Exterior wall aerial platform lifting safety device and method

Abstract

The present application relates to a kind of outer wall aerial work platform hoisting safety device and method, and it relates to the technical field of aerial work platform safety control;Including fixed frame, fixed frame is installed with fixed platform below through fixed rope, and mobile platform is slidably arranged on the periphery of fixed platform, and a plurality of detection devices are connected to the fixed column and guardrail.The present application can solve the following problems existing in the process of safety control of aerial work platform in the prior art: by setting the rotating multistage telescopic rod, drive photoelectric detector one and photoelectric detector two on multistage telescopic rod, obstacles can be detected during rising and falling, and the lifting safety in aerial work is guaranteed.By setting reciprocating photoelectric detector two, the existence of obstacles is captured sharply before the equipment actually contacts the obstacles above, so that workers can obtain information in advance when facing potential obstacle risks.

Description

Technical Field

[0001] This invention relates to the technical field of safety control for aerial work platforms, and particularly to a lifting safety device and method for an exterior wall aerial work platform. Background Technology

[0002] With the acceleration of urbanization, high-rise buildings are becoming increasingly common, leading to higher and higher levels of construction work on exterior walls. During the lifting process, workers may fall due to equipment malfunctions, operational errors, or other reasons. According to statistics, falls from height account for a significant proportion of construction accidents, highlighting the importance of safety devices in preventing such incidents.

[0003] When the work platform is close to the exterior wall of a building, it may collide with the building, or with protrusions on the building, or other construction equipment, which may cause damage to the workers and equipment. Therefore, the safety device needs to have anti-collision function.

[0004] For example, Chinese Patent Publication No. CN118255302A discloses an anti-collision system for an aerial work platform and the aerial work platform itself. The anti-collision system includes a work platform; multiple scanning bracket assemblies arranged at intervals around the edge of the work platform, each scanning bracket assembly extending upwards from the work platform and having a photoelectric sensor at its extended end for scanning and detecting obstacles; and a rotation drive assembly for driving the scanning bracket assemblies to rotate and causing the photoelectric sensors to reciprocate and scan. This anti-collision system and the aerial work platform itself can improve the safety of the aerial work platform and its operators.

[0005] However, the above-mentioned device still has some shortcomings in actual use:

[0006] 1. The above-mentioned device is equipped with multiple photoelectric sensors through a scanning bracket assembly. The photoelectric sensors detect and scan obstacles above during the ascent. Then, when the work platform descends after completing the work, considering that the high-altitude work time is relatively long and some building windows are open, the exterior surface of the building will change during the descent. The above-mentioned device cannot detect obstacles below during the descent, which causes safety hazards.

[0007] 2. The above-mentioned device achieves the purpose of detection by contacting the obstacle with the limit switch. However, the detection range is limited to the installation position of the limit switch and cannot cover the entire area above the working platform. It is also prone to detection blind spots, resulting in missed detection. The obstacle must be in contact with the limit switch to be detected, leaving the operator with a short reaction time.

[0008] Therefore, based on the above-mentioned viewpoints, it is of great significance to improve and perfect the anti-collision system of aerial work platforms and the aerial work platforms themselves. This will not only enable the detection of obstacles when the work platform is descending, but also enable the early detection of the work area above the platform. Summary of the Invention

[0009] To address the aforementioned problems, this invention provides a safety device and method for lifting an exterior wall high-altitude work platform.

[0010] A safety device for lifting an exterior wall high-altitude work platform includes a fixed frame, a fixed platform installed below the fixed frame via a fixed rope, a movable platform slidably arranged around the fixed platform, a guardrail installed at the end of the movable platform away from the fixed platform, fixed posts installed at the four corners of the fixed platform, and telescopic components connecting the fixed posts and the movable platform.

[0011] The fixed post is snapped into the guardrail with multiple detection devices. Each detection device includes a snap-fit ​​mounting block, on which a multi-stage telescopic rod is rotatably mounted, and a detection structure is installed on the multi-stage telescopic rod.

[0012] Preferably, the multi-stage telescopic rod has a working groove inside. The detection structure includes a telescopic shaft rotatably disposed inside the working groove. The telescopic shaft passes through the multi-stage telescopic rod. One end of the telescopic shaft located at the bottom of the multi-stage telescopic rod is connected to a photoelectric detector, and the other end of the telescopic shaft is provided with a swing device. A second photoelectric detector is installed through the swing device.

[0013] Preferably, the swing device includes a rotating shaft, which is mounted on a multi-stage telescopic rod via two U-shaped rods, and the photoelectric detector is mounted on the rotating shaft.

[0014] Preferably, the fixed post and the guardrail are provided with a drive structure that enables the multi-stage telescopic rod to rotate. The drive structure includes a drive shaft, which is rotatably mounted on the mounting block. The drive shafts on the same moving platform are connected by belt drive. The drive shaft extends into the working groove. A take-up roller is installed at one end of the drive shaft located in the working groove. A pull rope is wound on the take-up roller, and one end of the pull rope is connected to the top of the multi-stage telescopic rod.

[0015] Preferably, the take-up roller is connected to the bottom of the multi-stage telescopic rod via a spiral spring, and the spiral spring is connected to the multi-stage telescopic rod via a ratchet. A stop bar is slidably provided on the mounting block along its height direction, and stop blocks are provided at both ends of the stop bar. A stop block is slidably installed on the fixed end of the multi-stage telescopic rod.

[0016] Preferably, the two stops are staggered, and the distances between the two stops and the drive shaft are different.

[0017] Preferably, the top of the multi-stage telescopic rod is provided with a drive rod, and the drive rod is movably engaged with the stop rod.

[0018] Preferably, a sliding component is installed on the fixed platform to drive the mobile platform to slide. The sliding component includes a reciprocating screw. The fixed platform has a receiving groove for the mobile platform to slide. The reciprocating screw is rotatably installed inside the receiving groove. The reciprocating screw is connected to one of the drive shafts through a ratchet.

[0019] Preferably, a connecting seat is installed at one end of the mobile platform located in the receiving groove, and a connecting ring is provided inside the connecting seat through ratchet teeth, and the connecting ring is threadedly connected to the reciprocating screw.

[0020] On the other hand, a safety improvement method for an exterior wall high-altitude work platform is as follows:

[0021] S1. Platform Upward Movement: The fixed platform is moved upward by pulling the fixed frame;

[0022] S2, Obstacle Detection: The lower photoelectric detector rotates, while the upper photoelectric detector swings back and forth, detecting obstacles during the ascent.

[0023] S3. Descent Detection: When the fixed platform descends, the multi-stage telescopic rod retracts and then rotates under the action of the spiral spring. After the rotation is completed, the multi-stage telescopic rod returns to its initial state and detects obstacles during descent.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] I. This invention, by setting up a rotating multi-stage telescopic rod, drives photoelectric detector 1 and photoelectric detector 2 on the multi-stage telescopic rod to detect obstacles during the ascent and descent, thus ensuring the safety of lifting and lowering operations at height.

[0026] Second, this invention, by incorporating a reciprocating oscillating photoelectric detector, can sensitively detect the presence of obstacles before the equipment actually comes into contact with them. This allows workers to obtain information in advance when facing potential obstacle risks, thus allowing more reaction time to take timely and effective countermeasures, avoiding potential collisions or other work obstacles, and significantly improving work safety and efficiency.

[0027] Third, this invention, by incorporating a sliding mobile platform, allows for precise adjustments to the workspace based on specific operational needs. Whether performing delicate operations in confined spaces or expanding the work area in open areas, it can handle the task with ease. Furthermore, when the mobile platform encounters obstacles during operation, the combined action of photoelectric detectors one and two controls the platform to flexibly avoid obstacles within a certain range, effectively preventing obstacles from interfering with the platform's upward movement and significantly improving work efficiency and safety. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 This is a schematic diagram of the structure of the mobile platform of the present invention.

[0031] Figure 3 This is a schematic diagram of the structure of the multi-stage telescopic rod of the present invention.

[0032] Figure 4 This is a schematic diagram of the internal structure of the multi-stage telescopic rod of the present invention.

[0033] Figure 5 This is the present invention. Figure 4 A schematic diagram of the structure at point A in the middle.

[0034] Figure 6 This is a schematic diagram of the swing device of the present invention.

[0035] Figure 7 This is a schematic diagram of the structure of the stop bar of the present invention.

[0036] Figure 8 This is a schematic diagram of the internal structure of the fixed platform of the present invention.

[0037] Figure 9 This is the present invention. Figure 8 A schematic diagram of the structure at point B.

[0038] Figure 10 This is a schematic diagram of the structure of the connector of the present invention.

[0039] Figure 11 This is a schematic diagram of the structure of the snap-fit ​​component of the present invention.

[0040] In the diagram, 1. Fixed frame; 10. Fixed platform; 11. Moving platform; 12. Guardrail; 13. Fixed post; 14. Telescopic assembly; 2. Detection device; 20. Mounting block; 21. Multi-stage telescopic rod; 22. Detection structure; 220. Working groove; 221. Telescopic shaft; 222. Photoelectric detector one; 224. Photoelectric detector two; 225. Rotating shaft; 226. U-shaped rod; 3. Reciprocating component; 30. Drive gear; 31. Connector 32. Shaft; 33. Transmission gear; 34. Transmission gear ring; 35. Forward gear; 36. Drive gear ring; 4. Reverse gear; 4. Drive structure; 40. Drive shaft; 41. Take-up roller; 42. Pull rope; 50. Stop bar; 51. Stop block; 52. Abutment block; 53. Drive rod; 6. Sliding component; 60. Reciprocating screw; 61. Receiving groove; 62. Connecting seat; 63. Connecting ring; 7. Snap-fit ​​component; 70. Storage groove; 71. Snap-fit ​​block. Detailed Implementation

[0041] The following is in conjunction with the appendix Figures 1-11 The embodiments of the present invention will be described in detail below.

[0042] This application discloses a lifting safety device and method for an aerial work platform. It is noted that the present invention is mainly used in the safety control process of aerial work platforms. In terms of technical effect, it can avoid the problem that the work platform cannot detect obstacles below when it is descending, which would cause safety hazards. Furthermore, the present invention can also solve the problem that obstacles must be in contact with limit switches to be detected, leaving operators with a short reaction time.

[0043] Example 1:

[0044] Reference Figure 1 and Figure 2 As shown, the system includes a fixed frame 1, a fixed platform 10 installed below the fixed frame 1 via a fixing rope, and a movable platform 11 slidably mounted around the fixed platform 10. The fixed platform 10 is raised and lowered by pulling the fixed frame 1, thus providing support for high-altitude operations on the exterior wall. A guardrail 12 is installed at the end of the movable platform 11 away from the fixed platform 10, and fixed posts 13 are installed at the four corners of the fixed platform 10. Telescopic components 14 connect the fixed posts 13 to the movable platform 11.

[0045] The function of both guardrail 12 and telescopic component 14 is to prevent workers from falling during high-altitude operations.

[0046] Multiple detection devices 2 are snapped onto the fixed post 13 and the guardrail 12. Each detection device 2 includes a snap-fit ​​mounting block 20, on which a multi-stage telescopic rod 21 is rotatably mounted. A detection structure 22 is mounted on the multi-stage telescopic rod 21. Different numbers of detection devices 2 can be installed as needed. If the detection device 2 conflicts with the surface of the exterior wall during vertical movement, the detection device 2 can be disassembled.

[0047] The rotating detection device 2 can align the detection structure 22 with the lower position to perform detection when the fixed platform 10 descends, preventing new obstacles from appearing and blocking the downward movement of the fixed platform 10 after it rises.

[0048] Reference Figure 4 and Figure 6 The diagram shows a schematic of the structure for detecting obstacles. Specifically, the multi-stage telescopic rod 21 has a working groove 220 inside. The detection structure 22 includes a telescopic shaft 221 that is rotatably installed inside the working groove 220. The telescopic shaft 221 passes through the multi-stage telescopic rod 21. One end of the telescopic shaft 221 at the bottom of the multi-stage telescopic rod 21 is connected to a photoelectric detector 222. The other end of the telescopic shaft 221 is provided with a swing device, through which a photoelectric detector 224 is installed.

[0049] Among them, photoelectric detector 1 222 and photoelectric detector 224 are preferably existing devices that can detect obstacles through the photoelectric effect principle, and determine whether there is an obstacle by the change of light signal, such as photoelectric sensors, infrared obstacle sensors, etc.

[0050] The photoelectric detector 222 at the bottom of the multi-stage telescopic pole 21 can rotate via the telescopic shaft 221 to detect the rotation of the outer wall within a certain range. The photoelectric detector 224, which is installed at the other end of the telescopic shaft 221 via a swing device, can swing back and forth while rotating itself, increasing the detection angle and range and enhancing the detection effect.

[0051] Reference Figure 4 and Figure 6 The diagram shows the structure that drives the photoelectric detector 224 to swing. Specifically, the swinging device includes a rotating shaft 225 and U-shaped rods 226. The rotating shaft 225 is mounted on the multi-stage telescopic rod 21 through two U-shaped rods 226, and the photoelectric detector 224 is mounted on the rotating shaft 225.

[0052] By driving the rotating shaft 225 to rotate back and forth, the photoelectric detector 224 is driven to oscillate back and forth.

[0053] Reference Figure 6The diagram shows the structure that drives the rotating shaft 225 to rotate; specifically, the multi-stage telescopic rod 21 is equipped with a reciprocating component 3 that drives the rotating shaft 225 to rotate back and forth.

[0054] The reciprocating component 3 includes a drive gear 30, which is mounted on a telescopic shaft 221. A connecting shaft 31 is rotatably mounted on one of the U-shaped rods 226. A transmission gear 32 that meshes with the drive gear 30 is provided at one end of the connecting shaft 31 near the multi-stage telescopic rod 21. A transmission gear ring 33 is mounted at one end of the connecting shaft 31 near the rotating shaft 225. A positive gear 34 that meshes with the transmission gear ring 33 is connected to one end of the rotating shaft 225 via a ratchet.

[0055] The telescopic shaft 221 rotates, driving the drive gear 30 to rotate, which in turn drives the transmission gear 32 to rotate synchronously. The transmission gear 32 drives the connecting shaft 31 to rotate, which in turn causes the transmission gear ring 33 to rotate synchronously. The transmission gear 32 drives the forward gear 34 to rotate, causing the rotating shaft 225 to rotate synchronously. This completes the process of the telescopic shaft 221 driving the rotating shaft 225 to rotate, which in turn causes the photoelectric detector 224 on the rotating shaft 225 to swing. It should be noted that the drive gear 30 is a half gear. After the drive gear 30 rotates half a turn, the rotating shaft 225 rotates 180 degrees in one direction. After that, when the drive gear 30 continues to rotate, the rotating shaft 225 stops rotating.

[0056] The reciprocating component 3 also includes a drive gear ring 35, which is mounted on the top of the multi-stage telescopic rod 21. The other end of the rotating shaft 225 is connected to a reverse gear 36 via a ratchet, and the reverse gear 36 meshes with the drive gear ring 35.

[0057] The telescopic shaft 221 rotates, driving the drive gear ring 35. The rotation of the drive gear ring 35 drives the reverse gear 36 to rotate the shaft 225 in the other direction. After the drive gear 30 drives the shaft 225 to rotate 180 degrees, the cooperation between the drive gear ring 35 and the reverse gear 36 causes the photoelectric detector 224 to rotate in the other direction, thus realizing the reciprocating oscillation of the photoelectric detector 224.

[0058] Reference Figure 3 , Figure 4 and Figure 5The diagram shows the structure that drives the multi-stage telescopic rod 21 to retract. Specifically, the fixed column 13 and the guardrail 12 are provided with a drive structure 4 that enables the multi-stage telescopic rod 21 to rotate. The drive structure 4 includes a drive shaft 40, which is rotatably mounted on the mounting block 20. The drive shafts 40 on the same moving platform 11 are connected by belt drive. The drive shaft 40 extends into the working groove 220. A take-up roller 41 is installed at one end of the drive shaft 40 located in the working groove 220. A pull rope 42 is wound on the take-up roller 41, and one end of the pull rope 42 is connected to the top of the multi-stage telescopic rod 21.

[0059] When the drive shaft 40 rotates, it drives the take-up roller 41 to rotate as well. When the take-up roller 41 rotates, it winds the pull rope 42, which pulls the top of the multi-stage telescopic rod 21, causing the multi-stage telescopic rod 21 to gradually retract. The retraction of the multi-stage telescopic rod 21 makes it easier to drive it to rotate in the future, reducing the space required for rotation.

[0060] Reference Figure 3 , Figure 4 and Figure 5 The diagram shows the structure that drives the multi-stage telescopic rod 21 to rotate. Specifically, the take-up roller 41 is connected to the bottom of the multi-stage telescopic rod 21 through a spiral spring, and the spiral spring is connected to the multi-stage telescopic rod 21 through a ratchet. A stop bar 50 is slidably provided on the mounting block 20 along its height direction. Stop blocks 51 are provided at both ends of the stop bar 50. A stop block 52 is slidably installed on the fixed end of the multi-stage telescopic rod 21.

[0061] When the take-up roller 41 rotates, the spiral spring contracts synchronously to store force. However, since the stop block 52 on the multi-stage telescopic rod 21 abuts against the stop block 51 on the stop rod 50, the take-up roller 41 will not drive the multi-stage telescopic rod 21 to rotate until the multi-stage telescopic rod 21 is fully retracted.

[0062] The two stop blocks 51 are misaligned, and the distances between the two stop blocks 51 and the drive shaft 40 are different.

[0063] The top of the multi-stage telescopic rod 21 is provided with a drive rod 53, and the drive rod 53 is movablely engaged with the stop rod 50.

[0064] During the retraction process, the drive rod 53 at the top of the multi-stage telescopic rod 21 will gradually approach the stop rod 50 until it contacts the stop rod 50, which will push the stop rod 50 to slide downward. At this time, the stop block 52 on the multi-stage telescopic rod 21 loses the restriction of the stop block 51 on the stop rod 50 and rotates 180 degrees under the action of the spiral spring.

[0065] The reason for the misalignment of the stop 51 is that the distance between the abutment 52 and the drive shaft 40 is fixed. No matter how the multi-stage telescopic rod 21 rotates, the distance remains constant. The stop rod 50 will slide downward under the action of the drive rod 53. At this time, the stop 51 at the upper end of the stop rod 50 will also move down so as to be misaligned with the abutment 52. At this time, under the push of the spiral spring, the multi-stage telescopic rod 21 rotates smoothly.

[0066] The upper stop block 51 of the stop lever 50 moves down a certain distance to ensure that it is vertically misaligned with the abutment block 52. At the same time, because the distances between the two stop blocks 51 and the drive shaft 40 are different, and the distance between the lower stop block 51 of the stop lever 50 and the drive shaft 40 is smaller than the distance between the upper stop block 51 and the drive shaft 40, after the stop lever 50 moves down and ensures that the upper stop block 51 and the abutment block 52 are vertically misaligned, the distance between the lower stop block 51 and the drive shaft 40 increases. The increase in distance is the distance that the upper stop block 51 descends.

[0067] Based on this, when the upper stop block 51 and the abutment block 52 are misaligned, when the multi-stage telescopic rod 21 rotates 180 degrees, the abutment block 52 will also rotate 180 degrees and will come into contact with the lower stop block 51.

[0068] Reference Figure 7 , Figure 8 , Figure 9 and Figure 10 The diagram shows the structure of the sliding mobile platform 11. Specifically, a sliding component 6 is installed on the fixed platform 10 to drive the sliding mobile platform 11. The sliding component 6 includes a reciprocating screw 60. The fixed platform 10 has a receiving groove 61 for the sliding of the mobile platform 11. The reciprocating screw 60 is rotatably installed inside the receiving groove 61. The reciprocating screw 60 is connected to one of the drive shafts 40 through a ratchet.

[0069] The reciprocating screw 60 rotates to drive the mobile platform 11 to slide inside the receiving groove 61. By sliding the mobile platform 11, the working space can be expanded or reduced according to specific work needs.

[0070] Furthermore, when encountering obstacles, the reciprocating screw 60 drives the moving platform 11 to slide, enabling it to avoid obstacles within a certain range.

[0071] The mobile platform 11 is equipped with a connecting seat 62 at one end of the receiving groove 61. The connecting seat 62 is provided with a connecting ring 63 through ratchet and ratchet teeth. The connecting ring 63 is threadedly connected to the reciprocating screw 60.

[0072] When the reciprocating screw 60 rotates in the forward direction, because the reciprocating screw 60 and the drive shaft 40 are connected by a ratchet, the forward rotation can drive the drive shaft 40 to rotate, thereby completing the retraction and rotation of the multi-stage telescopic rod 21. At the same time, when the reciprocating screw 60 rotates in the forward direction, because the connecting ring 63 and the connecting seat 62 are connected by a ratchet, the connecting ring 63 will not drive the connecting seat 62 to rotate. The connecting seat 62 is restricted in the receiving groove 61 and can only move axially. Therefore, there is no threaded engagement between the reciprocating screw 60 and the connecting ring 63, and the reciprocating screw 60 will drive the connecting ring 63 to rotate.

[0073] When the reciprocating screw 60 rotates in the reverse direction, because the reciprocating screw 60 and the drive shaft 40 are connected by a ratchet, the drive shaft 40 can rotate when rotating in the forward direction, that is, the drive shaft 40 does not rotate when rotating in the reverse direction. At the same time, when the reciprocating screw 60 rotates in the reverse direction, because of the ratchet, the connecting seat 62 will not rotate when rotating in the forward direction. Therefore, when rotating in the reverse direction, the connecting ring 63 will rotate the connecting seat 62. However, because the connecting seat 62 is restricted in the receiving groove 61, it can only move axially. Therefore, a threaded engagement occurs between the reciprocating screw 60 and the connecting ring 63, causing the connecting seat 62 to move axially in the receiving groove 61, thereby moving the moving platform 11 out of the fixed platform 10.

[0074] As can be seen from the above, when the reciprocating screw 60 rotates in the opposite direction, the moving platform 11 can be moved out of the fixed platform 10.

[0075] When the mobile platform 11 needs to return to the receiving groove 61, the reciprocating screw 60 continues to rotate in the opposite direction. Due to the engagement of the ratchet and ratchet, the connecting seat 62 continues to move out of the receiving groove 61 under the action of the reciprocating screw 60. Due to the double helix characteristic of the reciprocating screw 60, the connecting seat 62 moves back and forth between the two ends of the reciprocating screw 60. When the reciprocating screw 60 continues to rotate in the opposite direction and the connecting seat 62 moves to the end of the reciprocating screw 60, the connecting seat 62 moves in the opposite direction along the length of the reciprocating screw 60, which will drive the mobile platform 11 to move towards the receiving groove 61 until the mobile platform 11 is stored in the receiving groove 61.

[0076] Example 2:

[0077] Based on Embodiment 1, in order to further improve the stability of the mobile platform 11, a snap-fit ​​component 7 is also proposed, which is beneficial for limiting the mobile platform 11 and preventing the mobile platform 11 from sliding when the reciprocating screw 60 does not drive it to slide.

[0078] Reference Figure 9 and Figure 11The diagram shows a structural schematic of fixing the mobile platform 11. Specifically, the snap-fit ​​component 7 includes a snap-fit ​​block 71. The bottom of the receiving groove 61 is provided with multiple storage slots 70 at equal intervals along the sliding direction of the mobile platform 11. The end of the mobile platform 11 located in the receiving groove 61 is provided with a snap-fit ​​block 71 via a spring telescopic rod.

[0079] When the mobile platform 11 moves, the locking block 71 on the mobile platform 11 will extend into the storage slot 70. When the reciprocating screw 60 cannot drive the mobile platform 11 to slide, the cooperation between the storage slot 70 and the locking block 71 will further limit the movement of the mobile platform 11 to prevent it from moving and affecting the safety of the staff.

[0080] During work:

[0081] The first step is to move the fixed platform 10 upward by pulling the fixed frame 1.

[0082] Step 2: During the upward movement, the telescopic shaft 221 rotates, causing the photoelectric detector 222 to rotate as well. During the ascent, the lower area is detected. At the same time, the rotation of the telescopic shaft 221 drives the photoelectric detector 224 above the multi-stage telescopic rod 21 to swing back and forth through the swinging device, detecting the upper area during the ascent.

[0083] Step 3: When the fixed platform 10 descends, the drive shaft 40 rotates, and through the cooperation of the take-up roller 41 and the pull rope 42, the multi-stage telescopic rod 21 retracts until the drive rod 53 on the multi-stage telescopic rod 21 approaches the stop bar 50. At this point, the stop block 52 on the multi-stage telescopic rod 21 loses the limit of the stop block 51 on the stop bar 50 and rotates under the action of the spiral spring. After the rotation is completed, the multi-stage telescopic rod 21 returns to its initial state and detects obstacles during descent.

[0084] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects.

[0085] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lifting safety device for an exterior wall high-altitude work platform, comprising a fixed frame, wherein a fixed platform is installed below the fixed frame via a fixing rope, characterized in that: A movable platform is slidably arranged around the fixed platform. A guardrail is installed at the end of the movable platform away from the fixed platform. Fixed posts are installed at the four corners of the fixed platform. Telescopic components are connected between the fixed posts and the movable platform. The fixed post is snapped into the guardrail and multiple detection devices are installed. Each detection device includes a snap-fit ​​mounting block, a multi-stage telescopic rod is rotatably mounted on the mounting block, a detection structure is installed on the multi-stage telescopic rod, and a working groove is opened inside the multi-stage telescopic rod. The fixed post and guardrail are equipped with a drive structure that enables the multi-stage telescopic rod to rotate. The drive structure includes a drive shaft, which is rotatably mounted on the mounting block. The drive shafts on the same moving platform are connected by belt drive. The drive shaft extends into the working groove. A take-up roller is installed at one end of the drive shaft located in the working groove. A pull rope is wound on the take-up roller, and one end of the pull rope is connected to the top of the multi-stage telescopic rod. The take-up roller is connected to the bottom of the multi-stage telescopic rod by a spiral spring, and the spiral spring is connected to the multi-stage telescopic rod by a ratchet. A stop bar is slidably provided on the mounting block along its height direction, and a stop block is provided at both ends of the stop bar. A stop block is slidably installed on the fixed end of the multi-stage telescopic rod. The two stops are misaligned, and the distances between the two stops and the drive shaft are different; The top of the multi-stage telescopic rod is provided with a drive rod, and the drive rod is movablely engaged with the stop rod; When the take-up roller rotates, the spiral spring contracts synchronously to store energy. However, because the abutment on the multi-stage telescopic rod and the stop on the stop bar are in contact, the take-up roller will not drive the multi-stage telescopic rod to rotate when it rotates, until the multi-stage telescopic rod is fully retracted. During the retraction process, the drive rod at the top of the multi-stage telescopic rod gradually approaches the stop bar until it contacts the stop bar. Then, it pushes the stop bar to slide downward. At this time, the stop block on the multi-stage telescopic rod loses the restriction of the stop block on the stop bar and rotates 180 degrees under the action of the spiral spring.

2. The lifting safety device for an exterior wall high-altitude work platform according to claim 1, characterized in that: The detection structure includes a telescopic shaft rotatably installed inside the working groove. The telescopic shaft is threaded through a multi-stage telescopic rod. One end of the telescopic shaft at the bottom of the multi-stage telescopic rod is connected to a photoelectric detector, and the other end of the telescopic shaft is equipped with a swing device, through which a second photoelectric detector is installed.

3. The lifting safety device for an exterior wall high-altitude work platform according to claim 2, characterized in that: The swing device includes a rotating shaft and U-shaped rods. The rotating shaft is mounted on a multi-stage telescopic rod via two U-shaped rods, and the photoelectric detector is mounted on the rotating shaft.

4. The lifting safety device for an exterior wall high-altitude work platform according to claim 1, characterized in that: The fixed platform is equipped with a sliding component that drives the mobile platform to slide.

5. A method for safely lifting an exterior wall high-altitude work platform, employing a safety device for lifting an exterior wall high-altitude work platform as described in any one of claims 2-4, characterized in that: The safety methods for lifting high-altitude work platforms on exterior walls are as follows: S1. Platform Upward Movement: The fixed platform is moved upward by pulling the fixed frame; S2, Obstacle Detection: The lower photoelectric detector rotates, while the upper photoelectric detector swings back and forth, detecting obstacles during the ascent. S3. Descent Detection: When the fixed platform descends, the multi-stage telescopic rod retracts and then rotates under the action of the spiral spring. After the rotation is completed, the multi-stage telescopic rod returns to its initial state and detects obstacles during descent.

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