A type of guardrail suitable for pre-drilled holes of various sizes

Abstract

This application relates to the technical field of building materials and provides a guardrail suitable for pre-drilled holes of various sizes. It includes several guardrail bodies surrounding the pre-drilled holes, with at least four guardrail bodies positioned at a single pre-drilled hole. Adjacent guardrail bodies are detachably connected by a connecting assembly. Each guardrail body includes two first posts and a telescopic plate mechanism disposed between the two first posts. The telescopic plate mechanism includes a first plate, a second plate slidably connected to the first plate, and a limiting assembly restricting the sliding of the second plate. The limiting assembly includes a limiting rod. The mutually distancing ends of the first and second plates are respectively disposed on the mutually close surfaces of the two first posts. The connecting assembly includes a connecting plate disposed on the first posts and a connector connecting two adjacent connecting plates. This application has the beneficial effect of adapting to pre-drilled holes of different sizes, thereby reducing the corresponding costs.

Description

Technical Field

[0001] This application relates to the technical field of building materials, and in particular to a guardrail suitable for pre-drilled holes of various sizes. Background Technology

[0002] Currently, during building construction, openings of a certain size are usually left during the pouring of concrete in the floor slab to install indoor ventilation ducts. Since the ventilation ducts are typically mounted on the ceiling, openings are usually reserved from the second floor to the top floor; these openings are commonly referred to as pre-reserved openings.

[0003] During construction, the reserved holes for ventilation ducts pose safety issues. Therefore, in existing technology, a large wooden board or wooden frame is usually placed above the opening to provide simple protection.

[0004] However, due to different building designs, the size of the ventilation ducts also varies, which requires the installation of wooden boards of the corresponding size, making it more troublesome and costly, thus requiring further improvement. Summary of the Invention

[0005] In order to accommodate reserved holes of different sizes and reduce the corresponding costs, this application provides a guardrail suitable for reserved holes of multiple sizes.

[0006] This application provides a guardrail suitable for pre-drilled holes of various sizes, employing the following technical solution:

[0007] A guardrail suitable for pre-drilled holes of various sizes includes several guardrail bodies surrounding the pre-drilled holes. At least four guardrail bodies are installed at each pre-drilled hole, and adjacent guardrail bodies are detachably connected by connecting components. Each guardrail body includes two first posts and a telescopic plate mechanism disposed between the two first posts. The telescopic plate mechanism includes a first plate, a second plate slidably connected to the first plate, and a limiting component restricting the sliding of the second plate. The limiting component includes a limiting rod, with the mutually distancing ends of the first and second plates respectively disposed on the mutually close surfaces of the two first posts. The connecting component includes a connecting plate disposed on the first posts and a connecting piece connecting two adjacent connecting plates. The two ends of the limiting rod are respectively disposed on the diagonally arranged connecting plates.

[0008] By adopting the above technical solution, when protection is required at the reserved opening, a corresponding number of guardrail bodies are set along the perimeter of the reserved opening. Taking four guardrail bodies as an example, the protection length of the guardrail bodies at each side is changed according to the length of the reserved opening. Specifically, the second plate is slidably connected to the first plate. When the area to be protected by the four guardrail bodies is reached, the connecting plates on the two adjacent first posts are abutted together and connected by connectors. It should be noted that this step can be done in advance and then adjusted according to the length and width of the reserved opening.

[0009] After connection, limit rods of appropriate length are installed on diagonally arranged connecting plates to define the protective space enclosed by the four guardrail bodies, thus protecting the pre-drilled holes. Using a single limit rod to define the protective space formed by the four guardrail bodies reduces the steps and time required for limiting each first plate that slides to the second plate, improving efficiency. Because the second plate slides to the first plate to accommodate pre-drilled holes of different sizes, and the guardrail has a certain height, it reduces installation hazards associated with wooden planks. Furthermore, the planks can be recycled after the ventilation pipes are installed, reducing resource waste.

[0010] Preferably, the limiting rod includes a first connecting rod, a second connecting rod slidably connected to the first connecting rod, and a first limiting member that restricts the sliding of the second connecting rod. The ends of the first connecting rod and the second connecting rod that are far apart from each other are respectively hinged to mounting plates, and the mounting plates are mounted to the connecting plate through connecting members.

[0011] By adopting the above technical solution, and by setting a first connecting rod, a second connecting rod slidably connected to the first connecting rod, and a first limiting member, with mounting plates hinged to the ends of the first and second connecting rods that are far apart from each other, and mounted on the connecting plates via connecting members, the limiting rods can be installed on the guardrail bodies when connecting the four guardrail bodies. When adjusting the area enclosed by the four guardrail bodies according to the size of the reserved hole, the length between the first and second connecting rods can be changed. When a certain position is reached, the first limiting member limits the first and second connecting rods, which reduces the cost of equipping limiting rods of different lengths and the time spent installing the limiting rods on the limiting plate.

[0012] Preferably, there are two limiting rods, which are staggered.

[0013] By adopting the above technical solution, and by setting two limiting rods, the two limiting rods are staggered to support the four guardrail bodies, thereby improving the protection effect of the reserved hole and reducing the possibility of deformation of the guardrail bodies due to external forces. Since the two limiting rods divide the cavity formed by the four guardrail bodies into several small spaces, the possibility of falling into the reserved hole by crossing the guardrail body is reduced, thus improving the protection effect.

[0014] Preferably, the guardrail body further includes two second posts that are slidably connected to the two first posts and a second limiting member that restricts the sliding of the second posts. A flexible protective net is provided between the second posts, and one of the second posts is provided with a winding member for winding up the protective net.

[0015] By adopting the above technical solution and setting a second column, the protection height of the reserved hole can be increased, the protection effect can be further improved, and the protection range and adaptability of the guardrail can be further improved.

[0016] Preferably, the second column has a first mounting groove for mounting a winding component. The winding component includes a rotating rod built into the first mounting groove and a coil spring fixedly connected to the rotating rod. The length direction of the rotating rod is parallel to the height direction of the second column, and the rotating rod is rotatably connected to the two opposite walls of the first mounting groove. The second limiting member includes a second limiting bolt. The first column has a through hole, and the second column has a plurality of first threaded holes connected to the through hole along its length direction. The second limiting bolt passes through the through hole and is threadedly connected to the first threaded holes.

[0017] By adopting the above technical solution, for the required protection height, the second column is first slid to the corresponding height, and when the first threaded hole and the through hole are aligned, the second limiting bolt is threaded through the through hole and the first threaded hole to fix the height of the second column. It should be noted that during the sliding connection of the second plate to the first plate, the protective netting is stretched, while the coil spring retracts the netting, allowing it to remain taut during the storage or use of the guardrail body.

[0018] Preferably, the rotating rod is fixedly connected to a limiting plate, the length direction of the limiting plate is parallel to the length direction of the rotating rod, the limiting plate has a plurality of second threaded holes along its own length direction, the second threaded holes are set relative to the first threaded holes, the second threaded holes are connected to the first threaded holes, and the second limiting bolt is threadedly connected to the second threaded holes.

[0019] By adopting the above technical solution, when the protective net is affected by external force, the external force may cause the rotating rod to unwind the protective net, which may pose a safety hazard. At this time, by setting a limit plate and opening several second threaded holes on the limit plate, the second limit bolts are threaded through the through hole, the first threaded hole and the second threaded hole to limit the rotating rod, thereby reducing the possibility of the rotating rod being affected by external force to unwind the protective net, and further improving the protective effect of the guardrail body.

[0020] Preferably, the second connecting rod has a second mounting groove for mounting the first limiting member. The first limiting member includes a push rod built into the second mounting groove, a first spring fixedly connected to the push rod, and a first limiting block abutting against the other end of the push rod. The first limiting block is located at the end of the push rod away from the first spring. The push rod has a first slot for the first limiting block to slide into. The push rod has a first guide groove communicating with the first slot. The first guide groove is located at the end of the first slot away from the first spring, and the depth of the first guide groove gradually decreases towards the end away from the first spring. The first spring forces the push rod to move towards the first connecting rod. The first connecting rod has a plurality of first limiting holes extending along its own length. The second connecting rod has a second limiting hole for the first limiting block to pass through. The second limiting hole communicates with the first limiting hole. A connecting rope is fixedly connected to the push rod. The connecting rope passes coaxially through the first spring and through the second connecting rod, and is fixedly connected to the bolt of the second limiting bolt.

[0021] By adopting the above technical solution, and by providing a connecting rope that is fixedly connected to the bolt of the second limiting bolt, the connecting rope can be wound up during the process of rotating the bolt threaded into the second threaded hole. This causes the push rod to rotate away from the first connecting rod, thereby causing the first limiting block to slide and connect to the first guide groove and rise. It then slides into the second limiting hole and the first limiting hole, which are positioned opposite each other, thus limiting the slippage of the second connecting rod. This restricts the lifting and lowering of the second column while simultaneously restricting the slippage of the second connecting rod, thereby limiting the area and height protected by the guardrail body. This reduces the steps and time required to first limit the limiting rod and then limit the height of the guardrail body, thus accelerating the fixation of the protected area of ​​the guardrail body.

[0022] Preferably, the first threaded hole in the second column, away from the winding member, extends to the opposite side walls of the second column. The second limiting bolt is threaded through the first threaded hole. The side wall of the first plate has a third sliding groove communicating with the first threaded hole. The limiting assembly further includes a sliding rod slidably connected to the third sliding groove, an abutment rod fixedly connected to one end of the sliding rod, a second spring coaxially sleeved on the abutment rod, and a second limiting block abutting the other end of the sliding rod. The first limiting block is located at the end of the sliding rod away from the second spring. The sliding rod has... A second slot is provided for the sliding insertion of the second limiting block. The slide rod has a second guide groove communicating with the second slot. The second guide groove is located at one end of the second slot near the second spring. The depth of the second guide groove gradually decreases towards the end near the second spring. The second spring forces the slide rod to move towards the direction near the first threaded hole. The second limiting bolt abuts against the slide rod. A third limiting hole communicating with the third slide groove is provided on the surface of the first plate near the second plate. A fourth limiting hole communicating with the third limiting hole is provided on the second plate.

[0023] By adopting the above technical solution, when the guardrail body is used alone, the second limiting bolt is inserted into the through hole and the first threaded hole. When the second limiting bolt abuts against the slide bar, the slide bar is pushed to move away from the second spring, so as to push the second limiting block to slide and connect to the second guide groove. As the second guide groove rises, it slides into the third limiting hole and the fourth limiting hole that are set opposite to each other, thereby limiting the sliding of the second plate.

[0024] Preferably, the first plate and the second plate are provided with hooks protruding from the surface of the protective net, and the hooks are hung on the protective net.

[0025] By adopting the above technical solution and by setting hooks, the gaps between the protective net and the first and second plates are protected.

[0026] In summary, this application has the following beneficial effects:

[0027] 1. By using a limiting rod to limit the protective space formed by the four guardrail bodies, the corresponding procedures and time required for limiting each sliding connection of the first plate to the second plate can be reduced, thus increasing efficiency and adapting to pre-drilled holes of different sizes.

[0028] 2. By installing a second post, the protection height of the reserved hole can be increased, further improving the protection effect, and the protection range and adaptability of the guardrail can be further improved. Attached Figure Description

[0029] Figure 1This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0030] Figure 2 This is a schematic diagram of the structure of the guardrail body in Embodiment 1 of this application;

[0031] Figure 3 yes Figure 2 A magnified view of the area located at point A;

[0032] Figure 4 This is a cross-sectional structural diagram of the limiting rod in Embodiment 1 of this application;

[0033] Figure 5 This is a schematic diagram of the structure of the winding component in Embodiment 1 of this application;

[0034] Figure 6 This is a schematic diagram of the structure of the first spring in Embodiment 2 of this application;

[0035] Figure 7 This is a cross-sectional structural diagram of the limiting rod in Embodiment 2 of this application;

[0036] Figure 8 This is a schematic diagram of the connecting rope structure in Embodiment 2 of this application;

[0037] Figure 9 This is a schematic diagram of the structure of the guardrail body in Embodiment 3 of this application;

[0038] Figure 10 This is a schematic diagram of the limiting component in Embodiment 3 of this application;

[0039] Figure 11 yes Figure 10 A magnified view of the area located at point B;

[0040] Figure 12 yes Figure 10 A magnified view of the area located at point C.

[0041] Explanation of reference numerals in the attached drawings: 1. Reserved hole; 2. Guardrail body; 21. Connecting component; 211. Connecting plate; 212. Connecting piece; 2121. Connecting bolt; 2122. Connecting nut; 3. First post; 31. Base; 32. Second slide groove; 33. Through hole; 4. Telescopic plate mechanism; 41. First plate; 411. First slide groove; 412. Third slide groove; 413. Third limiting hole; 42. Second plate; 421. Slide plate; 422. Fourth limiting hole; 43. Limiting component; 431. First connecting rod; 4311. First limiting hole; 432. Second connecting rod; 4321. Second mounting groove; 4322. Second limiting hole ; 433, First limiting component; 4331, Push rod; 4332, First spring; 4333, First limiting block; 434, Sliding rod; 4341, Second slot; 4342, Second guide groove; 435, Abutting rod; 436, Second spring; 437, Second limiting block; 44, Hook; 5, Second column; 51, Protective net; 52, First threaded hole; 53, Rewinding component; 531, Rotating rod; 532, Coil spring; 54, First mounting groove; 6, Second limiting component; 61, Connecting rope; 7, Mounting plate; 8, Rotating plate; 81, Limiting plate; 811, Second threaded hole; 9, First slot; 91, First guide groove; 10, Sliding block. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail below.

[0043] This application discloses a guardrail suitable for pre-reserved holes of various sizes.

[0044] Example 1:

[0045] A type of guardrail suitable for pre-drilled holes of various sizes, as shown in the reference. Figure 1 , Figure 2 It includes several guardrail bodies 2 that are installed around the reserved hole 1. There are at least four guardrail bodies 2 installed at a reserved hole 1. Adjacent guardrail bodies 2 are provided with connecting components 21 for detachable connection.

[0046] Specifically, the guardrail body 2 includes two first posts 3, a telescopic plate mechanism 4 disposed between the two first posts 3, a second post 5 slidably connected to the two first posts 3 respectively, and a second limiting member 6 restricting the sliding of the second post 5. In this embodiment, a base 31 is fixedly connected to the lower end of the first post 3, and the second post 5 is disposed at the upper end of the first post 3.

[0047] The telescopic plate mechanism 4 specifically includes a first plate 41, a second plate 42 slidably connected to the first plate 41, and a limiting component 43 that restricts the sliding of the second plate 42. The first plate 41 and the second plate 42 abut against each other. A first groove 411 is formed on the surface of the first plate 41 near the second plate 42. A slide plate 421 protrudes from the second plate 42 and is slidably connected to the first groove 411. The slide plate 421 is T-shaped. The two ends of the first plate 41 and the second plate 42 that are far apart from each other are respectively fixedly connected to the close surfaces of the two first columns 3.

[0048] Reference Figure 2 , Figure 3 The connecting component 21 includes a connecting plate 211 fixedly connected to the side wall of the first column 3 and a connector 212 connecting two adjacent connecting plates 211. The connecting plates 211 disposed on two adjacent guardrail bodies 2 abut against each other. In this embodiment, the connector 212 includes a connecting bolt 2121 and a connecting nut 2122 threadedly connected to the connecting bolt 2121. The connecting bolt 2121 is threaded through the two connecting plates 211 and threadedly connected to the connecting nut 2122 to fix the two guardrail bodies 2 together.

[0049] In this embodiment, the limiting component 43 is specifically a limiting rod. In this embodiment, the two ends of the limiting rod are respectively disposed on the diagonally arranged connecting plates 211, and there are two limiting rods arranged in a staggered manner, with each limiting rod corresponding to one of the two diagonally arranged connecting plates 211. The limiting rod specifically includes a first connecting rod 431, a second connecting rod 432 slidably connected to the first connecting rod 431, and a first limiting member 433 that restricts the sliding of the second connecting rod 432. The ends of the first connecting rod 431 and the second connecting rod 432 that are far apart from each other are respectively hinged to mounting plates 7. The mounting plates 7 are mounted on the connecting plates 211 via connecting members 212, and connecting bolts 2121 pass through the mounting plates 7.

[0050] Reference Figure 3 , Figure 4 In this embodiment, the first limiting member 433 is a first limiting bolt, and the first connecting rod 431 has a plurality of first limiting holes 4311 along its length direction. The first limiting bolt slides through the first limiting holes 4311 and is threadedly connected to the second connecting rod 432 to fix the length between the first connecting rod 431 and the second connecting rod 432.

[0051] Reference Figure 2 , Figure 5The upper end face of the first column 3 is provided with a second sliding groove 32 for the second column 5 to slide and connect. The upper end of the second column 5 is exposed outside the first column 3. In this embodiment, the second limiting member 6 is a second limiting bolt. The first column 3 is provided with a through hole 33. The second column 5 is provided with a plurality of first threaded holes 52 connected to the through hole 33 along its length direction. The second limiting bolt passes through the through hole 33 and is threadedly connected to the first threaded holes 52 to fix the height of the second column 5.

[0052] In this embodiment, a flexible protective net 51 is provided between the second columns 5, and the protective net 51 is elastic. One end of the protective net 51 is fixedly connected to one of the second columns 5, and the other second column 5 is provided with a winding member 53 for winding the protective net 51. Specifically, the second column 5 has a first mounting groove 54 for mounting the winding member 53. The winding member 53 includes a rotating rod 531 built into the first mounting groove 54 and a coil spring 532 fixedly connected to the rotating rod 531. The length direction of the rotating rod 531 is parallel to the height direction of the second column 5. The rotating rod 531 is rotatably connected to the two opposite walls of the first mounting groove 54. The protective net 51 is fixedly connected to the coil spring 532, and the coil spring 532 forces the protective net 51 to move towards the rotating rod 531.

[0053] Furthermore, to reduce the possibility of the protective net 51 being stretched due to external forces, in this embodiment, a rotating plate 8 is coaxially fixedly inserted through the lower end of the rotating rod 531. A limiting plate 81 is fixedly connected to the outer peripheral wall of the rotating plate 8. The length direction of the limiting plate 81 is parallel to the length direction of the rotating rod 531. The limiting plate 81 has a plurality of second threaded holes 811 along its own length direction. The second threaded holes 811 are set relative to the first threaded hole 52 and are connected to the first threaded hole 52. The second limiting bolt is threadedly connected to the second threaded hole 811, thereby limiting the rotating rod 531 so that the length of the protective net 51 unrolled is constant.

[0054] Reference Figure 2 Furthermore, since the protective net 51 is elastic, the middle part of the protective net 51 will retract. Therefore, in this embodiment, the first plate 41 and the second plate 42 are both fixed with hooks 44 protruding from the surface near the protective net 51. Several hooks 44 are arranged at intervals along the length direction of the first plate 41 and the second plate 42. The hooks 44 are hung on the protective net 51 to fix the protective net 51.

[0055] The implementation principle of a guardrail applicable to multiple sizes of reserved holes in this application embodiment is as follows: When it is necessary to protect the reserved hole 1, a corresponding number of guardrail bodies 2 are set along the perimeter of the reserved hole 1. This application specifically takes four guardrail bodies 2 as an example. According to the length of the reserved hole 1, the protection length of the guardrail bodies 2 at each side length is changed. Specifically, the second plate 42 is slidably connected to the first plate 41. When the area to be protected by the four guardrail bodies 2 is reached, the connecting plates 211 on the two adjacent first posts 3 are abutted together and connected by the connector 212. It should be noted that this step can be installed in advance and then adjusted according to the length and width of the reserved hole 1.

[0056] After connection, the area enclosed by the four guardrail bodies 2 can be adjusted according to the size of the reserved hole 1. This can cause the length between the first connecting rod 431 and the second connecting rod 432 to change. When it reaches a certain position, the first limiting member 433 can limit the first connecting rod 431 and the second connecting rod 432. This can reduce the cost of equipping limiting rods of different lengths and the time spent installing the limiting rods on the limiting plate 81.

[0057] Example 2:

[0058] Reference Figure 6 , Figure 7 The difference from Embodiment 1 is that the second connecting rod 432 has a second mounting groove 4321 for mounting the first limiting member 433 on its surface near the first connecting rod 431. The first limiting member 433 includes a push rod 4331 built into the second mounting groove 4321, a first spring 4332 fixedly connected to the push rod 4331, and a first limiting block 4333 abutting against the other end of the push rod 4331.

[0059] In this embodiment, the push rod 4331 is slidably connected to the second mounting groove 4321, the other end of the first spring 4332 is fixedly connected to the inner wall of the second mounting groove 4321, the first limiting block 4333 is disposed at the end of the push rod 4331 away from the first spring 4332, the push rod 4331 is provided with a first slot 9, and the push rod 4331 is provided with a first guide groove 91 communicating with the first slot 9. The first guide groove 91 is disposed at the end of the first slot 9 away from the first spring 4332. In this embodiment, the depth of the first guide groove 91 gradually decreases towards the end away from the first spring 4332. The lower end of the first limiting block 4333 is fixedly connected to a sliding block 10 slidably connected to the first slot 9. In this embodiment, the diameter of the sliding block 10 is larger than the diameter of the first limiting block 4333, and the sliding block 10 is hemispherically disposed near the surface of the first slot 9. The second connecting rod 432 has a second limiting hole 4322 through which the first limiting block 4333 passes. The second limiting hole 4322 is connected to the first limiting hole 4311. In this embodiment, the first spring 4332 forces the push rod 4331 to move toward the direction closer to the first connecting rod 431.

[0060] Regarding how to push the first limiting block 4333 through the second limiting hole 4322 and the first limiting hole 4311, in this embodiment, a connecting rope 61 is fixedly connected to one end of the push rod 4331 near the first spring 4332, such as... Figure 6 , Figure 8 As shown, the connecting rope 61 is coaxially threaded through the first spring 4332 and also through the second connecting rod 432, and is fixedly connected to the bolt of the second limiting bolt. It can be fixedly connected to the second limiting bolts on the two second columns 5. If it is the second limiting bolt on the second column 5 equipped with the winding member 53, the length of the limiting rod can be fixed at the same time as the length of the protective net 51.

[0061] By rotating the second limiting bolt, the connecting rope 61 is wound around, thereby pulling the push rod 4331 to rotate away from the first connecting rod 431. This causes the first limiting block 4333 to slide and connect to the first guide groove 91 and then rise up, sliding into the second limiting hole 4322 and the first limiting hole 4311 that are set opposite to each other at this time, thereby limiting the sliding of the second connecting rod 432 and completing the adjustment of the length and height of the guardrail body 2.

[0062] Example 3:

[0063] Reference Figure 9 , Figure 10 The difference from Embodiment 2 is that, for the guardrail body 2 in this embodiment, when used alone, since the second plate 42 is slidably connected to the first plate 41, it is inconvenient to limit the guardrail body 2, which is set alone at this time, by means of the limiting rod.

[0064] Reference Figure 10 , Figure 11 Therefore, in this embodiment, the first threaded hole 52 opened on the second column 5 away from the winding member 53 extends to the opposite side walls of the second column 5, the second limiting bolt is threaded through the first threaded hole 52, the side wall of the first plate 41 is provided with a third sliding groove 412 that communicates with the first threaded hole 52, and the limiting component 43 also includes a sliding rod 434 that is slidably connected to the third sliding groove 412, an abutment rod 435 that is fixedly connected to one end of the sliding rod 434, a second spring 436 that is coaxially sleeved on the abutment rod 435, and a second limiting block 437 that abuts against the other end of the sliding rod 434.

[0065] In this embodiment, the second limiting block 437 is disposed at the end of the slide rod 434 away from the second spring 436. The slide rod 434 has a second slot 4341 and a second guide groove 4342 communicating with the second slot 4341. The second guide groove 4342 is disposed at the end of the second slot 4341 close to the second spring 436. In this embodiment, the depth of the second guide groove 4342 gradually decreases towards the end close to the second spring 436. The lower end of the first limiting block 4333 is also fixedly connected to a sliding block 10 slidably connected to the first slot 9. The diameter of the sliding block 10 is larger than the diameter of the second limiting block 437. The surface of the first plate 41 close to the second plate 42 has a third limiting hole 413 communicating with the third slide groove 412. The second plate 42 has a fourth limiting hole 422 communicating with the third limiting hole 413. In this embodiment, the second spring 436 forces the slide rod 434 to move towards the direction close to the first threaded hole 52.

[0066] Regarding how to push the second limiting block 437 through the third limiting hole 413 and the fourth limiting hole 422, in this embodiment, the second limiting bolt is rotated so that the second limiting bolt moves toward the direction of the first sliding groove 411. When the second limiting bolt abuts against the sliding rod 434, during the continued rotation, the sliding rod 434 moves away from the second spring 436, so as to push the second limiting block 437 to slide and connect to the second guide groove 4342. As the second guide groove 4342 rises, it slides and inserts into the third limiting hole 413 and the fourth limiting hole 422 that are set opposite to each other at this time, thereby restricting the sliding of the second plate 42.

[0067] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A guardrail suitable for pre-drilled holes of various sizes, characterized in that: The system includes several guardrail bodies (2) that are installed around a reserved opening (1). There are at least four guardrail bodies (2) installed at a single reserved opening (1). Adjacent guardrail bodies (2) are connected by connecting components (21) for detachable connection. Each guardrail body (2) includes two first posts (3) and a telescopic plate mechanism (4) installed between the two first posts (3). The telescopic plate mechanism (4) includes a first plate (41), a second plate (42) that is slidably connected to the first plate (41), and a limiting mechanism. The second plate (42) slides with a limiting component (43), the limiting component (43) including a limiting rod, the two ends of the first plate (41) and the second plate (42) that are far apart from each other are respectively disposed on the surfaces of the two first columns (3) that are close to each other; the connecting component (21) includes a connecting plate (211) disposed on the first column (3) and a connector (212) that connects two adjacent connecting plates (211), the two ends of the limiting rod are respectively disposed on the connecting plates (211) that are diagonally disposed; The limiting rod includes a first connecting rod (431), a second connecting rod (432) slidably connected to the first connecting rod (431), and a first limiting member (433) that restricts the sliding of the second connecting rod (432). The first connecting rod (431) and the second connecting rod (432) are respectively hinged to a mounting plate (7) at their ends that are far apart from each other. The mounting plate (7) is installed on the connecting plate (211) through a connector (212). The guardrail body (2) also includes two second posts (5) that are slidably connected to the two first posts (3) and a second limiting member (6) that restricts the sliding of the second posts (5). A flexible protective net (51) is provided between the second posts (5), and one of the second posts (5) is provided with a winding member (53) for winding up the protective net (51). The second column (5) has a first mounting groove (54) for mounting the winding component (53). The winding component (53) includes a rotating rod (531) built into the first mounting groove (54) and a coil spring (532) fixedly connected to the rotating rod (531). The length direction of the rotating rod (531) is parallel to the height direction of the second column (5). The rotating rod (531) is rotatably connected to the two opposite walls of the first mounting groove (54). The second limiting component (6) includes a second limiting bolt. The first column (3) has a through hole (33). The second column (5) has a plurality of first threaded holes (52) connected to the through hole (33) along its length direction. The second limiting bolt passes through the through hole (33) and is threadedly connected to the first threaded hole (52). The second connecting rod (432) has a second mounting groove (4321) for the first limiting member (433) to be installed. The first limiting member (433) includes a push rod (4331) built into the second mounting groove (4321), a first spring (4332) fixedly connected to the push rod (4331), and a first limiting block (4333) abutting against the other end of the push rod (4331). The first limiting block (4333) is located at the end of the push rod (4331) away from the first spring (4332). The push rod (4331) has a first slot (9) for the first limiting block (4333) to slide into. The push rod (4331) has a first guide groove (91) communicating with the first slot (9). The first guide groove (91) is located at the first slot (9) away from the first spring (4332). 2) At one end, the depth of the first guide groove (91) gradually decreases toward the end away from the first spring (4332), and the first spring (4332) forces the push rod (4331) to move toward the first connecting rod (431); the first connecting rod (431) has a plurality of first limiting holes (4311) through it along its own length, and the second connecting rod (432) has a second limiting hole (4322) for the first limiting block (4333) to pass through, the second limiting hole (4322) is connected to the first limiting hole (4311), a connecting rope (61) is fixedly connected to the push rod (4331), the connecting rope (61) is coaxially passed through the first spring (4332), the connecting rope (61) is passed through the second connecting rod (432), and is fixedly connected to the bolt of the second limiting bolt.

2. The guardrail applicable to pre-reserved holes of multiple sizes according to claim 1, characterized in that: There are two limiting rods, which are staggered.

3. A guardrail suitable for pre-drilled holes of multiple sizes according to claim 1, characterized in that: The rotating rod (531) is fixedly connected to a limiting plate (81). The length direction of the limiting plate (81) is parallel to the length direction of the rotating rod (531). The limiting plate (81) has a plurality of second threaded holes (811) along its own length direction. The second threaded holes (811) are set relative to the first threaded hole (52). The second threaded holes (811) are connected to the first threaded hole (52). The second limiting bolt is threadedly connected to the second threaded hole (811).

4. A guardrail suitable for pre-drilled holes of multiple sizes according to claim 1, characterized in that: The first threaded hole (52) of the second column (5) away from the winding member (53) extends to the opposite side walls of the second column (5). The second limiting bolt is threaded through the first threaded hole (52). The side wall of the first plate (41) is provided with a third sliding groove (412) that communicates with the first threaded hole (52). The limiting assembly (43) also includes a sliding rod (434) slidably connected to the third sliding groove (412), an abutment rod (435) fixedly connected to one end of the sliding rod (434), a second spring (436) coaxially sleeved on the abutment rod (435), and a second limiting block (437) abutting the other end of the sliding rod (434). The second limiting block (437) is provided at the end of the sliding rod (434) away from the second spring (436). The sliding rod (434) is provided with a space for the second limiting block (437) to be inserted. 37) The second slot (4341) is slidably inserted. The slide rod (434) has a second guide groove (4342) connected to the second slot (4341). The second guide groove (4342) is located at one end of the second slot (4341) near the second spring (436). The depth of the second guide groove (4342) gradually decreases towards the end near the second spring (436). The second spring (436) forces the slide rod (434) to move towards the direction near the first threaded hole (52). The second limiting bolt abuts against the slide rod (434). The surface of the first plate (41) near the second plate (42) has a third limiting hole (413) connected to the third slide groove (412). The second plate (42) has a fourth limiting hole (422) connected to the third limiting hole (413).

5. A guardrail suitable for pre-drilled holes of multiple sizes according to claim 1, characterized in that: The first plate (41) and the second plate (42) are provided with hooks (44) protruding from the surface of the protective net (51), and the hooks (44) are hung on the protective net (51).

6. A guardrail suitable for pre-reserved holes of multiple sizes according to claim 1, characterized in that: The lower end of the first column (3) is provided with a base (31).

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