Self-locking type concrete cover plate lifting appliance

Abstract

The utility model relates to a self-locking type concrete cover plate lifting appliance, and belongs to the technical field of building engineering lifting equipment. The device comprises a vertical rod, a transverse rod, a magnetic force adjusting mechanism and a fixing device, wherein the transverse rod is hinged to the vertical rod through a first rotating shaft, and the asymmetric end of the transverse rod is provided with a first magnetic block; the interior of the vertical rod is hollow, a rotatable second magnetic block is arranged in the vertical rod, the magnetic pole direction between the two magnetic blocks is adjusted through a top knob, and the transverse rod is controlled to be vertically inserted or horizontally locked; the fixing device comprises an inverted-cone-shaped clamping groove and an elastic fixing plug, the fixing plug is extruded by pressing a fixing rod downwards, and the rotating shaft is locked to prevent mistaken switching of magnetic poles. According to the device, the state conversion of the cross rod is realized through the switching of magnetic attraction and magnetic repulsion, the cross rod can be manually shifted below the cover plate for disassembly after hoisting, remote unlocking can also be realized by rotating the knob above the cover plate, and meanwhile, the elastic fixing plug forms shockproof friction locking, so that no accidental unhooking in the hoisting process is ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of engineering hoisting equipment, specifically a self-locking concrete cover plate hoist. Background Technology

[0002] Concrete cover slabs are prefabricated components widely used in municipal utility tunnels, road drainage systems, and other projects. The ease and adaptability of their hoisting operations directly affect construction efficiency and safety. Traditional hoisting methods mainly employ wire rope binding or pre-embedded lifting rings. The former is prone to damage to the edges and corners of the cover slab and has poor stability, while the latter requires precise pre-embedded positioning, resulting in a low tolerance for construction errors. In recent years, improved self-locking lifting devices have been developed to fix the cover slab by setting a rotatable crossbar at the bottom of the vertical rod. However, the extended state of these crossbars often relies on gravity self-locking or spring mechanical locking, which has significant drawbacks: after hoisting, the self-weight hook can only be unlocked in one way: either the operator needs to manually move the crossbar at the bottom of the cover slab to retract it, or a complex linkage mechanism is required to forcibly retract it from above the cover slab. Especially in confined environments such as narrow utility tunnels and densely packed structures, the inability to manually unlock from below the cover slab or the difficulty in reaching the top of the cover slab leads to difficulties in disassembling the lifting device. Therefore, how to achieve controllable switching of the crossbar state and compatibility with multi-directional disassembly while maintaining the simplicity and reliability of the lifting device structure has become an urgent technical problem to be solved. Utility Model Content

[0003] The purpose of this utility model is to provide a self-locking concrete cover plate lifting tool to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a self-locking concrete cover plate lifting device, comprising a vertical rod, a handle at the top of the vertical rod, a lifting ring at the top of the handle, a groove at the lower part of the vertical rod, and a horizontal rod at the groove, the horizontal rod being connected to the vertical rod via a first rotating shaft; the horizontal rod is asymmetrical, with different lengths at the two ends extending from the first rotating shaft, and a first magnetic block at the longer end of the horizontal rod; the vertical rod has a hollow internal structure, a second magnetic block inside the vertical rod, a second rotating shaft at the top of the second magnetic block, a knob at the top of the second rotating shaft, a slot inside the vertical rod, a fixing rod at the slot, one end of the fixing rod extending to the outside of the vertical rod, and a fixing plug fixed at the other end.

[0005] As a preferred embodiment of this utility model, a limiting device is provided on the first rotating shaft, so that the crossbar can only rotate within a 90° range in the horizontal and vertical directions.

[0006] In a preferred embodiment of this invention, the height of the second magnetic block is higher than that of the first rotation axis.

[0007] In a preferred embodiment of this invention, the second rotating axis extends upward to the top of the handle.

[0008] As a preferred embodiment of this utility model, the second rotating shaft is provided with a friction section with a rough surface.

[0009] In a preferred embodiment of this invention, the height of the slot is the same as that of the friction section.

[0010] As a preferred embodiment of this invention, the fixing plug is a flexible rubber structure.

[0011] As a preferred embodiment of this utility model, the thickness of the card slot increases from top to bottom.

[0012] The self-locking concrete cover plate lifting device proposed in this utility model has the following beneficial effects:

[0013] 1. This patent uses magnetic force to control the state of the crossbar, realizing bidirectional unlocking. By adjusting the magnetic pole direction of the second and first magnetic blocks with a knob, the opening and closing of the crossbar can be directly controlled above the cover plate. At the same time, since there is no rigid rotating mechanism between the crossbar and the vertical bar, the lifting device can also be disassembled by manually rotating the crossbar below the cover plate.

[0014] 2. This patent restricts the rotation of the second magnetic block by using a fixed rod and a fixed plug. When a crane or other lifting device temporarily places the cover plate in a relatively unstable or unbalanced position during the lifting process, even if the lifting device releases force and the cover plate is not pressed tightly against the crossbar, the second magnetic block will still be in a repulsive state with the first magnetic block. This prevents the lifting device from deflecting and shaking under non-pressurized conditions, which could cause the crossbar to rotate and cause an accidental unhooking.

[0015] 3. The transmission device of this patent is simple. In construction processes such as the hoisting of concrete cover plates, which are easily subjected to pressure, small deformations will not affect the operation of the lifting equipment too much, thus increasing the service life of the lifting equipment. Attached Figure Description

[0016] Figure 1 This is a front view of the present invention;

[0017] Figure 2 This is a front perspective view of the present invention in its unfolded state;

[0018] Figure 3 This is a front perspective view of the present invention in its retracted state;

[0019] Among them: 01, vertical rod, 02, handle, 03, groove, 04, horizontal rod, 05, first rotating shaft, 06, first magnetic block, 07, second magnetic block, 08, second rotating shaft, 09, knob, 10, friction section, 11, slot, 12, fixing rod, 13, fixing plug, 14, lifting ring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-3 One specific embodiment of this utility model is as follows:

[0022] A self-locking concrete cover lifting device includes a vertical rod 01, a handle 02 at the top of the vertical rod 01, and a lifting ring 14 at the top of the handle 02. A groove 03 is provided at the lower part of the vertical rod 01, and a horizontal rod 04 is provided at the groove 03. The horizontal rod 04 is connected to the vertical rod 01 via a first rotating shaft 05. A limiting device is provided on the first rotating shaft 05, allowing the horizontal rod 04 to rotate 90° around the first rotating shaft 05. When the horizontal rod 04 is in a vertical position, the vertical rod 01 can be easily inserted into a through hole in the concrete cover. When the horizontal rod 04 is rotated to a horizontal position and the vertical rod 01 is pulled upwards, the horizontal rod 04 will lock into the bottom of the concrete cover, providing a fixing function.

[0023] The crossbar 04 is asymmetrical, with different lengths at its two ends extending from the first rotation axis 05. A first magnetic block 06 is located at the longer end of the crossbar 04. The vertical bar 01 has a hollow internal structure, and a second magnetic block 07 is located inside the vertical bar 01. The height of the second magnetic block 07 is higher than that of the first rotation axis 05. A second rotation axis 08 is located at the top of the second magnetic block 07, extending upward to the top of the handle 08. A knob 09 is located at the top of the second rotation axis 08. By rotating the knob 09, the second magnetic block 07 can be rotated, thereby adjusting the orientation of the magnetic poles of the second magnetic block 07 relative to the first magnetic block 06.

[0024] The second rotating shaft 08 has a rough-surfaced friction section 10. A vertical rod 01 at the same height as the friction section 10 has a groove 11 inside. The thickness of the groove 11 increases from top to bottom, making the internal space of the vertical rod 01 within this section an inverted frustum shape. A fixing rod 12 is located at the groove 11, with one end extending to the outside of the vertical rod 01 and the other end fixed with a fixing plug 13. The fixing rod 13 can drive the fixing plug 13 to move up and down within the groove 11. The fixing plug 13 is an elastic rubber structure. When the fixing plug 13 is at the bottom of the groove 11, the groove 11 presses the fixing plug 13 to fix the second rotating shaft 08. When the fixing plug 13 is controlled to the upper position of the groove 11, the second rotating shaft 08 can rotate freely.

[0025] In this embodiment, firstly, rotating knob 09 causes the second magnetic block 07 and the first magnetic block 06 to attract each other magnetically. Since the second magnetic block 07 is higher than the first magnetic block 06, the crossbar 04 is magnetically fixed to a vertical position. The vertical rod 01 is inserted into the through hole on the concrete cover plate for lifting. Rotating knob 09 causes the second magnetic block 07 to rotate 180°. At this point, the second magnetic block 07 and the first magnetic block 06 repel each other magnetically, and the crossbar 04 rotates to a horizontal position due to its own weight and magnetic force. This moves the fixing rod 13 to the bottom position of the slot 11, restricting the rotation of the second rotating shaft 08. The concrete cover plate can then be lifted using the manual lifting handle 02 or by installing the hook on the lifting ring 14. After the concrete cover plate is lifted, the lifting device can be removed by moving the crossbar 04 from below the cover plate to a vertical position. Alternatively, the fixing rod 13 can be moved to the upper part of the slot 11 above the cover plate, and the knob 09 can be rotated to make the second magnetic block 07 and the first magnetic block 06 magnetically attract each other, so that the crossbar 04 can be rotated to a vertical position and the lifting device can be removed to complete the lifting.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-locking concrete slab hoist, characterized by, The utility model provides a kind of vertical pole (01), the top of vertical pole (01) is equipped with handle (02), the top of handle (02) is equipped with lifting ring (14), the lower part of vertical pole (01) is equipped with recess (03), recess (03) is equipped with crossbar (04), crossbar (04) is connected with vertical pole (01) by first rotating shaft (05);Crossbar (04) is asymmetric, the length of two ends extending from first rotating shaft (05) to two sides is different, and the longer end of crossbar (04) is equipped with first magnetic block (06);Vertical pole (01) is hollow structure, and vertical pole (01) is equipped with second magnetic block (07), the top of second magnetic block (07) is equipped with second rotating shaft (08), the top of second rotating shaft (08) is equipped with knob (09), vertical pole (01) is equipped with clamping groove (11), clamping groove (11) is equipped with fixed rod (12), and one end of fixed rod (12) extends to the outside of vertical pole (01), and the other end is fixed with fixed plug (13).

2. The self-locking concrete slab hoist of claim 1, wherein, The first rotating shaft (05) is equipped with limiting device, so that crossbar (04) can only rotate in 90 ° range of horizontal and vertical.

3. The self-locking concrete slab hoist of claim 1, wherein, The height of the second magnetic block (07) is higher than the first rotating shaft (05).

4. The self-locking concrete slab hoist of claim 1, wherein, The second rotating shaft (08) extends to the top of handle (02) upward.

5. The self-locking concrete slab hoist of claim 1, wherein, The second rotating shaft (08) is equipped with a rough surface friction section (10).

6. The self-locking concrete slab hoist of claim 1, wherein, The height of the clamping groove (11) is the same as the friction section (10).

7. The self-locking concrete slab hoist of claim 1, wherein, The fixed plug (13) is a rubber structure with elasticity.

8. The self-locking concrete slab hoist of claim 1, wherein, The thickness of the clamping groove (11) increases from top to bottom.

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