Hoisting device for building construction

Abstract

The invention belongs to the technical field of hoisting equipment, particularly relates to a hoisting device for building construction, and provides the following scheme that the hoisting device comprises a main beam, one side of the main beam is slidably connected with an auxiliary beam, sliding rods are fixedly connected to the top and the bottom of the auxiliary beam, rod bodies of the two sliding rods are slidably connected with rotating shafts, and the middles of the two rotating shafts are rotatably connected with shaft seats; and the two shaft seats are fixedly connected to the main beam. The auxiliary beam structure capable of being adjusted in a sliding mode is matched with the sleeve to achieve flexible adjustment of the length of the hanging beam, the positioning frame and the rotating shaft are matched to achieve flexible adjustment of the angle of the hanging beam, the hanging beam is suitable for different construction space requirements, the threaded column and the adjusting nut are matched to fix the auxiliary beam, operation is convenient, stable and reliable, and the limiting angle iron effectively prevents deflection of the auxiliary beam; and the triangular hanging ring structure enhances the hoisting stability of wide building materials, the design of the adjustable position of the hoisting ring facilitates optimization of the gravity center distribution of the hoisting beam, and the construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting equipment, in particular to a hoisting device used in building construction. Background Art

[0002] In the construction industry, hoisting equipment is a critical tool for the efficient transportation and precise installation of building materials. Existing hoisting systems typically utilize fixed or single adjustable beam structures, making them difficult to adapt to the complex and ever-changing demands of construction sites.

[0003] After searching, a Chinese patent application with application publication number CN114572805A discloses a steel bar lifting device with high safety performance for construction. However, the existing technology still has shortcomings.

[0004] First, in construction environments with limited space, such as indoors or in densely populated work areas, these devices are prone to interfering with surrounding structures. Second, these devices utilize a rigid connection structure and lack angle adjustment, making them incapable of meeting the requirements for hoisting unusually shaped building materials (such as wide floor slabs and curved structures). To address these challenges, there is an urgent need to design a hoisting device for construction that achieves technological breakthroughs in adaptability to confined spaces and precise angle adjustment, thereby improving overall construction quality and safety. Summary of the Invention

[0005] Based on the technical problems that the existing technology has insufficient spatial adaptability and angle adjustment accuracy, the present invention proposes a hoisting device for construction.

[0006] The present invention proposes a hoisting device for construction, comprising a main beam, one side of the main beam being slidably connected to a secondary beam, the top and bottom of the secondary beam being fixedly connected to sliding rods, the rod bodies of the two sliding rods being slidably connected to rotating shafts, the middle parts of the two rotating shafts being rotatably connected to axle seats, the two axle seats being fixedly connected to the main beam, one end of the main beam close to the axle seat being fixedly connected to a limited position angle iron, one end of the secondary beam located inside the main beam being fixedly connected to a threaded column, the body of the threaded column being threadedly connected to an adjusting nut, and the adjusting nut being fixedly connected to the side close to the secondary beam There is a gasket, a through hole is opened in the middle of the main beam near the threaded column, and a sleeve adapted to the threaded column is fixedly connected inside the through hole, a notch groove is opened in the middle of the main beam near the axle seat, and a positioning frame is fixedly connected to the outer wall of the main beam near the notch groove. The top of the main beam is fixedly connected with no less than one seat tube, and the inside of the seat tube is opened with an internal thread, and the top of one of the seat tubes is threadedly connected with a hanging ring, both ends of the bottom of the main beam are fixedly connected with fixed hanging rings, and the bottom of the auxiliary beam away from the threaded column is fixedly connected with a dynamic hanging ring.

[0007] Preferably, one end of the sliding rod close to the threaded column is fixedly connected to a first limit block, and the other end of the sliding rod is fixedly connected to a second limit block, and both the first limit block and the second limit block are fixedly connected to the sub-beam.

[0008] Preferably, a sliding groove is provided on the side of the sub-beam close to the limiting angle iron, and a sliding block is fixedly connected to the side of the limiting angle iron close to the sliding groove, and the sliding block is slidably connected to the inside of the sliding groove.

[0009] Preferably, anti-slip grooves are provided on a side of the positioning frame away from the main beam.

[0010] Preferably, a mounting groove is provided on a side of the slide bar away from the auxiliary beam, and an electromagnet is fixedly connected inside the mounting groove.

[0011] Preferably, a socket is provided at one end of the rotating shaft close to the sub-beam, the sliding rod is slidably connected to the inside of the adjacent socket, the interior of the rotating shaft is configured as a cavity connected to the socket, the end of the cavity away from the socket is threadedly connected to a closing plug, the end of the closing plug located inside the cavity is fixedly connected to a piston cylinder, the interior of the piston cylinder is slidably connected to a piston column, the end of the piston column close to the socket is fixedly connected to a positioning plug, the positioning plug is made of iron material, and the same first return spring is fixedly connected between the positioning plug and the piston cylinder.

[0012] Preferably, a contact switch is embedded on a side of the first limit block close to the slide rod, and a trigger piece adapted to the contact switch is fixedly connected to an outer wall of the rotating shaft close to the contact switch.

[0013] Preferably, the inner walls on both sides of the main beam are provided with transverse grooves, and a lifting rod perpendicular to the travel direction of the auxiliary beam is inserted in the middle of the transverse groove. The end of the lifting rod located outside the main beam is threadedly connected to a limiting plate, and the end of the lifting rod located inside the transverse groove is fixedly connected to a positioning plate. The positioning plate is made of iron material, and a second return spring is fixedly connected to the side of the positioning plate close to the limiting plate.

[0014] Preferably, a pressure sensor is fixedly connected to the side of the sleeve away from the main beam, and the pressure detection element of the pressure sensor is flush with the side surface of the sleeve away from the main beam.

[0015] Preferably, a pad is fixedly connected to the middle of the limiting angle iron on the side away from the main beam, and the pad is made of rubber.

[0016] Compared with the prior art, the present invention provides a hoisting device for construction, which has the following beneficial effects: 1. This hoisting device for construction use, by setting up a sub-beam, a rotating shaft, a positioning frame, a sleeve, a threaded column and an adjusting nut, the slidably adjustable sub-beam structure cooperates with the sleeve to realize the flexible adjustment of the length of the hanging beam, and cooperates with the positioning frame and the rotating shaft to realize the flexible adjustment of the angle of the hanging beam, which is suitable for different construction space requirements. The threaded column and the adjusting nut are used to fix the sub-beam, which is easy to operate and stable and reliable. The limiting angle iron effectively prevents the deflection of the sub-beam and improves the safety of hoisting. The triangular hanging ring structure enhances the stability of hoisting wide-width building materials. The design of the adjustable position of the hanging ring facilitates the optimization of the center of gravity distribution of the hanging beam and improves construction efficiency.

[0017] 2. This hoisting device for construction is provided with a closing plug, a trigger piece, a contact switch, a piston cylinder, a piston column, a first return spring and a positioning plug. In the process of pulling out the sub-beam, when the threaded column completely exceeds the limit angle iron, the trigger piece triggers the contact switch, turning on the power circuit of the electromagnet. After the electromagnet is energized, it absorbs the positioning plug downward, so that the positioning plug enters the installation groove, and the positioning plug is fixedly connected to the rotating shaft. At this time, the sub-beam can only rotate together with the rotating shaft, and cooperates with the positioning frame to enhance the axial stability of the sub-beam in the deflected state. At the same time, it also strengthens the stability between the threaded column and the positioning frame. The linkage mechanism of the contact switch and the trigger piece accurately controls the timing of energizing the electromagnet. , the positioning function is automatically triggered after the sub-beam is deflected into place to avoid manual misoperation. During the process of the positioning plug being adsorbed, the piston column slides along the inner wall of the piston cylinder, and the first return spring is stretched. After the power of the manual control electromagnet is disconnected, the first return spring drives the positioning plug to reset upward. At this time, the fixed connection between the slide rod and the rotating shaft is lost. After the sub-beam rotates and resets, it can slide relative to the main beam again. The closing plug is connected to the rotating shaft by a threaded connection, and the closing plug can be unscrewed from the end of the rotating shaft by rotation. At this time, the piston cylinder, piston column, first return spring and positioning plug can be pulled out of the rotating shaft together, which is convenient for removing and replacing the first return spring with weakened elasticity and the worn positioning plug.

[0018] 3. A lifting device for construction construction, by providing a transverse groove, a positioning plate, a limit plate, a lifting rod and a second return spring, after the secondary beam is received into the main beam and the threaded column is fixed to the inside of the sleeve, it is necessary to screw the adjusting nut onto the threaded column. When the gasket presses the sleeve, the pressure sensor synchronously detects the pressure, and the electromagnet is controlled to be turned on to the power supply through an electrical signal. After the positioning plate is adsorbed, it enters the installation groove, and the secondary beam is positioned from the inside of the main beam, and the stability of the secondary beam in the storage state is enhanced by cooperating with the sleeve. The pressure trigger mechanism between the pressure sensor and the gasket is used to realize automatic control of the electromagnet adsorbing the positioning plate. When the positioning plate is adsorbed, the lifting rod slides downward, the second return spring is stretched under force, and the limit plate plays a limiting role in the formation of the lifting rod on the outside of the main beam. The limit plate is threadedly connected to the lifting rod and can be removed from the end of the lifting rod by rotation. At this time, the lifting rod, the second return spring and the positioning plate can be pulled out of the slot as a whole, which is convenient for replacing the second return spring with weakened elasticity and the worn positioning plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a hoisting device for construction proposed by the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of a rotating shaft of a hoisting device for construction proposed by the present invention; Figure 3 This is a schematic diagram of the main beam structure of a hoisting device for construction proposed by the present invention; Figure 4 This is a schematic diagram of the sub-beam structure of a hoisting device for construction proposed by the present invention; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 This is a front structural schematic diagram of a hoisting device for construction proposed by the present invention; Figure 7 for Figure 6 Enlarged view of point B in the middle; Figure 8 This is a structural schematic diagram of a lifting device for construction proposed by the present invention from another perspective.

[0020] In the figure: 1. Main beam; 2. Auxiliary beam; 3. Seat tube; 4. Lifting ring; 5. First limit block; 6. Second limit block; 7. Slide rod; 8. Axle seat; 9. Rotating shaft; 10. Closing plug; 11. Limiting angle iron; 12. Pad; 13. Slider; 14. Dynamic hanging ring; 15. Fixed hanging ring; 16. Adjusting nut; 17. Washer; 18. Horizontal groove; 19. Positioning plate; 20. Trigger plate; 21. Socket; 22. Piston cylinder; 23. Piston column; 24. First return spring; 25. Positioning plug; 26. Notch groove; 27. Positioning frame; 28. Limiting plate; 29. ​​Lifting rod; 30. Threaded column; 32. Slide groove; 33. Contact switch; 34. Mounting groove; 35. Electromagnet; 36. Sleeve; 37. Second return spring; 38. Anti-slip pattern. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-8 A lifting device for construction includes a main beam 1, one side of the main beam 1 is slidably connected to the secondary beam 2, the top and bottom of the secondary beam 2 are fixedly connected to sliding rods 7, the rod bodies of the two sliding rods 7 are slidably connected to the rotating shafts 9, the middle parts of the two rotating shafts 9 are rotatably connected to the shaft seats 8, the two shaft seats 8 are fixedly connected to the main beam 1, one end of the main beam 1 close to the shaft seat 8 is fixedly connected to the limited position angle iron 11, the end of the secondary beam 2 located inside the main beam 1 is fixedly connected to the threaded column 30, the column body of the threaded column 30 is threadedly connected to the adjusting nut 16, and the side of the adjusting nut 16 close to the secondary beam 2 is fixedly connected to the gasket 17. A through hole is provided in the middle of the main beam 1 near the end of the threaded column 30, and a sleeve 36 adapted to the threaded column 30 is fixedly connected inside the through hole. A notch groove 26 is provided in the middle of the main beam 1 near the end of the axle seat 8, and a positioning frame 27 is fixedly connected to the outer wall of the main beam 1 near the notch groove 26. The top of the main beam 1 is fixedly connected to at least one seat tube 3, and the interior of the seat tube 3 is provided with an internal thread. The top of one of the seat tubes 3 is threadedly connected to a hanging ring 4, and both ends of the bottom of the main beam 1 are fixedly connected to fixed hanging rings 15, and the bottom of the sub-beam 2 away from the threaded column 30 is fixedly connected to a dynamic hanging ring 14.

[0023] When in use, the main beam 1 and the auxiliary beam 2 together form a lifting beam for lifting building materials. When lifting, the lifting ring 4 is connected to the lifting device through a wire rope, and the fixed hanging ring 15 and the dynamic hanging ring 14 suspend the building materials through the wire rope. The auxiliary beam 2 can slide along the inside of the main beam 1 to adjust the overall length of the lifting beam. When the lifting space is limited, the adjusting nut 16 and the gasket 17 on the threaded column 30 can be unscrewed, and the auxiliary beam 2 can be stored in the inside of the main beam 1. One end of the threaded column 30 passes through the sleeve 36, and then the adjusting nut 16 is screwed on again. One end of the threaded column 30 is tightened until the gasket 17 presses the sleeve 36 away from the side of the main beam 1, fixing the sub-beam 2 inside the main beam 1 to realize the lifting of building materials in a small space. When the lifting space is sufficient and the building material is long, the adjusting nut 16 and gasket 17 on the threaded column 30 can be unscrewed, and then the sub-beam 2 can be slid outward from the main beam 1 to extend the overall length of the lifting beam to adapt to the fixation of long building materials. The limiting angle iron 11 plays a limiting role on the side of the main beam 1 for the sub-beam 2, effectively preventing the sub-beam 2 from angular deviation. The adjusting nut 16 and the washer 17 on the threaded column 30 are screwed off, and the auxiliary beam 2 is rotated. The sliding rod 7 drives the rotating shaft 9 to rotate, so that the column body of the threaded column 30 rotates through the notch 26 and the positioning bracket 27, and then the adjusting nut 16 is screwed onto one end of the threaded column 30 until the gasket 17 deposits the positioning bracket 27 away from the side of the main beam 1, thereby fixing the angle of the auxiliary beam 2. At this time, the two fixed hanging rings 15 and the dynamic hanging ring 14 form a triangular structure, which enhances the lifting stability of wide building materials. The adjustable auxiliary beam 2 structure realizes flexible adjustment of the lifting beam and is suitable for different construction space requirements. The threaded column 30 and the adjusting nut 16 are used to fix the auxiliary beam 2, which is convenient, stable and reliable. The lifting ring 4 can be installed in different seat tubes 3 by thread, which is convenient for optimizing the center of gravity distribution of the lifting beam and improving construction efficiency and safety.

[0024] In the present invention, one end of the sliding rod 7 close to the threaded column 30 is fixedly connected to the first limit block 5, and the other end of the sliding rod 7 is fixedly connected to the second limit block 6. The first limit block 5 and the second limit block 6 are both fixedly connected to the sub-beam 2, and the sliding rod 7 is fixed to the sub-beam 2 through the first limit block 5 and the second limit block 6.

[0025] In the present invention, a slide groove 32 is provided on the side of the subbeam 2 close to the limiting angle iron 11, and a slider 13 is fixedly connected to the side of the limiting angle iron 11 close to the slide groove 32. The slider 13 is slidably connected to the inside of the slide groove 32. When the subbeam 2 is slid laterally, the slider 13 slides along the inner wall of the slide groove 32 to limit the movement trajectory of the subbeam 2, reduce the risk of shaking of the subbeam 2, and enhance the stability of the sliding process. It is particularly suitable for working conditions where the position of the subbeam 2 is frequently adjusted in a narrow space, thereby reducing construction errors.

[0026] In the present invention, an anti-slip groove 38 is provided on the side of the positioning frame 27 away from the main beam 1. When the gasket 17 presses the side of the positioning frame 27, the side of the gasket 17 close to the positioning frame 27 contacts the anti-slip groove 38, thereby increasing the friction coefficient between the contact surface of the gasket 17 and the positioning frame 27, strengthening the fixing effect of the threaded column 30, and preventing the adjusting nut 16 from loosening and causing the sub-beam 2 to deflect accidentally.

[0027] In the present invention, a mounting groove 34 is formed on a side of the slide bar 7 away from the auxiliary beam, and an electromagnet 35 is fixedly connected inside the mounting groove 34 .

[0028] In the present invention, a socket 21 is provided at one end of the rotating shaft 9 close to the sub-beam 2, and the sliding rod 7 is slidably connected to the inside of the adjacent socket 21. The interior of the rotating shaft 9 is set as a cavity connected to the socket 21, and the end of the cavity away from the socket 21 is threadedly connected to a closing plug 10, and the end of the closing plug 10 located inside the cavity is fixedly connected to a piston cylinder 22, and the interior of the piston cylinder 22 is slidably connected to a piston column 23, and the end of the piston column 23 close to the socket 21 is fixedly connected to a positioning plug 25. The positioning plug 25 is made of iron material, and the same first return spring 24 is fixedly connected between the positioning plug 25 and the piston cylinder 22. The closing plug 10 is threadedly connected to the rotating shaft 9, and the closing plug 10 can be unscrewed from the end of the rotating shaft 9 by rotation. At this time, the piston cylinder 22, the piston column 23, the first return spring 24 and the positioning plug 25 can be pulled out from the rotating shaft 9 together, which is convenient for removing and replacing the first return spring 24 with weakened elasticity and the positioning plug 25 that is worn.

[0029] In the present invention, a contact switch 33 is embedded in the side of the first limit block 5 close to the slide rod 7, and a trigger piece 20 adapted to the contact switch 33 is fixedly connected to the outer wall of the rotating shaft 9 close to the contact switch 33. In the process of pulling out the sub-beam 2, when the threaded column 30 completely exceeds the limit angle iron 11, the trigger piece 20 triggers the contact switch 33, turning on the power circuit of the electromagnet 35. After the electromagnet 35 is energized, it absorbs the positioning plug 25 downward, so that the positioning plug 25 enters the installation groove 34, so that the positioning plug 25 is fixedly connected to the rotating shaft 9. At this time, the sub-beam 2 can only rotate together with the rotating shaft 9, and cooperates with the positioning frame 27 to enhance the deflection of the sub-beam 2 The axial stability in the state is also enhanced, and the stability between the threaded column 30 and the positioning frame 27 is also enhanced. The linkage mechanism of the contact switch 33 and the trigger piece 20 accurately controls the energizing time of the electromagnet 35, and automatically triggers the positioning function after the sub-beam is deflected into place to avoid manual misoperation. During the process of the positioning plug 25 being adsorbed, the piston column 23 slides along the inner wall of the piston cylinder 22, and the first return spring 24 is stretched by the force. After the electromagnet 35 is manually controlled to disconnect the power supply, the first return spring 24 drives the positioning plug 25 to reset upward. At this time, the fixed connection between the slide rod 7 and the rotating shaft 9 is lost, and the sub-beam 2 can slide relative to the main beam 1 again after rotation and reset.

[0030] In the present invention, transverse grooves 18 are provided on the inner walls on both sides of the main beam 1, and a lifting rod 29 perpendicular to the stroke direction of the secondary beam 2 is inserted in the middle of the transverse groove 18. The lifting rod 29 is located on the outside of the main beam 1. One end is threadedly connected to the limiting plate 28, and the end of the lifting rod 29 located inside the transverse groove 18 is fixedly connected to the positioning plate 19. The positioning plate 19 is made of iron material. The side of the positioning plate 19 close to the limiting plate 28 is fixedly connected to the second return spring 37. The limiting plate 28 is threadedly connected to the lifting rod 29. The limiting plate 28 can be removed from the end of the lifting rod 29 by rotation. At this time, the lifting rod 29, the second return spring 37 and the positioning plate 19 can be pulled out of the slot 18 as a whole, which is convenient for replacing the second return spring 37 with weakened elasticity and the worn positioning plate 19.

[0031] In the present invention, a pressure sensor is fixedly connected to the side of the sleeve 36 away from the main beam 1. The pressure detection element of the pressure sensor is flush with the side of the sleeve 36 away from the main beam 1. After the sub-beam 2 is received into the main beam 1 and the threaded column 30 is fixed to the inside of the sleeve 36, it is necessary to screw the adjusting nut 16 onto the threaded column 30. When the gasket 17 presses the sleeve 36, the pressure sensor synchronously detects the pressure, and the electromagnet 35 is controlled to be turned on by the electrical signal. After being adsorbed, the positioning plate 19 enters the installation groove 34, and the sub-beam 2 is positioned from the inside of the main beam 1. The sleeve 36 cooperates with the stability of the sub-beam 2 in the storage state. The pressure trigger mechanism between the pressure sensor and the gasket 17 is used to realize automatic control of the process of the electromagnet 35 adsorbing the positioning plate 19. When the positioning plate 19 is adsorbed, the lifting rod 29 slides downward, the second return spring 37 is stretched by force, and the limiting plate 28 on the outside of the main beam 1 limits the formation of the lifting rod 29.

[0032] In the present invention, a pad 12 is fixedly connected to the middle of the side of the limiting angle iron 11 away from the main beam 1. The pad 12 is made of rubber. When the threaded column 30 is fixed to the positioning frame 27, one side of the sub-beam 2 faces the side of the limiting angle iron 11. The gap between the sub-beam 2 and the limiting angle iron 11 is filled by the pad 12 made of rubber material, supporting the sub-beam 2 from the side while avoiding rigid impact on the sub-beam 2.

[0033] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A hoisting device for construction, comprising a main beam (1), characterized in that: One side of the main beam (1) is slidably connected to the auxiliary beam (2), the top and bottom of the auxiliary beam (2) are fixedly connected to a sliding rod (7), the rod bodies of the two sliding rods (7) are slidably connected to a rotating shaft (9), the middle parts of the two rotating shafts (9) are rotatably connected to an axle seat (8), the two axle seats (8) are fixedly connected to the main beam (1), one end of the main beam (1) close to the axle seat (8) is fixedly connected to a limited position angle iron (11), one end of the auxiliary beam (2) located inside the main beam (1) is fixedly connected to a threaded column (30), the column body of the threaded column (30) is threadedly connected to an adjusting nut (16), the side of the adjusting nut (16) close to the auxiliary beam (2) is fixedly connected to a gasket (17), the main beam (1) close to the screw A through hole is provided in the middle of one end of the threaded column (30), and a sleeve (36) adapted to the threaded column (30) is fixedly connected inside the through hole. A notch groove (26) is provided in the middle of one end of the main beam (1) close to the shaft seat (8), and a positioning frame (27) is fixedly connected to the outer wall of the main beam (1) close to the notch groove (26). The top of the main beam (1) is fixedly connected with a number of not less than one seat tube (3), and the inside of the seat tube (3) is provided with an internal thread, and the top of one of the seat tubes (3) is threadedly connected with a hanging ring (4). Both ends of the bottom of the main beam (1) are fixedly connected with a fixed hanging ring (15), and the bottom of the auxiliary beam (2) away from the threaded column (30) is fixedly connected with a dynamic hanging ring (14).

2. A hoisting device for construction according to claim 1, characterized in that: One end of the slide rod (7) close to the threaded column (30) is fixedly connected to a first limit block (5), and the other end of the slide rod (7) is fixedly connected to a second limit block (6). Both the first limit block (5) and the second limit block (6) are fixedly connected to the auxiliary beam (2).

3. A hoisting device for construction according to claim 1, characterized in that: A chute (32) is provided on one side of the auxiliary beam (2) close to the limiting angle iron (11), and a slider (13) is fixedly connected to one side of the limiting angle iron (11) close to the chute (32), and the slider (13) is slidably connected to the inside of the chute (32).

4. A hoisting device for construction according to claim 1, characterized in that: The side of the positioning frame (27) away from the main beam (1) is provided with an anti-slip groove (38).

5. A hoisting device for construction according to claim 2, characterized in that: A mounting groove (34) is provided on a side of the slide bar (7) away from the auxiliary beam, and an electromagnet (35) is fixedly connected inside the mounting groove (34).

6. A hoisting device for construction according to claim 5, characterized in that: The rotating shaft (9) is provided with a socket (21) at one end close to the auxiliary beam (2), and the slide rod (7) is slidably connected to the inside of the adjacent socket (21). The interior of the rotating shaft (9) is set as a cavity connected to the socket (21), and the end of the cavity away from the socket (21) is threadedly connected to a closing plug (10). The end of the closing plug (10) located inside the cavity is fixedly connected to a piston cylinder (22), and the interior of the piston cylinder (22) is slidably connected to a piston column (23). The end of the piston column (23) close to the socket (21) is fixedly connected to a positioning plug (25), and the positioning plug (25) is made of iron material. The same first return spring (24) is fixedly connected between the positioning plug (25) and the piston cylinder (22).

7. A hoisting device for construction according to claim 6, characterized in that: A contact switch (33) is embedded in the side of the first limit block (5) close to the slide rod (7), and a trigger piece (20) adapted to the contact switch (33) is fixedly connected to the outer wall of the rotating shaft (9) close to the contact switch (33).

8. A hoisting device for construction according to claim 5, characterized in that: The inner walls of both sides of the main beam (1) are provided with transverse grooves (18), and a lifting rod (29) perpendicular to the travel direction of the auxiliary beam (2) is inserted in the middle of the transverse groove (18). One end of the lifting rod (29) located outside the main beam (1) is threadedly connected to the limit plate (28), and one end of the lifting rod (29) located inside the transverse groove (18) is fixedly connected to a positioning plate (19), the positioning plate (19) is made of iron material, and a second return spring (37) is fixedly connected to the side of the positioning plate (19) close to the limit plate (28).

9. A hoisting device for construction according to claim 8, characterized in that: A pressure sensor is fixedly connected to the side of the sleeve (36) away from the main beam (1), and a pressure detection element of the pressure sensor is flush with the side surface of the sleeve (36) away from the main beam (1).

10. A hoisting device for construction according to claim 1, characterized in that: A pad (12) is fixedly connected to the middle portion of the limiting angle iron (11) on the side away from the main beam (1), and the pad (12) is made of rubber.

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