LED traffic sign for tunnel and construction method thereof

Abstract

The present application relates to an LED traffic sign for a tunnel and a construction method thereof, belonging to the technical field of sign construction. The sign comprises a fixing frame, a support assembly and a light board provided on the fixing frame, the support assembly being used to fix the fixing frame on the top of the tunnel and to adjust the vertical height of the fixing frame, a connecting piece being fixed on the top of the light board, the top end of the connecting piece passing through the middle of the fixing frame, the connecting piece and the fixing frame being vertically hooked and limited, a limiting assembly being provided on the fixing frame, the limiting assembly being used to limit the connecting piece in the horizontal direction, the present application has the effect of improving the firmness of the sign after installation, resisting vibration, preventing the sign from loosening, and avoiding the sign from falling.

Description

Technical Field

[0001] The present application relates to the technical field of sign construction, and in particular to an LED traffic sign for a tunnel and a construction method thereof. Background Art

[0002] Signs in tunnels serve as identification and warnings, providing drivers with traffic information such as distance and speed limits.

[0003] The sign hanging on the top of the tunnel is fixed by screws and nuts. It is convenient for workers to install it. They only need to tighten the nuts.

[0004] The inventor believes that due to the vibration of the mountain and the air flow in the tunnel blowing the sign, the nut becomes loose over time, resulting in the sign being not securely installed or even falling. Summary of the Invention

[0005] In order to improve the firmness of the sign after installation, resist vibration, prevent the sign from loosening, and avoid the sign from falling, the present application provides an LED traffic sign for a tunnel and a construction method thereof.

[0006] In the first aspect, the present application provides an LED traffic sign for a tunnel, which adopts the following technical solution:

[0007] A LED traffic sign for a tunnel includes a fixing frame, a support assembly and a light board provided on the fixing frame. The support assembly is used to fix the fixing frame on the top of the tunnel and to adjust the vertical height of the fixing frame. A connecting piece is fixed on the top of the light board. The top end of the connecting piece passes through the middle of the fixing frame. The connecting piece and the fixing frame are vertically hooked and limited. A limiting assembly is provided on the fixing frame. The limiting assembly is used to limit the connecting piece in the horizontal direction.

[0008] By adopting the above technical solution, the supporting assembly fixes the fixing frame to the top of the tunnel, and the light board is detachably connected to the fixing frame through the connecting piece, and the connecting piece and the fixing frame are fixed by hooks, which is convenient for workers to operate, and realizes the vertical limit fixation of the light board and the fixing frame. The hook connection method avoids the fixing method of nuts and screws, and there is no phenomenon of loosening of nuts due to vibration. At the same time, the connecting piece is limited in the horizontal direction by the limiting assembly, and the connecting piece and the fixing frame also form a limit with each other in the vertical direction, thereby overcoming vibration and achieving the effect of improving the firmness of the sign after installation.

[0009] Optionally, the fixing frame is provided with an elongated hole, the elongated hole is opened along the length direction of the fixing frame, the connecting piece is C-shaped, and the top end of the connection passes through the elongated hole and is embedded in the fixing frame, and the concave side wall of the connecting piece abuts the outer wall of the fixing frame; a cavity is opened in the fixing frame, and the cavity is opened horizontally along the direction perpendicular to the elongated hole, and a limiting hole is opened on the hole wall of the elongated hole directly opposite to the connecting piece, and the limiting hole is connected to the interior of the cavity. The limiting hole is non-circular, and the limiting assembly includes a limiting rod, a spring and a first limiting strip, the spring is located inside the cavity, the limiting rod is arranged along the length direction of the cavity and passes through the cavity, one end of the spring is fixedly connected to the inner wall of the cavity, and the other end is fixedly connected to the outer wall of the limiting rod, the first limiting strip is fixedly connected to the outer wall of the limiting rod, and when the limiting assembly is in use, the end of the limiting rod and the first limiting strip both pass through the limiting hole, the end of the limiting rod abuts against the outer wall of the connecting piece, and the first limiting strip abuts against the hole wall of the elongated hole where the limiting hole is located.

[0010] By adopting the above technical solution, when installing the light board, the operator first pulls the limit rod to retract the end of the limit rod with the first limit strip into the cavity, then passes the top end of the connector through the long hole, hangs the connector on the fixing frame, and then loosens the limit rod. The spring releases the elastic force, the first limit strip passes through the limit hole and the end of the limit rod abuts against the outer wall of the connector. The limit rod is rotated to cause the first limit strip and the limit hole to be misaligned, thereby achieving the effect that the limit rod cannot be pulled out without rotating the limit rod, thereby realizing horizontal limitation of the connector, and the presence of the spring always maintains the limiting state of the limit component on the connector.

[0011] Optionally, when the spring does not rotate and twist along with the limiting rod, there is an angle difference between the projections of the first limiting strip and the limiting hole along the length direction of the limiting rod.

[0012] By adopting the above technical solution, when the limit assembly is in a locked state with respect to the connecting piece, the first limit strip is in tight contact with the wall of the long hole where the limit hole is located. In order to unlock the lock of the limit assembly on the connecting piece, the first limit strip must be entered into the cavity. Once the limit rod is rotated, the spring twists along with the limit rod, and a force is generated to resist the rotation of the limit rod, thereby achieving the effect that the limit assembly cannot be easily unlocked automatically in the natural state.

[0013] Optionally, a positioning hole is provided on the connecting piece, and when the limiting assembly locks the connecting piece, the end of the limiting rod is inserted into the positioning hole.

[0014] By adopting the above technical solution, after the end of the limit rod is inserted into the positioning hole, the connecting piece is limited in the vertical direction. The connecting piece itself and the fixing frame can also form a vertical limit. The double limit further reduces the probability of the light board falling.

[0015] Optionally, a second limit strip is fixed on the outer wall of the limit rod, and the second limit strip is located on the side of the first limit strip close to the connecting piece; when the limit assembly is in a locked state for the connecting piece, the second limit strip abuts against the outer wall of the connecting piece, and when the limit assembly is in an unlocked state for the connecting piece, the second limit strip is stored in the cavity, the second limit strip abuts against the inner wall of the cavity, and the end of the limit rod close to the connecting piece does not enter the elongated hole.

[0016] By adopting the above technical solution, the presence of the second limit bar allows the end of the limit assembly closest to the connector to be stored in the cavity when the limit assembly is in the unlocked state, freeing the operator's hands. Once the second limit bar is stored in the cavity, the second limit bar is rotated to offset it from the limit hole, completing the operation. Freeing the operator's hands, the operator can more conveniently secure the connector to the fixing frame, thereby improving work efficiency.

[0017] Optionally, a rubber strip is fixed on the connecting member, the rubber strip is arranged along the length direction of the connecting member, the rubber strip is located on the concave inner wall of the connecting member, a card slot is opened on the fixing frame, the card slot is opened along the length direction of the fixing frame, and the rubber strip is located in the card slot.

[0018] By adopting the above technical solution, when the connector is installed on the fixing frame, the rubber strip is squeezed to ensure the normal installation of the connector. The rubber strip and the card slot are interlocked, further reducing the possibility of the connector falling off the fixing frame.

[0019] Optionally, the support assembly is provided with two groups, and the support assembly includes a pre-buried pipe, a fixed pipe and an adjusting pipe. One end of the pre-buried pipe is fixed to the top of the tunnel, and a thread is opened inside the pre-buried pipe. Both ends of the outer wall of the pre-adjusting pipe are opened with threads. One end of the adjusting pipe is threadedly connected to the pre-buried pipe, and the other end is threadedly connected to the fixed pipe. The end of the fixed pipe away from the adjusting pipe is hinged to the fixed frame, and the hinge axis is horizontally arranged and arranged along the direction of the line connecting the vertically adjacent support assemblies. The threads at both ends of the adjusting pipe have opposite rotation directions.

[0020] By adopting the above technical solution, the distance between the fixed tube and the embedded tube can be adjusted by rotating the adjusting tube, thereby adjusting the height of the light board in the vertical direction. The fixed tube and the fixing frame are hinged to avoid the need to adjust the two adjusting tubes at the same time. It is also possible to adjust the adjusting tube on one side separately, which makes it easier for workers to operate.

[0021] Optionally, a vacuum section is provided inside the embedded pipe, which divides the threaded area inside the embedded pipe into two sections, and the adjusting pipe is threadedly connected to the threaded area inside the embedded pipe near the tunnel top.

[0022] By adopting the above technical solution, even if the adjusting tube loses the threaded connection with the upper threaded section of the embedded tube due to looseness or various reasons, the adjusting tube and the embedded tube cannot be disconnected, and the lower threaded section of the embedded tube can still prevent the adjusting tube from leaving the embedded tube, which provides double protection and reduces the probability of the light board falling.

[0023] Optionally, a ring is fixed to the end of the limiting rod away from the connecting piece, and an anti-fall line is provided between the light board and the support assembly. The anti-fall line passes through the ring and is used to connect the light board and the support assembly. The anti-fall line is in a taut state.

[0024] By adopting the above technical solution, the anti-fall line plays a role in preventing the light board from falling. At the same time, the tight anti-fall line plays a limiting role on the limit rod, ensuring that the limit rod is in a locked state on the connecting piece.

[0025] In a second aspect, the present application provides a method for constructing an LED traffic sign for a tunnel, which adopts the following technical solution:

[0026] A construction method for an LED traffic sign for a tunnel comprises the following steps:

[0027] S1. Install the fixing frame on the top of the tunnel through the support assembly;

[0028] S2. Hook and fix the connector to the fixing frame;

[0029] S3, releasing the limiting component so that the limiting component forms a limit on the connecting piece;

[0030] S4. Hook one end of the fall arrest line to the support assembly, and then pass the other end through the ring and hook it to the light board.

[0031] S5. Adjust the final vertical position of the light board through the support assembly.

[0032] By adopting the above technical solution, not only can the vertical height adjustment of the light board be achieved, but it can also effectively prevent the light board from loosening due to a long period of time and prevent the light board from falling.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. The support assembly cooperates with the anti-fall wire to adjust the vertical height of the light board and keep the anti-fall wire taut;

[0035] 2. The connector adopts a vertical limit method to cooperate with the limit component to limit the connector in the horizontal direction, avoiding the fixing method of screws and nuts, and avoiding the phenomenon of the light board falling due to loose nuts. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural diagram of an embodiment of the present application;

[0037] Figure 2 is a vertical cross-sectional view of an embodiment of the present application;

[0038] Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A;

[0039] Figure 4 This is a schematic diagram of part of the structure behind the hidden tunnel;

[0040] Figure 5 This is an exploded view to highlight the structure of the rubber strip.

[0041] Explanation of the accompanying reference numerals: 1. Support assembly; 11. Embedded pipe; 12. Adjusting pipe; 13. Fixed pipe; 2. Fixed frame; 21. Long hole; 22. Cavity; 23. Limiting hole; 24. Slot; 3. Connector; 31. Positioning hole; 32. Rubber strip; 33. Positioning groove; 4. Light board; 5. Limiting assembly; 51. Limiting rod; 52. Spring; 53. First limiting strip; 6. Second limiting strip; 7. Vacuum section; 8. Ring; 81. Anti-fall line; 9. Hanging ring. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-5 This application is described in further detail.

[0043] The embodiment of the present application discloses an LED traffic sign for a tunnel.

[0044] refer to Figure 1 and Figure 2 A LED traffic sign for a tunnel includes a fixing frame 2, a supporting assembly 1 is provided between the fixing frame 2 and the top of the tunnel, the supporting assembly 1 fixes the fixing frame 2 to the top of the tunnel, a connecting piece 3 and a light board 4 are provided below the fixing frame 2, the connecting piece 3 and the fixing frame 2 are hooked and fixed in the vertical direction to form a vertical limit, the light board 4 is fixedly connected to the connecting piece 3, and a limiting assembly 5 is also provided on the fixing frame 2, the limiting assembly 5 limits the connecting piece 3 in the horizontal direction, the connecting piece 3 adopts a hooking and fixing method, avoiding the fixing method of screws and nuts, and avoiding the phenomenon of the light board 4 falling due to loose nuts.

[0045] refer to Figure 2 and Figure 3The support assembly 1 includes a pre-buried pipe 11, an adjusting pipe 12 and a fixed pipe 13. The vertical center lines of the pre-buried pipe 11, the adjusting pipe 12 and the fixed pipe 13 are collinear and vertically arranged. The top of the pre-buried pipe 11 is fixedly connected to the top of the tunnel. The pre-buried pipe 11 is provided with a thread and a vacuum section 7. The vacuum section 7 divides the threaded area inside the pre-buried pipe 11 into two parts, upper and lower. The outer walls of both ends of the adjusting pipe 12 are provided with threads and the thread rotation directions are opposite. The top of the adjusting pipe 12 is threadedly connected to the pre-buried pipe 11, and the threaded connection area Located in the upper threaded section area of the embedded pipe 11, the bottom of the adjusting pipe 12 is threadedly connected to the fixed pipe 13, and the end of the fixed pipe 13 away from the adjusting pipe 12 is hinged to the top of the fixing frame 2; the fixing frame 2 is rectangular, and two groups of support assemblies 1 are provided. The two adjacent groups of support assemblies 1 are arranged at intervals on the top of the fixing frame 2 along the length direction of the fixing frame 2. The hinge axis between the fixed pipe 13 and the fixing frame 2 is horizontally arranged along the length direction of the vertical fixing frame 2. The adjusting pipe 12 is rotated to achieve the effect of adjusting the vertical height of the fixing frame 2.

[0046] refer to Figure 4 A long hole 21 is provided on the fixing frame 2, and the long hole 21 is arranged along the length direction of the fixing frame 2. The long hole 21 is located in the middle of the fixing frame 2. The opening of the long hole 21 leaves a through channel for the top of the connecting member 3 to pass through the fixing frame 2.

[0047] refer to Figure 4 and Figure 5 The connector 3 is C-shaped, with a positioning slot 33 at the top. The length of the positioning slot 33 is perpendicular to the length of the fixing frame 2. One end of the positioning slot 33 penetrates the end of the connector 3, leaving a passage for the fixing tube 13 to enter the positioning slot 33. There are two positioning slots 33, and the positions of the positioning slots 33 correspond to the positions of the fixing tube 13. The size of the positioning slots 33 is sufficient to allow the fixing frame 2 to shake relative to the fixing tube 13. After the top of the connector 3 passes through the elongated hole 21, the connector 3 is snapped onto the fixing frame 2. The concave inner wall of the connector 3 is tightly against the fixing frame 2, and the fixing tube 13 is located in the positioning slot 33. The fixing frame 2 has a slot 24 on both the top and bottom surfaces. The slot 24 is arranged parallel to the elongated hole 21. A rubber strip 32 is fixed to the concave inner wall of the connector 3. After the connector 3 is snapped onto the fixing frame 2, the rubber strip 32 is located in the slot 24.

[0048] refer to Figure 2 and Figure 5, a cavity 22 is provided on the fixing frame 2, and the cavity 22 is located on the side of the elongated hole 21 away from the connecting member 3, and the opening direction of the cavity 22 is horizontally opened along the direction perpendicular to the elongated hole 21; a limiting hole 23 is provided on the inner wall of the cavity 22 of the adjacent elongated hole 21, and the limiting hole 23 connects the cavity 22 and the interior of the elongated hole 21. The limiting hole 23 is non-circular. In this embodiment, the limiting hole 23 adopts a rectangular hole shape; a positioning hole 31 is provided on the side wall of the connecting member 3 facing the limiting hole 23; the limiting assembly 5 includes a limiting rod 51, a spring 52 and a first limiting strip 53, one end of the limiting rod 51 is fixed with a circular ring 8, and the other end of the limiting rod 51 passes through the cavity 22, the limiting hole 23 and the elongated hole 21 in sequence and is inserted into the positioning hole 31; The spring 52 is located in the cavity 22, one end of the spring 52 is fixedly connected to the inner wall of the cavity 22, and the other end is fixedly connected to the outer wall of the limit rod 51. The shape of the first limit strip 53 is adapted to the shape of the limit hole 23. The first limit strip 53 is fixed on the outer wall of the end of the limit rod 51 close to the connecting member 3. Without twisting the limit rod 51, only the spring 52 is compressed or released. There is an angle difference between the projection of the first limit strip 53 and the limit hole 23 along the length direction of the limit rod 51; a second limit strip 6 is also fixed on the limit rod 51. The second limit strip 6 is located on the side of the first limit strip 53 close to the connecting member 3. There is a gap between the second limit strip 6 and the first limit strip 53, and the shape of the second limit strip 6 is also adapted to the limit hole 23.

[0049] refer to Figure 2 When the limiting assembly 5 is in the locked state with respect to the connecting member 3, the second limiting strip 6 abuts against the outer wall of the connecting member 3, the end of the limiting rod 51 is inserted into the positioning hole 31, the first limiting strip 53 abuts against the wall of the elongated hole 21 where the limiting hole 23 is located, and the spring 52 is still in an incompletely released state. When the limiting assembly 5 is in the unlocked state with respect to the connecting member 3, the first limiting strip 53 and the second limiting strip 6 are received in the cavity 22 through the limiting hole 23, the second limiting strip 6 abuts against the inner wall of the cavity 22, and the end of the limiting rod 51 close to the connecting member 3 does not enter the elongated hole 21, and does not create any obstruction for the connecting member 3 to pass through the elongated hole 21.

[0050] refer to Figure 2 An anti-fall wire 81 is provided between the support assembly 1 and the light board 4. The anti-fall wire 81 can be made of steel wire. Hooks are fixed to both ends of the anti-fall wire 81. The hook at one end of the anti-fall wire 81 is hooked and fixed to the light board 4. The other end of the anti-fall wire 81 passes through the ring 8 and is hooked and fixed to the outer wall of the embedded pipe 11. A plurality of lifting rings 9 are fixed to the outer wall of the embedded pipe 11. Adjacent lifting rings 9 are spaced apart in the vertical direction, so as to facilitate the preliminary adjustment of the tightness of the anti-fall wire 81. The existence of the anti-fall wire 81 not only serves as a safety for the hanging board, but also prevents the loosening of the limit assembly 5.

[0051] The embodiment of the present application also discloses a construction method of an LED traffic sign for a tunnel.

[0052] The following steps are involved:

[0053] S1. Install the fixing frame 2 on the top of the tunnel through the support assembly 1; the embedded pipe 11 is pre-buried in the top of the tunnel, and the worker first threadedly connects the adjusting pipe 12 to the lower threaded area inside the embedded pipe 11, and then threadedly connects the fixing pipe 13 to the bottom end of the adjusting pipe 12, and then threadedly connects the top of the adjusting pipe 12 to the upper thread inside the embedded pipe 11 through the vacuum section 7.

[0054] S2. Pass the long hole 21 on the top of the connector 3 and hook it to the fixing frame 2, and align the position of the fixing tube 13. Place the fixing tube 13 in the corresponding slot 24 so that the rubber strip 32 is located in the slot 24.

[0055] S3. Release the limiting assembly 5 so that the limiting assembly 5 forms a limit on the connecting member 3; rotate the ring 8 so that the first limiting bar 53 and the second limiting bar 6 pass through the limiting hole 23 and enter the long hole 21 in sequence, and the end of the limiting rod 51 is inserted into the positioning hole 31, and then rotate the ring 8 again so that there is an angle difference between the first limiting bar 53 and the limiting hole 23.

[0056] S4, hook one end of the anti-fall wire 81 to the ring 9, and then hook the other end through the ring 8 and fix it to the light board 4;

[0057] S5. Rotate the adjusting tube 12 again to adjust the final vertical position of the light board 4, and at the same time, tighten the anti-falling wire 81.

[0058] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An LED traffic sign for a tunnel, characterized by: The invention comprises a fixing frame (2), a supporting assembly (1) and a light board (4) arranged on the fixing frame (2), the supporting assembly (1) being used to fix the fixing frame (2) on the top of the tunnel and to adjust the vertical height of the fixing frame (2), a connecting piece (3) being fixed on the top of the light board (4), the top end of the connecting piece (3) passing through the middle of the fixing frame (2), the connecting piece (3) and the fixing frame (2) being vertically hooked and limited, a limiting assembly (5) being arranged on the fixing frame (2), the limiting assembly (5) ) is used to limit the horizontal position of the connecting member (3); the fixing frame (2) is provided with a long hole (21), the long hole (21) is provided along the length direction of the fixing frame (2), the connecting member (3) is C-shaped, the top end of the connecting member (3) passes through the long hole (21) and is then embedded in the fixing frame (2), and the concave side wall of the connecting member (3) abuts against the outer wall of the fixing frame (2); a cavity (22) is provided in the fixing frame (2), and the cavity (22) is horizontally provided along the direction perpendicular to the long hole (21). The elongated hole (21) is opposite to the elongated hole (21) of the connecting member (3). A limiting hole (23) is provided on the hole wall of the elongated hole (21). The limiting hole (23) is communicated with the interior of the cavity (22). The limiting hole (23) is non-circular. The limiting assembly (5) includes a limiting rod (51), a spring (52) and a first limiting strip (53). The spring (52) is located inside the cavity (22). The limiting rod (51) is arranged along the length direction of the cavity (22) and passes through the cavity (22). The spring (5 2) One end is fixedly connected to the inner wall of the cavity (22), and the other end is fixedly connected to the outer wall of the limiting rod (51); the first limiting strip (53) is fixedly connected to the outer wall of the limiting rod (51); when the limiting assembly (5) is in use, the end of the limiting rod (51) and the first limiting strip (53) both pass through the limiting hole (23); the end of the limiting rod (51) abuts against the outer wall of the connecting member (3); and the first limiting strip (53) abuts against the hole wall of the long hole (21) where the limiting hole (23) is located.

2. The LED traffic sign for a tunnel according to claim 1, characterized in that: When the spring (52) does not rotate and twist along with the limiting rod (51), there is an angle difference between the projections of the first limiting strip (53) and the limiting hole (23) along the length direction of the limiting rod (51).

3. The LED traffic sign for a tunnel according to claim 1, characterized in that: A positioning hole (31) is provided on the connecting piece (3); when the limiting assembly (5) is locked to the connecting piece (3), the end of the limiting rod (51) is inserted into the positioning hole (31).

4. The LED traffic sign for a tunnel according to claim 3, characterized in that: A second limiting strip (6) is fixed on the outer wall of the limiting rod (51), and the second limiting strip (6) is located on the side of the first limiting strip (53) close to the connecting member (3); when the limiting assembly (5) is in a locked state with respect to the connecting member (3), the second limiting strip (6) abuts against the outer wall of the connecting member (3); when the limiting assembly (5) is in an unlocked state with respect to the connecting member (3), the second limiting strip (6) is received in the cavity (22), the second limiting strip (6) abuts against the inner wall of the cavity (22), and the end of the limiting rod (51) close to the connecting member (3) does not enter the long strip hole (21).

5. The LED traffic sign for a tunnel according to claim 1, characterized in that: A rubber strip (32) is fixed on the connecting member (3), the rubber strip (32) is arranged along the length direction of the connecting member (3), and the rubber strip (32) is located on the concave inner wall of the connecting member (3). A card slot (24) is provided on the fixing frame (2), the card slot (24) is provided along the length direction of the fixing frame (2), and the rubber strip (32) is located in the card slot (24).

6. The LED traffic sign for a tunnel according to claim 1, characterized in that: The support assembly (1) is provided with two groups, and the support assembly (1) includes a pre-buried pipe (11), a fixed pipe (13) and an adjustment pipe (12). One end of the pre-buried pipe (11) is fixed to the top of the tunnel, and a thread is provided inside the pre-buried pipe (11). Both ends of the outer wall of the pre-adjustment pipe (12) are provided with threads. One end of the adjustment pipe (12) is threadedly connected to the pre-buried pipe (11), and the other end is threadedly connected to the fixed pipe (13). The end of the fixed pipe (13) away from the adjustment pipe (12) is hinged to the fixed frame (2), and the hinge axis is arranged horizontally and along the direction perpendicular to the line connecting adjacent support assemblies (1); the threads at both ends of the adjustment pipe (12) are screwed in opposite directions.

7. The LED traffic sign for a tunnel according to claim 6, characterized in that: The embedded pipe (11) is provided with a vacuum section (7) inside, which divides the threaded area inside the embedded pipe (11) into two sections. The regulating pipe (12) is threadedly connected to the threaded area inside the embedded pipe (11) near the top of the tunnel.

8. The LED traffic sign for a tunnel according to claim 4, characterized in that: A circular ring (8) is fixed to the end of the limiting rod (51) away from the connecting member (3); an anti-falling line (81) is provided between the light board (4) and the supporting assembly (1); the anti-falling line (81) passes through the circular ring (8); the anti-falling line (81) is used to connect the light board (4) and the supporting assembly (1); and the anti-falling line (81) is in a taut state.

9. The LED traffic sign for a tunnel according to claim 8, characterized in that: The construction method includes the following steps: S1, installing the fixing frame (2) on the top of the tunnel through the support assembly (1); S2, hooking and fixing the connecting piece (3) and the fixing frame (2); S3, releasing the limiting component (5), so that the limiting component (5) forms a limit on the connecting member (3); S4, hook and connect one end of the anti-fall line (81) to the support assembly (1), and then pass the other end through the ring (8) and hook and fix it to the light board (4); S5. Adjust the final vertical position of the light board (4) through the support assembly (1).

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