Ton bag position automatic correction device and correction method

Abstract

The application discloses a ton bag position automatic correction device and a correction method. The automatic correction device comprises a ton bag skew detection mechanism and a ton bag skew correction mechanism. A position sensor for detecting whether the ton bag position is skewed is arranged on the ton bag skew detection mechanism. The ton bag skew correction mechanism comprises a first ton bag deviation rectifier and a second ton bag deviation rectifier arranged on both sides of the ton bag. The first ton bag deviation rectifier comprises a first conveying belt and a first moving mechanism. The second ton bag deviation rectifier comprises a second conveying belt and a second moving mechanism. The fixed frame of the first conveying belt is fixed on the first moving mechanism, and the fixed frame of the second conveying belt is fixed on the second moving mechanism. The conveying surfaces of the first conveying belt and the second conveying belt are vertically arranged relative to the horizontal direction, and the conveying directions of the first conveying belt and the second conveying belt are both arranged along the horizontal direction. The application improves the weighing precision of the full-automatic packaging machine and the consistency of the labels on the ton bag body.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic packaging machines, and in particular to a ton bag position automatic correction device and correction method. Background Art

[0002] A quantitative packaging scale (also known as a ton bag packaging machine) is a packaging device used for quantitative packaging of solid fluid materials (granular or powdered materials). Currently, most quantitative packaging scales on the market use a semi-automatic packaging mode, requiring manual bag removal, opening, and hanging. After the bags are hung on the packaging machine, the packaging machine automatically performs quantitative loading. After loading is complete, the filled ton bag is transferred to a conveyor and then sent to the next station for bag sealing.

[0003] However, these semi-automatic packaging machines present several challenges: During the packaging process, the bags remain open for extended periods after being filled, exposing the raw materials to airborne contamination, potentially reducing their performance. Furthermore, the dust generated during the packaging process can pollute the surrounding environment, making them less environmentally friendly. Furthermore, specialized industries, such as the lithium battery industry, face stringent requirements for precise quantitative packaging due to the high cost of these materials, a requirement that existing packaging machines are unable to meet. Furthermore, the use of semi-automatic packaging machines increases labor costs and reduces packaging efficiency.

[0004] In response to the above problems, our company has developed a fully automatic packaging machine for solid fluids and has applied for several patents. This fully automatic packaging machine can realize fully automatic operations such as bag taking, bag opening, bagging, loading, weighing, heat sealing, and labeling.

[0005] However, the aforementioned fully automatic packaging machine still has the following drawback: during bagging, it cannot guarantee that the orientation of the ton bags is completely consistent after each bagging. This affects both the weighing accuracy and the consistency of the labeling position on the bag. Therefore, it is necessary to improve the technology of the fully automatic packaging machine to address the above-mentioned drawbacks. Summary of the Invention

[0006] To solve the above problems, the present invention proposes an automatic ton bag position correction device and correction method, aiming to improve the weighing accuracy of the fully automatic packaging machine and the consistency of the labels on the ton bag body. The specific technical solution is as follows:

[0007] A ton bag position automatic correction device comprises a ton bag skew detection mechanism and a ton bag skew correction mechanism for correcting the position of a skewed ton bag; wherein the ton bag skew detection mechanism is provided with a position sensor for detecting whether the position of the ton bag is skewed; the ton bag skew correction mechanism comprises a first ton bag corrector and a second ton bag corrector respectively arranged on both sides of the ton bag, the first ton bag corrector comprises a first conveyor belt and a first moving mechanism, the second ton bag corrector comprises a second conveyor belt and a second moving mechanism, and the fixing frame of the first conveyor belt is fixed on the first moving mechanism to achieve contact and distance between the first conveyor belt and the side surface of one side of the ton bag, and the fixing frame of the second conveyor belt is fixed on the second moving mechanism to achieve contact and distance between the second conveyor belt and the side surface of the other side of the ton bag; the conveying surfaces on the first conveyor belt and the second conveyor belt are arranged upright relative to the horizontal direction, and the conveying directions of the first conveyor belt and the second conveyor belt are both arranged in the horizontal direction.

[0008] In the present invention, the ton bag is placed on the weighing and conveying workbench of the baler, and the first conveyor belt and the second conveyor belt are respectively located on both sides of the conveying direction of the weighing and conveying workbench; wherein, a movable connection structure of the first ton bag corrector is provided on one side of the frame of the weighing and conveying workbench, and the movable connection structure of the first ton bag corrector includes a cylinder support and a rotating shaft respectively provided on the frame of the weighing and conveying workbench, a first mounting arm is uprightly provided on the rotating shaft, the first moving mechanism is fixed to the upper end of the first mounting arm, and an operating cylinder for realizing the first mounting arm to be turned from an upright state to a horizontal state is connected between the first mounting arm and the cylinder support through a hinge shaft.

[0009] Preferably, a rotating support is further provided on the frame of the weighing and conveying workbench, and the rotating shaft is provided on the rotating support.

[0010] In the present invention, a fixed connection structure of a second ton bag corrector is provided on the other side of the frame of the weighing and conveying workbench. The fixed connection structure of the second ton bag corrector includes a second mounting arm fixedly provided on the frame of the weighing and conveying workbench, and the second moving mechanism is fixed to the upper end portion of the second mounting arm.

[0011] In the present invention, the ton bag deflection detection mechanism includes a detection seat fixed on a third moving mechanism, a detection rod rotatably arranged on the detection seat, and a pair of position sensors spaced apart on the detection seat for detecting whether the detection rod is deflected; wherein, the detection rod is horizontally arranged and facing one side of the ton bag, and the detection rod realizes contact and distance with respect to the side of the ton bag through the third moving mechanism.

[0012] Preferably, a seat bearing is provided on the detection seat, and the detection rod is rotatably provided on the seat bearing.

[0013] Preferably, the third moving mechanism is fixed to the upper end of the second mounting arm.

[0014] Preferably, the first moving mechanism, the second moving mechanism and the third moving mechanism are all three-axis cylinders; a pair of limit blocks are arranged on the detection seat at intervals, and the limit blocks are opposite to the side surfaces of the detection rod and a distance is set between the limit blocks and the side surfaces of the detection rod.

[0015] Preferably, the position sensor is a proximity switch for detecting whether the detection rod is approaching.

[0016] When the position of the detection rod is not deflected, the detection rod will be detected by a pair of proximity switches at the same time; when the position of the detection rod is deflected, the detection rod can only be detected by one of the pair of proximity switches, so that it can be determined whether the detection rod is deflected and in which direction it is deflected.

[0017] In the present invention, the electric roller of the first conveyor belt, the electric roller of the second conveyor belt, the position sensor, the first moving mechanism, the second moving mechanism and the third moving mechanism are respectively connected to a controller.

[0018] A calibration method for a ton bag position automatic calibration device comprises the following steps:

[0019] (1) Initial position setting of the first mounting arm: the operating cylinder is turned on to rotate the first mounting arm from the vertical state to the horizontal state, and the first ton bag corrector follows the first mounting arm and moves to the lower position on one side of the weighing and conveying workbench, thereby making room for the bag loading mechanism to load the bags;

[0020] (2) Bagging: Open the bagging mechanism on the packaging machine, and use the bagging mechanism to put the bag mouth of the ton bag on the lifting feeding cylinder above the packaging machine main body, and make the bottom of the ton bag sit on the weighing and conveying workbench, and fill the ton bag with a proper amount of gas through the inflation device on the packaging machine main body to make the ton bag bulge;

[0021] (3) Rotation of the first mounting arm: the operating cylinder is activated to rotate the first mounting arm from a horizontal state to a vertical state, and the first ton bag guide is moved along with the first mounting arm to an upper position on one side of the weighing and conveying workbench;

[0022] (4) Ton bag position correction: start the first moving mechanism and the second moving mechanism, so that the first conveyor belt on the first ton bag corrector and the second conveyor belt on the second ton bag corrector respectively move toward the ton bag and contact and lightly press the two sides of the ton bag; at the same time, start the third moving mechanism, so that the detection rod on the ton bag deflection detection mechanism moves toward the ton bag and contacts the ton bag; the controller obtains whether the detection rod is deflected through a pair of position sensors. If the detection rod is deflected, the conveying action of the first conveyor belt and the second conveyor belt is started according to the direction of the deflection. Under the combined action of the light pressure and conveying action of the first conveyor belt and the second conveyor belt on the ton bag, the two sides of the ton bag are clamped by the first conveyor belt and the second conveyor belt and tangentially rubbed along the conveying direction of the conveyor belt, so that the ton bag rotates to a certain angle in the opposite direction of the deflection direction, thereby correcting the position of the ton bag.

[0023] After the position correction of the ton bag is completed, the first moving mechanism, the second moving mechanism and the third moving mechanism are turned on to retreat, so that the first conveyor belt, the second conveyor belt and the detection rod are respectively out of contact with the ton bag, and then the operating cylinder is turned on to move in the opposite direction, so that the first mounting arm is turned from the upright state to the horizontal state, so as to facilitate the subsequent processes of the automatic baling machine.

[0024] The beneficial effects of the present invention are:

[0025] First, the present invention provides an automatic correction device and correction method for the position of ton bags, and a specially designed ton bag corrector. The ton bag position automatic correction is achieved by utilizing the light clamping effect and tangential kneading effect of the first conveyor belt and the second conveyor belt on the ton bag, thereby improving the weighing accuracy of the fully automatic packaging machine and the consistency of the labeling on the ton bag body.

[0026] Second, in the automatic ton bag position correction device and correction method of the present invention, the ton bag skew detection mechanism and the ton bag skew correction mechanism cooperate with each other to ensure the accuracy of the ton bag position correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of a ton bag position automatic correction device of the present invention;

[0028] Figure 2 It will Figure 1 Schematic diagram of the structure of the automatic ton bag position correction device after it rotates to a certain angle;

[0029] Figure 3 yes Figure 1 and Figure 2 Schematic diagram of the structure of the ton bag deflection detection mechanism;

[0030] Figure 4 and Figure 5This is a working principle diagram (top view) of using the first conveyor belt and the second conveyor belt to correct the position of the ton bag.

[0031] In the figure: 1. Cylinder support, 2. Operating cylinder, 3. Rotating support, 4. Rotating axis, 5. First mounting arm, 6. First moving mechanism (three-axis cylinder), 7. First conveyor belt, 8. Second mounting arm, 9. Second moving mechanism (three-axis cylinder), 10. Second conveyor belt, 11. Position sensor (proximity switch), 12. Weighing and conveying workbench, 13. Third moving mechanism (three-axis cylinder), 14. Detection seat, 15. Detection rod, 16. Bearing with seat, 17. Limit block, 18. First ton bag corrector, 19. Second ton bag corrector, 20. Ton bag deflection detection mechanism, 21. Ton bag.

[0032] In the figure: A is the conveying direction of the first conveyor belt, and B is the conveying direction of the first conveyor belt. DETAILED DESCRIPTION

[0033] The following embodiments are further described in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0034] Example 1:

[0035] like Figures 1 to 5 The figure shows an embodiment of an automatic ton bag position correction device of the present invention, comprising a ton bag skew detection mechanism and a ton bag skew correction mechanism for correcting the position of a skewed ton bag 21; wherein the ton bag skew detection mechanism is provided with a position sensor 11 for detecting whether the ton bag position is skewed; the ton bag skew correction mechanism comprises a first ton bag deviation corrector 18 and a second ton bag deviation corrector 19 respectively arranged on both sides of the ton bag 21, the first ton bag deviation corrector 18 comprises a first conveyor belt 7 and a first moving mechanism 6, the second ton bag deviation corrector 19 comprises a second conveyor belt 10 and a second moving mechanism 9, and the fixing frame of the first conveyor belt 7 is fixed on the first moving mechanism 6 to achieve contact and separation of the first conveyor belt 7 relative to one side of the ton bag 21, and the fixing frame of the second conveyor belt 10 is fixed on the second moving mechanism 9 to achieve contact and separation of the second conveyor belt 10 relative to the other side of the ton bag 21; the conveying surfaces on the first conveyor belt 7 and the second conveyor belt 10 are arranged upright relative to the horizontal direction, and the conveying directions of the first conveyor belt 7 and the second conveyor belt 10 are both arranged in the horizontal direction.

[0036] In this embodiment, the ton bag 21 is placed on the weighing and conveying workbench 12 of the baler, and the first conveyor belt 7 and the second conveyor belt 10 are respectively located on both sides of the conveying direction of the weighing and conveying workbench 12; wherein, a movable connection structure of the first ton bag corrector 18 is provided on one side of the frame of the weighing and conveying workbench 12, and the movable connection structure of the first ton bag corrector 18 includes a cylinder support 1 and a rotating shaft 4 respectively arranged on the frame of the weighing and conveying workbench 12, and a first mounting arm 5 is uprightly provided on the rotating shaft 4, and the first moving mechanism 6 is fixed to the upper end of the first mounting arm 5, and an operating cylinder 2 for realizing the first mounting arm 5 to be turned from an upright state to a horizontal state is connected between the first mounting arm 5 and the cylinder support 1 through a hinge shaft.

[0037] Preferably, a rotating support 3 is further provided on the frame of the weighing and conveying workbench 12 , and the rotating shaft 4 is provided on the rotating support 3 .

[0038] In this embodiment, a fixed connection structure of a second ton bag corrector 19 is provided on the other side of the frame of the weighing and conveying workbench 12. The fixed connection structure of the second ton bag corrector 19 includes a second mounting arm 8 fixedly provided on the frame of the weighing and conveying workbench 12, and the second moving mechanism 9 is fixed to the upper end portion of the second mounting arm 8.

[0039] In this embodiment, the ton bag deflection detection mechanism includes a detection seat 14 fixed on the third moving mechanism 13, a detection rod 15 rotatably set on the detection seat 14, and a pair of position sensors 11 spaced apart on the detection seat 14 for detecting whether the detection rod 15 is deflected; wherein, the detection rod 15 is horizontally arranged and facing one side surface of the ton bag 21, and the detection rod 15 realizes the contact and distance of the detection rod 15 relative to the side surface of the ton bag 21 through the third moving mechanism 13.

[0040] Preferably, a seat bearing 16 is provided on the detection seat 14 , and the detection rod 15 is rotatably provided on the seat bearing 16 .

[0041] Preferably, the third moving mechanism 13 is fixed to the upper end of the second mounting arm 8 .

[0042] Preferably, the first moving mechanism 6, the second moving mechanism 9 and the third moving mechanism 13 are all three-axis cylinders; a pair of limit blocks 17 are arranged on the detection seat 14 at intervals, and the limit blocks 17 are opposite to the side of the detection rod 15 and a distance is set between them and the side of the detection rod 15.

[0043] Preferably, the position sensor 11 is a proximity switch for detecting whether the detection rod 15 is approaching.

[0044] When the position of the detection rod 15 is not deflected, the detection rod 15 will be detected by a pair of proximity switches at the same time; when the position of the detection rod 15 is deflected, the detection rod 15 can only be detected by one of the pair of proximity switches, so that it can be determined whether the detection rod 15 is deflected and in which direction it is deflected.

[0045] In this embodiment, the electric roller of the first conveyor belt 7, the electric roller of the second conveyor belt 10, the position sensor 11, the first moving mechanism 6, the second moving mechanism 9 and the third moving mechanism 13 are respectively connected to the controller.

[0046] Example 2:

[0047] A calibration method for the automatic calibration device for the ton bag position of the packaging machine of the sampling embodiment 1 comprises the following steps:

[0048] (1) Initial position setting of the first mounting arm: the operating cylinder 2 is turned on to rotate the first mounting arm 5 from the upright state to the horizontal state, and the first ton bag corrector 18 follows the first mounting arm 5 and moves to the lower position on one side of the weighing and conveying workbench 12, thereby making room for the bag loading mechanism to load the bags;

[0049] (2) Bagging: The bagging mechanism on the packaging machine is opened, and the bagging mechanism sets the bag opening of the ton bag 21 on the lifting feeding cylinder above the packaging machine main body, and makes the bottom of the ton bag sit on the weighing and conveying workbench 12. The inflation device on the packaging machine main body is used to fill the ton bag 21 with an appropriate amount of gas to make the ton bag 21 bulge;

[0050] (3) Rotation of the first mounting arm: The operating cylinder 2 is turned on to rotate the first mounting arm 5 from a horizontal state to an upright state, and the first ton bag corrector 18 follows the first mounting arm 5 and moves to the upper position on one side of the weighing and conveying workbench 12;

[0051] (4) Ton bag position correction: the first moving mechanism 6 and the second moving mechanism 9 are turned on, so that the first conveyor belt 7 on the first ton bag corrector 18 and the second conveyor belt 10 on the second ton bag corrector 19 move toward the ton bag 21 respectively and contact and lightly press the two sides of the ton bag 21; at the same time, the third moving mechanism 13 is turned on, so that the detection rod 15 on the ton bag deflection detection mechanism moves toward the ton bag 21 and contacts the ton bag 21; the controller obtains whether the detection rod 15 is deflected through a pair of position sensors 11. If the detection rod 15 is deflected, the conveying action of the first conveyor belt 7 and the second conveyor belt 10 is turned on according to the direction of the deflection. Under the combined action of the light pressure and conveying action of the first conveyor belt 7 and the second conveyor belt 10 on the ton bag 21, the two sides of the ton bag 21 are clamped by the first conveyor belt 7 and the second conveyor belt 10 and tangentially rubbed along the conveying direction of the conveyor belt, so that the ton bag 21 rotates to a certain angle in the opposite direction of the deflection direction, thereby correcting the position of the ton bag 21.

[0052] After the position correction of the ton bag 21 is completed, the first moving mechanism, the second moving mechanism and the third moving mechanism are turned on and retreated, so that the first conveyor belt 7, the second conveyor belt 10 and the detection rod 15 are respectively out of contact with the ton bag 21, and then the operating cylinder 2 is turned on to move in the reverse direction, so that the first mounting arm 5 is turned from the upright state to the horizontal state, so as to facilitate the subsequent processes of the automatic baling machine.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A device for automatically correcting the position of a ton bag, characterized in that: It includes a ton bag deflection detection mechanism and a ton bag deflection correction mechanism for correcting the position of the deflected ton bag; wherein the ton bag deflection detection mechanism is provided with a position sensor for detecting whether the position of the ton bag is deflected; the ton bag deflection correction mechanism includes a first ton bag corrector and a second ton bag corrector respectively arranged on both sides of the ton bag, the first ton bag corrector includes a first conveyor belt and a first moving mechanism, the second ton bag corrector includes a second conveyor belt and a second moving mechanism, and the fixing frame of the first conveyor belt is fixed on the first moving mechanism to achieve contact and separation of the first conveyor belt with respect to one side of the ton bag, and the fixing frame of the second conveyor belt is fixed on the second moving mechanism to achieve contact and separation of the second conveyor belt with respect to the other side of the ton bag; the conveying surfaces on the first conveyor belt and the second conveyor belt are arranged upright relative to the horizontal direction, and the conveying directions of the first conveyor belt and the second conveyor belt are both arranged in the horizontal direction; The ton bag is placed on the weighing and conveying workbench of the baler, and the first conveyor belt and the second conveyor belt are respectively located on both sides of the conveying direction of the weighing and conveying workbench; wherein, a movable connection structure of a first ton bag corrector is provided on one side of the frame of the weighing and conveying workbench, and the movable connection structure of the first ton bag corrector includes a cylinder support and a rotating shaft respectively provided on the frame of the weighing and conveying workbench, a first mounting arm is erected upward on the rotating shaft, the first moving mechanism is fixed to the upper end of the first mounting arm, and an operating cylinder for realizing the first mounting arm to be turned from an upright state to a horizontal state is connected between the first mounting arm and the cylinder support via a hinge shaft; The ton bag deflection detection mechanism includes a detection seat fixed on a third moving mechanism, a detection rod rotatably arranged on the detection seat, and a pair of position sensors spaced apart on the detection seat for detecting whether the detection rod is deflected; wherein, the detection rod is horizontally arranged and facing one side of the ton bag, and the detection rod is realized by the third moving mechanism to make contact with and move away from the side of the ton bag.

2. The automatic position correction device for ton bags according to claim 1 is characterized in that: A fixed connection structure of a second ton bag corrector is provided on the other side of the frame of the weighing and conveying workbench. The fixed connection structure of the second ton bag corrector includes a second mounting arm fixedly provided on the frame of the weighing and conveying workbench, and the second moving mechanism is fixed to the upper end portion of the second mounting arm.

3. The automatic position correction device for ton bags according to claim 1 is characterized in that: A seat bearing is provided on the detection seat, and the detection rod is rotatably provided on the seat bearing.

4. The automatic position correction device for ton bags according to claim 2 is characterized in that: The third moving mechanism is fixed to the upper end of the second mounting arm.

5. The automatic position correction device for ton bags according to claim 1 is characterized in that: The first moving mechanism, the second moving mechanism and the third moving mechanism are all three-axis cylinders; a pair of limit blocks are arranged on the detection seat at intervals, and the limit blocks are opposite to the side surfaces of the detection rod and a distance is set between the limit blocks and the side surfaces of the detection rod.

6. The automatic position correction device for ton bags according to claim 1 is characterized in that: The position sensor is a proximity switch for detecting whether the detection rod is approaching.

7. The automatic position correction device for ton bags according to claim 1 is characterized in that: The electric roller of the first conveyor belt, the electric roller of the second conveyor belt, the position sensor, the first moving mechanism, the second moving mechanism and the third moving mechanism are respectively connected to the controller.

8. A correction method using the automatic position correction device for ton bags according to any one of claims 1 to 7, characterized in that: The steps include: (1) Initial position setting of the first mounting arm: Start the operating cylinder to rotate the first mounting arm from the vertical state to the horizontal state, and the first ton bag corrector follows the first mounting arm to the lower position on one side of the weighing and conveying workbench, thereby making room for the bag loading mechanism to load the bag; (2) Bagging: Open the bagging mechanism on the packaging machine, and use the bagging mechanism to put the bag mouth of the ton bag on the lifting feeding cylinder above the packaging machine main machine, and make the bottom of the ton bag sit on the weighing and conveying workbench, and fill the ton bag with a proper amount of gas through the inflation device on the packaging machine main machine to make the ton bag bulge; (3) Rotation of the first mounting arm: Start the operating cylinder to rotate the first mounting arm from a horizontal state to a vertical state, and the first ton bag guide device follows the first mounting arm to the upper position on one side of the weighing and conveying workbench; (4) Ton bag position correction: start the first moving mechanism and the second moving mechanism, so that the first conveyor belt on the first ton bag corrector and the second conveyor belt on the second ton bag corrector move toward the ton bag and contact and lightly press the two sides of the ton bag respectively; at the same time, start the third moving mechanism, so that the detection rod on the ton bag deflection detection mechanism moves toward the ton bag and contacts the ton bag; the controller obtains whether the detection rod is deflected through a pair of position sensors. If the detection rod is deflected, the conveying action of the first conveyor belt and the second conveyor belt is started according to the direction of the deflection. Under the combined action of the light pressure and conveying action of the first conveyor belt and the second conveyor belt on the ton bag, the two sides of the ton bag are clamped by the first conveyor belt and the second conveyor belt and tangentially rubbed along the conveying direction of the conveyor belt, so that the ton bag rotates to a certain angle in the opposite direction of the deflection direction, thereby correcting the position of the ton bag.

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