A device for adding a safety belt lanyard attachment point at a pre-existing hole
By designing safety belt and safety rope attachment points at the reserved holes, and using tension springs and ropes in conjunction with a ratchet and pawl structure, the problem of construction workers lacking suitable attachment points was solved, thus achieving safe and reliable protection for edge work.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY 12TH BUREAU GRP INT ENG CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-06-26
AI Technical Summary
In the construction of high-rise building projects, construction workers lack suitable safety belts or safety rope attachment points, and the existing expansion bolt method has a low safety factor and cannot meet the needs of safety management.
Design a safety belt safety rope attachment point device at a pre-reserved hole, including a main rod, end plate, wing rod, tension spring, hanging ring and pull rope. The tension spring and pull rope, together with the rotating wheel ratchet pawl structure, realize the opening and closing of the wing rod to provide a reliable attachment point.
It provides safe and reliable safety belt or rope attachment points, and the installation and removal process is simple, requires no additional tools, is reusable, economical, and does not damage the structure.
Smart Images
Figure CN224413203U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a device for adding safety belt and safety rope attachment points at pre-reserved holes, belonging to the technical field of edge protection devices in building construction. Background Technology
[0002] In the construction of high-rise building projects, construction workers inevitably have to work on the edge of the structure. Working on the edge is extremely dangerous. In order to prevent construction workers from falling from heights and to ensure their own safety, they must wear safety belts or safety ropes when working on the edge.
[0003] During actual construction, workers often face a situation where safety belts or ropes lack suitable attachment points. Currently, some edge-prone operations use expansion bolts to set temporary attachment points, but this method has a low safety factor and cannot meet the needs of project safety management. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a device that uses reserved holes to increase the attachment points of safety belts or safety ropes, which is convenient to use and safe and reliable.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a device for adding safety belt and safety rope attachment points at pre-reserved holes, comprising a main rod, a head plate, wing rods, tension springs, and hanging rings. The upper end of the main rod is vertically fixed at the center of the bottom surface of the head plate. Multiple ribs are evenly distributed around the main rod on the bottom surface of the head plate. Each rib is hinged to one end of a wing rod. The middle of each wing rod is connected to one end of a tension spring. The other end of the tension spring is connected to the top surface of the head plate to pull the wing rods to rotate upwards. The bottom edge of the head plate is used to limit the movement of the wing rods.
[0006] Multiple wing rods are arranged radially, and a hanging ring is fixed to the lower end of the main rod.
[0007] Furthermore, this utility model also includes a pull rope, the lower part of which is a single strand, and the upper part which consists of multiple strands equal to the number of wing rods, and each strand is fixed to the middle of the multiple wing rods.
[0008] Furthermore, this utility model also includes a rotating wheel, which is fixed on the main rod. The lower end of the pull rope is fixed and wound around the rotating wheel, and the rotating wheel is also provided with a ratchet and pawl structure.
[0009] Furthermore, the pull rope is a steel wire rope.
[0010] Furthermore, a first connecting ring is fixed in the middle of each wing rod, and a second connecting ring is fixed at the corresponding position on the top surface of the end cap plate. One end of the tension spring is hooked on the first connecting ring, and the other end is hooked on the second connecting ring.
[0011] Furthermore, the number of wing rods is four.
[0012] Furthermore, the main rod is a round rod, and the wing rod is a square rod.
[0013] Furthermore, a limiting boss is provided on the bottom edge of the end cap plate for limiting the wing rod.
[0014] Compared with the prior art, the present invention has the following beneficial effects.
[0015] 1. This utility model has two states: open and retracted. No additional tools are required for installation and dismantling. Holes in the floor slab or wall can be used to provide attachment points for safety belts or safety ropes for edge work. It is simple, convenient and safe to use.
[0016] 2. In this utility model, the opening and retraction of multiple wing rods are achieved by using a tension spring and a pull rope, while the ratchet and pawl structure on the rotating wheel is used to maintain the retracted state. The structure is simple and reasonable, with high assembly and disassembly efficiency, convenient use, and low failure rate.
[0017] 3. In this utility model, the bottom surface of the end cap plate is used to limit the wing rod. A limiting boss can also be set on the bottom edge of the end cap plate to further limit the angle between the wing rod and the main rod, thereby enhancing the support effect of this utility model.
[0018] 4. This utility model does not require expansion bolts during installation and dismantling, and causes no damage. It can be reused and is economical. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the structure of this utility model in its unfolded state.
[0021] Figure 2 This is a schematic diagram of the structure of the present invention in its contracted state.
[0022] Figure 3 for Figure 1 Top view.
[0023] Figure 4 for Figure 1 A magnified view of a portion of point A in the middle.
[0024] Figure 5 This is the usage state of the present utility model. Figure 1 .
[0025] Figure 6 This is the usage state of the present utility model. Figure 2 .
[0026] In the diagram: 1 is the main rod, 2 is the end plate, 3 is the wing rod, 4 is the tension spring, 5 is the hanging ring, 6 is the rib plate, 7 is the pull rope, 8 is the wheel, 9 is the first connecting ring, 10 is the second connecting ring, 11 is the limiting boss, and 12 is the floor slab. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.
[0028] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings of this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this utility model, provided that it does not affect the effects and purposes that this utility model can produce. It should be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.
[0029] The present invention provides the following embodiments.
[0030] like Figure 1 , Figure 2 , Figure 3 As shown, this utility model discloses a device for adding a safety belt safety rope attachment point at a pre-reserved hole, including a main rod 1, a head plate 2, a wing rod 3, a tension spring 4, and a hanging ring 5. The upper end of the main rod 1 is vertically fixed at the center of the bottom surface of the head plate 2. Multiple ribs 6 are evenly distributed around the main rod 1 on the bottom surface of the head plate 2. Each rib 6 is hinged to one end of a wing rod 3. The middle part of each wing rod 3 is connected to one end of a tension spring 4. The other end of the tension spring 4 is connected to the top surface of the head plate 2 to pull the wing rod 3 to rotate upward. The bottom edge of the head plate 2 is used to limit the movement of the wing rod 3.
[0031] Multiple wing rods 3 are arranged radially, and a hanging ring 5 is fixed to the lower end of the main rod 1.
[0032] This utility model also includes a pull rope 7, the lower part of which is a single rope, and the upper part consists of multiple strands, the same number as the wing rods 3, which are respectively fixed to the middle of the multiple wing rods 3.
[0033] The pull rope 7 makes the retraction process of the multiple wing rods 3 more convenient. As long as the pull rope 7 is pulled down, the multiple wing rods 3 can rotate downward and retract simultaneously.
[0034] The present invention also includes a rotating wheel 8, which is fixed on the main rod 1. The lower end of the pull rope 7 is fixed and wound around the rotating wheel 8. The rotating wheel 8 is also provided with a ratchet and pawl structure.
[0035] The rotating wheel 8 with ratchet and pawl structure can maintain the tension of the pull rope 7, keeping the present invention in a contracted state. If it needs to be opened, simply release the pawl, and under the pull of the tension spring 4, the rotating wheel 8 releases the pull rope 7, and the multiple wing rods 3 can be opened, allowing the present invention to reach the opened state.
[0036] The pull rope 7 is a steel wire rope. It can also be a strong and wear-resistant rope made of other materials.
[0037] Each of the wing rods 3 has a first connecting ring 9 fixed in the middle, and a second connecting ring 10 is fixed at the corresponding position on the top surface of the end plate 2. One end of the tension spring 4 is hooked on the first connecting ring 9, and the other end is hooked on the second connecting ring 10.
[0038] The number of wing rods 3 can be four or three.
[0039] The main rod 1 is a round rod, and the wing rod 3 is a square rod.
[0040] like Figure 4 As shown, a limiting boss 11 for limiting the wing rod 3 is provided on the bottom edge of the end plate 2.
[0041] The height of the limiting boss 11 can limit the opening angle of the wing rod 3. Generally, the angle between the wing rod 3 and the main rod 1 can be an acute angle or a right angle, and generally does not exceed 90°.
[0042] This utility model has two states, one of which is... Figure 1 The diagram shows the extended state, in which the pull rope 7 is slack, and the multiple wing rods 3 are opened under the tension of their respective tension springs 4. The opening angle of the wing rods 3 is limited by the limiting bosses 11 on the bottom surface or edge of the end plate 1. Another configuration is as shown... Figure 2 The diagram shows the contracted state, in which the pull rope 7 is taut, the wheel 8 maintains the tension of the pull rope 7 under the action of the ratchet and pawl structure, and the multiple wing rods 3, under the pulling action of the pull rope 7, overcome the tension of the tension spring 4 and contract downward to close to the main rod 1.
[0043] like Figure 5 , Figure 6 As shown, before working near the edge, first rotate the wheel 8 to retract the device. Then, place the end plate 1 of the device near the pre-drilled hole on the floor slab 12 and pass it through the floor slab 12. Next, release the ratchet and pawl structure on the wheel 8, allowing the wing rod 3 to open under the action of the tension spring 4. The wing rod 3 is then suspended on the floor slab 12. At this point, the hanging ring 5 at the lower end of the main rod 1 can serve as the attachment point for the safety belt or safety rope. Workers can then safely perform edge work by securing the safety belt or safety rope to the hanging ring 5. After the work is completed, lift the device upwards, rotate the wheel 8 to tighten the pull rope 7, retract the wing rod 3, and finally retrieve the device through the pre-drilled hole. It can be reused for future applications.
[0044] This invention can also be installed using holes in the wall; simply pass it horizontally through the hole in the wall using the same method.
[0045] This invention is simple to operate, safe and reliable, and is very suitable for adding attachment points to safety belts or safety ropes before working near edges to ensure the safety of construction workers.
[0046] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A device for adding a safety belt / safety rope attachment point at a pre-drilled hole, characterized in that: It includes a main rod (1), a head plate (2), a wing rod (3), a tension spring (4), and a hanging ring (5). The upper end of the main rod (1) is vertically fixed at the center of the bottom surface of the head plate (2). Multiple ribs (6) are evenly distributed around the main rod (1) on the bottom surface of the head plate (2). Each rib (6) is hinged to one end of a wing rod (3). The middle part of each wing rod (3) is connected to one end of a tension spring (4). The other end of the tension spring (4) is connected to the top surface of the head plate (2) to pull the wing rod (3) to rotate upward. The bottom edge of the head plate (2) is used to limit the wing rod (3). Multiple wing rods (3) are arranged radially, and a hanging ring (5) is fixed at the lower end of the main rod (1).
2. The device for adding a safety belt / safety rope attachment point at a pre-reserved hole according to claim 1, characterized in that: It also includes a pull rope (7), the lower part of which is a single rope, and the upper part consists of multiple strands, the same number as the wing rods (3), which are fixed to the middle of the multiple wing rods (3) respectively.
3. The device for adding a safety belt / safety rope attachment point at a pre-reserved hole according to claim 2, characterized in that: It also includes a rotating wheel (8), which is fixed on the main rod (1). The lower end of the pull rope (7) is fixed and wrapped around the rotating wheel (8). The rotating wheel (8) is also equipped with a ratchet and pawl structure.
4. A device for adding a safety belt / safety rope attachment point at a pre-reserved hole according to claim 2 or 3, characterized in that: The pull rope (7) is a steel wire rope.
5. A device for adding a safety belt / safety rope attachment point at a pre-reserved hole according to claim 1, 2, or 3, characterized in that: Each of the wing rods (3) has a first connecting ring (9) fixed in the middle, and a second connecting ring (10) is fixed at the corresponding position on the top surface of the end plate (2). One end of the tension spring (4) is hooked on the first connecting ring (9), and the other end is hooked on the second connecting ring (10).
6. A device for adding a safety belt / safety rope attachment point at a pre-reserved hole according to claim 1, 2, or 3, characterized in that: The number of the wing rods (3) is four.
7. A device for adding a safety belt / safety rope attachment point at a pre-reserved hole according to claim 1, 2, or 3, characterized in that: The main rod (1) is a round rod, and the wing rod (3) is a square rod.
8. A device for adding a safety belt / safety rope attachment point at a pre-reserved hole according to claim 1, 2, or 3, characterized in that: The end cap (2) has a ring of limiting bosses (11) on the bottom edge for limiting the wing rod (3).