Protective fence

Abstract

The invention discloses a protective fence in the technical field of protective fences, the protective fence comprises two groups of fixing columns, an anti-collision mechanism is arranged on the rear sides of the two groups of fixing columns, the anti-collision mechanism comprises a U-shaped frame, cushion blocks and fixing seats are connected to the outer walls of the rear sides of the two groups of fixing columns, dismounting and mounting assemblies are arranged between the two groups of fixing seats and the U-shaped frame, and a buffer plate is slidably connected to the inner wall of the U-shaped frame. A rear damping unit is arranged between the buffer plate and the inner wall of the U-shaped frame, side damping units are arranged between the outer walls of the two sides of the buffer plate and the inner walls of the two sides of the U-shaped frame, multiple sets of telescopic columns are installed on the front end face of the buffer plate, the outer wall of each set of telescopic columns is sleeved with a damping spring, and an anti-collision plate is installed at the front ends of the multiple sets of telescopic columns; the front end face of the anti-collision plate is provided with a plurality of groups of guide rollers which are rotationally connected, so that the bridge protective fence can buffer an impacted object from multiple directions, and the use safety coefficient of the protective fence is improved; and the anti-collision mechanism can be separated from the guardrail, so that when the guardrail or the anti-collision mechanism is damaged, the whole guardrail or the anti-collision mechanism does not need to be replaced, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of guardrail technology, specifically to a guardrail. Background Technology

[0002] On bridges, guardrails are a crucial safety facility, effectively protecting pedestrians and vehicles from falls or collisions. Guardrails are typically constructed of steel poles or pipes and can be installed on support structures along both sides of the bridge. They also enhance the aesthetics, complementing the bridge and its surroundings to create a safe and visually appealing whole. Furthermore, the materials and colors of guardrails can be customized to meet diverse architectural design requirements. Currently, most bridge guardrails consist of simple fixed posts and steel pipes, offering limited cushioning and lacking multi-layered shock absorption. Their impact resistance is also limited, and damaged guardrails require replacement, increasing operating costs. Therefore, we propose a new type of guardrail. Summary of the Invention

[0003] The purpose of this invention is to provide a protective railing to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A guardrail includes two sets of fixed posts. Upper guardrails and lower guardrails are installed on the top and bottom of the inner sides of adjacent fixed posts, respectively. An anti-collision mechanism is provided on the rear side of both sets of fixed posts. The anti-collision mechanism includes a U-shaped frame. Pads and fixing seats are connected to the outer rear walls of both sets of fixed posts. Both sets of pads are attached to the bottom of the U-shaped frame. Disassembly and assembly components are provided between the fixing seats and the U-shaped frame. The disassembly and assembly components include clamping blocks. A groove adapted to the clamping block is opened on the side of the U-shaped frame near the fixing seat. A buffer plate is slidably connected to the inner wall of the U-shaped frame. A rear shock-absorbing unit is located between the rear side of the buffer plate and the inner wall of the U-shaped frame. Side shock-absorbing units are provided between the outer walls of the buffer plate and the inner walls of the U-shaped frame. Multiple sets of telescopic posts are installed on the front end of the buffer plate. A shock-absorbing spring is fitted on the outer wall of each telescopic post. An anti-collision plate is installed at the front end of the multiple sets of telescopic posts. Multiple sets of rotatably connected guide rollers are provided on the front end of the anti-collision plate.

[0006] Preferably, the rear shock absorber unit includes a crossbar, the two ends of which are connected to the inner wall of the rear end of the U-shaped frame. Two sets of slide blocks are slidably connected on the crossbar, and two sets of return springs are also sleeved on the crossbar. The return springs are located between the outer wall of the slide block and the inner wall of the U-shaped frame. Both sets of slide blocks have inner hinge seats installed on the side near the buffer plate. Two sets of outer hinge seats are connected to the rear side of the buffer plate, and a support rod is provided between adjacent outer hinge seats and inner hinge seats.

[0007] Preferably, the side damping unit includes sliding grooves formed on the inner walls of both sides of the U-shaped frame. Each set of sliding grooves is slidably connected with a sliding block. A telescopic rod is installed between the outer wall of the sliding block and the outer wall of the buffer plate, and a damping spring is sleeved on the outer wall of the telescopic rod. The cross-sections of the sliding grooves and the sliding blocks are both T-shaped.

[0008] Preferably, both sets of fixing columns are connected to a base at their bottom, and grounding bolts are vertically connected to the four corners of the base. Fixing plates are installed on both outer walls of the U-shaped frame near the fixing column. A connecting rod is provided on the front end of the fixing plate, and an anti-detachment plate is rotatably connected to the bottom of the connecting rod. The inner side of the anti-detachment plate is in contact with the front outer wall of the fixing column.

[0009] Preferably, the assembly and disassembly assembly also includes a slide rod, which is slidably connected to the fixed base, and the bottom of the fixed base is through-hole. A movable slide plate is connected to the bottom of the slide rod, and the movable slide plate is slidably connected to the inner wall of the fixed base. The bottom of the movable slide plate is connected to the top of the clamping block. A connecting spring is also fitted on the outer wall of the slide rod. The connecting spring is located between the upper surface of the movable slide plate and the top inner wall of the fixed base. An insertion hole is also provided in the movable slide plate. An L-shaped plate is connected to the rear outer wall of the fixed base, and a pin that matches the insertion hole is slidably connected in the L-shaped plate.

[0010] Preferably, the distance between the bottom of the fixing seat and the top of the pad is equal to the thickness of the U-shaped frame, the upper surface of the pad is also provided with an anti-slip pad, the bottom of the connecting rod is rotatably connected to the anti-detachment plate through a bearing, and the side of the anti-detachment plate near the fixing column is provided with a damping pad.

[0011] Preferably, a pull ring is installed on the top of the slide bar, and the hand-held end of the pull ring is covered with an anti-slip rubber sleeve. The outer surface of the clamping block is provided with a damping pad, and the inner wall of the slot is embedded with staggered protrusions.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] When the bridge guardrail of this invention is impacted by an external force, multiple sets of guide rollers at the front end of the anti-collision mechanism act as a guide, deflecting the direction of the impacting object inwards towards the bridge to prevent it from rushing out of the bridge. Multiple sets of telescopic columns and shock-absorbing springs on the front end of the buffer plate provide initial cushioning. When the buffer plate is subjected to continuous force, the impact force is further cushioned by the action of the crossbar, two sets of sliding blocks, the return spring, and the support rod. As the buffer plate moves, the sliding block moves within the groove, and the lateral movement of the buffer plate is mitigated by the action of the telescopic rod and the damping spring. The impact mechanism enhances the anti-collision performance of the bridge guardrail, strengthens its safety, and improves its operational safety factor. Through the action of two sets of sliding rods, movable sliding plates, and connecting springs within the fixed seats, the bottom locking block can connect or disengage from the slot on the U-shaped frame. Combined with the padding blocks and the anti-detachment plate of the rotating connection, this allows for quick assembly and disassembly of the anti-collision mechanism from the fixed post, facilitating assembly, disassembly, maintenance, and repair by staff. The anti-collision mechanism can be separated from the guardrail; when a single guardrail or anti-collision mechanism is damaged, there is no need to replace the entire structure, reducing maintenance costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is a schematic diagram of another aspect of the structure of the present invention;

[0016] Figure 3 This is a top view of the structure of the present invention;

[0017] Figure 4 This is a side view of the present invention;

[0018] Figure 5 This is a schematic diagram of the anti-collision mechanism of the present invention;

[0019] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle;

[0020] Figure 7 This is a cross-sectional schematic diagram of the connection structure between the fixing seat and the side of the U-shaped frame of the present invention.

[0021] In the diagram: 1. Fixed column; 2. Base; 3. Grounding bolt; 4. Lower guard rod; 5. Upper guard rod; 6. Fixed plate; 7. Connecting rod; 8. Anti-detachment plate; 9. Anti-collision mechanism; 900. U-shaped frame; 901. Anti-collision plate; 902. Guide roller; 903. Buffer plate; 904. Crossbar; 905. Support rod; 906. Outer hinge seat; 907. Inner hinge seat; 908. Slide seat; 909. Return spring; 910. Telescopic column; 911. Shock-absorbing spring; 912. Slide groove; 913. Sliding block; 914. Telescopic rod; 915. Damping spring; 10. Fixed seat; 11. Pad block; 12. Slide rod; 13. Pull ring; 14. Moving slide plate; 15. Connecting spring; 16. Clamping block; 17. Slot; 18. L-shaped plate; 19. Pin; 20. Insertion hole. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1:

[0024] Please see Figure 1-7This invention provides a technical solution: a guardrail. Guardrails are crucial safety facilities on bridges, effectively protecting pedestrians and vehicles from falls or collisions. Existing bridge guardrails are mostly composed of simple fixed posts and steel pipes. Their cushioning effect is generally poor, lacking multi-layered buffering, and their impact resistance is generally limited. Furthermore, when a guardrail is damaged, the entire structure needs to be replaced, resulting in high replacement costs. The new guardrail includes two sets of fixed posts 1. Upper guardrails 5 and lower guardrails 4 are installed on the top and bottom of the inner sides of adjacent fixed posts 1, respectively. An anti-collision mechanism 9 is located on the rear side of both sets of fixed posts 1. The anti-collision mechanism 9 includes a U-shaped frame 900. Pads 11 and fixing seats 10 are connected to the outer rear wall of both sets of fixed posts 1. Both sets of pads 11 are attached to the bottom of the U-shaped frame 900. Disassembly and assembly components are provided between both sets of fixing seats 10 and the U-shaped frame 900. The assembly and disassembly components include a clamping block 16, a slot 17 adapted to the clamping block 16 is provided on the side of the U-shaped frame 900 near the fixed base 10, a buffer plate 903 is slidably connected to the inner wall of the U-shaped frame 900, a rear shock-absorbing unit is provided between the rear side of the buffer plate 903 and the inner wall of the U-shaped frame 900, side shock-absorbing units are provided between the outer walls of both sides of the buffer plate 903 and the inner walls of both sides of the U-shaped frame 900, and multiple sets of telescopic columns 910 are installed on the front end face of the buffer plate 903. Each set of telescopic columns 910 is fitted with a shock-absorbing spring 911 on its outer wall, and anti-collision plates 901 are installed at the front end of the multiple sets of telescopic columns 910. Multiple sets of rotatably connected guide rollers 902 are provided on the front end face of the anti-collision plates 901.

[0025] The components inside the anti-collision mechanism 9 of this invention are pre-made. The pad 11 and the fixing seat 10 are fixedly connected to the outer wall of the fixing column 1, and the upper guard rod 5 and the lower guard rod 4 are fixedly connected to the inner side of the fixing column 1. The tops of the two sets of fixing columns 1 are inclined inward. The two sets of fixing columns 1, multiple sets of upper guard rods 5, lower guard rods 4, and the anti-collision mechanism 9 form a guardrail. In use, the two sets of fixing columns 1 are first fixed to the bridge ground, and the lower guard rods 4 and upper guard rods 5 are respectively fixed to the bottom and top. The guardrail serves a protective function. The U-shaped frame 900 is fixed to the rear side wall of the two sets of fixed posts 1 via a disassembly and assembly assembly between the fixed seat 10 and the U-shaped frame 900. This causes the anti-collision plate 901 at the front of the anti-collision mechanism 9 to protrude. When the guardrail is impacted, the guide roller 902 first contacts the impacting object (the anti-collision plate 901 has a U-shaped cross-section, and both ends of the multiple sets of guide rollers 902 are rotatably connected to the inner wall of the anti-collision plate 901 via bearings). The multiple sets of guide rollers 902 act as a guide, preventing the impacting object from directly impacting the guardrail. The impact plate 901 is deflected inwards towards the bridge to prevent it from running off the bridge. When impacted by an object, the force is transferred to the buffer plate 903. The multiple sets of telescopic columns 910 and shock-absorbing springs 911 on the front end of the buffer plate 903 provide initial buffering. When the buffer plate 903 is subjected to continuous force, the impact force is further buffered by the rear shock-absorbing unit. While the buffer plate 903 is moving, the side shock-absorbing unit can also buffer its lateral movement. This provides shock absorption from multiple directions, improving the anti-collision performance of the bridge guardrail, enhancing its safety, and increasing its safety factor. The disassembly and assembly components allow for quick assembly and disassembly of the U-shaped frame 900 of the anti-collision mechanism 9 and the fixed column 1, facilitating assembly, disassembly, maintenance, and repair by staff. The anti-collision mechanism 9 can be separated from the guardrail, so that if either the guardrail or the anti-collision mechanism is damaged, the entire assembly does not need to be replaced, reducing maintenance costs.

[0026] The rear shock absorber unit includes a crossbar 904, the two ends of which are connected to the inner wall of the rear end of the U-shaped frame 900. Two sets of slide blocks 908 are slidably connected on the crossbar 904. Two sets of return springs 909 are also sleeved on the crossbar 904. The return springs 909 are located between the outer wall of the slide block 908 and the inner wall of the U-shaped frame 900. Inner hinge seats 907 are installed on the side of the two sets of slide blocks 908 near the buffer plate 903. Two sets of outer hinge seats 906 are connected to the rear side of the buffer plate 903. A support rod 905 is provided between the adjacent outer hinge seats 906 and the inner hinge seats 907.

[0027] The two ends of the crossbar 904 are fixedly connected to the inner walls of both sides of the U-shaped frame 900. The two ends of the support rod 905 are rotatably connected to the adjacent outer hinge seat 906 and inner hinge seat 907 respectively. When the buffer plate 903 is subjected to continuous impact, the rotatably connected support rod 905 will tilt, which will drive the slide 908 to slide on the crossbar 904. Since there is a return spring 909 between the outer wall of the slide 908 and the inner wall of the U-shaped frame 900, the impact force on the buffer plate 903 can be damped and buffered for a second time.

[0028] The side damping unit includes a sliding groove 912 opened on the inner walls of both sides of the U-shaped frame 900. Each set of sliding grooves 912 is slidably connected with a sliding block 913. A telescopic rod 914 is installed between the outer wall of the sliding block 913 and the outer wall of the buffer plate 903. The outer wall of the telescopic rod 914 is fitted with a damping spring 915. The cross sections of the sliding groove 912 and the sliding block 913 are both T-shaped.

[0029] The sliding block 913 is fixedly connected to the top of the telescopic rod 914, and the bottom of the telescopic rod 914 is fixedly connected to the outer wall of the buffer plate 903. While the buffer plate 903 is moved under force, the sliding block 913 can slide in the slide groove 912. The damping spring 915 on the outer wall of the telescopic rod 914 is elastic and can play a role in shock absorption and buffering of the left and right movement of the buffer plate 903.

[0030] The bottom of each of the two sets of fixed columns 1 is connected to a base 2, and the four corners of the base 2 are vertically connected to grounding bolts 3. The two outer walls of the U-shaped frame 900 near the fixed column 1 are equipped with fixed plates 6. The front end of the fixed plate 6 is provided with a connecting rod 7, and the bottom of the connecting rod 7 is rotatably connected to an anti-detachment plate 8. The inner side of the anti-detachment plate 8 is in contact with the front outer wall of the fixed column 1.

[0031] When the fixed column 1 is connected to the bridge ground, it can be connected to the bridge ground through the grounding bolt 3 in the base 2. The fixed plate 6 is fixedly connected to the outer wall of the U-shaped frame 900 and the fixed plate 6 is fixedly connected to the connecting rod 7. When the U-shaped frame 900 is installed and used, the anti-detachment plate 8 rotatably connected to the bottom of the connecting rod 7 is attached to the front outer wall of the fixed column 1, which strengthens the connection between the U-shaped frame 900 and the fixed column 1. When disassembling, the rotatable anti-detachment plate 8 can be rotated so that it is not attached to the outer wall of the fixed column 1. The U-shaped frame 900 can then be removed with the help of the disassembly and assembly components.

[0032] The assembly and disassembly assembly also includes a slide rod 12, which is slidably connected to the fixed base 10. The bottom of the fixed base 10 is through-hole. The bottom of the slide rod 12 is connected to a movable slide plate 14, which is slidably connected to the inner wall of the fixed base 10. The bottom of the movable slide plate 14 is connected to the top of the clamping block 16. The outer wall of the slide rod 12 is also fitted with a connecting spring 15, which is located between the upper surface of the movable slide plate 14 and the top inner wall of the fixed base 10. The movable slide plate 14 is also provided with an insertion hole 20. The rear outer wall of the fixed base 10 is connected to an L-shaped plate 18, and a pin 19 that matches the insertion hole 20 is slidably connected in the L-shaped plate 18.

[0033] When the U-shaped frame 9 is connected to the outer wall of the rear end of the fixed column 1, the sliding pin 19 on the L-shaped plate 18 is pulled outward. At this time, the movable slide plate 14 is unrestricted. The sliding rod 12 is pulled up, and the upward pull of the sliding rod 12 causes the movable slide plate 14 to move upward. At this time, the connecting spring 15 is in a compressed state, and the clamping block 16 is stored in the bottom of the inner cavity of the fixed seat 10. At this time, the distance between the bottom of the fixed seat 10 and the top of the pad 11 is equal to the thickness of the U-shaped frame 900. The U-shaped frame 900 can then be installed between the pad 11 and the fixed seat 10. At this time, the slot 17 on the U-shaped frame 900 is aligned with the clamping block 16. After releasing the sliding rod 12, the pressure... The retractable connecting spring 15 can automatically return to its original position, which drives the bottom movable slide plate 14 to move down. The locking block 16 at the bottom of the movable slide plate 14 connects with the slot 17, thus completing the installation of the U-shaped frame 900. At this time, the bottom of the pin 19 is aligned with the insertion hole 20 on the movable slide plate 14. The pin 19 in the L-shaped plate 18 is moved to the front end, so that the pin 19 connects with the insertion hole 20, which reinforces the position of the movable slide plate 14. When disassembling, the pin 19 disengages from the insertion hole 20, and the slide rod 12 is pulled up to make the locking block 16 disengage from the slot 17. With the help of the rotating anti-detachment plate 8, the anti-collision mechanism 9 can be removed.

[0034] The distance between the bottom of the fixing seat 10 and the top of the pad 11 is equal to the thickness of the U-shaped frame 900. The upper surface of the pad 11 is also provided with an anti-slip pad. The bottom of the connecting rod 7 is rotatably connected to the anti-detachment plate 8 through a bearing. The side of the anti-detachment plate 8 close to the fixing post 1 is provided with a damping pad. The anti-slip pad on the pad 11 increases the friction force when it is in contact with the U-shaped frame 900, which improves the stability of the U-shaped frame 900 installation. The damping pad increases the friction force when it is in contact with the outer wall of the front end of the fixing post 1, which improves the stability of the anti-detachment plate 8 when it is in contact with the fixing post 1.

[0035] Example 2:

[0036] Reference Figure 7This embodiment differs from the first embodiment in that: a pull ring 13 is installed on the top of the slide bar 12, and the handheld end of the pull ring 13 is covered with an anti-slip rubber sleeve; a damping pad is provided on the outer surface of the clamping block 16; and staggered protrusions are embedded in the inner wall of the slot 17. The pull ring 13 facilitates the pulling of the slide bar 12, the anti-slip rubber sleeve plays an anti-slip role, preventing the handheld pull ring 13 from slipping off during use, and the damping pad and protrusions increase the friction between the two, further improving the stability of the connection between the U-shaped frame 900 and the outer wall of the fixed column 1.

[0037] Working principle: When using this invention, firstly, place two sets of fixing columns 1 on the bridge ground, and then fix them to the bridge ground using four sets of grounding bolts 3 on the two sets of bases 2. Then, pull up the sliding rods 12 inside the two sets of fixing seats 10. Pulling up the sliding rods 12 causes the moving slide plate 14 to move upward. At this time, the connecting spring 15 is in a compressed state, and the clamping block 16 is stored in the inner cavity of the fixing seat 10. At this time, the distance between the bottom of the fixing seat 10 and the top of the pad 11 is equal to the thickness of the U-shaped frame 900, so the U-shaped frame 900 can be installed between the pad 11 and the fixing seat 10. At this time, the slot 17 is aligned with the clamping block 16. After releasing the sliding rod 12, the compressed connecting spring 15 can automatically return to its original position, thus driving the sliding slide plate 14 to move upward. The bottom movable slide plate 14 moves down, and the clamping block 16 at the bottom of the movable slide plate 14 connects with the slot 17, thus completing the installation of the U-shaped frame 900. At this time, the bottom of the pin 19 is aligned with the insertion hole 20 on the movable slide plate 14. The pin 19 in the L-shaped plate 18 is moved to the front end, so that the pin 19 connects with the insertion hole 20, which reinforces the position of the movable slide plate 14. Then, the anti-detachment plate 8 at the bottom of the connecting rod 7 is rotated so that it fits against the front outer wall of the fixed column 1. When disassembling, the pin 19 disengages from the insertion hole 20, and the slide rod 12 is pulled up to disengage the clamping block 16 from the slot 17. With the anti-detachment plate 8 rotated, the anti-collision mechanism 9 can be removed. When the anti-collision mechanism 9 is installed, the front anti-collision plate 901 protrudes. When the guardrail is impacted, the guide roller 902 first contacts the impacting object. Multiple sets of guide rollers 902 act as a guide, deflecting the impacting object's forward direction inward towards the bridge to prevent it from rushing out of the bridge. When the crash plate 901 is impacted by the impacting object, the force is transferred to the buffer plate 903. Multiple sets of telescopic columns 910 and shock-absorbing springs 911 on the front end of the buffer plate 903 provide initial cushioning. When the buffer plate 903 continues to be subjected to force, the support rod 905 rotatably connected to the rear shock-absorbing unit will tilt, which will drive the slide 908 to slide on the crossbar 904. Since there is a return spring 909 between the outer wall of the slide 908 and the inner wall of the U-shaped frame 900, the impact force on the buffer plate 903 can be further damped and mitigated. As the buffer plate 903 moves, the sliding block 913 can slide within the groove 912. The damping spring 915 on the outer wall of the telescopic rod 914 is elastic and can dampen and buffer the left and right movement of the buffer plate 903. It provides shock absorption and buffering from multiple directions, improving the anti-collision performance of the bridge guardrail, strengthening the safety performance of the guardrail, and increasing the safety factor of the guardrail. Through the function of the disassembly and assembly components, the U-shaped frame 900 of the anti-collision mechanism 9 and the fixed post 1 can be quickly disassembled and assembled, which facilitates the assembly, disassembly, maintenance and repair of the staff. The anti-collision mechanism 9 can be separated from the guardrail. When the guardrail or the anti-collision mechanism is damaged individually, there is no need to replace the whole thing, which reduces maintenance costs.

[0038] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A guardrail comprising two sets of fixed posts (1), characterized in that: Upper guardrail (5) and lower guardrail (4) are installed on the top and bottom of the inner side of adjacent fixed columns (1), respectively. Anti-collision mechanism (9) is provided on the rear side of the two sets of fixed columns (1). The anti-collision mechanism (9) includes a U-shaped frame (900). The rear outer wall of the two sets of fixed columns (1) is connected with pads (11) and fixing seats (10). The two sets of pads (11) are attached to the bottom of the U-shaped frame (900). Disassembly and assembly components are provided between the two sets of fixing seats (10) and the U-shaped frame (900). The disassembly and assembly components include clamping blocks (16). The side of the U-shaped frame (900) near the fixing seat (10) is provided with a slot that matches the clamping block (16). (17) A buffer plate (903) is slidably connected to the inner wall of the U-shaped frame (900). A rear shock-absorbing unit is provided between the rear side of the buffer plate (903) and the inner wall of the U-shaped frame (900). Side shock-absorbing units are provided between the outer walls of both sides of the buffer plate (903) and the inner walls of both sides of the U-shaped frame (900). Multiple sets of telescopic columns (910) are installed on the front end face of the buffer plate (903). Each set of telescopic columns (910) is fitted with a shock-absorbing spring (911) on the outer wall. Anti-collision plates (901) are installed at the front end of the multiple sets of telescopic columns (910). Multiple sets of rotatably connected guide rollers (902) are provided on the front end face of the anti-collision plates (901).

2. A protective fence according to claim 1, characterized in that: The rear shock absorber unit includes a crossbar (904), the two ends of which are connected to the inner wall of the rear end of the U-shaped frame (900). Two sets of slide blocks (908) are slidably connected on the crossbar (904). Two sets of return springs (909) are also sleeved on the crossbar (904). The return springs (909) are located between the outer wall of the slide block (908) and the inner wall of the U-shaped frame (900). Both sets of slide blocks (908) have inner hinge seats (907) installed on the side of the buffer plate (903). Two sets of outer hinge seats (906) are connected to the rear side of the buffer plate (903). A support rod (905) is provided between the adjacent outer hinge seats (906) and the inner hinge seats (907).

3. A protective fence according to claim 1, characterized in that: The side damping unit includes a sliding groove (912) formed on the inner walls of both sides of the U-shaped frame (900). Each set of sliding grooves (912) is slidably connected to a sliding block (913). A telescopic rod (914) is installed between the outer wall of the sliding block (913) and the outer wall of the buffer plate (903). The outer wall of the telescopic rod (914) is fitted with a damping spring (915). The cross-sections of the sliding groove (912) and the sliding block (913) are both T-shaped.

4. A protective fence according to claim 1, characterized in that: The bottom of each of the two sets of fixed columns (1) is connected to a base (2), and the four corners of the base (2) are vertically connected to grounding bolts (3). The outer walls of the U-shaped frame (900) near the fixed column (1) are equipped with fixed plates (6). The front end of the fixed plate (6) is provided with a connecting rod (7), and the bottom of the connecting rod (7) is rotatably connected to an anti-detachment plate (8). The inner side of the anti-detachment plate (8) is in contact with the front end of the fixed column (1).

5. A protective fence according to claim 1, characterized in that: The assembly and disassembly assembly also includes a slide rod (12), which is slidably connected to the fixed base (10), and the bottom of the fixed base (10) is through-hole. The bottom of the slide rod (12) is connected to a movable slide plate (14), which is slidably connected to the inner wall of the fixed base (10), and the bottom of the movable slide plate (14) is connected to the top of the clamping block (16).

6. A protective fence according to claim 5, characterized in that: The outer wall of the slide bar (12) is also fitted with a connecting spring (15), which is located between the upper surface of the movable slide plate (14) and the inner top wall of the fixed seat (10). The movable slide plate (14) is also provided with an insertion hole (20). The rear outer wall of the fixed seat (10) is connected with an L-shaped plate (18), and a pin (19) that matches the insertion hole (20) is slidably connected in the L-shaped plate (18).

7. A protective fence according to claim 4, characterized in that: The distance between the bottom of the fixed seat (10) and the top of the pad (11) is equal to the thickness of the U-shaped frame (900). The upper surface of the pad (11) is also provided with an anti-slip pad. The bottom of the connecting rod (7) is rotatably connected to the anti-detachment plate (8) through a bearing. The side of the anti-detachment plate (8) near the fixed column (1) is provided with a damping pad.

8. A protective fence according to claim 5, characterized in that: The top of the slide bar (12) is equipped with a pull ring (13), and the hand-held end of the pull ring (13) is covered with an anti-slip rubber sleeve. The outer surface of the clamping block (16) is provided with a damping pad, and the inner wall of the slot (17) is embedded with staggered protrusions.

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