Aerial maintenance work use anti-falling device

Abstract

The application relates to the technical field of falling prevention, in particular to a falling prevention device for high-altitude maintenance operation, which comprises two installation rods, support rods are arranged on the side walls of the two installation rods, a safety net is arranged between the two support rods, a plurality of connecting ropes are arranged on the side walls of the two support rods, and the plurality of connecting ropes are connected with the side edges of the safety net. The falling prevention device for high-altitude maintenance operation is cooperatively worked by a plurality of winding drum mechanisms arranged in the support rods and a connecting rope system, the posture of the safety net is intelligently adjusted, when falling is detected, a control system can accurately control the motor and the clutch unit on the side far away from the falling point according to the data of a tension sensor, the corresponding connecting rope is actively unwound, and a net surface form that is inclined to the center is formed. The active adjustment mechanism effectively solves the limitation of passive protection of the traditional falling prevention net, ensures that the falling personnel can smoothly slide to the center position of the net, and greatly reduces the risk of secondary falling.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of anti-falling devices, in particular to an anti-falling device for high-altitude maintenance work. BACKGROUND

[0002] High-altitude work refers to work performed by a person at a position serving as a reference, and the distance from the falling height reference plane is two meters or more than two meters, which is called high-altitude work. In order to prevent workers from falling from a high place and being injured during work, a high-altitude anti-falling device is needed to ensure the safety of workers. The anti-falling net is a commonly used way, but when the anti-falling net receives a falling worker or object, the protective net deforms downward after being impacted, and then the protective net may bounce the falling member or person, so that the construction personnel or member is easily bounced out of the protective net and continues to fall downward.

[0003] In order to solve the above problems, the Chinese patent with the publication number CN113216662B discloses an anti-falling device for building construction, which comprises a mounting base with two pairs of symmetrically arranged support rod frames, a buffer sliding seat corresponding to the number of the support rod frames, the buffer sliding seat being capable of being resetly slid on the lower half of each support rod frame, a support cross bar corresponding to the number of the support rod frames, one end of the support cross bar being hingedly arranged on the middle part of each support rod frame, the inside of the support cross bar being provided with a damping mechanism, an inclined rod corresponding to the number of the support rod frames, the inclined rod being hingedly arranged with the buffer sliding seat and the support cross bar arranged on the same support rod frame, and a bearing net assembly being expansively and movably arranged between the support cross bars and being connected with the damping mechanism of the support cross bar to absorb the impact gravity of a high-altitude falling object.

[0004] However, the device uses a large number of springs as buffer members, and the springs convert kinetic energy into elastic potential energy when impacted. The potential energy is released in the opposite direction after the impact ends. The spring may cause secondary bouncing when releasing energy after compression, increasing the safety hazard. Therefore, the application provides an anti-falling device for high-altitude maintenance work. SUMMARY

[0005] To solve the above technical problems, the application provides an anti-falling device for high-altitude maintenance work, which comprises two mounting rods, support rods arranged on the side walls of the two mounting rods, a safety net arranged between the two support rods, a plurality of connecting ropes arranged on the side walls of the two support rods, the connecting ropes being connected with the side edges of the safety net, a cavity arranged in the support rod, a plurality of winding drums arranged in the cavity, one end of the connecting rope being wound on the winding drum, the other end of the connecting rope being provided with a connecting piece, the connecting ropes on the two sides being connected with each other through the connecting piece, a damping unit being connected with the outer end of the winding drum, a motor being arranged in the cavity, a driving shaft being arranged at the output end of the motor, the winding drum being sleeved on the outer side of the driving shaft, and a clutch unit being arranged on the outer side of the driving shaft.

[0006] In some embodiments, the connecting member comprises a flexible rod, a soft pad is arranged on the top of the flexible rod, a plurality of tension sensors are arranged on both sides of the flexible rod, and the ends of the connecting ropes on both sides are connected with the respective tension sensors.

[0007] In some embodiments, a plurality of support seats are arranged in the cavity, the driving shaft penetrates through the support seats, a plurality of the winding drums are arranged in a linear array outside the driving shaft, and a plurality of clutch units are arranged at positions corresponding to the winding drums on the driving shaft.

[0008] In some embodiments, the damping unit comprises a fixed sleeve arranged in the cavity, a plurality of one-way rollers are arranged at both ends of the winding drum, the outer sides of the one-way rollers abut against the inner side of the fixed sleeve, a connecting ring is arranged at the end of the guide roller away from the winding drum, the plurality of one-way rollers are connected with the connecting ring, a plurality of connecting claws are movably arranged on the connecting ring, and a driving unit for driving the connecting claws to move is arranged on the outer side of the connecting claws.

[0009] In some embodiments, a sliding groove is arranged on the side wall of the winding drum and the connecting ring, a sliding block is slidably arranged in the sliding groove, the rotating shafts of the one-way rollers are connected with the sliding blocks on both sides, respectively, a support spring is connected to the bottom of the sliding block, the other end of the support spring is connected with the inner wall of the sliding groove, and the connecting claws are fixedly arranged on the sliding block on the connecting ring.

[0010] In some embodiments, the driving unit comprises a retaining ring fixedly arranged in the cavity, an elastic telescopic rod is connected with the side wall of the retaining ring, a driving ring is connected to the end of the elastic telescopic rod, an electromagnet and a magnetic plate are arranged on the opposite sides of the retaining ring and the driving ring, respectively, and the electromagnet can repel the magnetic plate when electrified to drive the driving ring to press the connecting claws.

[0011] In some embodiments, the outer diameters of the winding drums are different, and the outer diameters of the winding drums gradually decrease from the middle position of the support rod to the positions on both sides of the support rod.

[0012] In some embodiments, a movable groove is arranged in the inner side of the driving shaft, the clutch unit comprises a friction plate slidably arranged in the movable groove, a reset spring is arranged at the bottom of the friction plate, an electromagnet is arranged in the movable groove, and the friction plate is made of a magnetic material, and the electromagnet repels the friction plate when electrified to drive the friction plate to move and abut against the inner side of the winding drum.

[0013] In some embodiments, the inner side of the winding drum is roughened at a position corresponding to the friction plate.

[0014] In some embodiments, the outer side of the support rod is wrapped with a soft layer.

[0015] The present application has at least the following advantages:

[0016] The device realizes intelligent adjustment of the posture of the safety net through the cooperation of the multiple winding drum mechanisms arranged in the support rod and the connecting rope system. When the falling is detected, the control system can accurately control the motor and the clutch unit on the side away from the falling point according to the tension sensor data, so that the corresponding connecting rope is actively unwound, and a net surface shape inclined to the center is formed. The active adjustment mechanism effectively solves the limitation of the passive protection of the traditional falling prevention net, ensures that the falling personnel can smoothly slide to the center position of the net, and greatly reduces the risk of secondary falling. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the application;

[0018] Figure 2 It is another schematic diagram of the overall structure of the application;

[0019] Figure 3 It is a schematic diagram of the support rod and the connecting rope structure of the application;

[0020] Figure 4 It is a schematic diagram of the connecting piece structure of the application;

[0021] Figure 5 It is a schematic diagram of the internal structure of the support rod of the application;

[0022] Figure 6 It is a schematic diagram of the winding drum structure of the application;

[0023] Figure 7 It is a schematic diagram of the application Figure 6 partial structure;

[0024] Figure 8 It is a schematic diagram of the connecting ring structure of the application;

[0025] Figure 9 It is a schematic diagram of the driving unit structure of the application;

[0026] Figure 10 It is a schematic diagram of the driving shaft structure of the application;

[0027] Figure 11 It is a schematic diagram of the clutch unit structure of the application.

[0028] In the figure: 1, mounting rod; 2, support rod; 3, safety net; 4, connecting rope; 5, winding drum; 6, connecting piece; 61, flexible rod; 62, tension sensor; 7, damping unit; 71, fixed sleeve; 72, one-way roller; 73, connecting ring; 74, connecting claw; 8, driving shaft; 9, clutch unit; 91, friction plate; 92, return spring; 10, driving unit; 101, retaining ring; 102, elastic telescopic rod; 103, driving ring; 104, magnetic plate; 11, support seat; 12, sliding groove; 13, sliding block; 14, support spring; 15, movable slot. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0030] Embodiment 1: Please refer to Figures 1-3 The present application provides a technical solution: a falling prevention device for high-altitude maintenance operation, comprising two installation rods 1, the two installation rods 1 are symmetrically arranged, which are vertically arranged metal rod bodies with a rectangular cross section. Bolt holes can be formed in the side walls of the installation rods 1, and flanges are welded at the bottoms, so that the installation rods 1 can be fixedly connected with external components through bolts or hoops, which serve as the basic carriers of the device. Support rods 2 are arranged on the side walls of the two installation rods 1, which are square hollow steel beams with soft cladding layers on the outer sides. The specific soft cladding layers can be rubber or sponge. A safety net 3 is arranged between the two support rods 2. When a person accidentally falls, the person can fall onto the safety net 3. The safety net 3 itself has a certain buffering effect and can protect the person, thereby achieving the effects of bearing and buffering. A plurality of connecting ropes 4 are arranged on the side walls of the two support rods 2. The connecting ropes 4 are arranged perpendicularly to the support rods 2 and below the horizontal ropes of the safety net 3. The plurality of connecting ropes 4 are connected with the side edges of the safety net 3, i.e., the side edges of the safety net 3 are connected with the outer sides of the connecting ropes 4 close to the support rods 2. The overall structure is support rod 2-connecting rope 4-safety net 3. Cavities are arranged in the support rods 2, and a plurality of winding drums 5 are arranged in the cavities. One end of each connecting rope 4 is wound around a winding drum 5. Thus, when the winding drums 5 rotate forward and reversely, the connecting ropes 4 can be unwound and wound, respectively. The other end of each connecting rope 4 is provided with a connecting piece 6, and the connecting ropes 4 on the two sides are connected with each other through the connecting pieces 6. The connecting pieces 6 are located in the middle of the two support rods 2 and also in the middle of the safety net 3 and are arranged parallel to the support rods 2. Damping units 7 are connected to the outer ends of the winding drums 5. When a person falls onto the safety net 3, the safety net 3 is first deformed to play a buffering role. Then, the impact force drives the winding drums 5 to rotate through the connecting ropes 4, so that the kinetic energy brought by the impact force is consumed through the damping units 7 to convert the mechanical energy into heat energy. Motors are arranged in the cavities. Drive shafts 8 are arranged at the output ends of the motors. The winding drums 5 are sleeved outside the drive shafts 8, and clutch units 9 are arranged outside the drive shafts 8. The connection states of the drive shafts 8 and the winding drums 5 can be changed through the clutch units 9.

[0031] When the personnel accidentally falls from high altitude, the personnel will fall on the safety net 3, when falling on the safety net 3, the personnel can fall on any position of the safety net 3, at the falling position, firstly, the safety net 3 around the falling position will be deformed, meanwhile, the connecting rope 4 under the position will be pressed, and then the connecting rope 4 on both sides of the connecting piece 6 will be subjected to different pulling force, that is, the connecting rope 4 close to the falling position will be subjected to greater pulling force, at this time, the connecting piece 6 detects the state, and then controls the motor on the other side, that is, the side far away from the falling position to drive the winding drum 5 to rotate, and actively unwinds the connecting rope 4 on the side by a distance, so that the connecting rope 4 close to the falling position can consume the impact force through the damping unit 7, and the connecting rope 4 on the other side is actively unwound, so that the unwound side is slightly lower than the falling position, and then the personnel can roll to the center position of the safety net 3 after falling on the safety net 3.

[0032] Embodiment 2: please refer to Figures 4-5 The application provides a technical solution: a falling prevention device for high-altitude maintenance work, the connecting piece 6 comprises a flexible rod 61, the flexible rod 61 can be a soft rod-shaped body made of silica gel, but the material is not limited, the top of the flexible rod 61 is provided with a soft pad, and a plurality of tension sensors 62 are arranged on both sides of the flexible rod 61, and the ends of the connecting ropes 4 on both sides are connected with the tension sensors 62 respectively, so that when the personnel falls on the safety net 3, the personnel will also fall on the connecting ropes 4, and then the difference between the data detected by the tension sensors 62 on both sides is used to judge the falling position, and then the motor is controlled to unwind the connecting ropes 4, so that the safety net 3 presents a certain inclination, and the personnel will move to the center position of the safety net 3 after falling on the safety net 3 even if there is a certain rebound force, thereby avoiding secondary falling.

[0033] A plurality of support seats 11 are fixedly arranged in the cavity, the driving shaft 8 penetrates through the support seats 11 and is supported by the support seats 11, so that the driving shaft 8 can stably operate in the cavity, the plurality of winding drums 5 are arranged in a linear array outside the driving shaft 8, the number of the winding drums 5 is consistent with the number of the connecting ropes 4, and a plurality of clutch units 9 are arranged at positions corresponding to the winding drums 5 on the driving shaft 8, when the clutch units 9 are started, the driving shaft 8 can drive the winding drums 5 to rotate when rotating, and when the clutch units 9 are closed, the driving shaft 8 will not drive the winding drums 5 to rotate when rotating.

[0034] Embodiment 3: please refer to Figures 6-9The application provides a technical scheme: a falling prevention device for high-altitude maintenance operation, the damping unit 7 comprises a fixed sleeve 71 fixedly arranged in a cavity, a plurality of one-way rollers 72 are arranged at both ends of the winding drum 5, the one-way rollers 72 can be realized by a one-way bearing, that is, the one-way rollers 72 can rotate in one direction only, the outer side of the one-way rollers 72 abuts against the inner side of the fixed sleeve 71, when the one-way rollers 72 rotate in the forward direction, the one-way rollers 72 can rotate along the inner side of the fixed sleeve 71, when the one-way rollers 72 rotate in the reverse direction, the rolling contact between the one-way rollers 72 and the inner side of the fixed sleeve 71 changes into sliding friction, the forward rotation direction of the one-way rollers 72 is the rotation direction of the winding drum 5 when the winding drum 5 winds the connecting rope 4, the reverse rotation direction of the one-way rollers 72 is the rotation direction of the winding drum 5 when the winding drum 5 unwinds the connecting rope 4, then when a person falls onto the safety net 3, the connecting rope 4 will also be impacted to drive the winding drum 5 to rotate, at this time, the one-way rollers 72 and the inner side of the fixed sleeve 71 are in sliding friction, and then the mechanical energy is converted into heat energy through friction, so that the impact force brought by the person falling is consumed, and secondary falling is effectively avoided, the end, away from the winding drum 5, of the guide roller is provided with a connecting ring 73, the plurality of one-way rollers 72 are connected with the connecting ring 73, a plurality of connecting claws 74 are movably arranged on the connecting ring 73, the outer side of the connecting claw 74 is provided as an inclined surface, and the connecting claw 74 is provided with a driving unit 10 used to drive the connecting claw 74 to move, when the connecting claw 74 moves towards the center position of the winding drum 5, the connecting claw 74 drives the one-way rollers 72 to move away from the fixed sleeve 71, at this time, the two do not contact, and when the motor drives the winding drum 5 to actively unwind the connecting rope 4, it is relatively smooth.

[0035] A sliding groove 12 is formed in the side wall of the winding drum 5 and the connecting ring 73, the direction of the sliding groove 12 is along the radial direction of the winding drum 5, a sliding block 13 is slidably arranged in the sliding groove 12, the rotating shafts of the one-way rollers 72 are respectively connected with the sliding blocks 13 on the two sides, the sliding block 13 can drive the one-way rollers 72 to move when the sliding block 13 moves, the sliding block 13 is connected with a supporting spring 14 at the bottom, in the initial state, the supporting spring 14 supports the sliding block 13, and then supports the one-way rollers 72, so that the one-way rollers 72 abut against the inner side of the fixed sleeve 71, the other end of the supporting spring 14 is connected with the inner wall of the sliding groove 12, the connecting claw 74 is fixedly arranged on the sliding block 13 on the connecting ring 73, and then the connecting claw 74 can drive the sliding block 13 to move when the connecting claw 74 moves, and then the one-way rollers 72 are driven to move.

[0036] The driving unit 10 comprises a retaining ring 101 fixedly arranged in the cavity, the sidewall of the retaining ring 101 is connected with an elastic telescopic rod 102, the end of the elastic telescopic rod 102 is connected with a driving ring 103, the elastic telescopic rod 102 plays a guiding and fixing role, so that the driving ring 103 can move stably along the axis of the retaining ring 101, and the opposite sides of the retaining ring 101 and the driving ring 103 are respectively provided with an electromagnet and a magnetic plate 104; when the electromagnet is electrified, the magnetic plate 104 can be repelled to drive the driving ring 103 to press the connecting claw 74, so that the connecting claw 74 drives the sliding block 13 to move, and the sliding block 13 drives the one-way roller 72 to move away from the inner side of the fixed sleeve 71, at this time, the damping unit 7 no longer plays a role, and then when the motor drives the winding drum 5 to actively release the connecting rope 4, the release can be smoothly performed; when the electromagnet is no longer electrified, the driving ring 103 is reset under the action of the elastic telescopic rod 102, the connecting claw 74 and the sliding block 13 are also reset under the action of the supporting spring 14, and then the one-way roller 72 is re-arranged to abut against the inner side of the fixed sleeve 71, so that the damping unit 7 can play a role again.

[0037] Embodiment 4: The application provides a technical scheme: a falling prevention device for high-altitude maintenance work, the outer diameters of the winding drums 5 are different, and the outer diameters of the winding drums 5 gradually decrease from the middle position of the supporting rod 2 to the positions on both sides of the supporting rod 2; through this gradual change, when the motor releases the connecting rope 4 through the winding drum 5, the length of the connecting rope 4 released in the middle is the largest, so that the safety net 3 presents a concave shape in the middle, and then when a person accidentally falls, the shape can promote the person to move to the middle position of the safety net 3 even if some rebound occurs, thereby effectively ensuring the safety of the worker.

[0038] Embodiment 5: Please refer to Figures 10-11 The application provides a technical scheme: a falling prevention device for high-altitude maintenance work, the inner side of the driving shaft 8 is provided with a movable groove 15, the clutch unit 9 comprises a friction plate 91 slidingly arranged in the movable groove 15, the bottom of the friction plate 91 is provided with a reset spring 92, the movable groove 15 is provided with an electromagnet, and the friction plate 91 is made of a magnetic material; when the electromagnet is electrified, the friction plate 91 is repelled to move and abut against the inner side of the winding drum 5, so that the driving shaft 8 can drive the winding drum 5 to rotate when the driving shaft 8 rotates, the winding drum 5 can release or wind the connecting rope 4, and when the electromagnet is not electrified, the friction plate 91 is reset away from the inner side of the winding drum 5 under the action of the reset spring 92, at this time, the driving shaft 8 cannot drive the winding drum 5 to rotate, through this mode, passive damping type release of the winding drum 5 driven by the connecting rope 4 can be completed to consume energy, and active release of the winding drum 5 driven by the motor can also be completed, so that the state of the safety net 3 can be adjusted, and it is more convenient for a person to roll to the center position of the safety net 3 after falling on the safety net 3.

[0039] The inside of the winding drum 5 is roughened at a position corresponding to the friction plate 91, so that the friction force is increased and the transmission efficiency is improved.

[0040] It is to be understood that the terminology used herein such as first and second, and the like, is merely for distinguishing one entity or action from another entity or action that is discussed, and is not necessarily intended to denote a physical or temporal priority or sequence in the performance of the respective entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0041] While embodiments of the present application have been shown and described, it is to be understood that the embodiments described are merely divergences, modifications, replacements and variations of the embodiments of the present application, and can be changed, modified, replaced and varied in many ways without departing from the principles and spirit of the present application.

Claims

1. A fall prevention device for high-altitude maintenance work, comprising two mounting rods (1), the side walls of the two mounting rods (1) are each provided with a support rod (2), and a safety net (3) is provided between the two support rods (2), characterized in that: The side walls of the two support rods (2) are each provided with a plurality of connecting ropes (4), and the plurality of connecting ropes (4) are all connected to the side of the safety net (3). A cavity is provided inside the support rod (2), and a plurality of reels (5) are provided in the cavity. One end of the connecting rope (4) is wound on the reel (5), and the other end of the connecting rope (4) is provided with a connector (6), and the connecting ropes (4) on both sides are connected to each other through the connector (6). The outer end of the reel (5) is connected to a damping unit (7), a motor is provided in the cavity, and a drive shaft (8) is provided at the output end of the motor. The reel (5) is sleeved on the outside of the drive shaft (8), and a clutch unit (9) is provided on the outside of the drive shaft (8); The damping unit (7) includes a fixed sleeve (71) fixedly arranged in the cavity, a plurality of one-way rollers (72) are provided at both ends of the reel (5), the outer sides of the one-way rollers (72) abut against the inner sides of the fixed sleeve (71), a connecting ring (73) is provided at one end of the one-way roller (72) away from the reel (5), the plurality of one-way rollers (72) are all connected to the connecting ring (73), a plurality of connecting claws (74) are movably provided on the connecting ring (73), and a driving unit (10) for driving the connecting claws (74) to move is provided on the outer sides of the connecting claws (74); A sliding groove (12) is provided on the side wall of the reel (5) and the connecting ring (73), a slider (13) is slidably provided in the sliding groove (12), both ends of the rotating shaft of the one-way roller (72) are respectively connected to the sliders (13) on both sides, a supporting spring (14) is connected to the bottom of the slider (13), the other end of the supporting spring (14) is connected to the inner wall of the sliding groove (12), and the connecting claw (74) is fixedly provided on the slider (13) on the connecting ring (73); The driving unit (10) comprises a retaining ring (101) fixedly arranged in the cavity, a side wall of the retaining ring (101) being connected to an elastic telescopic rod (102), an end of the elastic telescopic rod (102) being connected to a driving ring (103), and an electromagnet and a magnetic plate (104) being respectively provided on opposite sides of the retaining ring (101) and the driving ring (103), and when the electromagnet is energized, it can repel the magnetic plate (104) so ​​as to drive the driving ring (103) to squeeze the connecting claw (74); A movable groove (15) is provided on the inner side of the driving shaft (8), and the clutch unit (9) includes a friction plate (91) slidably arranged in the movable groove (15). A return spring (92) is provided at the bottom of the friction plate (91). An electromagnet is provided in the movable groove (15) and the friction plate (91) is made of a magnetic material. When the electromagnet is energized, the friction plate (91) is repelled and moves to abut against the inner side of the reel (5).

2. The anti-fall device for high-altitude maintenance work according to claim 1 is characterized in that: The connecting member (6) comprises a flexible rod (61), a soft pad is provided on the top of the flexible rod (61), a plurality of tension sensors (62) are provided on both sides of the flexible rod (61), and the ends of the connecting ropes (4) on both sides are respectively connected to the tension sensors (62).

3. The anti-fall device for high-altitude maintenance work according to claim 1 is characterized in that: A plurality of support seats (11) are fixedly arranged in the cavity, the drive shaft (8) rotates and passes through the support seats (11), the plurality of reels (5) are arranged in a linear array outside the drive shaft (8), and a plurality of clutch units (9) are arranged at positions of the drive shaft (8) corresponding to the reels (5).

4. The anti-fall device for high-altitude maintenance work according to claim 1 is characterized in that: The outer diameters of the reels (5) are all different, and the outer diameters of the reels (5) gradually decrease from the middle of the support rod (2) to the positions on both sides of the support rod (2).

5. The anti-fall device for high-altitude maintenance work according to claim 1 is characterized in that: The inner side of the reel (5) corresponding to the position of the friction plate (91) is roughened.

6. The anti-fall device for high-altitude maintenance work according to claim 1, characterized in that: The outer side of the support rod (2) is wrapped with a soft covering layer.

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