Engineering ladder and building installation equipment

Abstract

The utility model discloses an engineering ladder and building installation equipment. The engineering ladder comprises a base, a lifting mechanism, a working platform, an installation lifting table and a protection structure. The lifting mechanism is arranged on the base; the working platform is movably arranged on the base, and the lifting mechanism is used for driving the working platform to lift; the mounting lifting table is arranged on the working platform and is used for lifting and carrying; the protection structures are arranged on the side edges of the periphery of the working platform. According to the mechanical and electrical installation engineering ladder, the working platform can reach the proper height through the lifting mechanism, the lifting table is operated and installed according to the adjusted height of the working platform, and the flexibility and practicability of the mechanical and electrical installation engineering ladder are improved; therefore, the technical problems of adjusting the proper height according to needs and protecting workers during mechanical and electrical installation are solved as much as possible.

Description

Technical Field

[0001] This application relates to the field of ladder installation technology, and in particular to an engineering ladder and building installation equipment. Background Technology

[0002] As an auxiliary tool in building electromechanical installation engineering, ladders are essential for workers to perform tasks at different heights during the construction of various buildings and their ancillary facilities, including the installation of electrical, water supply and drainage, HVAC, and communication lines, pipes, and equipment. Traditional ladders have limitations in adjusting their height and angle, failing to meet the needs of different working conditions.

[0003] With the continuous development of construction engineering, mechanical and electrical installation ladders are also constantly being innovated and improved to adapt to more complex and varied installation needs. For example, patent CN214273480U discloses an engineering ladder for installing mechanical and electrical equipment in construction, whose design is based on safety and practicality to meet the needs of different working conditions. However, when using the above technology, the following technical problems have been found: the existing engineering ladders have a fixed height and cannot be flexibly adjusted according to specific needs, and there is no installation platform at the top for workers to work on, which is dangerous for workers. Therefore, there is room for improvement. Summary of the Invention

[0004] The purpose of this application is to at least solve one of the technical problems existing in the prior art. To this end, this application proposes an engineering ladder that can solve, as far as possible, the technical problems of adjusting the height as needed and protecting workers during electromechanical installation.

[0005] This application also proposes a building installation device that includes the aforementioned engineering ladder.

[0006] The engineering ladder according to the first aspect of this application includes:

[0007] Base;

[0008] A lifting mechanism is mounted on the base.

[0009] A work platform is movably mounted on the base, and the lifting mechanism is used to drive the work platform to move up and down;

[0010] Install a lifting platform, set on the work platform, and use it for lifting and transporting.

[0011] The protective structure is located on each of the surrounding sides of the work platform.

[0012] The engineering ladder according to the first aspect of this application has at least the following beneficial effects: the lifting mechanism enables the work platform to reach a suitable height, and the installation lifting platform can be operated according to the adjusted height of the work platform, thereby improving the flexibility and practicality of the electromechanical installation engineering ladder. Furthermore, a protective structure is provided on the work platform, thereby solving as much as possible the technical problems of adjusting the height as needed and protecting workers during electromechanical installation.

[0013] According to the engineering ladder of the first aspect of this application, the lifting mechanism includes a first driving member, a threaded screw, and a threaded tube. The first driving member is disposed on the base and connected to the threaded screw. The threaded screw is disposed inside the threaded tube, and the threaded tube is connected to the working platform. The first driving member drives the threaded screw to rotate, thereby driving the threaded tube and the working platform to rise and fall.

[0014] According to the engineering ladder of the first aspect of this application, the lifting mechanism includes a strength connecting rod, a guide column and a guide tube. The guide column is disposed on the base, the guide tube is sleeved on the guide column and connected to the working platform, and the strength connecting rod is disposed between adjacent guide tubes on the same side.

[0015] According to the engineering ladder of the first aspect of this application, the protective structure includes guardrails arranged opposite to each other, and sliding doors are slidably connected between the two ends of each guardrail.

[0016] According to the engineering ladder of the first aspect of this application, the top of the guardrail is provided with a support column, the support column is used to support the installation lifting platform, and a reinforcing support rod is provided between the installation lifting platform and the support column.

[0017] According to the engineering ladder of the first aspect of this application, the installation lifting platform includes a second driving member, a rotating rod, a support base, a reel, and a traction rope. The rotating rod is disposed on the support base and connected to the second driving member. The reel is disposed on the rotating rod and the traction rope is wound around it. The second driving member drives the rotating rod to rotate, thereby driving the reel to wind up and unwind the traction rope.

[0018] According to the engineering ladder of the first aspect of this application, the engineering ladder further includes a climbing structure that can be extended and adjusted along the length direction, and one end of the climbing structure in the length direction is hinged to the working platform.

[0019] According to the engineering ladder of the first aspect embodiment of this application, the ladder structure includes a connecting seat, a rotating shaft, a cylindrical tube, foot pedals and telescopic rods. The connecting seats are disposed opposite to each other on the working platform. The rotating shaft is rotatably disposed between two of the connecting seats. Two cylindrical tubes are disposed at intervals on the rotating shaft. Each telescopic rod is disposed on each of the cylindrical tubes. Each telescopic rod includes a plurality of telescopic parts, and foot pedals are disposed between each of the opposite telescopic parts.

[0020] According to the engineering ladder of the first aspect of this application, a limiting member is provided between the top of the telescopic rod and the cylinder, and a grounding seat is provided at the bottom of the telescopic rod;

[0021] And / or the bottom of the base is provided with self-locking casters.

[0022] The building installation equipment according to the second aspect of this application includes: an engineering ladder as described in the first aspect of this application.

[0023] It is easy to understand that the building installation equipment in the second aspect embodiment of this application has the same technical effects as the engineering ladder in the first aspect embodiment, and therefore will not be described again.

[0024] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0025] The present application will be further described below with reference to the accompanying drawings and embodiments;

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0027] Figure 2 This is a schematic diagram illustrating the connection between the seat and the work platform in an embodiment of this application;

[0028] Figure 3 for Figure 2 Enlarged view of A in the middle;

[0029] Figure 4 for Figure 2 Enlarged view of B in the middle;

[0030] Figure 5 This is a schematic diagram of the protective structure in an embodiment of this application.

[0031] Figure label:

[0032] 1. Base; 2. Working platform; 3. Mounting lifting platform; 4. First drive component; 5. Threaded screw; 6. Threaded tube; 7. Guide column; 8. Guide tube; 9. Connecting seat; 10. Rotary shaft; 11. Spool; 12. Foot pedal; 13. Limiting component; 14. Telescopic rod; 15. Strength connecting rod; 16. Grounding seat; 17. Second drive component; 18. Rotating rod; 19. Support seat; 20. Winding wheel; 21. Traction rope; 22. Lifting plate; 23. Guardrail; 24. Sliding door; 25. Self-locking caster wheel; 26. Support rod; 27. Reinforcing support rod. Detailed Implementation

[0033] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0034] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] In the description of this application, "several" means one or more, "more than" means at least two, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0036] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of the above terms in this application after considering the specific content of the technical solution.

[0037] Reference Figures 1 to 5 The engineering ladder of the first aspect of this application can be an electromechanical installation engineering ladder. The engineering ladder includes a base 1, a lifting mechanism, a work platform 2, an installation lifting platform 3, and a protective structure.

[0038] The lifting mechanism is mounted on the base 1; the work platform 2 is movably mounted on the base 1, and the lifting mechanism is used to drive the work platform 2 to rise and fall; the mounting lifting platform 3 is mounted on the work platform 2 and is used for lifting and transporting; the protective structure is located on each side of the work platform 2.

[0039] Understandably, by using a lifting mechanism to allow the work platform 2 to reach a suitable height, and by operating the installation lifting platform 3 according to the adjusted height of the work platform 2, the flexibility and practicality of the electromechanical installation ladder are improved. Furthermore, a protective structure is installed on the work platform 2, thereby solving as much as possible the technical problems of adjusting the height as needed and protecting workers during electromechanical installation.

[0040] In some embodiments, a working platform 2 is mounted on the top of the base 1, a mounting lifting platform 3 is mounted on the top of the working platform 2, a height adjustment mechanism is mounted between the base 1 and the working platform 2, and an electromechanical equipment lifting mechanism is mounted on the top of the mounting lifting platform 3.

[0041] In some embodiments of this application, the lifting mechanism includes a first driving member 4, a threaded screw 5, and a threaded tube 6. The first driving member 4 is mounted on the base 1 and connected to the threaded screw 5. The threaded screw 5 is disposed inside the threaded tube 6, which is connected to the working platform 2. The first driving member 4 drives the threaded screw 5 to rotate, thereby raising and lowering the threaded tube 6 and the working platform 2. It is understood that the first driving member 4, mounted on the base 1, provides the driving force, and the threaded screw 5 and threaded tube 6 serve as transmission components, enabling the working platform 2 to rise and fall, thus meeting different installation height requirements.

[0042] In some embodiments of this application, the lifting mechanism includes a strength connecting rod 15, a guide column 7, and a guide tube 8. The guide column 7 is mounted on the base 1, and the guide tube 8 is sleeved on the guide column 7 and connected to the working platform 2. The strength connecting rod 15 is positioned between adjacent guide tubes 8 on the same side. It is understood that the cooperation between the guide column 7 and the guide tube 8 provides a guiding function, thereby increasing the lifting accuracy. A strength connecting rod 15 is fixed between the two guide tubes 8, strengthening the connection between them and extending the service life of the electromechanical installation ladder.

[0043] In some embodiments, the height adjustment mechanism includes a first motor, a threaded screw 5, a threaded tube 6, a guide post 7, and a guide tube 8. The first motor is fixed to the top inner side of the base 1, and the threaded screw 5 is fixed to the power output end of the first motor. The threaded tube 6 is threadedly connected to the outside of the threaded screw 5. The top of the threaded tube 6 is fixed to the working platform 2. Guide posts 7 are fixed to the four corners of the top of the base 1. Guide tubes 8 are slidably connected to the outside of the guide posts 7. The tops of the multiple guide tubes 8 are all fixed to the working platform 2. When height adjustment is required, the first motor is started. The power output end of the first motor drives the threaded screw 5 to rotate. The threaded screw 5 drives the threaded tube 6, and the threaded tube 6 drives the working platform 2 to adjust its height. The guide tube 8 slides outside the guide post 7 and has a guiding function.

[0044] In some embodiments of this application, the protective structure includes guardrails 23 arranged opposite each other, with sliding doors 24 slidably connected between the two ends of each guardrail 23. It is understood that the guardrails 23 and sliding doors 24 form a protective structure to ensure installation and reduce the danger to workers. The sliding doors 24 can be opened and closed to facilitate entry, exit, and work.

[0045] In some embodiments, guardrails 23 are fixed at both ends of the top of the work platform 2, and sliding doors 24 are slidably connected to both ends of the inner sides of the two sets of guardrails 23. A door handle is fixed to one end of one side of the sliding door 24. By setting up two sets of sliding doors 24 and door handles, the sliding door 24 and door handle on the side near the connecting seat 9 can be opened when the workers go up or down the work platform 2, and the sliding door 24 and door handle on the other side can be opened when the electromechanical equipment is lifted. The door is closed when the workers are working, which provides work protection for the workers and avoids accidents such as falls from heights.

[0046] In some embodiments of this application, the top of the guardrail 23 is provided with a support post for supporting the installation lifting platform 3, and a reinforcing support rod 27 is provided between the installation lifting platform 3 and the support post. It is understood that the support post and the reinforcing support rod 27 are used to stably support the installation lifting platform 3, ensuring the stability of the lifting.

[0047] In some embodiments, a support rod 26 is fixed to one side of the top of the two guardrails 23, the top of the support rod 26 is fixed to the mounting lifting platform 3, and a reinforcing support rod 27 is fixed between the support rod 26 and the mounting lifting platform 3; the guardrails 23 and the mounting lifting platform 3 are connected by the support rod 26, and the connection strength between the mounting lifting platform 3 and the guardrails 232 is strengthened by the reinforcing support rod 27, so that the lifting equipment can be used safely for a long time.

[0048] In some embodiments of this application, the mounting lifting platform 3 includes a second driving member 17, a rotating rod 18, a support base 19, a reel 20, and a traction rope 21. The rotating rod 18 is mounted on the support base 19 and connected to the second driving member 17. The reel 20 is mounted on the rotating rod 18 and the traction rope 21 is wound around it. The second driving member 17 drives the rotating rod 18 to rotate, thereby causing the reel 20 to wind up and down the traction rope 21. It is understood that the second driving member 17 provides driving force, and the rotating rod 18 acts as a transmission component to drive the reel 20 to rotate forward or backward, thus enabling the traction rope 21 wound around the reel 20 to be wound up and down.

[0049] In some embodiments, the electromechanical equipment lifting mechanism includes a second motor, a rotating rod 18, a support base 19, winding reels 20, Y-shaped steel wire ropes, and a lifting plate 22. The second motor is fixed to one end of the top of the lifting platform 3, and the rotating rod 18 is fixed to the power output end of the second motor. Two support bases 19 are fixed to the top of the lifting platform 3, and the rotating rod 18 and the two support bases 19 are rotatably connected. Two winding reels 20 are fixed to the outside of the rotating rod 18, and Y-shaped steel wire ropes are wound around the inner sides of the winding reels 20. The lifting plate 22 is fixed to the bottom of the two Y-shaped steel wire ropes. When the electromechanical equipment needs to be lifted... The second motor is started and rotates in both directions. The power output of the second motor drives the rotating rod 18 to rotate, and the rotating rod 18 drives the two take-up and release reels 20 to rotate. By rotating the take-up and release reels 20 in both directions, the Y-shaped steel wire rope is taken up and released, thereby raising and lowering the lifting plate 22. The electromechanical equipment is placed on the lifting plate 22 to achieve the lifting of the electromechanical equipment. When the lifting plate 22 is raised to a suitable height, the door handle on the side near the lifting plate 22 is pulled. The door handle drives the sliding door 24 to slide, which can open the sliding door 24, and then the electromechanical equipment can be pulled into the top of the work platform 2 for easy installation.

[0050] In some embodiments of this application, the engineering ladder further includes a ladder structure that can be telescopically adjusted along its length, with one end of the ladder structure hinged to the work platform 2 along its length. It is understood that the ladder structure can be adaptively telescopically adjusted when the work platform 2 is raised or lowered, thereby facilitating the work of the personnel.

[0051] In some embodiments of this application, the ladder structure includes a connecting seat 9, a rotating shaft 10, a cylindrical tube 11, a foot pedal 12, and a telescopic rod 14. The connecting seats 9 are disposed opposite each other on the work platform 2. The rotating shaft 10 is rotatably disposed between two connecting seats 9. Two cylindrical tubes 11 are disposed at intervals on the rotating shaft 10. Each telescopic rod 14 is disposed on a cylindrical tube 11. Each telescopic rod 14 includes multiple telescopic parts, and a foot pedal 12 is disposed between each of the opposite telescopic parts. It can be understood that the cylindrical tube 11, the foot pedal 12, and the telescopic rod 14 constitute a telescopically adjustable ladder. The arrangement of the connecting seats 9 and the rotating shaft 10 allows the ladder structure to swing, thereby adapting to the work platform 2 after lifting and lowering.

[0052] In some embodiments of this application, a limiting member 13 is provided between the top of the telescopic rod 14 and the cylinder 11, and a grounding seat 16 is provided at the bottom of the telescopic rod 14. It is understood that the limiting member 13 can prevent the telescopic rod 14 from being pulled out excessively, and the grounding seat 16 can be fixed to the ground after the telescopic rod 14 is extended or retracted, or fixed to the ground first so that the telescopic rod 14 extends and retracts synchronously with the working platform 2.

[0053] In some embodiments, the height adjustment mechanism further includes a connecting seat 9, a rotating shaft 10, a cylindrical tube 11, a first connecting rod, a limiting head, a telescopic rod 14, a second connecting rod, and a grounding seat 16. Two connecting seats 9 are fixed on one side of the work platform 2. A rotating shaft 10 is fixed inside the two connecting seats 9. Two cylindrical tubes 11 are rotatably connected to the outside of the rotating shaft 10. The foot pedal 12 at the upper inner side of the two cylindrical tubes 11 serves as a first connecting rod. Multiple sets of telescopic rods 14 are slidably connected inside the cylindrical tubes 11. A limiting head is fixed at the top of the telescopic rod 14. The head, the inner side of the two telescopic rods 14, and the remaining foot pedals 12 serve as the second connecting rods. The bottom inner side of one of the telescopic rods 14 is rotatably connected to the grounding seat 16 by a pin. When the working platform 2 is adjusted to the required height, the second connecting rod is pulled. The second connecting rod drives multiple sets of telescopic rods 14 to slide. The limiting head prevents it from being pulled out. The grounding seat 16 rotates to make full contact with the ground. The two cylindrical tubes 11 rotate around the rotating shaft 10 at a certain angle, which makes adaptive adjustment according to the adjusted height of the working platform 2, thereby facilitating the workers to get on and off the working platform 2.

[0054] In some embodiments of this application, the bottom of the base 1 is provided with self-locking casters 25. It is understood that the bottom of the base 1 is fixed with self-locking casters 25; the self-locking casters 25 facilitate the movement of the electromechanical installation ladder.

[0055] In some embodiments, self-locking casters 25 are fixed at the four corners of the bottom of the base 1.

[0056] In some embodiments of this application, the usage process is as follows:

[0057] When the height needs to be adjusted, the first drive component 4 is fixed to the top inner side of the working platform 2, the power output end of the first drive component 4 is fixed to the threaded screw 5, the threaded screw 5 is connected to the threaded tube 6 on the outside, the top of the threaded tube 6 is fixed to the working platform 2, the four corners of the top of the base 1 are fixed to the guide post 7, the top of the guide post 7 is slidably connected to the guide tube 8, the top of the multiple guide tubes 8 is fixed to the working platform 2, thereby activating the first drive component 4, the power output end of the first drive component 4 drives the threaded screw 5 to rotate, the threaded screw 5 drives the threaded tube 6, the threaded tube 6 drives the working platform 2 to adjust the height, and the guide tube 8 slides outside the guide post 7 to guide;

[0058] Once the height of the work platform 2 is adjusted as needed, two connecting seats 9 are fixed on one side of the work platform 2. Inside the two connecting seats 9 is a rotating shaft 10. Two cylindrical tubes 11 are rotatably connected to the outside of the rotating shaft 10. A foot pedal 12 is fixed to the telescopic rod 14 between the two cylindrical tubes 11. A limit head and the telescopic rod 14 are slidably connected inside the cylindrical tube 11. The bottom of the telescopic rod 14 is rotatably connected to a grounding seat 16 through a pin. This causes the telescopic rod 14 to slide, thereby achieving adjustment. The limit head prevents the telescopic rod 14 from being pulled out excessively. The grounding seat 16 rotates to make full contact with the ground. The two cylindrical tubes 11 rotate around the rotating shaft 10 at a certain angle, thus making adaptive adjustments according to the height of the adjusted work platform 2, thereby facilitating workers to get on and off the work platform 2.

[0059] When the electromechanical equipment needs to be lifted, a second drive unit 17 is fixed to one end of the top of the lifting platform 3, a rotating rod 18 is fixed to the power output end of the second motor, and two support seats 19 are fixed to the top of the lifting platform 3. The rotating rod 18 and the two support seats 19 are rotatably connected. Two take-up and untake-down reels 20 are fixed to the outside of the rotating rod 18, and Y-shaped steel wire ropes are wound on the inner side of the take-up and untake-down reels 20. A lifting plate 22 is fixed to the bottom of the two Y-shaped steel wire ropes, thereby activating the second drive unit 17 to rotate in both directions. The power of the second drive unit 17... The output end drives the rotating rod 18 to rotate, and the rotating rod 18 drives the two take-up and release reels 20 to rotate. The forward and reverse rotation of the take-up and release reels 20 realizes the take-up and release of the Y-shaped steel wire rope, placing the electromechanical equipment on the lifting plate 22, realizing the lifting of the lifting plate 22, thereby lifting the electromechanical equipment. When the lifting plate 22 is raised to a suitable height, pull the door handle on the side near the lifting plate 22. The door handle drives the sliding door 24 to slide, which can open the sliding door 24, and then the electromechanical equipment can be pulled into the top of the work platform 2 for easy installation.

[0060] Reference Figures 1 to 5 The building installation equipment of the second aspect of this application can be used for the installation of electrical, water supply and drainage, HVAC, communication lines and pipes, etc. The building installation equipment includes the engineering ladder of the first aspect of this application. Through the structural design of the lifting mechanism, the device adjusts the working platform 2 to a suitable height by activating the first drive component 4, and adaptively adjusts the telescopic rod 14 according to the adjusted height of the working platform 2, facilitating workers to access the top of the working platform 2 for work, thus improving the flexibility of the electromechanical installation engineering ladder. Simultaneously, through the structural design of the installed lifting platform 3, the device uses the activation of the second drive component 17 to perform forward and reverse rotation to achieve the winding and unwinding of the wire rope, thereby realizing the lifting of the lifting plate 22, improving the practicality of the electromechanical installation engineering ladder.

[0061] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. An engineered ladder characterized by, The engineering ladder comprises: a base; a lifting mechanism arranged on the base; a working platform movably arranged on the base, the lifting mechanism being used to drive the working platform to lift; a mounting lifting platform arranged on the working platform and used to lift; a protective structure arranged at each circumferential side of the working platform.

2. The engineered ladder of claim 1, wherein: The lifting mechanism comprises a first driving member, a threaded screw rod and a threaded pipe, the first driving member being arranged on the base and connected with the threaded screw rod, the threaded screw rod being arranged in the threaded pipe, the threaded pipe being connected with the working platform, the first driving member driving the threaded pipe and the working platform to lift by driving the threaded screw rod to rotate.

3. The engineered ladder of claim 2, wherein: The lifting mechanism comprises a strength connecting rod, a guide column and a guide pipe, the guide column being arranged on the base, the guide pipe being sleeved on the guide column and connected with the working platform, the strength connecting rod being arranged between the guide pipes on the same side.

4. The engineered ladder of claim 1, wherein: The protective structure comprises oppositely arranged protective fences, each of the protective fences being slidably connected with a sliding door between two ends thereof.

5. The engineered ladder of claim 4, wherein: A support column is arranged at the top of each of the protective fences, the support column being used to support the mounting lifting platform, a reinforcing support rod being arranged between the mounting lifting platform and the support column.

6. The engineered ladder of claim 1, wherein: The mounting lifting platform comprises a second driving member, a rotating rod, a support seat, a winding wheel and a traction rope, the rotating rod being arranged on the support seat and connected with the second driving member, the winding wheel being arranged on the rotating rod and wound with the traction rope, the second driving member driving the winding wheel to wind or unwind the traction rope by driving the rotating rod to rotate.

7. The engineered ladder of claim 1, wherein: The engineering ladder further comprises a ladder climbing structure which is adjustable in length and is hinged at one end in the length direction to the working platform.

8. The engineered ladder of claim 7, wherein: The ladder climbing structure comprises connecting seats oppositely arranged on the working platform, a rotating shaft rotatably arranged between the connecting seats, barrel pipes arranged on the rotating shaft at intervals, and telescopic rods arranged on the barrel pipes, respectively, each of the telescopic rods comprising a plurality of telescopic portions, and the footstep rods being arranged between the opposite telescopic portions, respectively.

9. The engineered ladder of claim 8, wherein: Limiting members are arranged between the top of each of the telescopic rods and the barrel pipe, and grounding seats are arranged at the bottom of each of the telescopic rods. And / or self-locking universal wheels are arranged at the bottom of the base.

10. A building installation apparatus, characterized by The engineering ladder comprises: The engineering ladder according to any one of claims 1 to 9.

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