Anti-falling device for rectangular pier column formwork

Abstract

The utility model belongs to the field of highway bridge construction safety protection devices, and relates to an anti-falling device for a rectangular pier column formwork. The anti-falling device is provided with a connecting lug plate which is welded and fixed with the rectangular pier column template; the number of the connecting lug plates is two. A through hole for the shaft pin to penetrate through is reserved in the center of the connecting lug plate; a bearing is arranged between the two connecting lug plates; an inner ring of the bearing is fixedly connected with the shaft pin; the two ends of the shaft pin extend out of the connecting lug plates, and limiting rings are arranged at the shaft ends of the shaft pin. A net hanging rod is fixed on the outer ring of the bearing; the net hanging rods protrude out of the rectangular pier column formwork. Net hanging rings for hanging the protective net are arranged on the net hanging rods; the net hanging rods are of structures capable of rotating relative to the connecting lug plates; limiting plates are welded to the lower portions of one sides of the two connecting lug plates. The protective net is hung on the periphery of the rectangular pier column formwork through the multiple anti-falling devices. The device has the advantages of being simple in component composition, easy and convenient to install, good in stability, safe, reliable, high in universality, capable of being folded and unfolded and small in interference to construction.

Description

Technical Field

[0001] This utility model belongs to the field of safety protection devices for highway bridge construction, and relates to a fall prevention device for rectangular pier formwork. Background Technology

[0002] In highway bridge construction, rectangular piers are a common substructure form, typically exceeding 30 meters in height. Construction areas for rectangular piers are often concentrated areas for work at height, requiring workers to perform complex operations such as rebar installation and concrete pouring in a high-altitude environment. This carries a significant risk of fall, and inadequate safety measures can easily lead to falls, posing a serious threat to life. Therefore, the importance of fall arrest devices for rectangular pier formwork is increasingly evident. These devices provide reliable safety for workers at height, allowing them to perform their tasks with peace of mind and reducing the psychological burden of fearing falls, thereby effectively improving construction efficiency and quality. Furthermore, by preventing accidental falls of construction materials and tools, they avoid the risk of falling objects striking workers and machinery below, reducing economic losses and project delays caused by accidents. However, existing protective measures often suffer from inconvenient installation, insufficient stability, or incompatibility with different specifications of rectangular pier formwork. Therefore, a more effective, convenient, and versatile fall arrest device for rectangular pier formwork is urgently needed. Utility Model Content

[0003] The purpose of this utility model is to provide a fall prevention device for rectangular pier formwork to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A fall arrestor for rectangular pier formwork includes two connecting lugs welded to the rectangular pier formwork. Each connecting lug has a through hole at its center for a pin to pass through. A bearing is positioned between the two connecting lugs. The inner ring of the bearing is fixed to the pin. Both ends of the pin extend beyond the connecting lugs and are fitted with limiting rings. A hanging net rod is fixed to the outer ring of the bearing. The hanging net rod protrudes beyond the rectangular pier formwork and has a hanging ring for suspending a protective net. The hanging net rod is rotatable relative to the connecting lugs. A limiting plate is welded to the lower part of one side of each of the two connecting lugs to limit the rotation of the hanging net rod. Multiple fall arrestors are arranged around the rectangular pier formwork, suspending the protective net around the formwork.

[0006] The limiting ring has an internal threaded structure, and the two ends of the shaft pin are provided with threads. After the bearing assembly is installed, the limiting ring is slidably installed on the outside of the connecting ear plate as a double protection measure to ensure the safety of the rectangular pier column formwork anti-fall device.

[0007] The upper end of the limiting plate has a notch with the same radius as the hanging pole. The limiting plate is used to ensure that the rectangular pier column formwork anti-fall device has an upward angle of about 30° during use.

[0008] The hanging ring is a crescent-shaped ring, which is set on the left and right sides of the hanging pole and welded to the hanging pole.

[0009] The present invention proposes a fall prevention device for rectangular pier column formwork, which has the advantages of simple component composition, easy installation, good stability, safety and reliability, strong versatility, retractability, and minimal interference with construction. Attached Figure Description

[0010] Figure 1 This is a plan view of a fall prevention device for rectangular pier formwork according to the present invention;

[0011] Figure 2 This is a schematic elevation view of a fall prevention device for rectangular pier formwork according to the present invention;

[0012] Figure 3 This is a schematic diagram of a fall prevention device for rectangular pier formwork according to the present invention;

[0013] Figure 4 This is a detailed schematic diagram of a fall prevention device for rectangular pier formwork according to the present invention (with the connecting ear plate hidden on one side);

[0014] Figure 5 This is a schematic diagram of a net ring for a fall prevention device used in rectangular pier formwork according to the present invention;

[0015] Legend: 1. Connecting ear plate; 2. Bearing assembly; 3. Shaft pin; 4. Net hanging rod; 5. Brake plate; 6. Limiting ring; 7. Net hanging ring; 8. Protective net; 9. Rectangular pier column formwork. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1-5 As shown, a fall prevention device for rectangular pier formwork includes connecting lugs 1 welded and fixed to the rectangular pier formwork 9; there are two connecting lugs 1; a through hole for a pin 3 to pass through is pre-drilled in the center of each connecting lug 1; a bearing 2 is provided between the two connecting lugs 1; the distance between the two connecting lugs 1 matches the thickness of the bearing; the inner ring of the bearing 2 is fixedly connected to the pin 3; both ends of the pin 3 extend out of the connecting lugs 1, and a limiting ring 6 is provided at its shaft end; a hanging net rod 4 is fixed on the outer ring of the bearing 2; the hanging net rod 4 protrudes from the rectangular pier formwork; the hanging net rod 4 has a hanging net ring for suspending a protective net; the hanging net rod 7 is a structure that can rotate relative to the connecting lugs 1; a limiting plate 5 is welded to the lower part of one side of each of the two connecting lugs 1 to limit the rotation of the hanging net rod; multiple fall prevention devices are provided around the rectangular pier formwork, and the multiple fall prevention devices suspend the protective net around the rectangular pier formwork.

[0018] The limiting ring 6 has an internal threaded structure, and the two ends of the shaft pin are provided with threads. After the bearing assembly is installed, the limiting ring is slidably installed on the outside of the connecting ear plate as a double protection measure to ensure the safety of the rectangular pier column formwork anti-fall device.

[0019] The upper end of the limiting plate 5 has a notch with the same radius as the hanging net pole. The limiting plate is used to ensure that the rectangular pier column formwork anti-fall device has an upward angle of about 30° during the use stage.

[0020] The hanging ring is a crescent-shaped ring, which is set on the left and right sides of the hanging pole and welded to the hanging pole.

[0021] In use, after the connecting ear plate 1 and the limiting plate 5 are welded and fixed, the whole is fixed on the reserved node plate of the construction platform; after the hanging net rod 4 is fixedly connected to the bearing 2 and the hanging net ring 7, the shaft pin 3 is installed, and finally the limiting ring 4 with the threaded structure is installed. At this point, the installation of the rectangular pier formwork anti-fall device is completed; the on-site workers adjust the working status of the rectangular pier formwork anti-fall device according to the working environment. When not in use, the anti-fall net is removed, and the hanging net rod is rotated to suspend it on the guardrail of the rectangular pier formwork.

[0022] The above description is merely the basic principle, main features, and advantages of this utility model. Any person skilled in the art may make changes or improvements to the above technical solution and apply it to other fields. However, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A fall arrest device for a rectangular pier form, characterised in that: The anti-falling device has connecting lug plates welded with the rectangular pier formwork; the connecting lug plates are two; the center of the connecting lug plates is provided with a through hole for the shaft pin to pass through; a bearing is arranged between the two connecting lug plates; the inner ring of the bearing is fixedly connected with the shaft pin; the two ends of the shaft pin are both extended out of the connecting lug plates, and a limiting ring is arranged at the shaft end; the outer ring of the bearing is fixedly provided with a net hanging rod; the net hanging rod is arranged to protrude from the rectangular pier formwork; the net hanging rod is provided with a net hanging ring for suspending the protective net; the net hanging rod is rotatable relative to the connecting lug plates; a limiting plate for limiting the rotation of the net hanging rod is welded at the lower part of one side of the two connecting lug plates; the anti-falling device is multiple and arranged along the periphery of the rectangular pier formwork; the multiple anti-falling devices suspend the protective net around the rectangular pier formwork.

2. A fall arrest device for a rectangular pier form as claimed in claim 1, characterised in that: The limiting ring is internally provided with a threaded sleeve, and the two ends of the shaft pin are provided with a threaded nut.

3. A fall arrest device for a rectangular pier form as claimed in claim 1, characterised in that: The upper end of the limiting plate is provided with a notch consistent with the radius of the net hanging rod.

4. A fall arrest device for a rectangular pier form as claimed in claim 1, characterised in that: The net hanging ring is a half-moon shaped ring and is arranged on the left and right sides of the net hanging rod and is fixedly welded with the net hanging rod.

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