An automatic hooking device and method for a four-loop flexible bulk bag

Abstract

The present invention discloses an automatic hooking device for a four-ring flexible container bag. The rotation of the hook rod drives the hook body to approach or move away from the lifting ring, and the rotation of the hook body hooks or disengages from the lifting ring; the belt detection fork presses on the stopper when the hooking is not completed, and presses on the detection switch when the hooking is completed, for detecting whether the hooking of the lifting ring is successful; after unhooking, the hook rod and the hook body are reset, and the belt detection fork is reset by the reset spring. The present invention also discloses an automatic hooking method based on the above automatic hooking device. The present invention has reasonable design and simple structure, and the hooking and unhooking processes are easy to control, can meet the use requirements, and can completely replace manual operation to realize the automatic bag hanging and automatic unhooking of the flexible container bag.

Description

Technical Field

[0001] The present invention belongs to the technical field of packaging equipment, and particularly relates to an automatic hook device and method for a four-ring flexible container bag. Background Art

[0002] Common flexible container bags in China usually have four small lifting rings arranged at the four corners of the bag mouth. When packaging materials, it is necessary for workers to hang the four small lifting rings on the four hooks of the packaging machine respectively. After packaging is completed, the four hooks will automatically open to release the small lifting rings.

[0003] In the prior art, the design of the hook mainly meets the function of automatic unhooking. However, when performing fully automatic process operation for flexible container bag packaging, there is an urgent need to develop an automatic hook device for a four-ring flexible container bag that can not only meet automatic unhooking but also automatic hooking. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above defects and provide an automatic hook device for a four-ring flexible container bag. The hook rod rotates to drive the hook body to approach or move away from the lifting ring, and the hook body rotates to hook or disengage from the lifting ring; the belt detection fork presses on the stop block when the hooking is not completed and presses on the detection switch when the hooking is completed, for detecting whether the hooking of the lifting ring is successful; after unhooking, the hook rod and the hook body are reset, and the belt detection fork is reset by the return spring. The present invention also provides an automatic hooking method based on the above automatic hook device. The present invention is reasonably designed, has a simple structure, is convenient to control the hooking and unhooking processes, can meet the use requirements, and can completely replace manual operation to realize the automatic bag hanging and automatic unhooking of the flexible container bag.

[0005] To achieve the above invention purpose, the present invention provides the following technical solutions:

[0006] An automatic hook device for a four-ring flexible container bag, comprising a fixed frame, a hook rod, a hook body, a belt detection fork and a return spring;

[0007] The fixed frame is fixedly installed on the ton packaging machine frame;

[0008] The upper end of the hook rod is connected to the fixed frame through a first rotating shaft, and the lower end is connected to the hook body through a second rotating shaft. The hook rod rotates around the first rotating shaft to drive the hook body to approach or move away from the lifting ring, and the hook body rotates around the second rotating shaft to hook or disengage from the lifting ring;

[0009] The belt detection fork is installed on the second rotating shaft. The installation point of the belt detection fork and the second rotating shaft is located between the upper end and the lower end of the belt detection fork. Taking the installation point as the boundary, the belt detection fork is divided into an upper section and a lower section;

[0010] The reset spring is sleeved on the second rotating shaft. One end of the reset spring is fixedly connected to the upper section of the belt detection fork, and the other end is fixedly connected to the hook rod. Above one side of the opening of the hook body, a detection switch is provided, and a stop block is provided above the other side of the hook body. When the hook body is disengaged from the hanging ring, the reset spring is in a non-compressed state, the upper section of the belt detection fork presses on the stop block, and the lower section of the belt detection fork is located at the opening of the hook body. When the hook body hooks the hanging ring, the hanging ring pushes the lower section of the belt detection fork to make the belt detection fork rotate around the second rotating shaft. At the same time, the reset spring is compressed. When the upper section of the belt detection fork presses on the detection switch, the hanging ring hook is completed.

[0011] Further, the above-mentioned automatic hanging hook device for a four-hanging-ring flexible container bag further includes a belt fork.

[0012] The belt fork is connected to the lower end of the hook rod through a third rotating shaft.

[0013] The belt fork is located on one side of the opening of the hook body.

[0014] The rotation of the third rotating shaft drives the belt fork to rotate, so that the hanging ring continues to move inward into the hook body after being hooked by the hook body.

[0015] Further, the hook rod includes an inner hook rod and an outer hook rod sleeved with each other. The upper end of the inner hook rod is connected to the fixed frame through a first rotating shaft, and the lower end of the outer hook rod is connected to the hook body through a second rotating shaft. A fastening seat is provided on the outer surface of the inner hook rod, and an adjusting screw rod parallel to the hook rod is provided on the outer surface of the outer hook rod. Through the cooperation of the adjusting screw rod and the fastening seat, the length of the part of the inner hook rod located inside the outer hook rod is adjusted to realize the adjustment of the length of the hook rod.

[0016] Further, the reset spring includes a torsion spring and straight connecting ends extending from both ends of the torsion spring.

[0017] The torsion spring is sleeved on the second rotating shaft, and the connecting ends extending from both ends of the torsion spring are respectively fixedly connected to the upper section of the belt detection fork and the hook rod.

[0018] Further, the above-mentioned automatic hanging hook device for a four-hanging-ring flexible container bag further includes a hook rod driving cylinder and a hook body driving cylinder.

[0019] The tail of the hook rod driving cylinder is fixed on the fixed frame, and the piston rod of the hook rod driving cylinder is connected to the hook rod, and is used to drive the hook rod to rotate around the first rotating shaft to drive the hook body to approach or move away from the hanging ring.

[0020] The tail of the hook body driving cylinder is fixed on the outer hook rod of the hook rod, and the piston rod of the hook body driving cylinder is connected to the hook body, and is used to drive the hook body to rotate around the second rotating shaft to hook or disengage from the hanging ring.

[0021] Further, the above-mentioned automatic hanging hook device for a four-hanging-ring flexible container bag further includes a belt fork driving cylinder.

[0022] The tail of the belt-pushing fork driving cylinder is fixed on the hook rod. The piston rod of the belt-pushing fork driving cylinder is connected to the third rotating shaft through a crank. The belt-pushing fork is fixedly connected to the third rotating shaft. The belt-pushing fork driving cylinder drives the third rotating shaft to rotate through the crank, and the rotation of the third rotating shaft drives the belt-pushing fork to rotate.

[0023] Further, both the stop block and the detection switch are fixedly installed on the outer hook rod of the hook rod.

[0024] Further, the belt detection fork is a U-shaped structure with an open upper end. The second rotating shaft passes through the lower end of the hook rod and the upper end of the hook body at the same time. Both sides of the U-shaped belt detection fork are respectively installed at both ends of the second rotating shaft;

[0025] There are two reset springs, which are respectively located between both sides of the U-shaped belt detection fork and the hook rod;

[0026] When the hook body is disengaged from the lifting ring, the reset spring is in a non-compressed state. The upper section of the belt detection fork presses on the stop block, and the lower section of the belt detection fork is sleeved outside the hook body to block the opening of the hook body.

[0027] Further, the belt-pushing fork is a U-shaped structure with an open upper end, and the belt-pushing fork is arranged outside the lower section of the belt detection fork;

[0028] Both sides of the upper end of the belt-pushing fork are fixedly connected to the belt-pushing fork mounting plate. There are several mounting holes on the belt-pushing fork mounting plate. After the screws are matched with the mounting holes, both sides of the upper end of the belt-pushing fork are fixed to both ends of the third rotating shaft. The matching of the screws with different mounting holes realizes the adjustment of the height of the belt-pushing fork relative to the hook body.

[0029] An automatic hooking method for a four-lifting-ring flexible container bag is realized by using the above automatic hooking device, and includes the following steps:

[0030] When the hook body is disengaged from the lifting ring, the reset spring is in a non-compressed state. The upper section of the belt detection fork presses on the stop block, and the lower section of the belt detection fork is located at the opening of the hook body;

[0031] The hook rod rotates around the first rotating shaft to drive the hook body to approach the lifting ring, and the hook body rotates around the second rotating shaft to hook the lifting ring;

[0032] When the hook body hooks the lifting ring, the lifting ring pushes the lower section of the belt detection fork to make the belt detection fork rotate around the second rotating shaft. At the same time, the reset spring is compressed. When the upper section of the belt detection fork presses on the detection switch, the hooking of the lifting ring is completed;

[0033] When the hook body is disengaged from the lifting ring, the belt detection fork section resets under the action of the reset spring, and the hook rod and the hook body reset.

[0034] The present invention has the following beneficial effects compared with the prior art:

[0035] (1) The automatic hooking device of the present invention first drives the hook body to rotate through the hook rod and realizes the hooking action of the lifting rings at the four corners of the flexible container bag by the relative rotation of the hook body with respect to the hook rod. Then, the band detection fork is used to ensure the successful hooking of the lifting ring, improving the accuracy of judging the successful hooking and providing an important basis for the automation of the related processes of the container bag.

[0036] (2) The present invention also designs a belt fork to ensure that after the hook body hooks the lifting ring, the lifting ring can move into the hook body in place. By cooperating the belt fork with the band detection fork, the stability of the hooking of the lifting ring is further improved.

[0037] (3) The lengths of the hook rod and the belt fork in the present invention can be flexibly adjusted, which is applicable to various types of hooks and has a wide application prospect.

[0038] (4) The automatic hooking device of the present invention is reasonably designed with a simple structure. The hooking and unhooking processes are easy to control, which can meet the use requirements, can completely replace manual operation to realize the automatic bag hanging and automatic unhooking of the flexible container bag, improving the work efficiency and reducing the labor cost. Brief Description of the Drawings

[0039] Figure 1 It is a schematic structural diagram of an automatic hooking device for a four-lifting-ring flexible container bag in a preferred embodiment of the present invention;

[0040] Figure 2 It is a schematic diagram of the spring reset of the band detection fork in a preferred embodiment of the present invention;

[0041] Figure 3 It is a three-dimensional structural diagram of an automatic hooking device for a four-lifting-ring flexible container bag in a preferred embodiment of the present invention;

[0042] In the figure:

[0043] 1 - fixing frame, 2 - hook rod, 3 - hook body, 4 - belt fork, 5 - band detection fork, 6 - hook rod driving cylinder, 7 - hook body driving cylinder, 8 - belt fork driving cylinder, 9 - return spring. Detailed Embodiments

[0044] The present invention will be described in detail below, and the features and advantages of the present invention will become clearer and more distinct with these descriptions.

[0045] The special word "exemplary" here means "serving as an example, embodiment or illustrative". Any embodiment described as "exemplary" here does not have to be construed as superior to or better than other embodiments. Although various aspects of the embodiment are shown in the drawings, the drawings do not have to be drawn to scale unless otherwise specified.

[0046] Such as Figure 1 、 2 and Figure 3As shown in the figure, an automatic hanger for a four - sling flexible container bag includes a fixed frame 1, a hook rod 2, a hook body 3, a belt - dialing fork 4, a belt - detecting fork 5, a hook - rod driving cylinder 6, a hook - body driving cylinder 7, a belt - dialing - fork driving cylinder 8, and a return spring 9.

[0047] The fixed frame 1 includes two fixed plates. The two fixed plates are fixed on the ton - packaging machine frame by four fastening screws. Each fixed plate is composed of a rectangular plate and an L - shaped arm plate extending from the right side of the rectangular plate. The end of the L - shaped arm plate is connected to the tail end of the hook - rod driving cylinder 6.

[0048] The hook rod 2 is composed of an inner hook rod and an outer hook rod which are sleeved with each other. An adjusting screw is provided on the left side of the outer hook rod, and a fastening seat is provided on the left side of the inner hook rod. The adjusting screw passes through the hole of the fastening seat. By adjusting the length of the adjusting screw, the length of the inner hook rod sleeved into the inner part of the outer hook rod can be changed, thereby changing the length of the hook rod 2. The upper part of the inner hook rod is connected to the fixed frame through a first rotating shaft. A support ear is provided on the right side of the upper part of the inner hook rod, and the support ear is connected to the piston rod of the hook - rod driving cylinder 6. The hook - rod driving cylinder 6 drives the inner hook rod to rotate around the first rotating shaft, and then drives the hook rod 2 and the hook body 3 to rotate around the first rotating shaft by a certain angle, so that the hook body 3 approaches the sling of the ton - bag. A cylinder seat is provided on the left - upper part of the outer hook rod and is connected to the tail end of the hook - body driving cylinder 7. A cylinder seat is provided on the right - upper part of the outer hook rod and is connected to the tail end of the belt - dialing - fork driving cylinder 8. Stopping blocks are respectively provided on the front and rear surfaces of the lower - left part of the outer hook rod to limit the position of the belt - detecting fork 5, and detection switches are respectively provided on the front and rear surfaces of the lower - right part of the outer hook rod to detect the belt - detecting fork 5.

[0049] The upper end of the hook body 3 is connected to the lower end of the outer hook rod of the hook rod 2 through a second rotating shaft. A support ear is provided on the left part of the hook body 3, and the support ear is connected to the piston rod of the hook - body driving cylinder 7. The hook - body driving cylinder 7 drives the hook body 3 to rotate around the second rotating shaft to realize the function of hooking the sling.

[0050] A third rotating shaft is arranged at the lower end of the hook rod 2. One end of a crank is fixed in the middle of the third rotating shaft, and the other end of the crank is connected to the piston rod of the belt - dialing - fork driving cylinder 8. The belt - dialing fork 4 is fixed at both ends of the third rotating shaft through fastening screws. The belt - dialing - fork driving cylinder 8 drives the third rotating shaft to rotate, and then makes the belt - dialing fork 4 rotate around the third rotating shaft. The belt - dialing fork 4 is used to dial the sling to be close to the hook body 3.

[0051] The belt detection fork 5 is installed at both ends of the second rotating shaft. Two return springs 9 are respectively sleeved on the second rotating shaft in front of and behind the hook rod 2. One end of the return spring 9 is connected to the hook rod 2, and the other end is press-connected to the upper part of the belt detection fork 5, so that the upper part of the belt detection fork 5 is pressed on the stop block. The belt detection fork 5 is used to detect whether the hook body 3 hooks the sling. When the sling is sleeved on the hook body, the sling presses on the belt detection fork 5, and the belt detection fork 5 rotates around the second rotating shaft to the detection switch provided on the outer hook rod, and at the same time compresses the return spring 9 by a certain amount. When the sling disengages from the hook body, the belt detection fork 5 moves away from the detection switch under the action of the return spring 9 and rotates back to the initial position.

[0052] The working process of the automatic hooking device is as follows:

[0053] (1) Hooking the sling: The hook rod driving cylinder 6 acts, and the hook rod 2 drives the hook body 3 to rotate around the first rotating shaft, so that the hook body 3 approaches the sling; the hook body driving cylinder 7 acts, and the hook body 3 rotates around the second rotating shaft to hook the sling;

[0054] (2) Pushing the belt loop: The belt fork driving cylinder 8 acts, the belt fork 4 rotates around the third rotating shaft, drives the sling to make the belt detection fork 5 rotate by a certain angle, and at the same time the return spring 9 is compressed, and it is confirmed whether the sling is successfully hooked through the detection switch;

[0055] (3) Removing the sling: After the ton bag is filled, the belt fork driving cylinder 8 resets, the hook body driving cylinder 7 acts, the sling is detached from the hook body 3, the belt detection fork 5 resets under the action of the return spring 9, the hook rod driving cylinder 6 resets, and the hook rod 2 drives the hook body 3 back to the initial position, and the unhooking work is completed.

[0056] The present invention has been described in detail above in combination with specific embodiments and exemplary examples, but these descriptions should not be construed as limiting the present invention. Those skilled in the art understand that without departing from the spirit and scope of the present invention, various equivalent replacements, modifications or improvements can be made to the technical solutions and their implementation manners of the present invention, and these all fall within the scope of the present invention. The protection scope of the present invention shall be subject to the appended claims.

[0057] The content not described in detail in the specification of the present invention belongs to the well-known technology of those skilled in the art.

Claims

1. An automatic hooking device for a four-ring flexible bulk bag, characterized in that, It includes a fixing frame (1), a hook rod (2), a hook body (3), a belt detection fork (5) and a return spring (9); The fixing frame (1) is fixedly installed on the ton packaging machine frame; The upper end of the hook rod (2) is connected to the fixing frame (1) through a first rotating shaft, and the lower end is connected to the hook body (3) through a second rotating shaft. The hook rod (2) rotates around the first rotating shaft to drive the hook body (3) to approach or move away from the sling ring, and the hook body (3) rotates around the second rotating shaft to hook or disengage from the sling ring; The belt detection fork (5) is installed on the second rotating shaft. The installation point of the belt detection fork (5) and the second rotating shaft is located between the upper end and the lower end of the belt detection fork (5). Taking the installation point as the boundary, the belt detection fork (5) is divided into an upper section and a lower section; The return spring (9) is sleeved on the second rotating shaft. One end of the return spring (9) is fixedly connected to the upper section of the belt detection fork (5), and the other end is fixedly connected to the hook rod (2); Above the opening side of the hook body (3), there is a detection switch, and there is a stop block above the other side of the hook body (3); When the hook body (3) disengages from the sling ring, the return spring (9) is in a non-compressed state, the upper section of the belt detection fork (5) presses on the stop block, and the lower section of the belt detection fork (5) is located at the opening of the hook body (3). When the hook body (3) hooks the sling ring, the sling ring pushes the lower section of the belt detection fork (5) to make the belt detection fork (5) rotate around the second rotating shaft. At the same time, the return spring (9) is compressed. When the upper section of the belt detection fork (5) presses on the detection switch, the sling ring hanging hook is completed; It also includes a belt fork (4); The belt fork (4) is connected to the lower end of the hook rod (2) through a third rotating shaft; The belt fork (4) is located on one side of the opening of the hook body (3); The rotation of the third rotating shaft drives the belt fork (4) to rotate, so that the sling ring continues to move into the hook body (3) after being hooked by the hook body (3); It also includes a belt fork driving cylinder (8); The tail of the belt fork driving cylinder (8) is fixed on the hook rod (2). The piston rod of the belt fork driving cylinder (8) is connected to the third rotating shaft through a crank. The belt fork (4) is fixedly connected to the third rotating shaft. The belt fork driving cylinder (8) drives the third rotating shaft to rotate through the crank, and the rotation of the third rotating shaft drives the belt fork (4) to rotate; The belt fork (4) is a U-shaped structure with an open upper end. The belt fork (4) is arranged outside the lower section of the belt detection fork (5); Both sides of the upper end of the belt fork (4) are fixedly connected with belt fork mounting plates. There are several mounting holes on the belt fork mounting plates. After the screws are matched with the mounting holes, both sides of the upper end of the belt fork (4) are fixed to both ends of the third rotating shaft. The cooperation of the screws with different mounting holes realizes the adjustment of the height of the belt fork (4) relative to the hook body (3).

2. The automatic hooking device for a four-ring flexible container bag according to claim 1, characterized in that, The hook rod (2) includes an inner hook rod and an outer hook rod that are sleeved with each other. The upper end of the inner hook rod is connected to the fixing frame (1) through a first rotating shaft, and the lower end of the outer hook rod is connected to the hook body (3) through a second rotating shaft. There is a fastening seat on the outer surface of the inner hook rod, and there is an adjusting screw parallel to the hook rod (2) on the outer surface of the outer hook rod. Through the cooperation of the adjusting screw and the fastening seat, the length of the part of the inner hook rod located inside the outer hook rod is adjusted to realize the length adjustment of the hook rod (2).

3. The automatic hooking device for a four-ring flexible bulk bag according to claim 1, characterized in that, The return spring (9) includes a torsion spring and straight connecting ends extending from both ends of the torsion spring; The torsion spring is sleeved on the second rotating shaft, and the connecting ends extending from both ends of the torsion spring are fixedly connected to the upper section of the detection fork belt (5) and the hook rod (2) respectively.

4. The automatic hooking device for a four-lifting-ring flexible bulk bag according to claim 2, characterized in that, It further includes a hook rod driving cylinder (6) and a hook body driving cylinder (7); The tail of the hook rod driving cylinder (6) is fixed on the fixed frame (1), and the piston rod of the hook rod driving cylinder (6) is connected to the hook rod (2), and is used to drive the hook rod (2) to rotate around the first rotating shaft to drive the hook body (3) to approach or move away from the hanging ring; The tail of the hook body driving cylinder (7) is fixed on the outer hook rod of the hook rod (2), and the piston rod of the hook body driving cylinder (7) is connected to the hook body (3), and is used to drive the hook body (3) to rotate around the second rotating shaft to hook or disengage from the hanging ring.

5. The automatic hooking device for a four-loop flexible bulk bag according to claim 2, wherein, The stop block and the detection switch are both fixedly installed on the outer hook rod of the hook rod (2).

6. The automatic hooking device for a four-ring flexible container bag according to claim 1, characterized in that, The detection fork belt (5) is a U-shaped structure with an open upper end. The second rotating shaft passes through the lower end of the hook rod (2) and the upper end of the hook body (3) at the same time. Both sides of the U-shaped detection fork belt (5) are installed at both ends of the second rotating shaft; There are two reset springs (9), which are respectively located between both sides of the U-shaped detection fork belt (5) and the hook rod (2); When the hook body (3) disengages from the hanging ring, the reset spring (9) is in a non-compressed state, the upper section of the detection fork belt (5) presses on the stop block, and the lower section of the detection fork belt (5) is sleeved outside the hook body (3) to block the opening of the hook body (3).

7. An automatic hanging hook method for a four-loop flexible bulk bag, characterized in that, It is realized by using the automatic hooking device described in any one of claims 1-6, and includes the following steps: When the hook body (3) disengages from the hanging ring, the reset spring (9) is in a non-compressed state, the upper section of the detection fork belt (5) presses on the stop block, and the lower section of the detection fork belt (5) is located at the opening of the hook body (3); The hook rod (2) rotates around the first rotating shaft to drive the hook body (3) to approach the hanging ring, and the hook body (3) rotates around the second rotating shaft to hook the hanging ring; When the hook body (3) hooks the hanging ring, the hanging ring pushes the lower section of the detection fork belt (5) to make the detection fork belt (5) rotate around the second rotating shaft, and at the same time the reset spring (9) is compressed. When the upper section of the detection fork belt (5) presses on the detection switch, the hanging ring hooking is completed; When the hook body (3) disengages from the hanging ring, the upper section of the detection fork belt (5) resets under the action of the reset spring (9), and the hook rod (2) and the hook body (3) reset.

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