Quick mounting and dismounting device for bridge protection net

Abstract

The application provides a quick mounting and dismounting connecting device of bridge anti-throwing net, and belongs to the technical field of bridge safety guarantee device; the device comprises a stand column and a net piece; the stand column is made of C-shaped steel; at least two opposite edges of the net piece are fixedly connected with channel steel; the channel steel openings of two adjacent net pieces on the side close to the stand column are symmetrically buckled in the stand column in opposite directions; the quick mounting and dismounting connecting device of bridge anti-throwing net further comprises at least a fixed plug with soft elasticity on the outer surface; the fixed plug is detachably fixed in the gap between the stand column and the channel steel, and is used for fixedly connecting the channel steel and the stand column; thus, the technical problem that the existing connecting device of bridge anti-throwing net is prone to safety hazards or inconvenient for maintenance and replacement is solved.

Description

Technical Field

[0001] This invention belongs to the technical field of bridge safety assurance devices, specifically relating to a quick installation and dismantling connection device for bridge anti-throw nets. Background Technology

[0002] Anti-throw nets are widely used on urban roads and highway bridges to prevent objects thrown from pedestrians and vehicles from falling off the bridge and causing personal injury, affecting normal vehicle traffic, or causing secondary injuries.

[0003] There are various installation methods for anti-throw netting, including direct pre-embedded type, pre-embedded connection type, external hanging type, internal hanging type, etc. The materials for the posts also vary, including rectangular steel pipes, round steel pipes, angle steel, etc. Common forms of anti-throw netting panels include expanded metal mesh and welded wire mesh.

[0004] The anti-throw netting for overpasses must not only consider safety during construction and the durability of the structure, but also the maintenance and replacement of easily damaged components during use, especially when the anti-throw netting needs to be disassembled and reassembled during bridge inspections.

[0005] Common installation methods for anti-throw nets include: Figure 9 As shown, a post 1a is fixed at the edge of the bridge. The anti-throw net consists of individual mesh panels 2a, each with angle steel 3a welded around its perimeter. A connecting piece 4a is detachably connected to the post 1a, and the end of the connecting piece 4a is detachably fixed to the edge of the angle steel 3a of each mesh panel 2a using bolts and nuts. This facilitates the later inspection and maintenance of the anti-throw net.

[0006] However, in practical applications, the small mesh size of the anti-throw netting creates a large wind-blocking surface, resulting in high stress. Furthermore, the netting vibrates frequently in strong winds or when vehicles pass by, easily damaging the common threaded connection method and causing the nuts to loosen. This is especially true for the nuts at the top connection point of the anti-throw netting, where the significant movement makes them more prone to loosening. This installation method poses a clear safety hazard. However, fixing the anti-throw netting to the posts by welding makes future inspection and replacement inconvenient.

[0007] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0008] The purpose of this invention is to provide a quick installation and disassembly connection device for bridge anti-throw nets, so as to solve the technical problems that existing connection devices for bridge anti-throw nets are prone to safety hazards or are inconvenient to inspect and replace.

[0009] To achieve the above objectives, the present invention provides a quick installation and dismantling connection device for bridge anti-throw nets as follows:

[0010] A quick-installation and dismantling connection device for bridge anti-throw netting includes a column and a net panel. The column (1) is made of C-shaped steel. At least two opposite edges of the net panel are fixedly connected with channel steel. The openings of the channel steel on the side of two adjacent net panels near the column are symmetrically fastened to the column. The quick-installation and dismantling connection device for bridge anti-throw netting also includes a fixing block with at least a soft and elastic outer surface. The fixing block is a detachable fixing plug located in the gap formed between the column and the channel steel for fixing the channel steel and the column.

[0011] As a further optimized technical solution, the fixing block is elongated and is inserted between two back-to-back channel steels. The fixing block is detachably connected with a threaded bolt and a nut. The bolt passes through both the column and the fixing block, and the nut is located on one side of the fixing block.

[0012] As a further optimized technical solution, the cross-section of the fixing block is an isosceles trapezoid, and the side forming the upper base of the isosceles trapezoid faces the inside of the column.

[0013] As a further optimized technical solution, the fixed plug is roughly U-shaped and includes two parallel vertical plugs and a transverse connecting body that fixes the two vertical plugs. The two vertical plugs are respectively used to plug into the gap formed between the channel steel opening and the column.

[0014] As a further optimized technical solution, the fixing block includes a support body and a soft pad layer. The soft pad layer is disposed on two sides of the support body parallel to the length extension direction of the mesh. The support body is provided with a pressing unit, which extends from the two opposite side walls of the support body facing the mesh to tighten the gap formed between the channel steel opening and the column.

[0015] As a further optimized technical solution, the pressing unit includes pressing block assemblies symmetrically arranged in two vertical plug bodies. The pressing block assembly includes a first pressing block and a second pressing block that slide against each other in the direction of column extension. The first pressing block is located outside the second pressing block. A through groove is formed on the side wall of the support body facing the first pressing block. The first pressing block can extend or retract from the through groove. The sides of the first pressing block and the second pressing block opposite each other are inclined surfaces with complementary inclination angles. The side of the second pressing block opposite to its inclined surface slides against the inner side wall of the support body. Driving the second pressing block along the direction of column extension can drive the first pressing block to extend out of the through groove.

[0016] As a further optimized technical solution, the clamping unit also includes a driving component. The driving component includes a screw that passes through the top of the transverse connecting body and extends into the interior of the support body. The screw is threadedly connected to the transverse connecting body. A driving mechanism is provided at the bottom end of the screw. The driving mechanism is fixedly connected to the two second pressure blocks. Rotating the screw can drive the second pressure blocks to slide along the length extension direction of the column through the driving mechanism.

[0017] As a further optimized technical solution, the driving mechanism includes a guide cylinder arranged parallel to the screw axis and a slider slidably installed in the guide cylinder. The guide cylinder is fixedly connected to the bottom wall of the transverse connecting body. The slider rotates with the screw. A driving rod is fixedly connected to the slider. A vertical strip-shaped perforation is opened on the side wall of the guide cylinder. The driving rod extends out from the strip-shaped perforation and is fixedly connected to the second pressure block.

[0018] As a further optimized technical solution, the first pressure block is connected to a reset mechanism, which is used to automatically retract the first pressure block into the support body.

[0019] As a further optimized technical solution, the first pressure block includes a stop part and a pressing part that are integrally arranged perpendicularly to each other. The width of the stop part is greater than the width of the pressing part. The pressing part is used to extend out of the through groove. A reset spring in a pressed state is provided between the stop part and the side wall of the support body where the through groove is opened. The reset spring constitutes the reset mechanism.

[0020] Beneficial effects: By using C-shaped steel for the posts and channel steel for the connection points between the posts and the mesh panels, the structural characteristics of the C-shaped steel and channel steel are cleverly utilized to facilitate the fastening connection. After fastening, a plug is inserted into the gap between the post and the channel steel to achieve a quick connection, which also facilitates quick disassembly. Moreover, the connection is more stable than existing technologies. The outer surface of the fixing plug used for clamping has soft elasticity, which buffers the vibration of the mesh panel after the connection is fixed, preventing the connection from loosening, improving safety performance, and facilitating subsequent inspection and replacement. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein:

[0022] Figure 1 This is a schematic diagram of the overall assembly of the quick-installation and disassembly connection device for the bridge anti-throw net according to Embodiment 1 of the present invention;

[0023] Figure 2 This is an exploded view of the overall structure of the quick-installation and dismantling connection device for the bridge anti-throw net according to Embodiment 1 of the present invention;

[0024] Figure 3 This is a schematic diagram of the mesh structure in Embodiment 1 of the present invention;

[0025] Figure 4 This is a schematic diagram of the overall structure of the quick installation and dismantling connection device for the bridge anti-throw net according to Embodiment 2 of the present invention;

[0026] Figure 5 for Figure 4 A vertical sectional view;

[0027] Figure 6 for Figure 5 Right view of the guide tube in the middle;

[0028] Figure 7 for Figure 4 A schematic diagram of a cross-section;

[0029] Figure 8 for Figure 4 Main view of the first pressing block on the right side of the middle;

[0030] Figure 9 This invention relates to a prior art method for connecting anti-throw nets.

[0031] Figures 1-8 In the middle: 1. Column; 2. Mesh panel; 3. Channel steel; 11 / 21. Fixing block; 4. Bolt; 5. Nut; 211. Support body; 2112. Soft pad layer; 212. Second pressure block; 213. First pressure block; 213a. Stop part; 213b. Pressing part; 214. Through groove; 215. Screw; 216. Return spring; 217. Guide cylinder; 218. Slider; 219. Drive rod; 210. Strip perforation.

[0032] Figure 9 In the middle: 1a, post; 2a, wire mesh; 3a, angle steel; 4a, connecting piece. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0034] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0036] Example 1:

[0037] This invention provides a quick-connect and dismantling device for bridge anti-throw nets. By using C-shaped steel posts and channel steel at the connection points between the netting and the posts, the structural characteristics of the C-shaped steel and channel steel are cleverly utilized to facilitate their fastening connection. After fastening, a plug is inserted into the gap between the post and the channel steel to achieve a quick connection. This plug-fixing method also facilitates quick dismantling.

[0038] Specifically, such as Figure 1 , Figure 2 , Figure 3 As shown, the quick installation and dismantling connection device for bridge anti-throw nets provided by the present invention includes a column 1, a mesh 2, and a fixing block 11. The column 1 is made of C-shaped steel, and the two opposite edges of the mesh 2 are fixedly connected with channel steel 3. When installing the mesh 2, the column 1 and the channel steel 3 are fastened together, and the fixing block 11 is installed after fastening, so as to realize the fastening position of the column 1 and the channel steel 3 and ensure the stability of the connection.

[0039] The bottom of the column 1 is used to fix it to the embedded part of the bridge. The distance between any two adjacent columns 1 is determined by the length of the mesh 2 between them in the tensioned state. The column 1 is made of C-shaped steel, which is roughly in the shape of a long cylinder with a rectangular cross section. One of the side walls has an opening in the middle along the length extension direction, and symmetrical baffles are formed on both sides of the opening.

[0040] The channel steel 3 has three side walls, two of which are parallel and symmetrical, perpendicular to the other connecting side wall. When the channel steel 3 is symmetrically fastened to the column 1, the openings of the two symmetrically arranged channel steel 3s on the side of the adjacent mesh 2 near the column 1 are arranged facing away from each other, and the two baffles of the C-shaped steel extend into the opening of one of the channel steel 3s, thus forming a situation where the baffles and the symmetrical side walls mutually stop each other. Since the mesh 2 is in a taut state, this ensures that even if the fixing block 11 becomes loose, the mutual stopping of the baffles and the symmetrical side walls can ensure that the mesh 2 will not separate from the column 1 within the rescue time, further ensuring the safety performance of the connection.

[0041] As can be seen from the above description, in order to ensure the connection between the mesh 2 and the post 1, channel steel 3 is fixedly connected to the left and right ends of the mesh 2. In other embodiments, in order to ensure the overall strength of the mesh 2, channel steel 3 can also be fixedly connected to the upper and lower ends of the mesh 2.

[0042] In this embodiment, the fixing block 11 is made entirely of rubber, which provides good elasticity and vibration absorption. It also facilitates insertion of the fixing block 11 into the gap between the column 1 and the channel steel 3 for secure connection. In this embodiment, the fixing block 11 is elongated and positioned between two opposing channel steels 3. A threaded bolt 4 and a nut 5 are detachably connected to the fixing block 11. The bolt 4 passes through both the column 1 and the fixing block 11, while the nut 5 is positioned on one side of the fixing block 11. The bolt 4 and nut 5 further ensure the stability of the connection between the block and the column 1. Positioning the nut 5 on one side of the fixing block 11 reduces the impact of vibration on the connection strength of the bolt 4 and nut 5, thus ensuring the secure connection.

[0043] Furthermore, the cross-section of the fixing block 11 is an isosceles trapezoid, with the side forming the upper base of the isosceles trapezoid facing inwards from the column 1. In this way, the two sides of the fixing block 11 have a guiding function, making it convenient to insert the fixing block 11 from the side between the two back-to-back channel steels 3.

[0044] Specifically, when installing the mesh 2, the openings of the two channel steels 3 on the side of the adjacent mesh 2 closest to the column 1 are fastened together and installed inside the column 1. Considering the tension of the mesh 2, the channel steels 3 can be inserted into the column 1 from the top. Then, the fixing block 11 is inserted from the side between the two back-to-back channel steels 3. Then, the bolt 4 is used to pass through the column 1 and the fixing block 11. Finally, the nut 5 is screwed on the end of the bolt 4 close to the fixing block 11, so that the nut 5 presses the fixing block 11 tightly.

[0045] When it is necessary to inspect or replace the mesh 2, first loosen the nut 5, then remove the bolt 4, then remove the fixing plug 11, and then remove the channel steel 3 from the column 1.

[0046] Therefore, this invention enables easy disassembly of the mesh panel 2 while ensuring a more secure connection. This improves safety performance and also facilitates subsequent maintenance and replacement.

[0047] Example 2:

[0048] The difference between this embodiment and embodiment 1 is that this embodiment provides another type of fixing block. The same structure as in embodiment 1 will not be repeated in this embodiment.

[0049] Specifically, such as Figure 4 , Figure 5 , Figure 7 As shown, the fixing block 21 in this embodiment is roughly U-shaped. The fixing block 21 includes two parallel vertical plugs and a transverse connecting body that fixes the two vertical plugs. The two vertical plugs are respectively used to be inserted into the gap formed between the opening of the channel steel 3 and the column 1.

[0050] In this embodiment, the fixing block 21 includes a rigid support body 211 and a soft, elastic padding layer 2112. The padding layer 2112 is disposed on two sides of the support body 211 parallel to the length extension direction of the mesh 2. The purpose of placing the padding layer 2112 in this position is that when the mesh 2 vibrates, it swings back and forth. By placing the padding layer 2112 on two sides of the support body 211 parallel to the length extension direction of the mesh 2, the elasticity of the padding layer 2112 absorbs the energy generated by the vibration when the mesh 2 swings back and forth, thereby effectively reducing the impact of the vibration of the mesh 2 on the stability of the connection.

[0051] The support body 211 has a hollow structure, and a clamping unit is arranged inside the support body 211. This unit extends from the two opposite side walls of the support body 211 facing the mesh 2 to tighten the gap formed between the opening of the channel steel 3 and the column 1. Thus, when processing the support body 211, there is no need to increase the processing precision to ensure the stability of the insertion of the fixing block 21; the presence of the clamping unit can compensate for the dimensional accuracy of the fixing block 21. Furthermore, the presence of the clamping unit allows the size of the support body 211 to be processed slightly smaller than the gap formed between the column 1 and the channel steel 3, thereby facilitating the installation and removal of the fixing block 21. Specifically, after installation, the connection stability is ensured by operating the clamping unit to tighten the gap formed between the opening of the channel steel 3 and the column 1.

[0052] Specifically, such as Figure 5 , Figure 7As shown, the pressing unit includes pressing block assemblies symmetrically arranged in two vertical plug bodies. The pressing block assembly includes a first pressing block 213 and a second pressing block 212 that slide against each other in the length extension direction of the column 1. The first pressing block 213 is located outside the second pressing block 212. A through groove 214 is provided on the side wall of the support body 211 facing the first pressing block 213. The first pressing block 213 can extend or retract from the through groove 214. The sides of the first pressing block 213 and the second pressing block 212 opposite to each other are inclined surfaces with complementary inclination angles. The side of the second pressing block 212 that is away from its inclined surface slides against the inner side wall of the support body 211. Driving the second pressing block 212 in the length extension direction of the column 1 can drive the first pressing block 213 to extend out of the through groove 214.

[0053] Specifically, during installation, the second pressure block 212 is driven downwards, causing it to slide downwards and press against the first pressure block 213 through its inclined surface. The first pressure block 213 then extends outwards, tightening the gap between the opening of the channel steel 3 and the column 1. The presence of the first pressure block 213 and the second pressure block 212 ensures that the inserted portion of the support body 211 is essentially a solid structure, thus guaranteeing the overall structural strength of the fixing block 21 and preventing deformation that could affect subsequent disassembly. Furthermore, the cooperation between the first pressure block 213 and the second pressure block 212 ensures the stability of the connection between the column 1 and the channel steel 3 after the fixing block 21 is installed, and also facilitates the disassembly of the fixing block 21.

[0054] like Figure 5 , Figure 6 As shown, the clamping unit also includes a drive assembly, which includes a screw 215 that passes through the top of the transverse connector and extends into the support body 211. The screw 215 is threadedly connected to the transverse connector. A drive mechanism is provided at the bottom of the screw 215. The drive mechanism is also fixedly connected to two second pressure blocks 212. Rotating the screw 215 can drive the second pressure blocks 212 to slide along the length extension direction of the column 1 through the drive mechanism.

[0055] The drive mechanism specifically includes a guide cylinder 217 arranged parallel to the axis of the screw 215 and a slider 218 slidably installed in the guide cylinder 217. The guide cylinder 217 is fixedly connected to the bottom wall of the transverse connecting body. The slider 218 is rotatably engaged with the screw 215. A drive rod 219 is fixedly connected to the slider 218. A vertical strip-shaped through hole 210 is opened on the side wall of the guide cylinder 217. The drive rod 219 extends out from the strip-shaped through hole 210 and is fixedly connected to the second pressure block 212.

[0056] To facilitate the automatic retraction of the first pressure block 213 into the support body 211 for easy disassembly, the first pressure block 213 is connected to a reset mechanism.

[0057] like Figure 7 , Figure 8As shown, the first pressing block 213 includes a stop portion 213a and a pressing portion 213b integrally arranged perpendicularly to each other. The width of the stop portion 213a is greater than the width of the pressing portion 213b, and the width of the through groove 214 is adapted to the pressing portion 213b, so that the pressing portion 213b can extend and retract within the support body 211 by passing through the through groove 214. The cooperation between the stop portion 213a and the side wall of the support body 211 can prevent the first pressing block 213 from coming out of the through groove 214. In this embodiment, the pressing portion 213b is located in the middle of the stop portion 213a, so that the cross-section of the first pressing block 213 is T-shaped. Thus, a return spring 216 in a pressed state is provided in the symmetrical area on both sides of the pressing portion 213b, that is, between the stop portion 213a and the side wall of the support body 211 where the through groove 214 is opened. The return spring 216 constitutes a return mechanism. Multiple reset springs 216 can be evenly arranged along the length of the support body 211 to ensure the reset effect.

[0058] Specifically, when installing the mesh panel 2, firstly, the openings of the two channel steels 3 on the side of the adjacent mesh panels 2 closest to the column 1 are fastened together and installed inside the column 1. Then, the fixing plug 21 is inserted from the top of the column 1 into the gap formed between the column 1 and the channel steel 3. By rotating the screw 215, the screw 215 moves downward, which drives the slider 218 to slide downward along the guide cylinder 217. At the same time, the drive rod 219 moves downward, which pushes the second pressure block 212 to slide downward. The downward sliding second pressure block 212 pushes the pressing part 213b of the first pressure block 213 to extend outward through the inclined surface, thereby pressing the column 1 and ensuring the stability of the connection.

[0059] After the mesh 2 is installed, the horizontal connecting body of the fixing block 21 is located at the top of the column 1. The mesh 2 at the top position has the greatest vibration amplitude. This structural design of the fixing block 21 strengthens the connection at the top, thereby further ensuring the stability of the connection.

[0060] When the mesh 2 needs to be repaired or replaced, firstly, the screw 215 is rotated in the opposite direction. The screw 215 moves upward, which drives the slider 218 to slide upward along the guide cylinder 217. At the same time, the drive rod 219 moves upward. The upward movement of the drive rod 219 will pull the second pressure block 212 upward. The upward sliding second pressure block 212 makes room for the first pressure block 212 in the width direction. At this time, the return spring 216 pushes the pressing part 213b of the first pressure block 212 to retract into the support body 211, which makes it easy to remove the fixing block 21 from the column 1, and then the mesh 2 is disassembled.

[0061] It is understood that the above description is merely exemplary and the embodiments of this application do not limit the scope of the application.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention shall be within the scope of protection of the pending claims of the present invention.

Claims

1. A quick-installation and dismantling connection device for bridge anti-throw netting, comprising a post (1) and a net panel (2), characterized in that, The column (1) is made of C-shaped steel. At least two opposite edges of the mesh (2) are fixedly connected with channel steel (3). The openings of the channel steel (3) on the side of the adjacent mesh (2) near the column (1) are symmetrically fastened to the column (1). The quick installation and disassembly connection device of the bridge anti-throw net also includes a fixing block with at least a soft and elastic outer surface. The fixing block is a detachable fixing plug in the gap formed between the column (1) and the channel steel (3) for fixing the channel steel (3) and the column (1). The fixed plug is U-shaped and includes two parallel vertical plugs and a transverse connecting body that fixes the two vertical plugs. The two vertical plugs are respectively used to plug into the gap formed between the opening of the channel steel (3) and the column (1). The fixing block includes a support body (211) and a cushion layer (2112). The cushion layer (2112) is disposed on two sides of the support body (211) parallel to the length extension direction of the mesh (2). The support body (211) is provided with a pressing unit for extending from two opposite side walls of the support body (211) facing the mesh (2) to tighten the gap formed between the opening of the channel steel (3) and the column (1). The pressing unit includes pressing block assemblies symmetrically arranged in two vertical plug bodies. The pressing block assembly includes a first pressing block (213) and a second pressing block (212) that slide against each other in the length extension direction of the column (1). The first pressing block (213) is located outside the second pressing block (212). A through groove (214) is provided on the side wall of the support body (211) facing the first pressing block (213). The first pressing block (213) extends out or retracts from the through groove (214). The sides of the first pressing block (213) and the second pressing block (212) opposite to each other are inclined surfaces with complementary inclination angles. The side of the second pressing block (212) away from its inclined surface slides against the inner side wall of the support body (211). Driving the second pressing block (212) along the length extension direction of the column (1) can drive the first pressing block (213) to extend out from the through groove (214).

2. The quick-installation and dismantling connection device for bridge anti-throw nets according to claim 1, characterized in that, The clamping unit also includes a drive assembly, which includes a screw (215) that passes through the top of the transverse connector and extends into the support body (211). The screw (215) is threadedly connected to the transverse connector. The bottom end of the screw (215) is provided with a drive mechanism, which is fixedly connected to the two second pressure blocks (212). Rotating the screw (215) can drive the second pressure blocks (212) to slide along the length extension direction of the column (1) through the drive mechanism.

3. The quick-installation and dismantling connection device for bridge anti-throw nets according to claim 2, characterized in that, The driving mechanism includes a guide cylinder (217) arranged parallel to the axis of the screw (215) and a slider (218) slidably installed in the guide cylinder (217). The guide cylinder (217) is fixedly connected to the bottom wall of the transverse connecting body. The slider (218) is rotatably engaged with the screw (215). A driving rod (219) is fixedly connected to the slider (218). A vertical strip-shaped perforation (210) is opened on the side wall of the guide cylinder (217). The driving rod (219) extends out from the strip-shaped perforation (210) and is fixedly connected to the second pressure block (212).

4. The quick-installation and dismantling connection device for bridge anti-throw nets according to any one of claims 2-3, characterized in that, The first pressure block (213) is connected to a reset mechanism for automatically retracting the first pressure block (213) into the support body (211).

5. The quick-installation and dismantling connection device for bridge anti-throw nets according to claim 4, characterized in that, The first pressure block (213) includes a stop part (213a) and a pressing part (213b) integrally arranged perpendicularly to each other. The width of the stop part (213a) is greater than the width of the pressing part (213b). The pressing part (213b) is used to extend out from the through groove (214). A reset spring (216) in a pressed state is provided between the stop part (213a) and the side wall of the support body (211) where the through groove (214) is opened. The reset spring (216) constitutes the reset mechanism.

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