes (61) in sequence. The fence body (1) also includes two positioning units (70), which are respectively located on the two support units (50) and inserted into the corresponding third limiting hole (61) and fourth limiting hole (512). When the ground is flat, the lifting end of the drive unit (40) is at its own upper stop position, the first elastic element (30) is stretched, and the bottom of the sliding unit (20) is flush with or higher than the bottom of the outer shell (10). When there are pits or slopes on the ground, the lifting end of the drive unit (40) descends, driving the first elastic element (30) and the sliding unit (20) to descend. The sliding unit (20) extends out from the clearance hole at the bottom of the outer shell (10) until it abuts against the bottom of the pit. At this time, the first elastic element (30) is compressed, and the sliding unit (20) can press down against the ground under the pre-tightening force of the first elastic element (30) to seal the low-lying position on the ground.

2. A construction safety fence according to claim 1, characterized in that, The cavity (11) is provided with a plurality of guide rods (12) spaced apart along the length of the outer shell (10). The guide rods (12) are vertically arranged. The sliding unit (20) has a guide block (21) that slides with the guide rods (12).

3. A construction safety fence according to claim 1, characterized in that, The outer casing (10) has a first limiting hole (13) on one side adjacent to the drive wheel (45). Multiple first limiting holes (13) are provided at equal intervals along the circumferential direction of the drive shaft (43). The drive wheel (45) has a through second limiting hole (451). During the rotation of the drive wheel (45), the second limiting hole (451) is axially aligned with multiple first limiting holes (13) in sequence. Limiting pins (452) are detachably inserted into the second limiting hole (451) and the first limiting hole (13).

4. A construction safety fence according to claim 1, characterized in that, The sliding unit (20) has a clearance groove (221) on one side of its top. The width of the clearance groove (221) is greater than the width of the first link (42). During the movement of the first link (42), the lower part of the first link (42) is accommodated in the clearance groove (221).

5. A construction safety fence according to claim 1, characterized in that, The side wall of the mounting cavity (22) is provided with a sliding groove (222), and the lifting plate (41) has a slider (411) that slides in cooperation with the sliding groove (222).

6. A construction safety fence according to claim 1, characterized in that, The positioning unit (70) includes: A rod (71) is inserted through the fourth limiting hole (512) of the support unit (50), and a pull ring (72) is provided at the end of the rod (71) away from the fence (60); and The second elastic element (73) is disposed between the insert rod (71) and the support unit (50) and is configured with an elastic preload that causes the insert rod (71) to move toward the third limiting hole (61).

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