Device for automatically hooking ton bags

Abstract

An automatic hook-and-hook device for four corner lifting lugs of a ton bag includes a bag-lifting frame. Each of the four lower corners of the bag-lifting frame is equipped with a hook mechanism and a lifting lug connection mechanism along the diagonal direction. The hook mechanism includes a vertical base plate, with a hook cylinder on the side of the base plate. The lower end of the cylinder rod of the hook cylinder is hinged to the upper end of a swing arm, and the lower part of the swing arm is hinged to the vertical base plate. A hook is provided between the swing arm and the vertical base plate, and the hook and the swing arm can rotate coaxially. The lifting lug connection mechanism includes a vertical connecting frame, with a hook lifting cylinder on the connecting frame. The lower end of the cylinder rod of the hook lifting cylinder is equipped with a hook translation cylinder. The front end of the cylinder rod of the hook translation cylinder is equipped with a hook mounting plate, and the upper end of the hook mounting plate is equipped with a lifting lug support plate. The middle part of the hook mounting plate is hinged to the rear end of the hook, and the middle part of the hook is hinged to the upper end of the cylinder rod of the hook swing cylinder. The front end of the hook is equipped with a hook rod that curves upwards. This invention can automatically hook onto the four corners of a ton bag with the lifting lugs already extended.

Description

Technical Field

[0001] This invention relates to a device for automatically hooking the four corner lugs of a ton bag, belonging to the field of packaging machinery. Background Technology

[0002] Patent document CN216103040U discloses an automatic clamping device for the four corner lifting lugs of a ton bag. After the bagging mechanism lifts the empty bag, the four corner lifting lugs of the ton bag hang naturally. The clamping mechanism then clamps these lugs, completing the automatic packaging of the ton bag. The drawback of this solution is that the clamping mechanism can cause some damage to the lifting lugs, and the inconsistent clamping positions of the four lugs can lead to a tilted ton bag. In actual production, another type of ton bag is used where the four corner lifting lugs are stacked on top of the empty bag. The bagging mechanism opens the four corner lifting lugs B of the empty bag A as follows: Figure 3 As shown in the diagram, the ton bag packaging machine needs to be able to automatically hook onto the lifting lug B in order to complete the automatic packaging of the ton bag. Summary of the Invention

[0003] In order to automatically hook the four corner lifting lugs B of the ton bag and realize the automatic packaging of the ton bag, the present invention proposes an automatic hooking device for the four corner lifting lugs of the ton bag. It includes a bag lifting frame 1, and each of the four lower corners of the bag lifting frame 1 is provided with a hook mechanism 2. The hook mechanism 2 is provided with a lifting lug connection mechanism 3 on the outside of the hook mechanism 2. The hook mechanism 2 and the lifting lug connection mechanism 3 are both arranged along the diagonal direction of the bag lifting frame 1. Two adjacent sets of hook mechanisms 2 are symmetrically arranged about the X-axis or Y-axis, and two adjacent sets of lifting lug connection mechanisms 3 are symmetrically arranged about the X-axis or Y-axis.

[0004] The hook mechanism 2 includes a vertical base plate 21. A hook cylinder 22 is provided on the side of the vertical base plate 21. The lower end of the cylinder rod of the hook cylinder 22 is hinged to the upper end of the swing arm 23. The cylinder body of the hook cylinder 22 is hinged to the vertical base plate 21. The lower part of the swing arm 23 is hinged to the vertical base plate 21. The swing arm 23 is provided with a waist-shaped pin hole. A hook 24 is provided between the swing arm 23 and the vertical base plate 21. The hook 24 and the swing arm 23 can rotate coaxially. A locking block 28 is provided at the lower part of the vertical base plate 21 near the upper end of the hook 24. A compression torsion spring 27 is provided on the outer side of the locking block 28. The compression torsion spring 27 presses the locking block 28 against the protrusion at the upper end of the hook 24. A detection bracket 26 is provided at the lower end of the vertical base plate 21. A detection support plate 25 is provided at the lower end of the detection bracket 26. The end of the detection support plate 25 is hinged to the detection bracket 26. The detection support plate 25 is located inside the hook 24 above.

[0005] The hook 24 includes a hook-shaped hook body 241 with an arc end face at the upper end and a boss 243 on the arc end face. The upper side of the hook body 241 is also provided with a rotating lever 242, which is inserted into the waist-shaped pin hole on the swing arm 23.

[0006] The lifting lug connection mechanism 3 includes a vertical connecting frame 31, on which a hook lifting cylinder 32 is provided. The lower end of the cylinder rod of the hook lifting cylinder 32 is provided with a hook translation cylinder 33. The front end of the cylinder rod of the hook translation cylinder 33 is provided with a hook mounting plate 34. The upper end of the hook mounting plate 34 is provided with a lifting lug support plate 35 with a notch in the middle. The middle part of the hook mounting plate 34 is hinged to the rear end of the hook 36. The middle part of the hook 36 is hinged to the upper end of the cylinder rod of the hook swing cylinder 37. The cylinder body of the hook swing cylinder 37 is hinged to the lower end of the hook mounting plate 34. The front end of the hook 36 is provided with a hook rod that bends upward and can swing within the notch of the lifting lug support plate 35.

[0007] The working principle of this invention is: A. The bagging mechanism moves the empty bag A, which has been opened by the four corner lifting lugs B, to the inner side enclosed by the four hook mechanisms 2, and makes the lifting lugs B higher than the upper end of the hook 36, as shown. Figure 7 As shown; B. The hook lifting cylinder 32 drives the hook translation cylinder 33 to descend, the hook translation cylinder 33 drives the hook 36 to move horizontally inward, and the hook swing cylinder 37 drives the hook 36 to swing upward, making the hook rod higher than the lifting lug support plate 35. The bagging mechanism moves the empty bag A and the lifting lug B downward a certain distance, so that the lower end of the lifting lug B is close to the lifting lug support plate 35. At this time, the hook rod penetrates into the interior of the lifting lug B. Figure 8 As shown; C. The bagging mechanism releases the lifting lug B, and the hook translation cylinder 33 drives the hook 36 to move outward a certain distance, causing the hook rod to tighten the lifting lug B. At the same time, the lifting lug support plate 35 supports the lifting lug B. Figure 9 As shown; D. The hook 24 swings upward, and the hook lifting cylinder 32 drives the hook 36 and the lifting lug support plate 35 to rise to the junction position. The lifting lug B lifts the detection support plate 25, causing the detection switch to send a "lifting lug present" signal. Figure 10 As shown; E. The hook 24 swings downward to the locked position, causing the hook body 241 to pass into the lifting lug B, thus confining the lifting lug B between the hook 24 and the detection bracket 26. Figure 11 As shown; F. Hook 36 swings downward and retracts, causing the hook rod to disengage from lifting lug B. Hook translation cylinder 33 drives hook 36 to move horizontally outward to the initial position, completing the handover and hooking action of lifting lug B, and entering the automatic ton bag packaging process.

[0008] The beneficial effects of this invention are: The lifting lug B is transferred to the hook mechanism 2 by the lifting lug transfer mechanism 3, thereby realizing the function of automatically hooking the four corner lifting lugs of the ton bag and providing technical support for the automatic packaging of ton bags. The clamping torsion spring 27, locking block 28 and boss 243 can prevent the hook 24 from accidentally disengaging due to the pulling force of the lifting lug B on the hook 24 during the packaging process, thereby improving the reliability of the automatic ton bag packaging machine. The detection support plate 25 is used to detect whether the hook 24 has hooked the lifting lug B, thereby improving the operational reliability of the ton bag packaging machine. Attached Figure Description

[0009] Figure 1 This is a three-dimensional isometric view of the present invention.

[0010] Figure 2 This is a top view of the present invention.

[0011] Figure 3 This is a schematic diagram showing the ton bag A unfolded and the lifting lug B extended.

[0012] Figure 4 This is a schematic diagram of the hook mechanism 2.

[0013] Figure 5 This is a structural schematic diagram of hook 24.

[0014] Figure 6 This is a schematic diagram of the lifting lug transfer mechanism 3.

[0015] Figure 7 This is a schematic diagram showing the state of ton bag A being transferred to the inside of the four hook mechanisms 2.

[0016] Figure 8 This is a schematic diagram showing the state of the hook rod inserted into the lifting lug B.

[0017] Figure 9 This is a partial schematic diagram showing the state of the hook rod tightening the lifting lug B.

[0018] Figure 10 This is a partial schematic diagram showing the lifting lug B being lifted to the handover position by hook 36.

[0019] Figure 11 This is a partial schematic diagram of the hook body 241 penetrating into the lifting lug B.

[0020] Figure 12 This is a partial schematic diagram showing the state of the lifting lug B hook after it has been hooked. Detailed Implementation

[0021] For detailed embodiments of the present invention, please refer to Figures 1-12An automatic hook-and-hook device for the four corner lifting lugs of a ton bag includes a bag-lifting frame 1. Each of the four lower corners of the bag-lifting frame 1 is provided with a hook mechanism 2. The outside of the hook mechanism 2 is provided with a lifting lug connection mechanism 3. The hook mechanism 2 and the lifting lug connection mechanism 3 are both arranged along the diagonal direction of the bag-lifting frame 1. Two adjacent sets of hook mechanisms 2 are symmetrically arranged about the X-axis or Y-axis. Two adjacent sets of lifting lug connection mechanisms 3 are symmetrically arranged about the X-axis or Y-axis.

[0022] The aforementioned hook mechanism 2 includes a vertical base plate 21. A hook cylinder 22 is provided on the side of the vertical base plate 21. The lower end of the cylinder rod of the hook cylinder 22 is hinged to the upper end of the swing arm 23. The cylinder body of the hook cylinder 22 is hinged to the vertical base plate 21. The lower part of the swing arm 23 is hinged to the vertical base plate 21. The swing arm 23 is provided with a waist-shaped pin hole. A hook 24 is provided between the swing arm 23 and the vertical base plate 21. The hook 24 and the swing arm 23 can rotate coaxially. The hook 24 includes a hook-shaped hook body 241. The upper end of the hook body 241 is an arc end face. A boss 243 is provided on the arc end face. The upper side of the hook body 241 is also provided with a rotating lever 242, which is inserted into the waist-shaped pin hole on the swing arm 23. The lower part of the vertical base plate 21 near the upper end of the hook 24 is also provided with a locking block 28. The outer side of the locking block 28 is provided with a compression torsion spring 27, which presses the locking block 28 against the boss 243 at the upper end of the hook 24. The lower end of the vertical base plate 21 is provided with a detection bracket 26, and the lower end of the detection bracket 26 is provided with a detection support plate 25. The end of the detection support plate 25 is hinged to the detection bracket 26, and the detection support plate 25 is located inside the hook 24.

[0023] The aforementioned lifting lug handover mechanism 3 includes a vertical connecting frame 31, on which a hook lifting cylinder 32 is provided. The lower end of the cylinder rod of the hook lifting cylinder 32 is provided with a hook translation cylinder 33. The front end of the cylinder rod of the hook translation cylinder 33 is provided with a hook mounting plate 34. The upper end of the hook mounting plate 34 is provided with a lifting lug support plate 35 with a notch in the middle. The middle part of the hook mounting plate 34 is hinged to the rear end of the hook 36. The middle part of the hook 36 is hinged to the upper end of the cylinder rod of the hook swing cylinder 37. The cylinder body of the hook swing cylinder 37 is hinged to the lower end of the hook mounting plate 34. The front end of the hook 36 is provided with a hook rod that curves upward and can swing within the notch of the lifting lug support plate 35.

Claims

1. A device for automatically hooking the four corner lugs of a ton bag, comprising a bag-lifting frame (1), wherein hook mechanisms (2) are provided at the lower ends of the four corners of the bag-lifting frame (1), characterized in that: The hook mechanism (2) is provided with a lug connection mechanism (3) on the outside. The hook mechanism (2) and the lug connection mechanism (3) are both arranged along the diagonal direction of the bag frame (1). Two adjacent sets of hook mechanisms (2) are symmetrically arranged about the X-axis or Y-axis, and two adjacent sets of lug connection mechanisms (3) are symmetrically arranged about the X-axis or Y-axis. The hook mechanism (2) includes a vertical base plate (21), a hook cylinder (22) is provided on the side of the vertical base plate (21), the lower end of the cylinder rod of the hook cylinder (22) is hinged to the upper end of the swing arm (23), the cylinder body of the hook cylinder (22) is hinged to the vertical base plate (21), the lower part of the swing arm (23) is hinged to the vertical base plate (21), the swing arm (23) is provided with a waist-shaped pin hole, a hook (24) is provided between the swing arm (23) and the vertical base plate (21), the hook (24) and the swing arm (23) can rotate coaxially, the hook (24) includes a hook-shaped hook body (241), a rotating lever (242) is provided on the upper side of the hook body (241), and the rotating lever (242) is inserted into the waist-shaped pin hole on the swing arm (23); The lifting lug handover mechanism (3) includes a vertical connecting frame (31), on which a hook lifting cylinder (32) is provided. The lower end of the cylinder rod of the hook lifting cylinder (32) is provided with a hook translation cylinder (33). The front end of the cylinder rod of the hook translation cylinder (33) is provided with a hook mounting plate (34). The upper end of the hook mounting plate (34) is provided with a lifting lug support plate (35) with a notch in the middle. The middle part of the hook mounting plate (34) is hinged to the rear end of the hook (36). The middle part of the hook (36) is hinged to the upper end of the cylinder rod of the hook swing cylinder (37). The cylinder body of the hook swing cylinder (37) is hinged to the lower end of the hook mounting plate (34). The front end of the hook (36) is provided with a hook rod that bends upward and can swing within the notch of the lifting lug support plate (35).

2. The device for automatically hooking the four corner lugs of a ton bag according to claim 1, characterized in that: The upper end of the hook body (241) is an arc end face, and a boss (243) is provided on the arc end face. The lower part of the vertical base plate (21) near the upper end of the hook (24) is also provided with a locking block (28). A compression torsion spring (27) is provided on the outside of the locking block (28). The compression torsion spring (27) presses the locking block (28) against the boss (243) at the upper end of the hook (24).

3. The device for automatically hooking the four corner lugs of a ton bag according to claim 1, characterized in that: The lower end of the vertical base plate (21) is provided with a detection bracket (26), and the lower end of the detection bracket (26) is provided with a detection support plate (25). The end of the detection support plate (25) is hinged to the detection bracket (26), and the detection support plate (25) is located above the inside of the hook (24).

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