A hoisting device for rotating a composite floor

Abstract

The present application relates to hoisting equipment technical field, specifically to a kind of hoisting device for rotating composite floor, including two hoisting frames, two hoisting frames are connected by two reinforcing frames, the bottom of hoisting frame is equipped with two ropes, the bottom of rope is equipped with hoisting plate, composite floor is equipped between two hoisting plates, slot is opened in the surface of hoisting plate, the bottom surface of slot is inserted with clamping block, the inside of slot is inserted with plugboard, plugboard extrudes clamping block and clamps composite floor;Beneficial effect is that: slot is opened in the surface of hoisting plate, and clamping block and plugboard are arranged in slot, while rubber pad is fixed on the plate body of hoisting plate.When plugboard is inserted into slot, it will push clamping block and extrude rubber pad to deform, so as to tightly clamp composite floor.The friction and clamping force between hoisting plate and composite floor are increased, effectively avoiding the separation of hoisting plate and composite floor during hoisting, improving the safety and reliability of hoisting process.

Description

Technical Field

[0001] This invention relates to the field of hoisting equipment technology, specifically a hoisting device for rotating composite floor slabs. Background Technology

[0002] In the field of building construction, composite floor slabs are increasingly widely used. As a type of floor slab that combines precast and cast-in-place construction, composite floor slabs have advantages such as fast construction speed and good overall integrity. However, during the installation of composite floor slabs, operations such as lifting, rotating, and transferring are required to accurately place them in the designated position.

[0003] Currently, existing composite floor slab lifting devices have some shortcomings. On the one hand, some lifting devices have deficiencies in the stability of the connection between the lifting slab and the composite floor slab. During the lifting process, due to the large weight of the composite floor slab and the influence of various external forces, such as wind and the swaying of the lifting equipment, ordinary connection methods between the lifting slab and the composite floor slab may not provide sufficient friction and clamping force, easily leading to separation of the lifting slab and the composite floor slab, thus causing safety accidents and affecting construction progress and quality.

[0004] On the other hand, existing lifting devices also have problems with the firmness of component connections. For example, components such as insert plates and bolts used to reinforce the connection between the lifting plate and the composite floor slab may loosen during lifting due to vibration, uneven stress, or other reasons. Once these components loosen, the clamping effect of the lifting plate on the composite floor slab will be reduced, further increasing the safety hazards during the lifting process.

[0005] Furthermore, there is a lack of effective storage methods when lifting equipment is not in use. Lifting plates, ropes, and other components are left lying around, which not only takes up space on the construction site but also easily leads to loss or damage of components, increases construction costs, and is not conducive to standardized management of the construction site. Summary of the Invention

[0006] The purpose of this invention is to provide a lifting device for rotating composite floor slabs to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a lifting device for rotating composite floor slabs, comprising two lifting frames connected by two reinforcing frames, two ropes at the bottom end of the lifting frames, lifting plates at the bottom end of the ropes, a composite floor slab between the two lifting plates, slots on the surface of the lifting plates, clamping blocks inserted into the bottom surface of the slots, insert plates inserted into the inside of the slots, and the insert plates pushing the clamping blocks to clamp the composite floor slabs;

[0008] A connecting plate is fixed to one end of the insertion plate, and a screw rod is rotatably connected to the surface of the connecting plate. The screw rod is screwed onto the surface of the lifting plate.

[0009] Two crossbars are fixed at both ends of a reinforcement frame. Two connecting screws are screwed onto the surface of one crossbar. The lifting plate is fastened to the other crossbar and the connecting screws are screwed on to hold the lifting plate.

[0010] Preferably, the reinforcing frame has an "X" shaped plate structure, and both reinforcing frames have through holes on their surfaces. A connecting rod is inserted into each of the two through holes. The connecting rod is an "I" shaped round rod. The two reinforcing frames are located between two parallel plates of the connecting rod, and a lifting ring is fixed to the top of the connecting rod.

[0011] Preferably, another of the reinforcement frames is fixed with lifting rings two at each of the four corners of the ground. The ropes and lifting rings two correspond one-to-one. The top of the rope is tied to the lifting ring two, and the bottom of the rope is fixed with a hook. The lifting plate has an inverted "F" shaped plate structure. The surface of the lifting plate is fixed with reinforcement rib one and reinforcement rib two. The surface of reinforcement rib one has a lifting opening, and the hook is hooked into the lifting opening.

[0012] Preferably, rubber pads are fixed on both parallel plates of the hoisting plate. There are two slots, which are symmetrically distributed about the screw rod. The bottom surface of the slot has an insertion opening. The clamping block is inserted into the insertion opening. One end of the clamping block is fixed to the surface of the rubber pad. The other end of the insert plate has an inclined surface on the side facing the slot opening. The height of the clamping block is greater than the height of the insertion opening. After the insert plate pushes the clamping block to compress the rubber pad and deforms, it clamps the stacked floor slab. Both insert plates are fixed to the surface of the connecting plate.

[0013] Preferably, the surface of the connecting plate is provided with a reserved opening, which is an "I" shaped round opening. A rotating block is rotatably connected inside the reserved opening. The rotating block is an "I" shaped round block. A screw rod is fixed to one end of the rotating block, and a screw handle is fixed to the other end of the rotating block.

[0014] Preferably, the surface of the lifting plate is provided with a screw groove, the screw rod has two external threads at both ends, the screw groove has two internal threads at both ends, and after the screw rod is inserted into the screw groove, the internal threads and external threads are engaged and connected.

[0015] Preferably, the top and bottom surfaces of the insert plate are provided with slots, and the top and bottom surfaces of the slot are fixed with rubber clips. After the insert plate is inserted into the slot, the rubber clips are inserted into the slots.

[0016] Preferably, the surface of the connecting plate has two notches, which are symmetrically distributed about the screw rod. A rubber clamp is fixed inside the notch, and the thickness of the rubber clamp is greater than the depth of the notch. After the screw rod is screwed and locked on the surface of the lifting plate, the rubber clamp is clamped between the connecting plate and the lifting plate and undergoes elastic deformation.

[0017] Preferably, positioning grooves are formed on both sides of the hoisting plate, and elastic hanging plates are fixed on both sides of the connecting plate, the elastic hanging plates are in the shape of L-shaped plate structure, and the ends of the elastic hanging plates away from the connecting plate are in the shape of right-angled trapezoidal strips, after the connecting plate is abutted against the surface of the hoisting plate, one end of the elastic hanging plate is inserted into the positioning groove, and a pull ring is fixed on the surface of the elastic hanging plate.

[0018] Preferably, a connecting groove is formed on the bottom surface of the hoisting plate, after the hoisting plate is buckled on one horizontal rod, the connecting screw is screwed and inserted into the connecting groove.

[0019] Compared with the prior art, the hoisting device has the following beneficial effects:

[0020] The hoisting device for rotating the composite floor slab is characterized in that: a hoisting plate is provided, the surface of the hoisting plate is provided with an insertion groove, a clamping block and an insertion plate are arranged in the insertion groove, and a rubber pad is fixed on the plate body of the hoisting plate.

[0021] The hoisting device for rotating the composite floor slab is characterized in that: a hoisting plate is provided, the surface of the hoisting plate is provided with an insertion groove, a clamping block and an insertion plate are arranged in the insertion groove, and a rubber pad is fixed on the plate body of the hoisting plate.

[0022] The hoisting device for rotating the composite floor slab is characterized in that: a hoisting plate is provided, the surface of the hoisting plate is provided with an insertion groove, a clamping block and an insertion plate are arranged in the insertion groove, and a rubber pad is fixed on the plate body of the hoisting plate. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structure of the hoisting device for rotating the composite floor slab is shown in the drawings.

[0024] Figure 2 The structure of the hoisting device for rotating the composite floor slab is shown in the drawings. Figure 1 The structure of the hoisting device for rotating the composite floor slab is shown in the drawings.

[0025] Figure 3 For Figure 2 structure enlarged view at D;

[0026] Figure 4 For Figure 1 structure sectional view at B-B;

[0027] Figure 5 For Figure 4 structure enlarged view at E;

[0028] Figure 6 For Figure 1 structure sectional view at C-C;

[0029] Figure 7 For Figure 6 structure enlarged view at F;

[0030] Figure 8 For structure sectional view at G-G.

[0031] Figure 9 For

[0032] structure sectional view at G-G. Figure 10

[0033] For Figure 11 structure sectional view at G-G.

[0034] Figure 12 For structure sectional view at G-G.

[0035] Figure 13 Figure 12 structure sectional view at G-G.

[0036] In the figure: hoisting frame 1, reinforcing frame 101, perforation 102, connecting rod 103, lifting ring 104, crossbar 105, connecting screw 106, lifting ring 107, rope 2, hook 201, hoisting plate 3, insertion slot 301, insertion port 302, rubber pad 303, rubber clamping strip 304, screwing slot 305, positioning slot 306, connecting slot 307, insertion plate 4, clamping slot 401, clamping block 402, connecting plate 5, reserved port 501, rotating block 502, screwing rod 503, screwing handle 504, missing slot 505, rubber clamping block 506, elastic hanging plate 507, pull ring 508, reinforcing rib 6, hoisting port 601, reinforcing rib 7, composite floor slab 8. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figures 1 to 13 The present invention provides a technical solution: a lifting device for rotating composite floor slabs, comprising two lifting frames 1, which are connected by two reinforcing frames 101. The reinforcing frames 101 are in the form of an "X" shaped plate structure. Both reinforcing frames 101 have through holes 102 on their surfaces. A connecting rod 103 is inserted into the two through holes 102. The connecting rod 103 is in the form of an "I" shaped round rod. The two reinforcing frames 101 are located between two parallel plates of the connecting rod 103. A lifting ring 104 is fixed to the top of the connecting rod 103. The bottom of the hoisting frame 1 is provided with two ropes 2, and the bottom of the ropes 2 is provided with a hoisting plate 3. A stacked floor slab 8 is provided between the two hoisting plates 3. The other reinforcement frame 101 is fixed with lifting rings 107 at the four corners of the ground. The ropes 2 and the lifting rings 107 correspond one-to-one. The top of the rope 2 is tied to the lifting ring 107, and the bottom of the rope 2 is fixed with a hook 201. The hoisting plate 3 is an inverted "F" shaped plate structure. The surface of the hoisting plate 3 is fixed with a first reinforcement rib 6 and a second reinforcement rib 7. The surface of the first reinforcement rib 6 has a hoisting opening 601, and the hook 201 is hooked into the hoisting opening 601.

[0039] When it is necessary to hoist the composite floor slab 8, firstly, the four hoisting plates 3 are fastened around the perimeter of the composite floor slab 8. Then, the hooks 201 are hooked into the hoisting opening 601. After the hook of the hoisting equipment is hooked into the lifting ring 104, the hoisting equipment is started to lift the hoisting frame 1. The composite floor slab 8 can then be lifted by pulling the corresponding hoisting plates 3 through the four ropes 2, thus realizing the rotation and transfer of the composite floor slab 8 after hoisting.

[0040] To strengthen the stability of the hoisting slab 3 fastened to the composite floor slab 8, the following measures were proposed:

[0041] The surface of the hoisting plate 3 has a slot 301, and a clamping block 402 is inserted into the bottom surface of the slot 301. An insert plate 4 is inserted into the inside of the slot 301. The insert plate 4 pushes the clamping block 402 to clamp the composite floor slab 8. Rubber pads 303 are fixed on the two parallel plates of the hoisting plate 3. There are two slots 301, which are symmetrically distributed about the screw rod 503. The bottom surface of the slot 301 has an insertion opening 302. The clamping block 402 is inserted into the insertion opening 302. One end of the clamping block 402 is fixed to the surface of the rubber pad 303. The other end of the insert plate 4 has an inclined surface on the side facing the slot opening of the slot 301. The height of the clamping block 402 is greater than the height of the insertion opening 302. After the insert plate 4 pushes the clamping block 402 to compress the rubber pad 303 and deforms, it clamps the composite floor slab 8. Both insert plates 4 are fixed to the surface of the connecting plate 5. A connecting plate 5 is fixed to one end of the insert plate 4. A screw rod 503 is rotatably connected to the surface of the connecting plate 5, and the screw rod 503 is screwed onto the surface of the lifting plate 3. A reserved opening 501 is provided on the surface of the connecting plate 5. The reserved opening 501 is an "I"-shaped round opening. A rotating block 502 is rotatably connected inside the reserved opening 501. The rotating block 502 is an "I"-shaped round block. The screw rod 503 is fixed to one end of the rotating block 502, and a screw handle 504 is fixed to the other end of the rotating block 502. The surface of the lifting plate 3 is provided with a screw groove 305. The screw rod 503 has two external threads at both ends, and the screw groove 305 has two internal threads at both ends. After the screw rod 503 is inserted into the screw groove 305, the internal and external threads are engaged and connected. The top and bottom surfaces of the insert plate 4 are provided with slots 401. The top and bottom surfaces of the slots 301 are fixed with rubber clips 304. After the insert plate 4 is inserted into the slots 301, the rubber clips 304 are inserted into the slots 401.

[0042] After the lifting plate 3 is fastened onto the composite floor slab 8, the insert plate 4 is not yet inserted into the slot 301. The rubber pad 303 is clamped between the composite floor slab 8 and the lifting plate 3, increasing the friction between them. At this time, the inclined end of the clamping block 402 extends into the slot 301. After aligning the two insert plates 4 with their corresponding slots 301, the threaded rod 503 is inserted into the connecting groove 307. By squeezing the screw handle 504 and turning the rotating block 502, the threaded rod 503 is pushed into the slot 301. During this process, the insert plate 4 pushes the corresponding clamping block 402, squeezing the rubber pad 303 and clamping the composite floor slab 8, thereby reinforcing the connection between the lifting plate 3 and the composite floor slab 8 and preventing the lifting plate 3 from falling off during the lifting of the composite floor slab 8.

[0043] To prevent the insert plate 4 and the bolt rod 503 from becoming loose on the surface of the lifting plate 3, the following measures are proposed:

[0044] The surface of the connecting plate 5 is provided with two notches 505, which are symmetrically distributed about the threaded rod 503. The inside of the notch 505 is fixed with a rubber clamp block 506. The thickness of the rubber clamp block 506 is greater than the depth of the notch 505. After the threaded rod 503 is screwed and locked on the surface of the hoisting plate 3, the rubber clamp block 506 is clamped between the connecting plate 5 and the hoisting plate 3 to produce elastic deformation. The two sides of the hoisting plate 3 are provided with positioning grooves 306, and the two sides of the connecting plate 5 are fixed with elastic hanging plates 507. The elastic hanging plate 507 is in the shape of an "L" plate structure, and the end of the elastic hanging plate 507 away from the connecting plate 5 is in the shape of a right trapezoidal strip. After the connecting plate 5 is placed on the surface of the hoisting plate 3, one end of the elastic hanging plate 507 is inserted into the positioning groove 306, and the surface of the elastic hanging plate 507 is fixed with a pull ring 508.

[0045] When the threaded rod 503 is screwed and locked in the connecting groove 307, the rubber clamp block 506 is deformed between the connecting plate 5 and the hoisting plate 3. After the rubber clamp block 506 rebounds, it supports the connecting plate 5, so that the threaded rod 503 and the connecting groove 307 are firmly screwed. At this time, one end of the elastic hanging plate 507 is inserted into the positioning groove 306, and the connecting plate 5 is tightly placed on one side of the hoisting plate 3, thereby preventing the insertion plate 4 and the threaded rod 503 from loosening on the hoisting plate 3.

[0046] In order to realize the storage of the idle hoisting plate 3, the following is proposed:

[0047] Both ends of a reinforcing frame 101 are fixed with two cross bars 105. The surface of one cross bar 105 is screwed with two connecting screws 106. After the hoisting plate 3 is buckled on the other cross bar 105, the connecting screw 106 is screwed to clamp the hoisting plate 3. The bottom surface of the hoisting plate 3 is provided with a connecting groove 307. After the hoisting plate 3 is buckled on one cross bar 105, the connecting screw 106 is screwed and inserted into the connecting groove 307.

[0048] When the hoisting plate 3 is not in use, the hoisting plate 3 is buckled on one cross bar 105. The connecting groove 307 provided on the bottom plate of the hoisting plate 3 faces the connecting screw 106 installed on the surface of the other cross bar 105. The connecting screw 106 is screwed and inserted into the connecting groove 307, thereby limiting the hoisting plate 3 on the cross bar 105. The rope 2 is wound and stored, and the hoisting frame 1, the rope 2 and the hoisting plate 3 are stored in a matched manner.

[0049] Method for using the hoisting device for rotating the composite floor slab:

[0050] The four hoisting plates 3 are buckled around the composite floor 8, at this time the insert plate 4 is not inserted into the slot 301, the rubber pad 303 is clamped between the composite floor 8 and the plate body of the hoisting plate 3, the friction between the hoisting plate 3 and the composite floor 8 is increased, and one end of the clamping block 402 provided with an inclined surface extends into the slot 301. The hook 201 at the bottom end of the rope 2 is hooked on the hoisting plate 3 and is fastened in the hoisting hole 601 on the surface of the reinforcing rib 6 of the hoisting plate 3. The two insert plates 4 and the corresponding slots 301 are aligned, at this time the threaded rod 503 is inserted into the connecting groove 307. The rotating handle 504 is pinched by hand, the rotating block 502 is screwed, and the threaded rod 503 is pushed towards the slot 301. Since the threaded rod 503 is provided with two outer threads at both ends, the threaded groove 305 on the surface of the hoisting plate 3 is provided with two inner threads at both ends, and after the threaded rod 503 is inserted into the threaded groove 305, the inner threads and the outer threads are connected in cooperation. In the pushing process of the threaded rod 503, the insert plate 4 pushes the corresponding clamping block 402, so that the clamping block 402 clamps the composite floor 8 after the rubber pad 303 is pressed. At the same time, after the insert plate 4 is inserted into the slot 301, the rubber clamping strip 304 fixed on the top surface and the bottom surface of the slot 301 is inserted into the clamping groove 401 opened on the top surface and the bottom surface of the insert plate 4, so as to further fix the insert plate 4. When the threaded rod 503 is screwed and locked in the connecting groove 307, the rubber clamping block 506 (the thickness of the rubber clamping block 506 is greater than the depth of the missing groove 505) fixed in the missing groove 505 on the surface of the connecting plate 5 is elastically deformed between the connecting plate 5 and the hoisting plate 3, and after the rubber clamping block 506 rebounds, the connecting plate 5 is supported, so that the threaded rod 503 and the connecting groove 307 are firmly screwed. The elastic hanging plate 507 (in the shape of an "L" plate structure, and the end away from the connecting plate 5 is in the shape of a right trapezoidal strip) fixed on both sides of the connecting plate 5 is inserted into the positioning groove 306 opened on both sides of the hoisting plate 3 after the connecting plate 5 is abutted against the surface of the hoisting plate 3, and one end of the elastic hanging plate 507 is inserted into the positioning groove 306 opened on both sides of the hoisting plate 3, so as to tightly abut the connecting plate 5 against one side of the hoisting plate 3, thereby avoiding that the insert plate 4 and the threaded rod 503 are loose on the hoisting plate 3.

[0051] The hook body of the hoisting device is hooked on the lifting ring 104 at the top end of the connecting rod 103. The hoisting device is started to lift the hoisting frame 1, the composite floor 8 is hoisted by four ropes 2 to pull the corresponding hoisting plate 3, the rotation and transfer of the composite floor 8 after being hoisted are realized. When the hoisting plate 3 is not used, the hoisting plate 3 is buckled on the cross rod 105 at both ends of the reinforcing frame 101, so that the connecting groove 307 opened on the bottom surface of the hoisting plate 3 faces the connecting screw 106 installed on the surface of the other cross rod 105. The connecting screw 106 is screwed to be inserted into the connecting groove 307, so as to limit the hoisting plate 3 on the cross rod 105. The rope 2 is wound and stored, and the matching storage of the hoisting frame 1, the rope 2 and the hoisting plate 3 is completed.

[0052] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A hoisting device for rotating a cast-in-place floor, comprising two lifting frames (1) connected by two reinforcing frames (101), characterized in that: The bottom end of the hoisting frame (1) is provided with two ropes (2), the bottom end of the ropes (2) is provided with a hoisting plate (3), and a composite floor slab (8) is provided between the two hoisting plates (3). A slot (301) is opened on the surface of the hoisting plate (3), a clamping block (402) is inserted into the bottom surface of the slot (301), and an insert plate (4) is inserted into the inside of the slot (301). The insert plate (4) pushes the clamping block (402) to clamp the composite floor slab (8). A connecting plate (5) is fixed to one end of the insert plate (4), and a screw rod (503) is rotatably connected to the surface of the connecting plate (5). The screw rod (503) is screwed to the surface of the lifting plate (3). Two crossbars (105) are fixed at both ends of a reinforcing frame (101). Two connecting screws (106) are screwed onto the surface of one crossbar (105). The lifting plate (3) is fastened to the other crossbar (105) and the connecting screws (106) are screwed on to hold the lifting plate (3). Rubber pads (303) are fixed on both parallel plates of the lifting plate (3). There are two slots (301), which are symmetrically distributed about the screw rod (503). The bottom surface of the slot (301) is provided with a socket (302). The clamping block (402) is inserted into the socket (302). One end of the clamping block (402) is fixed to the surface of the rubber pad (303). The other end of the plate (4) has an inclined surface on the side facing the slot (301). The height of the clamping block (402) is greater than the height of the socket (302). The insert plate (4) pushes the clamping block (402) to squeeze the rubber pad (303) and deforms to clamp the stacked floor slab (8). Both insert plates (4) are fixed on the surface of the connecting plate (5). The surface of the connecting plate (5) is provided with a reserved opening (501). The reserved opening (501) is in the shape of an "I". The interior of the reserved opening (501) is rotatably connected to a rotating block (502). The rotating block (502) is in the shape of an "I". The screw rod (503) is fixed at one end of the rotating block (502). The other end of the rotating block (502) is fixed with a screw handle (504).

2. The hoisting device for rotating a composite floor slab according to claim 1, characterized in that: The reinforcing frame (101) has an "X" shaped plate structure. Both reinforcing frames (101) have through holes (102) on their surfaces. A connecting rod (103) is inserted into the two through holes (102). The connecting rod (103) is an "I" shaped round rod. The two reinforcing frames (101) are located between two parallel plates of the connecting rod (103). A lifting ring (104) is fixed to the top of the connecting rod (103).

3. The hoisting device for rotating a composite floor slab according to claim 1, characterized in that: Another reinforcement frame (101) has two lifting rings (107) fixed at the four corners of the ground. The rope (2) and the two lifting rings (107) correspond one to one. The top of the rope (2) is tied to the two lifting rings (107). The bottom of the rope (2) is fixed with a hook (201). The lifting plate (3) is an inverted "F" shaped plate structure. The surface of the lifting plate (3) is fixed with a first reinforcing rib (6) and a second reinforcing rib (7). The surface of the first reinforcing rib (6) is provided with a lifting opening (601). The hook (201) is hooked into the lifting opening (601).

4. The hoisting device for rotating a composite floor slab according to claim 1, characterized in that: The surface of the hoisting plate (3) is provided with screw grooves (305), the screw rod (503) is provided with two external threads at both ends, the screw grooves (305) are provided with two internal threads at both ends, and the internal threads and the external threads are connected after the screw rod (503) is inserted into the screw grooves (305).

5. The hoisting device for rotating a composite floor slab according to claim 1, characterized in that: The top surface and the bottom surface of the plug-in plate (4) are provided with clamping grooves (401), the top surface and the bottom surface of the plug-in groove (301) are fixed with rubber clamping strips (304), and the rubber clamping strips (304) are inserted into the clamping grooves (401) after the plug-in plate (4) is inserted into the plug-in groove (301).

6. The hoisting device for rotating a composite floor slab according to claim 1, characterized in that: The surface of the connecting plate (5) is provided with two missing grooves (505), the two missing grooves (505) are symmetrically distributed about the screw rod (503), the inside of the missing groove (505) is fixed with a rubber clamping block (506), the thickness of the rubber clamping block (506) is greater than the depth of the missing groove (505), and the rubber clamping block (506) is clamped between the connecting plate (5) and the hoisting plate (3) to produce elastic deformation after the screw rod (503) is screwed and locked on the surface of the hoisting plate (3).

7. The hoisting device for rotating a composite floor slab according to claim 1, characterized in that: The two sides of the hoisting plate (3) are provided with positioning grooves (306), and the two sides of the connecting plate (5) are fixed with elastic hanging plates (507), the elastic hanging plate (507) is in the form of an "L" plate structure, and the end of the elastic hanging plate (507) away from the connecting plate (5) is in the form of a right trapezoidal strip, one end of the elastic hanging plate (507) is inserted into the positioning groove (306) after the connecting plate (5) is abutted on the surface of the hoisting plate (3), and the surface of the elastic hanging plate (507) is fixed with a pull ring (508).

8. The hoisting device for rotating a composite floor slab according to claim 1, characterized in that: The bottom surface of the hoisting plate (3) is provided with a connecting groove (307), and the hoisting plate (3) is buckled on a horizontal rod (105), and the connecting screw rod (106) is inserted into the connecting groove (307) after being screwed.

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