Detachable mounting device for guideboard of road guardrail

Abstract

The utility model relates to the technical field of guideboard installation, and provides a detachable guideboard installation device of a road guardrail, which comprises a guardrail frame and a guardrail arranged on the side edge of a road, an installation plate is arranged on one side of the guardrail frame, a rotating shaft is arranged on one side of the installation plate, a clamping ring assembly is rotatably connected to the rotating shaft, and a front fixing plate is arranged on one side, away from the rotating shaft, of the installation plate. The side, away from the rotating shaft, of the clamping ring assembly is connected with the rear fixing plate, the front fixing plate and the rear fixing plate are provided with connecting assemblies and can be connected through the connecting assemblies, a penetrating groove used for containing the guideboard main rod is formed between the clamping ring assembly and the mounting plate, and the clamping ring assembly and the mounting plate make contact with the guideboard main rod. The clamping device is used for clamping and fixing the guideboard main rod. The highway guideboard can be rapidly installed on a guardrail on the side edge of a highway, the installation efficiency is high, the highway guideboard can adapt to guardrails of various sizes, practicability is good, meanwhile, manufacturing is easy, raw materials are cheap, and economical efficiency is good.

Description

Technical Field

[0001] This utility model relates to the field of road sign installation technology, specifically to a detachable road sign installation device for highway guardrails. Background Technology

[0002] Highway signs, also known as road traffic signs, are graphic symbols that display traffic regulations and road information. They provide a vivid, concrete, and concise expression of traffic regulations, as well as information that is difficult to describe in words. They are used to manage traffic, indicate driving directions, and ensure smooth traffic flow and driving safety. They are applicable to highways, urban roads, and all special-purpose roads, and have the nature of laws, which vehicles and pedestrians must abide by.

[0003] Highway signs come in various types, such as roadside signs, cantilever signs, and gantry signs. Roadside signs consist of a signboard and a main pole attached to the signboard. The main pole is usually set on one side of the road. Its installation requires steps such as positioning, excavation, and pouring, which is cumbersome, labor-intensive, inefficient, and uneconomical.

[0004] Therefore, in order to address the above problems, a detachable road sign installation device for highway guardrails is proposed. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by developing a detachable road sign installation device for highway guardrails. This invention enables the installation of highway road signs on the side guardrails of highways, and the installation is quick and efficient. It can adapt to guardrails of various sizes, is highly practical, and is simple and inexpensive to manufacture, making it economical.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] A detachable road sign installation device for a highway guardrail includes: a guardrail frame, installed on the guardrail on the side of the highway; an installation plate is installed on the side of the guardrail frame closest to the highway; a rotating shaft is installed on one side of the installation plate, the axis of the rotating shaft being perpendicular to the ground; a retaining ring assembly is rotatably connected to the rotating shaft; a front fixing plate is installed on the side of the installation plate away from the rotating shaft; a rear fixing plate is connected to the side of the retaining ring assembly away from the rotating shaft; a connecting assembly is installed on the front and rear fixing plates, and the front and rear fixing plates are connected by the connecting assembly; a through groove for accommodating the main pole of the road sign is formed between the retaining ring assembly and the installation plate; and both the retaining ring assembly and the installation plate are in contact with the main pole of the road sign for clamping and fixing the main pole of the road sign.

[0008] Preferably, the guardrail frame is U-shaped and is used to be secured to the guardrail on the side of the highway.

[0009] Preferably, the guardrail frame includes a main frame and a movable plate. The main frame is L-shaped, with a mounting plate at one end of the L-shape and the movable plate movably connected to the other end of the L-shape. The movable plate is slidably mounted on the main frame via a locking assembly. The movable plate and the main frame can cooperate to clamp the surface of the guardrail. A friction layer is provided on the side of the movable plate that is close to the main frame for contact with the surface of the guardrail. The surface of the friction layer includes several friction lines.

[0010] Preferably, the locking assembly includes a locking screw, a sliding groove is formed through the main frame, the length of the sliding groove is parallel to the length of the main pole of the road sign after installation, the locking screw is rotatably installed in the sliding groove, the axis of the locking screw is parallel to the length of the sliding groove, and one end of the locking screw passes through the side of the sliding groove and is provided with a locking knob, the locking knob can drive the locking screw to rotate, the moving plate is threadedly connected to the locking screw, and rotating the locking screw can drive the moving plate to slide along the length of the sliding groove.

[0011] Preferably, the retaining ring assembly includes a buckle, which includes a straight plate and an arc plate. One side of the straight plate is rotatably connected to a rotating shaft, and the other side of the straight plate is connected to one side of the arc plate. The other side of the arc plate is connected to a rear fixing plate. The arc plate is set to a semi-circular arc shape, and the diameter of the arc plate is not greater than the length of the mounting plate.

[0012] Preferably, the system also includes an adjustment assembly, comprising an adjustment plate and an adjustment screw. The adjustment screw passes through the middle of the arc plate and is threadedly connected to the arc plate. The axis of the adjustment screw is perpendicular to the axis of the arc plate and is coplanar with the axis of the arc plate. One end of the adjustment screw is rotatably connected to the adjustment plate, and the other end of the adjustment screw is provided with an adjustment knob. The adjustment knob can drive the adjustment screw to rotate. The adjustment plate is a semi-circular plate, and the outer diameter of the adjustment plate is the same as the inner diameter of the arc plate. The adjustment plate is located on the side of the arc plate near the mounting plate. A guide rod is also provided on the adjustment plate. The guide rod slides through the arc plate, and the axis of the guide rod is parallel to the axis of the adjustment screw. A pressure-fixing layer is provided on the surface of the adjustment plate away from the guide rod. The pressure-fixing layer is used to contact the surface of the main pole of the road sign.

[0013] Preferably, the connecting assembly includes a retaining buckle and a pull connector. The retaining buckle is disposed on the front fixing plate and the pull connector is disposed on the rear fixing plate, or the retaining buckle is disposed on the rear fixing plate and the pull connector is disposed on the front fixing plate. A notch is provided on the retaining buckle, and the opening of the notch faces the side away from the pull connector.

[0014] Preferably, the connecting component includes a bracket, a handle, and a pull rod. The bracket is bolted to a rear or front fixed plate. The handle is rotatably connected to the bracket, and a pull shaft is rotatably mounted on the handle. Both ends of the pull shaft have connecting holes perpendicular to the axis of the pull shaft. The pull rod is a U-shaped rod, with both ends inserted into the connecting holes at both ends of the pull shaft. Both ends of the pull rod have external threads, and nuts are threaded onto both ends of the pull rod to prevent the pull rod from coming out of the connecting holes. Rotating the handle allows the pull rod to engage with the notch on the fixing buckle to secure the main pole of the road sign.

[0015] Preferably, nuts are connected to both ends of the pull rod at the positions on both sides of the connecting hole to temporarily fix and adjust the position of the pull rod relative to the pull shaft.

[0016] The effects provided in the utility model description are merely those of the embodiments, and not all the effects of the utility model. The above technical solution has the following advantages:

[0017] This invention, by incorporating a guardrail frame, a retaining ring assembly, and a connecting assembly, enables the rapid installation of road signs onto roadside guardrails, avoiding cumbersome construction processes and improving installation efficiency. The adjustable assembly accommodates road sign poles of varying diameters, enhancing practicality. Furthermore, the added clamping layer increases the stability of the connection between the device and the road sign pole, preventing rotation that could alter the sign's orientation and hinder visibility for road users, thus further improving usability. The inclusion of a movable plate and locking assembly allows the device to be applied to guardrails of different sizes, further enhancing its practicality and stability. Finally, the overall structure is simple, with low production costs and good economic efficiency. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present utility model. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the structure of the connecting component according to an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram showing the position of the locking component in an embodiment of the present invention;

[0023] Figure 5This is a schematic diagram showing the position of the adjustment component in an embodiment of the present invention.

[0024] In the diagram, 1. Guardrail frame; 2. Mounting plate; 3. Rotating shaft; 4. Clamping ring assembly; 5. Front fixing plate; 6. Rear fixing plate; 7. Connecting assembly; 8. Adjusting assembly; 11. Main frame; 12. Moving plate; 13. Locking assembly; 14. Friction layer; 111. Sliding groove; 131. Locking screw; 132. Locking knob; 141. Friction texture; 41. Buckle; 411. Straight plate; 412. Curved plate; 71. Fixing buckle; 72. Connecting piece; 711. Notch; 721. Bracket; 722. Handle; 723. Pull rod; 723. Pull shaft; 724. Nut; 81. Adjusting plate; 82. Adjusting screw; 83. Adjusting knob; 84. Guide rod; 85. Pressure layer. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1-5 As shown, this utility model provides a technical solution:

[0027] A detachable road sign installation device for a highway guardrail includes: a guardrail frame 1, installed on the guardrail on the side of the highway; an installation plate 2 is installed on the side of the guardrail frame 1 closest to the highway; a rotating shaft 3 is installed on one side of the installation plate 2; when the device is installed in place, the axis of the rotating shaft 3 is perpendicular to the ground, i.e., parallel to the axis of the main pole of the road sign; a retaining ring assembly 4 is rotatably connected to the rotating shaft 3; a front fixing plate 5 is installed on the side of the installation plate 2 away from the rotating shaft 3; a rear fixing plate 6 is connected to the side of the retaining ring assembly 4 away from the rotating shaft 3; a connecting assembly 7 is installed on the front fixing plate 5 and the rear fixing plate 6, and the front fixing plate 5 and the rear fixing plate 6 are connected by the connecting assembly 7; a through groove for accommodating the main pole of the road sign is formed between the retaining ring assembly 4 and the installation plate 2, and both the retaining ring assembly 4 and the installation plate 2 are used to contact the main pole of the road sign to clamp and fix the main pole of the road sign.

[0028] In an optional embodiment, the guardrail frame 1 is configured as a side-lying U-shape for accessing and securing to the guardrail on the side of the highway from the side of the guardrail. An mounting plate 2 is provided on one side of the U-shaped opening of the guardrail frame 1. After the road sign is installed in place, a part of the main pole of the road sign and the guardrail frame 1 can form a U-shape, enclosing one of the guardrail bars within the U-shape, preventing the device from falling off and improving the stability of the device.

[0029] In an optional embodiment, the guardrail frame 1 includes a main frame 11 and a movable plate 12. The main frame 11 is L-shaped, with a mounting plate 2 at one end and the movable plate 12 movably connected to the other end. The movable plate 12 is slidably mounted on the main frame 11 via a locking assembly 13. The movable plate 12 and the main frame 11 can cooperate to clamp the upper and lower surfaces of the guardrail. Friction layers 14 are provided on the sides of the movable plate 12 and the main frame 11 that are close to each other. The friction layers 14 are used to contact the surface of the guardrail to increase friction. The friction layers 14 are made of a material with a high coefficient of friction, such as rubber. The surface of the friction layers 14 includes several friction patterns 141. The friction patterns 141 can enhance the stability of the connection with the guardrail. The friction patterns 141 are set as straight lines or waves, and the length direction of the friction patterns 141 is consistent with the length direction of the guardrail, which prevents the guardrail frame 1 from sliding laterally and improves the stability of the device.

[0030] In an optional embodiment, the locking assembly 13 includes a locking screw 131. A sliding groove 111 is formed through the main frame 11, and the length direction of the sliding groove 111 is parallel to the length direction of the main pole of the road sign after installation. The locking screw 131 is rotatably arranged in the sliding groove 111, and the axis of the locking screw 131 is parallel to the length direction of the sliding groove 111. One end of the locking screw 131 passes through the bottom side of the sliding groove 111 and is coaxially arranged with a locking knob 132. The locking knob 132 can drive the locking screw 131 to rotate. The moving plate 12 is threadedly connected to the locking screw 131. Rotating the locking screw 131 can drive the moving plate 12 to slide along the length direction of the sliding groove 111, so as to achieve clamping of the guardrail with the main frame 11. This has a wider range of applications and improves the practicality of the device.

[0031] In an optional embodiment, the retaining ring assembly 4 includes a buckle 41, which includes a straight plate 411 and an arc plate 412. One side of the straight plate 411 is rotatably connected to the rotating shaft 3, and the other side of the straight plate 411 is connected to one side of the arc plate 412. The other side of the arc plate 412 is connected to the rear fixing plate 6. The arc plate 412 is set to a semi-circular arc shape, and the diameter of the arc plate 412 is not greater than the length of the mounting plate 2 to avoid instability in clamping.

[0032] In an optional embodiment, an adjustment assembly 8 is further included, comprising an adjustment plate 81 and an adjustment screw 82. The adjustment screw 82 passes through the middle of the arc plate 412 and is threadedly connected to the arc plate 412. The axis of the adjustment screw 82 is perpendicular to the axis of the arc plate 412 and coplanar with the axis of the arc plate 412. One end of the adjustment screw 82 is rotatably connected to the adjustment plate 81, and the other end of the adjustment screw 82 is coaxially provided with an adjustment knob 83. The adjustment knob 83 can drive the adjustment screw 82 to rotate. The adjustment plate 81 is configured as a semi-circular plate. Preferably, the outer diameter of the adjustment plate 81 is the same as the inner diameter of the arc plate 412. The adjustment plate 81 is located on the side of the arc plate 412 near the mounting plate 2. A guide rod 84 is also provided on the adjustment plate 81, and the guide rod 84 slides through the arc plate 412. 12. The axis of the guide rod 84 is parallel to the axis of the adjusting screw 82. A pressure layer 85 is provided on the surface of the adjusting plate 81 away from the guide rod 84. The pressure layer 85 is used to contact the surface of the main pole of the road sign. The pressure layer 85 is made of a material with a high coefficient of friction, such as rubber. Several anti-slip patterns are provided on the side of the pressure layer 85 that contacts the main pole of the road sign. The length direction of the anti-slip patterns is consistent with the length direction of the main pole of the road sign. This is used to enhance the friction between the pressure layer 85 and the main pole of the road sign, and to prevent the main pole of the road sign from rotating during the use of the road sign, which would affect the observation of the sign by personnel and improve the safety of the device. More preferably, a rubber layer is provided on the side of the mounting plate 2 that is close to the main pole of the road sign, which further increases the friction and improves the practicality of the device.

[0033] In an optional embodiment, the connecting assembly 7 includes a fixing buckle 71 and a pull member 72. The fixing buckle 71 is disposed on the front fixing plate 5 and the pull member 72 is disposed on the rear fixing plate 6, or the fixing buckle 71 is disposed on the rear fixing plate 6 and the pull member 72 is disposed on the front fixing plate 5. The specific placement of the fixing buckle 71 and the pull member 72 does not affect the use of the connecting assembly 7. The fixing buckle 71 has a notch 711, the opening of which faces away from the pull member 72. The pull member 72 includes a bracket 721, a handle 722 and a pull rod 723. The bracket 721 is connected to the rear fixing plate 6 or the front fixing plate 5 by bolts. A handle 722 is rotatably connected to the front fixing plate 5 and bracket 721. A pull shaft 723 is rotatably mounted on the handle 722. Connecting holes with the axis perpendicular to the axis of the pull shaft 723 are opened at both ends of the pull shaft 723. The pull rod 723 is set as a U-shaped rod. The two ends of the pull rod 723 are respectively inserted into the connecting holes at both ends of the pull shaft 723. The two ends of the pull rod 723 are also provided with external threads. Nuts 724 are threaded to both ends of the pull rod 723 to prevent the pull rod 723 from coming out of the connecting holes. By rotating the handle 722, the pull rod 723 can be engaged with the notch 711 on the fixing buckle 71 to securely fix the main pole of the road sign.

[0034] In an optional embodiment, nuts 724 are connected to both ends of the pull rod 723 at the positions on both sides of the connecting hole, which are used to temporarily fix and adjust the position of the pull rod 723 relative to the pull shaft 723, thereby improving the practicality of the device.

[0035] In an alternative embodiment, the connecting component 7 can also be replaced with a commercially available spring-loaded handle, which, although less convenient to adjust, is more economical.

[0036] In an optional embodiment, at least two sets of mounting devices are connected to the main pole of the road sign to improve the stability of the road sign installed on the guardrail.

[0037] Working principle: First, the guardrail frame 1 is clamped onto the guardrail on the side of the highway. Preferably, at least two guardrail frames 1 are installed at the same position on the guardrail, one above the other. Then, the position of the moving plate 12 on the guardrail frame 1 is adjusted by the locking assembly 13 to temporarily fix the position of the guardrail frame 1 on the guardrail. Then, the adjusting screw 82 is rotated according to the diameter of the main pole of the road sign so that the maximum distance between the adjusting plate 81 and the mounting plate 2 is slightly less than the diameter of the main pole of the road sign. Then, the connecting assembly 7 is opened, the main pole of the road sign is placed in front of the mounting plate 2, and the connecting assembly 7 is locked so that the pressure layer 85 can produce obvious deformation and the main pole of the road sign cannot slide up or down or rotate. If the main pole of the road sign can still slide up or down or rotate after the connecting assembly 7 is locked, the connecting assembly 7 is released and the adjusting screw 82 is rotated again so that the adjusting plate 81 moves towards the mounting plate 2 until the pressure layer 85 can produce obvious deformation after the connecting assembly 7 is locked and the main pole of the road sign cannot move. Then the road sign is installed.

[0038] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] 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 utility model, "multiple" means two or more unless otherwise explicitly specified.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A detachable road sign installation device for highway guardrails, characterized in that, include: A guardrail frame (1) is installed on the guardrail on the side of the highway. A mounting plate (2) is installed on one side of the guardrail frame (1). A rotating shaft (3) is installed on one side of the mounting plate (2). A retaining ring assembly (4) is rotatably connected to the rotating shaft (3). A front fixing plate (5) is installed on the side of the mounting plate (2) away from the rotating shaft (3). A rear fixing plate (6) is connected to the side of the retaining ring assembly (4) away from the rotating shaft (3). A connecting assembly (7) is installed on the front fixing plate (5) and the rear fixing plate (6). The front fixing plate (5) and the rear fixing plate (6) can be connected by the connecting assembly (7). A through groove is formed between the retaining ring assembly (4) and the mounting plate (2) to accommodate the main pole of the road sign. Both the retaining ring assembly (4) and the mounting plate (2) are in contact with the main pole of the road sign for clamping and fixing the main pole of the road sign.

2. A detachable road sign installation device for highway guardrails according to claim 1, characterized in that: The guardrail frame (1) is U-shaped and is used to be attached to the guardrail on the side of the highway.

3. A detachable road sign installation device for highway guardrails according to claim 2, characterized in that: The guardrail frame (1) includes a main frame (11) and a movable plate (12). The main frame (11) is L-shaped. One end of the L-shape is provided with a mounting plate (2), and the other end of the L-shape is movably connected to the movable plate (12). The movable plate (12) is slidably mounted on the main frame (11) through a locking assembly (13). The movable plate (12) and the main frame (11) can cooperate to clamp the surface of the guardrail. A friction layer (14) is provided on the side of the movable plate (12) that is close to the main frame (11) for contacting the surface of the guardrail. The surface of the friction layer (14) includes several friction lines (141).

4. A detachable road sign installation device for a highway guardrail according to claim 3, characterized in that: The locking assembly (13) includes a locking screw (131). A sliding groove (111) is opened through the main frame (11). The length direction of the sliding groove (111) is parallel to the length direction of the main pole of the road sign after installation. The locking screw (131) is rotatably installed in the sliding groove (111). The axis of the locking screw (131) is parallel to the length direction of the sliding groove (111). One end of the locking screw (131) passes through the side of the sliding groove (111) and a locking knob (132) is set thereafter. The locking knob (132) can drive the locking screw (131) to rotate. The moving plate (12) is threadedly connected to the locking screw (131). Rotating the locking screw (131) can drive the moving plate (12) to slide along the length direction of the sliding groove (111).

5. A detachable road sign installation device for a highway guardrail according to claim 2, characterized in that: The snap ring assembly (4) includes a snap fastener (41), which includes a straight plate (411) and an arc plate (412). One side of the straight plate (411) is rotatably connected to the rotating shaft (3), and the other side of the straight plate (411) is connected to one side of the arc plate (412). The other side of the arc plate (412) is connected to the rear fixing plate (6). The arc plate (412) is set as a semi-circular arc, and the diameter of the arc plate (412) is not greater than the length of the mounting plate (2).

6. A detachable road sign installation device for a highway guardrail according to claim 5, characterized in that: It also includes an adjustment assembly (8), comprising an adjustment plate (81) and an adjustment screw (82). The adjustment screw (82) passes through the middle of the arc plate (412) and is threadedly connected to the arc plate (412). The axis of the adjustment screw (82) is perpendicular to the axis of the arc plate (412) and coplanar with the axis of the arc plate (412). One end of the adjustment screw (82) is rotatably connected to the adjustment plate (81), and the other end of the adjustment screw (82) is provided with an adjustment knob (83). The adjustment knob (83) can drive the adjustment screw (82) to rotate. The adjustment plate (81) The plate is set as a semi-circular plate. The outer diameter of the adjusting plate (81) is the same as the inner diameter of the arc plate (412). The adjusting plate (81) is set on the side of the arc plate (412) close to the mounting plate (2). A guide rod (84) is also set on the adjusting plate (81). The guide rod (84) slides through the arc plate (412). The axis of the guide rod (84) is parallel to the axis of the adjusting screw (82). A pressure layer (85) is set on the surface of the adjusting plate (81) away from the guide rod (84). The pressure layer (85) is used to contact the surface of the main pole of the road sign.

7. A detachable road sign installation device for a highway guardrail according to claim 5, characterized in that: The connecting assembly (7) includes a fixing buckle (71) and a pull member (72). The fixing buckle (71) is set on the front fixing plate (5) and the pull member (72) is set on the rear fixing plate (6), or the fixing buckle (71) is set on the rear fixing plate (6) and the pull member (72) is set on the front fixing plate (5). A notch (711) is opened on the fixing buckle (711), and the opening of the notch (711) faces the side away from the pull member (72).

8. A detachable road sign installation device for a highway guardrail according to claim 7, characterized in that: The connecting piece (72) includes a bracket (721), a handle (722), and a pull rod (723). The bracket (721) is mounted on the rear fixed plate (6) or the front fixed plate (5). The handle (722) is rotatably connected to the bracket (721). A pull shaft is rotatably mounted on the handle (722). Connecting holes perpendicular to the axis of the pull shaft are opened at both ends of the pull shaft. The pull rod (723) is a U-shaped rod. The two ends of the pull rod (723) are respectively inserted into the connecting holes at both ends of the pull shaft. The two ends of the pull rod (723) are provided with external threads. Nuts (724) are threaded to both ends of the pull rod (723) to prevent the pull rod (723) from coming out of the connecting holes. By rotating the handle (722), the pull rod (723) can be engaged with the notch (711) on the fixing buckle (71) to secure the main pole of the road sign.

9. A detachable road sign installation device for a highway guardrail according to claim 8, characterized in that: Nuts (724) are connected to both ends of the pull rod (723) at the positions on both sides of the connecting hole, which are used to temporarily fix and adjust the position of the pull rod (723) relative to the pull shaft.

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