Unhooking prevention device of C-shaped hook lifting appliance

Abstract

The invention provides an anti-unhooking device for a C-shaped hook lifting appliance. The anti-unhooking device comprises a C-shaped lifting hook, an inclined bearing surface and a stop assembly, the stop assembly is composed of a stop sliding block inserted into the tail end of the C-shaped lifting hook in a sliding mode, a telescopic groove and a spring. An electrical cabinet is arranged at the upper end of the C-shaped lifting hook and internally provided with a battery, an inclination angle switch sensor, a wireless transceiver module and the like, and an alarm lamp is arranged on the outer side wall. The lifting lug is positioned at the top of the C-shaped lifting hook; the crane lifting hook is arranged at the top of the lifting lug; and the measuring scale is arranged on the upper side wall of the C-shaped lifting hook. The device has the three advantages that the stop sliding block can stretch out and draw back freely, and side-by-side operation of a plurality of steel coils is facilitated; the inclined bearing face and the telescopic sliding block are combined to form a buffering system, and collision is reduced to protect the surface of the steel coil. And the unhooking risk is remarkably reduced through double guarantee of mechanical stopping and electrical interlocking. The measuring scale assists in positioning and lifting precision, manual reset design simplifies maintenance, and safety, efficiency and reliability of steel coil lifting are integrally improved.

Description

Technical Field

[0001] The present invention relates to the technical field of material lifting equipment, and in particular to an anti-unhooking device for a C-type hook sling. Background Art

[0002] Traditional C-hook hoists present numerous safety hazards. During lifting, the uneven weight distribution of the coil, operational stability issues with the crane, and the complex lifting environment can easily cause the coil to tilt and slip, leading to unhooking. Once unhooking occurs, it not only damages the coil but can also pose a serious threat to surrounding equipment and personnel, resulting in significant economic losses and safety risks.

[0003] Some existing anti-unhooking devices have limitations when dealing with multiple coils that need to be separated before being lifted. The fixed stop structures used in some devices can hinder the coil separation operation, affecting production efficiency. Furthermore, the rigid stop components of some anti-unhooking devices can easily damage the coil surface and reduce its quality when they come into contact with the coil.

[0004] Furthermore, conventional technologies lack effective detection and control measures to prevent coil shedding. They are unable to monitor the coil's tilt angle in real time. When the tilt angle reaches a dangerous level, no timely action is taken to disable the crane from further lifting and issue an alarm. Consequently, effective electrical and mechanical coordination is lacking to prevent coil shedding. Therefore, developing a novel anti-decoupling device for C-hook spreaders is of great practical significance. Summary of the Invention

[0005] Based on the above purpose, the present invention provides a C-type hook sling anti-unhooking device

[0006] It includes a C-shaped hook, the lower top wall of the C-shaped hook is provided with an inclined supporting surface, the end of the inclined supporting surface is provided with a stop assembly for preventing the steel coil from slipping, the stop assembly includes a stop slider slidably inserted at the tail end of the C-shaped hook, the tail end of the C-shaped hook is provided with a telescopic groove adapted to the stop slider, the bottom of the telescopic groove is provided with a spring, the top of the spring is against the bottom of the stop slider, the upper end of the C-shaped hook is provided with an electrical box, the inside of the electrical box is provided with a battery, a tilt switch sensor and a wireless transceiver module, etc., and the outer wall of the electrical box is provided with an alarm light.

[0007] Furthermore, a lifting lug is provided on the top of the C-shaped hook, and a crane hook is provided on the top of the lifting lug.

[0008] Furthermore, a measuring ruler is provided on the upper side wall of the C-shaped hook.

[0009] Furthermore, the tilt switch sensor inside the electrical box is fixed to the top inner wall of the C-shaped hook by bolts, and its sensing surface is arranged parallel to the oblique supporting surface of the C-shaped hook.

[0010] Beneficial effects of the present invention:

[0011] Retractable stop design: The stop slider can be freely extended and retracted to avoid the difficulty of separation caused by fixed stops when multiple steel coils are placed side by side.

[0012] Inclined surface buffering feature: The inclined supporting surface is combined with the retractable slider to reduce the rigid collision between the steel coil and the stop assembly, thus protecting the surface quality of the steel coil.

[0013] Double safety guarantee: mechanical stop and electrical interlock work simultaneously to significantly reduce the risk of unhooking.

[0014] Convenient operation: The measuring ruler assists in coil positioning and improves lifting efficiency; the manual reset design simplifies the maintenance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] Figure 1 Schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0017] Figure 2 It is a front view structural schematic diagram of an embodiment of the present invention;

[0018] Figure 3 For the embodiment of the present invention Figure 2 A schematic diagram of the local structure enlargement (stop assembly structure);

[0019] Figure 4 Schematic diagram of the electrical structure operation flow of an embodiment of the present invention.

[0020] In the figure: 1. C-type hook; 2. Inclined supporting surface; 3. Electrical box; 4. Driving hook; 5. Warning light; 6. Lifting lug; 7. Stop slider; 8. Telescopic slot; 9. Spring; 14. Measuring ruler. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative methods for implementing certain known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0022] It should be noted that references in the specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. In addition, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0023] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0024] See Figures 1 to 4

[0025] 1. Structural composition

[0026] The present invention provides a C-hook sling anti-unhooking device, which mainly consists of the following parts:

[0027] C-type hook 1: The overall C-shaped structure is the main part of the device, and the lower top wall is provided with an inclined supporting surface 2.

[0028] Inclined supporting surface 2: provided on the lower top wall of the C-shaped hook 1, used for supporting the steel coil and having a buffering property.

[0029] Stop assembly: includes a stop slider 7, a telescopic slot 8 and a spring 9.

[0030] Stop slider 7: Sliding and inserted at the end of C-type hook 1

[0031] Telescopic slot 8: located at the end of the C-shaped hook 1, adapted to the stop slider 7

[0032] Spring 9: Located at the bottom of the telescopic slot 8, with the top against the bottom of the stop slider 7

[0033] Electrical system:

[0034] Electrical box 3: Installed on the upper end of the C-type hook 1

[0035] Internal components: battery, tilt switch sensor and wireless transceiver module, etc.

[0036] Warning light 5: installed on the outer wall of the electrical box 3

[0037] Other components:

[0038] Lifting eye 6: located on the top of C-hook 1

[0039] Driving hook 4: set on the top of the lifting eye 6

[0040] Measuring ruler 14: Set on the upper side wall of C-type hook 1

[0041] 2. Working Principle

[0042] 1. Mechanical anti-unhooking principle

[0043] This device adopts a mechanical anti-unhooking design, which is mainly achieved through the stop component:

[0044] The stopper slider 7, normally held in its extended position by the elastic force of the spring 9, forms a physical barrier to prevent the coil from slipping out of the opening of the C-hook. If the coil is hoisted and encounters external forces or shaking, the stopper slider effectively prevents it from falling off the hook.

[0045] The retractable design of the stop slider 7 is a key feature of this invention. When a coil needs to be loaded into or removed from the C-hook, the stop slider, under the action of an external force, compresses the spring 9 and retracts it into the retractable slot 8, facilitating coil loading and unloading. Once the external force is removed, the spring pushes the stop slider back to its extended position, ensuring the coil is securely locked in the hook.

[0046] 2. Electrical anti-unhooking principle

[0047] This device also adopts electrical interlock design to increase safety:

[0048] The tilt switch sensor is installed on the top inner wall of the C-hook 1, with its sensing surface parallel to the inclined support surface 2. When the C-hook tilts significantly during lifting, the tilt switch sensor detects this abnormal state and triggers the following safety measures through the electrical control system:

[0049] The activation warning light 5 flashes to provide a visual warning to the operator.

[0050] A stop signal is sent to the crane control system through the wireless transceiver module to control the crane lifting circuit to prevent further lifting operations.

[0051] This electrical interlock mechanism enables timely intervention in the early stages of abnormal situations, significantly reducing the risk of coil shedding.

[0052] 3. Comprehensive workflow

[0053] Loading phase:

[0054] The operator uses the crane to position the C-type spreader above the steel coil.

[0055] The stop slider 7 is manually pushed to be compressed into the telescopic slot 8 .

[0056] Align the opening of the C-type hook 1 with the steel coil and allow the steel coil to enter the hook.

[0057] Release the stop slider, and the spring 9 pushes the stop slider back to the extended state, locking the steel coil.

[0058] Lifting phase:

[0059] The operator can use the measuring ruler 14 to confirm that the position of the steel coil is correct.

[0060] The crane hook 4 slowly lifts the entire device and the steel coil through the lifting lug 6.

[0061] The weight of the steel coil acts on the inclined supporting surface 2 to form a stable support.

[0062] The stop slider 7 prevents the steel coil from moving toward the opening direction.

[0063] The tilt sensor monitors the device posture in real time to ensure safety.

[0064] Transportation stage:

[0065] During the transportation of the steel coil, if an abnormal tilt occurs, the tilt sensor immediately triggers the alarm light 5 and sends a stop signal.

[0066] The wireless transceiver module transmits the abnormal signal to the driving control system to execute an emergency stop.

[0067] The design of the inclined supporting surface 2 can buffer the vibration and impact during transportation and protect the surface quality of the steel coil.

[0068] Uninstallation phase:

[0069] After reaching the target position, slowly lower the C-hook 1 to an appropriate height.

[0070] Manually push the stop slider 7 to compress and release the lock.

[0071] Carefully remove the steel coil to complete the unloading operation.

[0072] Release the stop slider and the device returns to its initial state, ready for the next operation.

[0073] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0074] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A C-hook sling anti-unhooking device, comprising a C-hook (1), wherein the lower top wall of the C-hook (1) is provided with an inclined supporting surface (2), and the end of the inclined supporting surface (2) is provided with a stopper assembly for preventing the steel coil from slipping off, characterized in that: The stop assembly comprises a stop slider (7) slidably inserted into the tail end of the C-shaped hook (1); the tail end of the C-shaped hook (1) is provided with a telescopic slot (8) adapted to the stop slider (7); a spring (9) is provided at the bottom of the telescopic slot (8); the top of the spring (9) abuts against the bottom of the stop slider (7); an electrical box (3) is provided at the upper end of the C-shaped hook (1); a battery, a tilt switch sensor and a wireless transceiver module are provided inside the electrical box (3); and an alarm light (5) is provided on the outer wall of the electrical box (3).

2. The anti-unhooking device for C-hook sling according to claim 1, characterized in that: A lifting lug (6) is provided on the top of the C-shaped lifting hook (1), and a crane hook (4) is provided on the top of the lifting lug (6).

3. The anti-unhooking device for C-hook sling according to claim 1, characterized in that: The upper side wall of the C-shaped hook (1) is provided with a measuring ruler (14).

4. The anti-unhooking device for C-hook sling according to claim 1, characterized in that: The tilt switch sensor inside the electrical box (3) is fixed to the top inner wall of the C-shaped hook (1) by means of bolts, and its sensing surface is arranged parallel to the oblique supporting surface (2) of the C-shaped hook (1).

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