Turnover supporting guardrail at command platform of bridge girder erection machine

Abstract

The utility model discloses a turnover supporting guardrail at a command platform of a bridge girder erection machine, and belongs to the technical field of road and bridge construction auxiliary devices. The device comprises a cross arm located in the middle of a second column of the bridge girder erection machine. A plurality of limiting clamping plates are arranged on the front side of the upper top surface of the cross arm; a vertical rod is rotatably mounted on the limiting clamping plate; a plurality of transverse rods are arranged between the vertical rods; a positioning support rod is also arranged on the vertical rod; one end of the positioning supporting rod is connected to a limiting clamping piece on the cross arm; the protective device effectively solves the problem that the cross arm of the second column of the bridge girder erection machine is lack of protective equipment which does not influence the operation of the bridge girder erection machine at present.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary devices for road and bridge construction, specifically to a flip-up support guardrail at the command platform of a bridge erecting machine. Background Technology

[0002] When the bridge erecting machine is in operation, it requires observation and command by staff. Currently, the most ideal observation positions, besides the top of the traditional No. 2 column of the bridge erecting machine, are the crossbeams in the middle of the No. 2 column. The top of the No. 2 column has a complete protective railing structure, but the crossbeam in the middle has no protective measures. The top surface of the crossbeam is about three meters above the beam below, and a ladder can be directly installed on the No. 2 column for climbing. However, since the crossbeam is about two meters wide, there is a lack of effective protection measures for staff when moving on it. Moreover, when the bridge erecting machine is working, the precast box girder will pass over the crossbeam. If a fixed protective railing is installed, it will cause interference. How to provide a protective device on the crossbeam of the No. 2 column that does not affect the operation of the bridge erecting machine is the main problem currently faced. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a flip-up support guardrail at the command platform of a bridge erecting machine, so as to solve the problem that there is currently no protective equipment on the crossarm of the No. 2 column of the bridge erecting machine that does not affect the operation of the bridge erecting machine.

[0004] To solve the above problems, this utility model provides the following technical solution:

[0005] A flip-up support guardrail for the command platform of a bridge erecting machine; it includes a crossbeam located in the middle of the second column of the bridge erecting machine; several limiting plates are provided on the front side of the top surface of the crossbeam; uprights are rotatably installed on the limiting plates; several crossbars are provided between the uprights; positioning supports are also provided on the uprights; one end of the positioning support is connected to the limiting plates on the crossbeam.

[0006] Preferably, the crossarm is divided into left and right sections; flange plates are provided on opposite ends of the crossarm; the two sections of the crossarm are connected by several bolts on the flange plates; several reinforcing ribs are also provided between the flange plates and the outer end faces of the crossarm; these reinforcing ribs are the limiting fasteners.

[0007] Furthermore, there are two sets of limit plates, and the two sets of limit plates are respectively set on both sides of the flange plate; the two sets of limit plates and their corresponding uprights, positioning supports and limit clips are all independent of each other.

[0008] Preferably, an ear plate is installed on the second column at the position on the left side of the front end face of the crossarm; a protective net is installed between the ear plate and the adjacent upright.

[0009] Preferably, the limiting plate is a U-shaped channel steel structure; the axis of the limiting plate is set perpendicular to the top surface of the crossbeam, and the back end face of the limiting plate is set close to the front side of the crossbeam; a pair of positioning holes are opened at the lower middle position of the two side walls of the limiting plate; one end of the upright is rotatably installed in the groove in the middle of the limiting plate by a pin.

[0010] Preferably, one end of the positioning support rod is rotatably mounted at a position slightly below the middle of the upright via a ball joint.

[0011] Preferably, the guardrail structure is formed by splicing the uprights and crossbars into a grid pattern, and the maximum height of the grid holes does not exceed 500mm.

[0012] The beneficial effects of this utility model are reflected in the following aspects:

[0013] 1. This utility model achieves the overall flipping function of the guardrail through the hinged structure of the upright and the limiting plate. During bridge erection machine operation, the guardrail can be flipped downwards for storage, avoiding the risk of interference between the guardrail and the precast box girder; while when workers stand on the crossbeam to observe the work, it can be erected to form a protective barrier, balancing safety protection and equipment operation needs.

[0014] 2. The positioning support rods and limiting clips form a stable support, and the U-shaped limiting clip plate constrains the uprights, so that the guardrail is effectively supported when it is erected, improving the pressure bearing effect and the anti-overturning ability of the device.

[0015] 3. Protect areas where it is inconvenient to install poles are protected by using protective netting located on the sides;

[0016] 4. During operation, a single person can switch between protective modes in a short time, improving the efficiency of equipment use; the operation is simple and the protection is reliable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention in an embodiment;

[0018] Figure 2 This is a schematic diagram of the limiting plate in this embodiment;

[0019] Explanation of reference numerals in the attached diagram: 1. Crossbeam, 2. Limiting plate, 3. Upright pole, 4. Positioning support rod, 5. Limiting clip, 6. Flange plate, 7. Ear plate, 8. Protective net, 9. Horizontal bar. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0021] Example:

[0022] Reference Figure 1This embodiment provides a tilting support guardrail for the command platform of a bridge erecting machine. It includes a crossbeam 1 located in the middle of the second column of the bridge erecting machine; several limiting plates 2 are provided on the front side of the top surface of the crossbeam 1; uprights 3 are rotatably mounted on the limiting plates 2; several crossbars 9 are provided between the uprights 3; positioning supports 4 are also provided on the uprights 3; one end of the positioning support 4 is connected to a limiting clip 5 on the crossbeam 1. In this embodiment, warning signs, such as reflective strips or fluorescent coatings, are provided at the top of the uprights 3 and crossbars 9 to improve visibility at night or in low-light conditions.

[0023] The crossarm 1 is divided into left and right sections; a flange plate 6 is provided on the opposite end of the crossarm 1; the two sections of the crossarm 1 are connected by several bolts on the flange plate 6; several reinforcing ribs are also provided between the flange plate 6 and the outer end face of the crossarm 1; the reinforcing ribs are the limiting clips 5.

[0024] There are two sets of limiting plates 2, and the two sets of limiting plates 2 are respectively set on both sides of the flange plate 6; the two sets of limiting plates 2 and their corresponding uprights 3, positioning supports 4 and limiting clips 5 are all independent of each other. In this embodiment, there are 3 limiting plates in a single set, and each set of limiting plates 2 and uprights 3 forms an independent flipping unit, which can be selected to unfold the guardrail on one or both sides according to the actual operation requirements, improving the flexibility of use.

[0025] An ear plate 7 is installed on the second post at the left side of the front end face of the crossarm 1; a protective net 8 is installed between the ear plate 7 and the adjacent upright 3. In this embodiment, a ladder for climbing to the top of the second post is provided on the right side of the rear end face of the crossarm 1. The protective net can provide a larger protective area, and when the upright is rotated to be in contact with the top of the crossarm, the protective net can also be attached to the surface of the crossarm without interfering with the inclined part on its side.

[0026] The limiting plate 2 is a U-shaped channel steel structure. The axis of the limiting plate 2 is perpendicular to the top surface of the crossarm 1, and the back end face of the limiting plate 2 is positioned near the front side of the crossarm 1. A pair of positioning holes are located in the lower middle part of the two side walls of the limiting plate 2. One end of the upright 3 is rotatably mounted in the groove in the middle of the limiting plate 2 via a pin. A cotter pin is provided at the end of the pin to prevent the upright 3 from accidentally coming out during rotation. It is conceivable that bolts or other connecting structures could be used instead of the pin, depending on the need.

[0027] One end of the positioning support rod 4 is rotatably mounted on the lower middle part of the upright rod 3 via a ball joint. The ball joint is used because there is a certain distance between the reinforcing rib plate and the adjacent upright rod, and the ball joint allows the positioning support rod to be positioned at the angle between the reinforcing rib plate and the flange plate.

[0028] The uprights 3 and the crossbars 9 are spliced ​​together to form a grid-like guardrail structure, and the maximum height of the grid holes does not exceed 500mm.

[0029] In actual operation, the staff only needs to unlock the positioning support rod 4 from the limit clip 5 to push the upright rod 3 downward to the side of the crossbeam 1. The whole process does not require the assistance of tools, and a single person can efficiently complete the state switch.

Claims

1. A turnover support barrier at the command platform of a bridge girder erection machine, comprising a cross arm (1) located at the middle position of the No. 2 column of the bridge girder erection machine; characterized in that: Several limiting plates (2) are provided on the front side of the top surface of the crossarm (1); uprights (3) are rotatably installed on the limiting plates (2); several crossbars (9) are provided between the uprights (3); positioning supports (4) are also provided on the uprights (3); one end of the positioning supports (4) is connected to the limiting clips (5) on the crossarm (1).

2. A turn-around support barrier at a command platform of a bridge-launching machine according to claim 1, characterized in that: The crossarm (1) is divided into left and right sections; a flange plate (6) is provided on the opposite end of the crossarm (1); the two crossarms (1) are connected by several bolts on the flange plate (6); several reinforcing ribs are also provided between the flange plate (6) and the outer end face of the crossarm (1); the reinforcing ribs are the limiting clips (5).

3. A turn-around support barrier at a command platform of a bridge-launching machine according to claim 2, characterized in that: There are two sets of limit plates (2), and the two sets of limit plates (2) are respectively set on both sides of the flange plate (6); the two sets of limit plates (2) and their corresponding uprights (3), positioning supports (4) and limit clips (5) are all independent of each other.

4. A flip-up support barrier at a command platform of a bridge-launching machine according to claim 1, characterized in that: An ear plate (7) is installed on the second column at the position on the left side of the front end of the crossarm (1); a protective net (8) is installed between the ear plate (7) and the adjacent upright (3).

5. A flip-up support barrier at a command platform of a bridge-launching machine according to claim 1, characterized in that: The limiting plate (2) is a U-shaped channel steel structure; the axis of the limiting plate (2) is set perpendicular to the top surface of the crossbeam (1), and the back end face of the limiting plate (2) is set close to the front side of the crossbeam (1); a pair of positioning holes are opened at the lower middle position of the two side walls of the limiting plate (2); one end of the upright (3) is rotatably installed in the groove in the middle of the limiting plate (2) by means of a pin.

6. A flip-up support barrier at a command platform of a bridge-launching machine according to claim 1, characterized in that: One end of the positioning support rod (4) is rotatably mounted on the lower middle part of the upright rod (3) via a ball joint.

7. A flip-up support barrier at a command platform of a bridge-launching machine according to claim 1, characterized in that: The uprights (3) and the crossbars (9) are spliced ​​together to form a grid-like guardrail structure, and the maximum height of the grid holes does not exceed 500mm.

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