Sling Unhooking Device for Square Cross-Section Hook and Operating Method for Loading and Unloading Scrap Hopper

Abstract

The present invention relates to a sling unhooking device for a square-section hook, which comprises a portal frame body. The portal frame body is tightly clamped with the square-section hook. Symmetrically arranged in the sliding grooves on both sides of the portal frame body are push rope mechanisms capable of sliding up and down, and symmetrically arranged on the outer side of the portal frame body are flipping clamping mechanisms capable of being clamped with the push rope mechanisms. The unhooking device of the present invention is applicable to a square-section hook, has a short structure and firm clamping. The push rope mechanism enables the steel cable to be unhooked smoothly, and the flipping clamping mechanism prevents the push rope mechanism from falling back, ensuring that the steel cable does not return into the hook head. The structure is safe and reliable. It avoids manual unhooking by personnel, improves efficiency and safety, eliminates potential safety hazards during the process of loading and unloading waste in the waste hopper, and reduces the labor intensity of personnel.

Description

Technical Field

[0001] The present invention relates to the field of cranes, and particularly to a sling unhooking device for a hook with a square cross-section. Background Art

[0002] When conducting on-site inspection of the surface of hot-rolled plates, it is necessary to unroll the coil. To cooperate with the unrolling, the head will be cut off and a large amount of waste plate heads will be generated. These waste plate heads will be collected online into a waste hopper and transported away after the waste hopper is full. For a long time, when loading these waste plate heads, since rope alignment for lifting must be used and there is only one hook available on the crane, every time the waste hopper dumps the waste plate heads, production personnel have to climb onto the carriage to manually remove the steel wire ropes at the front of the waste hopper so that after the hook is lifted again, the hopper will tilt to pour the waste plate heads into the carriage.

[0003] This operation brings several safety hazards: 1. The carriage board is more than two meters high, making it strenuous for production personnel to climb, and they have entered the high-altitude operation range without proper protection measures; 2. The waste plate heads in the carriage are stacked loosely, and it is easy for production personnel to step on the loose parts and fall, causing physical harm to the production personnel; 3. After the waste hopper enters the carriage, it often cannot be properly positioned, tilting or sticking to the side, causing great difficulties in unhooking the ropes. Sometimes, repeated unhooking and hooking are required, and two people need to cooperate to handle it, occupying labor.

[0004] The cross-section of the existing hooks in the steel plate inspection workshop is square, making it difficult to adapt to a hook release device to meet production requirements.

[0005] Patent application CN107487703A, a lifting and hanging pressure-resistant insulation hook release device, includes a locking ring; the locking ring is fixedly connected to an insulating sleeve, the insulating sleeve is connected to a connecting shaft through a swivel ring, the connecting shaft is connected to a snap ring base through a pin, both sides of the snap ring base are respectively equipped with a first locking mechanism and a second locking mechanism, a live pin is installed at the lower end of the snap ring base, and a steel column is inserted in the middle of the live pin. The structure of this patent is complex and not applicable to the existing hooks with a square cross-section. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a sling unhooking device for a hook with a square cross-section, so as to solve the problem that when using a hook with a square cross-section to lift and dump a waste hopper, manual unhooking is prone to safety hazards.

[0007] To achieve the above object, the present invention is realized by adopting the following technical solutions:

[0008] A sling unhooking device for a hook with a square cross-section, including a portal frame body, the portal frame body is tightly clamped with the hook with a square cross-section, symmetrically arranged in the sliding grooves on both sides of the portal frame body are rope pushing mechanisms capable of sliding up and down, and symmetrically arranged outside the portal frame body are flipping and clamping mechanisms capable of being clamped with the rope pushing mechanisms.

[0009] As a further solution of the present invention, the portal frame body includes a cross beam, vertical frames, clamping plates, pressing plates, and bolts. The vertical frames are symmetrically arranged. Clamping plates are provided at the bottoms of the vertical frames. The vertical frames and the clamping plates are of an integral structure. The two side vertical frames are fixedly connected by the cross beam. The outer sides of the clamping plates are fixedly connected with the pressing plates. A sliding groove is formed between the clamping plates and the pressing plates. The two side clamping plates are connected by bolts. A square frame body for clamping a square-section hook is formed among the cross beam, the vertical frames, the clamping plates, and the bolts.

[0010] As a further solution of the present invention, the rope pushing mechanism includes a sliding rod and a rope pushing frame. The upper part of the sliding rod is connected with the rope pushing frame. The rope pushing frame includes a rope pushing vertical plate, a rope pushing support rod, and a rope pushing inclined rod. The lower part of the sliding rod slides in the sliding groove. The upper part of the sliding rod is fixedly connected with the rope pushing vertical plate. A horizontally arranged rope pushing support rod is fixedly connected to the rope pushing vertical plate. A rope pushing inclined rod is connected between the rope pushing support rod and the rope pushing vertical plate. A sliding rod bayonet is provided in the middle of the sliding rod.

[0011] As a further solution of the present invention, the rope pushing support rod is arranged parallel to the clamping plate of the portal frame body.

[0012] As a further solution of the present invention, an inner right-angle sliding surface is formed between the sliding rod and the rope pushing vertical plate, and the inner right-angle sliding surface can fit and slide with the outer right-angle surface of the vertical frame of the portal frame body.

[0013] As a further solution of the present invention, the flipping and clamping mechanism includes a support arm, a flipping shaft, and a flipping plate. The support arm is fixedly connected with the pressing plate of the portal frame body. The support arm is movably connected with the flipping plate through the flipping shaft. A flipping plate bayonet is provided at the free outer end of the flipping plate.

[0014] As a further solution of the present invention, one end of the support arm is fixedly connected to the top end of the pressing plate of the portal frame body, and the support arm is horizontally arranged. The outer end of the support arm is connected with the flipping plate through the flipping shaft.

[0015] As a further solution of the present invention, the free outer end of the flipping plate is obliquely lapped with the outer side wall of the sliding rod of the rope pushing mechanism, and the free outer end of the flipping plate is in sliding contact with the surface of the outer side wall of the sliding rod.

[0016] As a further solution of the present invention, one end of the support arm is fixedly connected to the top end of the pressing plate of the portal frame body, and the support arm is horizontally arranged. The outer end of the support arm is connected with the flipping plate through the flipping shaft.

[0017] As a further solution of the present invention, the flipping plate bayonet is in fit connection with the sliding rod bayonet of the rope pushing mechanism.

[0018] The operation method of using a sling unhooking device with a square-section hook to load and unload a waste hopper specifically includes the following steps:

[0019] 1) When hoisting the waste material hopper, hang the two steel wire ropes and the hook unhooking device connected to the front and rear of the waste material hopper on the square-section hook. The two steel wire ropes are respectively hung on both sides of the hook unhooking device. The push rope frame of the push rope mechanism of the hook unhooking device is aligned with the direction of the opening of the waste material hopper, and the push rope frames of the push rope mechanisms on both sides are placed inside the steel wire ropes on the opening side of the waste material hopper;

[0020] 2) Hoist the waste material hopper above the carriage, lower the waste material hopper into the carriage, and continue to lower the square-section hook. When the bottom of the sliding rod of the push rope mechanism contacts the waste plate head in the waste material hopper and then slides upward, the push rope inclined rod on the upper part of the sliding rod pushes the steel wire rope on the opening side of the waste material hopper out of the square-section hook. When the sliding rod bayonet of the sliding rod rises to the top of the chute, the free outer end of the flap of the flipping and clamping mechanism slides into the sliding rod bayonet, and the flap bayonet and the sliding rod bayonet are clamped with each other to prevent the sliding rod from falling back;

[0021] 3) Lift the waste material hopper again. The single steel wire rope remaining on the square-section hook lifts the rear end of the waste material hopper, causing the waste material hopper to tilt, and the waste head is poured from the opening of the waste material hopper into the carriage.

[0022] As a further solution of the present invention, the opening of the waste material hopper is arranged at the front end of the waste material hopper.

[0023] Compared with the existing technology, the beneficial effects of the present invention are:

[0024] The hook unhooking device of the present invention is applicable to the square-section hook, has a short structure and firm clamping. The push rope mechanism enables the steel cable to be unhooked smoothly, and the flipping and clamping mechanism prevents the push rope mechanism from falling back, ensuring that the steel cable does not return into the hook head. The structure is safe and reliable. It avoids manual unhooking by personnel, improves efficiency and safety, eliminates potential safety hazards during the process of loading and unloading the waste of the waste material hopper, and reduces the labor intensity of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of a square-section hook.

[0026] Figure 2 It is a schematic diagram of the structure of the present invention.

[0027] Figure 3 It is a schematic diagram of a gantry frame.

[0028] Figure 4 It is a schematic diagram of the push rope mechanism.

[0029] Figure 5 It is a side view of the present invention.

[0030] Figure 6 It is a schematic diagram of the initial application state of the present invention.

[0031] Figure 7Schematic diagram of the application of the steel rope unhooking in the present invention.

[0032] In the figure: square cross-section hook 1, gantry frame 2, rope pushing mechanism 3, flipping and clamping mechanism 4, waste hopper 5;

[0033] Cross beam 21, vertical frame 22, clamping plate 23, pressing plate 24, bolt 25, sliding groove 26;

[0034] Slide bar 31, rope pushing vertical plate 32, rope pushing support rod 33, rope pushing inclined rod 34, slide bar bayonet 35;

[0035] Support arm 41, flipping shaft 42, flipping plate 43, flipping plate bayonet 44. Specific embodiments

[0036] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0037] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0038] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0039] Such as Figures 1-7 , the sling unhooking device of the square cross-section hook, including a gantry frame 2, the gantry frame 2 is tightly clamped with the square cross-section hook 1, symmetrically arranged in the sliding grooves 26 on both sides of the gantry frame 2 are rope pushing mechanisms 3 that can slide up and down, and symmetrically arranged outside the gantry frame 2 are flipping and clamping mechanisms 4 that can be clamped with the rope pushing mechanisms 3.

[0040] The described gantry frame 2 includes a cross beam 21, vertical frames 22, clamping plates 23, pressing plates 24, and bolts 25. The vertical frames 22 are symmetrically arranged. A clamping plate 23 is provided at the bottom of the vertical frame 22. The vertical frame 22 and the clamping plate 23 are of an integral structure. The tops of the two side vertical frames 22 are fixedly connected by the cross beam 21. The outer side of the clamping plate 23 is fixedly connected with the pressing plate 24. A chute 26 is formed between the clamping plate 23 and the pressing plate 24. The two side clamping plates 23 are connected by the bolt 25. A square frame for clamping the square-section hook 1 is formed among the cross beam 21, the vertical frame 22, the clamping plate 23, and the bolt 25.

[0041] The described rope-pushing mechanism 3 includes a sliding rod 31 and a rope-pushing frame. The upper part of the sliding rod 31 is connected to the rope-pushing frame. The rope-pushing frame includes a rope-pushing vertical plate 32, a rope-pushing support rod 33, and a rope-pushing inclined rod 34. The lower part of the sliding rod 31 slides in the chute 26. The upper part of the sliding rod 31 is fixedly connected to the rope-pushing vertical plate 32. A horizontally arranged rope-pushing support rod 33 is fixedly connected to the rope-pushing vertical plate 32. A rope-pushing inclined rod 34 is connected between the rope-pushing support rod 33 and the rope-pushing vertical plate 32. A sliding rod bayonet 35 is provided in the middle of the sliding rod 31.

[0042] The described rope-pushing support rod 33 is arranged parallel to the clamping plate 23 of the gantry frame 2.

[0043] An inner right-angle sliding surface is formed between the sliding rod 31 and the rope-pushing vertical plate 32, and the inner right-angle sliding surface can fit and slide with the outer right-angle surface of the vertical frame 22 of the gantry frame 2.

[0044] The described flipping and clamping mechanism 4 includes a support arm 41, a flipping shaft 42, and a flipping plate 43. The support arm 41 is fixedly connected to the pressing plate 24 of the gantry frame 2. The support arm 41 is movably connected to the flipping plate 43 through the flipping shaft 42. A flipping plate bayonet 44 is provided at the free outer end of the flipping plate 43.

[0045] One end of the described support arm 41 is fixedly connected to the top end of the pressing plate 24 of the gantry frame 2, and the support arm 41 is horizontally arranged. The outer end of the support arm 41 is connected to the flipping plate 43 through the flipping shaft 42.

[0046] The free outer end of the described flipping plate 43 is obliquely lapped with the outer side wall of the sliding rod 31 of the rope-pushing mechanism 3, and the free outer end of the flipping plate 43 is in sliding contact with the surface of the outer side wall of the sliding rod 31.

[0047] The described flipping plate bayonet 44 is engaged and clamped with the sliding rod bayonet 35 of the rope-pushing mechanism 3.

[0048] The operation method of the sling unhooking device using a square-section hook for loading and unloading a waste hopper specifically includes the following steps:

[0049] 1) When hoisting the waste material hopper 5, hang the two steel wire ropes and the hook detachment device connected to the front and rear of the waste material hopper 5 on the square-section hook 1. The two steel wire ropes are respectively hung on both sides of the hook detachment device. The push rope frame of the push rope mechanism 3 of the hook detachment device is aligned with the opening direction of the waste material hopper, and the push rope frames of the push rope mechanisms 3 on both sides are placed inside the steel wire ropes on the opening side of the waste material hopper 5. The opening of the waste material hopper 5 is arranged at the front end of the waste material hopper 5;

[0050] 2) Hoist the waste material hopper 5 above the carriage, lower the waste material hopper 5 into the carriage, and continue to lower the square-section hook 1 so that the bottom of the sliding rod 31 of the push rope mechanism 3 contacts the waste plate head in the waste material hopper 5 and then slides upward. The push rope inclined rod 34 on the upper part of the sliding rod 31 pushes the steel wire rope on the opening side of the waste material hopper 5 out of the square-section hook 1. When the sliding rod bayonet 35 on the sliding rod 31 rises to the top of the sliding groove 26, the free outer end of the flap 43 of the flipping and clamping mechanism 4 slides into the sliding rod bayonet 44, and the flap bayonet 44 and the sliding rod bayonet 35 are clamped with each other to prevent the sliding rod 31 from falling back;

[0051] 3) Lift the waste material hopper 5 again. The single steel wire rope remaining on the square-section hook 1 hoists the rear end of the waste material hopper 5, causing the waste material hopper 5 to tilt, and the waste head to pour from the opening of the waste material hopper 5 into the carriage.

[0052] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention. In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without contradiction. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods. In addition, any combination can be made between various different embodiments of the present invention, as long as it does not violate the idea of the present invention, it should also be regarded as the content disclosed by the present invention.

[0053] To make the purpose, technical solution and technical effect of the present invention clearer, the technical solutions in the embodiments of the present invention are now described clearly and completely. However, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Combining the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0054] Embodiment 1

[0055] The sling unhooking device for a square-section hook includes a gantry frame 2, which tightly clamps the square-section hook 1. Symmetrically arranged in the sliding grooves 26 on both sides of the gantry frame 2 are push rope mechanisms 3 that can slide up and down, and symmetrically arranged on the outside of the gantry frame 2 are flip latching mechanisms 4 that can be latched with the push rope mechanisms 3.

[0056] The gantry frame 2 includes a cross beam 21, vertical frames 22, clamping plates 23, pressing plates 24, and pins 25. The vertical frames 22 are symmetrically arranged, and clamping plates 23 are provided at the bottoms of the vertical frames 22. The vertical frames 22 and the clamping plates 23 are of an integral structure. The tops of the two vertical frames 22 are fixedly connected by the cross beam 21. The outside of the clamping plates 23 is fixedly connected to the pressing plates 24. A sliding groove 26 is formed between the clamping plates 23 and the pressing plates 24. The two clamping plates 23 are connected by pins 25. A square frame for clamping the square-section hook 1 is formed among the cross beam 21, the vertical frames 22, the clamping plates 23, and the pins 25.

[0057] The push rope mechanism 3 includes a sliding rod 31 and a push rope frame. The upper part of the sliding rod 31 is connected to the push rope frame. The push rope frame includes a push rope vertical plate 32, push rope support rods 33, and push rope inclined rods 34. The lower part of the sliding rod 31 slides in the sliding groove 26. The upper part of the sliding rod 31 is fixedly connected to the push rope vertical plate 32. Horizontally arranged push rope support rods 33 are fixedly connected to the push rope vertical plate 32. Push rope inclined rods 34 are connected between the push rope support rods 33 and the push rope vertical plate 32. A sliding rod bayonet 35 is provided in the middle of the sliding rod 31.

[0058] The flip latching mechanism 4 includes a support arm 41, a flip shaft 42, and a flip plate 43. The support arm 41 is fixedly connected to the pressing plate 24 of the gantry frame 2. The support arm 41 is movably connected to the flip plate 43 through the flip shaft 42. A flip plate bayonet 44 is provided at the free outer end of the flip plate 43.

[0059] One end of the support arm 41 is fixedly connected to the top of the pressing plate 24 of the gantry frame 2, and the support arm 41 is horizontally arranged. The outer end of the support arm 41 is connected to the flip plate 43 through the flip shaft 42.

[0060] The flip plate bayonet 44 cooperates and latches with the sliding rod bayonet 35 of the push rope mechanism 3.

[0061] Embodiment 2

[0062] The sling unhooking device for a square-section hook includes a gantry frame 2, which tightly clamps the square-section hook 1. Symmetrically arranged in the sliding grooves 26 on both sides of the gantry frame 2 are push rope mechanisms 3 that can slide up and down, and symmetrically arranged on the outside of the gantry frame 2 are flip latching mechanisms 4 that can be latched with the push rope mechanisms 3.

[0063] The gantry frame body 2 includes a cross beam 21, vertical frames 22, clamping plates 23, pressing plates 24, and bolts 25. The vertical frames 22 are symmetrically arranged. The bottom of the vertical frames 22 is provided with clamping plates 23. The vertical frames 22 and the clamping plates 23 are of an integral structure. The tops of the two side vertical frames 22 are fixedly connected by the cross beam 21. The outer sides of the clamping plates 23 are fixedly connected with the pressing plates 24. A chute 26 is formed between the clamping plates 23 and the pressing plates 24. The two side clamping plates 23 are connected by the bolt 25. The bolt 25 is provided with a radial locking block. The pin holes of the clamping plates 23 are correspondingly provided with block notches. It can be fixed by rotating after the bolt is inserted. A square frame body for clamping the square-section hook 1 is formed among the cross beam 21, the vertical frames 22, the clamping plates 23, and the bolt 25.

[0064] The rope-pushing mechanism 3 includes a sliding rod 31 and a rope-pushing frame. The upper part of the sliding rod 31 is connected to the rope-pushing frame. The rope-pushing frame includes a rope-pushing vertical plate 32, a rope-pushing support rod 33, and a rope-pushing inclined rod 34. The lower part of the sliding rod 31 slides in the chute 26. The upper part of the sliding rod 31 is fixedly connected to the rope-pushing vertical plate 32. A horizontally arranged rope-pushing support rod 33 is fixedly connected to the rope-pushing vertical plate 32. A rope-pushing inclined rod 34 is connected between the rope-pushing support rod 33 and the rope-pushing vertical plate 32. A sliding rod bayonet 35 is provided in the middle of the sliding rod 31.

[0065] The rope-pushing support rod 33 is arranged parallel to the clamping plate 23 of the gantry frame body 2.

[0066] An inner right-angle sliding surface is formed between the sliding rod 31 and the rope-pushing vertical plate 32, and the inner right-angle sliding surface can fit and slide with the outer right-angle surface of the vertical frame 22 of the gantry frame body 2.

[0067] The flipping and clamping mechanism 4 includes a support arm 41, a flipping shaft 42, and a flipping plate 43. The support arm 41 is fixedly connected to the pressing plate 24 of the gantry frame body 2. The support arm 41 is movably connected to the flipping plate 43 through the flipping shaft 42. A flipping plate bayonet 44 is provided at the free outer end of the flipping plate 43.

[0068] One end of the support arm 41 is fixedly connected to the top end of the pressing plate 24 of the gantry frame body 2, and the support arm 41 is horizontally arranged. The outer end of the support arm 41 is connected to the flipping plate 43 through the flipping shaft 42.

[0069] The free outer end of the flipping plate 43 is obliquely lapped with the outer side wall of the sliding rod 31 of the rope-pushing mechanism 3, and the free outer end of the flipping plate 43 is in sliding contact with the surface of the outer side wall of the sliding rod 31.

[0070] The flipping plate bayonet 44 is engaged and clamped with the sliding rod bayonet 35 of the rope-pushing mechanism 3.

[0071] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill 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, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Sling unhooking device for a square-section hook, comprising a gantry frame which tightly clamps the square-section hook. On both sides of the gantry frame, there are symmetrically arranged rope-pushing mechanisms that can slide up and down in the chutes, and on the outside of the gantry frame, there are symmetrically arranged flipping and clamping mechanisms that can be engaged with the rope-pushing mechanisms. The gantry frame includes a cross beam, vertical frames, clamping plates, pressing plates, and pins. The vertical frames are symmetrically arranged. At the bottom of the vertical frames, there are clamping plates. The vertical frames and the clamping plates are of an integral structure. The two vertical frames are fixedly connected by a cross beam. On the outside of the clamping plates, there are fixedly connected pressing plates. A chute is formed between the clamping plates and the pressing plates. The two clamping plates are connected by pins. A square frame for clamping the square-section hook is formed among the cross beam, vertical frames, clamping plates, and pins. The rope-pushing mechanism includes a sliding rod and a rope-pushing frame. The upper part of the sliding rod is connected to the rope-pushing frame. The rope-pushing frame includes a rope-pushing vertical plate, rope-pushing support rods, and rope-pushing inclined rods. The lower part of the sliding rod slides in the chute. The upper part of the sliding rod is fixedly connected to the rope-pushing vertical plate. Horizontally arranged rope-pushing support rods are fixedly connected to the rope-pushing vertical plate. Rope-pushing inclined rods are connected between the rope-pushing support rods and the rope-pushing vertical plate. A sliding rod bayonet is provided in the middle of the sliding rod. The flipping and clamping mechanism includes a support arm, a flipping shaft, and a flipping plate. The support arm is fixedly connected to the pressing plate of the gantry frame. The support arm is movably connected to the flipping plate through the flipping shaft. A flipping plate bayonet is provided at the free outer end of the flipping plate.

2. The sling unhooking device for the square-section lifting hook according to claim 1, characterized in that, The rope-pushing support rods are arranged parallel to the clamping plates of the gantry frame.

3. The sling unhooking device for the square-section hook according to claim 1, characterized in that, The free outer end of the flipping plate is obliquely lapped with the outer side wall of the sliding rod of the rope-pushing mechanism, and the free outer end of the flipping plate is in sliding contact with the surface of the outer side wall of the sliding rod.

4. The sling unhooking device for the square-section hook according to claim 1, characterized in that, One end of the support arm is fixedly connected to the top end of the pressing plate of the gantry frame, and the support arm is horizontally arranged. The outer end of the support arm is connected to the flipping plate through the flipping shaft.

5. The sling unhooking device for the square-section lifting hook according to claim 1, characterized in that The flipping plate bayonet is engaged with the sliding rod bayonet of the rope-pushing mechanism.

6. The operating method for loading and unloading a waste hopper with a sling unhooking device of a square-section lifting hook according to claim 1, characterized in that, The specific steps include: 1) When hoisting a waste hopper, hang the two steel ropes and the unhooking device connected to the front and back of the waste hopper on the square-section hook. The two steel ropes are respectively hung on both sides of the unhooking device. The rope-pushing frames of the rope-pushing mechanisms of the unhooking device are in the same direction as the opening direction of the waste hopper, and the rope-pushing frames of the rope-pushing mechanisms on both sides are placed inside the steel ropes on the opening side of the waste hopper. 2) Hoist the waste hopper above the carriage, lower the waste hopper into the carriage, and continue to lower the square-section hook. When the bottom of the sliding rod of the rope-pushing mechanism contacts the waste plate head in the waste hopper and slides upward, the rope-pushing inclined rod at the upper part of the sliding rod pushes the steel rope on the opening side of the waste hopper out of the square-section hook. When the sliding rod bayonet of the sliding rod rises to the top of the chute, the free outer end of the flipping plate of the flipping and clamping mechanism slides into the sliding rod bayonet, and the flipping plate bayonet and the sliding rod bayonet are engaged with each other to prevent the sliding rod from falling back. 3) Lift the waste hopper again. The single steel rope remaining on the square-section hook hoists the rear end of the waste hopper, causing the waste hopper to tilt, and the waste head is poured from the opening of the waste hopper into the carriage.

7. The operating method according to claim 6, characterized in that, The opening of the waste hopper is provided at the front end of the waste hopper.

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