A palletizing device for plastic articles

Abstract

The utility model relates to the technical field of plastic product production, and disclose a kind of for plastic product's stacking device, including stacking mechanism, discharge conveyer and feed conveyer, the discharge conveyer and feed conveyer are all located below stacking mechanism, the upper surface of feed conveyer is fixedly connected with limit baffle, the limit baffle is equipped with sliding port, two profiled sliding blocks are slidably connected in the sliding port, the side of two profiled sliding blocks is fixedly connected with L-shaped clamping plate, the side of limit baffle is fixedly connected with two end seats one, two end seats one are rotatably connected with bidirectional screw rod one by bearing seat, the utility model has realized the accurate positioning of plastic frame in conveying direction, can effectively correct the deflection of plastic frame in pre-conveying process, ensure its accuracy and consistency before being grasped by stacking mechanism, lay a solid foundation for subsequent stable stacking.

Description

Technical Field

[0001] This utility model relates to the field of plastic product manufacturing technology, and more specifically to a palletizing device for plastic products. Background Technology

[0002] In the modern production process of plastic products, automated palletizing is one of the key processes in the back-end packaging stage. Palletizing equipment usually includes a feeding conveyor belt, a palletizing robot, and an unloading conveyor belt. Its working process is as follows: plastic products (such as baskets, boxes, pallets, etc.) coming off the production line are transported to a designated workstation via the feeding conveyor belt, then the palletizing robot (or robotic arm) grabs and stacks them, and finally the stacked pallets are output via the unloading conveyor belt.

[0003] A search revealed Chinese patent CN222098971U, which discloses a palletizing device for plastic products. This device allows the movable plate and plastic sheet to be kept away from the top of the trolley, facilitating the overall handling and stacking of the plastic sheet. It is relatively convenient to use and can adjust the stacking angle. However, due to its inertia or conveyor belt vibration, the products are prone to slight offset, tilting, or angular rotation when they arrive at the palletizing station. This can lead to robot failure to grasp or insecure gripping, ultimately resulting in uneven stacking and collapse of the stack shape. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a palletizing device for plastic products to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: a palletizing device for plastic products, including a palletizing mechanism, a discharge conveyor belt, and a feed conveyor belt. The discharge conveyor belt and the feed conveyor belt are both located below the palletizing mechanism. A limit baffle is fixedly connected to the upper surface of the feed conveyor belt. A sliding opening is provided on the limit baffle. Two I-shaped sliders are slidably connected in the sliding opening. An L-shaped clamp is fixedly connected to one side of the two I-shaped sliders. Two end seats are fixedly connected to one side of the limit baffle. A bidirectional lead screw is rotatably connected between the two end seats through a bearing seat. The bidirectional lead screw passes through a threaded cylinder on one side of the two I-shaped sliders and is threadedly connected to the threaded cylinder. A drive motor for rotating the bidirectional lead screw along the axial direction is fixedly connected to one side of one of the end seats.

[0006] As a further embodiment of this utility model, two symmetrical fixed plates are fixedly connected to the feeding conveyor belt. A U-shaped frame is passed through and slidably connected to the two fixed plates. A positioning clamp is fixedly connected to one end of the U-shaped frame, and a connecting block is fixedly connected to the other end of the U-shaped frame. Two end seats are fixedly connected below the feeding conveyor belt. A bidirectional lead screw is rotatably connected between the two end seats through a bearing seat. The bidirectional lead screw passes through the two connecting blocks and is threadedly connected to the threaded cylinder on the connecting blocks. A drive motor for rotating the bidirectional lead screw along the axial direction is fixedly connected to one side of one of the end seats.

[0007] As a further embodiment of this utility model, guide rods are fixedly connected to one side of the two positioning clamps, and one end of the two guide rods on the same side passes through the fixed plate and is slidably connected to the positioning clamps through the sliding sleeve.

[0008] As a further embodiment of this utility model, an inverted U-shaped plate is fixedly connected to the upper surface of the feeding conveyor belt, a CCD camera is fixedly connected to the top inner wall of the U-shaped plate, a second U-shaped plate is fixedly connected to the bottom of the feeding conveyor belt, an electric push rod is fixedly connected to the bottom of the second U-shaped plate, a connecting frame is fixedly connected to the telescopic end of the electric push rod through the second U-shaped plate, a rotary cylinder is fixedly connected to the top inner wall of the connecting frame, and a lifting plate is fixedly connected to the end of the rotary cylinder's rotating shaft through the top of the connecting frame.

[0009] As a further embodiment of this utility model, an anti-slip pad is fixedly connected to the inner wall of the L-shaped clamp.

[0010] As a further embodiment of this utility model, the upper surface of the lifting plate is provided with multiple parallel anti-slip grooves, and the cross-section of the anti-slip grooves is semi-circular.

[0011] As a further embodiment of this utility model, the first U-shaped plate is located between the limiting baffle and the fixing plate, and the second U-shaped plate is located directly below the first U-shaped plate.

[0012] As a further embodiment of this utility model, the ends of the first and second bidirectional lead screws are connected to the output shafts of the first and second drive motors respectively via couplings.

[0013] The technical effects and advantages of this utility model are as follows: 1. This utility model achieves precise positioning of the plastic frame in the conveying direction by setting an L-shaped clamp driven by a bidirectional lead screw and combining it with a limiting baffle. It can effectively correct the skewing of the plastic frame during the pre-conveying process, ensuring the accuracy and consistency of its position before being grasped by the palletizing mechanism, and laying a solid foundation for subsequent stable palletizing.

[0014] 2. This utility model achieves rapid centering and positioning of the plastic frame in the width direction by setting a positioning clamp plate driven by a two-way lead screw and an auxiliary structure of guide rod sliding sleeve. This ensures that the plastic frame can always be transported to the center line of the feeding conveyor belt, avoids lifting and rotation correction failures caused by position deviations, and improves the reliability and adaptability of the entire system.

[0015] 3. This utility model integrates CCD camera vision recognition, electric push rod lifting mechanism and rotary cylinder to realize fully automatic recognition and posture correction of plastic basket orientation. It can automatically adjust products with different orientations to the preset standard stacking posture, which greatly improves the neatness and automation level of stacking. It is suitable for scenarios that require stacking in a specific orientation. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention.

[0017] Figure 2 This is a schematic diagram of the feeding conveyor belt of this utility model.

[0018] Figure 3 This is a structural diagram of the limiting baffle of this utility model.

[0019] Figure 4 This is a structural diagram of the U-shaped frame of this utility model.

[0020] Figure 5 This is a schematic diagram of the U-shaped plate one and U-shaped plate two of this utility model.

[0021] The attached diagram is labeled as follows: 1. Palletizing mechanism; 2. Discharge conveyor belt; 3. Feed conveyor belt; 4. Limiting baffle; 5. Sliding mouth; 6. I-shaped slider; 7. L-shaped clamp; 8. End seat one; 9. Bidirectional lead screw one; 10. Drive motor one; 11. Fixing plate; 12. U-shaped frame; 13. Connecting block; 14. End seat two; 15. Bidirectional lead screw two; 16. Drive motor two; 17. Positioning clamp; 18. U-shaped plate one; 19. CCD camera; 20. U-shaped plate two; 21. Electric push rod; 22. Connecting frame; 23. Rotary cylinder; 24. Lifting plate. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Reference Figures 1-5This utility model provides a palletizing device for plastic products, including a palletizing mechanism 1, a discharge conveyor belt 2, and a feed conveyor belt 3. The discharge conveyor belt 2 and the feed conveyor belt 3 are both located below the palletizing mechanism 1. A limit baffle 4 is fixedly connected to the upper surface of the feed conveyor belt 3 by bolts. A sliding opening 5 is provided on the limit baffle 4. Two I-shaped sliders 6 are slidably connected in the sliding opening 5. An L-shaped clamp 7 is fixedly connected to one side of the two I-shaped sliders 6 by bolts. An anti-slip pad is fixedly connected to the inner side wall of the L-shaped clamp 7 by bolts. Two end seats 8 are fixedly connected to one side of the limit baffle 4 by bolts. A bidirectional lead screw 9 is rotatably connected between the two end seats 8 through a bearing seat. The bidirectional lead screw 9 passes through a threaded cylinder on one side of the two I-shaped sliders 6 and is threadedly connected to the threaded cylinder. A drive motor 10 that causes the bidirectional lead screw 9 to rotate axially is fixedly connected to one side of one of the end seats 8 by bolts.

[0024] The palletizing mechanism 1 uses a three-axis walking mechanism on the gantry to drive the suction cup frame at the end to move precisely in the X, Y, and Z directions in space, thus achieving precise control over the gripping and stacking positions of the plastic crates.

[0025] It should be noted that the drive motor 10 is existing technology, which is a servo motor with an encoder. The number of rotations and rotation angle of the motor output shaft are controllable and have high precision. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0026] The plastic crate, after its orientation has been corrected, is placed back onto the feeding conveyor belt 3 and continues to be conveyed until it contacts the limiting baffle 4. After the plastic crate contacts the limiting baffle 4, the drive motor 10 starts, driving the bidirectional lead screw 9 to rotate. The two I-shaped sliders 6, which are engaged with the two opposite threads of the bidirectional lead screw 9, move synchronously towards each other within the sliding opening 5 of the limiting baffle 4. The I-shaped sliders 6 drive the L-shaped clamps 7 on them to move, thereby positioning the plastic crate from both sides of the conveying direction. During the positioning process, the suction cup at the end of the stacking mechanism 1 extends into the plastic crate to adsorb it. After adsorption is completed, the L-shaped clamps 7 release the plastic crate and return to the initial position. Then, the stacking mechanism 1 sends the plastic crate to the pallet on the discharge conveyor belt 2 for stacking.

[0027] By setting an L-shaped clamp 7 driven by a bidirectional lead screw 9 and combining it with a limiting baffle 4, the plastic frame is accurately positioned in the conveying direction. This effectively corrects the skew of the plastic frame during the pre-transfer process, ensuring the accuracy and consistency of its position before being grasped by the palletizing mechanism 1, thus laying a solid foundation for subsequent stable palletizing.

[0028] In this utility model, two symmetrical fixing plates 11 are fixedly connected to the feeding conveyor belt 3 by bolts. A U-shaped frame 12 is inserted through and slidably connected to the two fixing plates 11. A positioning clamp 17 is fixedly connected to one end of the U-shaped frame 12 by bolts, and a connecting block 13 is fixedly connected to the other end of the U-shaped frame 12 by bolts. Two end seats 14 are fixedly connected to the bottom of the feeding conveyor belt 3 by bolts. A bidirectional lead screw 15 is rotatably connected between the two end seats 14 by a bearing seat. The bidirectional lead screw 15 passes through the two connecting blocks 13 and is threadedly connected to the threaded cylinder on the connecting block 13. A drive motor 16 that causes the bidirectional lead screw 15 to rotate axially is fixedly connected to one side of one of the end seats 14 by bolts.

[0029] It should be noted that the drive motor 216 is existing technology, which is a servo motor with an encoder. The number of rotations and rotation angle of the motor output shaft are controllable and have high precision. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0030] In this application, the connecting block 13 and the I-shaped slider 6 have an axially arranged annular groove on the inner wall of the threaded cylinder. A nylon 66 damping ring with a Shore hardness of 85A is embedded in the groove. The continuous axial clamping force generated by its elastic deformation forms a helical angle interference fit of 15°-20° with the surfaces of the first and second double-acting screws 9 and 15, respectively. When the threaded pair is subjected to axial vibration load, the nylon insert can generate a maximum elastic compression of 0.3mm, which increases the friction coefficient between the thread contact surfaces from 0.15 to 0.68 (tested according to ASTM D1894 standard), effectively suppressing the loosening displacement caused by thread springback.

[0031] By setting up a positioning clamping plate 17 driven by a bidirectional lead screw 15 and an auxiliary structure for the guide rod sliding sleeve, the plastic frame is quickly centered and positioned in the width direction, ensuring that the plastic frame can always be conveyed to the center line of the feeding conveyor belt 3, avoiding lifting and rotation correction failures caused by position deviations, and improving the reliability and adaptability of the entire system.

[0032] Furthermore, guide rods are fixedly connected to one side of the two positioning clamps 17 by bolts, and one end of the two guide rods on the same side passes through the fixing plate 11 and is slidably connected to the positioning clamps 17 through the sliding sleeve.

[0033] The plastic crate is conveyed by the feeding conveyor belt 3. First, the width direction is limited and adjusted. During the adjustment, the drive motor 16 is started, which drives the bidirectional lead screw 15 to rotate. Through the two connecting blocks 13 that are threaded to the bidirectional lead screw 15, the two U-shaped frames 12 are driven to move synchronously towards each other along the fixed plate 11. The positioning clamps 17 at the ends of the U-shaped frames 12 clamp and position the plastic crate from the left and right sides of the conveying direction. Then, the positioning clamps 17 are immediately released to reset the plastic crate, so that the plastic crate is located in the middle position of the feeding conveyor belt 3.

[0034] In this utility model, an inverted U-shaped plate 18 is bolted to the upper surface of the feeding conveyor belt 3. A CCD camera 19 is bolted to the inner top wall of the U-shaped plate 18. A U-shaped plate 20 is bolted to the bottom of the feeding conveyor belt 3. An electric push rod 21 is bolted to the bottom of the U-shaped plate 20. A connecting frame 22 is bolted to the telescopic end of the electric push rod 21 through the U-shaped plate 20. A rotary cylinder 23 is bolted to the inner top wall of the connecting frame 22. A lifting plate 24 is bolted to the end of the rotating shaft of the rotary cylinder 23 through the top of the connecting frame 22. The U-shaped plate 18 is located between the limiting baffle 4 and the fixing plate 11. The U-shaped plate 20 is located directly below the U-shaped plate 18.

[0035] It should be noted that the rotary cylinder 23 used is a power actuator that converts the pressure energy of compressed air into rotational motion. Its core principle is to use compressed air to drive the internal piston or blade, thereby driving the output shaft to rotate at a certain angle. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0036] It should be noted that the electric push rod 21 is existing technology and can be used with magnetic switches, proximity switches or photoelectric switches to achieve precise control of the push rod's extension and retraction displacement. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0037] The CCD camera 19 is a digital camera that uses a charge-coupled device (CCD) as an image sensor. Therefore, the CCD camera converts the optical scene into a digital image signal and outputs a raw pixel matrix, which is then used in conjunction with subsequent software algorithms to achieve image recognition.

[0038] When the plastic crate is conveyed by the feeding conveyor belt 3 to a position directly below the CCD camera 19, the CCD camera 19 starts to capture images of the positioned plastic crate below, identifying its current position and orientation. If the plastic crate is being conveyed laterally relative to the feeding conveyor belt 3, the electric push rod 21 extends and lifts upward, driving the lifting plate 24 to rise through the connecting frame 22, lifting the clamped plastic crate and detaching it from the surface of the feeding conveyor belt 3. Subsequently, the rotary cylinder 23 starts to work, driving the lifting plate 24 and the plastic crate on it to rotate 90 degrees, adjusting it to the preset standard stacking posture.

[0039] By integrating a CCD camera 19 for visual recognition, an electric push rod 21 for lifting mechanism, and a rotary cylinder 23, the fully automatic recognition and posture correction of the orientation of plastic crates is achieved. It can automatically adjust products with different orientations to a preset standard stacking posture, greatly improving the neatness and automation level of stacking, and is suitable for scenarios that require stacking in a specific orientation.

[0040] Furthermore, the upper surface of the lifting plate 24 has multiple parallel anti-slip grooves, and the cross-section of the anti-slip grooves is semi-circular.

[0041] After the posture adjustment is completed, the electric push rod 21 retracts, driving the lifting plate 24 to descend and put the plastic basket that has completed the orientation correction back onto the feeding conveyor belt 3.

[0042] In this invention, the ends of the bidirectional lead screw 9 and the bidirectional lead screw 15 are connected to the output shafts of the drive motor 10 and the drive motor 16, respectively, via couplings.

[0043] The use of this utility model involves the following steps: S1: The plastic basket is conveyed by the feeding conveyor belt 3. First, the width direction is limited and adjusted. During the adjustment, the drive motor 16 is started, which drives the bidirectional lead screw 15 to rotate. Through the two connecting blocks 13 that are threaded to the bidirectional lead screw 15, the two U-shaped frames 12 are driven to move synchronously towards each other along the fixed plate 11. The positioning clamps 17 at the ends of the U-shaped frames 12 clamp and position the plastic basket from the left and right sides of the conveying direction. Then, the positioning clamps 17 are immediately released to reset the plastic basket, so that the plastic basket is located in the middle position of the feeding conveyor belt 3. S2: When the plastic crate is conveyed by the feeding conveyor belt 3 to the CCD camera 19, the CCD camera 19 starts to acquire images of the plastic crate that has been positioned below, and identifies its current position and orientation. If the plastic crate is conveyed laterally relative to the feeding conveyor belt 3, the electric push rod 21 extends and lifts upward, driving the lifting plate 24 to rise through the connecting frame 22, lifting the clamped plastic crate and making it detach from the surface of the feeding conveyor belt 3. Subsequently, the rotary cylinder 23 starts to work to drive the lifting plate 24 and the plastic crate on it to rotate 90 degrees, adjusting it to the preset standard stacking posture. S3: After the posture adjustment is completed, the electric push rod 21 retracts, driving the lifting plate 24 to descend and placing the plastic basket that has completed the direction correction back onto the feeding conveyor belt 3. It continues to be conveyed until it contacts the limiting baffle 4. After the plastic basket contacts the limiting baffle 4, the drive motor 10 starts and drives the bidirectional lead screw 9 to rotate. The two I-shaped sliders 6, which are engaged with the two opposite threads of the bidirectional lead screw 9, move synchronously towards each other in the sliding mouth 5 of the limiting baffle 4. The I-shaped sliders 6 drive the L-shaped clamps 7 on them to move, thereby positioning the plastic basket from both sides of the conveying direction. During the positioning process, the suction cup at the end of the stacking mechanism 1 extends into the plastic basket to adsorb it. After adsorption is completed, the L-shaped clamps 7 release the plastic basket and return to the initial position. Then, the stacking mechanism 1 sends the plastic basket to the pallet on the discharge conveyor belt 2 for stacking.

[0044] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change. The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs. The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A palletizing device for plastic products, comprising a palletizing mechanism (1), a discharge conveyor belt (2), and a feed conveyor belt (3), wherein the discharge conveyor belt (2) and the feed conveyor belt (3) are both located below the palletizing mechanism (1), characterized in that: The upper surface of the feeding conveyor belt (3) is fixedly connected to a limiting baffle (4). A sliding opening (5) is provided on the limiting baffle (4). Two I-shaped sliders (6) are slidably connected in the sliding opening (5). An L-shaped clamp (7) is fixedly connected to one side of the two I-shaped sliders (6). Two end seats (8) are fixedly connected to one side of the limiting baffle (4). A bidirectional lead screw (9) is rotatably connected between the two end seats (8) through a bearing seat. The bidirectional lead screw (9) passes through a threaded cylinder on one side of the two I-shaped sliders (6) and is threadedly connected to the threaded cylinder. A drive motor (10) is fixedly connected to one side of one of the end seats (8) to make the bidirectional lead screw (9) rotate axially.

2. The palletizing device for plastic products according to claim 1, characterized in that: Two symmetrical fixed plates (11) are fixedly connected to the feeding conveyor belt (3). A U-shaped frame (12) is inserted and slidably connected to the two fixed plates (11). A positioning clamp (17) is fixedly connected to one end of the U-shaped frame (12), and a connecting block (13) is fixedly connected to the other end of the U-shaped frame (12). Two end seats (14) are fixedly connected to the bottom of the feeding conveyor belt (3). A two-way screw (15) is rotatably connected between the two end seats (14) through a bearing seat. The two-way screw (15) passes through the two connecting blocks (13) and is threadedly connected to the threaded cylinder on the connecting block (13). A drive motor (16) is fixedly connected to one side of one of the end seats (14) to make the two-way screw (15) rotate axially.

3. A palletizing device for plastic products according to claim 2, characterized in that: One side of each of the two positioning clamps (17) is fixedly connected with a guide rod, and one end of each of the two guide rods on the same side passes through the fixed plate (11) and is slidably connected to the positioning clamp (17) through a sliding sleeve.

4. A palletizing device for plastic products according to claim 1, characterized in that: An inverted U-shaped plate (18) is fixedly connected to the upper surface of the feeding conveyor belt (3). A CCD camera (19) is fixedly connected to the top inner wall of the U-shaped plate (18). A U-shaped plate (20) is fixedly connected to the bottom of the feeding conveyor belt (3). An electric push rod (21) is fixedly connected to the bottom of the U-shaped plate (20). A connecting frame (22) is fixedly connected through the telescopic end of the electric push rod (21) through the U-shaped plate (20). A rotary cylinder (23) is fixedly connected to the top inner wall of the connecting frame (22). A lifting plate (24) is fixedly connected through the rotating shaft end of the rotary cylinder (23) through the top of the connecting frame (22).

5. A palletizing device for plastic products according to claim 1, characterized in that: Anti-slip pads are fixedly connected to the inner wall of the L-shaped clamp (7).

6. A palletizing device for plastic products according to claim 4, characterized in that: The upper surface of the lifting plate (24) has multiple parallel anti-slip grooves, and the cross-section of the anti-slip grooves is semi-circular.

7. A palletizing device for plastic products according to claim 4, characterized in that: The first U-shaped plate (18) is located between the limiting baffle (4) and the fixing plate (11), and the second U-shaped plate (20) is located directly below the first U-shaped plate (18).

8. A palletizing device for plastic products according to claim 1, characterized in that: The ends of the first bidirectional lead screw (9) and the second bidirectional lead screw (15) are connected to the output shafts of the first drive motor (10) and the second drive motor (16) respectively via couplings.

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