Safety guardrail for road and bridge construction

Abstract

The utility model discloses a road bridge construction safety guardrail which comprises two bottom plates, first supporting rods are fixedly arranged on the bottom plates, the upper ends of the first supporting rods are inserted into and slidably connected with second supporting rods, and the tops of the second supporting rods penetrate through and are rotatably connected with threaded rods. The threaded rod can be inserted into the first supporting rod and is in threaded connection with the first supporting rod, the lower portion of the first supporting rod and the upper portion of the second supporting rod are each fixedly connected with a connecting rod, and the ends, close to each other, of the two connecting rods at the same horizontal height are hinged to the two ends of the same center rod. The whole guardrail can be folded and is convenient to store; meanwhile, due to the arrangement of the limiting plates, the hinged position can be reinforced when the guardrail is unfolded, and positioning and locking of the folding state can be achieved when the guardrail is folded; and in addition, the two gears are meshed with each other during folding, so that synchronous lifting of the two second supporting rods can be quickly realized, and the height of the guardrail can be quickly adjusted.

Description

Technical Field

[0001] The utility model relates to the field of road and bridge construction, and particularly relates to a safety guardrail for road and bridge construction. Background Art

[0002] During the process of road and bridge construction, a protective fence is needed to protect the construction area, to prevent the staff from accidentally falling from the edge of the bridge, and to prevent building materials from falling from a height. However, the traditional guardrail has a relatively simple structure, unable to adjust the protection height, and unable to be folded, which is not convenient for storage. Accordingly, the utility model provides a safety guardrail for road and bridge construction to solve the above problems. Content of the Utility Model

[0003] In order to overcome the defects in the above-mentioned prior art, the utility model provides a safety guardrail for road and bridge construction. By setting the central rod and the connecting rod to be hinged, the whole guardrail can be folded, which is convenient for storage; when folding, the two gears are meshed with each other, so that the synchronous lifting of the two second support rods can be quickly realized, and thus the height adjustment of the guardrail can be quickly realized.

[0004] Technical Solution

[0005] A safety guardrail for road and bridge construction includes two bottom plates. A first support rod is fixedly arranged on the bottom plate. The upper end of the first support rod is inserted into and slidably connected with a second support rod. The top of the second support rod penetrates through and is rotatably connected with a threaded rod. The threaded rod can be inserted into and threadedly connected with the first support rod. A connecting rod is fixedly connected to the lower part of the first support rod and the upper part of the second support rod. The mutually close ends of the two connecting rods at the same horizontal height are hinged to the two ends of the same central rod. A protective net capable of stretching in the vertical direction is fixedly connected between the two connecting rods facing each other up and down.

[0006] Further, a telescopic rod is also fixedly connected between the two connecting rods facing each other up and down. A telescopic rod is also fixedly connected between the upper and lower central rods. A tension spring is arranged inside the telescopic rod.

[0007] Further, a limiting plate can be clamped on the upper central rod. A limiting part and a clamping part are fixedly arranged on the side surface of the limiting plate close to the central rod.

[0008] Further, a matching hole into which the clamping part can be inserted is penetrated through the upper surface of the upper connecting rod.

[0009] Further, a gear is fixedly arranged at the upper end of the threaded rod.

[0010] Further, a rocker is rotatably arranged on the upper side surface of the gear.

[0011] Further, the rotation directions of the two threaded rods are opposite.

[0012] Beneficial effects

[0013] Compared with the prior art, the utility model has the following beneficial effects: by arranging the central rod and the connecting rod to be hinged, the whole guardrail can be folded, which is convenient for storage; at the same time, the arrangement of the limiting plate can strengthen the hinge joint when the guardrail is unfolded, and can realize the positioning and locking of the folded state when folding; in addition, the two gears are meshed with each other during folding, so that the synchronous lifting of the two second support rods can be realized quickly, so as to quickly adjust the height of the guardrail, and the two gears can also be rotated simultaneously during unfolding for adjustment. Description of the drawings

[0014] Figure 1 is a schematic structural diagram of a safety guardrail for road and bridge construction of the utility model;

[0015] Figure 2 is Figure 1 the top view of;

[0016] Figure 3 is a schematic structural diagram of the limiting plate and the matching hole;

[0017] Figure 4 is a schematic structural diagram of the utility model when folded.

[0018] Reference numerals in the drawings

[0019] Bottom plate 1, first support rod 2, second support rod 3, threaded rod 4, gear 5, rocker 6, connecting rod 7, limiting plate 8, telescopic rod 9, tension spring 10, engaging part 11, limiting part 12, central rod 13, matching hole 14, protection net 15. Detailed implementation manners

[0020] To better illustrate and explain the content of the utility model, the following is an expansion description in combination with the drawings and implementation examples:

[0021] As Figures 1 - 4 shown, the utility model discloses a safety guardrail for road and bridge construction, which includes two bottom plates 1. A first support rod 2 is fixedly arranged on the bottom plate 1. The upper end of the first support rod 2 is inserted into and slidably connected with a second support rod 3. The top of the second support rod 3 penetrates through and is rotatably connected with a threaded rod 4. The threaded rod 4 can be inserted into and threadedly connected with the first support rod 2. Both the lower part of the first support rod 2 and the upper part of the second support rod 3 are fixedly connected with a connecting rod 7. The mutually close ends of the two connecting rods 7 at the same horizontal height are hinged to both ends of the same central rod 13. A protection net 15 that can be stretched in the vertical direction is fixedly connected between the two connecting rods 7 that are vertically opposite.

[0022] Furthermore, a telescopic rod 9 is fixedly connected between the two vertically opposite connecting rods 7, and a telescopic rod 9 is also fixedly connected between the upper and lower central rods 13. A tension spring 10 is arranged inside the telescopic rod 9.

[0023] Furthermore, a limiting plate 8 can be clamped on the upper central rod 13. A limiting portion 12 and a clamping portion 11 are fixedly arranged on one side of the limiting plate 8 close to the central rod 13.

[0024] Furthermore, a fitting hole 14 into which the clamping portion 11 can be inserted penetrates through the upper surface of the upper connecting rod 7.

[0025] Furthermore, a gear 5 is fixedly arranged at the upper end of the threaded rod 4.

[0026] Furthermore, a rocker 6 is rotatably arranged on the upper side surface of the gear 5.

[0027] Furthermore, the two threaded rods 4 have opposite helix directions.

[0028] Specifically, when folding and storing is required, the limiting plate 8 is removed, and then the connecting rod 7 and the central rod 13 are bent until the two bottom plates 1 are close to and adjacent to each other. At this time, the limiting plate 8 can be clamped into the upper two connecting rods 7. At this time, the limiting portion 12 is located between the two parallel connecting rods 7, and the clamping portions 11 are respectively located on the opposite sides of the two connecting rods 7 (as Figure 4 shown), to limit and fix the position of the connecting rod 7;

[0029] At this time, the two gears 5 are meshed with each other. At this time, the rocker 6 is rotated to drive the threaded rod 4 to rotate, so as to drive the second strut 3 to move up and down synchronously, realizing the adjustment of the height of the guardrail;

[0030] When unfolding is required, the limiting plate 8 is removed, the two protective nets 15 are unfolded, and then the limiting plate 8 is buckled on the upper side of the central rod 13. At the same time, the clamping portion 11 is inserted into the fitting hole 14 and the limiting portion 12 is close to the central rod 13, to rigidly reinforce the hinged position of the connecting rod 7 and the central rod 13.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the technical solutions of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of each embodiment of the present invention.

Claims

1. A safety guardrail for road and bridge construction, characterized in that: It includes two bottom plates (1), on which a first support rod (2) is fixedly arranged. The upper end of the first support rod (2) is inserted into and slidably connected with a second support rod (3). The top of the second support rod (3) penetrates through and is rotatably connected with a threaded rod (4), and the threaded rod (4) can be inserted into and threadedly connected with the first support rod (2). A connecting rod (7) is fixedly connected to the lower part of the first support rod (2) and the upper part of the second support rod (3). The mutually approaching ends of two connecting rods (7) at the same horizontal height are hinged to both ends of the same central rod (13). A protective net (15) that can be stretched in the vertical direction is fixedly connected between two vertically opposite connecting rods (7).

2. The safety guardrail for road and bridge construction according to claim 1, characterized in that: A telescopic rod (9) is also fixedly connected between two vertically opposite connecting rods (7), and a telescopic rod (9) is also fixedly connected between the upper and lower central rods (13). A tension spring (10) is arranged inside the telescopic rod (9).

3. The safety guardrail for road and bridge construction according to claim 2, characterized in that: A limiting plate (8) can be clamped on the upper central rod (13), and a limiting part (12) and a clamping part (11) are fixedly arranged on the side surface of the limiting plate (8) close to the central rod (13).

4. The safety guardrail for road and bridge construction according to claim 3, wherein: A matching hole (14) that can be inserted by the clamping part (11) penetrates through the upper surface of the upper connecting rod (7).

5. The safety guardrail for road and bridge construction according to claim 4, characterized in that: A gear (5) is fixedly arranged at the upper end of the threaded rod (4).

6. The safety guardrail for road and bridge construction according to claim 5, wherein: A rocker (6) is rotatably arranged on the upper side surface of the gear (5).

7. The safety guardrail for road and bridge construction according to claim 6, characterized in that: The thread directions of the two threaded rods (4) are opposite.

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