A seat belt attachment device

Abstract

This utility model discloses a safety belt fastening point device, comprising a round steel bar and an iron plate. One end of the round steel bar is bent into a ring shape as the safety belt fastening point, and the other end of the round steel bar serves as a fixed end. A groove is formed inward from the fixed end of the round steel bar. A shaft hole is formed on the round steel bar at the position corresponding to the groove and along the radial direction of the round steel bar. The iron plate is a right-angled trapezoid, and a connecting hole is formed at the corner of the iron plate opposite to the right-angle end of the iron plate. The side of the iron plate with the connecting hole is inserted into the groove. A pin is inserted through the two shaft holes and the connecting hole. The right-angled side of the iron plate is used to press against the wall. The dynamic load capacity of the round steel bar is ≥12kN. This utility model does not damage the existing building structure and is installed entirely using the existing building structure, making it safe and reliable.

Description

Technical Field

[0001] This utility model relates to a safety belt fastening point device for working at heights, and more particularly to a safety belt fastening point device when there are tie bolt holes in the location. Background Technology

[0002] In traditional construction practices, safety belts are mainly secured using the following methods, but these methods have significant drawbacks. For example: the expansion bolt fixing method is time-consuming and labor-intensive, requiring 15-20 minutes per point. It is a one-time use method, cannot be reused, is costly, damages the building structure surface, causes permanent damage to the concrete structure, and cannot be reliably fixed to masonry walls or insulation layers, posing a risk of structural damage. The direct attachment method involves attaching the safety belt directly to pipes, steel beams, or temporary guardrails. This method lacks load-bearing capacity assessment and may exceed the limit load of the support point. Sharp edges can easily abrade the safety rope, leading to a risk of breakage. The attachment point location does not conform to the "high attachment, low use" principle, increasing the impact force of a fall. The lifeline system requires professional design and calculation, with the end fixing point bearing capacity needing to reach more than 12kN. The installation cost is high, requiring significant material and labor investment, and its applicability is limited, making it difficult to adapt to complex and ever-changing construction sites. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of existing technologies and provide a safety belt fastening point device. This device can achieve rapid fixing without drilling or welding, and can make full use of the existing structure of existing buildings. It is safe, reliable, convenient and reusable.

[0004] To address the problems existing in current construction practices, this utility model adopts the following technical solution:

[0005] This utility model discloses a safety belt fastening point device, comprising a round steel bar and an iron plate. One end of the round steel bar is bent into a ring shape to serve as the safety belt fastening point, and the other end of the round steel bar serves as a fixed end. A groove is formed inward from the fixed end of the round steel bar. A shaft hole is formed on the round steel bar at the position corresponding to the groove and along the radial direction of the round steel bar. The iron plate is a right-angled trapezoid, and a connecting hole is formed at the corner of the iron plate opposite to the right-angle end of the iron plate. The side of the iron plate with the connecting hole is inserted into the groove. A pin is set through the two shaft holes and the connecting hole. The right-angled side of the iron plate is used to press against the wall. The dynamic load capacity of the round steel bar is ≥12kN.

[0006] The beneficial effects of this utility model are:

[0007] (1) This utility model is simple to manufacture, has low production cost and can be reused due to the structural characteristics of the device, and has a high turnover rate.

[0008] (2) The device of this utility model can adapt to various working conditions during construction, and the installation and fixing time is short. The device is relatively portable and can be disassembled and installed at any time.

[0009] (3) The use of this utility model device will not damage the existing building structure, and the existing building structure is used for fixed installation.

[0010] (4) This utility model device does not require professional calculations; it can be made simply by using materials that meet the requirements. Attached Figure Description

[0011] Figure 1 This is a front view of a seatbelt fastening point device according to this utility model;

[0012] Figure 2 This is a top plan view of a seatbelt fastening point device according to this utility model;

[0013] Figure 3 This is a schematic diagram illustrating the installation and use of a seatbelt fastening point device according to this utility model. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] This device can be made using steel bars. During the main structure construction phase, tie bolts are needed to fix the formwork during the formwork erection process. After the concrete is poured and the formwork is removed, a large number of tie bolt holes will be generated at various locations. In the subsequent high-altitude operation construction phase, this structure uses these tie bolt holes to form safety belt attachment points to ensure the safety of high-altitude workers.

[0016] like Figure 1 As shown, this utility model discloses a safety belt fastening point device, comprising a round steel bar and an iron plate. One end of the round steel bar is bent into a ring shape to serve as the safety belt fastening point, and the other end of the round steel bar serves as a fixed end. A groove 4 is formed inward from the fixed end of the round steel bar. A shaft hole 3 is formed on the round steel bar at the position corresponding to the groove and along the radial direction of the round steel bar. The iron plate is a right-angled trapezoid, and a connecting hole is formed at the corner of the iron plate opposite to the right-angle end of the iron plate. The side of the iron plate with the connecting hole is inserted into the groove. A pin is provided passing through the two shaft holes and the connecting hole. The right-angled side of the iron plate is used to press against the wall. The dynamic load capacity of the round steel bar is ≥12kN. As one embodiment of this utility model, the round steel bar is Q355B round steel bar with a diameter ≥φ16mm; or the diameter of the round steel bar is ≥φ20mm.

[0017] like Figure 2 As shown, the iron sheet can rotate around the pin in the groove, thus enabling it to be turned.

[0018] Depend on Figure 3 As shown, this utility model discloses a safety belt fastening point device. The length of the round steel can be selected according to the actual working conditions on site. One end of the round steel is the safety belt fastening point, and the other end is an iron plate combined with the round steel as a fixing device. By inserting it into the tie bolt holes of the existing building wall, the iron plate is pushed to the lower end and the right-angle edge is locked into the wall to form the safety belt fastening point. When the personnel hang the safety belt on the safety belt fastening point, the device forms a firm and reliable safety belt fastening point device, ensuring the life safety of personnel working at heights and near edges. This device complies with the requirements for fastening point devices in GB 30862.

[0019] The round steel used in this device should be φ16mm or larger. The performance test results for φ16mm round steel are as follows:

[0020] I. Static Load Performance

[0021] 1. Theoretical bearing capacity calculation

[0022] Q235B material (σ_b=370MPa):

[0023]

[0024] Q355B material (σ_b=490MPa)

[0025]

[0026] The calculations above show that the theoretical load-bearing capacity of both types of round steel with a diameter of φ16mm can meet the requirements of the seat belt fastening point.

[0027] II. Dynamic Load Performance (Calculations Based on Impact Simulation Drop Tests)

[0028] 1. Mandatory requirements of national standards

[0029] Dynamic impact force: Simulates a 100kg person falling and must withstand an impact of ≥6kN (GB 30862).

[0030] Safety device requirements: The dynamic load-bearing capacity of the hanging point must be ≥2 times the impact force (i.e., ≥12kN).

[0031] 2. Dynamic response of φ16mm round steel

[0032]

[0033] Based on the analysis and comparison of national mandatory standards, the above dynamic load test results show that Q355B material meets the requirements of seat belt fastening point devices.

[0034] III. Comparison of Dynamic and Static Loads and Safety Boundaries

[0035]

[0036] The following conclusions were drawn from the analysis of the dynamic and static loads and safety boundaries of two types of steel bars:

[0037] The data above shows that Q355B round steel with a diameter of 16mm or more fully meets the application requirements of this safety belt fastening device. However, it is preferred to use Φ20mm round steel as the parameter for this device, which can both increase the safety margin and fully meet the requirements under various stress conditions.

[0038] The above-described specific embodiments are merely illustrative and not restrictive. Those skilled in the art can make many modifications under the guidance of this utility model without departing from the spirit and scope of the claims, and these modifications are all protected by this utility model.

Claims

1. A seat belt anchorage comprising a round steel and a sheet iron, characterized in that: One end of the round steel is bent into a ring shape to serve as a safety belt fastening point, and the other end of the round steel serves as a fixed end. A groove is formed inward from the fixed end of the round steel. A shaft hole is formed on the round steel at the position corresponding to the groove and along the radial direction of the round steel. The iron sheet is a right-angled trapezoid. A connecting hole is formed at the corner of the iron sheet opposite to the right-angle end of the iron sheet. The side of the iron sheet with the connecting hole is inserted into the groove. A pin is set through the two shaft holes and the connecting hole. The right-angled side of the iron sheet is used to fit tightly against the wall. The dynamic load capacity of the round steel is ≥12kN.

2. The belt retraction device of claim 1, wherein: The diameter of the round steel bar is ≥ φ16mm, and the round steel bar is Q355B round steel bar.

3. The belt retraction device of claim 1 or 2, wherein: The diameter of the round steel bar is ≥ φ20mm.

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