Lifting clamp for concrete floor

Abstract

The hoisting clamp for the concrete floor slab comprises a hoisting frame and a plurality of connectors connected to the lower portion of the hoisting frame, and the hoisting frame comprises two longitudinal hoisting beams and a plurality of transverse supporting beams connected between the two longitudinal hoisting beams; the connectors are connected to the longitudinal lifting beam in two rows and are linearly arranged respectively; the lifting frame is of a rectangular structure on the whole, and the length of the longitudinal lifting beams is larger than that of the transverse supporting beams. Lifting inhaul cables are arranged at the four points of the top of the lifting frame respectively, and the tops of the four lifting inhaul cables converge together, so that lifting of lifting equipment is facilitated. According to the hoisting clamp for the concrete floor slab, the hoisting frame serves as a middle force bearing structure, hoisting of the prefabricated floor slab is achieved, embedded parts of the floor slab are vertically and upwards hoisted in the hoisting process instead of being obliquely hoisted, and therefore the prefabricated floor slab is prevented from being damaged in the hoisting process.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a lifting clamp for concrete floor slabs. Background Art

[0002] Prior art CN108661225B discloses a prefabricated concrete composite floor slab with adjustable height, such as Figure 1 As shown, after prefabrication is complete, the floor slab needs to be lifted and removed. The typical lifting method involves using multiple ropes and clips attached to the steel trusses 3. This method has the disadvantage that the pulling force exerted by the ropes on the steel trusses 3 is not perpendicular to the floor slab, but rather tilted upward. This tilted pulling force can easily damage the concrete floor slab.

[0003] The applicant also developed a concrete floor slab with non-metallic support connectors embedded within the slab, leaving only the top exposed. This structure cannot be lifted using traditional lifting methods and tools, requiring the design of a new lifting fixture to ensure that the tilting lifting force during the lifting process does not damage the concrete slab. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a lifting clamp for a concrete floor slab, so as to solve the problem that the concrete floor slab may be damaged when an inclined pulling force is used for lifting the concrete floor slab.

[0005] In order to solve the above technical problems, the utility model provides a lifting clamp for concrete floor slabs, including a lifting frame and several connecting heads connected to the lower part of the lifting frame, wherein the lifting frame includes two longitudinal lifting beams and multiple transverse support beams connected between the two longitudinal lifting beams; the connecting heads are connected to the longitudinal lifting beams in two rows and are arranged linearly; the lifting frame as a whole has a rectangular structure, and the length of the longitudinal lifting beam is greater than the length of the transverse support beam; lifting cables are respectively provided at the four points on the top of the lifting frame, and the tops of the four lifting cables converge together to facilitate lifting by the lifting equipment.

[0006] The top of the connecting head is connected to the longitudinal lifting beam by a sliding connection.

[0007] A sliding groove is provided along the longitudinal direction of the longitudinal lifting beam, so that the connecting head can slide along the sliding groove.

[0008] The slide groove adopts a T-shaped groove or a dovetail groove structure.

[0009] The connecting head comprises an upper sliding head and a lower swinging head, wherein the upper sliding head is connected in the sliding groove; and the lower swinging head is rotatably connected to the upper sliding head.

[0010] The top of the upper sliding head is provided with a sliding block, the middle is a connecting rod, and the bottom is a connecting ring. The three are formed in one piece, wherein the connecting ring is annular and has no opening.

[0011] The width of the sliding block is greater than the diameter of the connecting rod, and the width is adapted to the width of the slide groove; the length of the sliding block is greater than the width of the sliding block, and the connecting rod is centrally connected to the sliding block, so that both ends of the sliding block in the length direction extend from both sides of the connecting rod to both ends.

[0012] The sliding block is provided with a locking structure to be fixed in the sliding groove.

[0013] The locking structure is a fastening bolt.

[0014] The lower swing head is C-shaped, with a first arc-shaped bend structure buckled with a connecting ring on the top, forming two forks from the middle downward, and a flat second bend structure connected to the hoisted structure at the bottom of each fork.

[0015] The lifting clamp for concrete floor slabs provided by the utility model realizes the lifting of prefabricated floor slabs by using a lifting frame as an intermediate load-bearing structure. During the lifting process, the embedded parts of the floor slabs are lifted vertically upwards instead of being lifted at an angle, thereby avoiding damage to the prefabricated floor slabs during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the prior art.

[0017] Figure 2 This is a schematic diagram of the exploded structure of the lifting fixture for concrete floor slabs according to an embodiment of the present utility model.

[0018] Figure 3 This is a schematic diagram of the side assembly structure of the lifting clamp for concrete floor slabs described in an embodiment of the utility model.

[0019] Figure 4 This is a schematic diagram of the front exploded structure of the lifting clamp for concrete floor slabs described in an embodiment of the utility model.

[0020] Figure 5 This is a schematic diagram of the front assembly structure of the lifting clamp for concrete floor slabs described in an embodiment of the utility model. DETAILED DESCRIPTION

[0021] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] like Figure 2-5As shown, the utility model provides a lifting clamp for concrete floor slabs, comprising a lifting frame 1 and a plurality of connectors 2 connected to the lower part of the lifting frame 1, wherein the lifting frame 1 comprises two longitudinal lifting beams 11 and a plurality of transverse support beams 12 connected between the two longitudinal lifting beams 11; the connectors 2 are connected to the longitudinal lifting beams 11 in two rows and are arranged linearly; the lifting frame 1 is a rectangular structure as a whole, and the length of the longitudinal lifting beams 11 is greater than the length of the transverse support beams 12 (the purpose is to adapt to the shape of the prefabricated floor slabs, which are usually in the shape of long strips); lifting cables 13 are respectively provided at the four points on the top of the lifting frame 1 (the lifting cables 13 are usually fixedly connected to the longitudinal lifting beams 11, and accordingly, a lifting ring structure needs to be welded to the top of the longitudinal lifting beams 11), and the tops of the four lifting cables 13 converge together to facilitate lifting by lifting equipment (such as a crane). When in use, the four lifting cables 13 are hung by the crane hook to lift the lifting frame 1 and move it to the top of the concrete floor to be lifted. Then the hook is controlled to descend so that the connecting head is close to the top of the concrete floor 3 and aligned with the embedded structure on the concrete floor 3. Then the connecting head 2 is connected to the embedded structure through manual operation. After the operator evacuates, the crane can be operated to lift the concrete floor and move it to the corresponding installation position. Then the connection between the connecting head and the embedded structure is manually released to complete the lifting and movement of a concrete floor.

[0025] The top of the connecting head 2 is connected to the longitudinal lifting beam 11 by a sliding connection, so that the position of the connecting head 2 on the longitudinal lifting beam 11 can be adjusted.

[0026] A sliding groove 14 is provided along the longitudinal direction of the longitudinal lifting beam 11 so that the connecting head 2 can slide along the sliding groove.

[0027] The slide groove 14 adopts a T-shaped groove or a dovetail groove structure.

[0028] The connecting head 2 includes an upper sliding head 21 and a lower swinging head 22 , wherein the upper sliding head 21 is connected to the sliding groove 14 ; the lower swinging head 22 is rotatably connected to the upper sliding head 21 .

[0029] The upper sliding head 21 has a sliding block 211 at the top, a connecting rod 212 in the middle, and a connecting ring 213 at the bottom. The three are formed in one piece, wherein the connecting ring 213 is annular and has no opening.

[0030] The width of the sliding block 211 is greater than the diameter of the connecting rod 212, and the width is adapted to the width of the slide groove 14; the length of the sliding block 211 is greater than the width of the sliding block 211, and the connecting rod 212 is centrally connected to the sliding block 211, so that both ends of the length direction of the sliding block 211 extend from both sides of the connecting rod 212 to both ends.

[0031] The sliding block 211 is provided with a locking structure to fix the sliding block 211 in the sliding groove.

[0032] The locking structure is a fastening bolt, and correspondingly, a vertical bolt hole needs to be processed on the sliding block 211.

[0033] The lower swing head 22 is C-shaped, with a first arc-shaped bend structure 221 buckled with a connecting ring on the top, forming two forks from the middle downwards, and a flat second bend structure 222 connected to the hoisted structure at the bottom of each fork.

[0034] The lifting clamp for concrete floor slabs provided by the utility model realizes the lifting of prefabricated floor slabs by using a lifting frame as an intermediate load-bearing structure. During the lifting process, the embedded parts of the floor slabs are lifted vertically upwards instead of being lifted at an angle, thereby avoiding damage to the prefabricated floor slabs during the lifting process.

[0035] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A lifting fixture for concrete floor slabs, characterized in that: The lifting frame comprises a lifting frame and a plurality of connectors connected to the lower portion of the lifting frame, wherein the lifting frame comprises two longitudinal lifting beams and a plurality of transverse support beams connected between the two longitudinal lifting beams; the connectors are connected to the longitudinal lifting beams in two rows and are arranged linearly; the lifting frame as a whole is a rectangular structure, and the length of the longitudinal lifting beams is greater than that of the transverse support beams; lifting cables are respectively provided at four points on the top of the lifting frame, and the tops of the four lifting cables converge together to facilitate lifting of the lifting equipment; The top of the connector is connected to the longitudinal lifting beam by means of a sliding connection; A sliding groove is provided along the longitudinal direction of the longitudinal lifting beam, so that the connecting head can slide along the sliding groove; The slide groove adopts a T-shaped groove or a dovetail groove structure; The connecting head comprises an upper sliding head and a lower swinging head, wherein the upper sliding head is connected in the sliding groove; and the lower swinging head is rotatably connected to the upper sliding head.

2. The lifting fixture according to claim 1, characterized in that: The top of the upper sliding head is provided with a sliding block, the middle is a connecting rod, and the bottom is a connecting ring. The three are formed in one piece, wherein the connecting ring is annular and has no opening.

3. The lifting fixture according to claim 2, characterized in that: The width of the sliding block is greater than the diameter of the connecting rod, and the width is adapted to the width of the slide groove; the length of the sliding block is greater than the width of the sliding block, and the connecting rod is centrally connected to the sliding block, so that both ends of the sliding block in the length direction extend from both sides of the connecting rod to both ends.

4. The lifting fixture according to claim 3, characterized in that: The sliding block is provided with a locking structure to be fixed in the sliding groove.

5. The lifting fixture according to claim 4, characterized in that: The locking structure is a fastening bolt.

6. The lifting fixture according to claim 1, characterized in that: The lower swing head is C-shaped, with a first arc-shaped bend structure buckled with a connecting ring on the top, forming two forks from the middle downward, and a flat second bend structure connected to the hoisted structure at the bottom of each fork.

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