Safety hanging basket mounting structure for high-place operation

Abstract

The invention discloses a high-place operation safety hanging basket installation structure, and relates to the technical field of building construction hanging baskets, the high-place operation safety hanging basket installation structure comprises a working platform, an electric control system and a plurality of winches, the electric control system and the winches are arranged on the working platform, all the winches are electrically connected with the electric control system, and each winch on the working platform is correspondingly provided with a set of suspension mechanism; the hanging mechanism comprises a front support, a rear support, a cross beam and balancing weights, the cross beam is fixedly connected with the front support and the rear support, the balancing weights are arranged on the rear support, and a steel wire rope hanging head is fixedly arranged on the cross beam and located on the side, away from the rear support, of the front support; working steel wire ropes of the winches are fixedly connected with the steel wire rope hanging heads on the corresponding hanging mechanisms, and the distance between the rear support and the front support is not smaller than the distance between the steel wire rope hanging heads and the front support. The working platform is hoisted according to the lever principle, the hanging mechanism does not need to be fixed by reserving embedded steel bars, and therefore the flexibility of hanging basket installation is improved.

Description

Technical Field

[0001] The present application relates to the technical field of construction hanging baskets, and in particular to a safety hanging basket installation structure for high-altitude operations. Background Art

[0002] At present, with the rapid development of the construction industry, the demand for high-altitude operations such as exterior wall construction, curtain wall installation, insulation construction, and exterior wall maintenance and cleaning of high-rise and multi-story buildings is increasing. As a commonly used high-altitude operation equipment, the hanging basket plays an important role in these operations. However, the traditional hanging basket installation method usually requires the position of the embedded steel bars to be pre-set before construction, which seriously limits the flexibility of the hanging basket installation. Summary of the invention

[0003] In view of the problems existing in the prior art, the present application provides a safety hanging basket installation structure for high-altitude operations.

[0004] The present application provides a high-altitude operation safety hanging basket installation structure, which adopts the following technical solutions: A high-altitude operation safety hanging basket installation structure includes a working platform and an electric control system and multiple winches arranged on the working platform, each of the winches is electrically connected to the electric control system, and each winch on the working platform is respectively provided with a corresponding suspension mechanism, the suspension mechanism includes a front bracket, a rear bracket, a crossbeam and a counterweight block, the crossbeam is respectively fixedly connected to the front bracket and the rear bracket, a plurality of counterweight blocks are provided and placed on the rear bracket, a wire rope head is fixedly provided on the crossbeam and on the side of the front bracket away from the rear bracket, the working wire rope of the winch is fixedly connected to the wire rope head on the corresponding suspension mechanism, and the distance between the rear bracket and the front bracket is not less than the distance between the wire rope head and the front bracket.

[0005] Optionally, a first adjusting rod is slidably provided on the front bracket, the crossbeam is fixedly provided on the first adjusting rod, and a first fixing member for preventing the first adjusting rod from sliding is provided on the front bracket.

[0006] Optionally, a second adjusting rod is slidably provided on the rear bracket, the second adjusting rod is fixedly connected to the cross beam, and a second fixing member for preventing the second adjusting rod from sliding is provided on the rear bracket.

[0007] Optionally, the cross beam includes a middle beam, a front beam and a rear beam, the middle beam is fixedly arranged on a first adjusting rod, the front beam and the rear beam are respectively arranged on both sides of the middle beam and are fixedly connected to the middle beam, the middle beam is respectively provided with a third fixing member for fixing the front beam and a fourth fixing member for fixing the rear beam, the wire rope hanging head is arranged on the front beam, and the rear beam is fixedly connected to the second adjusting rod.

[0008] Optionally, a telescopic groove is formed at one end of the middle beam away from the rear beam along the length direction of the middle beam, and the front beam is slidably arranged in the telescopic groove along the length direction of the middle beam, and the third fixing member is used to prevent the front beam from sliding in the telescopic groove.

[0009] Optionally, a front lifting ear is fixedly provided on the front beam, a reinforcing steel wire rope is connected to the front lifting ear, an upper bracket is fixedly provided on the first adjusting rod, a pulley is rotatably provided on the top of the upper bracket, a rear lifting ear is fixedly provided on the second adjusting rod, the reinforcing steel wire rope passes around the pulley and the rear lifting ear in sequence, and is fixedly connected to the rear beam.

[0010] Optionally, a spiral buckle is fixedly connected to the reinforcing steel wire rope, a lug for connecting the spiral buckle is provided on the rear beam, the lug is movably arranged on the rear beam along the length direction of the rear beam, and a fifth fixing piece for fixing the lug is provided on the rear beam.

[0011] Optionally, a safety wire rope is fixedly connected to the wire rope hanging head of each set of the suspension mechanism, a heavy hammer is connected to the bottom of the safety wire rope, and a plurality of safety locks are arranged on the working platform, the safety locks correspond to the safety wire ropes one by one, and the safety locks are used to lock the corresponding safety wire ropes.

[0012] Optionally, the safety lock adopts an electric hanging basket safety lock, which is electrically connected to the electric control system. Angle sensors for detecting the vertical inclination angle of each safety wire rope are respectively provided on the working platform. Each of the angle sensors is electrically connected to the electric control system for controlling the opening and closing of the corresponding safety lock.

[0013] Optionally, a plurality of travel switches are provided on the working platform, the travel switches correspond one-to-one to the winches, and each of the travel switches is electrically connected to the electronic control system. A travel limit block is fixedly provided on the working wire rope of each winch and located above the working platform. The travel switch is used to abut the travel limit block on the working wire rope of the corresponding winch and control the corresponding winch to stop.

[0014] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application sets up a suspension mechanism, which utilizes the lever principle to hoist the work platform. When the suspension mechanism hoists the work platform, the front bracket acts as a fulcrum and is subjected to a small horizontal traction force, which can be directly offset by the friction between the front bracket and the building. The suspension mechanism is not easy to slide off the building. Therefore, it is only necessary to ensure that the counterweight on the rear bracket is sufficient to support the hoisting of the work platform. There is no need to reserve embedded steel bars to fix the suspension mechanism, which makes the installation of the hanging basket more convenient and quick, and greatly improves the flexibility of the installation of the hanging basket.

[0015] 2. This application facilitates transportation by combining the crossbeam consisting of a middle beam, a front beam and a rear beam, and by sliding the front beam on the middle beam, the working platform can adjust the distance from the building according to the structure of the building, and effectively overcomes the limitations of external segmented construction such as lifting frames and cantilever frames, thereby increasing practicality.

[0016] 3. The present application equips each winch with a set of safety wire ropes and safety locks on the working platform. When the working platform is working normally, the vertical groove of the safety wire rope is ensured to be vertical, and the vertical inclination angle of each safety wire rope is monitored in real time through the angle sensor. When the working platform is being lifted or lowered, if the working wire rope of the winch breaks, or there are differences in the winding and unwinding of the working wire ropes of each winch, the working platform will tilt, which will cause each safety wire rope to tilt together. When the inclination angle of the safety wire rope exceeds the preset value, the corresponding safety lock is controlled to close through the electronic control system, the safety wire rope is locked, and each winch is controlled to stop, thereby locking the work platform to the safety wire rope to ensure the safety of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 It is a structural schematic diagram used to express the suspension mechanism in the embodiment of the present application; Figure 3 It is a structural schematic diagram used to express the crossbeam in the embodiment of the present application; Figure 4 It is a structural diagram used to express the working platform in the embodiment of the present application.

[0018] Explanation of the accompanying drawings: 1. working platform; 11. electric control system; 12. winch; 13. safety lock; 14. angle sensor; 15. travel switch; 16. travel limit block; 2. suspension mechanism; 21. front bracket; 211. first adjusting rod; 212. first fixing piece; 213. upper bracket; 2131. pulley; 22. rear bracket; 221. second adjusting rod; 2211. rear lifting ear; 222. second fixing piece; 23. crossbeam; 231. middle beam; 232. front beam; 2321. front lifting ear; 233. rear beam; 2331. hanging ear; 2332. fifth fixing piece; 234. third fixing piece; 235. fourth fixing piece; 236. reinforcing wire rope; 2361. turnbuckle; 237. wire rope hanging head; 2371. safety wire rope; 2372. heavy hammer; 24. counterweight. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-4 This application is described in further detail.

[0020] The present application embodiment discloses a high-altitude operation safety hanging basket installation structure. Figure 1 , including a working platform 1, an electric control system 11 and a plurality of winches 12 arranged on the working platform 1, each winch 12 is electrically connected to the electric control system 11, the electric control system 11 is installed in the middle position of the working platform 1, and two winches 12 are provided and are arranged on both sides of the working platform 1.

[0021] Reference Figure 2 Each winch 12 is respectively provided with a corresponding suspension mechanism 2, the suspension mechanism 2 includes a front bracket 21, a rear bracket 22, a cross beam 23 and a counterweight 24, a first adjustment rod 211 is slidably provided on the front bracket 21, a first adjustment slot is opened on the front bracket 21, the first adjustment rod 211 is adapted to the first adjustment slot, and the first adjustment rod 211 is slidably provided in the first adjustment slot.

[0022] Reference Figure 2 A first fixing member 212 for preventing the first adjusting rod 211 from sliding is provided on the front bracket 21, and the first fixing member 212 includes a first bolt, and a first nut is adapted on the first bolt. A plurality of first mounting holes connected to the first adjusting groove are provided on the side wall of the front bracket 21, and each first mounting hole is distributed along the extension direction of the first adjusting groove. In the present application, two first mounting holes are provided, and both first mounting holes penetrate the front bracket 21. A plurality of first through holes are provided on the first adjusting rod 211 along the length direction of the first adjusting rod 211, and the spacing between two adjacent first through holes is equal to the spacing between the two first mounting holes on the front bracket 21.

[0023] Reference Figure 2 A second adjusting rod 221 is slidably arranged on the rear bracket 22, a first adjusting groove is provided on the rear bracket 22, the second adjusting rod 221 is adapted to the second adjusting groove, and the second adjusting rod 221 is slidably arranged in the second adjusting groove; a second fixing member 222 is provided on the rear bracket 22 for preventing the second adjusting rod 221 from sliding, the second fixing member 222 includes a second bolt, and a second nut is adapted on the second bolt. A plurality of second mounting holes connected to the second adjusting groove are provided on the side wall of the rear bracket 22, and each second mounting hole is distributed along the extension direction of the second adjusting groove. In the present application, two second mounting holes are provided, and both second mounting holes penetrate the rear bracket 22. A plurality of second through holes are provided on the second adjusting rod 221 along the length direction of the second adjusting rod 221, and the spacing between two adjacent second through holes is equal to the spacing between the two second mounting holes on the rear bracket 22.

[0024] Reference Figure 2There are multiple counterweight blocks 24 and they are all placed on the rear bracket 22. The weight of each counterweight block 24 is 25 kg. After each counterweight block 24 is placed on the rear bracket 22, the counterweight blocks 24 are connected in series and tied together through steel wire ropes, and then fixed with rope clips to prevent the counterweight blocks 24 from moving on the rear bracket 22.

[0025] Reference Figure 2 , 3 The cross beam 23 includes a middle beam 231, a front beam 232 and a rear beam 233. A first placement slot is provided on the first adjusting rod 211. The middle beam 231 is fixed in the first placement slot by bolts. One end of the middle beam 231 is provided with a telescopic slot along the length direction of the middle beam 231. The telescopic slot is adapted to the front beam 232, and the front beam 232 is slidably penetrated in the telescopic slot. A third fixing member 234 is provided on the middle beam 231 for preventing the front beam 232 from sliding. The third fixing member 234 includes a third bolt, and a third nut is adapted on the third bolt. A plurality of third mounting holes connected to the telescopic slot are provided on the side wall of the middle beam 231, and each third mounting hole is distributed along the length direction of the middle beam 231. In the present application, two third mounting holes are provided, and the two third mounting holes both penetrate the middle beam 231. A plurality of third through holes are provided on the front beam 232 along the length direction of the front beam 232, and the spacing between two adjacent third through holes is equal to the spacing between the two third mounting holes on the middle beam 231.

[0026] Reference Figure 3 One end of the rear beam 233 is provided with a mounting groove along the length direction of the rear beam 233, the mounting groove is adapted to the middle beam 231, and the middle beam 231 is penetrated in the mounting groove, and a fourth fixing member 235 for fixing the rear beam 233 is provided on the middle beam 231, the fourth fixing member 235 includes a fourth bolt, and the fourth bolt is adapted with a fourth nut, and a side wall of the rear beam 233 is provided with a plurality of fourth mounting holes connected with the mounting groove. In the present application, two fourth mounting holes are provided, and both fourth mounting holes pass through the middle beam 231, and a plurality of fourth through holes are provided on the middle beam 231, and the fourth mounting holes correspond to the fourth through holes one by one.

[0027] Reference Figure 3 A second placement groove is provided on the second adjusting rod 221, and the rear beam 233 is fixed in the second placement groove by bolts, and the distance between the second adjusting rod 221 and the first adjusting rod 211 is not less than the distance between the wire rope hanging head 237 and the first adjusting rod 211; the cross beam 23 is composed of a middle beam 231, a front beam 232 and a rear beam 233, which is convenient for transportation, and by sliding the front beam 232 on the middle beam 231, the working platform 1 can adjust the distance with the building according to the structure of the building, and effectively overcomes the limitations of segmented construction of external types such as lifting frames and cantilever frames, thereby increasing practicality.

[0028] Reference Figure 2 ,3 A front lifting ear 2321 is fixed to the front beam 232 by bolts, an upper bracket 213 is fixed to the first adjusting rod 211 and located above the middle beam 231 by bolts, a pulley 2131 is rotatably arranged on the top of the upper bracket 213, a rear lifting ear 2211 is fixedly arranged on the second adjusting rod 221, a hanging ear 2331 is fixedly arranged on the rear beam 233, the hanging ear 2331 is movably arranged on the rear beam 233 along the length direction of the rear beam 233, a fifth fixing piece 2332 for fixing the hanging ear 2331 is arranged on the rear beam 233, the fifth fixing piece 2332 includes a fifth bolt, and the fifth bolt is adapted with a fifth nut, a plurality of fifth mounting holes are opened on the side wall of the rear beam 233, and each of the fifth mounting holes is distributed along the length direction of the rear beam 233, and a fifth through hole for the fifth bolt to pass through is opened on the hanging ear 2331.

[0029] Reference Figure 2 , 3 A reinforcing steel wire rope 236 is fixedly connected to the front lifting ear 2321, and a spiral buckle 2361 is fixedly connected to the end of the reinforcing steel wire rope 236 away from the front lifting ear 2321. The reinforcing steel wire rope 236 passes around the pulley 2131 and the rear lifting ear 2211 in turn, and is fixedly connected to the hanging ear 2331 on the rear beam 233 through the spiral buckle 2361. By arranging the reinforcing steel wire rope 236, the structural strength of the front bracket 21 and the cross beam 23 is increased, and the bending of the cross beam 23 is effectively avoided.

[0030] Reference Figure 4 A wire rope head 237 is fixed with bolts on one side of the front beam 232 away from the middle beam 231, and the working wire rope of the winch 12 is fixedly connected to the wire rope head 237 on the corresponding suspension mechanism 2. The working platform 1 is hoisted on the wire rope head 237, and the working platform 1 is hoisted using the lever principle. When the suspension mechanism 2 is hoisting the working platform 1, the front bracket 21 is used as a fulcrum and is subjected to a small horizontal traction force, which can be directly offset by the friction between the front bracket 21 and the building. The suspension mechanism 2 is not easy to slide off the building. Therefore, it is only necessary to ensure that the counterweight on the rear bracket 22 is sufficient to support the hoisting of the working platform 1. There is no need to reserve embedded steel bars to fix the suspension mechanism 2, which makes the installation of the hanging basket more convenient and quick, and greatly improves the flexibility of the hanging basket installation.

[0031] Reference Figure 4A safety wire rope 2371 is fixedly connected to the wire rope head 237 of each suspension mechanism 2, and a weight 2372 is connected to the bottom of the safety wire rope 2371. A plurality of safety locks 13 are arranged on the working platform 1. The safety locks 13 correspond to the safety wire ropes 2371 one by one. The safety locks 13 adopt electric hanging basket safety locks, and the safety locks 13 are electrically connected to the electric control system 11. The safety locks 13 are inserted into the lock holes of the corresponding safety locks 13. The working wire ropes of the winch 12 are inserted between the large and small rollers of the corresponding safety locks 13. A plurality of angle sensors 14 are arranged on the working platform 1. The angle sensors 14 correspond to the safety wire ropes 2371 one by one, and the angle sensors 14 are used to detect the vertical tilt angle of the corresponding safety wire ropes 2371. Each angle sensor 14 is electrically connected to the electric control system 11 to control the opening and closing of the corresponding safety locks 13. The working platform 1 is equipped with a set of safety wire ropes 2371 and safety locks 13 for each winch 12. When the working platform 1 is working normally, the vertical groove of the safety wire rope 2371 is ensured to be vertical, and the vertical inclination angle of each safety wire rope 2371 is monitored in real time through the angle sensor 14. When the working platform 1 is being lifted or lowered, if the working wire rope of the winch 12 breaks, or there are differences in the winding and unwinding of the working wire ropes of each winch 12, the working platform 1 will tilt, which will drive the safety wire ropes 2371 to tilt together. When the inclination angle of the safety wire rope 2371 exceeds the preset value, the corresponding safety lock 13 is controlled to close through the electronic control system 11, the safety wire rope 2371 is locked, and the winches 12 are controlled to stop, so that the working platform 1 is locked on the safety wire rope 2371 to ensure the safety of construction.

[0032] Reference Figure 4 A plurality of travel switches 15 are provided on the working platform 1. The travel switches 15 correspond to the winches 12 one by one, and the travel switches 15 are fixed to the corresponding safety locks 13 by bolts. Each travel switch 15 is electrically connected to the electric control system 11. A travel limit block 16 is fixedly provided on the working wire rope of each winch 12 and above the working platform 1. The travel switch 15 is used to abut the travel limit block 16 on the working wire rope of the corresponding winch 12 and control the corresponding winch 12 to stop. The maximum travel height of the working platform 1 is controlled by the travel switch 15 and the travel limit block 16, so as to further improve the construction safety.

[0033] The implementation principle of the installation structure of a high-altitude working safety hanging basket in the embodiment of the present application is as follows: by setting up a hanging mechanism 2, the hanging mechanism 2 uses the lever principle to hang up the working platform 1, and when the hanging mechanism 2 hangs up the working platform 1, the front bracket 21 is used as a fulcrum, and the horizontal traction force it receives is small, which can be directly offset by the friction between the front bracket 21 and the building, and the hanging mechanism 2 is not easy to slide off the building, so it is only necessary to ensure that the counterweight on the rear bracket 22 is sufficient to support the working platform. By setting up the hanging mechanism 2, the hanging mechanism 2 uses the lever principle to hang up the working platform 1, and the hanging mechanism 2 is used in the hanging process. When working on the platform 1, the front bracket 21 serves as a fulcrum and is subject to a small horizontal traction force, which can be directly offset by the friction between the front bracket 21 and the building. The suspension mechanism 2 is not easy to slide off the building. Therefore, it is only necessary to ensure that the counterweight on the rear bracket 22 is sufficient to support the lifting of the working platform 1. There is no need to reserve embedded steel bars to fix the suspension mechanism 2, which makes the installation of the hanging basket more convenient and quick, and greatly improves the flexibility of the installation of the hanging basket.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A safety hanging basket installation structure for high-altitude operations, comprising a working platform (1), an electric control system (11) and a plurality of winches (12) arranged on the working platform (1), wherein each of the winches (12) is electrically connected to the electric control system (11), and characterized in that: Each winch (12) on the working platform (1) is respectively provided with a corresponding suspension mechanism (2), the suspension mechanism (2) comprising a front bracket (21), a rear bracket (22), a crossbeam (23) and a counterweight (24), the crossbeam (23) being respectively fixedly connected to the front bracket (21) and the rear bracket (22), a plurality of counterweights (24) being provided and placed on the rear bracket (22), a wire rope head (237) being fixedly provided on the crossbeam (23) and located on a side of the front bracket (21) away from the rear bracket (22), the working wire rope of the winch (12) being fixedly connected to the wire rope head (237) on the corresponding suspension mechanism (2), and the spacing between the rear bracket (22) and the front bracket (21) being not less than the spacing between the wire rope head (237) and the front bracket (21).

2. The installation structure of a safety hanging basket for high-altitude operations according to claim 1, characterized in that: A first adjusting rod (211) is slidably arranged on the front bracket (21), the crossbeam (23) is fixedly arranged on the first adjusting rod (211), and a first fixing member (212) for preventing the first adjusting rod (211) from sliding is arranged on the front bracket (21).

3. The installation structure of a safety hanging basket for high-altitude operations according to claim 2 is characterized in that: A second adjusting rod (221) is slidably arranged on the rear bracket (22), the second adjusting rod (221) is fixedly connected to the crossbeam (23), and a second fixing member (222) for preventing the second adjusting rod (221) from sliding is arranged on the rear bracket (22).

4. The installation structure of a safety hanging basket for high-altitude operations according to claim 3 is characterized in that: The cross beam (23) comprises a middle beam (231), a front beam (232) and a rear beam (233); the middle beam (231) is fixedly arranged on the first adjusting rod (211); the front beam (232) and the rear beam (233) are respectively arranged on both sides of the middle beam (231) and are both fixedly connected to the middle beam (231); the middle beam (231) is respectively provided with a third fixing member (234) for fixing the front beam (232) and a fourth fixing member (235) for fixing the rear beam (233); the wire rope hanging head (237) is arranged on the front beam (232); and the rear beam (233) is fixedly connected to the second adjusting rod (221).

5. The installation structure of a safety hanging basket for high-altitude operations according to claim 4 is characterized in that: An end of the middle beam (231) away from the rear beam (233) is provided with a telescopic groove along the length direction of the middle beam (231); the front beam (232) is slidably arranged in the telescopic groove along the length direction of the middle beam (231); and the third fixing member (234) is used to prevent the front beam (232) from sliding in the telescopic groove.

6. The installation structure of a safety hanging basket for high-altitude operations according to claim 5, characterized in that: A front lifting ear (2321) is fixedly provided on the front beam (232), and a reinforcing steel wire rope (236) is connected to the front lifting ear (2321); an upper bracket (213) is fixedly provided on the first adjusting rod (211), and a pulley (2131) is rotatably provided on the top of the upper bracket (213); a rear lifting ear (2211) is fixedly provided on the second adjusting rod (221), and the reinforcing steel wire rope (236) passes around the pulley (2131) and the rear lifting ear (2211) in sequence, and is fixedly connected to the rear beam (233).

7. The installation structure of a safety hanging basket for high-altitude operations according to claim 6, characterized in that: The reinforcing steel wire rope (236) is fixedly connected with a turnbuckle (2361), the rear beam (233) is provided with a hanging ear (2331) for connecting the turnbuckle (2361), the hanging ear (2331) is movably arranged on the rear beam (233) along the length direction of the rear beam (233), and the rear beam (233) is provided with a fifth fixing member (2332) for fixing the hanging ear (2331).

8. The installation structure of a safety hanging basket for high-altitude operations according to claim 1, characterized in that: A safety wire rope (2371) is fixedly connected to the wire rope hanging head (237) of each set of the suspension mechanism (2), and a weight (2372) is connected to the bottom of the safety wire rope (2371). A plurality of safety locks (13) are arranged on the working platform (1), and the safety locks (13) correspond to the safety wire ropes (2371) one by one, and the safety locks (13) are used to lock the corresponding safety wire ropes (2371).

9. The installation structure of a safety hanging basket for high-altitude operations according to claim 8, characterized in that: The safety lock (13) is an electric hanging basket safety lock, and the safety lock (13) is electrically connected to the electric control system (11). An angle sensor (14) for detecting the vertical tilt angle of each safety steel wire rope (2371) is respectively arranged on the working platform (1), and each angle sensor (14) is electrically connected to the electric control system (11) to control the opening and closing of the corresponding safety lock (13).

10. The installation structure of a safety hanging basket for high-altitude operations according to claim 1, characterized in that: The working platform (1) is provided with a plurality of travel switches (15), each of the travel switches (15) corresponding to a winch (12) one by one, and each of the travel switches (15) is electrically connected to an electric control system (11). A travel limit block (16) is fixedly provided on the working wire rope of each winch (12) and located above the working platform (1). The travel switch (15) is used to abut against the travel limit block (16) on the working wire rope of the corresponding winch (12) and control the corresponding winch (12) to stop.

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