Anti-throwing net with telescopic function

Abstract

The application provides a throw-protection net with telescopic function, which comprises a throw-protection net piece, both sides of the throw-protection net piece are provided with vertical rods, both sides of the throw-protection net piece are slidably connected with the two vertical rods, a plurality of temporary fixing members are arranged on the two vertical rods and used for temporarily fixing the throw-protection net piece, and the two vertical rods are fixedly connected with guardrails on both sides of a telescopic joint. The application can reduce the deformation of the throw-protection net along with the expansion and contraction of the bridge structure to the greatest extent, reduce the maintenance cost of the throw-protection net, reduce the possibility that the damaged component causes injury to people or objects, and improve the safety.

Description

TECHNICAL FIELD

[0001] The present application relates to a fall protection net, in particular to a fall protection net with telescopic function. BACKGROUND

[0002] The bridge fall protection net is a protective device installed above the bridge, mainly used to prevent objects falling from above the bridge from causing harm to vehicles and pedestrians below.

[0003] The setting position of the fall protection net mostly crosses the expansion joint of the bridge, and the mutual connection of the fall protection nets generally adopts fixed bolt connection, which often causes large deformation of the fall protection net structure and even damage when the bridge body structure deforms and expands, affecting the actual protection function and damaging the appearance of the facility. SUMMARY

[0004] In view of the above prior art, the present application provides a fall protection net with telescopic function.

[0005] The fall protection net with telescopic function and the installation and debugging method thereof provided by the present application comprise a fall protection net piece, both sides of the fall protection net piece are provided with vertical rods, both side portions of the fall protection net piece are slidably connected with the two vertical rods, a plurality of temporary fixing members are arranged on the two vertical rods and used for temporarily fixing the fall protection net piece, and the two vertical rods are fixedly connected with guardrails on both sides of the expansion joint.

[0006] Preferably, the fall protection net piece comprises a steel mesh, and a frame is arranged around the steel mesh and connected with the steel mesh through connecting bolts.

[0007] Preferably, opposite side portions of the two vertical rods are provided with grooves, the bottoms of the two grooves are provided with L-shaped supporting limiting plates, both side bottoms of the fall protection net piece are provided with a plurality of pulleys, and both side portions of the fall protection net piece are inserted into the grooves of the two vertical rods, and the pulleys are slidably connected with the top surfaces of the L-shaped supporting limiting plates.

[0008] Preferably, springs are arranged between the side walls of the fall protection net piece and the inner walls of the grooves.

[0009] Preferably, a plurality of groups of anti-rolling limiting plates are arranged on the two vertical rods, the anti-rolling limiting plates comprise two oppositely arranged anti-rolling limiting plate units, and the two anti-rolling limiting plate units are arranged on the front side and the rear side of the fall protection net piece, respectively.

[0010] Preferably, the temporary fixing member is a U-shaped positioning bolt, the front and rear walls of the two vertical rods are each provided with a positioning lug, the opposite side walls of the two vertical rods are each provided with a positioning groove, the closed end of the U-shaped positioning bolt penetrates the anti-throwing net, the two sides of the free end of the U-shaped positioning bolt pass through the two positioning lugs respectively, and the U-shaped positioning bolt is fixed through a positioning nut, and a part of the closed end of the U-shaped positioning bolt is arranged in the positioning groove.

[0011] Preferably, the bottom of the vertical rod is provided with a base, and the base is fixedly connected with the guardrail through an expansion bolt.

[0012] Preferably, the two vertical rods are each provided with a scale.

[0013] Preferably, the two sides of the bottom of the anti-throwing net are each provided with a mounting plate, the two sides of the bottom of the mounting plate are each provided with a fixed plate, and the two fixed plates are arranged with the pulley through a bearing.

[0014] Compared with the prior art, the anti-throwing net has the advantages that the anti-throwing net is provided with a H-shaped clamping groove for lateral limiting, a pulley is arranged at the bottom, the stability of the connection is ensured, and the expansion and contraction of the connection part is ensured; when the bridge structure is heated and contracted, stress concentration is reduced, deformation is no longer directly applied to the anti-throwing net itself, but is converted into expansion and contraction displacement through the pulley, the deformation of the anti-throwing net caused by the expansion and contraction of the bridge structure is reduced to the greatest extent, the maintenance cost of the anti-throwing net is reduced, the possibility of damage to people or objects caused by damaged components is reduced, and safety is improved. The installation process adopts a U-shaped positioning bolt for temporary fixing, and a expansion and contraction scale is arranged, corresponding expansion and contraction preset values are set according to different installation environment temperatures, installation data is ensured to be accurate, and operation errors are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a structural schematic view of an embodiment of the present application;

[0016] Figures 2-7 FIG. 2 is a partial structural schematic view of an embodiment of the present application.

[0017] In the figure, 1 is a reinforcement net, 2 is a frame, 3 is a connecting bolt, 4 is a vertical rod, 5 is a groove, 6 is an L-shaped bearing limiting plate, 7 is a mounting plate, 8 is a fixed plate, 9 is a pulley, 10 is a spring, 11 is an anti-tilting limiting plate, 12 is a U-shaped positioning bolt, 13 is a positioning lug, 14 is a positioning groove, 15 is a positioning nut, 16 is a base, 17 is an expansion bolt, 18 is a expansion joint, 19 is a guardrail, and 20 is a scale. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific drawings. Embodiment

[0019] A throw-proof net with telescopic function, as shown in Figure 1 , 2 , comprises a throw-proof net sheet, the throw-proof net sheet comprises a reinforcing mesh 1, the periphery of the reinforcing mesh 1 is provided with a frame 2, and the frame 2 is connected with the reinforcing mesh 1 through connecting bolts 3.

[0020] As shown in Figure 1 , 3 , 4, both sides of the throw-proof net sheet are provided with vertical rods 4, and both sides of the throw-proof net sheet are slidably connected with the two vertical rods 4. Specifically, the two vertical rods 4 are made of I-shaped steel, the side of each vertical rod 4 has a groove 5, the bottom of each groove 5 is provided with an L-shaped supporting limiting plate 6, the L-shaped supporting limiting plate 6 is made of a 12mm-thick Q235 steel plate, the L-shaped supporting limiting plate 6 is slidably inserted into the bottom of the groove 5 and is fastened through bolts, and the side plate of the L-shaped supporting limiting plate 6 is located on the side close to the throw-proof net sheet. The bottom of each side of the throw-proof net sheet is fixedly provided with a mounting plate 7, the bottom of each side of the mounting plate 7 is provided with a fixed plate 8, two pulleys 9 are rotatably arranged between the two fixed plates 8, and the mounting plate 7 and the fixed plate 8 are made of stainless steel. The two sides of the throw-proof net sheet are respectively embedded in the grooves 5 of the two vertical rods 4, the two pulleys 9 are arranged on the top surface of the L-shaped supporting limiting plate 6 and are slidably connected with the top surface of the L-shaped supporting limiting plate 6, and the side plate of the L-shaped supporting limiting plate 6 can prevent the pulleys 9 from slipping off and can also adjust the telescopic amount of the throw-proof net sheet.

[0021] Through the above structure, the telescopic function of the throw-proof net can be realized by the sliding of the double pulleys 9. Except for the double pulleys 9, all the steel members are subjected to hot galvanizing treatment, and the thickness of the galvanizing layer is greater than 15um.

[0022] Further, as shown in Figure 3 , a spring 10 is arranged between the side wall of the throw-proof net sheet and the inner wall of the groove 5, and the spring 10 is fixed on the inner wall of the groove 5 to generate a certain damping effect so as to limit the excessive free movement of the throw-proof net sheet.

[0023] Further, as shown in Figure 1 , three groups of anti-tilting limiting plates 11 are fixed on the two vertical rods 4 along the height direction, the anti-tilting limiting plate 11 comprises two oppositely arranged anti-tilting limiting plate units, and the two anti-tilting limiting plate units are respectively arranged on the front side and the rear side of the throw-proof net sheet to prevent the throw-proof net sheet from falling off due to excessive telescoping and to avoid accidents.

[0024] Further, as shown in Figure 1 , 5As shown in Figure -7, each of the uprights 4 has a temporary fixing component at the top and bottom for temporary fixation to the anti-throw netting. Specifically, the temporary fixing component is a U-shaped positioning bolt 12 with a continuous thread. Positioning ear plates 13 are provided on the front and rear walls of both uprights 4, and positioning grooves 14 are provided on the side walls of both grooves 5. The positioning ear plates 13 and positioning grooves 14 are located on the same horizontal plane. The closed end of the U-shaped positioning bolt 12 passes through the anti-throw netting, and the two sides of the free end of the U-shaped positioning bolt 12 pass through the two positioning ear plates 13 respectively and are fixed by positioning nuts 15. A portion of the closed end of the U-shaped positioning bolt 12 is placed in the positioning groove 14. The positioning ear plates 13, positioning grooves 14, and U-shaped positioning bolts 12, together with the positioning nuts 15, can temporarily fix the uprights 4 to the anti-throw netting. Temporary fixation is an essential debugging measure before installation of this invention.

[0025] Furthermore, such as Figure 1 As shown, both uprights 4 are equipped with bases 16 at their bottoms. The bases 16 are made of 12mm thick Q235 steel plates and are fixedly connected to the guardrails 19 on both sides of the expansion joint 18 by expansion bolts 17.

[0026] Furthermore, such as Figure 1 As shown, scales 20 are provided on the flange plates of both uprights 4.

[0027] The installation and debugging method of the telescopic anti-throw net includes the following steps:

[0028] S1. Based on the bridge design drawings, confirm the expansion and contraction of the expansion joints that the anti-throw net needs to cross;

[0029] S2. Insert the left and right sides of the anti-throw netting into the grooves 5 of the two uprights 4 respectively, ensuring that all U-shaped positioning bolts 12 are inserted into the holes of the corresponding positioning ear plates 13, and that the closed end of the U-shaped positioning bolts 12 is in the positioning groove 14. Use positioning nuts 15 for initial locking.

[0030] S3. Adjust the telescopic amount. Specifically, adjust the net distance between the outer wall of the anti-throw net and the inner wall of the groove 5 by rotating the positioning nut 15. The number on the scale 20 indicates the preset telescopic amount. The preset telescopic amount is determined according to the ambient temperature. The following values ​​are preferred for installation: 60mm at 10℃, 45mm at 20℃, and 30mm at 30℃. For other temperatures not specified, the corresponding preset telescopic amount is calculated by interpolation. The scale data on both sides of the anti-throw net are set to the same value.

[0031] S4, after the preset value of the telescopic amount is adjusted, check whether the positioning nut 15 is fastened one by one, adjust the L-shaped supporting limiting plate 6, the moving distance of the pulley 9 is limited by the side plate of the L-shaped supporting limiting plate 6, and the preset value of the telescopic amount corresponds to this time, the vertical rod 4 and the temporary whole of the anti-throwing net piece are formed, according to the adjusted overall size, the position of the expansion bolt 17 is lofted on the bridge guardrail 19, and the expansion bolt 17 is punched in the guardrail 19, the nut is combined with the expansion bolt 17, and the base 16 is fixed on the bridge guardrail 19;

[0032] S5, the U-shaped positioning bolt 12 is cut off and removed by using a grinding wheel cutting machine, the temporary fixing between the anti-throwing net piece and the vertical rod 4 is unlocked, and whether the anti-throwing net piece can be freely displaced is checked, and thus the installation is completed.

[0033] The present application solves the problem of deformation and falling off of the anti-throwing net caused by the telescopic displacement of the bridge after the anti-throwing net is installed across the expansion joint. The anti-throwing net piece of the present application uses a I-shaped clamping groove for side limiting, and a pulley 9 is installed at the bottom, which not only ensures the stability of the connection, but also ensures the telescopic freedom of the connection; when the bridge structure is heated and cooled, the stress concentration is reduced, and the deformation is no longer directly applied to the anti-throwing net itself, but is converted into telescopic displacement through the pulley 9, which maximizes the reduction of the deformation of the anti-throwing net with the telescopic displacement of the bridge structure, reduces the maintenance cost of the anti-throwing net, reduces the possibility of damage to people or objects caused by damaged components, and improves the safety. The installation process uses a U-shaped positioning bolt 12 for temporary fixing, and a telescopic amount scale is configured, corresponding telescopic amount preset values are set according to different installation environment temperatures, the installation data is ensured to be accurate, and the operation error is reduced.

[0034] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure, direct or indirect application in other related technical fields, is also within the patent protection range of the present application.

Claims

1. A throw-protection net with a telescoping function, characterized in that, The utility model provides an anti -throwing net piece, two sides of the anti -throwing net piece are equipped with vertical rod, both sides of the anti -throwing net piece are slidably connected with two vertical rods, a plurality of temporary fixing pieces are equipped on two vertical rods and are used for temporarily fixing with the anti -throwing net piece, two vertical rods are fixedly connected with guardrails on both sides of expansion joint respectively, the opposite sides of two vertical rods are equipped with recess, the bottom of two recesses is equipped with L-shaped bearing limiting plate, the bottom of both sides of the anti -throwing net piece is equipped with a plurality of pulleys, both sides of the anti -throwing net piece are inserted into the recess of two vertical rods respectively, and the pulley is slidably connected with the top surface of L-shaped bearing limiting plate, a plurality of groups of anti -roll limiting plates are equipped on two vertical rods, the anti -roll limiting plate includes two opposite anti -roll limiting plate units, and two anti -roll limiting plate units are placed on the front side and rear side of the anti -throwing net piece respectively, the temporary fixing piece is U-shaped positioning peg, positioning lug is arranged on the front wall and rear wall of two vertical rods, positioning groove is arranged on the side wall of the opposite side of two vertical rods, the closed end of U-shaped positioning peg penetrates the anti -throwing net piece, the free end of U-shaped positioning peg passes two positioning lug respectively and is fixed through the positioning nut, and a part of the closed end of U-shaped positioning peg is placed in the positioning groove.

2. The stretchable anti-throw screen of claim 1, wherein, The anti -throwing net piece includes reinforcing mesh, the periphery of the reinforcing mesh is equipped with frame, and the frame is connected with the reinforcing mesh through connecting bolt.

3. The stretchable anti -throw screen according to claim 1, wherein, The spring is arranged between the side wall of the anti -throwing net piece and the inner wall of the recess.

4. The stretchable anti-throw screen according to claim 1 or 2, wherein The bottom of the vertical rod is equipped with base, and the base is fixedly connected with the guardrail through expansion bolt.

5. The stretchable anti-throw screen according to claim 1 or 2, wherein Two vertical rods are equipped with scale.

6. The stretchable anti -throw screen according to claim 1, wherein, The bottom of both sides of the anti -throwing net piece is equipped with mounting plate, the bottom of both sides of the mounting plate is equipped with fixed plate, and the pulley is installed between two fixed plates through bearing.

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