Packaging box palletizing device and method

Abstract

The invention discloses a packaging box stacking device and method, and relates to the technical field of packaging box production. The stacking device comprises a frame, a longitudinal drive unit is provided on the top of the frame, a transverse drive unit is provided on the longitudinal drive unit, a vertical drive unit is provided on the transverse drive unit, a conveying frame is provided on one side of the frame, a roller conveying mechanism is provided on the conveying frame, a height detection unit and a width detection unit are provided on the top of the conveying frame, a material blocking unit is provided at the end of the conveying frame, a two-way cylinder is provided at the bottom end of the vertical drive unit, and clamping plates are provided at the telescopic ends on both sides of the two-way cylinder. The invention detects the height and width of the packaging box, adaptively adjusts the clamping part according to the detection result, and actively corrects the packaging box when it deviates to avoid affecting normal stacking. In addition, during the stacking process, the packaging box can be effectively prevented from falling off to cause damage to the box body and the product.

Description

Technical Field

[0001] The invention relates to the technical field of packaging box production, and in particular to a packaging box palletizing device and method. Background Art

[0002] As an important component of the product, the packaging box plays an important role in protecting the product, promoting sales, and improving the grade. Packaging box palletizing is an important link in the packaging production process, which mainly involves stacking the packaged products according to certain rules and sequence for subsequent storage, transportation and sales.

[0003] A Chinese patent with publication number CN109720884A discloses an automatic palletizing device for packaging boxes, which includes a supporting part, a sliding device, a rotating lifting device and a clamping device; the supporting part includes a roller line, a supporting frame, a transfer frame, a sliding seat and a sliding plate; the roller line is arranged directly below the supporting frame and connected to the previous process, a transfer frame is provided at the end of the roller line, a transfer bracket is provided on the side of the transfer frame, the top crossbeam of the supporting frame supports the sliding seat with the sliding device installed, the crossbeam of the sliding seat supports the sliding plate, the rotating lifting device is installed on the sliding plate, and the clamping device is installed at the end of the rotating lifting device. However, during use, the clamping part cannot be adaptively adjusted according to the width and height of the packaging box, resulting in low palletizing efficiency.

[0004] Moreover, during the transportation of the packaging box, the uneven distribution of the product weight in the packaging box can easily cause the packaging box to shift, thereby affecting the normal clamping of the packaging box by the clamping part. In addition, after long-term use, the contact surface between the clamping part and the packaging box will gradually become smooth, resulting in a decrease in the friction between the clamping part and the packaging box, which in turn causes the packaging box to fall off during the clamping process, causing damage to the packaging box and the product inside. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a packaging box palletizing device and method. By detecting the height and width of the packaging box, the clamping part is adaptively adjusted according to the detection result, and active correction is performed when the packaging box is offset to avoid affecting normal palletizing. In addition, during the palletizing process, the packaging box can be effectively prevented from falling off and causing damage to the box body and the product, which can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a packaging box stacking device comprises a frame, a longitudinal driving unit is provided on the top of the frame, a transverse driving unit is provided on the longitudinal driving unit, a vertical driving unit is provided on the transverse driving unit, a conveying frame is provided on one side of the frame, a roller conveying mechanism is provided on the conveying frame, a height detection unit and a width detection unit are provided on the top of the conveying frame, a material blocking unit is provided on the end of the conveying frame, a two-way cylinder is provided on the bottom end of the vertical driving unit, a clamping plate is provided on the telescopic ends on both sides of the two-way cylinder, a slide groove is provided through the side surface of the clamping plate, a slider is slidably connected in the slide groove, an electromagnet is provided on the top of the slide groove, a limit spring is provided between the top of the slider and the top surface of the slide groove, a tension sensor is provided between the end of the limit spring and the top of the slider, a ball capsule is provided on the side surface of the slider, a guide hole connected to the ball capsule is provided on the top of the slider, and a piston rod is slidably matched in the guide hole;

[0007] The width detection unit includes two symmetrically arranged support plates, which are respectively arranged on both sides of the conveying frame. Electric push rods are arranged on the sides of the support plates, and mounting plates are arranged on the relative telescopic ends of the electric push rods on both sides. A second ranging sensor is arranged on the inner side of the mounting plate.

[0008] Furthermore, the longitudinal drive unit includes two symmetrically arranged longitudinal slide rails, which are respectively arranged at the top two ends of the frame, and a longitudinal slide seat is slidably connected to the longitudinal slide rails. One end of the side of the frame is rotatably connected to a secondary pulley through a support.

[0009] Furthermore, a first drive motor is provided at the other end of the side of the frame through a machine base, a main pulley is provided on the output shaft of the first drive motor, the main pulley and the secondary pulley are connected by a longitudinal transmission belt, and the longitudinal transmission belt is fixedly connected to the longitudinal slide.

[0010] Furthermore, the transverse driving unit comprises a transverse slide rail, two ends of which are respectively arranged on the top of the longitudinal slide seats on both sides, and the transverse slide rail is slidably connected to the transverse slide seat.

[0011] Furthermore, one end of the transverse slide rail is rotatably connected to a fixed pulley via a fixed seat, and the other end of the transverse slide rail is provided with a second drive motor via a mounting seat. A movable pulley is provided on the output shaft of the second drive motor, and the movable pulley and the fixed pulley are connected via a transverse transmission belt, and the transverse transmission belt is fixedly connected to the transverse slide seat.

[0012] Furthermore, the vertical drive unit includes a vertical slide, which is slidably connected to the side of the transverse slide, and the bottom end of the vertical slide is fixedly connected to the bidirectional cylinder. A rack is provided on the side of the vertical slide, and a lifting motor is provided on the inner side of the transverse slide. The output shaft of the lifting motor passes through the side of the transverse slide and is provided with a gear meshing with the rack.

[0013] Furthermore, the slider is made of magnetic material, the side surface of the slider is coplanar with the side surface of the clamping plate, and the balloon is made of rubber material.

[0014] Furthermore, the height detection unit includes a bracket, the bracket is arranged on the top surface of the conveying rack, and a first distance measuring sensor is arranged on the top of the bracket through a cross bar.

[0015] Furthermore, the material blocking unit includes a support rod, the support rod is arranged at the end of the conveying frame, a fixing rod is arranged on the top of the support rod, a baffle is arranged at the end of the fixing rod, and pressure sensors are symmetrically arranged on both sides of the baffle.

[0016] The present invention also provides a palletizing method of the packaging box palletizing device as described above, comprising the following steps:

[0017] S1, placing the packaging box on the roller conveying mechanism and conveying it to the bottom of the frame, and corresponding to the position between the clamping plates on both sides, at which time the end of the packaging box contacts the material blocking unit;

[0018] S2, during the conveying process, the height and width of the packaging box are detected by the height detection unit and the width detection unit respectively, and the distance between the clamping plates on both sides and the falling height are adjusted according to the measured height and width;

[0019] S3, using the vertical drive unit to move the clamping plates on both sides downward so that the two clamping plates are located on both sides of the packaging box respectively, and using the contraction of the bidirectional cylinder to drive the clamping plates on both sides to close and clamp the packaging box;

[0020] S4. After clamping is completed, the vertical drive unit is used to lift the packaging box, and the longitudinal drive unit and the transverse drive unit are used to move the packaging box to the corresponding position above the pallet located on the bottom side of the frame. Finally, the vertical drive unit is used to place the packaging box on the pallet and then the clamping plate is released to complete the stacking of the packaging box.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. After the packaging box is conveyed to the preset position, when the packaging box is horizontally offset, the electric push rod corresponding to the side with the smaller distance value is used to push the packaging box to move toward the middle of the roller conveying mechanism to correct the position of the packaging box.

[0023] 2. When the packaging box is skewed, the present invention starts the electric push rods on both sides to extend in opposite directions at the same time, so that the mounting plates on both sides move in opposite directions and close together, thereby straightening the skewed packaging box, making the distance values ​​on both sides of the packaging box fall within the normal threshold range, and then using the roller transmission mechanism to make the packaging box contact with the pressure sensor, and the pressure values ​​on both sides fall within the normal threshold range, thereby achieving the straightening of the packaging box.

[0024] 3. When the packaging box is clamped from the roller conveyor mechanism, the packaging box slides downward to stop the transportation of the packaging box. At the same time, the electromagnet is used to attract the slider to move upward to increase the downward sliding resistance of the packaging box. When the packaging box continues to slide downward, the electric push rods on both sides are used to make the mounting plates on both sides auxiliary clamp and fix the bottom of the packaging box to prevent the packaging box from falling off.

[0025] 4. When the packaging box of the present invention is about to fall downward after being away from the clamping plate, the electromagnet is first used to attract the slider to move upward. When the packaging box continues to slide downward, the magnetic attraction of the electromagnet is further increased, the slider continues to move upward, the piston rod slides into the guide hole, and the balloon is inflated to increase the clamping force of the clamping plate on the packaging box and the friction between the slider and the packaging box, so as to prevent the packaging box from continuing to slide downward, thereby protecting the packaging box and the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the top structure of the present invention;

[0028] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0029] Figure 4 It is a structural schematic diagram of another angle of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the height detection unit of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the material blocking unit of the present invention.

[0032] In the figure: 1, frame; 2, longitudinal drive unit; 201, longitudinal slide rail; 202, longitudinal slide seat; 203, secondary pulley; 204, first drive motor; 205, main pulley; 206, longitudinal transmission belt; 3, transverse drive unit; 301, transverse slide rail; 302, transverse slide seat; 303, fixed pulley; 304, second drive motor; 305, driving pulley; 306, transverse transmission belt; 4, vertical drive unit; 401, vertical slide seat; 402, rack; 403, lifting motor; 404, gear; 405, two-way air Cylinder; 406, clamping plate; 407, slide groove; 408, slider; 409, electromagnet; 410, limit spring; 411, balloon; 412, piston rod; 5, conveying rack; 501, roller conveying mechanism; 6, height detection unit; 601, bracket; 602, first distance measuring sensor; 7, width detection unit; 701, support plate; 702, electric push rod; 703, mounting plate; 704, second distance measuring sensor; 8, material blocking unit; 801, support rod; 802, fixing rod; 803, baffle; 804, pressure sensor. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1

[0035] See also Figure 1-6 The present embodiment provides a packaging box stacking device, including a frame 1. A longitudinal driving unit 2 is provided on the top of the frame 1, and the longitudinal driving unit 2 is used to drive the clamping plate 406 to move along the width direction of the frame 1. A transverse driving unit 3 is provided on the longitudinal driving unit 2, and the transverse driving unit 3 is used to drive the clamping plate 406 to move along the length direction of the frame 1. A vertical driving unit 4 is provided on the transverse driving unit 3, and the vertical driving unit 4 is used to drive the clamping plate 406 to move along the vertical direction of the frame 1.

[0036] A conveying frame 5 is provided on one side of the frame 1, and a roller conveying mechanism 501 is provided on the conveying frame 5. The roller conveying mechanism 501 adopts a conventional roller conveying structure in the prior art, which will not be elaborated here. A height detection unit 6 and a width detection unit 7 are provided on the top of the conveying frame 5. The height detection unit 6 and the width detection unit 7 respectively detect the height and width of the passing packaging box, so as to adaptively adjust the distance between the clamping plates 406 on both sides and the falling height of the clamping plates 406 through an external control terminal according to the detection results. A material blocking unit 8 is provided at the end of the conveying frame 5, and the material blocking unit 8 is used to block the packaging box to prevent the packaging box from falling.

[0037] The longitudinal drive unit 2 includes two symmetrically arranged longitudinal slide rails 201, and the two longitudinal slide rails 201 are respectively arranged at the two ends of the top of the frame 1. A longitudinal slide seat 202 is slidably connected to the longitudinal slide rail 201. One end of the side of the frame 1 is rotatably connected to a secondary pulley 203 through a support. The other end of the side of the frame 1 is provided with a first driving motor 204 through a machine base. A main pulley 205 is provided on the output shaft of the first driving motor 204. The main pulley 205 and the secondary pulley 203 are connected for transmission through a longitudinal transmission belt 206. The longitudinal transmission belt 206 is fixedly connected to the longitudinal slide seat 202. The first driving motor 204 is used to rotate and drive the main pulley 205 to rotate. The main pulley 205 drives the secondary pulley 203 to rotate through the longitudinal transmission belt 206 to realize the operation of the longitudinal transmission belt 206. The longitudinal transmission belt 206 drives the longitudinal slide seat 202 to slide along the longitudinal slide rail 201, thereby realizing the longitudinal sliding of the transverse drive unit 3.

[0038] The transverse drive unit 3 includes a transverse slide rail 301, two ends of which are respectively arranged at the top of the longitudinal slide seats 202 on both sides, the transverse slide rail 301 is slidably connected with the transverse slide seat 302, one end of the transverse slide rail 301 is rotatably connected with a fixed pulley 303 through a fixed seat, and the other end of the transverse slide rail 301 is provided with a second drive motor 304 through a mounting seat, and a driven pulley 305 is provided on the output shaft of the second drive motor 304, and the driven pulley 305 and the fixed pulley 303 are connected for transmission through a transverse transmission belt 306, and the transverse transmission belt 306 is fixedly connected to the transverse slide seat 302, and the rotation of the second drive motor 304 drives the driven pulley 305 to rotate, and the driven pulley 305 drives the fixed pulley 303 to rotate through the transverse transmission belt 306, thereby realizing the operation of the transverse transmission belt 306, and the transverse transmission belt 306 drives the transverse slide seat 302 to slide along the transverse slide rail 301, thereby realizing the transverse movement of the vertical drive unit 4.

[0039] The vertical drive unit 4 includes a vertical slide 401, which is slidably connected to the side of the transverse slide 302. The bottom end of the vertical slide 401 is fixedly connected to the two-way cylinder 405. A rack 402 is provided on the side of the vertical slide 401, and a lifting motor 403 is provided on the inner side of the transverse slide 302. The output shaft of the lifting motor 403 passes through the side of the transverse slide 302 and is provided with a gear 404 meshing with the rack 402. The vertical drive unit 4 utilizes the rotation of the lifting motor 403 to drive the gear 404 to rotate, and the gear 404 drives the rack 402 and the vertical slide 401 to move up and down, thereby realizing the up and down movement of the clamping plate 406.

[0040] A two-way cylinder 405 is provided at the bottom end of the vertical drive unit 4, and clamping plates 406 are provided at the telescopic ends on both sides of the two-way cylinder 405. The telescopic ends at both ends of the two-way cylinder 405 realize the synchronous closing and separation of the clamping plates 406 on both sides through synchronous contraction and synchronous extension, and the clamping plates 406 on both sides in the initial state correspond to the preset positions of the packaging boxes on the roller conveying mechanism 501.

[0041] The height detection unit 6 includes a bracket 601, which is arranged on the top surface of the conveying frame 5. A first distance measuring sensor 602 is arranged on the top of the bracket 601 through a cross bar. The first distance measuring sensor 602 determines the height of the packaging box by detecting the distance between itself and the top of the packaging box.

[0042] The width detection unit 7 includes two symmetrically arranged support plates 701, and the two support plates 701 are respectively arranged on both sides of the conveying frame 5. An electric push rod 702 is arranged on the side of the support plate 701, and the relative telescopic ends of the electric push rods 702 on both sides are provided with mounting plates 703. The inner side of the mounting plate 703 is provided with a second distance measuring sensor 704. The second distance measuring sensors 704 on both sides indirectly detect the width of the packaging box by detecting the distance between themselves and the side of the packaging box.

[0043] The material blocking unit 8 includes a support rod 801, which is arranged at the end of the conveying frame 5. A fixing rod 802 is arranged on the top of the support rod 801, and a baffle 803 is arranged at the end of the fixing rod 802. The baffle 803 is used to block the packaging box to prevent the packaging box from falling.

[0044] Pressure sensors 804 are symmetrically arranged on both sides of the baffle 803. The pressure sensors 804 on both sides of the baffle 803 respectively detect the pressure values ​​from both sides of the end surface of the packaging box to determine whether the packaging box reaches the preset position.

[0045] When in use, the packaging box is placed on the roller conveyor mechanism 501 and then conveyed into the frame 1. After the end face of the packaging box hits the pressure sensors 804 on both sides of the baffle 803, the pressure sensors 804 on both sides simultaneously detect normal pressure value signals within the threshold range, and it is actively determined that the packaging box has reached the preset position. At this time, the operation of the roller conveyor mechanism 501 is stopped. At this time, the packaging box is located between the clamping plates 406 on both sides. The lifting motor 403 is started, and the vertical slide 401 is driven to move downward through the engagement of the gear 404 and the rack 402, so that the two clamping plates 406 are respectively located on both sides of the packaging box. The two-way cylinder 405 is started to close the clamping plates 406 on both sides to clamp the packaging box, and then the lifting motor 403 is used to rotate in the opposite direction to move the packaging box upward. Secondly, the lifting motor 403 is started at the same time. The first drive motor 204 and the second drive motor 304, by driving the first drive motor 204, the main pulley 205 drives the secondary pulley 203 to move and drives the longitudinal transmission belt 206 to operate, and the longitudinal transmission belt 206 drives the longitudinal slide 202 to move longitudinally, and the second drive motor 304 drives the driven pulley 305 to rotate to realize the operation of the driven pulley 305 and the transverse transmission belt 306, and the transverse transmission belt 306 drives the transverse slide 302 to operate transversely, and the vertical slide 401 is driven to move the packaging box to above the preset stacking position, and then the lifting motor 403 is used to drive the vertical slide 401 to move downward to place the packaging box at the preset position, and the telescopic ends on both sides of the two-way cylinder 405 are extended to release the packaging box at the specified position, and then the clamping plate 406 is reset to the initial position.

[0046] The roller conveying mechanism 501 is started again to convey the next packaging box to the preset position, and the longitudinal driving unit 2, the transverse driving unit 3 and the vertical driving unit 4 are used again to place the next packaging box at the designated position to achieve the stacking of the packaging boxes.

[0047] However, during the conveying process of the packaging box on the roller conveying mechanism 501, due to the uneven weight distribution inside the packaging box, the packaging box may be horizontally offset or skewed, thereby affecting the normal clamping of the clamping plate 406. In order to solve the above problem:

[0048] On the one hand, when the packaging box is conveyed to the point where it collides with the side of the baffle 803 and the clamping plate 406 has not reached the preset clamping position, the second distance measuring sensors 704 on both sides detect that the distance values ​​on both sides are different, but the pressure values ​​detected by the pressure sensors 804 on both sides are still within the normal threshold range, it is actively determined that the packaging box has a horizontal deviation, that is, the central axis of the packaging box deviates from the central axis of the roller conveyor mechanism 501, and the deviation direction of the packaging box is toward the side with a smaller distance value. At this time, the electric push rod 702 corresponding to the side with a smaller distance value is started, so that the electric push rod 702 on this side drives the mounting plate 703 on this side to extend, that is, pushes the packaging box to move toward the middle of the roller conveyor mechanism 501. When the second distance measuring sensor 704 on the other side detects that the packaging box is within the set threshold range, the position of the packaging box is corrected, and the electric push rod 702 is quickly reset after the correction is completed.

[0049] On the other hand, before the packaging box is conveyed to the point where it collides with the side of the baffle 803 and the clamping plate 406 has not reached the preset clamping position, when the second distance measuring sensors 704 on both sides detect that the distance values ​​on both sides are different, and when the pressure sensor 804 on one side does not detect a pressure value, it is actively determined that the packaging box is skewed, that is, the central axis of the packaging box and the central axis of the roller conveying mechanism 501 have an angle, and at this time, the electric push rods 702 on both sides are simultaneously started to extend in opposite directions, so that the mounting plates 703 on both sides move in opposite directions and close together, so as to straighten the skewed packaging box, and according to the measurement value of the second distance measuring sensors 704 on both sides, the packaging box is straightened. The distance value obtained is used to adjust the extension of the electric push rod 702 to prevent the packaging box from being damaged by excessive squeezing. The electric push rod 702 then drives the mounting plate 703 to reset. When the distance values ​​measured by the second distance measuring sensors 704 on both sides are within the set threshold range, the central axis of the packaging box coincides with the central axis of the roller conveyor mechanism 501. The roller conveyor mechanism 501 is then started to make the end faces of the packaging box contact the pressure sensors 804 on both sides. When the pressure values ​​measured by the pressure sensors 804 on both sides are within the normal threshold range, it is determined that the packaging box has been straightened and is in the preset position.

[0050] In addition, after the clamping plate 406 is used for a long time, the roughness of the inner clamping surface of the clamping plate 406 gradually decreases and becomes smooth, and the friction between the clamping plate 406 and the packaging box gradually decreases. When the weight of the packaging box or the product inside it increases, the packaging box is easy to fall off, resulting in damage to the packaging box and the product inside. Therefore, the following improvements are made:

[0051] A slide groove 407 is provided on the side of the clamping plate 406, and a slider 408 is slidably connected in the slide groove 407. The slider 408 is made of magnetic material. The inner side surface of the slider 408 is coplanar with the inner side surface of the clamping plate 406, and the inner side surface of the slider 408 is a frosted surface to increase friction resistance. An electromagnet 409 is provided on the top of the slide groove 407, a limit spring 410 is provided between the top of the slider 408 and the top surface of the slide groove 407, and a tension sensor is provided between the end of the limit spring 410 and the top of the slider 408. When the electromagnet 409 is energized, it generates magnetism to attract the slider 408 made of magnetic material to move upward. A balloon 411 is provided on the side of the slider 408, and the balloon 411 is made of rubber. A guide hole connected to the balloon 411 is provided on the top of the slider 408, and a piston rod 412 is slidably fitted in the guide hole. In the initial state, the top of the piston rod 412 does not conflict with the top surface of the slide groove 407.

[0052] When in use, when the clamping plates 406 on both sides clamp the packaging box from the roller conveyor mechanism 501 and the packaging box is still located between the mounting plates 703 on both sides, when the packaging box slides downward, it will drive the slider 408 to move downward. At this time, the limit spring 410 is stretched, and the tension sensor is subjected to increased force. When the tension value detected by the tension sensor is greater than the set threshold, it is actively determined that the packaging box is sliding downward. At this time, the transportation of the packaging box is stopped, and the electromagnet 409 is started at the same time. The magnetic attraction of the electromagnet 409 on the slider 408 is used to attract the slider 408 to move upward. Since the inner side of the slider 408 is in contact with the packaging box, the upward movement of the slider 408 is used to increase the downward sliding resistance of the packaging box to prevent the packaging box from sliding off. When the tension sensor detects that the tension value continues to increase, it means that the packaging box is still continuing to slide downward. At this time, the electric push rods 702 on both sides are quickly started to close the mounting plates 703 on both sides to assist in clamping and fixing the packaging box to prevent the packaging box from continuing to slide down and falling off.

[0053] It should be noted that the clamping plate 406 is clamped on the top of the packaging box. To prevent the packaging box from falling off, after the packaging box is lifted, the bottom of the packaging box corresponds to the mounting plate 703. At this time, the clamping positions of the mounting plates 703 on both sides are at the bottom of the packaging box. Therefore, the clamping plate 406 and the mounting plate 703 do not interfere with each other.

[0054] Furthermore, during the transportation of the packaging box and after it is away from the mounting plate 703, if the packaging box falls downward, the electromagnet 409 is started, and the magnetic attraction of the electromagnet 409 on the slider 408 is used to attract the slider 408 to move upward. At this time, when the tension sensor detects that the tension value continues to increase, that is, the packaging box continues to slide downward, the magnetic attraction of the electromagnet 409 on the slider 408 is increased, so that the slider 408 continues to move upward, and at the same time drives the piston rod 412 to move upward. After the top end of the piston rod 412 hits the top surface of the slide groove 407, the slider 408 moves upward so that the piston rod 412 moves toward the inside of the guide hole. At the same time, the gas in the guide hole is discharged into the balloon 411 to expand the balloon 411. The pressure of the expanded balloon 411 on the packaging box is used to further increase the clamping force of the clamping plate 406 on the packaging box, and at the same time, the friction between the slider 408 and the side of the packaging box is increased, so as to prevent the packaging box from continuing to slide downward and protect the packaging box and the products inside.

[0055] Embodiment 2

[0056] This embodiment provides a palletizing method of a packaging box palletizing device as in Embodiment 1, comprising the following steps:

[0057] S1, placing the packaging box on the roller conveyor mechanism 501 and conveying it to the bottom of the frame 1, and corresponding to the position between the clamping plates 406 on both sides, at which time the end of the packaging box contacts the material blocking unit 8;

[0058] S2, during the conveying process, the height and width of the packaging box are detected by the height detection unit 6 and the width detection unit 7 respectively, and the distance between the clamping plates 406 on both sides and the falling height are adjusted according to the measured height and width;

[0059] S3, using the vertical drive unit 4 to move the clamping plates 406 on both sides downward, so that the two clamping plates 406 are respectively located on both sides of the packaging box, and using the contraction of the bidirectional cylinder 405 to drive the clamping plates 406 on both sides to close and clamp the packaging box;

[0060] S4. After clamping is completed, the vertical drive unit 4 is used to lift the packaging box, and the longitudinal drive unit 2 and the transverse drive unit 3 are used to move the packaging box to the corresponding position above the tray located on the bottom side of the frame 1. Finally, the vertical drive unit 4 is used to place the packaging box on the tray and then the clamping plate 406 is released to complete the stacking of the packaging box.

[0061] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A packaging box stacking device, comprising a frame (1), a longitudinal drive unit (2) is provided on the top of the frame (1), a transverse drive unit (3) is provided on the longitudinal drive unit (2), a vertical drive unit (4) is provided on the transverse drive unit (3), a conveying frame (5) is provided on one side of the frame (1), and a roller conveying mechanism (501) is provided on the conveying frame (5), characterized in that: The top of the conveying frame (5) is provided with a height detection unit (6) and a width detection unit (7), the end of the conveying frame (5) is provided with a material blocking unit (8), the bottom of the vertical driving unit (4) is provided with a two-way cylinder (405), the telescopic ends on both sides of the two-way cylinder (405) are provided with clamping plates (406), the side of the clamping plate (406) is penetrated by a slide groove (407), a slider (408) is slidably connected in the slide groove (407), an electromagnet (409) is provided at the top of the slide groove (407), a balloon (411) is provided on the side of the slider (408), a guide hole connected to the balloon (411) is provided at the top of the slider (408), and a piston rod (412) is slidably matched in the guide hole; The width detection unit (7) comprises two symmetrically arranged support plates (701), the two support plates (701) being respectively arranged on both sides of the conveying frame (5), the side surfaces of the support plates (701) being provided with electric push rods (702), the relatively telescopic ends of the electric push rods (702) on both sides being provided with mounting plates (703), and the inner side of the mounting plates (703) being provided with a second distance measuring sensor (704).

2. The packaging box stacking device according to claim 1, characterized in that: The longitudinal drive unit (2) comprises two symmetrically arranged longitudinal slide rails (201), the two longitudinal slide rails (201) being respectively arranged at two ends of the top of the frame (1), a longitudinal slide seat (202) being slidably connected to the longitudinal slide rails (201), and a secondary pulley (203) being rotatably connected to one end of the side surface of the frame (1) via a support.

3. The packaging box stacking device according to claim 2, characterized in that: A first driving motor (204) is provided at the other end of the side of the frame (1) through a machine base, a main pulley (205) is provided on the output shaft of the first driving motor (204), the main pulley (205) and the secondary pulley (203) are connected to each other through a longitudinal transmission belt (206), and the longitudinal transmission belt (206) is fixedly connected to the longitudinal slide seat (202).

4. The packaging box stacking device according to claim 2, characterized in that: The transverse driving unit (3) comprises a transverse slide rail (301), the two ends of which are respectively arranged on the top of the two longitudinal slide seats (202), and the transverse slide rail (301) is slidably connected to the transverse slide seat (302).

5. The packaging box stacking device according to claim 4, characterized in that: One end of the transverse slide rail (301) is rotatably connected to a fixed pulley (303) via a fixed seat, and the other end of the transverse slide rail (301) is provided with a second drive motor (304) via a mounting seat, and a movable pulley (305) is provided on the output shaft of the second drive motor (304), and the movable pulley (305) and the fixed pulley (303) are connected to each other via a transverse transmission belt (306), and the transverse transmission belt (306) is fixedly connected to the transverse slide seat (302).

6. The packaging box stacking device according to claim 4, characterized in that: The vertical drive unit (4) comprises a vertical slide (401), wherein the vertical slide (401) is slidably connected to the side of the horizontal slide (302), the bottom end of the vertical slide (401) is fixedly connected to the bidirectional cylinder (405), the side of the vertical slide (401) is provided with a rack (402), the inner side of the horizontal slide (302) is provided with a lifting motor (403), the output shaft of the lifting motor (403) passes through the side of the horizontal slide (302) and is provided with a gear (404) meshing with the rack (402).

7. The packaging box stacking device according to claim 1, characterized in that: A limit spring (410) is provided between the top of the slider (408) and the top surface of the slide groove (407), and a tension sensor is provided between the end of the limit spring (410) and the top of the slider (408). The slider (408) is made of magnetic material, and the side surface of the slider (408) is coplanar with the side surface of the clamping plate (406). The balloon (411) is made of rubber material. In the initial state, the top of the piston rod (412) does not conflict with the top surface of the slide groove (407).

8. The packaging box stacking device according to claim 1, characterized in that: The height detection unit (6) comprises a bracket (601), wherein the bracket (601) is arranged on the top surface of the conveying rack (5), and a first distance measuring sensor (602) is arranged on the top of the bracket (601) via a cross bar.

9. The packaging box stacking device according to claim 1, characterized in that: The material blocking unit (8) comprises a support rod (801), wherein the support rod (801) is arranged at the end of the conveying frame (5), a fixing rod (802) is arranged at the top of the support rod (801), a baffle (803) is arranged at the end of the fixing rod (802), and pressure sensors (804) are symmetrically arranged on both sides of the baffle (803).

10. A palletizing method for a packaging box palletizing device as claimed in claim 1, characterized in that: The following steps are involved: S1, placing the packaging box on the roller conveying mechanism (501) and conveying it to the bottom of the frame (1), and corresponding to the position between the clamping plates (406) on both sides, at which time the end of the packaging box contacts the material blocking unit (8) and reaches the preset position; S2, during the conveying process, the packaging box passes through the height detection unit (6) and the width detection unit (7) in sequence and detects the height and width of the packaging box respectively, and adjusts the distance between the clamping plates (406) on both sides and the falling height according to the measured height and width; S3, using the vertical drive unit (4) to move the clamping plates (406) on both sides downward so that the two clamping plates (406) are located on both sides of the packaging box respectively, and using the contraction of the bidirectional cylinder (405) to drive the clamping plates (406) on both sides to close and clamp the packaging box; S4. After clamping is completed, the vertical drive unit (4) is used to lift the packaging box, and the longitudinal drive unit (2) and the transverse drive unit (3) are used to move the packaging box to a corresponding position above the tray located on the bottom side of the frame (1). Finally, the vertical drive unit (4) is used to place the packaging box on the tray and then the clamping plate (406) is released to complete the stacking of the packaging box.

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