Hole protective fence for building construction

Abstract

The utility model discloses a hole protective fence for building construction, which comprises a first fence body, the middle of the first fence body is vertically connected with a first connecting upright post, and two ends of the first fence body are respectively and vertically connected with a first upright post; a second connecting stand column is vertically connected to the middle of the second fence body, and second stand columns are vertically connected to the two ends of the second fence body correspondingly; the first stand column and the second stand column which are adjacent to each other on one side are rotationally and detachably connected together through the first connecting assembly; after the second connecting assembly rotatably and detachably connects the first stand column and the second stand column which are adjacent to each other on the other side together, a fence body structure is formed; the warning board is detachably installed on the upper portion of the fence body structure. The device is good in protection effect, convenient to assemble and disassemble, convenient to recycle and use, and capable of effectively preventing objects from falling off or people from entering by mistake; and the warning board with the corresponding warning slogan is arranged, so that the warning and reminding effects on passersby can be achieved.

Description

Technical Field

[0001] This utility model relates to a protective structure, specifically a protective fence for construction openings. It is mainly used to cover and protect some temporary, unsealed reserved construction openings during construction to prevent outsiders or construction workers from accidentally falling in. It belongs to the field of construction safety protection technology. Background Technology

[0002] In construction projects, temporary, unsealed openings are frequently encountered, such as openings after pile foundation drilling, pre-reserved openings in floors, and structural openings. These openings often pose safety hazards before further construction can proceed. According to Article 4.2 of the "Technical Specification for Safety of High-Altitude Operations in Building Construction" (JGJ), when the shorter side dimension of a non-vertical opening is greater than or equal to 50cm, guardrails or horizontal protective measures should be implemented; when the shorter side dimension of a non-vertical opening is greater than 150cm, guardrails and horizontal safety nets should be used. Therefore, the protection of openings at construction sites is a crucial aspect of safe construction, and the rapid installation and removal of guardrails directly impacts the progress and safety of the construction project.

[0003] Although existing structures are designed with devices specifically for protecting pre-reserved openings during construction, these devices are often complex, time-consuming and labor-intensive to install, difficult to transport, and require a large area, directly impacting their effectiveness. This leads to potential difficulties and dangers in the protection work, creating safety hazards. Furthermore, many protective devices lack relevant safety warning signs or slogans, making them difficult for the public and third parties to identify and quickly recognize potential dangers. Passersby and vehicles may also be unable to quickly perceive the potential safety hazards, increasing the risk of accidents, especially for construction workers or others, with potentially disastrous consequences. In short, these devices are often very inconvenient.

[0004] Therefore, the key to solving the above-mentioned technical problems lies in developing a practical and reliable protective fence for openings that is easy to install and dismantle. Summary of the Invention

[0005] In view of the numerous defects and shortcomings existing in the aforementioned background technology, this utility model makes improvements and innovations, aiming to provide a protective structure for openings with good protective effect and uniform style. This utility model uses simple materials to process into a uniform fence, which is easy to install and dismantle, convenient for reuse, reduces construction costs, effectively prevents objects from falling or people from accidentally entering, and improves the overall safety of the construction site; it reduces the sense of security of surrounding pedestrians, and is equipped with corresponding warning signs with warning slogans, thus playing a warning and reminder role for passers-by, which is conducive to the management and maintenance of public areas and has strong promotional value.

[0006] To solve the above problems and achieve the above-mentioned invention objectives, this utility model provides a protective fence for construction openings by adopting the following design structure and the following technical solution:

[0007] A protective fence for construction openings, comprising:

[0008] The first fence body (1) has a first connecting post (11) vertically connected in the middle, and the two ends of the first fence body (1) are respectively vertically connected to the first post (12).

[0009] The second fence body (2) has a second connecting post (21) vertically connected in the middle and a second post (22) vertically connected at both ends.

[0010] The first connecting component (3) rotatably and detachably connects the first column (12) and the second column (22) adjacent on one side;

[0011] The second connecting component (4) rotatably and detachably connects the first post (12) and the second post (22) on the other side to form a fence body structure with openings at the top and bottom.

[0012] Warning sign (5) can be detachably installed on the top of the fence body structure.

[0013] Preferably, the warning signs (5) are installed above the first connecting post (11) and the second post (22) and above the first post (12) and the second connecting post (21) respectively by bolt assemblies (6), forming a protective fence structure.

[0014] Preferably, the warning sign (5) includes:

[0015] Warning board (51), with safety warning words on it;

[0016] Mounting posts (52) are symmetrically connected to the two ends below the non-warning sign end face of the warning plate (51). Several connecting plate connection holes are opened through the lower part of each mounting post (52).

[0017] Preferably, the first fence body (1) includes:

[0018] The first fence panel (13) has a first connecting post (11) vertically connected to one end and a first post (12) vertically connected to the other end;

[0019] The second fence panel (14) has a first connecting post (11) vertically connected to one end, and the other end is hinged to the first connecting post (11) through several first hinges (15).

[0020] Preferably, the first connecting column (11) and the first column (12) are both square columnar components with open ends and hollow interiors. The upper part of the first connecting column (11) and the first column (12) is also provided with a first connecting through hole that is adapted to the connecting hole of the connecting plate of the warning sign (5).

[0021] Preferably, the second fence body (2) includes:

[0022] The third fence panel (23) has a second connecting post (21) vertically connected to one end and a second post (22) vertically connected to the other end;

[0023] The fourth fence panel (24) has a second connecting post (21) vertically connected to one end, and the other end is hinged to the second connecting post (21) through several second hinges (25).

[0024] Preferably, the second connecting column (21) and the second column (22) are both square columnar components with open ends and hollow interiors. The upper part of the second connecting column (21) and the second column (22) is also provided with a second connecting through hole that is adapted to the connecting hole of the connecting plate of the warning sign (5).

[0025] Preferably, the first connection component (3) includes:

[0026] The first connecting shaft assembly (31) is connected to the first post (12) on the second fence panel (14);

[0027] The first connecting sleeve assembly (32) is connected to the second post (22) on the third fence panel (23);

[0028] The first connecting shaft assembly (31) comprises two “L”-shaped first connecting shafts connected to the first column (12);

[0029] The first connecting sleeve assembly (32) consists of two first connecting sleeves coaxially connected to the corresponding second column (22).

[0030] Preferably, the second connection component (4) includes:

[0031] The second connecting shaft assembly (41) is connected to the second post (22) on the fourth fence panel (24);

[0032] The second connecting sleeve assembly (42) is connected to the first post (12) on the first fence panel (13);

[0033] The second connecting shaft assembly (41) comprises two “L”-shaped second connecting shafts connected to the corresponding second column (22);

[0034] The second connecting sleeve assembly (42) consists of two second connecting sleeves coaxially connected to the corresponding first column (12).

[0035] Preferably, the warning sign (5) can also be sleeved and installed above the first connecting column (11) and the first column (12) and above the second connecting column (21) and the second column (22).

[0036] The working principle is: before use, the operator first confirms the size and shape of the opening (7) that needs to be protected at the construction site to ensure that the structure size of the protective fence matches the actual needs.

[0037] When in use, the operator first checks whether the first hinge (15) on the first fence body (1) is intact and ensures that the second fence guard plate (14) is hinged and securely connected to the first connecting post (11). Then, the operator checks whether the second hinge (25) on the second fence body (2) is intact and ensures that the fourth fence guard plate (24) is hinged and securely connected to the second connecting post (21).

[0038] Then, the two operators cooperate to install the first connecting shaft assembly (31) on the first connecting sleeve assembly (32), and then the two operators cooperate to install the second connecting shaft assembly (41) on the second connecting sleeve assembly (42), thus forming a fence structure of the present invention and completing the installation of the fence body structure.

[0039] Next, the operator inserts the warning signs (5) between the two posts at the top of the fence body structure and then secures them to the corresponding posts with bolt assemblies (6), thus completing the installation of the protective fence structure.

[0040] Finally, the two operators first adjusted the protective fence structure to a square structure at the bottom, and then moved the protective fence structure to the opening (7), so that each fence panel of the protective fence structure was located outside the opening (7), thus completing the installation of the protective fence structure.

[0041] The beneficial effects of this utility model compared with the prior art are:

[0042] 1. This utility model provides a simple, effective, and uniformly styled opening protection structure. It utilizes simple materials to create a uniform fence that is easy to install and dismantle, convenient for reuse, reduces construction costs, effectively prevents objects from falling or people from accidentally entering, improves the overall safety of the construction site, reduces the sense of insecurity among pedestrians, and is beneficial to the management and maintenance of public areas. It has strong promotional value.

[0043] 2. This utility model has a simple structure and a novel and reasonable design. Due to the use of a hinge structure and the cooperation of a connecting shaft and a connecting sleeve, it achieves ease of operation and maintenance. The hinge structure design allows for convenient opening and closing, and also enables folding after disassembly for easy storage and transportation, facilitating necessary inspection, maintenance, or repair work by construction personnel. This operation is more flexible and efficient than a fixed cover. On the other hand, it enhances safety, effectively preventing objects from falling or personnel from accidentally entering, thus improving the overall safety of the construction site. When opened, it provides necessary entry and exit points.

[0044] 3. The enclosure around the opening effectively prevents objects or people from sliding or falling from below the pre-reserved opening, reducing the risk of accidents. The enclosure around the opening better blocks objects or debris that may fall from above, protecting construction workers and pedestrians from injury. In particular, it facilitates the transportation and handling of construction workers, equipment and materials, reduces the sense of insecurity among pedestrians, and is conducive to the management and maintenance of public areas.

[0045] 4. The construction materials used in each component of this utility model are basically made from waste materials such as construction site templates, square tubes, and galvanized thin steel plates through simple on-site processing. This can save construction materials to the greatest extent and the construction method is simple. It has good economic and environmental benefits in green building construction.

[0046] 5. This utility model, by setting up warning signs, can remind construction workers to pay attention to the surrounding environment, avoid accidents, and ensure the safety of construction workers and passers-by. The warning signs, through conspicuous safety words, help reduce the risk of accidents such as falls and collisions.

[0047] 6. This utility model, by setting up warning signs for identification, can help on-site managers quickly identify potential danger areas and carry out corresponding management and supervision; it can not only protect the safety of construction workers, but also reduce safety hazards during construction and reduce the complexity of accident handling;

[0048] 7. The first, second, third, and fourth fence panels of this utility model are all provided with several through holes. The several through holes on the fence panels can not only effectively reduce weight and facilitate installation and operation, but also reduce costs, improve air permeability, reduce wind pressure, and prevent water accumulation, thereby improving overall safety and practicality. At the same time, this design also helps to improve the economy and aesthetics of the protective fence. Attached Figure Description

[0049] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0050] Figure 1 This is one of the schematic diagrams showing the usage state of this utility model;

[0051] Figure 2 This is the second schematic diagram of the usage state of this utility model;

[0052] Figure 3 This is the third schematic diagram of the usage state of this utility model;

[0053] Figure 4 This is one of the overall structural schematic diagrams of this utility model;

[0054] Figure 5 This is the second schematic diagram of the overall structure of this utility model;

[0055] Figure 6 This is the fourth schematic diagram of the usage state of this utility model;

[0056] Figure 7 This is one of the partial structural schematic diagrams of this utility model;

[0057] Figure 8 This is the second partial structural schematic diagram of this utility model;

[0058] Figure 9 This is the third partial structural schematic diagram of this utility model;

[0059] Figure 10This is the fourth partial structural schematic diagram of this utility model;

[0060] Figure 11 This is the fifth partial structural schematic diagram of this utility model;

[0061] In the figure, the numbers are: 1—first fence body, 11—first connecting post, 12—first post, 13—first fence panel, 14—second fence panel, 15—first hinge;

[0062] 2—Second fence body, 21—Second connecting post, 22—Second post, 23—Third fence panel, 24—Fourth fence panel, 25—Second hinge;

[0063] 3—First connecting assembly; 31—First connecting shaft assembly; 32—First connecting sleeve assembly;

[0064] 4—Second connecting assembly; 41—Second connecting shaft assembly; 42—Second connecting sleeve assembly;

[0065] 5—Warning sign, 51—Warning board, 52—Mounting post;

[0066] 6— Bolt assembly;

[0067] 7—Entrance. Detailed Implementation

[0068] To make the technical means, inventive features, objectives, and effects of this utility model readily understandable, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0069] Example 1

[0070] like Figures 1 to 11 The protective fence for construction openings shown includes:

[0071] The first fence body 1 has a first connecting post 11 vertically connected to the middle of the first fence body 1, and first posts 12 vertically connected to both ends of the first fence body 1.

[0072] The second fence body 2 has a second connecting post 21 vertically connected in the middle, and a second post 22 vertically connected at both ends of the second fence body 2.

[0073] The first connecting component 3 rotatably and detachably connects the first column 12 and the second column 22 adjacent on one side.

[0074] The second connecting component 4 rotatably and detachably connects the first post 12 and the second post 22 adjacent on the other side to form a fence body structure with openings at the top and bottom.

[0075] Warning sign 5 is detachably installed on top of the fence structure.

[0076] Furthermore, such as Figure 2 and Figure 3 As shown, the warning signs 5 are respectively installed above the first connecting post 11 and the second post 22 and above the first post 12 and the second connecting post 21 via bolt assemblies 6, forming a protective fence structure.

[0077] In this utility model, the bolt assembly includes a bolt and a nut. The nut is tightened and installed on the end of the bolt to serve as a fastening and limiting function. The bolt is a hexagonal bolt or a flat-head bolt, and the nut is a hexagonal nut or a flat-head nut.

[0078] Specifically, such as Figure 3 As shown, warning sign 5 includes:

[0079] Warning board 51, with safety warning words on it;

[0080] Mounting posts 52 are symmetrically connected to the lower ends of the non-warning sign face of the warning panel 51, and each mounting post 52 has several connecting holes for connecting plates through its lower part.

[0081] More specifically, such as Figure 6 As shown, the first connecting column 11 and the first column 12 are both square columnar components with open ends and hollow interiors. The upper part of the first connecting column 11 and the first column 12 is also provided with a first connecting through hole that matches the connecting hole of the connecting plate of the warning sign 5.

[0082] More specifically, such as Figure 6 As shown, both the second connecting column 21 and the second column 22 are square columnar components with open ends and hollow interiors. The upper part of both the second connecting column 21 and the second column 22 is provided with a second connecting through hole that is adapted to the connecting hole of the connecting plate of the warning sign 5.

[0083] Specifically, such as Figure 9 As shown, the first connection component 3 includes:

[0084] The first connecting shaft assembly 31 is connected to the first post 12 on the second fence panel 14;

[0085] The first connecting sleeve assembly 32 is connected to the second post 22 on the third fence panel 23;

[0086] The first connecting shaft assembly 31 comprises two "L"-shaped first connecting shafts connected to the first column 12;

[0087] The first connecting sleeve assembly 32 consists of two first connecting sleeves coaxially connected to the corresponding second column 22.

[0088] In this invention, the two "L"-shaped first connecting shaft openings on the first column 12 are either coaxially arranged facing upwards or have openings facing each other. The non-connecting end of the upper first connecting shaft assembly 31 is shorter than the non-connecting end of the lower first connecting shaft.

[0089] like Figure 8 and Figure 9 As shown, the second connection component 4 includes:

[0090] The second connecting shaft assembly 41 is connected to the second post 22 on the fourth fence panel 24;

[0091] The second connecting sleeve assembly 42 is connected to the first post 12 on the first fence panel 13;

[0092] The second connecting shaft assembly 41 comprises two "L"-shaped second connecting shafts connected to the corresponding second column 22;

[0093] The second connecting sleeve assembly 42 consists of two second connecting sleeves coaxially connected to the corresponding first column 12.

[0094] In this invention, the two "L"-shaped second connecting shaft openings on the second column 22 are either coaxially arranged facing upwards or have openings facing each other. The non-connecting end of the upper second connecting shaft assembly 41 is shorter than the non-connecting end of the lower second connecting shaft.

[0095] Furthermore, the warning sign 5 can also be fitted and installed above the space between the first connecting column 11 and the first column 12, and above the space between the second connecting column 21 and the second column 22.

[0096] Before using the above-mentioned construction site opening protection fence, it needs to be manufactured and installed as a backup.

[0097] Before use, operators should first confirm the size and shape of the opening 7 that needs to be protected at the construction site to ensure that the structural dimensions of the protective fence match the actual needs.

[0098] When in use, the operator first checks whether the first hinge 15 on the first fence body 1 is intact and ensures that the second fence guard plate 14 is hinged and securely connected to the first connecting post 11. Then, the operator checks whether the second hinge 25 on the second fence body 2 is intact and ensures that the fourth fence guard plate 24 is hinged and securely connected to the second connecting post 21.

[0099] Then, the two operators work together to first install the first connecting shaft assembly 31 onto the first connecting sleeve assembly 32. Subsequently, the two operators work together to install the second connecting shaft assembly 41 onto the second connecting sleeve assembly 42, thus completing the installation of the fence body structure.

[0100] Next, after the operator inserts the warning sign 5 between the two posts at the top of the fence structure, the sign is then securely connected to the corresponding posts using bolt assembly 6, thus completing the installation of the protective fence structure.

[0101] Finally, the two operators first adjusted the protective fence structure to a square shape at the bottom, and then moved the protective fence structure to the opening 7, so that each fence panel of the protective fence structure was located outside the opening 7, thus completing the installation of the protective fence structure.

[0102] When the construction is completed or the protective fence structure is no longer needed, first remove it from the opening 7 at a certain distance from the opening 7, and then fold and store it for the next use. Alternatively, after the warning sign 5 is removed, separate the first fence body 1 and the second fence body 2, clean and store them for the next use.

[0103] During the above installation process, when installing the first connecting component 3 and the second connecting component 4; if both first connecting shafts of the first connecting shaft component 31 and both second connecting shafts of the second connecting shaft component 41 are coaxially open upwards, during installation, one operator holds the second fence guard plate 14 vertically without moving it, while another operator lifts the third fence guard plate 23 upwards, and then moves the two first connecting sleeve components 32 on the third fence guard plate 23 to the top of the corresponding first connecting shaft component 31 for alignment, and then the other operator moves the third fence guard plate 23 downwards until the two first connecting sleeves are respectively fitted onto the corresponding first connecting shafts; the installation process of the second connecting component 4 is the same as that of the first connecting component 3, and will not be repeated here. When the two second connecting sleeves are respectively fitted onto the corresponding second connecting shafts, the installation of the fence body structure is completed;

[0104] If the openings of the two first connecting shafts of the first connecting shaft assembly 31 and the two second connecting shafts of the second connecting shaft assembly 41 are arranged opposite each other, during installation, one operator holds the second fence panel 14 vertically without moving it, while another operator lifts the third fence panel 23 upwards. Then, the first connecting sleeve assembly 32 below the third fence panel 23 is first fitted onto the outside of the first connecting shaft below the second fence panel 14 and then moved downwards. Then, the upper first connecting sleeve assembly 32 is fitted onto the outside of the upper first connecting shaft. The installation process of the second connecting assembly 4 is the same as that of the first connecting assembly 3, and will not be described again here. When the two second connecting sleeves are respectively fitted onto the corresponding second connecting shafts, the installation of the fence body structure is completed.

[0105] During the above installation process, when installing two warning signs 5, there are several different installation methods for the spacing between the two mounting posts 52. The warning signs 5 can be installed above the first connecting post 11 and the second post 22 and above the first post 12 and the second connecting post 21 using bolt assemblies 6 to form a protective fence structure. This connection method can make the protective fence structure more stable. Alternatively, the warning signs 5 can be respectively fitted and installed above the first connecting post 11 and the first post 12 and above the second connecting post 21 and the second post 22, and then connected and fixed together using bolt assemblies 6 to form a protective fence structure.

[0106] In the above-mentioned use, if both the first hinge 15 and the second hinge 25 are detachable hinges, the middle pivot of the detachable hinge structure can be detached, which can not only improve the convenience and economy of maintenance, but also improve the safety and applicability of the guardrail. This design is particularly suitable for guardrail application scenarios that require disassembly, maintenance or frequent movement, making the overall use more efficient and flexible.

[0107] Example 2

[0108] This embodiment 2 is the same as embodiment 1, except that the first fence body 1 includes:

[0109] The first fence panel 13 has a first connecting post 11 vertically connected to one end and a first post 12 vertically connected to the other end.

[0110] The second fence panel 14 has a first connecting post 11 vertically connected to one end, and the other end is hinged to the first connecting post 11 via several first hinges 15.

[0111] In use, the second hinge 25 of this utility model is a movable hinge or a detachable hinge, and the central pivot of the hinge structure is detachable. Several openings are also provided through both the first fence panel 13 and the second fence panel 14. The presence of several openings on the two panels not only effectively reduces weight and facilitates installation and operation, but also lowers costs, improves breathability, reduces wind pressure, and prevents water accumulation, thereby enhancing overall safety and practicality. At the same time, this design also helps to improve the economy and aesthetics of the protective fence.

[0112] The second fence body 2 includes:

[0113] The third fence panel 23 has a second connecting post 21 vertically connected to one end and a second post 22 vertically connected to the other end.

[0114] The fourth fence panel 24 has a second connecting post 21 vertically connected to one end, and the other end is hinged to the second connecting post 21 via several second hinges 25.

[0115] In use, the second hinge 25 is a movable or detachable hinge, and the central pivot of this hinge structure is detachable. Several openings are also provided through both the third and fourth fence panels 23 and 24. The presence of these openings on both panels not only effectively reduces weight and facilitates installation and operation, but also lowers costs, improves air permeability, reduces wind pressure, and prevents water accumulation, thereby enhancing overall safety and practicality. Furthermore, this design also contributes to improving the economy and aesthetics of the protective fence.

[0116] The specific installation and usage are the same as in Example 1, and will not be repeated here.

[0117] Example 3

[0118] Furthermore, from the inside out, injection molding layer, anti-rust layer, waterproof layer and warning layer are sequentially provided on the outer surfaces of the first fence body 1, the second fence body 2, the first connecting component 3 and the second connecting component 4 and the warning sign 5. The warning layer is coated with fluorescent powder.

[0119] Specifically, in this utility model, a polymer wear-resistant material is injection molded onto the injection molding layer; the anti-rust layer includes an epoxy zinc-rich primer and a chlorinated rubber topcoat, as well as an epoxy micaceous iron oxide intermediate paint located between the epoxy zinc-rich primer and the chlorinated rubber topcoat; the waterproof layer is a polyurethane waterproof coating; and the warning layer is a reflective warning tape, reflective film, or reflective paint of a single color or a mixture of multiple colors.

[0120] When in use, the anti-rust paint and waterproof layer on the outside of this utility model can prevent rusting and extend the service life of the entire device, achieving environmental protection and saving resources. At the same time, the outside of the device is coated with a self-luminous fluorescent material, which can clearly mark the location of the laying device at night or in dark indoor and underground construction environments, effectively playing a safety warning role, improving visibility, making it easy for people to identify, and increasing safety in construction and life.

[0121] Meanwhile, in this utility model, all connections referred to are fixed connections, movable connections, or detachable connections. Among them, fixed connections are welded connections or directly processed into an integral structure; movable connections, detachable connections, or split structures are hinged connections, internal and external threaded connections, bayonet connections, plug-in sleeves, bolt assembly connections, or screw connections.

[0122] Finally, it should be noted that the specific embodiments of this utility model have been described in detail above with reference to the accompanying drawings. However, this utility model is not limited to the above-described embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made to it.

Claims

1. A protective fence for construction openings, characterized in that, include: The first fence body (1) has a first connecting post (11) vertically connected in the middle, and the two ends of the first fence body (1) are respectively vertically connected to the first post (12). The second fence body (2) has a second connecting post (21) vertically connected in the middle and a second post (22) vertically connected at both ends. The first connecting component (3) rotatably and detachably connects the first column (12) and the second column (22) adjacent on one side; The second connecting component (4) rotatably and detachably connects the first post (12) and the second post (22) on the other side to form a fence body structure with openings at the top and bottom. Warning sign (5) can be detachably installed on the top of the fence body structure.

2. The protective fence for construction openings according to claim 1, characterized in that, The warning signs (5) are respectively installed above the first connecting post (11) and the second post (22) and above the first post (12) and the second connecting post (21) by bolt assemblies (6), forming a protective fence structure.

3. A protective fence for construction openings according to claim 1 or 2, characterized in that, The warning sign (5) includes: Warning board (51), with safety warning words on it; Mounting posts (52) are symmetrically connected to the two ends below the non-warning sign end face of the warning plate (51). Several connecting plate connection holes are opened through the lower part of each mounting post (52).

4. The protective fence for construction openings according to claim 1, characterized in that, The first fence body (1) includes: The first fence panel (13) has a first connecting post (11) vertically connected to one end and a first post (12) vertically connected to the other end; The second fence panel (14) has a first connecting post (11) vertically connected to one end, and the other end is hinged to the first connecting post (11) through several first hinges (15).

5. A protective fence for construction openings according to claim 1 or 4, characterized in that, Both the first connecting column (11) and the first column (12) are square columnar components with open ends and hollow interiors. The upper part of both the first connecting column (11) and the first column (12) is provided with a first connecting through hole that is adapted to the connecting hole of the connecting plate of the warning sign (5).

6. A protective fence for construction openings according to claim 1, characterized in that, The second fence body (2) includes: The third fence panel (23) has a second connecting post (21) vertically connected to one end and a second post (22) vertically connected to the other end; The fourth fence panel (24) has a second connecting post (21) vertically connected to one end, and the other end is hinged to the second connecting post (21) through several second hinges (25).

7. A protective fence for construction openings according to claim 1 or 6, characterized in that, The second connecting column (21) and the second column (22) are both square columnar components with open ends and hollow interiors. The upper part of the second connecting column (21) and the second column (22) are also provided with a second connecting through hole that is adapted to the connecting hole of the connecting plate of the warning sign (5).

8. A protective fence for construction openings according to claim 1, characterized in that, The first connection component (3) includes: The first connecting shaft assembly (31) is connected to the first post (12) on the second fence panel (14); The first connecting sleeve assembly (32) is connected to the second post (22) on the third fence panel (23); The first connecting shaft assembly (31) comprises two "L"-shaped first connecting shafts connected to the first column (12); The first connecting sleeve assembly (32) consists of two first connecting sleeves coaxially connected to the corresponding second column (22).

9. A protective fence for construction openings according to claim 1, characterized in that, The second connection component (4) includes: The second connecting shaft assembly (41) is connected to the second post (22) on the fourth fence panel (24); The second connecting sleeve assembly (42) is connected to the first post (12) on the first fence panel (13); The second connecting shaft assembly (41) comprises two "L"-shaped second connecting shafts connected to the corresponding second column (22); The second connecting sleeve assembly (42) consists of two second connecting sleeves coaxially connected to the corresponding first column (12).

10. A protective fence for construction openings according to claim 1, characterized in that, The warning sign (5) can also be fitted and installed above the first connecting column (11) and the first column (12) and above the second connecting column (21) and the second column (22).

Images