Combined anti-fall device

Abstract

The technical field of transmission pole tower installation safety facilities of the present invention discloses a combined anti-fall device, including: a gripping part; a rope loop connecting part, fixedly arranged at the first end of the gripping part; a fixing part, arranged at the second end of the gripping part, including a first hook and a second hook, the first hook is fixedly connected to the first side of the second end of the gripping part, the second hook is rotatably connected to the second side of the second end of the gripping part, the first hook, the second hook and the gripping part enclose a receiving hole that can accommodate a horizontal rod of a ladder, and the second hook is located on the inner side of the first hook, and the outer side wall of the second hook is partially in contact with the inner side wall of the first hook; a foot nail hole for connecting with a foot nail fixed on the transmission pole tower is installed at one end of the inner side wall of the first hook away from the gripping part, and the diameter of the foot nail hole is larger than the diameter of the cross section of the foot nail. The present invention has low cost and strong versatility.

Description

Technical Field

[0001] The invention relates to the technical field of safety facilities for installing power transmission towers, and in particular to a combined anti-falling device. Background Art

[0002] The transmission tower anti-fall devices in the prior art are mainly divided into the following two categories:

[0003] The first is the slide rail anti-fall device that is installed with the transmission tower during its construction. The device is not widely used and is not installed on most towers. The second is the suspended anti-fall device, represented by the speed differential self-locking device. This device needs to be installed in advance for each operation. The first and last workers cannot be protected during the installation and removal process. The use of drone anti-fall device suspension cannot be widely popularized due to the cumbersome and complicated process and high cost. Therefore, there is currently no easy-to-popular and low-cost transmission line tower anti-fall equipment. Summary of the invention

[0004] The invention provides a combined anti-falling device, which achieves the purposes of low cost and high versatility.

[0005] The present invention is achieved through the following technical solutions:

[0006] A combined fall prevention device is used for safety protection when climbing a vertical device before high-altitude work is required, comprising:

[0007] Grip part;

[0008] A rope loop connecting portion, fixedly arranged at the first end of the gripping portion, and used to be connected to a safety rope tied to the worker;

[0009] The fixing portion is arranged at the second end of the holding portion, and includes a first hook and a second hook, the first hook is fixedly connected to the first side of the second end of the holding portion, and the second hook is rotatably connected to the second side of the second end of the holding portion, the first hook, the second hook and the holding portion form a receiving hole that can accommodate the horizontal rod of the ladder, and the second hook is located on the inner side of the first hook, and in the absence of external force, the outer wall of the second hook is partially in contact with the inner wall of the first hook; the inner wall of the first hook is installed with a foot nail hole for connecting to a foot nail fixed on the transmission tower at one end away from the holding portion, and the diameter of the foot nail hole is larger than the diameter of the cross section of the foot nail.

[0010] As an optimization, the second side of the second end of the holding portion is recessed in the direction close to the rope loop connecting portion to provide a first groove, and a first rotating shaft is rotatably connected to the side wall of the first groove, the second hook is fixedly connected to the first rotating shaft, and two first baffles are relatively arranged at the openings of the first groove on both adjacent sides of the rotation direction of the second hook, and a torsion spring is fixedly sleeved on the first rotating shaft, and the two ends of the torsion spring are respectively fixedly connected to the side of the first baffle facing the first groove and the bottom of the first groove.

[0011] As an optimization, the side walls of the first groove extending from both sides of the first rotating shaft are respectively fixedly connected with fixed blocks, and a side of the fixed block close to the side wall of the first groove is fixedly connected with a plurality of universal beads, and the plurality of universal beads are arranged around the first rotating shaft, and the balls of the universal balls are in contact with the gripping part.

[0012] As an optimization, a foot nail hole is provided at one end of the inner side wall of the first hook away from the holding portion, and a second groove is recessed in the direction away from the holding portion at one end of the inner side wall of the first hook away from the holding portion, and the foot nail hole passes through the side wall of the second groove, the foot nail hole is arranged at the opening of the second groove and is communicated with the opening of the second groove, the diameter of the foot nail hole is smaller than the depth and width of the second groove, and a second rotating shaft is rotatably connected to the opposite side walls of the second groove along a plane perpendicular to the first hook, two second rotating shafts are provided, which are respectively arranged on both sides of the foot nail hole, and a first stopper and a second stopper are respectively fixedly connected to the two second rotating shafts, the shortest distance between the first stopper and the second stopper is greater than 0 and smaller than the diameter of the foot nail, and the first stopper and the second stopper can rotate in the space of the second groove through the opening of the second groove, the first stopper and the second stopper are approached to each other by a magnetic driving mechanism, and the magnetic driving mechanism can also make the first stopper and the second stopper rotate in the space of the second groove from the bottom of the second groove along the corresponding side wall toward the opening direction of the second groove, so that the first stopper and the second stopper are finally approached to each other.

[0013] As an optimization, the magnetic drive mechanism includes a first magnetic block and a second magnetic block, respectively arranged on a first side surface and a second side surface opposite to the first stop block, a third magnetic block and a fourth magnetic block, respectively arranged on a third side surface and a fourth side surface opposite to the second stop block, and a first magnetic zone and a second magnetic zone, respectively arranged on opposite side walls of the second groove, wherein the first side surface and the third side surface are both downwardly curved arc surfaces, the first magnetic block is arranged at one end close to the second stop block, the third magnetic block is arranged at one end close to the first stop block, the second magnetic block covers the second side surface, and the third magnetic block covers the fourth side surface, wherein the first magnetic block, the fourth magnetic block, and the second magnetic zone have the same polarity, the second magnetic block, the third magnetic block, and the first magnetic zone have the same polarity, and the first magnetic block and the second magnetic block have different polarities.

[0014] As an optimization, along the direction from the bottom wall of the second groove to the opening of the second groove, the magnetism of the first magnetic region is enhanced.

[0015] As an optimization, along the direction from the bottom wall of the second groove to the opening of the second groove, the magnetism of the second magnetic region is enhanced.

[0016] As an optimization, a first anti-slip pad is provided at the opening of the second groove of the foot nail hole.

[0017] As an optimization, a second anti-slip pad is provided on the first side of the first stopper.

[0018] As an optimization, a third anti-slip pad is provided on the third side of the second stopper.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] The present invention has low cost and strong versatility, and adopts different anti-falling schemes for two different tower types of power transmission lines, effectively ensuring that workers on the towers do not lose protection during the process of climbing and descending the towers, thereby ensuring the safety of the workers throughout the entire operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 It is a cross-sectional view of a combined fall prevention device according to the present invention;

[0023] Figure 2 for Figure 1 A is an enlarged schematic diagram;

[0024] Figure 3 The movement of the first and second stops when the foot pegs are installed

[0025] Figure 4 is a schematic diagram of the second stopper being installed on the gripping portion;

[0026] Figure 5 is a schematic diagram of the installation position of the first anti-slip mat;

[0027] Figure 6 A side view of the anti-fall device of the present invention installed on a foot spike;

[0028] Figure 7 A schematic diagram of installing the anti-fall device of the present invention on a foot spike;

[0029] Figure 8 It is a schematic diagram of installing the anti-falling device of the present invention on the horizontal rod of the ladder.

[0030] Marks and corresponding parts names in the attached drawings:

[0031] 1-holding part, 11-first groove, 12-first rotating shaft, 13-torsion spring, 14-fixing block, 15-universal ball, 16-foot nail, 2-rope connection part, 3-fixing part, 31-first hook, 32-second hook, 33-accommodating hole, 3a-first magnetic area, 3b-second magnetic area, 4-second groove, 5-second rotating shaft, 51-first stop block, 52-second stop block, 6a-first magnetic block, 6b-second magnetic block, 6c-third magnetic block, 6d-fourth magnetic block, 7-second anti-slip pad, 8-third anti-slip pad, 9-first anti-slip pad. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0033] Example

[0034] A combined fall prevention device, comprising:

[0035] Grip 1;

[0036] The rope loop connecting part 2 is fixedly arranged at the first end of the gripping part 1. Figure 1 The lower end of the rope is used to connect with the safety rope tied to the staff; the rope connection part 2 is provided with an annular hole, such as Figure 1 ,6 As shown, a safety buckle that can be opened and buckled is fixedly connected to the safety rope. The safety buckle is installed in the annular hole, so that the safety rope can be connected to the rope loop connecting part 2.

[0037] The fixing portion 3 is arranged at the second end of the holding portion 1, and includes a first hook 31 and a second hook 32. The first hook 31 is fixedly connected to the first side of the second end of the holding portion 1, and the second hook 32 is rotatably connected to the second side of the second end of the holding portion 1. The first hook 31, the second hook 32 and the holding portion 1 form a receiving hole 33 that can accommodate the horizontal rod of the ladder, and the second hook 32 is located on the inner side of the first hook 31. In the absence of external force, the outer wall of the second hook 32 is partially in contact with the inner wall of the first hook 31; the inner wall of the first hook 31 is provided with a foot nail hole for connecting to the foot nail 16 fixed on the transmission tower at one end away from the holding portion 1, and the diameter of the foot nail hole is larger than the diameter of the cross section of the foot nail 16.

[0038] Here, the area of ​​the accommodating hole 33 is much larger than the cross-sectional area of ​​the horizontal rod of the ladder. When the anti-fall device is to be hung on the horizontal rod, the second hook 32 can be rotated away from the first hook 31 with force to increase the distance between the second hook 32 and the first hook 31, and the horizontal rod can enter the accommodating hole 33 through the distance. After the horizontal rod enters the accommodating hole 33, the force applied to the second hook 32 is cancelled. Since the second hook 32 is located on the inner side of the first hook 31 without the action of external force, the outer wall of the second hook 32 is partially in contact with the inner wall of the first hook 31. Therefore, the second hook 32 will automatically rebound to the initial position and contact the first hook 31, so that the accommodating hole 33 is called a closed hole, ensuring that the horizontal rod will not slip out of the accommodating hole 33, and the foot nail hole can be connected to the foot nail 16 on the transmission tower. Therefore, the anti-fall device can be suitable for two different vertical devices (steel pipe poles and cement poles with ladders and transmission towers with foot nails 16) at the same time.

[0039] In this embodiment, Figure 4 As shown, the second side of the second end of the holding portion 1 is recessed with a first groove 11 in the direction close to the rope loop connecting portion 2, and a first rotating shaft 12 is rotatably connected to the side wall of the first groove 11, and the second hook 32 is fixedly connected to the first rotating shaft 12, and two first baffles are relatively arranged at the opening of the first groove 11 on both adjacent sides of the rotation direction of the second hook 32, and a torsion spring 13 is fixedly sleeved on the first rotating shaft 12, and the two ends of the torsion spring 13 are respectively fixedly connected to the side of the first baffle facing the first groove 11 and the bottom of the first groove 11.

[0040] In this way, by providing the torsion spring 13, after the second baffle is rotated in a direction away from the first baffle under the action of external force, the second baffle can be rotated in a direction close to the first baffle without the action of external force.

[0041] More specifically, the side walls of the first groove 11 extending from both sides of the first rotating shaft 12 are respectively fixedly connected with fixed blocks 14, and a side of the fixed block 14 close to the side wall of the first groove 11 is fixedly connected with a plurality of universal beads 15, and the plurality of universal beads 15 are arranged around the first rotating shaft 12, and the balls of the universal beads 15 are in contact with the gripping part 1.

[0042] In this way, since the first rotating shaft 12 rotates relative to the side wall of the first groove 11, the first rotating shaft 12 and the first groove 11 will move relative to each other. After the first rotating shaft 12 rotates multiple times, the first rotating shaft 12 will be worn. Figure 1 By providing the fixing block 14 and the universal ball 15, the first rotating shaft 12 can be prevented from sliding left and right even if the first rotating shaft 12 is worn.

[0043] Next, another structure is introduced, such as Figure 2 , 3 shown.

[0044] A foot nail hole is provided at one end of the inner wall of the first hook 31 away from the holding part 1 (the diameter of the foot nail hole and the opening distance of the foot nail hole are smaller than the diameter of the horizontal rod of the ladder, and the horizontal rod will only enter the accommodating hole but not the foot nail hole), and the diameter of the foot nail hole is larger than the diameter of the cross section of the foot nail 16, so that the foot nail 16 can directly pass through the foot nail hole, so that the anti-fall device is hung on the foot nail 16.

[0045] The inner side wall of the first hook 31 is provided with a second groove 4 at one end away from the gripping portion 1, and the foot nail hole penetrates the side wall of the second groove 4. That is, the foot nail hole is actually opened on two opposite side walls of the second groove 4. Specifically, the foot nail hole is set at the opening of the second groove 4 and communicates with the opening of the second groove 4. The diameter of the foot nail hole is smaller than the depth and width of the second groove 4. Here, the depth and width of the second groove 4 refer to the second groove 4 at the Figure 1 The length in the up-down direction and the length in the left-right direction, a part of the opening of the second groove 4 is a foot nail hole, and the opening length of the foot nail hole is greater than the diameter of the foot nail.

[0046] The second rotating shaft 5 is rotatably connected to the opposite side walls of the second groove 4 passing through a plane perpendicular to the first hook 31. Two second rotating shafts 5 are provided, which are respectively arranged on both sides of the foot nail hole, and the first stopper 51 and the second stopper 52 are respectively fixedly connected to the two second rotating shafts 5. The shortest distance between the first stopper 51 and the second stopper 52 is greater than 0 and less than the diameter of the foot nail. This means that the first stopper 51 and the second stopper 52 can contact each other but do not hinder the first stopper 51 and the second stopper 52 from rotating separately.

[0047] The first stopper 51 and the second stopper 52 can rotate in the space of the second groove 4 through the opening of the second groove 4, and the first stopper 51 and the second stopper 52 are brought close to each other through the magnetic driving mechanism. The magnetic driving mechanism can also make the first stopper 51 and the second stopper 52 rotate in the space of the second groove 4 from the bottom of the second groove 4 along the corresponding side walls toward the opening direction of the second groove 4, so that the first stopper 51 and the second stopper 52 are finally brought close to each other.

[0048] In the absence of any force other than the magnetic driving mechanism, the first stopper 51 and the second stopper 52 are in contact. When the foot nail 16 is moved upward from the receiving hole 33 into the foot nail hole, the foot nail 16 will contact the first stopper 51 and the second stopper 52. The foot nail 16 continues to move toward the top of the foot nail hole. The first stopper 51 and the second stopper 52 will be pushed into the space of the second groove 4 by the foot nail 16. Since the magnetic driving mechanism can also make the first stopper 51 and the second stopper 52 rotate in the space of the second groove 4 (in the figure, the first stopper 51 rotates counterclockwise). Rotate, the second stopper 52 rotates clockwise), and finally the first stopper 51 and the second stopper 52 are close to each other. At this time, the first stopper 51 and the second stopper 52 are located below the foot nail 16. Under the action of the magnetic driving mechanism, the first stopper 51 and the second stopper 52 are close to each other, and because the shortest distance between the first stopper 51 and the second stopper 52 is greater than 0 and smaller than the diameter of the foot nail, the foot nail here refers to the thinnest foot nail, that is, the shortest distance between the first stopper 51 and the second stopper 52 is smaller than the diameter of the foot nail with the smallest cross-section.

[0049] , so that the first stopper 51 and the second stopper 52 will contact the foot nail 16, which will give the foot nail 16 an upward force, making the foot nail 16 more firmly in contact with the foot nail hole.

[0050] The magnetic drive mechanism has two functions. The first is to allow the first and second stops to rotate to the bottom of the foot spike after the foot spike enters the foot spike hole from below the first and second stops;

[0051] The second function is to allow the first stopper and the second stopper to give the foot peg an upward force respectively, so that the foot peg is always in close contact with the top of the foot peg hole;

[0052] Since the first block and the second block have no contact with the side wall of the second groove, the magnetic drive mechanism will not cause mechanical wear, thereby causing the upward force of the first block and the second block to drive the foot nail to become smaller; and even if the anti-slip pad is deformed due to excessive use of the anti-fall device, the foot nail will be in close contact with the first anti-slip pad, the second anti-slip pad, and the third anti-slip pad. This is because as the anti-slip pad is deformed and becomes thinner, the second magnetic block of the first block and the fourth magnetic block of the second block are respectively displaced upward by the repulsive forces of the first magnetic zone and the second magnetic zone, so that the first block and the second block are still in close contact with the foot nail.

[0053] In this embodiment, the magnetic drive mechanism includes a first magnetic block 6a and a second magnetic block 6b, respectively arranged on the first side and the second side opposite to the first stopper 51, a third magnetic block 6c and a fourth magnetic block 6d, respectively arranged on the third side and the fourth side opposite to the second stopper 52, and a first magnetic area 3a and a second magnetic area 3b, respectively arranged on the opposite side walls of the second groove 4, the first side and the third side are both downwardly curved arc surfaces, the first magnetic block 6a is arranged at an end close to the second stopper 52, the third magnetic block 6c is arranged at an end close to the first stopper 51, the second magnetic block 6b covers the second side, and the third magnetic block 6c covers the fourth side, wherein the first magnetic block 6a, the fourth magnetic block 6d, and the second magnetic area 3b have the same polarity, the second magnetic block 6b, the third magnetic block 6c, and the first magnetic area 3a have the same polarity, and the first magnetic block 6a and the second magnetic block 6b have different polarities.

[0054] Thus, when the first stopper 51 enters the space of the second groove 4, the first side surface of the first stopper 51 faces the side wall of the second groove 4. Figure 1As shown, the first side surface is directly opposite to the left side wall of the second groove 4. Since the side wall of the second groove 4 is provided with a first magnetic region 3a having a different magnetic property from that of the first stopper 51, and since the first magnetic block 6a is provided at the end of the first side surface close to the second stopper 52, the first magnetic block 6a will be attracted by the first magnetic region 3a and move closer to the first magnetic region 3a, thereby driving the first stopper 51 to rotate. Since the magnetism of the first magnetic region 3a is enhanced, the first magnetic block 6a will rotate in the direction of the magnetism enhancement of the first magnetic region 3a. At the same time, when the first stopper 51 is rotated, the magnetism of the first magnetic region 3a is enhanced. When the block 51 rotates to a certain position, the second magnetic block 6b on the second side is subjected to the repulsive force of the first magnetic region 3a, which accelerates the counterclockwise rotation speed of the first stopper 51. Finally, the second side will face the left side wall of the second groove 4. The first magnetic region 3a gives the second magnetic block 6b (equivalent to the first stopper 51) a repulsive force. Since the foot nail 16 blocks the first stopper 51 above the first stopper 51, the repulsive force of the first magnetic region 3a on the first stopper 51 will be transmitted to the foot nail 16, so that the contact between the foot nail 16 and the foot nail hole is more stable.

[0055] The principle of the second stopper 52 is the same as that of the first stopper 51, and will not be described in detail here.

[0056] The first side surface and the third side surface are both configured as downwardly curved arc surfaces, so that the minimum distance between the first stopper 51, the second stopper 52 and the bottom of the foot nail hole can be reduced, so that the foot nail hole can accommodate foot nails 16 of more sizes.

[0057] like Figure 2 , 5 As shown, a first anti-slip pad 9 is provided at the opening of the second groove 4 of the foot nail hole (the first anti-slip pad is next to the opening), a second anti-slip pad 7 is provided on the first side of the first stop block 51, and a third anti-slip pad 8 is provided on the third side of the second stop block 52.

[0058] The second anti-slip pad and the third anti-slip pad in the figure are not covered on the first magnetic block and the third magnetic block. Of course, the second anti-slip pad and the third anti-slip pad can also be covered on the first magnetic block and the third magnetic block respectively, so that smaller-sized foot spikes can contact the second anti-slip pad and the third anti-slip pad.

[0059] By correspondingly arranging the anti-skid pad, the friction between the foot spike 16 and the foot spike hole, the first stopper 51 and the second stopper 52 can be increased, so that the contact between the foot spike 16 and the foot spike hole is more stable.

[0060] When it is necessary to remove the foot nail 16, the anti-fall device is lifted upward, and the foot nail 16 gives a downward force to the first stop block 51 and the second stop block 52, and the first stop block 51 and the second stop block 52 rotate clockwise and counterclockwise respectively. After the foot nail 16 is disengaged from the foot nail hole, the first stop block 51 and the second stop block 52 rotate counterclockwise and clockwise respectively under the action of the first magnetic area 3a and the second magnetic area 3b. Finally, the first stop block 51 and the second stop block 52 reach equilibrium in the foot nail hole under the action of the attractive magnetic force of the first magnetic block 6a and the second magnetic block 6b (at this time, the second side surface and the fourth side surface face downward or diagonally downward, and will not be affected or will be affected very little by the first magnetic area 3a and the second magnetic area 3b. The magnetic force between the first magnetic block 6a and the second magnetic block 6b is mainly the magnetic force between the first magnetic block 6a and the second magnetic block 6b).

[0061] Figure 7 This is a schematic diagram of installing the anti-fall device of the present invention on the foot nails. Figure 8 It is a schematic diagram of installing the anti-falling device of the present invention on the horizontal rod of the ladder.

[0062] It should be noted that the bottom wall / bottom of the groove is arranged relative to the opening of the groove, and is not in the up and down direction in the figure.

[0063] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A combined fall prevention device, used for safety protection when climbing a vertical device before high-altitude work is required, characterized in that: include: Grip part; A rope loop connecting portion, fixedly arranged at the first end of the gripping portion, and used to be connected to a safety rope tied to the worker; The fixing part is arranged at the second end of the holding part, and comprises a first hook and a second hook, wherein the first hook is fixedly connected to the first side of the second end of the holding part, and the second hook is rotatably connected to the second side of the second end of the holding part, and the first hook, the second hook and the holding part form a receiving hole that can receive the horizontal rod of the ladder, and the second hook is located on the inner side of the first hook, and in the absence of external force, the outer side wall of the second hook is partially in contact with the inner side wall of the first hook; a foot nail hole for connecting with a foot nail fixed on the transmission tower is installed at one end of the inner side wall of the first hook away from the holding part, and the diameter of the foot nail hole is larger than the diameter of the cross section of the foot nail; A foot nail hole is provided at one end of the inner side wall of the first hook away from the holding portion, and a second groove is recessed in the direction away from the holding portion at one end of the inner side wall of the first hook away from the holding portion, and the foot nail hole passes through the side wall of the second groove, the foot nail hole is arranged at the opening of the second groove and communicated with the opening of the second groove, the diameter of the foot nail hole is smaller than the depth and width of the second groove, and a second rotating shaft is rotatably connected to the opposite side walls of the second groove along a plane perpendicular to the first hook, two second rotating shafts are provided, which are respectively arranged on both sides of the foot nail hole, and a first stopper and a second stopper are respectively fixedly connected to the two second rotating shafts, the shortest distance between the first stopper and the second stopper is greater than 0 and smaller than the diameter of the foot nail, and the first stopper and the second stopper can rotate in the space of the second groove through the opening of the second groove, the first stopper and the second stopper are approached to each other through a magnetic driving mechanism, and the magnetic driving mechanism can also make the first stopper and the second stopper rotate in the space of the second groove from the bottom of the second groove along the corresponding side wall toward the opening direction of the second groove, so that the first stopper and the second stopper are finally approached to each other.

2. A combined fall prevention device according to claim 1, characterized in that: The second side of the second end of the holding portion is recessed with a first groove in the direction close to the rope loop connecting portion, and a first rotating shaft is rotatably connected to the side wall of the first groove. The second hook is fixedly connected to the first rotating shaft, and two first baffles are relatively arranged at the openings of the first groove on both adjacent sides of the rotation direction of the second hook. A torsion spring is fixedly sleeved on the first rotating shaft, and two ends of the torsion spring are respectively fixedly connected to a side of the first baffle facing the first groove and a bottom of the first groove.

3. A combined fall prevention device according to claim 2, characterized in that: The side walls of the first groove extending from both sides of the first rotating shaft are respectively fixedly connected with fixed blocks, and a side of the fixed block close to the side wall of the first groove is fixedly connected with a plurality of universal beads, and the plurality of universal beads are arranged around the first rotating shaft, and the balls of the universal balls are in contact with the gripping portion.

4. A combined fall prevention device according to claim 1, characterized in that: The magnetic drive mechanism includes a first magnetic block and a second magnetic block, respectively arranged on a first side surface and a second side surface opposite to the first stopper, a third magnetic block and a fourth magnetic block, respectively arranged on a third side surface and a fourth side surface opposite to the second stopper, and a first magnetic zone and a second magnetic zone, respectively arranged on opposite side walls of the second groove, wherein the first side surface and the third side surface are both downwardly curved arc surfaces, the first magnetic block is arranged at an end close to the second stopper, the third magnetic block is arranged at an end close to the first stopper, the second magnetic block covers the second side surface, and the third magnetic block covers the fourth side surface, wherein the first magnetic block, the fourth magnetic block, and the second magnetic zone have the same polarity, the second magnetic block, the third magnetic block, and the first magnetic zone have the same polarity, and the first magnetic block and the second magnetic block have different polarities.

5. A combined fall prevention device according to claim 4, characterized in that: Along the direction from the bottom wall of the second groove to the opening of the second groove, the magnetism of the first magnetic region is enhanced.

6. A combined fall prevention device according to claim 5, characterized in that: Along the direction from the bottom wall of the second groove to the opening of the second groove, the magnetism of the second magnetic region is enhanced.

7. A combined fall prevention device according to claim 1, characterized in that: A first anti-slip pad is arranged at the opening of the second groove of the foot nail hole.

8. The combined fall prevention device according to claim 1, characterized in that: A second anti-slip pad is disposed on the first side surface of the first stopper.

9. The combined fall prevention device according to claim 1, characterized in that: A third anti-slip pad is disposed on the third side surface of the second stopper.

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