Adjustable protective net

Abstract

The utility model provides an adjustable protective net which comprises a protective net body and a base arranged on the lower portion of the protective net body, the protective net body comprises two flat box type end portion protective net assemblies which are oppositely arranged, and a middle protective net assembly is arranged between the two end portion protective net assemblies in a penetrating mode. First sliding grooves are formed in the top and the bottom of the middle protection net assembly, first pulleys are arranged on the inner sides of the top and the bottom of the end protection net assembly, and the first pulleys are slidably connected with the corresponding first sliding grooves; the base comprises a lower underframe, an upper bracket and supporting rods evenly connected between the lower underframe and the upper bracket, the two ends of each supporting rod are connected with the lower underframe and the upper bracket through vertical rotating shafts respectively, the included angle between each supporting rod and the lower underframe is adjustable, and the upper bracket is connected with the lower portion of the end protecting net assembly. The width and the height of the device can be adjusted, and the device can meet various protection requirements.

Description

Technical Field

[0001] This utility model relates to the field of building protection equipment technology, and more specifically, to an adjustable protective net. Background Art

[0002] When the existing protective netting at construction sites needs to be extended, multiple connections can be made, but the length after connection may not meet the protection requirements. The height of the protective netting is generally fixed, so in order to adapt to different protection requirements, protective netting of various sizes needs to be made. A large number of protective nettings require a large amount of steel, occupy a lot of space, and are inconvenient to transport. Utility Model Content

[0003] In view of the above problems, the purpose of this utility model is to provide an adjustable protective net, the width and height of which can be adjusted, and it is suitable for various protection requirements.

[0004] This utility model provides an adjustable protective net, comprising a laterally extendable protective net and a height-adjustable base disposed at the lower part of the protective net, wherein...

[0005] The protective net includes two flat box-shaped end net assemblies arranged opposite each other. The opposite sides of the two end net assemblies are both open. An intermediate net assembly is inserted between the two end net assemblies. The top and bottom of the intermediate net assembly are provided with first grooves. The top and bottom inner sides of the end net assemblies are provided with first pulleys that are adapted to the first grooves. The first pulleys are slidably connected to the corresponding first grooves.

[0006] The base includes a lower base frame, an upper bracket, and support rods evenly connected between the lower base frame and the upper bracket. The two ends of the support rods are respectively connected to the lower base frame and the upper bracket via vertical pivots. The angle between the support rods and the lower base frame is adjustable. The upper bracket is connected to the lower part of the end guard net assembly.

[0007] The length of the intermediate protective net assembly is between one and two times the length of the end protective net assembly.

[0008] The end guardrail assembly includes an upper connecting plate and a lower connecting plate arranged vertically. A vertical connecting plate is connected between one end of the upper connecting plate and the lower connecting plate, and a vertical rod is connected between the upper and lower opposite corners of the other end. A mesh plate is connected between the vertical rod and the vertical edge of the corresponding vertical connecting plate. The first pulley is respectively arranged at the inner end of the upper connecting plate and the lower connecting plate.

[0009] The first pulley includes an axle, with a wheel and a screw connected to each end of the axle. The screw is screwed into the upper / lower connecting plate, and the wheel slides on the two side walls of the first slide groove. By rotating the screw, the wheel presses against the bottom surface of the first slide groove, restricting the horizontal movement of the first slide groove.

[0010] A guardrail is provided on the upper part of the upper connecting plate.

[0011] The guardrail includes a first straight bar at the end where the upper connecting plate connects to the vertical connecting plate, and a second straight bar at the middle of the upper connecting plate. A square tube of the same length as the upper connecting plate is connected to the upper ends of the first straight bar and the second straight bar.

[0012] A square rod is inserted between the two square tubes, and a second sliding groove is provided on both the upper and lower sides of the square rod. A second pulley is provided on the upper and lower inner walls of the end of the square tube away from the first straight rod. The second pulley is slidably connected to the corresponding second sliding groove. The length of the square rod is the same as the length of the intermediate protective net assembly.

[0013] The intermediate protective net assembly includes a rectangular frame and a grid plate disposed in the rectangular frame. The first slide is disposed along the upper and lower edges of the rectangular frame, and pulley baffles are disposed at both ends of the first slide.

[0014] The lower base frame includes two end rods and a lower horizontal plate connected between the middle of the two end rods. The upper bracket includes an upper horizontal plate. Lower rotating bushings are evenly arranged on the upper part of the lower horizontal plate, and upper rotating bushings are evenly arranged on the lower side of the upper horizontal plate. The rotating shafts at both ends of the support rod are connected to the corresponding upper and lower rotating bushings, respectively. The rotating shafts are fastened to the upper and lower rotating bushings by nuts. All support rods rotate in the same vertical plane and are parallel.

[0015] Support rod limiting blocks are provided on the lower horizontal plate near the lower rotating shaft sleeve. The top surface of the support rod limiting block is an inclined surface. After the support rod rotates, the lower part is close to the inclined surface. The angle between the inclined surface and the support rod when it is vertical is 45°-60°.

[0016] A fixing post is provided on the lower side of the upper horizontal plate end facing the upper end of the support rod after rotation. A threaded hole is provided at the bottom of the fixing post. A positioning nut is provided on the outer wall of the support rod adjacent to the fixing post. The central axis of the positioning nut is parallel to the support rod. A positioning bolt is screwed into the positioning nut from bottom to top. When the support rod is vertical, the positioning bolt is screwed into the threaded hole.

[0017] A square sleeve is provided on the outer side of the end guard assembly opposite to its opening, and a plug hole is provided in the middle of the sleeve, with the central axis of the plug hole being vertical.

[0018] In another of the end guard components, a connecting block is provided on the outer side opposite to its opening, and a plug-in post adapted to the plug-in hole is connected to the middle of the connecting block;

[0019] Adjacent protective nets are connected together by the insertion post and the insertion hole, and the sleeve block and the connecting block fit together.

[0020] As described above, the adjustable protective net provided by this utility model includes two end protective net components and a middle protective net component inserted between them. The length of the protective net can be adjusted laterally by pulling the end protective net components. The base includes a lower frame, an upper bracket, and a support rod between them. The height of the protective net can be adjusted by adjusting the angle of the support rod. This utility model achieves adjustment of both the length and height of the protective net, offering flexible and convenient adjustment to adapt to different protection requirements. It provides stable and safe protection and is reusable. Attached Figure Description

[0021] Other objects and results of this invention will become more apparent and readily understood upon referring to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention. In the drawings:

[0022] Figure 1 This is a schematic diagram of the adjustable protective net after it has been stretched according to an embodiment of the present invention;

[0023] Figure 2 for Figure 1 Enlarged view of A in the middle;

[0024] Figure 3 This is a front view of the adjustable protective net after it has been stretched according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the adjustable protective net after it has been retracted according to an embodiment of the present invention;

[0026] Figure 5 for Figure 4 A half-section front view;

[0027] Figure 6 This is a schematic diagram of the structure of the intermediate protective net assembly according to an embodiment of the present utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the first pulley according to an embodiment of the present utility model;

[0029] Figure 8This is a schematic diagram of the structure when the support rod is vertical according to an embodiment of the present utility model;

[0030] Figure 9 This is a schematic diagram of the inclined support rod according to an embodiment of the present utility model;

[0031] Figure 10 This is a schematic diagram of the structure of adjacent adjustable protective nets connected according to an embodiment of the present invention;

[0032] Among them, 1-protective net, 11-end protective net assembly, 111-upper connecting plate, 112-lower connecting plate, 113-vertical connecting plate, 114-vertical rod, 115-mesh plate, 12-middle protective net assembly, 121-rectangular frame, 122-mesh plate, 13-first sliding groove, 14-first pulley, 141-wheel axle, 142-wheel, 143-screw;

[0033] 2-Base, 21-Lower base frame, 211-End rod, 212-Lower horizontal plate, 22-Upper bracket, 221-Upper horizontal plate, 23-Support rod, 24-Rotating shaft, 25-Lower rotating shaft sleeve, 26-Upper rotating shaft sleeve, 27-Support rod limiting block, 28-Fixing column, 29-Positioning nut, 210-Positioning bolt;

[0034] 3-Guardrail, 31-First straight bar, 32-Second straight bar, 33-Square tube, 34-Square bar, 35-Second sliding groove, 36-Second pulley;

[0035] 4-Sleeve block, 5-Insertion hole, 6-Connecting block, 7-Insertion post;

[0036] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0037] This invention can be modified in various ways and has various embodiments, with specific embodiments illustrated in the accompanying drawings. However, this invention is not limited to this specific implementation and all modifications, equivalents, and substitutions falling within the spirit and technical scope of this invention are to be understood as included.

[0038] Ordinal terms such as "first," "second," etc., may be used to describe various constituent elements, but the constituent elements are not limited to these terms. The terms are used only to distinguish one constituent element from another. For example, without departing from the scope of the claims of this utility model, a second constituent element may be named a first constituent element, and similarly, a first constituent element may be named a second constituent element. Terms and / or include combinations of multiple associated items or one of multiple associated items.

[0039] It should be understood that when referring to a constituent element being "connected" or "in contact" with other constituent elements, this includes not only cases where it is directly connected or in contact with other constituent elements, but also cases where other constituent elements exist between them. Conversely, when referring to a constituent element being "directly connected" or "directly in contact" with other constituent elements, it should be understood that no other constituent elements exist between them.

[0040] In the description of the embodiments, when it is stated that a certain component is formed "on or under" other components, "on or under" includes both two components that are in direct contact with each other and at least one other component that is configured to be formed between the two components. Furthermore, when expressed as "on or under", based on a certain component, it refers not only to the upper direction but may also include the lower direction.

[0041] The terminology used in this application is for illustrative purposes only and is not intended to limit the scope of the invention. Unless the context clearly specifies otherwise, singular expressions include plural expressions. In this application, terms such as "comprising" or "having" are used to specify the presence of features, numbers, steps, operations, constituent elements, components, or combinations thereof described in the specification, and do not preclude the presence or additional possibilities of one or more other features, numbers, steps, operations, constituent elements, components, or combinations thereof.

[0042] Unless otherwise defined, including technical or scientific terms, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. Terms as defined in commonly used dictionaries should be interpreted in a meaning consistent with their meaning in the context of the relevant art, and should not be construed as having an ideal or overly formal meaning unless explicitly defined in this application.

[0043] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0044] like Figures 1-10 As shown in the figure, the adjustable protective net proposed in this embodiment can be used for edge protection in building construction, and can also be used for protective fencing in other occasions.

[0045] This adjustable protective net includes a horizontally retractable protective net 1 and a height-adjustable base 2 located at the bottom of the protective net 1. The protective net 1 is used to enclose and protect the construction site to ensure safety. The retractable protective net 1 can be stretched to become longer, which is suitable for protection requirements of various lengths. The base 2 is used to support the protective net 1. The adjustable base 2 can be raised or lowered appropriately, which is suitable for protection requirements of various heights.

[0046] To facilitate the stretching and retraction of the protective net 1, the protective net 1 may include two flat box-shaped end net assemblies 11 arranged opposite each other. The opposite sides of the two end net assemblies 11 are both open. An intermediate net assembly 12 is inserted between the two end net assemblies 11. A first groove 13 is provided at the top and bottom of the intermediate net assembly 12. A first pulley 14 adapted to the first groove 13 is provided on the inner side of the top and bottom of the end net assembly 11. The first pulley 14 is slidably connected to the corresponding first groove 13.

[0047] The height and width of the flat-box-shaped end net assembly 11 perfectly accommodate the height and width of the intermediate net assembly 12. The two ends of the intermediate net assembly 12 are respectively inserted into the openings of the two end net assemblies 11. Together, the intermediate net assembly 12 and the two end net assemblies 11 form a stretchable protective net 1. When the open ends of the two end net assemblies 11 are aligned, the longest part of the protective net 1 is the sum of the lengths of the two end net assemblies 11. As the two end net assemblies 11 are pulled apart, the length of the protective net 1 gradually increases, reaching a maximum of the sum of the lengths of the two end net assemblies 11 and the intermediate net assembly 12, without compromising safety.

[0048] According to construction needs, pull open the end protective net assembly 11 so that the protective net 1 reaches the required length.

[0049] The two end guard net assemblies 11 can be smoothly pulled by sliding the first slide groove 13 and the first pulley 14. The end guard net assemblies 11 are provided with sliding connections at the top and bottom to ensure that the middle guard net assembly 12 is absolutely vertical and stable during the pulling process. Pulley baffles are provided at both ends of the first slide groove 13 to prevent the first pulley 14 from disengaging.

[0050] To facilitate the adjustment of the height of the base 2, the base 2 includes a lower base frame 21, an upper bracket 22, and support rods 23 evenly connected between the lower base frame 21 and the upper bracket 22. The two ends of the support rods 23 are connected and fixed to the lower base frame 21 and the upper bracket 22 respectively through vertical pivots 24. The angle between the support rods 23 and the lower base frame 21 is adjustable. The upper bracket 22 is connected to the lower part of the end guard net assembly 11.

[0051] The lower base frame 21 is placed on the ground, and several support rods 23 are supported between the upper bracket 22 and the lower base frame 21. The two ends of the support rods 23 are rotatably connected to the lower base frame 21 and the upper bracket 22 respectively. Through the rotatable connection, all the support rods 23 can gradually change from vertical to inclined at the same time. All the support rods 23 always remain parallel, and the lower base frame 21 and the upper bracket 22 always remain vertically parallel, so that the base 2 is stably supported.

[0052] When the support rod 23 is vertical, the lower base frame 21 and the upper bracket 22 are aligned vertically, and the base 2 is at its highest point. When the support rod 23 is tilted, the lower base frame 21 and the upper bracket 22 are staggered and the distance between them decreases, and the base 2 becomes shorter. The bases 2 under the two end netting assemblies 11 on a protective net 1 are adjusted synchronously to ensure the balance of the protective net 1.

[0053] The tilt angle of the support rod 23 can be adjusted as needed, and the support rod 23 can be fixed to adjust the height of the base 2.

[0054] In order for the two end guardrail assemblies 11 to be fully connected, the length of the middle guardrail assembly 12 is between one and two times the length of the end guardrail assembly 11.

[0055] In a specific embodiment of this utility model, in order to facilitate the opening of the end protective net assembly 11, the end protective net assembly 11 may include an upper connecting plate 111 and a lower connecting plate 112 arranged vertically. A vertical connecting plate 113 is connected between one end of the upper connecting plate 111 and the lower connecting plate 112, and a vertical rod 114 is connected between the upper and lower opposite corners of the other end. A net plate 115 is connected between the vertical rod 114 and the corresponding vertical side of the vertical connecting plate 113. The first pulley 14 is respectively arranged at the inner end of the upper connecting plate 111 and the lower connecting plate 112.

[0056] Both the upper connecting plate 111 and the lower connecting plate 112 are long strip-shaped plates. The upper connecting plate 111, the vertical connecting plate 113, the lower connecting plate 112, and the two vertical rods 114 form a flat U-shaped frame. Mesh plates 115 are connected to the square frames on both sides of the flat U-shaped frame to form a flat box-shaped end protective net assembly 11. The end protective net assembly 11 has two layers of mesh plates 115, providing tight protection.

[0057] A first pulley 14 is provided at the inner end of the upper connecting plate 111 and the lower connecting plate 112 to facilitate observation and maintenance of the first pulley 14.

[0058] In a specific embodiment of this utility model, in order to allow the first pulley 14 to rotate flexibly, the first pulley 14 may include a wheel axle 141, with a wheel 142 and a screw 143 respectively connected to both ends of the wheel axle 141. The screw 143 is screwed into a screw tube provided in the upper connecting plate 111 / lower connecting plate 112, and the wheel 142 slides on the two side walls of the first sliding groove 13.

[0059] The axle 141 is partially screwed into the upper connecting plate 111 / lower connecting plate 112 via the screw 143. The wheel 142 is horizontally located in the first slide groove 13. By rotating the screw 143, the lower side of the wheel 142 does not contact the bottom of the first slide groove 13. The wheel 142 slides smoothly against the side wall of the first slide groove 13, which facilitates replacement and maintenance.

[0060] By rotating the screw 143 in the opposite direction, the wheel 142 can press against the bottom surface of the first slide groove 13. The wheels of the upper connecting plate 111 and the lower connecting plate 112 press against the bottom surface of the opposite first slide groove 13, thereby restricting the horizontal movement of the first slide groove 13 and facilitating the positioning of the end guard net assembly 11 and the middle guard net assembly 12 after stretching.

[0061] In one specific embodiment of this utility model, a guardrail 3 is provided on the upper part of the upper connecting plate 111. The guardrail 3 can further protect the safety by height.

[0062] In one specific embodiment of this utility model, the guardrail 3 is configured to be stretchable. The guardrail 3 may include a first straight rod 31 located at the end where the upper connecting plate 111 connects to the vertical connecting plate 113, and a second straight rod 32 located in the middle of the upper connecting plate 111. A square tube 33 of the same length as the upper connecting plate 111 is connected to the upper ends of the first straight rod 31 and the second straight rod 32. The guardrail 3 is provided on each end guardrail assembly 11. The uppermost part of the guardrail 3 is a square tube 33, which facilitates the insertion of the middle extension rod.

[0063] The extension rod can be a square rod 34, the width of which is adapted to the inner width of the square tube 33. The square rod 34 is inserted between the square tubes 33 of the two end netting assemblies 11. A second sliding groove 35 is provided on both the upper and lower sides of the square rod 34. A second pulley 36 is provided on the upper and lower inner walls of the end of the square tube 33 away from the first straight rod 31. The second pulley 36 is slidably connected to the corresponding second sliding groove 35. The length of the square rod 34 is the same as the length of the middle netting assembly 12.

[0064] The two ends of the square rod 34 are respectively inserted into two square tubes 33. The square rod 34 and the two square tubes 33 together form a stretchable guardrail 3, which is stretched in the same way as the protective net 1. When the open ends of the two end net components 11 are aligned, the two square tubes 33 are joined together. At the very end of the guardrail 3, the two end net components 11 are pulled apart, and the length of the guardrail 3 gradually increases, reaching a maximum of the sum of the lengths of the two square tubes 33 and the square rod 34.

[0065] The two guardrails 3 can be smoothly pulled by sliding through the second groove 35 and the second pulley 36. Sliding connections are provided at both the top and bottom to ensure stable pulling. Anti-detachment baffles are provided at both ends of the second groove 35 to prevent the second pulley 36 from disengaging. The second pulley 36 has the same structure as the first pulley 14.

[0066] In one specific embodiment of the present invention, the intermediate protective net assembly 12 includes a rectangular frame 121 and a grid plate 122 disposed in the rectangular frame 121, and a first sliding groove 13 is disposed along the upper and lower edges of the rectangular frame 121.

[0067] A multi-layered grid plate 122 can be set in the rectangular frame 121 for protection and stability. The first slide groove 13 can be opened in the upper and lower borders of the rectangular frame 121. A pulley baffle is set at the end of the upper and lower borders to block the first pulley 14 from continuing to slide and prevent it from falling out of the first slide groove 13.

[0068] In one specific embodiment of this utility model, to facilitate the adjustment of the angle of the support rod 23, the lower base frame 21 may include two end rods 211 and a lower horizontal plate 212 connected between the middle parts of the two end rods 211, and the upper bracket 22 includes an upper horizontal plate 221. Lower rotating bushings 25 are evenly arranged on the upper part of the lower horizontal plate 212, and upper rotating bushings 26 are evenly arranged on the lower side of the upper horizontal plate 221. The rotating shafts 24 at both ends of the support rod 23 are respectively connected to the corresponding upper rotating bushings 26 and lower rotating bushings 25. The rotating shafts 24 are fastened to the upper rotating bushings 26 and lower rotating bushings 25 respectively by nuts. All support rods 23 rotate in the same vertical plane and are parallel.

[0069] The I-shaped lower base frame 21 can be stably placed on the ground. The upper horizontal plate 221, which has the same shape as the lower horizontal plate 212, is connected to the middle of the bottom of the end guard net assembly 11. The upper horizontal plate 221 and the lower horizontal plate 212 are always on the same vertical plane and parallel.

[0070] The lower rotating bushing 25 may have a through hole in the support block mounted on the lower horizontal plate 212, and the upper rotating bushing 26 may have a through hole in the support block mounted on the upper horizontal plate 221. The support rod 23 may be a square rod or a round rod, with a rotating shaft 24 vertically connected to both ends of the square rod or round rod. The rotating shafts 24 at both ends face the same direction and are threaded. After the rotating shaft 24 passes through the upper rotating bushing / lower rotating bushing, a nut is screwed on to prevent the rotating shaft 24 from falling off.

[0071] All support rods 23 rotate synchronously, lowering the upper horizontal plate 221 and the base 2, thus reducing the height of the protective net 1. When all support rods 23 are vertical, the upper horizontal plate 221 is at its highest point, the base 2 is at its highest point, and therefore the protective net 1 is at its highest point. After adjusting the angle of the support rods 23 according to construction needs, tightening the nuts will position the support rods 23.

[0072] In a specific embodiment of this utility model, in order to further stabilize the positioning support rod 23, a support rod limiting block 27 is provided on the lower horizontal plate 212 near each lower rotating bushing 25. The top surface of the support rod limiting block 27 is an inclined surface. After the support rod 23 rotates, the lower part is close to the inclined surface. The angle between the inclined surface and the vertical support rod 23 is greater than 45 degrees and less than 60 degrees.

[0073] A support rod limiting block 27 is provided on the side of each support rod 23. The height of the support rod limiting block 27 should not hinder the rotation of the support rod 23. The support rod limiting block 27 can be set on the side of the support rod 23 near the middle of the protective net 1 or on the side near the outer end of the protective net 1. In this embodiment, it is set on the side near the middle of the protective net 1.

[0074] The support rod 23 rotates towards the center of the protective net 1. When rotated to a suitable angle, the pivot 24 can be secured with a nut for positioning. It can rotate as low as possible to engage with the top surface of the support rod limiting block 27, where it is positioned to prevent further rotation. The support rod limiting block 27 restricts the maximum rotation angle of the support rod 23, ensuring the safety of the base 2.

[0075] In a specific embodiment of this utility model, in order to ensure stable support when the support rod 23 is vertical, a fixing post 28 is provided on the lower side of the upper horizontal plate end facing the upper end of the support rod 23 after rotation. A threaded hole is provided at the bottom of the fixing post 28, and a positioning nut 29 is provided on the outer wall of the support rod 23 adjacent to the fixing post 28. A positioning bolt 210 is screwed from bottom to top in the positioning nut 29. The support rod 23 is vertically positioned by screwing the positioning bolt 210 into the threaded hole.

[0076] The fixing post 28 is located at the end of the upper horizontal plate 221 in the rotation direction of the support rod 23. In this embodiment, it is located at the end of the upper horizontal plate 221 facing the middle of the protective net 1. The upper end of the fixing post 28 is fixed to the upper horizontal plate 221, and the fixing post 28 is close to the first support rod 23. The upper part of the first support rod 23 is connected to the outer wall of the positioning nut 29. The central axis of the positioning nut 29 is parallel to the support rod 23. When the support rod 23 is vertical, the positioning nut 29 and the fixing post 28 are close together vertically. In addition to tightening the nut on the rotating shaft 24, the positioning nut 29 can also be connected to the fixing post 28 for stable positioning.

[0077] In one specific embodiment of this utility model, in order to connect multiple adjustable protective nets 1 to form a protective enclosure, a square sleeve block 4 can be provided on the outer side of the end protective net assembly 11 opposite to its opening. A insertion hole 5 is provided in the middle of the sleeve block 4, and the central axis of the insertion hole 5 is vertical. The sleeve block 4 can be provided on the vertical connecting plate 113 of this end protective net assembly 11, and the number of sleeve blocks 4 can be two.

[0078] A connecting block 6 is provided on the outer side of the other end guardrail assembly 11 opposite to its opening. A plug-in post 7, compatible with the plug-in hole 5, is connected to the middle of the connecting block 6. The connecting block 6 can be provided on the vertical connecting plate 113 of this end guardrail assembly 11, and the number of connecting blocks 6 can be two. The connection of the two sets of plug-in holes 5 and plug-in posts 7 ensures a stable connection. The plug-in post 7 can be located on the upper side of the connecting block 6.

[0079] The adjacent protective net 1 is connected to the insertion hole 5 by the insertion post 7, and after insertion, the sleeve block 4 and the connecting block 6 fit together.

[0080] Warning signs can also be installed on both sides of the middle protective net assembly 12, and reflective coatings can be installed on both sides of the end protective net assembly 11 to increase nighttime visibility and provide timely nighttime warnings.

[0081] The adjustable protective net according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the adjustable protective net proposed by the present invention without departing from the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. An adjustable protective net, characterized in that, It includes a laterally retractable protective net and a height-adjustable base located at the lower part of the protective net, wherein, The protective net includes two flat box-shaped end net assemblies arranged opposite each other. The opposite sides of the two end net assemblies are both open. An intermediate net assembly is inserted between the two end net assemblies. The top and bottom of the intermediate net assembly are provided with first grooves. The top and bottom inner sides of the end net assemblies are provided with first pulleys that are adapted to the first grooves. The first pulleys are slidably connected to the corresponding first grooves. The base includes a lower base frame, an upper bracket, and support rods evenly connected between the lower base frame and the upper bracket. The two ends of the support rods are respectively connected to the lower base frame and the upper bracket via vertical pivots. The angle between the support rods and the lower base frame is adjustable. The upper bracket is connected to the lower part of the end guard net assembly. The length of the intermediate protective net assembly is between one and two times the length of the end protective net assembly.

2. The adjustable protective net as described in claim 1, characterized in that, The end guardrail assembly includes an upper connecting plate and a lower connecting plate arranged vertically. A vertical connecting plate is connected between one end of the upper connecting plate and the lower connecting plate, and a vertical rod is connected between the upper and lower opposite corners of the other end. A mesh plate is connected between the vertical rod and the vertical edge of the corresponding vertical connecting plate. The first pulley is respectively arranged at the inner end of the upper connecting plate and the lower connecting plate.

3. The adjustable protective net as described in claim 2, characterized in that, The first pulley includes an axle, with a wheel and a screw connected to each end of the axle. The screw is screwed into the upper / lower connecting plate, and the wheel slides on the two side walls of the first groove. By rotating the screw, the wheel presses against the bottom surface of the first slide groove, restricting the horizontal movement of the first slide groove.

4. The adjustable protective net as described in claim 2, characterized in that, A guardrail is provided on the upper part of the upper connecting plate.

5. The adjustable protective net as described in claim 4, characterized in that, The guardrail includes a first straight bar at the end where the upper connecting plate connects to the vertical connecting plate, and a second straight bar at the middle of the upper connecting plate. A square tube of the same length as the upper connecting plate is connected to the upper ends of the first straight bar and the second straight bar. A square rod is inserted between the two square tubes, and a second sliding groove is provided on both the upper and lower sides of the square rod. A second pulley is provided on the upper and lower inner walls of the end of the square tube away from the first straight rod. The second pulley is slidably connected to the corresponding second sliding groove. The length of the square rod is the same as the length of the intermediate protective net assembly.

6. The adjustable protective net as described in claim 1, characterized in that, The intermediate protective net assembly includes a rectangular frame and a grid plate disposed in the rectangular frame. The first slide is disposed along the upper and lower edges of the rectangular frame, and pulley baffles are disposed at both ends of the first slide.

7. The adjustable protective net as described in claim 1, characterized in that, The lower base frame includes two end rods and a lower horizontal plate connected between the middle of the two end rods. The upper bracket includes an upper horizontal plate. Lower rotating bushings are evenly arranged on the upper part of the lower horizontal plate, and upper rotating bushings are evenly arranged on the lower side of the upper horizontal plate. The rotating shafts at both ends of the support rod are respectively connected to the corresponding upper and lower rotating bushings. The rotating shafts are fastened to the upper and lower rotating bushings by nuts. All support rods rotate in the same vertical plane and are parallel.

8. The adjustable protective net as described in claim 7, characterized in that, Support rod limiting blocks are provided on the lower horizontal plate near the lower rotating shaft sleeve. The top surface of the support rod limiting block is an inclined surface. After the support rod rotates, the lower part is close to the inclined surface. The angle between the inclined surface and the support rod when it is vertical is 45°-60°.

9. The adjustable protective net as described in claim 7, characterized in that, A fixing post is provided on the lower side of the upper horizontal plate end facing the upper end of the support rod after rotation. A threaded hole is provided at the bottom of the fixing post. A positioning nut is provided on the outer wall of the support rod adjacent to the fixing post. The central axis of the positioning nut is parallel to the support rod. A positioning bolt is screwed from bottom to top in the positioning nut. When the support rod is vertical, the positioning bolt is screwed into the threaded hole.

10. The adjustable protective net as described in claim 1, characterized in that, A square sleeve is provided on the outer side of the end guard assembly opposite to its opening, and a plug hole is provided in the middle of the sleeve, with the central axis of the plug hole being vertical. In another of the end guard components, a connecting block is provided on the outer side opposite to its opening, and a plug-in post adapted to the plug-in hole is connected to the middle of the connecting block; Adjacent protective nets are connected together by the insertion post and the insertion hole, and the sleeve block and the connecting block fit together.

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