Lifting device for tower crane

Abstract

The utility model relates to a lifting device for a tower crane. The lifting device comprises a driving assembly, a lifting assembly and a sliding rail, the sliding rail is used for being arranged on a tower crane crawling ladder, the lifting assembly is used for bearing an operator of the tower crane, one side of the lifting assembly is slidably connected with the sliding rail, and the lifting assembly can slide along the sliding rail to drive the operator to reach a preset position; the first end of the driving assembly is connected with the bottom end of the outer side wall of the side, provided with the tower crane ladder, of the tower crane, the second end of the driving assembly is connected with the top end of the lifting assembly through the top end of the tower crane, the third end of the driving assembly is connected with the bottom end of the lifting assembly, and the driving assembly is used for driving the lifting assembly to slide along the sliding rail; compared with a traditional mode of climbing to a cab of the tower crane, time is shortened, physical consumption is reduced, meanwhile, the falling risk caused by a wrong climbing mode is effectively avoided, the personal safety of operators is fundamentally guaranteed, and safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting devices, in particular to a lifting device for a tower crane. Background Art

[0002] At present, in the field of construction, tower cranes are one of the special equipment that is widely used and indispensable by various construction companies. However, the climbing method of tower cranes used in most construction sites is manual climbing with a safety belt and a steel ladder to reach the maintenance platform or the tower crane cockpit. This is a great test of the operator's physical strength. In order to save physical strength, some tower crane drivers even build a convenient aerial passage between the tower crane and the building, take the construction elevator to the floor where the tower crane passage is located, and then climb to the tower crane cockpit. This method poses a huge safety hazard. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of the utility model is to provide a lifting device for a tower crane, which has the advantage of being able to solve the problems of physical exertion, time consumption and safety hazards in the climbing process.

[0004] The above-mentioned utility model object of the utility model is achieved through the following technical solutions: a lifting device for a tower crane, comprising a driving assembly, a lifting assembly and a slide rail; the slide rail is used to be arranged on the tower crane ladder, the lifting assembly is used to carry the operator of the tower crane, one side of the lifting assembly is slidably connected to the slide rail, and the lifting assembly can slide along the slide rail to bring the operator to a preset position; the first end of the driving assembly is connected to the bottom end of the outer wall of the side of the tower crane where the tower crane ladder is provided, the second end of the driving assembly is connected to the top end of the lifting assembly through the top end of the tower crane, the third end of the driving assembly is connected to the bottom end of the lifting assembly, and the driving assembly is used to drive the lifting assembly to slide along the slide rail.

[0005] Preferably, the lifting device for a tower crane provided by the present utility model comprises a driving assembly including a driving motor and two pulling units, the driving motor being arranged at the bottom end of the outer wall of the side on which the tower crane is provided with a tower crane ladder, the output shaft of the driving motor being provided with two driving wheels, the driving wheels and the pulling units being arranged in a one-to-one correspondence, the two pulling units being arranged on the side on which the tower crane is provided with the tower crane ladder, the two pulling units being located on opposite sides of the slide rail, one end of the two pulling units being connected to the top end of the lifting assembly, the other end of the pulling unit being wound around the corresponding driving wheels and connected to the bottom end of the lifting assembly; when the output shaft of the driving motor drives the driving wheel to rotate clockwise, the driving wheel applies a pulling force to the lifting assembly through the pulling unit, so that the lifting assembly slides upward along the slide rail with the operator; when the output shaft of the driving motor drives the driving wheel to rotate counterclockwise, the driving wheel releases the pulling force applied to the lifting assembly, so that the lifting assembly slides downward along the slide rail with the operator under the action of its own gravity.

[0006] Preferably, the lifting device for a tower crane provided by the present invention, the pulling unit includes a steel wire rope, a fixed pulley, a first idler pulley and a second idler pulley, the fixed pulley is arranged at the top end of the tower crane on the side where the tower crane ladder is provided, the first idler pulley is arranged on the outer wall of the tower crane on the side where the tower crane ladder is provided and is arranged close to the drive motor, the second idler pulley is arranged at the bottom end of the tower crane on the side where the tower crane ladder is provided, one end of the steel wire rope passes around the fixed pulley and is connected to the top end of the lifting assembly, and the other end of the steel wire rope passes around the first idler pulley, the drive wheel and the second idler pulley in sequence and is connected to the bottom end of the lifting assembly.

[0007] Preferably, in the lifting device for a tower crane provided by the present invention, the lifting assembly includes a carrying frame and a control switch, the operator is used to stand in the carrying frame, a controller is provided on the inner side wall of the carrying frame, and the controller is provided with the control switch for controlling the drive assembly.

[0008] Preferably, in the lifting device for a tower crane provided by the present invention, a handrail is provided on the inner side wall of the carrying frame on the side where the control switch is provided, and the top end of the handrail extends to the outside of the carrying frame.

[0009] Preferably, in the lifting device for a tower crane provided by the present invention, the handrail adopts a telescopic rod with a self-locking function.

[0010] Preferably, the lifting device for a tower crane provided by the present invention, the bearing frame includes a guardrail, a base plate and a side-opening door, the bottom end of the guardrail is connected to the top surface of the base plate, the guardrail and the base plate together enclose a bearing space with an upper end opening, the control switch is arranged on the inner side wall of the guardrail on the side close to the slide rail, and an entrance for an operator to enter the bearing space is opened on the side of the guardrail away from the slide rail, the entrance is connected to the bearing space, the side-opening door is installed on the entrance, one end of the side-opening door is rotatably connected to the guardrail by a hinge, and the other end of the side-opening door is connected to the guardrail by a bolt.

[0011] Preferably, in the lifting device for a tower crane provided by the present invention, the carrying frame further comprises a foot plate, and the foot plate is arranged on the outer peripheral wall of one end of the guardrail close to the bottom plate.

[0012] Preferably, in the lifting device for a tower crane provided by the present invention, the height range of the guardrail is 1100mm-1500mm.

[0013] Preferably, in the lifting device for a tower crane provided by the present invention, the height range of the footboard is 150 mm-200 mm.

[0014] To sum up, the beneficial technical effects of the present invention are as follows: the lifting device for a tower crane provided in the present application includes a driving assembly, a lifting assembly and a slide rail; the slide rail is used to be arranged on the tower crane ladder, the lifting assembly is used to carry the operator of the tower crane, one side of the lifting assembly is slidably connected to the slide rail, and the lifting assembly can slide along the slide rail to carry the operator to a preset position; the first end of the driving assembly is connected to the bottom end of the outer wall of the tower crane on the side where the tower crane ladder is provided, the second end of the driving assembly is connected to the top of the lifting assembly through the top of the tower crane, and the third end of the driving assembly is connected to the bottom end of the lifting assembly, and the driving assembly is used to drive the lifting assembly to slide along the slide rail; compared with the traditional climbing to the tower crane cab, the time is shortened and the physical energy consumption is reduced. At the same time, the risk of falling caused by incorrect climbing methods is effectively avoided, which fundamentally guarantees the personal safety of the operator and improves safety; in addition, it provides the operator with more comfortable up and down passage conditions, and the operator can enter the working state more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a lifting device for a tower crane provided by an embodiment of the utility model.

[0016] Figure 2 It is a plan view of a lifting device for a tower crane provided by an embodiment of the utility model.

[0017] Figure 3 The utility model is a schematic structural diagram of a tower crane lifting device provided by an embodiment of the present invention being installed on a tower crane.

[0018] Figure 4 yes Figure 3 Enlarged view of point A.

[0019] Figure 5 It is a front view of a drive assembly in a lifting device for a tower crane provided by an embodiment of the utility model.

[0020] Figure 6 It is a side view of a drive assembly in a lifting device for a tower crane provided by an embodiment of the utility model.

[0021] In the figure, 1. lifting device; 10. driving assembly; 11. driving motor; 111. driving wheel; 12. pulling unit; 121. wire rope; 122. fixed pulley; 123. first idler pulley; 124. second idler pulley; 20. lifting assembly; 21. load-bearing frame; 211. guardrail; 212. bottom plate; 213. side door; 214. bolt; 22. control switch; 23. handrail; 24. footboard; 25. guide wheel; 30. slide rail; 40. fall arrester; 2. tower crane ladder; 3. tower crane. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below with reference to the accompanying drawings.

[0023] Reference Figures 1 to 4 The utility model discloses a lifting device 1 for a tower crane, comprising a driving assembly 10, a lifting assembly 20 and a slide rail 30; the slide rail 30 is used to be arranged on the tower crane ladder 2, the lifting assembly 20 is used to carry the operator of the tower crane, one side of the lifting assembly 20 is slidably connected to the slide rail 30, and the lifting assembly 20 can slide along the slide rail 30 to carry the operator to a preset position; the first end of the driving assembly 10 is connected to the bottom end of the outer wall of the tower crane 3 on the side where the tower crane ladder 2 is provided, and the second end of the driving assembly 10 is connected to the top of the tower crane 3. The first end of the driving assembly 10 is connected to the top of the lifting assembly 20, and the third end of the driving assembly 10 is connected to the bottom of the lifting assembly 20. The driving assembly 10 is used to drive the lifting assembly 20 to slide along the slide rail 30. Compared with the traditional climbing to the tower crane cab, this arrangement shortens the time and reduces physical energy consumption. At the same time, it effectively avoids the risk of falling due to incorrect climbing methods, fundamentally protects the personal safety of the operator, and improves safety. In addition, it provides more comfortable up and down travel conditions for the operator, and the operator can enter the working state more quickly.

[0024] Specifically, the slide rail 30 and the lifting assembly 20 are both arranged in the tower crane 3 , the slide rail 30 is connected to the tower crane ladder 2 , and the slide rail 30 extends along the length direction of the tower crane ladder 2 .

[0025] The lifting assembly 20 is provided with at least two pairs of guide wheels 25 adapted to the slide rail 30 on one side thereof, and the two pairs of guide wheels 25 are spaced apart along the length direction of the slide rail 30 .

[0026] Specifically, each pair of guide wheels 25 includes two guide wheels 25, and the two guide wheels 25 are respectively arranged on opposite sides of the slide rail 30. Both guide wheels 25 can slide along the slide rail 30. During use, the driving component 10 applies a pulling force to the lifting component 20, and the lifting component 20 slides along the slide rail 30 through the guide wheels 25.

[0027] It should be noted that there is a preset distance between the tower crane ladder 2 and the lifting assembly 20, which is not less than 150 mm, so that after the lifting assembly 20 reaches the preset position, the operator can enter the tower crane cabin through the tower crane ladder 2.

[0028] Continue to refer to Figure 5 and Figure 6 In this embodiment, the driving assembly 10 includes a driving motor 11 and two pulling units 12. The driving motor 11 is arranged at the bottom end of the outer wall of the side where the tower crane 3 is provided with the tower crane ladder 2. Two driving wheels 111 are arranged on the output shaft of the driving motor 11. The driving wheels 111 and the pulling units 12 are arranged in a one-to-one correspondence. The two pulling units 12 are both arranged on the side where the tower crane 3 is provided with the tower crane ladder 2. The two pulling units 12 are located on opposite sides of the slide rail 30. One end of the two pulling units 12 is connected to the top of the lifting assembly 20, and the other end of the pulling unit 12 is wrapped around the corresponding driving wheel 111 and connected to the bottom end of the lifting assembly 20.

[0029] Specifically, the drive motor 11 is arranged on the outer wall near the bottom end of the tower crane 3, and the drive motor 11 is located on the outer wall on the side of the tower crane 3 where the tower crane ladder 2 is provided, and the two pulling units 12 are both arranged on the side of the tower crane 3 where the tower crane ladder 2 is provided.

[0030] When the output shaft of the drive motor 11 drives the drive wheel 111 to rotate clockwise, the drive wheel 111 applies a pulling force to the lifting assembly 20 through the pulling unit 12, so that the lifting assembly 20 slides upward along the slide rail 30 with the operator; when the output shaft of the drive motor 11 drives the drive wheel 111 to rotate counterclockwise, the drive wheel 111 releases the pulling force applied to the lifting assembly 20, so that the lifting assembly 20 slides downward along the slide rail 30 with the operator under the action of its own gravity.

[0031] Furthermore, in this embodiment, the pulling unit 12 includes a wire rope 121, a fixed pulley 122, a first idler pulley 123 and a second idler pulley 124. The fixed pulley 122 is arranged at the top of the side of the tower crane 3 where the tower crane ladder 2 is provided, the first idler pulley 123 is arranged on the outer wall of the side of the tower crane 3 where the tower crane ladder 2 is provided, and is arranged close to the drive motor 11, and the second idler pulley 124 is arranged at the bottom end of the side of the tower crane 3 where the tower crane ladder 2 is provided. One end of the wire rope 121 passes around the fixed pulley 122 and is connected to the top of the lifting assembly 20, and the other end of the wire rope 121 passes around the first idler pulley 123, the driving wheel 111 and the second idler pulley 124 in sequence and is connected to the bottom end of the lifting assembly 20.

[0032] Specifically, the center lines of the fixed pulley 122 , the first idler pulley 123 , and the second idler pulley 124 are all arranged parallel to the center line of the output shaft of the drive motor 11 .

[0033] When the output shaft of the drive motor 11 drives the drive wheel 111 to rotate clockwise, the drive wheel 111 winds the wire rope 121 so that the wire rope 121 applies tension to the lifting assembly 20, so that the lifting assembly 20 slides upward along the slide rail 30 with the operator; when the output shaft of the drive motor 11 drives the drive wheel 111 to rotate counterclockwise, the drive wheel 111 releases the wire rope 121, so that the tension of the wire rope 121 on the lifting assembly 20 is released, and the lifting assembly 20 slides downward along the slide rail 30 with the operator under the action of its own gravity.

[0034] Continue to refer to Figures 1 to 4 In this embodiment, the lifting assembly 20 includes a carrying frame 21 and a control switch 22. The operator stands in the carrying frame 21. A controller is provided on the inner wall of the carrying frame 21. The controller is provided with a control switch 22 for controlling the drive assembly 10. By setting the control switch 22, the operator can control the start of the drive motor 11 by himself.

[0035] Specifically, the side of the supporting frame 21 facing the slide rail 30 is slidably connected to the slide rail 30 through the guide wheel 25, one end of the wire rope 121 passes around the fixed pulley 122 and is connected to the top of the supporting frame 21, and the other end of the wire rope 121 passes around the first idler wheel 123, the driving wheel 111 and the second idler wheel 124 in sequence and is connected to the bottom end of the supporting frame 21.

[0036] The control switch 22 is used to control the start and stop of the drive motor 11; the controller is also provided with a lifting button for controlling the reverse rotation of the drive motor.

[0037] Furthermore, in this embodiment, an armrest 23 is provided on the inner wall of the supporting frame 21 on the side where the control switch 22 is provided, and the top end of the armrest 23 extends to the outside of the supporting frame 21; by providing the armrest 23, during the operation of the lifting assembly 20, the operator holds the armrest 23, thereby improving the safety of the operator.

[0038] For example, the armrest 23 may be a telescopic rod with a self-locking function; of course, the armrest 23 may also be a U-shaped rod. When the armrest 23 is a telescopic rod with a self-locking function, Figure 1 As shown, two telescopic rods are provided on the inner side wall of the carrying frame 21, and the two telescopic rods are provided on opposite sides of the controller; with such a configuration, the height of the telescopic rods can be adjusted according to the height of the operator, thereby improving the applicability.

[0039] Among them, the minimum height of the telescopic rod is 1200mm.

[0040] Furthermore, in this embodiment, the carrying frame 21 includes a guardrail 211, a bottom plate 212 and a side-opening door 213. The bottom end of the guardrail 211 is connected to the top surface of the bottom plate 212. The guardrail 211 and the bottom plate 212 together enclose a carrying space with an open upper end. The control switch 22 is arranged on the inner side wall of the guardrail 211 on the side close to the slide rail 30. The side of the guardrail 211 away from the slide rail 30 is provided with an entrance for the operator to enter the carrying space. The entrance is connected to the carrying space, and the side-opening door 213 is installed on the entrance. One end of the side-opening door 213 is rotatably connected to the guardrail 211 by a hinge, and the other end of the side-opening door 213 is connected to the guardrail 211 by a bolt 214.

[0041] Specifically, the guardrail 211 is enclosed in a rectangular parallelepiped shape, and the bottom end of the guardrail 211 is connected to the top surface of the bottom plate 212 .

[0042] It should be noted that the minimum size of the base plate 212 should meet the actual needs on site.

[0043] The height of the guardrail 211 ranges from 1100 mm to 1500 mm. In this embodiment, the height of the guardrail 211 is 1200 mm.

[0044] During use, the operator opens the door bolt 214 and then rotates the side door 213 to open the entrance. The operator enters the carrying space through the entrance and then closes the side door 213 and the door bolt 214 .

[0045] Furthermore, in this embodiment, the supporting frame 21 further includes a footboard 24 , which is disposed on the outer peripheral wall of the guardrail 211 at one end close to the bottom plate 212 . The provision of the footboard 24 further improves safety.

[0046] The height of the footboard 24 is in the range of 150 mm to 200 mm. In this embodiment, the height of the footboard 24 is 180 mm.

[0047] After the lifting assembly 20 reaches the preset position, in order to facilitate the operator to climb onto the tower crane ladder 2, the supporting frame 21 is provided with multiple foot pedals on the inner wall on the side with the control switch 22, and the multiple foot pedals are arranged at intervals along the height direction of the supporting frame 21.

[0048] In order to further improve the safety of operators during the up and down movement, the lifting device 1 for tower crane provided in this embodiment also includes a fall arrester 40, which is slidably connected to the slide rail 30, and the lock of the fall arrester 40 is used to connect to the operator's own safety belt.

[0049] Among them, the fall arrester adopts a rail-type fall arrester, and the connection structure between the fall arrester and the slide rail is well known to those skilled in the art and will not be described in detail here.

[0050] It should be noted that the fall arrester will not interfere with the sliding of the lifting assembly along the slide rail.

[0051] During use, the fall arrester 40 slides along the slide rail 30 as the lifting assembly 20 moves with the operator; when the operator encounters a risk of falling, the speed at which the fall arrester slides along the slide rail is significantly accelerated. At this time, the fall arrester is locked with the slide rail to prevent the fall arrester from sliding along the slide rail, and the speed at which the safety rope in the fall arrester is pulled out is significantly accelerated. At this time, the locking system in the fall arrester is automatically activated, quickly locking the safety rope to prevent the person from continuing to fall; when the fall event is over, the load is released, and the fall arrester automatically returns to its working state.

[0052] The use process of the lifting device 1 for a tower crane provided in this embodiment is as follows: the operator opens the door bolt 214, and then rotates the side door 213 to open the entrance. The operator enters the carrying space through the entrance (i.e., stands on the base plate 212), and then rotates the side door 213 to close the door bolt 214, connects the lock of the anti-fall device 40 to the operator's own safety belt, the operator holds the handrail 23 with both hands, and confirms again that the side door 213 is closed. After the lock of the anti-fall device 40 is fastened, the control switch 22 is clicked to start the drive motor 11. After the lifting assembly 20 slides to the preset position along the slide rail 30, the operator climbs up the tower crane ladder 2 through the foot pedal and reaches the maintenance platform or the tower crane cabin through the tower crane ladder 2.

[0053] The tower crane lifting device 1 provided in the present application includes a drive assembly 10, a lifting assembly 20 and a slide rail 30; the slide rail 30 is used to be set on the tower crane ladder 2, and the lifting assembly 20 is used to carry the tower crane operator. One side of the lifting assembly 20 is slidably connected to the slide rail 30, and the lifting assembly 20 can slide along the slide rail 30 to carry the operator to a preset position; the first end of the drive assembly 10 is connected to the bottom end of the outer wall of the tower crane 3 on the side where the tower crane ladder 2 is provided, the second end of the drive assembly 10 is connected to the top of the lifting assembly 20 through the top of the tower crane 3, and the third end of the drive assembly 10 is connected to the bottom end of the lifting assembly 20, and the drive assembly 10 is used to drive the lifting assembly 20 to slide along the slide rail 30; compared with the traditional climbing to the tower crane cab, the time is shortened and the physical energy consumption is reduced. At the same time, the risk of falling caused by incorrect climbing methods is effectively avoided, thereby fundamentally ensuring the personal safety of the operator and improving safety; in addition, more comfortable up and down passage conditions are provided for the operator, and the operator can enter the working state more quickly.

[0054] The lifting device 1 for a tower crane provided by the utility model has the following advantages: the device has a simple structure, is easy to manufacture, is safe and stable, and is easy to operate.

[0055] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0056] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A lifting device for a tower crane, characterized in that: Including driving components, lifting components and slide rails; The slide rail is used to be arranged on the tower crane ladder, and the lifting assembly is used to carry the operator of the tower crane. One side of the lifting assembly is slidably connected to the slide rail, and the lifting assembly can slide along the slide rail to carry the operator to a preset position; The first end of the driving assembly is connected to the bottom end of the outer wall of the tower crane on the side where the tower crane ladder is provided, the second end of the driving assembly is connected to the top end of the lifting assembly through the top end of the tower crane, and the third end of the driving assembly is connected to the bottom end of the lifting assembly. The driving assembly is used to drive the lifting assembly to slide along the slide rail.

2. The lifting device for a tower crane according to claim 1, wherein: The driving assembly includes a driving motor and two pulling units, the driving motor is arranged at the bottom end of the outer wall of the side of the tower crane where the tower crane ladder is provided, and two driving wheels are provided on the output shaft of the driving motor, and the driving wheels are arranged in a one-to-one correspondence with the pulling units. The two pulling units are both arranged on the side of the tower crane where the tower crane ladder is provided, and the two pulling units are located on opposite sides of the slide rail. One end of the two pulling units is connected to the top end of the lifting assembly, and the other end of the pulling unit is wound around the corresponding driving wheel and connected to the bottom end of the lifting assembly; When the output shaft of the drive motor drives the drive wheel to rotate clockwise, the drive wheel applies a pulling force to the lifting assembly through the pulling unit, so that the lifting assembly slides upward along the slide rail with the operator; When the output shaft of the drive motor drives the drive wheel to rotate counterclockwise, the drive wheel releases the pulling force applied to the lifting assembly, so that the lifting assembly slides downward along the slide rail with the operator under the action of its own weight.

3. The lifting device for a tower crane according to claim 2, wherein: The pulling unit includes a steel wire rope, a fixed pulley, a first idler pulley and a second idler pulley. The fixed pulley is arranged at the top of the side of the tower crane where the tower crane ladder is provided. The first idler pulley is arranged on the outer wall of the side of the tower crane where the tower crane ladder is provided and is close to the drive motor. The second idler pulley is arranged at the bottom end of the side of the tower crane where the tower crane ladder is provided. One end of the steel wire rope passes around the fixed pulley and is connected to the top of the lifting assembly, and the other end of the steel wire rope passes around the first idler pulley, the driving wheel and the second idler pulley in sequence and is connected to the bottom end of the lifting assembly.

4. The lifting device for a tower crane according to claim 1, wherein: The lifting assembly includes a carrying frame and a control switch. The operator is used to stand in the carrying frame. A controller is provided on the inner side wall of the carrying frame. The controller is provided with the control switch for controlling the driving assembly.

5. The lifting device for a tower crane according to claim 4, wherein: An armrest is provided on the inner side wall of the carrying frame on the side where the control switch is provided, and the top end of the armrest extends to the outside of the carrying frame.

6. The lifting device for a tower crane according to claim 5, wherein: The armrest adopts a telescopic rod with a self-locking function.

7. The lifting device for a tower crane according to claim 4, wherein: The carrying frame includes a guardrail, a base plate and a side-opening door. The bottom end of the guardrail is connected to the top surface of the base plate. The guardrail and the base plate together enclose a carrying space with an open upper end. The control switch is arranged on the inner side wall of the guardrail on the side close to the slide rail. The side of the guardrail away from the slide rail is provided with an entrance for operators to enter the carrying space. The entrance is connected to the carrying space. The side-opening door is installed on the entrance. One end of the side-opening door is rotatably connected to the guardrail by a hinge, and the other end of the side-opening door is connected to the guardrail by a bolt.

8. The lifting device for a tower crane according to claim 7, wherein: The supporting frame further comprises a foot plate, and the foot plate is arranged on the outer peripheral wall of one end of the guardrail close to the bottom plate.

9. The lifting device for a tower crane according to claim 7, wherein: The height range of the guardrail is 1100mm-1500mm.

10. The lifting device for a tower crane according to claim 8, wherein: The height range of the footboard is 150mm-200mm.

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