Lateral lifting tool for prestressed hollow core slabs

Abstract

This invention belongs to the field of prestressed hollow slab component hoisting technology, specifically relating to a lateral hoisting tool for prestressed hollow slabs, aiming to solve the problem of the lack of lateral hoisting tools for prestressed hollow slabs in the prior art. The lateral hoisting tool for prestressed hollow slabs provided in this application includes a support assembly and several lateral hoisting components. Each lateral hoisting component is movable along the length of the support assembly. Each lateral hoisting component includes a top hook, a lower hook, and a trunk hook. The top hook and lower hook are respectively used to engage with keyways on both sides of the prestressed hollow slab. An elastic element is attached to the lower hook to generate elastic force. The trunk hook is rotatably mounted on the top hook, its bearing concentric with the top hook, and rotates about the axis of the first support rod, away from the side of the prestressed hollow slab. In the working state, the trunk hook is passively rotated under external force until the bottom surface of the prestressed hollow slab is vertical. This application provides a reliable lateral hoisting tool for prestressed hollow slabs.

Description

Technical Field

[0001] The invention belongs to the technical field of hoisting prestressed hollow slab components, and in particular relates to a lateral hoisting tool for a prestressed hollow slab. Background Art

[0002] With the innovation of prestressed hollow slab production technology, prestressed hollow slab can be applied to the interior and exterior walls of the project, and the use conditions of prestressed hollow slab have changed. Under the existing technical conditions, the use state of prestressed hollow slab is that the plate holes are arranged horizontally, and the hoisting device hangs the two ends of the prestressed hollow slab and lifts it to the designed position. However, the prestressed hollow slab designed and produced today is used laterally, and the plate holes of the prestressed hollow slab are arranged horizontally and vertically superimposed. In this case, the prestressed hollow slab can still be hung and lifted at both ends, but because the prestressed hollow slab with changed use conditions must be fixed at both ends, the existing lifting tools cannot adapt to the change in the actual use of the changed prestressed hollow slab. The lateral lifting tool of the prestressed hollow slab is a new innovative design. This is the current situation of the background of the lateral lifting tool of the prestressed hollow slab. The lateral lifting tool of the prestressed hollow slab is currently being developed. Summary of the invention

[0003] In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that there is no lateral lifting tool for prestressed hollow slabs in the prior art, the present application provides a lateral lifting tool for prestressed hollow slabs, including a support assembly and a plurality of lateral lifting assemblies, wherein the support assembly is composed of a first support rod and a second support rod arranged in parallel and spaced apart, each of the lateral lifting assemblies is movably mounted on the support assembly, and the lateral lifting assembly can move along the length direction of the support assembly;

[0004] The lateral hanging assembly comprises a top hook, a lower hook, a trunk hook and a first elastic element, the top hook is movably inserted into the first support rod, one end of the lower hook is movably inserted into the second support rod, and the other end of the lower hook is movably inserted into the first support rod, the two ends of the first elastic element are respectively connected to the top hook and the lower hook, the first elastic element is attached to the lower hook to generate elastic force, the top hook and the lower hook are respectively used to engage with the key slots on both sides of the prestressed hollow plate, and the trunk hook is rotatably installed on the side of the top hook away from the prestressed hollow plate;

[0005] The trunk hook comprises a first structural part and a second structural part, the first structural part comprises a hook part and a connecting part, one end of the hook part is rotatably mounted on the top hook, the end of the hook part away from the prestressed hollow plate is used to connect with an external structure, the connecting part is arranged on a side away from the lower hook and connected to the middle part of the hook part, the length of the connecting part is greater than the thickness of the prestressed hollow plate, the end of the connecting part away from the hook part is hinged to the second structural part through a second elastic element, and the rotation angle of the second structural part is less than or equal to 90°;

[0006] In the working state, the first structural part can rotate relative to the top hook under the action of external force until the hook part is parallel to the stretching direction of the first elastic element, and the second structural part passively rotates along the outer edge of the prestressed hollow plate to be orthogonal to the connecting part.

[0007] In some preferred technical solutions, damping blocks are provided in the middle of the first support rod and the second support rod, and the damping blocks are used to provide friction between the first support rod / the second support rod and the prestressed hollow plate to fix the trunk hook after rotating relative to the prestressed hollow plate.

[0008] In some preferred technical solutions, the first support rod and the second support rod have the same structure, and both the first support rod and the second support rod are retractable structures.

[0009] In some preferred technical solutions, a roller is provided at one end of the second structural part away from the connecting part, and the roller is provided close to one side of the prestressed hollow slab.

[0010] In some preferred technical schemes, the top hook includes a first lifting part, a second lifting part, and a third lifting part. The first lifting part and the third lifting part are arranged along a first direction and are respectively connected to two ends of the second lifting part. The second lifting part is arranged along a second direction. The first direction is orthogonal to the second direction. The length of the first lifting part is less than the depth of the keyway. The length of the second lifting part is equal to the distance from the side of the keyway to the top surface of the prestressed hollow slab. A first positioning tube is installed at the bottom of the third lifting part. The first positioning tube is sleeved on the outside of the first support rod. The first positioning tube is fixed to the first support rod by fasteners.

[0011] In some preferred technical solutions, a top anti-slip bar is installed at one end of the first hoisting part away from the second hoisting part, and the top anti-slip bar is arranged orthogonally to the first hoisting part, and the top anti-slip bar is used to match the keyway of the prestressed hollow plate.

[0012] In some preferred technical schemes, the lower hook includes a fourth lifting part, a fifth lifting part and a sixth lifting part, the fourth lifting part and the sixth lifting part are arranged along the first direction and are respectively connected to the two ends of the fifth lifting part, the fifth lifting part is arranged along the second direction, the first direction is orthogonal to the second direction, the length of the fourth lifting part is less than the depth of the keyway, the length of the fifth lifting part is equal to the distance from the side of the keyway to the top surface of the prestressed hollow slab, and a second positioning tube is installed at the bottom of the sixth lifting part, the second positioning tube is sleeved on the outside of the second support rod, and the second positioning tube is fixed to the second support rod by fasteners.

[0013] In some preferred technical solutions, a lower anti-slip bar is installed at one end of the fourth hoisting part away from the fifth hoisting part, and the lower anti-slip bar is arranged orthogonally to the fourth hoisting part, and the lower anti-slip bar is used to match the keyway of the prestressed hollow plate.

[0014] In some preferred technical solutions, the hook portion is connected to the top hook via a bearing.

[0015] In some preferred technical solutions, the fastener is a top screw.

[0016] Beneficial effects of the present invention:

[0017] The lateral hoisting tool of the prestressed hollow slab of the present invention provides a reliable hoisting tool for the lateral use and installation of the prestressed hollow slab. The use of the prestressed hollow slab for the wall is a brand-new construction process. Without the support of the hoisting tool, the goal cannot be achieved. Therefore, the beginning of the lateral tool of the present application opens a new era of lateral hoisting of the prestressed hollow slab, providing scientific and strong support for the change of the use mode of the component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of a lateral lifting tool for a prestressed hollow slab according to an embodiment of the present invention;

[0020] Figure 2 A side view of a lateral lifting tool for a prestressed hollow slab according to an embodiment of the present invention;

[0021] Figure 3 A side view of a lateral lifting tool for a prestressed hollow slab in a horizontal state according to an embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the trunk hook in one embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of a top hook in an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the lower hook in one embodiment of the present invention;

[0025] Figure 7 It is a structural schematic diagram of a support assembly in one embodiment of the present invention;

[0026] Figure 8 This is an exploded schematic diagram of a first support rod in an embodiment of the present invention;

[0027] List of reference numerals:

[0028] 1-first support rod, 2-second support rod, 3-connecting shaft bolt, 4-trunk hook, 5-second elastic element, 6-hook, 7-top hook, 8-positioning tube, 9-positioning top screw, 10-lower hook, 11-upper stabilizing rubber block, 12-lower stabilizing rubber block, 13-first elastic element, 14-bearing, 15-joint, 16-pin, 17-roller, 18-anti-slip rod. DETAILED DESCRIPTION

[0029] In order to make the embodiments, technical solutions and advantages of the present invention more obvious, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are part of the embodiments of the present invention, rather than all the embodiments. It should be understood by those skilled in the art that these implementation modes are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0030] A lateral hoisting tool for a prestressed hollow slab of the present invention comprises a support assembly and a plurality of lateral hoisting assemblies, wherein the support assembly is composed of a first support rod and a second support rod arranged in parallel and at intervals, each of the lateral hoisting assemblies is movably mounted on the support assembly, and the lateral hoisting assembly can move along the length direction of the support assembly;

[0031] The lateral hanging assembly comprises a top hook, a lower hook, a trunk hook and a first elastic element, the top hook is movably inserted into the first support rod, one end of the lower hook is movably inserted into the second support rod, and the other end of the lower hook is movably inserted into the first support rod, the two ends of the first elastic element are respectively connected to the top hook and the lower hook, the first elastic element is attached to the lower hook to generate elastic force, the top hook and the lower hook are respectively used to engage with the key slots on both sides of the prestressed hollow plate, and the trunk hook is rotatably installed on the side of the top hook away from the prestressed hollow plate;

[0032] The trunk hook comprises a first structural part and a second structural part, the first structural part comprises a hook part and a connecting part, one end of the hook part is rotatably mounted on the top hook, the end of the hook part away from the prestressed hollow plate is used to connect with an external structure, the connecting part is arranged on a side away from the lower hook and connected to the middle part of the hook part, the length of the connecting part is greater than the thickness of the prestressed hollow plate, the end of the connecting part away from the hook part is hinged to the second structural part through a second elastic element, and the rotation angle of the second structural part is less than or equal to 90°;

[0033] In the working state, the first structural part can rotate relative to the top hook under the action of external force until the hook part is parallel to the stretching direction of the first elastic element, and the second structural part is passively rotated along the outer edge of the prestressed hollow slab to be orthogonal to the connecting part. At this time, the opening direction of the trunk hook matches the keyway in the lifting direction of the prestressed hollow slab.

[0034] In order to more clearly illustrate the lateral lifting tool of the prestressed hollow slab of the present invention, a preferred embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0035] As a preferred embodiment of the present invention, the lateral lifting tool of the prestressed hollow slab of the present invention is as follows Figure 1 As shown, it includes a support assembly and several lateral hanging assemblies. The support assembly is composed of a first support rod 1 and a second support rod 2 arranged in parallel and spaced apart. Each lateral hanging assembly is movably mounted on the support assembly, and the lateral hanging assembly can move along the length direction of the support assembly.

[0036] The lateral hoisting assembly includes a top hook, a lower hook, a trunk hook and a first elastic element. The top hook is movably installed on the first support rod, one end of the lower hook is movably installed on the second support rod, and the other end of the lower hook is movably installed on the first support rod. The two ends of the first elastic element are respectively connected to the top hook and the lower hook. The first elastic element is attached to the lower hook to generate elastic force. The trunk hook is rotatably installed on the top hook, and its bearing is concentric with the top hook. It rotates away from the side of the prestressed hollow plate around the axis of the first support rod. In the working state, the trunk hook is passively rotated under the action of external force until the bottom surface of the prestressed hollow plate is perpendicular to the horizontal plane. The trunk hook is rotatably installed on the side of the top hook away from the prestressed hollow plate.

[0037] In other preferred embodiments, the lateral lifting assembly includes a top hook, a lower hook and a trunk hook, the top hook and the lower hook are connected by a first elastic element, the top hook and the lower hook are respectively used to engage and match with the key slots on both sides of the prestressed hollow plate, and the trunk hook is rotatably mounted on the side of the top hook away from the prestressed hollow plate. Specifically, the trunk hook is rotatably mounted on the top hook and its bearing is concentric with the top hook, and rotates around the axis of the first support rod to the side away from the prestressed hollow plate. In the working state, the trunk hook passively rotates under the action of external force until the bottom surface of the prestressed hollow plate is vertical.

[0038] See also Figure 4 The trunk hook 4 includes a first structural part and a second structural part. The first structural part includes a hook part and a connecting part. One end of the hook part is rotatably installed in the middle of the top hook and is coaxially connected to the first support rod with the top hook. The end of the hook part away from the prestressed hollow slab is used to connect with the external structure. Specifically, the upper top hanging hole of the hook part away from the prestressed hollow slab is used for lifting. The connecting part extending flatly in the middle of the hook part is connected to the second connecting part, that is, the connecting part is arranged on the side away from the lower hook and connected to the middle of the hook part. The length of the connecting part is greater than the thickness of the prestressed hollow slab. The end of the connecting part away from the hook part is hinged to the second structural part through a second elastic element. The rotation angle of the second structural part is less than or equal to 90°. Preferably, the hook part is connected to the top hook by a bearing 14. Preferably, refer to the attached Figure 2 , the hook 6 is the first structural part.

[0039] In the working state, the first structural part can rotate relative to the top hook under the action of external force until the hook part is parallel to the stretching direction of the first elastic element, and the second structural part passively rotates along the outer edge of the prestressed hollow plate to be orthogonal to the connecting part.

[0040] Furthermore, a damping block is provided in the middle of the first support rod 1 and the second support rod 2, and the damping block is used to provide friction between the first support rod / the second support rod and the prestressed hollow plate so that the trunk hook 4 can be fixed after rotating relative to the prestressed hollow plate. The damping block is preferably a rubber block, see Figure 7 An upper stabilizing rubber block 11 is arranged on the first support rod 1 , and a lower stabilizing rubber block 12 is arranged on the second support rod 2 .

[0041] Furthermore, the first support rod 1 and the second support rod 2 have the same structure, and both the first support rod 1 and the second support rod 2 are retractable structures.

[0042] Further, see Figure 4 A roller 17 is arranged at one end of the second structural part away from the connecting part, and the roller 17 is arranged close to one side of the prestressed hollow slab.

[0043] See also Figure 5The top hook 7 includes a first lifting part, a second lifting part, and a third lifting part. The first lifting part and the third lifting part are arranged along the first direction and are respectively connected to the two ends of the second lifting part. The second lifting part is arranged along the second direction. The first direction is orthogonal to the second direction. The length of the first lifting part is less than the depth of the keyway. The length of the second lifting part is equal to the distance from the side of the keyway to the top surface of the prestressed hollow slab. A first positioning tube is installed at the bottom of the third lifting part. The first positioning tube is sleeved on the outside of the first support rod 1, and the first positioning tube is fixed to the first support rod 1 by a fastener.

[0044] A top anti-slip bar is installed at one end of the first hoisting part away from the second hoisting part. The top anti-slip bar is arranged orthogonally to the first hoisting part and is used to match the keyway of the prestressed hollow plate.

[0045] Likewise, see Figure 6 The lower hook 10 includes a fourth hoisting part, a fifth hoisting part and a sixth hoisting part. The fourth hoisting part and the sixth hoisting part are arranged along the first direction and are respectively connected to the two ends of the fifth hoisting part. The fifth hoisting part is arranged along the second direction. The first direction is orthogonal to the second direction. The length of the fourth hoisting part is less than the depth of the keyway. The length of the fifth hoisting part is equal to the distance from the side of the keyway to the top surface of the prestressed hollow slab. The bottom of the sixth hoisting part is equipped with a second positioning tube, which is sleeved on the outside of the second support rod and fixed to the second support rod by a fastener. The fastener is a top screw.

[0046] A lower anti-skid bar is installed at one end of the fourth hoisting part away from the fifth hoisting part. The lower anti-skid bar is arranged orthogonally to the fourth hoisting part and is used to match the keyway of the prestressed hollow plate.

[0047] The present invention provides a lateral lifting tool for a prestressed hollow slab according to a state in which the prestressed hollow slab is changed from being used horizontally to being used laterally. In the lateral lifting state, only the key grooves on both sides of the plate surface of the prestressed hollow slab are used as fulcrums to construct a lifting frame structure. Because the prestressed hollow slab is used laterally, at least one of the two ends of the vertically arranged plate holes is a mounting connection part, and it is impossible to lift a plate in a laterally balanced manner by hanging one end. Without processing the component, only the top surface (upper plane) and two side key grooves of the prestressed hollow slab in a natural state are used as fulcrums. The use state of the prestressed hollow slab is that the lower parts of both ends are fulcrums, that is, the normal plane use state of the prestressed hollow slab. Now the working condition structural connection points of the lateral use of the prestressed hollow slab are changed from the lower parts of both ends as fulcrums to the inner and outer ends as fulcrums, and the sides are the upper and lower fitting surfaces; the force of the prestressed hollow slab is changed from single-sided vertical force to internal and external horizontal force and vertical transmission force of self-weight, and according to the appearance characteristics of the prestressed hollow slab, the keyways on both sides of the prestressed hollow slab are non-vertical surfaces, and the cumulative height difference on both sides is 45mm considering the tool application point (bottom width: upper plane width). First, prepare two support rods set in parallel to connect the corresponding lateral lower hook, lateral top hook, lifting trunk hook ring, the second support rod is connected to the stabilizing rubber block in the middle, the second support rod is connected to the two lateral lower hooks, the first support rod is connected to the lateral lower hook and the lateral top hook, and the lifting trunk hook ring which are connected integrally, so that the outline of the lateral lifting tool is basically formed, and the role of the second support rod is analyzed. The first support rod connects all the main workpieces of the tool, which plays the role of transmitting the lifting force and the swivel component, and the second support rod is connected to the lateral lower hook to balance and stably undertake the transfer of the lifting swivel weight. The support rod can be lengthened or shortened according to the length of the component to meet the needs of actual construction; the upper lifting trunk hook ring is designed to better balance the verticality of the prestressed hollow slab and enhance the safety of construction, because the power of the lateral top hook alone is relatively weak and insufficient to meet the needs of safely lifting the component. After the component is lifted, the hanging point is the upper part of the prestressed hollow slab, and the component will be unbalanced and non-vertical after rotation, requiring the assistance of the trunk lifting ring for correction. A bearing is provided at the connection between the trunk lifting ring and the first support rod to reduce the force generated by the rotation of the component, which is converted into friction in the transmission process between the ring and the support rod, thereby reducing the wear on the support rod and reducing the resistance to rotation, thereby increasing the stability of the lifting process.

[0048] Specifically, the first support rod 1 of the workpiece is equipped with positioning tubes 8 from both ends according to the size of the prestressed hollow plate component, and a screw hole for positioning top screws is provided in the middle position of the position control block. According to the length of the hoisted prestressed hollow plate, the position control is determined on the second support rod, and the positioning top screws 9 are tightened. The positioning top screws and the position control block are set at a total of six locations, two at each end of the first support rod, and one at each end of the second support rod. The stability of the frame is ensured. After the position is determined, the first structural part 6 of the lateral lower hook 10, the first elastic element 13, and the lateral top hook 7 are assembled into two groups, and are respectively passed from both ends to the first support rod 1 and the second support rod 2 (only the lateral lower hook is passed), and the positioning tube 8 is installed to tighten the positioning top screw 9. The basic frame is assembled. In order to achieve the design purpose, the top of the hook 6 is equipped with a trunk hook 4 and the second elastic element 5 is connected with the connecting shaft bolt 3. The end of the trunk hook 4 is opened with a 45-degree bevel and a roller 17 is installed and connected with a pin 16. Preferably, the first elastic element of the present application is a movable hook spring.

[0049] In order to better achieve the stability of the tool during the lifting process, an upper stabilizing rubber block 11 and a lower stabilizing rubber block 12 are respectively installed in the middle part of the upper second support rod. The support rod is divided into three sections. The middle section has internal threads at both ends, and the outer sections on both sides are joints 15 with internal threads at one end and external threads at the other end. The purpose of this design is to adjust the length of the lifting frame according to the length of the component to facilitate smoother construction.

[0050] When the hoist is in the state of lifting and installing the hollow plate workpiece, the assembled lifting hoist is placed on the hollow plate, the lower anti-skid rod 18 of the lower hook 10 of the workpiece is buckled on one side of the keyway of the hollow plate, and the end anti-skid rod 18 of the upper workpiece side hook 7 is buckled on the other side of the keyway of the hollow plate. The four hanging points are hung firmly and reliably, and the hook 6 is connected with two lifting rope clamps for vertical slow lifting. As the traction force increases, the hollow plate begins to rotate, and the hook 6 begins to rotate around the first support rod 1, and at the same time drives the trunk hook 4 to rotate around the connecting shaft bolt 3, and the roller 17 at the other end of the trunk hook rotates around the pin 16 and rolls forward along the side of the hollow plate until it is parallel to the bottom of the plate in the rotating state.

[0051] A bearing 14 is arranged at the lower part of the trunk hook, and the first support rod 1 in the hanger passes through it. The design purpose is to facilitate the rotation of the component, reduce friction and reduce the wear caused by the force generated by the lifting on the support rod. The bearing 14 is embedded in the lower part of the hook 6 to open a center hole with the same diameter as the inner circle of the bearing and the first support rod 1. The depth of the groove at the concentric point within the diameter range of the outer circle of the bearing is the sum of the thickness of the bearing 14, the thickness of the retaining ring and the thickness of the outer side of the retaining ring groove to complete the bearing groove embedding process.

[0052] The lateral top hook 7 rotates around the first support rod 1 and is constrained by the upper movable hook spring 13. The anti-slip rod 18 is connected to the top of the lateral top hook 7 to complete the single-piece assembly.

[0053] The lateral lower hook 10 is controlled by the first support rod 1 as a movable control point, and the lower part is firmly controlled by the second support rod 2. The anti-slip rod 18 is connected to the top of the lateral lower hook 10 to complete the single-piece assembly. The hoisting requires the hook to be hung vertically for lifting, so a distribution beam (balance) lifting is required.

[0054] The technical solutions in the above embodiments of the present application have at least the following technical effects and advantages:

[0055] The lateral hoisting tool of the prestressed hollow slab of the present invention provides a reliable hoisting tool for the lateral use and installation of the prestressed hollow slab. The use of the prestressed hollow slab for the wall is a brand-new construction process. Without the support of the hoisting tool, the goal cannot be achieved. Therefore, the beginning of this tool opens a new era of lateral hoisting of the prestressed hollow slab, providing scientific and strong support for the change of the use mode of the component.

[0056] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0057] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0059] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A lateral lifting tool for prestressed hollow slabs, characterized in that: It comprises a support assembly and a plurality of lateral hanging assemblies, wherein the support assembly is composed of a first support rod and a second support rod arranged in parallel and at intervals, each of the lateral hanging assemblies is movably mounted on the support assembly, and the lateral hanging assemblies can move along the length direction of the support assembly; The lateral hanging assembly comprises a top hook, a lower hook, a trunk hook and a first elastic element, the top hook is movably inserted into the first support rod, one end of the lower hook is movably inserted into the second support rod, and the other end of the lower hook is movably inserted into the first support rod, the two ends of the first elastic element are respectively connected to the top hook and the lower hook, the first elastic element is attached to the lower hook to generate elastic force, the top hook and the lower hook are respectively used to engage with the key slots on both sides of the prestressed hollow plate, and the trunk hook is rotatably installed on the side of the top hook away from the prestressed hollow plate; The trunk hook comprises a first structural part and a second structural part, the first structural part comprises a hook part and a connecting part, one end of the hook part is rotatably mounted on the top hook, the end of the hook part away from the prestressed hollow plate is used to connect with an external structure, the connecting part is arranged on a side away from the lower hook and connected to the middle part of the hook part, the length of the connecting part is greater than the thickness of the prestressed hollow plate, the end of the connecting part away from the hook part is hinged to the second structural part through a second elastic element, and the rotation angle of the second structural part is less than or equal to 90°; In the working state, the first structural part can rotate relative to the top hook under the action of external force until the hook part is parallel to the stretching direction of the first elastic element, and the second structural part passively rotates along the outer edge of the prestressed hollow plate to be orthogonal to the connecting part.

2. The lateral lifting tool for prestressed hollow slab according to claim 1, characterized in that: A damping block is disposed in the middle of each of the first support rod and the second support rod, and the damping block is used to provide friction between the first support rod / the second support rod and the prestressed hollow slab.

3. The lateral lifting tool for prestressed hollow slab according to claim 2, characterized in that: The first support rod and the second support rod have the same structure, and both the first support rod and the second support rod are retractable structures.

4. The lateral lifting tool for prestressed hollow slab according to claim 1, characterized in that: A roller is arranged at one end of the second structural part away from the connecting part, and the roller is arranged close to one side of the prestressed hollow slab.

5. The lateral lifting tool for prestressed hollow slab according to claim 1, characterized in that: The top hook includes a first lifting part, a second lifting part, and a third lifting part. The first lifting part and the third lifting part are arranged along a first direction and are respectively connected to two ends of the second lifting part. The second lifting part is arranged along a second direction. The first direction is orthogonal to the second direction. The length of the first lifting part is less than the depth of the keyway. The length of the second lifting part is equal to the distance from the side of the keyway to the top surface of the prestressed hollow slab. A first positioning tube is installed at the bottom of the third lifting part. The first positioning tube is sleeved on the outside of the first support rod. The first positioning tube is fixed to the first support rod by a fastener.

6. The lateral lifting tool for prestressed hollow slab according to claim 5, characterized in that: A top anti-slip bar is installed at one end of the first hoisting part away from the second hoisting part. The top anti-slip bar is arranged orthogonally to the first hoisting part and is used to match the keyway of the prestressed hollow plate.

7. The lateral lifting tool for prestressed hollow slab according to claim 1, characterized in that: The lower hook includes a fourth hoisting part, a fifth hoisting part and a sixth hoisting part, the fourth hoisting part and the sixth hoisting part are arranged along a first direction and are respectively connected to two ends of the fifth hoisting part, the fifth hoisting part is arranged along a second direction, the first direction is orthogonal to the second direction, the length of the fourth hoisting part is less than the depth of the keyway, the length of the fifth hoisting part is equal to the distance from the side of the keyway to the top surface of the prestressed hollow slab, and a second positioning tube is installed at the bottom of the sixth hoisting part, the second positioning tube is sleeved on the outside of the second support rod, and the second positioning tube is fixed to the second support rod by a fastener.

8. The lateral lifting tool for prestressed hollow slab according to claim 7, characterized in that: A lower anti-slip bar is installed at one end of the fourth hoisting part away from the fifth hoisting part. The lower anti-slip bar is arranged orthogonally to the fourth hoisting part and is used to match the keyway of the prestressed hollow plate.

9. The lateral lifting tool for prestressed hollow slab according to claim 1, characterized in that: The hook portion is connected to the top hook via a bearing.

10. The lateral lifting tool for prestressed hollow slab according to claim 7, characterized in that: The fastener is a top screw.

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