Self-locking vertical fall arrest device

Abstract

The application discloses a self-locking vertical anti-falling device, which comprises a device body and a hanging ring fixed to the outside of the device body and used for hanging a safety belt; a hole for passing a safety rope is formed in the center of the device body, the inside of the device body is hollow and is provided with at least two rows of rollers arranged in the circumference of the hole and used for abutting against the safety rope; a self-locking structure comprises a first supporting rod movably arranged and an inertia trigger device used for moving the first supporting rod to the first end of the first supporting rod to limit the safety rope, and the inertia trigger device is triggered by sudden falling of the device body relative to the safety rope. The device is convenient to carry and simple to install, and greatly increases the use efficiency of operators.

Description

Technical Field

[0001] This invention relates to the field of building construction, and specifically to a self-locking vertical fall arrestor. Background Technology

[0002] In the construction industry, tower cranes are widely used as vertical transportation machinery. Tower crane operators need to climb several meters or even tens of meters high every day to enter the control room. However, during the climbing process, operators often lack reliable fall protection devices, or the cost of installing fall protection devices is high and the use is cumbersome, so operators are unwilling to install or use them. Summary of the Invention

[0003] To address the shortcomings of existing fall arrest devices, this invention provides a self-locking vertical fall arrest device that is easy to carry and install, greatly increasing the efficiency of operators.

[0004] To achieve the above technical effects, the self-locking vertical fall arrestor of the present invention includes a device body and a hanging ring fixed to the outside of the device body for attaching a safety belt; the device body has a hole in the center for a safety rope to pass through, and the interior of the device body is hollow and equipped with:

[0005] At least two rows of rollers are arranged circumferentially along the hole for abutting the safety rope;

[0006] The self-locking structure includes a movable first support rod and an inertial triggering device for moving the first support rod until a first end of the first support rod abuts against the safety rope to limit its position. The inertial triggering device is triggered by a sudden drop of the device body relative to the safety rope.

[0007] Furthermore, the hole extends vertically through the device body, and at least two rows of rollers are distributed vertically at intervals within the device body, on both sides of or around the hole.

[0008] Furthermore, the minimum distance between at least two rows of rollers is equal to the diameter of the hole, which is equal to the outer diameter of the safety rope.

[0009] Furthermore, the first support rod is horizontally positioned between two adjacent upper and lower rollers, and the first end of the first support rod is provided with wear-resistant rubber.

[0010] Furthermore, the inertial triggering device includes a vertically movable second support rod and a first spring disposed at both ends of the second support rod, wherein the end of the first spring away from the second support rod contacts the inner wall of the device body.

[0011] Furthermore, a pad is provided on the side of the second support rod near the first support rod. The pads are located one-to-one below the first support rod in the initial state, and when the second support rod moves upward due to inertia, the pads push against the first support rod in the direction of the safety rope.

[0012] Furthermore, the device body is provided with support blocks corresponding to both ends of the second support rod, and the support blocks are provided with support holes, and the first spring and the two ends of the second support rod are placed in the support holes.

[0013] Furthermore, retractable limiting posts are provided at both ends of the second support rod in the radial direction, and limiting holes are provided inside the support hole to cooperate with the limiting posts.

[0014] Furthermore, the limiting post is a steel post, and the two ends of the second support rod are provided with mounting holes for accommodating the limiting post in the radial direction. The limiting post is telescopically installed in the mounting holes by a second spring.

[0015] Furthermore, both the first support rod and the second support rod are solid steel bars.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The device consists of the device body and the lifting ring. There is a hole in the center of the device body so that the safety rope can pass through the device, and the lifting ring is for the operator to hang the safety belt here, which is convenient to carry.

[0018] 2. Before use, simply attach the safety rope to a reliable position at the top of the building structure (such as a tower crane). The operator must wear a safety belt and attach it to the lifting ring. Then, thread the safety rope through the hole in the device body for normal use. Attached Figure Description

[0019] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the self-locking vertical fall arrestor according to an embodiment of the present invention.

[0021] Figure 2 This is a top view schematic diagram of a self-locking vertical fall arrestor according to an embodiment of the present invention.

[0022] Figure 3 for Figure 2 Sectional view at point 1-1.

[0023] Figure 4 for Figure 3 A magnified view of part A.

[0024] The correspondence between the numbers in the attached diagram is as follows:

[0025] 1-Device body; 11-First support rod; 111-Wear-resistant rubber; 12-Second support rod; 121-Padded block; 13-Support block; 14-First spring; 15-Second spring; 16-Limiting post; 17-Limiting hole; 2-Lifting ring; 3-Hole; 4-Roller. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0028] Example

[0029] See Figures 1-4 This embodiment provides a self-locking vertical fall arrestor, which mainly includes a device body 1 and a hanging ring 2 fixed to the outside of the device body for attaching a safety belt; the device body 1 has a hole 3 in the center for the safety rope to pass through, and the interior of the device body 1 is hollow and equipped with:

[0030] At least two rows of rollers 4 are arranged around the perimeter of the hole for attaching to the safety rope;

[0031] The self-locking structure includes a movable first support rod 11 and an inertial triggering device for moving the first support rod 11 to abut against the first end of the first support rod 11 to limit the safety rope. The inertial triggering device is triggered by a sudden drop of the device body 1 relative to the safety rope.

[0032] Specifically, the device body 1 is a rectangular shell measuring 200mm × 400mm × 100mm, made of steel plate. A semi-circular lifting ring 2 is welded and fixed to one side wall of the device body 1, allowing the operator to attach their safety belt to the ring 2. A hole is vertically opened at the center of the device body 1, allowing the safety rope to pass through. Specifically, holes 4 are opened at corresponding positions at the center of the top and bottom plates of the rectangular shell. The safety rope can be passed through one hole and out through the other hole, thus linking the device body and the safety rope together.

[0033] Furthermore, at least two rows of rollers 4 are vertically spaced within the device body 1, on both sides or around the hole 3. The rollers 4 are preferably symmetrically arranged and can be driven by axles on both sides or around the hole 3. The rollers 4 are positioned where the safety rope passes, so that under normal use, the device can properly attach to the safety rope under the action of the rollers. Therefore, one side of the roller 4 is always in contact with the safety rope. Preferably, the minimum distance between at least two rows of rollers 4 is equal to the diameter of the hole, and the diameter of the hole is equal to the outer diameter of the safety rope.

[0034] Furthermore, the first support rod 11 is laterally movably installed inside the device body 1, and each first support rod 11 is positioned between two adjacent rollers 4. The first end of the first support rod 11 is close to the location of the safety rope and is provided with wear-resistant rubber 111 at the end to increase the friction with the safety rope and protect the safety rope from damage due to direct contact with the first support rod. Under normal use, the initial position of the first end of the first support rod 11 is flush with the wheel surface of the roller 4 on the side closest to the safety rope.

[0035] Furthermore, the inertial triggering device includes a vertically movable second support rod 12 and a first spring 14 disposed at both ends of the second support rod 12, with the end of the first spring 14 away from the second support rod 12 in contact with the inner wall of the device body.

[0036] Preferably, the second support rod 12 is provided with a pad 121 on the side near the first support rod 11. The pads 121 are located below the first support rod 11 in the initial state. When the second support rod 12 moves upward due to inertia, the pads 121 also move upward, thereby contacting the second end of the first support rod 11 and pushing the first support rod 11 in the horizontal direction towards the safety rope, so that the first end of the first support rod 11 presses against the safety rope, locks the safety rope, and fixes the device body 11 relative to the safety rope.

[0037] Furthermore, support blocks 13 are provided at both ends of the second support rod 12 within the device body 1. Each support block 13 has a support hole, and the first spring 14 and both ends of the second support rod 12 are placed within the support hole. Retractable limiting posts 16 are radially provided at both ends of the second support rod 12, and limiting holes 17 are provided inside the support hole to accommodate the limiting posts 16. The limiting posts 17 can be steel columns. Mounting holes for accommodating the limiting posts 17 are radially opened at both ends of the second support rod 12. The limiting posts 17 are retractably mounted within the mounting holes via the second spring 15. When the second support rod 12 moves upward, the limiting posts 17 move upward together with the second support rod to the pre-opened limiting post 17 position. The compressed second spring 15 pushes the limiting post 17 out and inserts it into the limiting post 17, locking the vertical movement of the second support rod 12. The device body 1 will remain in a state of clamping the safety rope.

[0038] Preferably, both the first support rod 11 and the second support rod 12 are made of solid steel bars.

[0039] The method of using the self-locking vertical fall arrestor of the present invention is as follows:

[0040] Before use, the safety rope must be secured to a reliable position at the top of the main structure (such as a tower crane). The operator must wear a safety belt and attach it to the lifting ring 2 on the outside of the device body 1. Then, the safety rope is passed through the hole 3 in the center of the device body 1, and it can be used normally.

[0041] Under normal use, the device of this invention can be normally attached to the safety rope with the help of the built-in rollers.

[0042] The self-locking structure of the device of this invention is mainly triggered by inertia. The triggering device consists of a vertical solid steel bar (i.e., the second support rod) and first springs at both ends. When the operator climbs at a constant speed, the triggering device is in a balanced state and will not trigger the self-locking. However, when the operator falls, the device suddenly falls, while the vertical solid steel bar maintains its original balanced state due to inertia. This can be understood as the device body remaining stationary while the vertical solid steel bar moves upward. Because there are pads on the vertical solid steel bar, the upward movement compresses the horizontal solid steel bar, causing the wear-resistant rubber (friction end) of the horizontal solid steel bar to clamp the safety rope, reducing the falling speed through friction until it stops. In addition, there is an embedded structure at the end of the vertical solid steel bar, which consists of a steel column (i.e., a limiting column) and a compressed second spring. When the vertical solid steel bar moves upward, the embedded structure moves to the horizontal limiting block pre-cut on the support block inside the device body. The compressed second spring pushes the steel column out, locking the vertical movement of the vertical solid steel bar. The device of the present invention will always be in the state of clamping the safety rope.

[0043] The self-locking vertical fall arrestor of this invention integrates all mechanisms into a device body measuring 200mm×400mm×100mm. When in use, it only requires a safety rope and a safety belt worn by the operator to function. It is easy to carry and install, greatly increasing the efficiency of the operator.

[0044] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A self-locking vertical fall arrestor, characterized in that, The device includes a main body and a lifting ring fixed to the outside of the main body for attaching a safety belt; the main body has a hole in its center for a safety rope to pass through, and the interior of the main body is hollow and equipped with: At least two rows of rollers are arranged circumferentially along the hole for abutting the safety rope; The self-locking structure includes a movable first support rod and an inertial triggering device for moving the first support rod to abutting the first end of the first support rod to limit the safety rope. The inertial triggering device is triggered by a sudden drop of the device body relative to the safety rope. The inertial triggering device includes a vertically movable second support rod and a first spring disposed at both ends of the second support rod, wherein the end of the first spring away from the second support rod contacts the inner wall of the device body. The second support rod has a pad on the side near the first support rod. In the initial state, the pads are located one-to-one below the first support rod, and when the second support rod moves upward due to inertia, the pads push against the first support rod in the direction of the safety rope.

2. The self-locking vertical fall arrestor according to claim 1, characterized in that, The hole extends vertically through the device body, and at least two rows of rollers are distributed vertically at intervals within the device body, on both sides or around the hole.

3. The self-locking vertical fall arrestor according to claim 2, characterized in that, The minimum distance between at least two rows of rollers is equal to the diameter of the hole, which is equal to the outer diameter of the safety rope.

4. The self-locking vertical fall arrestor according to claim 2, characterized in that, The first support rod is horizontally positioned between two adjacent upper and lower rollers, and the first end of the first support rod is provided with wear-resistant rubber.

5. The self-locking vertical fall arrestor according to claim 1, characterized in that, The device body has support blocks at both ends corresponding to the second support rod. The support blocks have support holes, and the first spring and both ends of the second support rod are placed in the support holes.

6. The self-locking vertical fall arrestor according to claim 5, characterized in that, The second support rod has retractable limiting posts at both ends radially, and the inner side of the support hole is provided with limiting holes to cooperate with the limiting posts.

7. The self-locking vertical fall arrestor according to claim 6, characterized in that, The limiting post is a steel post, and the two ends of the second support rod are provided with mounting holes for accommodating the limiting post in the radial direction. The limiting post is telescopically installed in the mounting holes by a second spring.

8. The self-locking vertical fall arrestor according to claim 1, characterized in that, Both the first support rod and the second support rod are solid steel bars.

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