Floor slab hoisting clamp

Abstract

The utility model discloses a floor slab hoisting clamp, which belongs to the technical field of hoisting devices and comprises a main beam, an H-shaped frame, an adjusting screw rod and a clamping arm, the H-shaped frame is installed below the main beam and comprises a left sliding rod, a right sliding rod and a connecting rod, the two adjusting screw rods are rotationally connected with the two sliding rods through bearings, and the thread directions of the front and rear parts of the adjusting screw rods are opposite; one group of clamping arms is in sliding connection with the front half parts of the two sliding rods through the sliding blocks and is in threaded connection with the front half parts of the two screw rods, and the other group of clamping arms is in sliding connection with the rear half parts of the two sliding rods through the sliding blocks and is in threaded connection with the rear half parts of the two screw rods. The lifting appliance does not shake after being used for lifting a floor slab, and is high in lifting precision, high in safety and convenient to operate; the main beam slides relative to the H-shaped frame, locking rods are arranged at the two ends of each clamping arm, one end of each locking rod penetrates through the corresponding hollowed-out part, a lock chain is further arranged between the two clamping arms, and the anti-falling-off mechanism is formed.

Description

Technical Field

[0001] This utility model belongs to the field of hoisting device technology, specifically relating to a floor slab hoisting clamp. Background Technology

[0002] The floor slabs are precast concrete components produced and processed in the prefabrication yard and then transported directly to the construction site for installation.

[0003] The most common method for hoisting and transporting floor slabs is wire rope hoisting. For example, the invention patent application CN114988269A discloses a hoisting device and method for composite floor slabs. The device includes a hoisting box with a hollow bottom structure. A wire rope adjustment mechanism is fixedly installed inside the hollow structure to tighten the wire rope and adjust its length, thereby controlling the installation angle of the composite floor slab. Multiple clamping plates are used, with a back plate fixedly connected to the wire rope. A clamping mechanism is installed on the back plate and vertical plate to force the upper clamping plate in the clamping mechanism to move longitudinally and clamp the composite floor slab close to the bottom plate. An auxiliary fastening mechanism is slidably installed on the back plate and fixedly connected to the wire rope. The mechanical action of the wire rope restricts the movement of the clamping mechanism so that the composite floor slab is always in a clamped state.

[0004] However, steel wire is soft, and the floor slab is prone to swaying during hoisting. After being hoisted to the designated position, the construction workers have difficulty controlling the floor slab, resulting in problems such as low installation accuracy. The swaying floor slab is prone to hitting the construction workers, which is unsafe. Uneven binding of the floor slab at both ends can cause the floor slab to slip during hoisting and transportation, causing more serious safety problems. Utility Model Content

[0005] The purpose of this utility model is to provide a floor slab hoisting clamp to solve the problems of low installation accuracy and safety hazards in existing floor slab hoisting devices.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] This utility model relates to a floor slab hoisting clamp, which includes a main beam, an H-shaped frame, adjusting screws, and clamping arms. The H-shaped frame is installed below the main beam and includes two parallel sliding rods on the left and right sides and a connecting rod for connecting the two sliding rods. Two adjusting screws are provided, which are rotatably connected to the two sliding rods respectively through bearings, and the threads of the front and rear parts of the adjusting screws are opposite in direction. Two sets of clamping arms are provided. One set of clamping arms is slidably connected to the front half of the two sliding rods through a sliding block, and the sliding block of this set of clamping arms is threadedly connected to the front half of the two screws. The other set of clamping arms is slidably connected to the rear half of the two sliding rods through a sliding block, and the sliding block of this set of clamping arms is threadedly connected to the rear half of the two screws.

[0008] Preferably, the left and right ends of the H-shaped frame are provided with slide rails, and the two ends of the main beam extend into the slide rails and are slidably connected to the slide rails.

[0009] Preferably, the main beam has hollowed-out sections at both ends corresponding to the slide rails, and the clamping arms have locking rods at both ends. One end of the locking rod is rotatably connected to the corresponding clamping arm, and the other end extends through the hollowed-out section.

[0010] Preferably, the bottom of each sliding block is provided with a support component, which includes a connecting rod and a support body. One end of the connecting rod is welded to the bottom of the sliding block, and the support body is disposed at the other end of the corresponding connecting rod. The support body passes through the corresponding connecting rod and is threadedly connected to the connecting rod. The bottom end of the support body is provided with a rubber gasket.

[0011] Preferably, it further includes at least two sets of chains, one end of which is fixedly connected to one of the clamping arms, and the other end is detachably connected to the other clamping arm.

[0012] Preferably, each of the adjusting screws is provided with an adjusting handwheel at its end.

[0013] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0014] 1. The floor slab hoisting fixture involved in this utility model consists of a main beam, an H-shaped frame, and clamping arms. Compared with the traditional method of hoisting floor slabs with steel wire, the floor slab will not sway after hoisting, the hoisting accuracy is high, and the safety is strong. The tightness of the clamping arms can be adjusted by adjusting the screw, making operation convenient.

[0015] 2. The floor slab hoisting clamp of this utility model sets the main beam and H-shaped frame as a sliding connection, and provides hollow parts at both ends of the main beam corresponding to the slide rail positions. Locking rods are provided at both ends of the clamping arms. One end of the locking rod is rotatably connected to the corresponding clamping arm, and the other end extends through the hollow part. When the main beam is initially lifted, the H-shaped frame does not lift due to gravity, and the main beam and H-shaped frame slide relative to each other, causing the hollow part to move upwards until the locking rod is locked. Only then can the H-shaped frame be lifted after the main beam is lifted. The locking rod locked by the hollow part acts as a locking mechanism for the clamping arms, providing the first anti-falling mechanism for the floor slab hoisting clamp. Simultaneously, a chain is provided between the two sets of clamping arms to bind the hoisted floor slab, providing the second anti-falling mechanism for the floor slab hoisting clamp. These two anti-falling mechanisms can completely prevent the floor slab from falling off, further improving safety. Attached Figure Description

[0016] Figure 1 This is a diagram showing the usage state of the floor slab hoisting clamp involved in this utility model;

[0017] Figure 2This is a side view of the floor slab hoisting clamp involved in this utility model in its usage state.

[0018] Reference numerals: 1-Main beam, 11-Hollow section, 2-H-shaped frame, 21-Slide rod, 22-Connecting rod, 23-Slide rail, 3-Adjusting screw, 31-Adjusting handwheel, 4-Clamping arm, 5-Sliding block, 6-Support assembly, 61-Connecting rod, 62-Support body, 63-Rubber pad, 7-Locking rod, 8-Chain, 9-Floor slab. Detailed Implementation

[0019] To further understand the content of this utility model, the following embodiments are described in detail. The embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0020] See attached document Figure 1 and 2 As shown, the floor slab hoisting fixture involved in this utility model includes a main beam 1, an H-shaped frame 2, an adjusting screw 3, and a clamping arm 4.

[0021] The H-shaped frame 2 is installed below the main beam 1. The H-shaped frame 2 includes two parallel sliding rods 21 on the left and right sides and a connecting rod 22 for connecting the two sliding rods 21. Slide rails 23 are provided at both ends of the H-shaped frame 2, and a limiting plate is provided at the top of the slide rails 23. Both ends of the main beam 1 extend into the slide rails 23 and are slidably connected to the slide rails 23. A hook is provided in the center of the main beam 1, and hollowed-out portions 11 are provided at both ends corresponding to the positions of the slide rails 23.

[0022] Two adjusting screws 3 are provided, each rotatably connected to two sliding rods 21 via bearings. Each adjusting screw 3 has an adjusting handwheel 31 at one end, and the threads of the front and rear portions of the adjusting screws 3 are in opposite directions. Two sets of clamping arms 4 are provided. One set of clamping arms 4 is slidably connected to the front half of the two sliding rods 21 via sliding blocks 5, and the sliding blocks 5 of this set of clamping arms 4 are threadedly connected to the front half of the two screws. The other set of clamping arms 4 is slidably connected to the rear half of the two sliding rods 21 via sliding blocks 5, and the sliding blocks 5 of this set of clamping arms 4 are threadedly connected to the rear half of the two screws. Locking rods 7 are provided at both ends of each clamping arm 4. One end of the locking rod 7 is rotatably connected to the corresponding clamping arm 4, and the other end extends through the hollow portion 11. At least two sets of chains 8 are also provided between the two sets of clamping arms 4. One end of the chain 8 is fixedly connected to one of the clamping arms 4, and the other end is detachably connected to the other clamping arm 4. Each of the sliding blocks 5 is provided with a support component 6 at its bottom. The support component 6 includes a connecting rod 61 and a support body 62. One end of the connecting rod is welded to the bottom of the sliding block 5, and the support body 62 is located at the other end of the corresponding connecting rod. The support body 62 passes through the corresponding connecting rod and is threadedly connected to the connecting rod. A rubber gasket 63 is provided at the bottom end of the support body 62.

[0023] When using the aforementioned floor slab 9 hoisting clamp, first move the entire clamp above the floor slab 9 so that the two sets of clamping arms 4 are positioned on both sides of the floor slab 9. Rotate the adjusting handwheel 31 to rotate the adjusting screw 3. Since the threads of the front and rear parts of the adjusting screw 3 are in opposite directions, the sliding block 5 slides simultaneously to one side of the floor slab 9, thereby clamping the clamping arms 4 onto the side edges of the floor slab 9. Then, rotate the support body 62 to move it downwards until the rubber pad 63 contacts the upper surface of the floor slab 9, thus ensuring that the floor slab 9 does not shift vertically. Next, slowly lift the main beam 1. Because the H-shaped frame 2 does not lift due to gravity, the main beam 1 slides relative to the H-shaped frame 2, causing the position of the hollow part 11 to move upward until the upper edge of the locking rod 7 contacts the main beam 1 above the hollow part 11 and the lower edge contacts the main beam 1 below the hollow part 11. The locking rod 7 is then locked, ensuring that the clamping arm 4 will not loosen during the hoisting of the floor slab 9, providing the first anti-falling mechanism for the hoisting of the floor slab 9. At this point, continuing to lift the main beam 1 will lift the H-shaped frame 2. After slightly lifting the H-shaped frame 2 to lift the floor slab 9 off the ground, the hoisted floor slab 9 can be secured with chains 8 as needed, providing the second anti-falling mechanism for the floor slab 9 hoisting clamp. Continuing to lift the main beam 1 will then hoist the floor slab 9 to the designated position.

[0024] The present invention has been described in detail above with reference to the embodiments. However, the description is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made in accordance with the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A floor hoisting clamp characterised in that: It includes a main beam, an H-shaped frame, adjusting screws, and clamping arms. The H-shaped frame is installed below the main beam and includes two parallel sliding rods on the left and right sides and a connecting rod for connecting the two sliding rods. Two adjusting screws are provided, which are rotatably connected to the two sliding rods respectively through bearings, and the threads of the front and rear parts of the adjusting screws are in opposite directions. Two sets of clamping arms are provided. One set of clamping arms is slidably connected to the front half of the two sliding rods through sliding blocks, and the sliding blocks of this set of clamping arms are threadedly connected to the front half of the two screws. The other set of clamping arms is slidably connected to the rear half of the two sliding rods through sliding blocks, and the sliding blocks of this set of clamping arms are threadedly connected to the rear half of the two screws.

2. The floor hoisting clamp of claim 1, wherein: The H-shaped frame is provided with slide rails at both ends, and the two ends of the main beam extend into the slide rails and are slidably connected to the slide rails.

3. The floor hoisting clamp of claim 2, wherein: The main beam has hollowed-out sections at both ends corresponding to the slide rails. The clamping arms have locking rods at both ends. One end of the locking rod is rotatably connected to the corresponding clamping arm, and the other end extends through the hollowed-out section.

4. The floor hoisting clamp of claim 1, wherein: Each sliding block is provided with a support component at its bottom. The support component includes a connecting rod and a support body. One end of the connecting rod is welded to the bottom of the sliding block, and the support body is located at the other end of the corresponding connecting rod. The support body passes through the corresponding connecting rod and is threadedly connected to the connecting rod. A rubber gasket is provided at the bottom end of the support body.

5. The floor hoisting clamp of claim 1, wherein: It also includes at least two sets of chains, one end of which is fixedly connected to one of the clamping arms, and the other end is detachably connected to the other clamping arm.

6. The floor hoisting clamp of claim 1, wherein: Each of the adjusting screws is equipped with an adjusting handwheel at its end.

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