Lifting hook and lifting appliance for ton bag
By designing a hook for ton bags with a weight greater at the top than at the bottom, the hook can automatically detach from the straps by utilizing the difference in gravity. This solves the problem of manual detachment after ton bag hoisting, saves labor costs, and improves hoisting efficiency.
Patent Information
- Application Number
- CN202423090807.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-13
AI Technical Summary
The existing ton bag lifting hooks require a dedicated person to manually remove the straps from the hook when it is lifted to the designated position, resulting in high labor costs.
Design a hook for ton bags, where the weight of the upper part of the hook is greater than that of the lower part. By utilizing the difference in gravity, the hook will automatically rotate when no force is applied, thereby achieving automatic unhooking of the strap and reducing manual intervention.
It enables automatic unhooking of ton bag straps, saving labor costs, eliminating the need for dedicated personnel at the unloading point, and improving hoisting efficiency.
Smart Images
Figure CN223547573U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lifting hook technology, specifically to a lifting hook and lifting device for ton bags. Background Technology
[0002] Existing ton bag lifting hooks typically require a specialist to attach the ton bag's strap to the hook during lifting, and another specialist to remove the strap from the hook once the ton bag is in position, resulting in high labor costs. Therefore, there is an urgent need for a ton bag lifting hook and lifting device to solve these problems. Utility Model Content
[0003] To address the technical problem of requiring a dedicated person to remove the bag's strap from the hook when it is hoisted to the designated position, this invention provides a hook and lifting device for ton bags. When the ton bag is hoisted to the designated position, because the weight of the upper part of the hook is greater than the weight of the lower part, the upper part of the hook can drive the hook to rotate, thereby automatically separating the lower part of the hook from the bag's strap. This achieves automatic unhooking of the bag's strap, eliminating the need for dedicated personnel at the unloading point and saving labor costs.
[0004] This utility model provides a hook for ton bags, including a U-shaped base and a hook body that are rotatably connected. The middle part of the hook body is rotatably connected to the lower part of the two side walls of the U-shaped base. The length of the upper part of the hook body is less than the length of the opening on the U-shaped base. The upper end of the hook body is provided with a stop block to prevent the upper part of the hook body from completely entering the opening on the U-shaped base. The upper part of the hook body and the stop block are integrally formed. The weight of the upper part of the hook body is greater than the weight of the lower part of the hook body. The lower part of the hook body is set as a hook-shaped opening.
[0005] Furthermore, the middle part of the hook body is rotatably connected to the lower part of the two side walls of the U-shaped seat via a first pivot pin.
[0006] Furthermore, the weight of the upper part of the hook is twice the weight of the lower part of the hook.
[0007] Compared with the prior art, this utility model has the following technical effects: Since the weight of the upper part of the hook is greater than the weight of the lower part of the hook, when the hook is not in use, the upper part of the hook will drop and the lower part of the hook will be above the upper part. At this time, the structure is in an inverted state. When in use, at the loading point of the ton bag, a person lifts the hook so that the upper part of the hook rotates upward and the lower part of the hook rotates downward. The upper part of the hook is above the lower part of the hook, and the hook-shaped opening of the hook faces upward. Then, the ton bag's strap is hung on the hook-shaped opening of the hook. Since the weight of the ton bag is much greater than the counterweight of the upper part of the hook, the overall force on the hook is always downward, and the hook will not rotate. When the bag is hoisted to the unloading point, the hook descends as a whole. Once the bag is securely placed, the hook continues to descend. At this point, the hook is no longer under load. Since the weight of the upper part of the hook is greater than the weight of the lower part, the upper part of the hook rotates downward and the lower part rotates upward, so that the upper part of the hook is below the lower part, and the hook-shaped opening faces downward. The bag's straps automatically detach, and no special personnel are required to be on duty at the unloading point, saving labor costs.
[0008] This utility model provides a lifting device for ton bags, including a lifting base and a plurality of ton bag lifting hooks as described above. Each hook is rotatably mounted on the lower part of the lifting base, and the hook bodies of the plurality of hooks all face outward from the lifting base. In use, the ton bag lifting device allows the multiple hooks to work together on a single ton bag, or the multiple hooks to work on different ton bags separately.
[0009] Furthermore, the lifting base includes two crossbeams and a connecting beam. The two crossbeams are arranged opposite each other, and the two connecting beams are respectively fixedly connected between the two ends of the two crossbeams. Cross reinforcing ribs are provided between the two crossbeams and the connecting beams, and multiple fixing plates are provided on the cross reinforcing ribs. The bottom wall of the U-shaped seat on the hook is rotatably mounted on the fixing plates. The lifting base has strong structural stability.
[0010] Furthermore, each of the fixing plates is provided with multiple fixing holes, and the bottom wall of the U-shaped seat on each hook and one of the fixing holes on a single fixing plate are rotatably connected by a second pivot pin. Multiple hooks can change their positions on the fixing plates to allow multiple hooks to work together to handle ton bags of different sizes.
[0011] Furthermore, the lifting device also includes a chain, one end of which is fixedly connected to the center of the cross reinforcing ribs and located in the middle of multiple fixing plates, and the other end of which is fixedly connected to a hook; each of the crossbeams is designed as a square pipe.
[0012] Furthermore, the lifting device also includes multiple lifting ropes, and multiple lifting rings are provided on the upper part of both crossbeams. One end of each of the multiple lifting ropes is fixedly connected to the multiple lifting rings, and the other end of each of the multiple lifting ropes is used to be fixedly connected to the lifting structure on the crane.
[0013] Compared with existing technologies, this utility model has the following technical advantages: For ton bag lifting devices, a designated person hangs the ton bag's strap on the lower part of the hook. When the ton bag is lifted to the designated position, the hook no longer bears the weight of the ton bag. Because the weight of the upper part of the hook is greater than the weight of the lower part, the upper part of the hook rotates downwards and the lower part rotates upwards, thus automatically separating the lower part of the hook from the ton bag's strap, achieving automatic unhooking. The unloading point of the ton bag does not require dedicated personnel, saving labor costs. Furthermore, the entire hook can rotate relative to the lifting base, further facilitating the connection or separation of the lower part of the hook from the ton bag's strap. Attached Figure Description
[0014] Figure 1 This is a structural schematic diagram of a ton bag lifting hook according to Embodiment 1 of this utility model;
[0015] Figure 2 This is a schematic diagram of the structure of the hook when it is lifted according to Embodiment 1 of this utility model;
[0016] Figure 3 This is a side view of the lifting device according to Embodiment 1 of this utility model;
[0017] Figure 4 This is a cross-sectional structural schematic diagram of the stop block according to Embodiment 1 of this utility model;
[0018] Figure 5 This is a bottom view structural diagram of a ton bag lifting device according to Embodiment 2 of this utility model;
[0019] Figure 6 This is a front view structural schematic diagram of the hanging seat according to Embodiment 2 of this utility model;
[0020] The numbers in the attached diagram are:
[0021] 1. Hook; 11. U-shaped seat; 12. Hook body; 121. Stop block;
[0022] 2. Lifting bracket; 21. Crossbeam; 22. Connecting beam; 23. Cross reinforcing rib; 24. Fixing plate; 241. Fixing hole; 25. Lifting ring;
[0023] 3. Chain; 31. Hook. Detailed Implementation
[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0025] like Figures 1-4As shown in Embodiment 1, a hook for ton bags includes a U-shaped base 11 and a hook body 12 rotatably connected. The middle part of the hook body 12 is rotatably connected to the lower parts of the two side walls of the U-shaped base 11. The upper and lower parts of the hook body 12 are respectively located on both sides of the U-shaped base 11. The length of the upper part of the hook body 12 is less than the length of the opening on the U-shaped base 11 to avoid affecting the rotation of the hook body 12 relative to the U-shaped base 11. The weight of the upper part of the hook body 12 is greater than the weight of the lower part of the hook body 12. Specifically, the weight of the upper part of the hook body 12 is twice the weight of the lower part of the hook body 12. Taking the rotatable connection point between the middle part of the hook body 12 and the U-shaped base 11 as the center point, see [reference needed]. Figure 1 The part located to the left of the center point is the upper part of the hook body 12, and the part located to the right of the center point is the lower part of the hook body 12. The lower part of the hook body 12 is configured with a hook-shaped opening, that is, the lower part of the hook body 12 has a hook opening.
[0026] Since the weight of the upper part of the hook 12 is greater than the weight of the lower part of the hook 12, when the hook 1 is not in use, the upper part of the hook 12 will drop and the lower part of the hook 12 will be on top, at which time the structure 12 is in an inverted state.
[0027] At the loading point of the ton bag, a designated person lifts the hook 1, causing the upper part of the hook body 12 to rotate upward and the lower part of the hook body 12 to rotate downward. The upper part of the hook body 12 is located above the lower part of the hook body 12, and the hook-shaped opening of the hook body 12 faces upward. Then, the ton bag's hanging strap is suspended on the hook-shaped opening of the hook body 12. Since the weight of the ton bag is much greater than the counterweight of the upper part of the hook body 12, the overall force on the hook 1 is always downward, and the hook body 12 will not rotate.
[0028] When the bag is hoisted to the unloading point, hook 1 descends as a whole. Once the bag is securely placed, hook 1 continues to descend. At this point, hook 1 is no longer under load. Because the weight of the upper part of hook 1 is greater than the weight of the lower part, the upper part of hook 12 rotates downwards, and the lower part rotates upwards, so that the upper part of hook 12 is below the lower part, with the hook-shaped opening facing downwards. This allows the bag's strap to automatically disengage. No dedicated personnel are required at the unloading point, saving labor costs. Multiple hooks can work together on a single bag, or multiple hooks can work on different bags separately.
[0029] In this embodiment, a designated person hangs the bag's strap on the lower part of the hook body 12 on the hook 1. When the bag is hoisted to the designated position, the hook body 12 no longer bears the weight of the bag. Since the weight of the upper part of the hook body 12 is greater than the weight of the lower part, the upper part of the hook body 12 rotates downward and the lower part rotates upward, thereby automatically separating the lower part of the hook body 12 from the bag's strap. This achieves automatic unhooking of the bag's strap, eliminating the need for a designated person to be on duty at the bag's unloading point and saving labor costs.
[0030] In one possible implementation, the middle part of the hook body 12 is rotatably connected to the lower parts of the two side walls of the U-shaped seat 11 via a first axle pin. Both the middle part of the hook body 12 and the two side walls of the U-shaped seat 11 are provided with holes for the first axle pin to pass through. When the hook body 12 rotates, it actually rotates around the first axle pin as the center. Rotation via a axle pin is existing technology and will not be described in detail here.
[0031] In one possible implementation, the upper end of the hook body 12 is provided with a stop block 121 to prevent the upper part of the hook body 12 from completely entering the opening on the U-shaped seat 11. The upper part of the hook body 12 and the stop block 121 are integrally formed. See also Figure 4 The stop block 121 can prevent the upper part of the hook body 12 from completely entering the opening on the U-shaped seat 11, thereby preventing the upper part of the hook body 12 from being parallel to the U-shaped seat 11, ensuring that after the ton bag is released, the upper part of the structure 12 falls down in the preset direction, ensuring that the ton bag hanging bag falls off from the hook-shaped opening at the bottom of the hook body 12.
[0032] like Figures 5-6 As shown in Embodiment 2, a lifting device for ton bags includes a lifting base 2 and multiple ton bag lifting hooks 1 as described in any of the above embodiments. Each hook 1 is rotatably disposed at the lower part of the lifting base 2. Specifically, the hook 1 can rotate relative to the lifting base 2, and the hook bodies 12 on the multiple hooks 1 all face outwards from the lifting base 2. In use, the multiple hooks 1 of this embodiment can work together to operate on a single ton bag, or the multiple hooks 1 can operate on different ton bags separately. The lifting base 2 and the hooks 1 are made of steel.
[0033] In this embodiment of the ton bag lifting device, a designated person hangs the ton bag's strap on the lower part of the hook body 12 on the hook 1. When the ton bag is lifted to the designated position, because the weight of the upper part of the hook body 12 is greater than the weight of the lower part, the upper part of the hook body 12 can drive the upper part of the hook body 12 to rotate downwards and the lower part of the hook body 12 to rotate upwards. This causes the lower part of the hook body 12 to automatically separate from the ton bag's strap, achieving automatic unhooking of the ton bag's strap. The unloading point of the ton bag does not require dedicated personnel to be on duty, saving labor costs. Furthermore, the hook 1 as a whole can rotate relative to the lifting base 2, further facilitating the connection or separation of the lower part of the hook body 12 from the ton bag's strap.
[0034] In this embodiment, the ton bag lifting device can be used in conjunction with a forklift or overhead crane. When the forklift or overhead crane is in operation, it moves the ton bag lifting device and the ton bag.
[0035] In one possible implementation, the lifting base 2 includes two crossbeams 21 and a connecting beam 22. The two crossbeams 21 are arranged opposite each other, and the two connecting beams 22 are respectively fixedly connected between the two ends of the two crossbeams 21. A cross reinforcing rib 23 is provided between the two crossbeams 21 and the connecting beam 22. Multiple fixing plates 24 are provided on the cross reinforcing ribs 23. The bottom wall of the U-shaped seat 11 on the hook 1 is rotatably mounted on the fixing plate 24. The lifting base 2 in this embodiment has strong structural stability. Furthermore, each fixing plate 24 is provided with multiple fixing holes 241. The bottom wall of the U-shaped seat 11 on each hook 1 and one of the fixing holes 241 on a single fixing plate 24 are rotatably connected by a second axle pin. The bottom wall of the U-shaped seat 11 on the hook 1 is also provided with a hole for the second axle pin to pass through. When the hook 1 rotates, it actually rotates around the second axle pin. The method of rotation by axle pin is prior art and will not be described in detail here. The bottom walls of the U-shaped seats 11 on the multiple hooks 1 are rotatably connected to a fixing hole 241 at the same position on the multiple fixing plates 24 via a second shaft pin. The multiple hooks 1 can change their positions on the fixing plates 24 to allow the multiple hooks 1 to work together to operate on ton bags of different sizes.
[0036] As one possible implementation, the lifting device also includes a chain 3. One end of the chain 3 is fixedly connected to the center of the cross reinforcing rib 23 and located in the middle of multiple fixing plates 24. The other end of the chain 3 is fixedly connected to a hook 31. Each of the crossbeams 21 is a square pipe. In this embodiment, the ton bag lifting device is used in conjunction with a forklift. Specifically, the lifting base 2 of the lifting device is fixed to the forklift, that is, the two crossbeams 21 on the lifting base 2 are fitted onto the forklift's front forks, and the two can be fixed by welding. To prevent the lifting device from being unstable during use, the hook 31 on the other end of the chain 3 can be hooked onto the forklift's gantry to keep the lifting device stable. Furthermore, the chain links at both ends of the chain 3 are locked or welded to the center of the cross reinforcing rib 23 and the hook 31 to achieve a fixed connection.
[0037] In one possible implementation, the lifting device also includes multiple lifting ropes made of steel. Multiple lifting rings 25 are provided on the upper part of both crossbeams 21. One end of each lifting rope is fixedly connected to one of the lifting rings 25, and the other end of each lifting rope is fixedly connected to the lifting structure on the overhead crane. In this embodiment, the ton bag lifting device is used in conjunction with the overhead crane. The lifting seat 2 of the device is fixed to the overhead crane. Specifically, the other ends of the multiple lifting ropes are sleeved on the lifting structure on the overhead crane. At this time, the chain 3 and the hook 31 are not used. The chain 3 is wound around the center of the cross reinforcing rib 23, and the hook 31 is also located near the cross reinforcing rib 23 to avoid affecting the operation of the ton bag. Similarly, when the ton bag lifting device is used in conjunction with a forklift, the lifting ropes are also not used, and the lifting ropes can be separated from the lifting rings 25 to avoid affecting the operation of the ton bag. Furthermore, one end of each lifting rope is fixedly connected to the multiple lifting rings 25 using a locking method.
[0038] The embodiments described above are merely preferred embodiments of this utility model and are only used to explain this utility model. They are not intended to limit the scope of implementation of this utility model. For those skilled in the art, other implementation methods can be easily made by substitution or modification based on the technical content disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of this utility model should be included within the scope of the patent application of this utility model.
Claims
1. A lifting hook for ton bags, comprising a U-shaped base (11) and a hook body (12) rotatably connected, characterized in that, The middle part of the hook (12) is rotatably connected to the lower part of the two side walls of the U-shaped seat (11). The length of the upper part of the hook (12) is less than the length of the opening on the U-shaped seat (11). The upper end of the hook (12) is provided with a stop (121) to prevent the upper part of the hook (12) from completely entering the opening on the U-shaped seat (11). The upper part of the hook (12) and the stop (121) are integrally formed. The weight of the upper part of the hook (12) is greater than the weight of the lower part of the hook (12). The lower part of the hook (12) is set as a hook-shaped opening.
2. The lifting hook for ton bags according to claim 1, characterized in that, The middle part of the hook (12) is rotatably connected to the lower part of the two side walls of the U-shaped seat (11) by the first axle pin.
3. The lifting hook for ton bags according to claim 1, characterized in that, The weight of the upper part of the hook (12) is twice the weight of the lower part of the hook (12).
4. A lifting device for ton bags, characterized in that, It includes a lifting base (2) and a plurality of ton bag hooks (1) as described in any one of claims 1 to 3, each of the hooks (1) being rotatably disposed on the lower part of the lifting base (2), and the hook bodies (12) on the plurality of hooks (1) facing outward of the lifting base (2).
5. The lifting device for ton bags according to claim 4, characterized in that, The lifting seat (2) includes two crossbeams (21) and a connecting beam (22). The two crossbeams (21) are arranged opposite to each other and the two connecting beams (22) are respectively fixedly connected between the two ends of the two crossbeams (21). Cross reinforcing ribs (23) are provided between the two crossbeams (21) and the connecting beams (22). Multiple fixing plates (24) are provided on the cross reinforcing ribs (23). The bottom wall of the U-shaped seat (11) on the hook (1) is rotatably set on the fixing plates (24).
6. The lifting device for ton bags according to claim 5, characterized in that, Each of the fixing plates (24) is provided with multiple fixing holes (241), and the bottom wall of the U-shaped seat (11) on each hook (1) and one of the fixing holes (241) on the individual fixing plates (24) are rotatably connected by a second shaft pin.
7. The lifting device for ton bags according to claim 5, characterized in that, The lifting device also includes a chain (3), one end of which is fixedly connected to the center of the cross reinforcing rib (23) and located in the middle of multiple fixing pieces (24), and the other end of which is fixedly connected to a hook (31); each of the crossbeams (21) is set as a square pipe.
8. The lifting device for ton bags according to claim 5, characterized in that, The lifting device also includes multiple lifting ropes, and multiple lifting rings (25) are provided on the upper part of the two crossbeams (21). One end of each of the multiple lifting ropes is fixedly connected to the multiple lifting rings (25), and the other end of each of the multiple lifting ropes is used to be fixedly connected to the lifting structure on the crane.