A PC composite panel hoisting positioning structure and construction method

Abstract

The present invention relates to the technical field of composite plate hoisting, and specifically to a PC composite plate hoisting and positioning structure and a construction method, wherein a hoisting platform is connected to the lifting terminal of a crane body, and a center platform is elastically connected to the middle position of the bottom end of the hoisting platform, and the bottom end of the center platform is connected to a first hook through a first rotating connection device, and a second rotating connection device is provided at the side position of the bottom end of the hoisting platform, and the bottom end of the second rotating connection device is connected to a second hook, the first hook hooks the truss reinforcement hanging point of the composite plate, and the L-shaped inner end face of the second hook hooks the corner of the composite plate. After the crane body hoists the composite plate into place, the first hook is driven to automatically rotate and unhook through the first rotating connection device, and the second hook is driven to rotate and unhook through the second rotating connection device, and the arc-shaped outer end face of the rotating second hook abuts against the reinforcement on the side, so as to drive the composite plate to automatically fine-tune and move and position, thereby reducing the problem of manual correction and adjustment of position, and convenient operation.

Description

Technical Field

[0001] The present invention relates to the technical field of composite plate hoisting, and in particular to a PC composite plate hoisting positioning structure and a construction method. Background Art

[0002] PC composite panel is an assembled integral prefabricated panel and is superimposed with cast-in-place reinforced concrete to form an integral floor slab. During the construction process, the lifting of PC composite panel becomes a key issue. Existing lifting equipment and lifting construction technology mostly use cranes to lift the composite panels, supplemented by manual visual observation and adjustment at the target floor position. During each lifting process, manual adjustment and correction are required, which is relatively labor-intensive and time-consuming. In this regard, in the prior art, for example, Chinese patent document CN202120291354.1 discloses a PC composite panel rapid lifting and positioning device, which includes a positioning mechanism and a support mechanism. The positioning mechanism includes a positioning rod and a diagonal brace, and the support mechanism includes a T-shaped support body, a horizontal adjustment The PC composite board is lifted and dropped to a height of 200 to 300 mm from the floor template surface, and near the inner corner of the L-shaped positioning device; two workers stand on both sides of the unplaced device and lightly lean the PC composite board against the positioning rod, and then direct the PC composite board 1 to fall to the template surface. Although this reduces the problem of manual correction and adjustment of the position, after each lifting is qualified, the positioning device needs to be shortened to the shortest and then removed from the beam. After re-adjusting the size, it is placed in the position of the next PC composite board to be lifted for continued use. The disassembly and assembly process is too troublesome, which makes the lifting operation inconvenient. The practicality in actual use is insufficient and needs further research and development and improvement. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to propose a PC composite panel hoisting positioning structure and construction method to solve the problem of inconvenience in the construction of PC composite panel hoisting operations.

[0004] Based on the above objectives, the present invention provides a PC laminated plate hoisting and positioning structure, including a crane body, and further comprising:

[0005] A hoisting platform is connected to the hoisting terminal of the crane body, a central platform is elastically connected to the middle position of the bottom end of the hoisting platform, and a first hook is connected to the bottom end of the central platform through a first rotating connection device;

[0006] The second rotating connecting device is provided at the side of the bottom end of the lifting platform. The bottom end of the second rotating connecting device is connected to a second hook, and the outer end surface of the second hook is designed to be an open arc shape;

[0007] The first hook is used to hook the truss reinforcement hanging point of the composite plate, and the second hook is used to hook the edge and corner of the composite plate, and the distance between the bottom end of the outer arc of the second hook and the composite plate is greater than the distance between the side end of the outer arc of the second hook and the composite plate. After the crane body lifts the composite plate into place, the first rotating connection device drives the first hook to rotate and unhook, and the second rotating connection device drives the second hook to rotate and unhook, and the arc-shaped outer end face of the rotating second hook abuts against the reinforcement on the side, which is used to drive the composite plate to move and position.

[0008] Preferably, the inner end surface of the second hook is designed to be L-shaped to match the edge corner of the composite plate.

[0009] Preferably, the first rotating connection device includes a plurality of first driving wheels arranged along the bottom end of the central platform, a movable wheel is provided at the bottom end of the first driving wheel, the first driving wheel and the movable wheel are connected by a first transmission belt, and the first hook is fixedly connected to the bottom end of the movable wheel.

[0010] Preferably, the second rotating connection device includes a second driving wheel arranged at the side of the bottom end of the lifting platform, and the second driving wheel and the second hook are connected by a second transmission belt.

[0011] Preferably, a positioning rod is connected to the second hook on one side, and a support rod is connected to the middle fork of the positioning rod. In the initial state, the support rod and the positioning rod are forked in a herringbone shape. When the crane body hoists the composite plate into place, the positioning rod and the middle fork of the support rod abut against the pre-erected wooden strips to guide the positioning.

[0012] Wooden strips are used for guidance and positioning, eliminating the need for manual correction and adjustment of the position, until the positioning rod at one end of the same side touches the reinforcement of the beam and column next to it, and the composite plate falls vertically into place. When the second hook automatically unhooks, it is automatically and accurately centered.

[0013] Preferably, one end of the positioning rod is unidirectionally rotatably connected to the outer side of the second hook, and in an initial state, the positioning rod is tilted downward toward the inner side of the laminated plate.

[0014] Preferably, one end of the support rod is unidirectionally rotatably connected to the side end of the positioning rod, and an elastic member is connected between the support rod and the positioning rod. In the initial state, the elastic member drives the support rod to open.

[0015] Preferably, a sliding sleeve is sleeved on the positioning rod, and one end of the support rod is rotatably connected to the sliding sleeve.

[0016] Preferably, a fastening bolt is engaged with the sliding sleeve, and one end of the fastening bolt is screwed into and abuts against the positioning rod for locking.

[0017] The present invention also provides a method for hoisting and positioning a PC composite panel, comprising the following steps:

[0018] a: Move the lifting terminal of the crane body to the composite plate material on the ground, pull down the first hook so that the first hook hooks the composite plate truss reinforcement lifting point, and the L-shaped inner end face of the second hook hooks the corner of the composite plate;

[0019] b: Check the load of the hook and rope. After confirming that it is normal, the crane body will lift the composite plate to the top of the working floor;

[0020] c: When hoisted above the working floor, the wood strips are easily clamped by using the fork between the positioning rod and the support rod connected to the second hook, and the wood strips are used for guidance and positioning until the positioning rod at one end of the same side touches the reinforcement of the beam column next to it, and the composite plate falls vertically into place;

[0021] d: The first hook is driven to automatically rotate and unhook through the first rotating connection device, and the central platform moves up and resets. At the same time, the second hook is driven to rotate and unhook through the second rotating connection device. The arc-shaped outer end surface of the rotating second hook abuts against the reinforcement on the side, driving the composite plate to move to the center position.

[0022] The beneficial effects of the present invention are as follows: by providing a lifting platform connected to the lifting terminal of the crane body, the middle position of the bottom end of the lifting platform is elastically connected with the center platform, the bottom of the center platform is connected to the first hook by the first rotating connection device, and the side position of the bottom end of the lifting platform is provided with a second rotating connection device, and the bottom end of the second rotating connection device is connected to the second hook, the lifting terminal of the crane body is moved to the composite plate material on the ground, and the first hook is pulled down to make the first hook hook the truss reinforcement lifting point of the composite plate, and the L-shaped inner end face of the second hook hooks the edge corner of the composite plate BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the crane body of the present invention;

[0025] Figure 2It is a structural schematic diagram of the hoisting platform of the present invention when it is moved to the composite plate material on the ground;

[0026] Figure 3 This is a schematic diagram of the structure of the lifting platform of the present invention when it is lowered and ready for hook lifting;

[0027] Figure 4 This is a schematic diagram of the structure of the first hook and the second hook of the present invention when they are hooked;

[0028] Figure 5 It is a structural schematic diagram of the composite board of the present invention when it is hoisted to the working layer and placed in position;

[0029] Figure 6 This is a schematic structural diagram of the first rotating connection device and the second rotating connection device of the present invention when driving the rotation to unhook;

[0030] Figure 7 This is a structural diagram of the central platform of the present invention when it is moved up and reset;

[0031] Figure 8 is a schematic diagram of the three-dimensional structure of the second hook of the present invention;

[0032] Figure 9 This is a schematic side sectional structural diagram of the second hook of the present invention;

[0033] Figure 10 This is a structural diagram of the second hook of the present invention when it is positioned at the working layer;

[0034] Figure 11 This is a schematic structural diagram of the second hook of the present invention when it is rotated and positioned;

[0035] Figure 12 This is a schematic structural diagram of the second hook of the present invention when it is rotated and unhooked;

[0036] Figure 13 This is a schematic top view of the structure of the second hook of the present invention when the hook is overlapped with the plate;

[0037] Figure 14 It is a structural schematic diagram of the sliding sleeve of the present invention;

[0038] Figure 15 It is a structural schematic diagram of the elastic member of the present invention;

[0039] Figure 16 It is a structural schematic diagram of the limiting groove of the present invention;

[0040] in Figure 11 、 Figure 12 The direction of the solid arrow indicates the moving direction of the second transmission belt.

[0041] The following are marked in the figure:

[0042] 1. Crane body; 2. Hoisting platform; 3. Center platform; 4. First rotating connection device; 41. First driving wheel; 42. Movable wheel; 43. First transmission belt; 5. First hook; 6. Second rotating connection device; 61. Second driving wheel; 62. Second transmission belt; 7. Second hook; 8. Positioning rod; 9. Support rod; 10. Elastic part; 11. Sliding sleeve; 12. Limiting groove; 13. Fastening bolts; 14. Beam and column reinforcement; 15. Wooden strips. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0044] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0045] like Figure 1 、 Figure 2 The lifting mechanism of the present invention is a kind of lifting and positioning structure of PC composite plate, comprises a crane body 1, and in particular, also comprises a lifting platform 2 connected to the lifting terminal of the crane body 1, the middle position of the bottom end of the lifting platform 2 is elastically connected with a center platform 3, the bottom end of the center platform 3 is connected with a first hook 5 through a first rotating connection device 4, a second rotating connection device 6 is provided at the side position of the bottom end of the lifting platform 2, the bottom end of the second rotating connection device 6 is connected with a second hook 7, the outer end face of the second hook 7 is designed to be an open arc shape, the first hook 5 is used for lifting the truss reinforcement lifting point of the hook composite plate, the second hook 7 is used for lifting the corner of the hook composite plate, and the distance between the bottom end of the outer arc of the second hook 7 and the composite plate is greater than the distance between the side end of the outer arc of the second hook 7 and the composite plate. After the crane body 1 lifts the composite plate into position, the first hook 5 is driven to rotate and unhook by the first rotating connection device 4, and the second hook 7 is driven to rotate and unhook by the second rotating connection device 6. The arc-shaped outer end face of the rotating second hook 7 abuts the reinforcement on the side, which is used to drive the composite plate to move and position.

[0046] The present invention is based on the existing hoisting equipment and hoisting construction technology. Specifically, the composite board support is first erected, including cleaning the site, erecting the composite board support frame according to the drawing, erecting the square wood strips to the upper end of the support frame, adjusting the horizontal elevation of the square wood strips, and then lifting the composite board, including determining the position of the hook, hooking it at the truss reinforcement lifting point of the composite board, checking the stress of the hook and rope, maintaining the lifting level, lifting it to a position 1.5m above the working layer, manually correcting and adjusting the orientation of the composite board, and manually adjusting the position of the composite board at any time during the vertical downward hoisting process until it is in place to avoid overhanging on the composite board. The steel bars are rubbed against the pre-installed beam and column reinforcement 14 at the adjacent composite plate positions. Finally, a small wooden block is placed on the side end of the composite plate, and then the composite plate is pried with a crowbar to fine-tune the position so that the composite plate is centered and the hoisting is completed. The hoisting process consumes manpower and working hours, and is not efficient. At the same time, there are certain safety hazards when personnel are working at height and facing the movable composite plate. A positioning mechanism and a supporting mechanism are set, and the PC composite plate is positioned against the L-shaped positioning device to fall. Although the problem of manual correction and adjustment of the position is reduced, the repeated disassembly and assembly of the positioning device brings a greater workload, making the operation and construction inconvenient.

[0047] In view of this, the present invention provides a hoisting platform 2 connected to the lifting terminal of the crane body 1, and the middle position of the bottom end of the hoisting platform 2 is elastically connected to the center platform 3. Specifically, a spring telescopic rod is connected between the bottom end of the hoisting platform 2 and the top end of the center platform 3. The better spring telescopic rod is equipped with a damping function. The bottom end of the center platform 3 is connected to the first hook 5 through the first rotating connection device 4. A second rotating connection device 6 is provided at the side position of the bottom end of the hoisting platform 2. The bottom end of the second rotating connection device 6 is connected to the second hook 7, wherein the outer end face of the second hook 7 is designed to be an open arc shape, and the inner end face of the second hook 7 is designed to be L-shaped to match the edge corners of the composite plate, so that Figure 2 、 Figure 3 As shown, move the lifting terminal of the crane body 1 to the composite plate material on the ground, as shown in FIG. Figure 4 As shown, pull down the first hook 5 so that the first hook 5 hooks the truss reinforcement hanging point of the composite plate, and the L-shaped inner end face of the second hook 7 hooks the corner of the composite plate, check the force of the hook and rope, and after confirming that it is normal, as shown in the figure. Figure 5 As shown, the crane body 1 lifts the composite board to the top of the working layer, and then vertically drops the composite board to the position. Figure 6 As shown, the first hook 5 is driven by the first rotating connecting device 4 to automatically rotate and unhook, as shown in FIG. Figure 7 As shown, when the spring telescopic rod drives the central platform 3 to move up and reset, the first hook 5 is effectively unhooked, and at the same time, the second hook 7 is driven to rotate and unhooked through the second rotating connecting device 6, as shown in FIG. Figure 8 、 Figure 9As shown, since the distance between the bottom end of the outer arc of the second hook 7 and the composite plate is greater than the distance between the side end of the outer arc of the second hook 7 and the composite plate, that is, the length of L2 is greater than the length of L1, considering that the middle position of the adjacent composite plates on the working layer is generally pre-installed with beam and column reinforcement 14 for later pouring of composite plates, even if the composite plate is hoisted and placed between the beam and column reinforcement 14 on both sides, it may not be located in the center, thereby affecting the later pouring construction. Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 As shown, the arc-shaped outer end surface of the rotating second hook 7 abuts the reinforcement on the side, which is used to drive the composite plate to automatically fine-tune the movement and positioning, achieving the effect of automatic centering, reducing the problem of manual correction and adjustment of the position, and there is no need to repeatedly disassemble and assemble the positioning device, which is easy to operate.

[0048] In an embodiment of the present invention, the first rotating connection device 4 includes a plurality of first driving wheels 41 arranged along the bottom end of the central platform 3, and a movable wheel 42 is provided at the bottom end of the first driving wheel 41. The first driving wheel 41 and the movable wheel 42 are connected by a first transmission belt 43. The first hook 5 is fixedly connected to the bottom end of the movable wheel 42. Specifically, the first driving wheel 41 can be driven to rotate by a driving device such as a motor, a rotary cylinder, etc. The first transmission belt 43 can be wound around each first driving wheel 41 and the movable wheel 42 by a cable, or can be wound around each first driving wheel 41 and the movable wheel 42 by a chain or a rack. The first driving wheel 41 and the movable wheel 42 respectively adopt sprocket or gear meshing transmission. In particular, the driving device can be connected to the first driving wheel 41 at only one end. When the first driving wheel 41 at one end is driven to rotate, the movable wheels 42 are driven to rotate synchronously, so that the first hook 5 automatically unhooks and rebounds, reducing manual operation. When the hook is lifted, the first hook 5 is elastically pulled down to hang composite plates of different sizes.

[0049] In an embodiment of the present invention, the second rotating connection device 6 includes a second driving wheel 61 arranged at the side position of the bottom end of the lifting platform 2. The second driving wheel 61 and the second hook 7 are connected by a second transmission belt 62. Similarly, the second driving wheel 61 can be driven to rotate by a driving device such as a motor, a rotary cylinder, etc. The second transmission belt 62 can be fixedly connected to the left and right ends of the second hook 7 by a cable, and the second driving wheel 61 is driven to rotate by the driving device, thereby driving the second hook 7 to rotate and unhook.

[0050] In the embodiment of the present invention, a positioning rod 8 is connected to the second hook 7 on one side, and a support rod 9 is connected to the middle fork of the positioning rod 8. The positioning rod 8 and the support rod 9 are located on the outer side of the second driving wheel 61, thereby not affecting the initial stage of the hook composite plate. In the initial state, the support rod 9 and the positioning rod 8 are forked into a herringbone shape, so that when the crane body 1 is used to suspend the composite plate, the positioning rod 8 and the support rod 9 are forked to abut against the pre-erected wooden strips 15 for guidance and positioning. The wooden strips 15 are pre-erected to play a supporting role in the construction of the composite plate. The edge row of wooden strips 15 can be lowered. When hoisted above the working layer, the bifurcation between the positioning rod 8 and the support rod 9 connected to the second hook 7 is used to easily engage the wooden strip 15, and the wooden strip 15 is used for guiding and positioning, eliminating the need for manual correction and adjustment of the position, until the positioning rod 8 at one end of the same side reaches the beam and column reinforcement 14 on the side, and the composite board falls vertically into place, and then when the second hook 7 is automatically unhooked, it is automatically and accurately centered. Since the actual length of the wooden strip 15 is smaller than the composite board, that is, when the positioning rod 8 and the support rod 9 on the outer side of the second driving wheel 61 are in place, they move to the outside of the wooden strip 15, so that they are not interfered with by the wooden strip 15 when folding.

[0051] In an embodiment of the present invention, one end of the positioning rod 8 is unidirectionally connected to the outer side of the second hook 7. In the initial state, due to the gravity of the positioning rod 8 itself, the positioning rod 8 tilts downward toward the inner side of the composite plate.

[0052] In an embodiment of the present invention, one end of the support rod 9 is unidirectionally connected to the side end of the positioning rod 8, and an elastic member 10 is connected between the support rod 9 and the positioning rod 8. Specifically, the elastic member 10 can be a spring or a torsion spring. In the initial state, the elastic member 10 drives the support rod 9 to open and fork, and when the second hook 7 rotates and unhooks, since one end of the positioning rod 8 is unidirectionally connected to the outside of the second hook 7, and one end of the support rod 9 is unidirectionally connected to the side end of the positioning rod 8, the positioning rod 8 and the support rod 9 abut against the beam-column reinforcement 14 on the side during rotation and turn into an upright state, and move up with the lifting platform 2 along the gap between the composite plate and the beam-column reinforcement 14 and away from the working layer.

[0053] In an embodiment of the present invention, Figure 14 、 Figure 15 、 Figure 16 As shown, preferably, a sliding sleeve 11 is sleeved on the positioning rod 8, one end of the support rod 9 is rotatably connected to the sliding sleeve 11, and a limiting groove 12 is provided at the side end of the sliding sleeve 11 to allow the support rod 9 to rotate in one direction.

[0054] In an embodiment of the present invention, Figure 14 As shown, a fastening bolt 13 is engaged with the sliding sleeve 11, so that the sliding sleeve 11 can slide along the positioning rod 8 to adjust its position conveniently. After adjustment, one end of the fastening bolt 13 is screwed into the positioning rod 8 and locked to meet different positioning requirements.

[0055] The present invention discloses a method for hoisting and positioning a PC composite panel, comprising the following steps:

[0056] a: Move the lifting terminal of the crane body 1 to the composite plate material on the ground, pull down the first hook 5 so that the first hook 5 hooks the composite plate truss reinforcement lifting point, and the L-shaped inner end face of the second hook 7 hooks the corner of the composite plate;

[0057] b: Check the load on the hook and rope. After confirming that it is normal, the crane body 1 will lift the composite plate to the top of the working layer;

[0058] c: When hoisted above the working floor, the wooden strips 15 are easily clamped by the fork between the positioning rod 8 and the support rod 9 connected to the second hook 7, and the wooden strips 15 are used for guiding and positioning until the positioning rod 8 at one end of the same side touches the beam and column reinforcement 14 on the side, and the composite plate falls vertically into place;

[0059] d: The first rotating connection device 4 drives the first hook 5 to automatically rotate and unhook, and the central platform 3 moves up and resets. At the same time, the second rotating connection device 6 drives the second hook 7 to rotate and unhook. The arc-shaped outer end surface of the rotating second hook 7 abuts the reinforcement on the side, driving the composite plate to move to the center position.

[0060] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0061] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A PC composite board hoisting and positioning structure, comprising a crane body (1), characterized in that: Also includes: A hoisting platform (2) is connected to the hoisting terminal of the crane body (1); a central platform (3) is elastically connected to the middle position of the bottom end of the hoisting platform (2); and a first hook (5) is connected to the bottom end of the central platform (3) via a first rotating connection device (4); A second rotating connection device (6) is provided at a side position of the bottom end of the hoisting platform (2); a second hook (7) is connected to the bottom end of the second rotating connection device (6); and an outer end surface of the second hook (7) is designed to be an open arc shape; The first hook (5) is used to hook the truss reinforcement hanging point of the composite plate, and the second hook (7) is used to hook the corner of the composite plate, and the distance between the bottom end of the outer arc of the second hook (7) and the composite plate is greater than the distance between the side end of the outer arc of the second hook (7) and the composite plate. After the crane body (1) hangs the composite plate in place, the first rotating connection device (4) drives the first hook (5) to rotate and unhook, and the second rotating connection device (6) drives the second hook (7) to rotate and unhook. The arc-shaped outer end surface of the rotating second hook (7) abuts the reinforcement on the side, which is used to drive the composite plate to move and position.

2. A PC laminated board hoisting and positioning structure according to claim 1, characterized in that: The inner end surface of the second hook (7) is designed to be L-shaped to match the corner of the composite plate.

3. A PC laminated board hoisting and positioning structure according to claim 1, characterized in that: The first rotating connection device (4) includes a plurality of first driving wheels (41) arranged along the bottom end of the central platform (3), a movable wheel (42) is provided at the bottom end of the first driving wheel (41), the first driving wheel (41) and the movable wheel (42) are connected to each other through a first transmission belt (43), and the first hook (5) is fixedly connected to the bottom end of the movable wheel (42).

4. A PC laminated board hoisting and positioning structure according to claim 1, characterized in that: The second rotating connection device (6) comprises a second driving wheel (61) arranged at the side of the bottom end of the hoisting platform (2), and the second driving wheel (61) is connected to the second hook (7) through a second transmission belt (62).

5. The PC laminated board hoisting and positioning structure according to claim 1, characterized in that: A positioning rod (8) is connected to the second hook (7) on one side, and a support rod (9) is connected to the middle fork of the positioning rod (8). In the initial state, the support rod (9) and the positioning rod (8) are forked in a herringbone shape. When the crane body (1) is used to suspend the composite plate and place it in place, the positioning rod (8) and the support rod (9) are forked at the middle fork to abut against the pre-erected wooden strip (15) for guidance and positioning.

6. A PC laminated board hoisting and positioning structure according to claim 5, characterized in that: One end of the positioning rod (8) is unidirectionally connected to the outside of the second hook (7). In an initial state, the positioning rod (8) is tilted downward toward the inside of the composite plate.

7. The PC laminated board hoisting and positioning structure according to claim 5, characterized in that: One end of the support rod (9) is unidirectionally connected to the side end of the positioning rod (8), and an elastic member (10) is connected between the support rod (9) and the positioning rod (8). In the initial state, the elastic member (10) drives the support rod (9) to be opened.

8. The PC laminated board hoisting and positioning structure according to claim 7, characterized in that: A sliding sleeve (11) is sleeved on the positioning rod (8), and one end of the support rod (9) is rotatably connected to the sliding sleeve (11).

9. A PC laminated board hoisting and positioning structure according to claim 8, characterized in that: A fastening bolt (13) is engaged and connected to the sliding sleeve (11), and one end of the fastening bolt (13) is screwed into and abuts against the positioning rod (8) for locking.

10. A method for hoisting and positioning a PC composite panel, wherein the method adopts a PC composite panel hoisting and positioning structure according to any one of claims 5 to 9 for construction, wherein beam and column reinforcement (14) is pre-placed at the middle position of adjacent composite panels for later casting of composite panels, and wherein the method is characterized in that: The following steps are involved: a: Move the lifting terminal of the crane body (1) to the composite plate material on the ground, pull down the first hook (5), so that the first hook (5) hooks the truss reinforcement hanging point of the composite plate, and the L-shaped inner end face of the second hook (7) hooks the corner of the composite plate; b: Check the load on the hook and rope. After confirming that it is normal, the crane body (1) lifts the composite plate to the top of the working layer; c. When hoisted above the working floor, the wood strip (15) is easily engaged by using the fork between the positioning rod (8) and the support rod (9) connected to the second hook (7), and the wood strip (15) is used for guiding and positioning until the positioning rod (8) at one end of the same side contacts the beam and column reinforcement (14) on the side, and the composite plate falls vertically into place; d: The first hook (5) is driven to automatically rotate and unhook through the first rotating connection device (4), and the central platform (3) is moved up and reset. At the same time, the second hook (7) is driven to rotate and unhook through the second rotating connection device (6). The arc-shaped outer end face of the rotating second hook (7) abuts against the reinforcement on the side, driving the composite plate to move to the center position.

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