Temporary handrail for steel structure bridge installation

Abstract

The utility model discloses a temporary handrail for mounting a steel structure bridge. Shear nails are welded on the steel structure bridge in an array manner; the temporary handrail is composed of a vertical rod and a transverse rod, a bottom plate is arranged at the lower end of the vertical rod, and two sets of fixing mechanisms are arranged on the bottom plate; the fixing mechanism comprises a wedge block, a screw rod screwed on the bottom plate, and an inclined surface and a through hole which are arranged on the bottom plate; the through hole is used for sleeving a shear nail; the wedge block is provided with an open slot for inserting a rod part of the shear nail; the wedge block is matched with the inclined face, and during fixing, under the jacking of the screw rod, the wedge block upwards jacks and presses the nail cap of the shear nail. The temporary handrail is light in weight and can be repeatedly used; the temporary handrail adopts a split structure and is convenient to assemble and transport; the temporary handrail does not need to be welded, and is high in fixing strength, high in safety and easy to disassemble and assemble quickly.

Description

Technical Field

[0001] The utility model relates to the field of steel structure bridges, in particular to a temporary handrail for installing a steel structure bridge. Background Art

[0002] The installation of steel structure bridges includes steps such as hoisting box girders, paving roads, installing railings, street lights, etc. Since prefabricated steel box girders do not have railings, construction workers are at risk of falling from the steel box girders.

[0003] As attached Figure 1 As shown, the existing measure is to weld temporary railings on the steel box girder. The disadvantage is that the support of the vertical pole needs to be welded on the pavement surface of the steel box girder, and there are no less than four welding points. When dismantling, not only the workload of cutting the welding points is increased, but also the support will be damaged, which is not conducive to the reuse of the temporary railings. However, shear nails are welded in an array on the pavement surface of the steel box girder. The function of the shear nails is to increase the bonding strength between the asphalt pavement layer and the steel box girder. Therefore, shear nails can be used to fix the temporary railings to achieve welding-free installation of the temporary railings. Utility Model Content

[0004] In order to overcome the shortcomings of the background technology, the utility model discloses a temporary railing for installing a steel structure bridge, and the temporary railing adopts the following technical solution:

[0005] A temporary railing for installing a steel structure bridge, with shear nails welded in an array on the steel structure bridge; the temporary railing is composed of a vertical pole and a horizontal pole, a bottom plate is provided at the lower end of the vertical pole, and two sets of fixing mechanisms are provided on the bottom plate; the fixing mechanism includes a wedge block, a screw rod screwed on the bottom plate, and an inclined surface and a through hole provided on the bottom plate; the through hole is used to insert the shear nail, and the wedge block has an open groove for inserting the shear nail rod; the wedge block cooperates with the inclined surface, and when fixing, the wedge block presses the nail cap of the shear nail upward under the jacking of the screw rod.

[0006] To further improve the technical solution, the through hole is composed of a connected large hole and a long groove, the diameter of the large hole is larger than the nail cap of the shear nail, the diameter of the long groove is larger than the diameter of the shear nail rod and smaller than the diameter of the nail cap of the shear nail.

[0007] To further improve the technical solution, the slope of the wedge is equal to the slope of the inclined plane.

[0008] To further improve the technical solution, the cross bar is a frame-shaped cross bar, and the frame-shaped cross bar is connected to the vertical poles by bolts.

[0009] To further improve the technical solution, a through hole is provided on the vertical pole, and the through hole is used to insert the cross bar; the cross bar is a rigid rod, or a flexible rope.

[0010] To further improve the technical solution, the flexible rope is a nylon rope or a steel wire rope.

[0011] After implementing the above technical solution, compared with the background technology, the temporary railing has the following beneficial effects:

[0012] 1. Save materials, light weight and reusable;

[0013] 2. The split structure is adopted, which is convenient for assembly and transportation;

[0014] 3. No welding required, strong fixing strength, high safety, easy and quick disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 Shown is a schematic diagram of the structure of an existing temporary railing.

[0016] Attached Figure 2 What is shown is the overall structural schematic diagram of the upright pole.

[0017] Attached Figure 3 Shown is a schematic structural diagram of a fixing mechanism.

[0018] Attached Figure 4 What is shown is a schematic diagram of the structure of the temporary railing in Example 1.

[0019] Attached Figure 5 What is shown is the structural schematic diagram of the temporary railing in Example 2.

[0020] Attached photos

[0021] 1. Pole erection;

[0022] 11. Rod body; 12. Bottom plate; 13. Screw; 14. Through hole; 15. Inclined surface; 16. Wedge; 17. Perforation; 18. Connecting plate;

[0023] 2. Horizontal bar;

[0024] 3. Steel box girder;

[0025] 4. Shear nails. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. It should be noted that in the description of the present invention, the terms "front", "rear", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Embodiment 1:

[0027] A temporary railing for installing a steel structure bridge, consisting of a vertical pole and a horizontal pole, is used to prevent construction workers from falling from the steel structure box girder and causing casualties. Shear nails are welded in an array on the steel structure bridge. The function of the shear nails is to increase the bonding strength between the asphalt pavement layer and the steel structure box girder. The distance between the shear nails is roughly equal, so the shear nails can be used to fix the temporary railing to achieve the non-welding installation of the temporary railing.

[0028] Refer to the attached Figure 2 The main body of the vertical pole 1 is a pole body 11, and the pole body 11 is made of a square steel tube. A bottom plate 12 is provided at the lower end of the pole body 11, and two sets of fixing mechanisms are provided on the bottom plate 12. The fixing mechanisms are used to fix the vertical pole 1 on the pavement surface of the steel box girder 3 with the help of shear nails 4.

[0029] Refer to the attached Figure 3 The fixing mechanism includes a wedge block 16 , a screw rod 13 screwed to the bottom plate 12 , and an inclined surface 15 and a through hole 14 provided on the bottom plate 12 .

[0030] The through hole 14 is used to insert the shear nail 4. In this embodiment, the through hole 14 is composed of a large hole and a long slot connected to each other, wherein the diameter of the large hole is larger than the nail cap of the shear nail 4, and the diameter of the long slot is larger than the diameter of the rod of the shear nail 4 and smaller than the diameter of the nail cap of the shear nail 4. The purpose of this design is that the large hole facilitates the insertion of the shear nail 4, and after the rod of the shear nail 4 enters the long slot, the long slot will limit the movement of the bottom plate 12.

[0031] The wedge block 16 has an open slot for inserting the rod of the shear nail 4. The wedge block 16 cooperates with the inclined surface 15. In this embodiment, the inclination of the wedge block 16 is equal to the inclination of the inclined surface 15 of the bottom plate 12, so that the wedge block 16 can rise horizontally along the inclined surface 15.

[0032] When fixing, under the jacking of the screw rod 13, the wedge block 16 presses the nail cap of the shear nail 4 upward to fix the vertical pole 1 on the paving surface of the steel box girder 3. Since the wedge surface can generate a large jacking pressure, the fixing strength of the vertical pole 1 on the steel box girder 3 can be improved to ensure construction safety.

[0033] Refer to the attached Figure 4 Two through holes 17 are provided on the rod body 11, and the through holes 17 are used to penetrate the cross bar 2. After the vertical rod 1 is fixed, the cross bar 2 is penetrated into the through holes 17.

[0034] The crossbar 2 can be made of a rigid rod, such as a round steel tube or other profiles. The crossbar 2 can also be made of a flexible rope, such as a nylon rope, a steel wire rope, etc. Compared with a rigid rod, a flexible rope is light in weight, easy to install, and easy to carry and transport. Embodiment 2:

[0035] Refer to the attached Figure 5 In this embodiment, the crossbar 2 is a frame-shaped crossbar 2 welded from profiles, a connecting plate 18 is welded on the vertical pole 1 and the frame-shaped crossbar 2, and the frame-shaped crossbar 2 is connected to the vertical pole 1 through the connecting plate 18 and bolts. Obviously, this modular split design facilitates the assembly and transportation of temporary railings.

[0036] It can be seen from the above embodiments that the temporary railing can at least produce the following beneficial effects:

[0037] 1. Save materials, light weight and reusable;

[0038] 2. The split structure is adopted, which is convenient for assembly and transportation;

[0039] 3. No welding required, strong fixing strength, high safety, easy and quick disassembly and assembly.

[0040] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the protection scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A temporary railing for installing a steel structure bridge, wherein shear nails are welded in an array on the steel structure bridge, and the characteristics are: The temporary railing is composed of vertical poles and horizontal poles, and a bottom plate is provided at the lower end of the vertical pole, and two sets of fixing mechanisms are arranged on the bottom plate; the fixing mechanism includes a wedge block, a screw rod screwed on the bottom plate, and an inclined surface and a through hole provided on the bottom plate; the through hole is used to insert the shear nail, and the wedge block has an open groove for inserting the rod part of the shear nail; the wedge block cooperates with the inclined surface, and when fixed, under the advancement of the screw rod, the wedge block presses the nail cap of the shear nail upward.

2. A temporary guardrail for installing a steel structure bridge as claimed in claim 1, characterized in that: The through hole is composed of a connected large hole and a long slot, the diameter of the large hole is larger than the nail cap of the shear nail, the diameter of the long slot is larger than the diameter of the shear nail rod and smaller than the diameter of the nail cap of the shear nail.

3. A temporary guardrail for installing a steel structure bridge as claimed in claim 1, characterized in that: The slope of the wedge is equal to the slope of the inclined plane.

4. A temporary guardrail for installing a steel structure bridge as claimed in claim 1, characterized in that: The cross bar is a frame-shaped cross bar, and the frame-shaped cross bar is connected to the vertical bar by bolts.

5. The temporary guardrail for installing a steel structure bridge as claimed in claim 1 is characterized by: The vertical pole is provided with a through hole for inserting a cross bar; the cross bar is a rigid pole or a flexible rope.

6. A temporary guardrail for installing a steel structure bridge as claimed in claim 5, characterized in that: The flexible rope is a nylon rope or a steel wire rope.

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