Net bag type high-altitude operation anti-falling device

Abstract

The net bag type high-altitude operation anti-falling device comprises a first movable telescopic frame and a second movable telescopic frame, a net pulling assembly is arranged on the first movable telescopic frame, the net pulling assembly comprises a net pulling frame, a plurality of second limiting hooks are installed on the net pulling frame at equal intervals, and a net releasing assembly is arranged on the first movable telescopic frame. The net releasing assembly comprises a net releasing frame, a limiting roller is rotationally installed on the net releasing frame, a plurality of first limiting hooks are fixedly connected to the limiting roller, a net winding roller is rotationally arranged on the outer side of the limiting roller, a plurality of elastic hook assemblies with the turnover angles are installed on the net pulling frame and the net releasing frame at equal intervals, and each elastic hook assembly comprises a plurality of clamping hooks capable of being restored in a damping mode. According to the design, rigid contact of the first limiting hook and the second limiting hook to the net bag can be changed into elastic contact of the elastic hook assembly to the net bag, when the net bag is unfolded by any length, the elasticity of the net bag can be effectively improved, and the life safety of personnel is further protected.

Description

Technical Field

[0001] The present invention relates to the technical field of preventing high-altitude falling, in particular to a net bag type high-altitude operation anti-falling device. Background Art

[0002] A high-altitude fall prevention net is a safety protection device designed specifically to prevent people or objects from falling from heights. It is widely used in high-altitude work scenarios such as construction, bridges, tower cranes, and high-altitude cleaning. It is usually woven from high-strength fiber materials (such as nylon, polyester) or stainless steel wire ropes. It has the characteristics of wear resistance, aging resistance, and strong load-bearing capacity. It can withstand the weight and impact of falling human bodies and items such as carried tools.

[0003] In some existing high-altitude rescue or high-altitude cleaning operations, emergency rescue equipment is rarely installed on the ground. During the high-altitude rescue process, inflatable cushions are often laid on the ground to prevent relevant personnel from falling from high altitudes and causing danger. However, the effective rescue height of the life-saving air cushion is usually no more than 16 meters. Beyond this range, the impact force of the fall may exceed the cushion's bearing limit, or the cushion may deform and cause personnel to slip, which will aggravate the injury. Secondly, the laying of the air cushion requires special operation, the inflation process takes a long time, and continuous air supply is required to maintain expansion. The use process has limitations. Therefore, in order to solve the above problems, a net bag type high-altitude operation anti-fall device is proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a net bag type high-altitude work anti-fall device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A net bag type anti-fall device for high-altitude work, comprising a first movable telescopic frame and a second movable telescopic frame, wherein the first movable telescopic frame is provided with a net pulling assembly, the net pulling assembly comprises a net pulling frame, a plurality of second limiting hooks are equidistantly installed on the net pulling frame, and the second limiting hooks are used to pull the limiting net bag; The first movable telescopic frame is provided with a net-releasing assembly, which includes a net-releasing frame, a limit roller is rotatably installed on the net-releasing frame, a plurality of first limit hooks are fixedly connected to the limit roller, a net-winding roller is rotatably provided on the outer side of the limit roller, and a plurality of angle-reversible spring hook assemblies are equidistantly installed on the net-pulling frame and the net-releasing frame, the first limit hook is used to limit the position of the net bag, and the net-winding roller is used to wind up the net bag; The spring hook assembly includes a plurality of hooks capable of damping recovery, and the hooks are used to provide damping force to the net bag.

[0006] The above technical solution further includes: The net pulling assembly also includes a first hook changing motor and a unhooking motor fixedly mounted on the outside of the net pulling frame. The net pulling frame is fixedly connected to the top of the first movable telescopic frame. The inner side of the net pulling frame is rotatably connected to a fixed roller. The output end of the unhooking motor is fixedly connected to the fixed roller. A plurality of the second limiting hooks are equidistantly fixedly connected to the outside of the fixed roller. The output end of the first hook changing motor is fixedly connected to a first mounting shaft rotatably connected to the net pulling frame.

[0007] The net-releasing assembly also includes a limiting motor installed on the outside of the net-releasing frame, the output end of the limiting motor is fixedly connected to a transmission rod, the outside of the transmission rod is fixedly connected to a limiting roller, and multiple first limiting hooks are equidistantly distributed on the outside of the limiting roller.

[0008] The side of the net-releasing frame close to the limit motor is fixedly connected to the net-collecting motor, and the net-collecting motor is located on the top of the limit motor. The output end of the net-collecting motor is fixedly connected to a driving gear, and the outer side of the driving gear is engaged with a driven gear fixedly connected to the net-winding roller. The driven gear is rotatably connected to the driven gear, and the end of the net-winding roller away from the driven gear is rotatably connected to the limit roller.

[0009] The side of the grid frame close to the limit motor is also fixedly connected to a plywood motor, the output end of the plywood motor is fixedly connected to a transmission shaft, the outer side of the transmission shaft is symmetrically fixedly installed with a plywood gear, the plywood gear is meshed with a plywood ring gear, and a plywood is fixedly connected between the two plywood ring gears.

[0010] Annular mounting grooves are symmetrically fixedly connected to the inner side wall of the grid frame, and fixed fan plates are fixed on the inner sides of the two annular mounting grooves. The two annular mounting grooves slide relative to the cladding plate, and the fixed fan plates are slidably arranged on the inner side of the cladding plate.

[0011] A second hook-changing motor is also installed on the side of the net-releasing frame close to the limiting motor. The output end of the second hook-changing motor is fixedly connected to a second mounting shaft that is rotatably connected to the net-releasing frame. A plurality of spring hook assemblies are also installed on the second mounting shaft.

[0012] The spring hook assembly also includes a mounting base equidistantly fixedly connected to the second mounting shaft and the first mounting shaft, a fixing cylinder fixedly connected to the outer side of the mounting base, a damping telescopic rod installed on the inner side of the fixing cylinder, the telescopic end of the damping telescopic rod fixedly connected to a connecting plate fixed with a hook, a spring fixedly connected between the connecting plate and the mounting base, and the connecting plate slides relative to the inner side wall of the fixing cylinder.

[0013] The present invention has the following beneficial effects: In the present invention, the first movable telescopic frame and the second movable telescopic frame can be deployed quickly, the net bag is restricted by the limiting roller, and the winding and releasing of the net bag are realized through the net roller design. The relative position movement of the fixed fan plate and the covering plate can realize the size of the opening between the fan plate and the covering plate, which facilitates the installation and disassembly of the net bag.

[0014] In the present invention, the rigid contact of the first limiting hook and the second limiting hook with the net bag can be changed to the elastic contact of the spring hook assembly with the net bag. When the net bag is unfolded to any length, the elastic force of the net bag itself can be effectively improved, thereby further protecting the lives of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a net bag type high-altitude work anti-fall device proposed by the present invention from a first side view; Figure 2 This is a second side view schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic structural diagram of the net-pulling assembly in the present invention; Figure 4 Schematic diagram of the structure of the net-laying assembly in the present invention; Figure 5 Schematic diagram of the inner structure of the cladding plate and the fixed fan plate in the present invention; Figure 6 Schematic diagram of the structure of the cladding plate and the fixed fan plate in the present invention; Figure 7 Schematic diagram of the inner structure of the mesh roller in the present invention; Figure 8 Schematic diagram of the inner structure of the mesh roller in the present invention Figure 9 Schematic diagram of the grid structure in the present invention; Figure 10 for Figure 3 A magnified schematic diagram of the structure in the middle.

[0016] In the figure: 1. first movable telescopic frame; 10. second movable telescopic frame; 2. net pulling frame; 3. net placing frame; 4. fixed cylinder; 20. first hook changing motor; 21. first mounting shaft; 22. fixed roller; 23. second limit hook; 24. hook unhooking motor; 30. closing plate motor; 31. limit motor; 32. net collecting motor; 33. second hook changing motor; 34. fixed fan plate; 35. annular mounting groove; 36. transmission shaft; 37. closing plate gear; 38. closing plate ring gear; 39. closing plate; 310. second mounting shaft; 311. driving gear; 312. driven gear; 313. net winding roller; 314. limit roller; 315. transmission rod; 316. first limit hook; 40. mounting seat; 41. hook; 42. damping telescopic rod; 43. spring; 44. connecting plate; DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example like Figures 1-10 As shown, the present invention proposes a net bag type aerial work anti-fall device, comprising a first movable telescopic frame 1 and a second movable telescopic frame 10. The first movable telescopic frame 1 is provided with a net pulling assembly, which includes a net pulling frame 2. The net pulling frame 2 is evenly installed with a plurality of second limiting hooks 23, and the second limiting hooks 23 are used to pull the limiting net bag; The first movable telescopic frame 1 is provided with a net-releasing assembly, which includes a net-releasing frame 3, on which a limit roller 314 is rotatably installed, and a plurality of first limit hooks 316 are fixedly connected to the limit roller 314, and a net-winding roller 313 is rotatably provided on the outer side of the limit roller 314. Multiple angle-reversible spring hook assemblies are equidistantly installed on the net-pulling frame 2 and the net-releasing frame 3, the first limit hooks 316 are used to limit the net bag, and the net-winding roller 313 is used to rewind the net bag; The spring hook assembly includes a plurality of hooks 41 capable of damping and returning, and the hooks 41 are used to provide damping force for the net bag; Furthermore, when installing the net bag, the net ring installed on the net bag is hooked by the first limiting hook 316, and then the limiting roller 314 is driven to rotate, driving the multiple first limiting hooks 316 to flip clockwise to the bottom of the limiting roller 314, so that the net bag is restricted on the first limiting hook 316, and then the net rolling roller 313 is driven to roll the net bag thereon. After rolling the net bag again, the net ring on the end of the net bag is put on the second limiting hook 23 and the hook 41 of the spring hook assembly on the net pulling frame 2, and the second limiting hook 23 is driven to flip, so that the end of the net bag is restricted on the second limiting hook 23. Furthermore, in the process of releasing the net bag, the first movable telescopic frame 1 is moved, and the net roller 313 is driven to flip over, so that the net bag is released from the net roller 313. After it is released to a certain extent, the second limit hook 23 is driven to flip over, so that the net ring on the net bag falls off from the second limit hook 23. At this time, the hook 41 on the first mounting shaft 21 still keeps the restriction on the end of the net bag. Then, by flipping the spring hook assembly on the net rack 3, the hook 41 on the net rack 3 limits the net bag at this time. In this way, no matter how long the net bag is pulled, an elastic restoring force can be applied to both sides of the net bag.

[0019] like Figure 4 and Figure 8 As shown, the net pulling assembly also includes a first hook changing motor 20 and a hook unhooking motor 24 fixedly mounted on the outside of the net pulling frame 2, the net pulling frame 2 is fixedly connected to the top of the first movable telescopic frame 1, the inner side of the net pulling frame 2 is rotatably connected to a fixed roller 22, the output end of the hook unhooking motor 24 is fixedly connected to the fixed roller 22, a plurality of second limit hooks 23 are equidistantly fixedly connected to the outside of the fixed roller 22, and the output end of the first hook changing motor 20 is fixedly connected to a first mounting shaft 21 rotatably connected to the net pulling frame 2; Furthermore, the net-pulling frame 2 is fixed to the top of the first movable telescopic frame 1. When the end of the net bag needs to be fixed, the operator first puts the net ring at the end of the net bag into the second limit hook 23, and then starts the unhooking motor 24, and its output end drives the fixed roller 22 to rotate counterclockwise (refer to Figure 8 ), at this time the second limit hook 23 rotates synchronously with the fixed roller 22, the hook body turns toward the inside of the net frame 2, and the net ring is limited to the outside of the fixed roller 22 to prevent the net bag from falling off when subjected to force; Furthermore, when the end of the net bag needs to be released during the net releasing process, the unhooking motor 24 drives the fixed roller 22 to rotate counterclockwise in reverse, and the second limit hook 23 flips outward, and the hook mouth opens to automatically detach the net ring. At this time, the end of the net bag is still provided with elastic restraint force by the spring hook assembly on the first mounting shaft 21, ensuring that the net bag is continuously in a tensioned state.

[0020] like Figure 4-Figure 5 As shown, the net-laying assembly further includes a limit motor 31 mounted on the outside of the net frame 3, the output end of the limit motor 31 is fixedly connected to a transmission rod 315, the outer side of the transmission rod 315 is fixedly connected to a limit roller 314, and a plurality of first limit hooks 316 are equidistantly distributed on the outer side of the limit roller 314; A net collecting motor 32 is fixedly connected to one side of the net rack 3 near the limit motor 31. The net collecting motor 32 is located on the top of the limit motor 31. The output end of the net collecting motor 32 is fixedly connected to a driving gear 311. The outer side of the driving gear 311 is engaged with a driven gear 312 fixedly connected to a net roller 313. The driven gear 312 is rotatably connected to the driven gear 312. The end of the net roller 313 away from the driven gear 312 is rotatably connected to the limit roller 314. Furthermore, when installing the net bag, the net ring at the head end of the net bag is put on the first limiting hook 316, which acts as the limiting motor 31, and the output end drives the transmission rod 315 to rotate, thereby driving the limiting roller 314 fixedly connected thereto to rotate synchronously. At this time, the first limiting hooks 316 equidistantly distributed on the outside of the limiting roller 314 rotate with the roller body to a preset angle and flip clockwise (such as Figure 5 As shown), the first limiting hook 316 is flipped to the bottom of the limiting roller 314 (the hook opening faces inward), and the mechanical locking structure is used to prevent the mesh ring from falling off; Furthermore, at the same time, the net-collecting motor 32 is started, and the driving gear 311 at its output end is meshed with the driven gear 312 fixed at the end of the net-winding roller 313 for transmission. The net-winding roller 313 rotates around its own axis under the drive of the driven gear 312, and the net bag restricted on the first limiting hook 316 is evenly wound up on the outside of the roller body; when the net needs to be released, the net-collecting motor 32 drives the driving gear 311 in the reverse direction, and drives the net-winding roller 313 to reverse through the driven gear 312, and the net bag is unfolded from the roller body under the action of its own gravity and tension. In addition, the surface of the net-winding roller 313 adopts an anti-slip texture design, and the first limiting hook 316 is embedded with a rubber gasket on the outside of the hook body, which not only increases the friction to prevent the net ring from sliding, but also avoids the wear of the net bag caused by direct metal contact, thereby improving the service life and operational reliability of the equipment; like Figure 6-Figure 8 As shown, a plywood motor 30 is fixedly connected to one side of the grid frame 3 near the limit motor 31, and a transmission shaft 36 is fixedly connected to the output end of the plywood motor 30. A plywood gear 37 is symmetrically fixedly installed on the outer side of the transmission shaft 36. A plywood ring gear 38 is meshed on the plywood gear 37, and a plywood cover 39 is fixedly connected between the two plywood ring gears 38. Annular mounting grooves 35 are symmetrically fixedly connected to the inner wall of the grid frame 3. Fixed fan plates 34 are fixed to the inner sides of the two annular mounting grooves 35. The two annular mounting grooves 35 slide relative to the cladding plate 39. The fixed fan plates 34 are slidably arranged on the inner side of the cladding plate 39. A second hook-changing motor 33 is further installed on one side of the net-laying frame 3 near the limit motor 31. The output end of the second hook-changing motor 33 is fixedly connected to a second mounting shaft 310 rotatably connected to the net-laying frame 3. A plurality of spring hook assemblies are also installed on the second mounting shaft 310. Furthermore, when the head end of the net bag is put on the first limit hook 316, it is necessary to enlarge the opening between the fixed fan plate 34 and the cladding plate 39 to facilitate the staff to put on the net ring. By starting the cladding motor 30, its output end drives the transmission shaft 36 to rotate, and then drives the cladding gear 37 symmetrically installed on the outside of the transmission shaft 36 to rotate synchronously; the cladding gear 37 is meshed with the cladding ring gear 38 fixed at both ends of the cladding plate 39, so that the cladding plate 39 slides along the circumference of the annular mounting groove 35 on the inner wall of the net frame 3; Furthermore, the fixed fan plate 34 passes through the sliding groove inside the cladding plate 39, and the two form a sliding fit. When the cladding plate 39 slides down to the bottom, the opening between the fixed fan plate 34 and the cladding plate 39 is the largest. When the cladding plate 39 rotates counterclockwise (such as Figure 5 As shown), at this time, the opening between the fixed fan plate 34 and the cladding plate 39 gradually becomes smaller, forming a protective cavity to reduce the intrusion of rainwater. At the same time, the cladding plate 39 can contact with the net bag and provide a certain support force during the folding and unfolding of the net bag; Furthermore, when the net bag is deployed at the designated position, the net bag on the net-winding roller 313 will not be fully released. At this time, the second hook-changing motor 33 is started, and its output end drives the second mounting shaft 310 to rotate around its own axis through the coupling. The multiple spring hook assemblies equidistantly mounted on the second mounting shaft 310 rotate synchronously therewith, and their hooks 41 flip toward the net bag until the hooks are inserted into the mesh of the net bag. like Figure 9 As shown, the spring hook assembly further includes a mounting base 40 equidistantly fixedly connected to the second mounting shaft 310 and the first mounting shaft 21. A fixing cylinder 4 is fixedly connected to the outer side of the mounting base 40. A damping telescopic rod 42 is mounted on the inner side of the fixing cylinder 4. The telescopic end of the damping telescopic rod 42 is fixedly connected to a connecting plate 44 fixed to the hook 41. A spring 43 is fixedly connected between the connecting plate 44 and the mounting base 40. The connecting plate 44 slides relative to the inner side wall of the fixing cylinder 4. Furthermore, when the fixing method of the end of the net bag needs to be changed, when the hook 41 on the first mounting shaft 21 is stretched when the net bag is retracted, the hook 41 transmits the pulling force to the damping telescopic rod 42 through the connecting plate 44. The damping telescopic rod 42 (with a built-in high-viscosity silicone oil damping layer) slowly extends under the action of the pulling force, and its telescopic end drives the connecting plate 44 to slide along the inner wall of the fixing tube 4, while stretching the spring 43. The elastic potential energy reserve of the spring 43 and the fluid damping effect of the damping telescopic rod 42 prevent the net bag from being torn or the equipment from being damaged by the instantaneous impact force. In this embodiment, the first movable telescopic frame 1 and the second movable telescopic frame 10 can be deployed quickly. Through the hard contact of the first limit hook 316 and the second limit hook 23 on the net bag, the spring hook assembly is transformed into an elastic contact with the net bag. When the net bag is unfolded to any length, the elastic force of the net bag itself can be effectively improved, further protecting the lives of personnel.

[0021] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A net bag type anti-fall device for high-altitude work, comprising a first movable telescopic frame (1) and a second movable telescopic frame (10), characterized in that: A net-pulling assembly is provided on the first movable telescopic frame (1), the net-pulling assembly comprising a net-pulling frame (2), a plurality of second limiting hooks (23) being equidistantly mounted on the net-pulling frame (2), the second limiting hooks (23) being used to pull the limiting net bag; The first movable telescopic frame (1) is provided with a net-releasing assembly, and the net-releasing assembly includes a net-releasing frame (3), a limiting roller (314) is rotatably installed on the net-releasing frame (3), a plurality of first limiting hooks (316) are fixedly connected to the limiting roller (314), a net-reeling roller (313) is rotatably provided on the outer side of the limiting roller (314), and a plurality of flippable spring hook assemblies are equidistantly installed on the net-pulling frame (2) and the net-releasing frame (3), the first limiting hooks (316) are used for limiting the net bag, and the net-reeling roller (313) is used for reeling the net bag; The spring hook assembly comprises a plurality of hooks (41) capable of damping recovery, and the hooks (41) are used to provide a damping force for the net bag.

2. A net bag type high-altitude work anti-fall device according to claim 1, characterized in that: The net pulling assembly further comprises a first hook changing motor (20) and a hook removing motor (24) fixedly mounted on the outside of the net pulling frame (2); the net pulling frame (2) is fixedly connected to the top of the first movable telescopic frame (1); the inner side of the net pulling frame (2) is rotatably connected to a fixed roller (22); the output end of the hook removing motor (24) is fixedly connected to the fixed roller (22); a plurality of second limit hooks (23) are equidistantly fixedly connected to the outside of the fixed roller (22); the output end of the first hook changing motor (20) is fixedly connected to a first mounting shaft (21) rotatably connected to the net pulling frame (2).

3. A net bag type high-altitude work anti-fall device according to claim 2, characterized in that: The net placing assembly further comprises a limiting motor (31) mounted on the outside of the net placing frame (3); an output end of the limiting motor (31) is fixedly connected to a transmission rod (315); an outer side of the transmission rod (315) is fixedly connected to a limiting roller (314); and a plurality of the first limiting hooks (316) are equidistantly distributed on the outer side of the limiting roller (314).

4. A net bag type high-altitude work anti-fall device according to claim 3, characterized in that: A net collecting motor (32) is fixedly connected to a side of the net placing frame (3) close to the limiting motor (31). The net collecting motor (32) is located on the top of the limiting motor (31). An output end of the net collecting motor (32) is fixedly connected to a driving gear (311). A driven gear (312) fixedly connected to a net rolling roller (313) is engaged on the outer side of the driving gear (311). The driven gear (312) is rotationally connected to the driven gear (312). An end of the net rolling roller (313) away from the driven gear (312) is rotationally connected to the limiting roller (314).

5. A net bag type anti-fall device for high-altitude work according to claim 4, characterized in that: A plywood motor (30) is fixedly connected to one side of the net rack (3) close to the limit motor (31); an output end of the plywood motor (30) is fixedly connected to a transmission shaft (36); a plywood gear (37) is symmetrically fixedly mounted on the outer side of the transmission shaft (36); a plywood ring gear (38) is meshed with the plywood gear (37); and a plywood cover (39) is fixedly connected between the two plywood ring gears (38).

6. A net bag type anti-fall device for aerial work according to claim 5, characterized in that: Annular mounting grooves (35) are symmetrically fixedly connected to the inner side wall of the grid frame (3), and fixed fan plates (34) are fixedly engaged with the inner sides of the two annular mounting grooves (35). The two annular mounting grooves (35) slide relative to the cladding plate (39), and the fixed fan plates (34) are slidably arranged on the inner side of the cladding plate (39).

7. A net bag type anti-fall device for aerial work according to claim 3, characterized in that: A second hook-changing motor (33) is further installed on a side of the net-laying frame (3) close to the limit motor (31); an output end of the second hook-changing motor (33) is fixedly connected to a second mounting shaft (310) rotatably connected to the net-laying frame (3); and a plurality of spring hook assemblies are also installed on the second mounting shaft (310).

8. A net bag type anti-fall device for aerial work according to claim 7, characterized in that: The spring hook assembly further comprises a mounting seat (40) equidistantly fixedly connected to the second mounting shaft (310) and the first mounting shaft (21); a fixing cylinder (4) is fixedly connected to the outer side of the mounting seat (40); a damping telescopic rod (42) is installed on the inner side of the fixing cylinder (4); a telescopic end of the damping telescopic rod (42) is fixedly connected to a connecting plate (44) fixed to the hook (41); a spring (43) is fixedly connected between the connecting plate (44) and the mounting seat (40); and the connecting plate (44) slides relative to the inner side wall of the fixing cylinder (4).

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