An automatic stacking equipment for plastic bottles

Abstract

This application relates to an automatic plastic bottle stacking device, belonging to the field of automatic product stacking. To address the low efficiency of existing plastic bottle stacking methods, the device includes a work frame with a feeding conveyor belt mounted on it. A limit component is installed on the feeding conveyor belt to limit the number and position of plastic bottles on it. A pre-stacking platform is located on one side of the work frame along the width of the feeding conveyor belt, and a pallet assembly is located on the side of the pre-stacking platform away from the feeding conveyor belt. A pushing component is also installed on the work frame, which either pre-stacking the plastic bottles from the feeding conveyor belt onto the pre-stacking platform or pushing the pre-stacking bottles onto the pre-stacking platform to the pallet assembly. This application improves the efficiency of plastic bottle stacking.

Description

Technical Field

[0001] This application relates to the field of automatic product stacking, and in particular to an automatic stacking device for plastic bottles. Background Technology

[0002] The lightweight and corrosion-resistant properties of plastic bottles have led to their widespread use in production and daily life. After production, plastic bottles need to be stacked in rows and then packed into boxes or bags for easy storage.

[0003] Current technology typically uses push-type stacking machines, where a reciprocating pusher directly pushes plastic bottles into packaging boxes for stacking. The bottles in the back row align with those in the front row before being bundled together. However, when a box is full, an operator needs to remove the full box, seal it, and then place an empty box next to the push-type stacking machine. During this process, feeding the machine needs to be stopped to prevent the pusher from pushing out the bottles before the empty box is properly placed, causing them to fall. However, this method results in a long waiting time for manual box replacement and low stacking efficiency, thus requiring improvement. Summary of the Invention

[0004] To improve the efficiency of plastic bottle stacking, this application provides an automatic plastic bottle stacking device.

[0005] The automatic stacking equipment for plastic bottles provided in this application adopts the following technical solution:

[0006] An automatic plastic bottle stacking device includes a work frame with a feeding conveyor belt mounted on it. A limit component is mounted on the feeding conveyor belt to limit the number and position of plastic bottles on it. A pre-stacking platform is located on one side of the work frame along the width of the feeding conveyor belt, and a pallet assembly is located on the side of the pre-stacking platform away from the feeding conveyor belt. A pushing component is also installed on the work frame to pre-stacking the plastic bottles on the feeding conveyor belt onto the pre-stacking platform, or to push the pre-stacking plastic bottles onto the pre-stacking platform to the pallet assembly.

[0007] By adopting the above technical solution, after the plastic bottles are produced and output via the production conveyor belt, the feeding end of the feeding conveyor belt receives the plastic bottles and moves them sequentially into the limiting range of the limiting component. Once the number of plastic bottles in the limiting component reaches a set value, the limiting component prevents subsequent plastic bottles from entering the work rack. The pushing component then neatly pushes several rows of plastic bottles from the feeding conveyor belt onto the pre-stacking platform for pre-stacking. Once the number of plastic bottles on the pre-stacking platform reaches a set value, the pushing component pushes the pre-stacking plastic bottles onto the pallet component. Operators then pack the neatly arranged plastic bottles on the pallet component. Through the cooperation of the limiting component, the pre-stacking platform, and the pushing component, the completed plastic bottles are transferred from the conveyor belt to the pallet component, facilitating the arrangement and packaging of the plastic bottles. During the process of changing packaging boxes, the plastic bottles are pre-stacking on the pre-stacking platform, and the entire stacking process does not require pausing, improving the packaging efficiency of the plastic bottles.

[0008] Optionally, the limiting component includes a first stop bar and a third stop bar; the first stop bar is installed at the end of the feeding conveyor belt and is fixedly installed; the third stop bar is installed on the feeding conveyor belt at the end away from the first stop bar and is movably installed, extending out of the side wall of the feeding conveyor belt or retracting; the distance between the first stop bar and the third stop bar is equal to N times the diameter of the plastic bottles.

[0009] Optionally, the limiting component further includes a second stop bar, which is disposed between the first stop bar and the third stop bar; the second stop bar is installed on the feeding conveyor belt near one end of the first stop bar, and the second stop bar is movably configured to extend out of the side wall of the feeding conveyor belt or retract; the distance between the first stop bar and the second stop bar is equal to half the diameter of a plastic bottle, and the distance between the second stop bar and the third stop bar is greater than the diameter of N-1 plastic bottles.

[0010] By adopting the above technical solution, the feeding conveyor belt carries the plastic bottles into the working frame. At this time, the third and second stop bars are in a retracted state. The first plastic bottle entering the working frame is blocked by the first stop bar, and subsequent plastic bottles are blocked by the previous plastic bottle, all sliding relative to the feeding conveyor belt. When the Nth plastic bottle passes the third stop bar, the third stop bar extends, blocking the entry of subsequent plastic bottles, and a row of N plastic bottles is neatly arranged on the feeding conveyor belt. After one feeding cycle, the third stop bar retracts, and the second stop bar extends, blocking the plastic bottles; when the (N-1)th plastic bottle passes the third stop bar, the third stop bar extends, and a row of N-1 plastic bottles is neatly arranged on the feeding conveyor belt. With the alternating extension of the first, second, and third baffles, adjacent rows of plastic bottles are staggered, with each bottle sandwiched between four adjacent bottles. The multiple packaged bottles are tightly arranged, improving the stability of the packaging and preventing them from loosening during transfer and transportation. The staggered arrangement of the bottles also reduces the volume of the packaging, saving space needed for storage or transportation and lowering storage and transportation costs.

[0011] Optionally, the feeding conveyor belt is provided with a first guard plate and a second guard plate. The first guard plate is installed on the side of the feeding conveyor belt away from the pallet assembly in the width direction, and extends from the beginning end of the feeding conveyor belt to the end of the conveyor belt. The second guard plate is provided at one end of the feeding conveyor belt that protrudes from the work frame, and is installed on the side of the feeding conveyor belt near the pallet assembly in the width direction. A lifting guard plate is also provided on the side of the feeding conveyor belt near the pallet assembly in the width direction. The lifting guard plate is installed inside the work frame and is movably configured to extend out of the top wall of the feeding conveyor belt or retract. The distance between the lifting guard plate and the first guard plate is equal to the diameter of the plastic bottle.

[0012] By adopting the above technical solution, when the plastic bottle reaches the point where the production conveyor belt and the feeding conveyor belt converge, the side wall of the plastic bottle contacts the side wall of the inclined section of the second guard plate. The inclined side wall of the second guard plate guides the plastic bottle onto the feeding conveyor belt until the top wall of the feeding conveyor belt contacts the bottom wall of the plastic bottle. Under the action of friction, the plastic bottle moves. At this time, the side wall of the plastic bottle also contacts the side wall of the first guard plate, preventing the plastic bottle from falling off the feeding conveyor belt. After the plastic bottle enters the work frame, the side wall of the plastic bottle detaches from the second guard plate and contacts the side wall of the lifting guard plate. The lifting guard plate and the first guard plate clamp the plastic bottle, arranging multiple plastic bottles in a straight line. This facilitates the subsequent arrangement of plastic bottles.

[0013] Optionally, the lifting guard plate has sliding grooves at both ends, which are mounted on the work frame and are vertically arranged. Slider blocks are installed at both ends of the lifting guard plate, with one end connected to the bottom wall of the lifting guard plate and the other end inserted into the sliding groove of the sliding groove. The lifting guard plate reciprocates along the length of the sliding groove. A first wedge block is provided in the middle of the lifting guard plate, and a top rod is installed on the third stop rod. One end of the top rod is connected to the third stop rod, and the other end is connected to a second wedge block. The inclined surface of the first wedge block fits against the inclined surface of the second wedge block. The third stop rod and the lifting guard plate extend out in a staggered manner.

[0014] Optionally, a limiting plate is provided on the lifting guard plate, and the length direction of the limiting plate is parallel to the length direction of the lifting guard plate; a horizontal groove is opened on the top wall of the lifting guard plate, and the limiting plate is slidably disposed in the horizontal groove; a plurality of guide blocks are installed on the top of the limiting plate, and the plurality of guide blocks are spaced apart along the length direction of the limiting plate, and the distance between every two guide blocks is equal to the diameter of the plastic bottle.

[0015] Optionally, a vertical groove is formed on the side wall of the lifting guard plate near the second stop bar, the vertical groove exposing part of the side wall of the limiting plate, and an inclined groove is formed on the side wall of the limiting plate near the vertical groove; a third wedge block is installed on the second stop bar, and the inclined surface of the third wedge block can be in contact with the inclined surface of the inclined groove; the second stop bar extends, forcing the limiting plate to move away from the second stop bar; a return spring is provided at the end of the limiting plate away from the vertical groove, one end of the return spring is connected to the side wall of the limiting plate away from the inclined groove, and the other end is connected to the side wall of the horizontal groove away from the vertical groove.

[0016] By adopting the above technical solution, the third stop bar retracts, forcing the lifting guard plate to extend the limiting plate, which then contacts the plastic bottle. When the second stop bar is retracted, the return spring presses the limiting plate against the inner wall of the transverse groove, and N plastic bottles are arranged on the feeding conveyor belt. When the second stop bar extends, it forces the limiting plate to move half the diameter of the plastic bottle in the direction of the return spring, and N-1 plastic bottles are arranged on the feeding conveyor belt. In both cases, the guide block is always located between two adjacent plastic bottles. When the third stop bar extends, gravity causes the lifting guard plate to descend, and during the descent, the guide block corrects the position of the plastic bottles, ensuring that N or N-1 plastic bottles are neatly arranged. The third stop bar is linked to the lifting guard plate, and the second stop bar is linked to the limiting plate, improving the efficiency of staggered arrangement of plastic bottles and reducing equipment costs by reducing the number of cylinders. The guide block further improves the stability of the staggered arrangement of multiple rows of plastic bottles, reducing the possibility of bottle displacement.

[0017] Optionally, guide rods are provided on both sides of the pre-stacking platform. The guide rods are installed on the work frame, and the length direction of the guide rods is perpendicular to the length direction of the feeding conveyor belt. The distance between the guide rods is equal to the diameter of N plastic bottles. The guide rods extend from above the feeding conveyor belt to above the pallet assembly.

[0018] Optionally, the feeding assembly includes a first feeding frame, a second feeding frame, and two lead screws; the lead screws are installed above the feeding conveyor belt and the tray assembly, and the length direction of the lead screws is perpendicular to the length direction of the feeding conveyor belt; the first feeding frame and the second feeding frame are respectively threadedly connected to one of the lead screws, and the rotation of the lead screws controls the first feeding frame and the second feeding frame to reciprocate along the length direction of the lead screws, and the second feeding frame is disposed between the first feeding frame and the feeding conveyor belt; a first feeding plate is movably disposed on the first feeding frame, and the first feeding plate reciprocates along the height direction of the first feeding frame; a second feeding plate is movably disposed on the second feeding frame, and the second feeding plate reciprocates along the height direction of the second feeding frame; the first feeding plate and the second feeding plate can contact the side wall of the plastic bottle.

[0019] By adopting the above technical solution, when the first row of N plastic bottles is closely arranged on the feeding conveyor belt, the side wall of the plastic bottle blocked by the first baffle bar contacts the side wall of the guide bar. At this time, the second pusher is located above the first guard plate and on the other side of the plastic bottle. The first pusher plate and the second pusher plate descend to the guide bar and jointly clamp the first row of N plastic bottles. The two servo motors start at the same time, causing the first pusher plate and the second pusher plate to clamp the first row of N plastic bottles and move along the guide bar to the pre-stacking platform, thus completing the transfer of the first row of N plastic bottles. The first pusher plate remains stationary, while the second pusher plate returns to above the first guard plate. The second baffle extends, and the N-1 plastic bottles in the second row are tightly arranged on the feeding conveyor belt. The second pusher plate descends and moves towards the first pusher frame, pushing the sidewalls of the N-1 plastic bottles in the second row to contact the sidewalls of the N plastic bottles in the first row. The two rows of plastic bottles are staggered and clamped by the first and second pusher plates. The first and second pusher plates, clamping the two rows of staggered plastic bottles, move along the guide rod to the pre-stacking platform, completing the transfer of the N-1 plastic bottles in the second row. The cooperation of the two pusher plates and the guide rod reduces the possibility of plastic bottles shifting due to friction during transfer and improves the tightness between each row of plastic bottles.

[0020] Optionally, the pallet assembly includes a lifting platform and several pallets. The lifting platform is installed on the side of the pre-stacking platform away from the feeding conveyor belt, and the lifting platform moves intermittently in the vertical direction. The pallets can be placed directly on the lifting platform or on the lower pallets filled with plastic bottles. The top wall of the pallet is smoothly connected to the top wall of the pre-stacking platform.

[0021] By employing the above technical solution, the operator places the pallet bottom plate on the lifting platform, folds down the side plate near the pre-stacking platform, and inserts it into the gap between the lifting platform and the pre-stacking platform, ensuring a smooth connection between the top wall of the pallet bottom plate and the pre-stacking platform. The first and second pusher plates, holding multiple rows of staggered plastic bottles, move along the guide rod to the pallet bottom plate, completing the transfer of the first layer of multiple rows of plastic bottles. Subsequently, the pusher assembly continues to arrange plastic bottles on the pre-stacking platform, the lifting platform descends, and the operator resets the folded side plate and secures it to the remaining side plates, thus surrounding the plastic bottles with the pallet side plates. The operator places another pallet on the lifting platform, adjusting the height of the platform and the position of the pallet until the top wall of the pallet smoothly connects with the pre-stacking platform; the pusher assembly transfers the second layer of staggered plastic bottles from the pre-stacking platform to the second pallet. This process is repeated until multiple pallets filled with staggered plastic bottles are stacked on the lifting platform. The operator then packs and transfers the stacked pallets as a whole. By combining the lifting platform and the feeding component, plastic bottles can be arranged and stacked in a staggered manner, thereby improving the packaging efficiency of plastic bottles.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. After the plastic bottles are produced and output via the production conveyor belt, the feeding end of the feeding conveyor belt receives the plastic bottles and moves them sequentially into the limiting range of the limiting component. Once the number of plastic bottles in the limiting component reaches a set value, the limiting component prevents subsequent plastic bottles from entering the work rack. The pushing component then neatly pushes several rows of plastic bottles from the feeding conveyor belt onto the pre-stacking platform for pre-stacking. Once the number of plastic bottles on the pre-stacking platform reaches a set value, the pushing component pushes the pre-stacking plastic bottles onto the pallet component. The operator then packages the neatly arranged plastic bottles on the pallet component. Through the cooperation of the limiting component, the pre-stacking platform, and the pushing component, the completed plastic bottles are transferred from the conveyor belt to the pallet component, facilitating the arrangement and packaging of the plastic bottles. During the process of changing packaging boxes, the plastic bottles are pre-stacking on the pre-stacking platform, and the entire stacking process does not require pausing, improving the packaging efficiency of the plastic bottles.

[0024] 2. The feeding conveyor belt carries plastic bottles into the work frame. At this time, the third and second stop bars are in the retracted state. The first plastic bottle entering the work frame is blocked by the first stop bar, and subsequent plastic bottles are blocked by the previous one, all sliding relative to the feeding conveyor belt. When the Nth plastic bottle passes the third stop bar, the third stop bar extends, blocking the entry of subsequent plastic bottles, and a row of N plastic bottles is neatly arranged on the feeding conveyor belt. After one feeding cycle, the third stop bar retracts, and the second stop bar extends, blocking the plastic bottles; when the (N-1)th plastic bottle passes the third stop bar, the third stop bar extends, and a row of N-1 plastic bottles is neatly arranged on the feeding conveyor belt. With the alternating extension of the first, second, and third baffles, adjacent rows of plastic bottles are staggered, with one plastic bottle sandwiched between four adjacent plastic bottles. The multiple packaged plastic bottles are tightly arranged, improving the stability of the plastic bottle packaging and making it less likely to loosen during transfer and transportation. The staggered placement of the plastic bottles reduces the packaging volume, saves the space required for storage or transportation, and reduces storage and transportation costs.

[0025] 3. The third stop bar retracts, forcing the lifting guard plate to extend the limiting plate, which then contacts the plastic bottles. When the second stop bar is retracted, the return spring presses the limiting plate against the inner wall of the transverse groove, and N plastic bottles are arranged on the feeding conveyor belt. When the second stop bar extends, it forces the limiting plate to move half the diameter of a plastic bottle towards the return spring, and N-1 plastic bottles are arranged on the feeding conveyor belt. In both cases, the guide block is always positioned between two adjacent plastic bottles. When the third stop bar extends, gravity causes the lifting guard plate to descend, and during the descent, the guide block corrects the position of the plastic bottles, resulting in N or N-1 plastic bottles being neatly arranged. The third stop bar and the lifting guard plate are linked, as are the second stop bar and the limiting plate, improving the efficiency of staggered arrangement of plastic bottles and reducing equipment costs by reducing the number of cylinders. The guide block further improves the stability of the staggered arrangement of multiple rows of plastic bottles, reducing the possibility of bottle displacement. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of an automatic stacking device for plastic bottles according to Embodiment 1 of this application.

[0027] Figure 2 This is a schematic diagram of the feeding conveyor belt and limiting component of Embodiment 1 of this application.

[0028] Figure 3 This is a schematic diagram of the pusher assembly and tray assembly of Embodiment 1 of this application.

[0029] Figure 4 yes Figure 3 A magnified view of A in the middle.

[0030] Figure 5 This is a schematic diagram illustrating the linkage relationship between the lifting guard plate and the third stop bar in Embodiment 2 of this application.

[0031] Figure 6 This is a schematic diagram illustrating the linkage relationship between the limiting plate and the second stop bar in Embodiment 2 of this application.

[0032] Figure 7 This is a schematic diagram illustrating the positional relationship between the plastic bottle and the guide block in Embodiment 2 of this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Work frame; 2. Feeding conveyor belt; 21. First guard plate; 22. Second guard plate; 3. Limiting assembly; 31. First stop bar; 32. Second stop bar; 321. Third wedge block; 33. Third stop bar; 331. Top rod; 4. Pallet assembly; 41. Lifting platform; 42. Pallet; 421. Base plate; 422. Side plate; 5. Pushing assembly; 51. First pusher frame; 511. First pusher plate; 52. Second pusher frame; 521. Second pusher plate; 53. Lead screw; 6. Lifting guard plate; 61. Sliding trough; 62. Slider; 63. First wedge block; 64. Second wedge block; 65. Horizontal trough; 66. Vertical trough; 7. Pre-stacking platform; 71. Guide rod; 8. Limiting plate; 81. Guide block; 82. Inclined trough; 83. Return spring; 9. Production conveyor belt. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0035] This application discloses an automatic stacking device for plastic bottles.

[0036] Example 1

[0037] Reference Figure 1 The automatic plastic bottle stacking equipment includes a work frame 1, which is installed on the ground. A feeding conveyor belt 2 is installed inside the work frame 1, with its starting end extending beyond the work frame 1. The automatic plastic bottle stacking equipment is located on one side of the plastic bottle production line. After production, the plastic bottles are transported by a production conveyor belt 9. The end of the feeding conveyor belt 2 extending beyond the work frame 1 is parallel to a portion of the production conveyor belt 9. The production conveyor belt 9 transports the inspected and qualified plastic bottles to the feeding conveyor belt 2, transferring them to the work frame 1. A pre-stacking platform 7 is installed on one side of the feeding conveyor belt 2 in the width direction. The pre-stacking platform 7 is installed on the work frame 1, and its top wall is parallel to the top wall of the feeding conveyor belt 2. A pallet assembly 4 is installed on the side of the pre-stacking platform 7 away from the feeding conveyor belt 2.

[0038] A limiting component 3 is installed on the feeding conveyor belt 2 and mounted on the work frame 1 to limit the number and position of plastic bottles on the feeding conveyor belt 2. A lifting guard plate 6 is installed between the feeding conveyor belt 2 and the pre-stacking platform 7. The lifting guard plate 6 is movably mounted on the pre-stacking platform 7 and driven by a cylinder mounted on the pre-stacking platform 7 to reciprocate vertically. The lifting guard plate 6 extends or retracts between the pre-stacking platform 7 and the feeding conveyor belt 2, so that several plastic bottles on the feeding conveyor belt 2 are neatly arranged. A pushing component 5 is installed on the work frame 1 and is mounted above the pre-stacking platform 7. The pushing component 5 reciprocates between the feeding conveyor belt 2, the pre-stacking platform 7, and the pallet assembly 4 to transfer the plastic bottles on the feeding conveyor belt 2 to the pallet assembly 4 via the pre-stacking platform 7.

[0039] When the plastic bottles are produced and output via the production conveyor belt 9, the feeding end of the feeding conveyor belt 2 receives the plastic bottles and moves them sequentially into the limiting range of the limiting component 3. At this time, the lifting guard plate 6 protrudes from the pre-stacking platform 7, making the plastic bottles on the feeding conveyor belt 2 neatly arranged. After the number of plastic bottles in the limiting component 3 reaches the set value, the limiting component 3 blocks the subsequent plastic bottles from entering the work rack 1. At this time, the lifting guard plate 6 retracts to below the pre-stacking platform 7, and the pushing component 5 neatly pushes a row of plastic bottles from the feeding conveyor belt 2 onto the pre-stacking platform 7. The above steps are repeated to pre-stacking the plastic bottles on the pre-stacking platform 7 until several rows of plastic bottles are neatly arranged on the pre-stacking platform 7. The pushing component 5 neatly pushes several rows of plastic bottles onto the pallet component 4, and the operator packs the neatly arranged plastic bottles on the pallet component 4.

[0040] Reference Figure 1 and Figure 2To transfer plastic bottles from the production conveyor belt 9 to the feeding conveyor belt 2, a second guard plate 22 is provided on the portion of the feeding conveyor belt 2 that protrudes from the work frame 1. The second guard plate 22 and the lifting guard plate 6 are installed on the same side in the width direction of the feeding conveyor belt 2. The end of the second guard plate 22 closest to the production conveyor belt 9 is inclined, and it is inclined towards the feeding conveyor belt 2 along the movement direction of the feeding conveyor belt 2. The inclined section of the second guard plate 22 extends above the production conveyor belt 9. The straight section of the second guard plate 22 is parallel to the length direction of the feeding conveyor belt 2. A first guard plate 21 is provided on the side of the feeding conveyor belt 2 away from the second guard plate 22 in the width direction. The end of the first guard plate 21 closest to the production conveyor belt 9 is inclined, and the inclined section of the first guard plate 21 extends above the production conveyor belt 9. The length direction of the straight section of the first guard plate 21 is parallel to the length direction of the feeding conveyor belt 2, and the straight section of the first guard plate 21 extends towards the transmission end of the feeding conveyor belt 2. The distance between the second guard plate 22 and the first guard plate 21 is always equal to the diameter of the plastic bottle. The first guard plate 21 and the lifting guard plate 6 are located on both sides of the width direction of the feeding conveyor belt 2, respectively. The distance between the straight section of the first guard plate 21 and the lifting guard plate 6 is equal to the diameter of the plastic bottle. Both the first guard plate 21 and the lifting guard plate 6 are in contact with the lower side wall of the plastic bottle, so that multiple plastic bottles are arranged along the length direction of the feeding conveyor belt 2.

[0041] When the plastic bottle reaches the point where the production conveyor belt 9 and the feeding conveyor belt 2 are aligned, the side wall of the plastic bottle contacts the side wall of the inclined section of the first guard plate 21 and the second guard plate 22, guiding the plastic bottle onto the feeding conveyor belt 2 until the top wall of the feeding conveyor belt 2 contacts the bottom wall of the plastic bottle. Under the action of friction, the plastic bottle is moved. At this time, the plastic bottle is clamped by the straight section of the first guard plate 21 and the second guard plate 22 to prevent the plastic bottle from falling off the feeding conveyor belt 2.

[0042] Reference Figure 2 and Figure 3The limiting component 3 includes a fixedly installed first stop bar 31, which is mounted on the work frame 1 and located at the transmission end of the feeding conveyor belt 2. The length direction of the first stop bar 31 is perpendicular to the length direction of the feeding conveyor belt 2 and spans the width direction of the feeding conveyor belt 2. The side wall of the first stop bar 31 can contact the lower side wall of the plastic bottle, blocking the movement of the plastic bottle after contact, allowing the feeding conveyor belt 2 to slide relative to the plastic bottle. A third stop bar 33 is provided at the end of the feeding conveyor belt 2 away from the first stop bar 31. The third stop bar 33 is located between the second guard plate 22 and the lifting guard plate 6, and is movably mounted on the work frame 1 and driven by a cylinder mounted on the work frame 1. The length direction of the third stop bar 33 is perpendicular to the length direction of the feeding conveyor belt 2, and when extended, it spans the width direction of the feeding conveyor belt 2. The distance between the third stop bar 33 and the first stop bar 31 is equal to the diameter of N plastic bottles. The side wall of the third stop bar 33 can contact the lower side wall of the plastic bottle. After contacting the Nth plastic bottle, it prevents the (N+1)th plastic bottle from entering between the third stop bar 33 and the first stop bar 31. At this time, there are N plastic bottles neatly arranged on the feeding conveyor belt 2 inside the work frame 1. In this embodiment, N refers to the number 12.

[0043] A second stop bar 32 is also provided between the first stop bar 31 and the third stop bar 33. The second stop bar 32 is mounted on the work frame 1 and is movably mounted on the work frame 1, driven by a cylinder mounted on the work frame 1. The length direction of the second stop bar 32 is perpendicular to the length direction of the feeding conveyor belt 2, and when extended, it spans the width direction of the feeding conveyor belt 2. The distance between the second stop bar 32 and the first stop bar 31 is equal to half the diameter of a plastic bottle. The distance between the second stop bar 32 and the third stop bar 33 is greater than the diameter of N-1 plastic bottles and less than the diameter of N plastic bottles. When the second stop bar 32 extends, its sidewall can contact the lower sidewall of the plastic bottle. After contacting the N-1th plastic bottle, it prevents the Nth plastic bottle from entering between the third stop bar 33 and the second stop bar 32. At this time, there are N-1 plastic bottles neatly arranged on the feeding conveyor belt 2 inside the work frame 1.

[0044] The feeding conveyor belt 2 continuously transports plastic bottles into the work rack 1. At this time, the third stop bar 33 and the second stop bar 32 are in a retracted state. The first plastic bottle entering the work rack 1 is blocked by the first stop bar 31, and subsequent plastic bottles are blocked by the previous plastic bottle, all sliding relative to the feeding conveyor belt 2. The lifting guard plate 6 extends out of the pre-stacking platform 7, and the side walls of the first guard plate 21 and the lifting guard plate 6 are in contact with the plastic bottles, arranging multiple plastic bottles in a straight line. When the Nth plastic bottle passes the third stop bar 33, the third stop bar 33 extends to block the subsequent plastic bottles from entering, and at the same time, the lifting guard plate 6 descends below the pre-stacking platform 7. The pushing component 5 is activated, pushing the N plastic bottles arranged in a row onto the pre-stacking platform 7 together.

[0045] After one feeding cycle, the third stop bar 33 retracts, the lifting guard plate 6 rises, and the second stop bar 32 extends, blocking the first plastic bottle entering the work rack 1. When the (N-1)th plastic bottle passes the third stop bar 33, the third stop bar 33 extends, and the lifting guard plate 6 descends below the pre-stacking platform 7. The feeding assembly 5 then pushes the N-1 plastic bottles arranged in a row onto the pre-stacking platform 7. The two rows of plastic bottles are staggered, and the above steps are repeated until several rows of plastic bottles are staggered.

[0046] Reference Figure 3 and Figure 4 The feeding assembly 5 includes two lead screws 53, which are mounted on the work frame 1. The length direction of the lead screws 53 is perpendicular to the length direction of the feeding conveyor belt 2. The lead screws 53 extend from above the feeding conveyor belt 2, through the pre-stacking platform 7, to above the tray assembly 4. To smoothly transfer the staggered plastic bottles, a first feeding frame 51 and a second feeding frame 52 are provided on the lead screws 53. The first feeding frame 51 and the second feeding frame 52 are threadedly connected to one of the lead screws 53, and the second feeding frame 52 is closer to the feeding conveyor belt 2 than the first feeding frame 51. Each lead screw 53 is controlled by a servo motor. The servo motor controls the rotation of the lead screw 53, which drives the first feeding frame 51 and the second feeding frame 52 to reciprocate along the length direction of the lead screw 53 between the feeding conveyor belt 2, the pre-stacking platform 7, and the tray assembly 4.

[0047] A first pusher plate 511 is provided on the first pusher frame 51. The first pusher plate 511 is movably connected to the first pusher frame 51 via a guide rod. The first pusher plate 511 is driven by two cylinders fixed on the first pusher frame 51 and moves along the height direction of the first pusher frame 51. A second pusher plate 521 is provided on the second pusher frame 52. The second pusher plate 521 is movably connected to the second pusher frame 52 via a guide rod. The second pusher plate 521 is driven by two cylinders fixed on the second pusher frame 52 and moves along the height direction of the second pusher frame 52. The length directions of both the first pusher plate 511 and the second pusher plate 521 are parallel to the length direction of the feeding conveyor belt 2, and the lengths of both the first pusher plate 511 and the second pusher plate 521 are less than the diameter of N plastic bottles and greater than the diameter of N-1 plastic bottles. The sidewalls of the first pusher plate 511 and the second pusher plate 521 contact the sidewalls of the plastic bottles from both sides, and the first pusher plate 511 and the second pusher plate 521 together clamp several rows of plastic bottles.

[0048] To prevent the plastic bottles from separating during transport, two guide rods 71 ​​are installed on the pre-stacking platform 7 and mounted on the work frame 1. The two guide rods 71 ​​are located on opposite sides of the length of the feeding conveyor belt 2, with a distance equal to the diameter of N plastic bottles between them. The sidewalls of the guide rods 71 ​​can contact the middle of the sidewalls of the plastic bottles. The length of the guide rods 71 ​​is perpendicular to the length of the feeding conveyor belt 2. The guide rods 71 ​​extend from above the feeding conveyor belt 2, across the pre-stacking platform 7, to above the tray assembly 4. The sidewall of the guide rod 71 above the feeding conveyor belt 2 contacts the sidewall of the plastic bottle blocked by the first stop bar 31.

[0049] To facilitate the stacking of multiple layers of plastic bottles, the pallet assembly 4 includes a lifting platform 41, which is installed on the ground and located on the side of the pre-stacking platform 7 away from the feeding conveyor belt 2. The top wall of the lifting platform 41 is parallel to the horizontal plane, and the lifting platform 41 is driven by a cylinder to move intermittently in the vertical direction. A pallet 42 is placed on the top wall of the lifting platform 41. The pallet 42 is an unfolded square cardboard box, which includes a bottom plate 421 and side plates 422. The diameter of the top wall of the lifting platform 41 is equal to the diameter of the top wall of the bottom plate 421. The top wall of the bottom plate 421 can be smoothly connected to the top wall of the pre-stacking platform 7, and the guide rod 71 is located above the bottom plate 421. The side plates 422 can be folded and connected to adjacent side plates 422 to surround the bottom plate 421 and form a semi-enclosed cardboard box. The bottom wall of the plastic bottle is attached to the top wall of the bottom plate 421, and the side wall of the plastic bottle is attached to the inner side wall of the side plate 422. The bottom tray 42 is placed directly on the lifting platform 41, and the upper tray 42 is placed on the plastic bottles contained in the lower tray 42.

[0050] When the first row of N plastic bottles is neatly arranged on the feeding conveyor belt 2, the side wall of the plastic bottle blocked by the first baffle 31 contacts the side wall of the guide rod 71. At this time, the second pusher 52 is located above the first guard plate 21. The first pusher 51 is located on the side above the plastic bottles near the pre-stacking platform 7, and the lifting guard plate 6 begins to descend. The first pusher plate 511 and the second pusher plate 521 descend to the same height as the guide rod 71, clamping the first row of N plastic bottles between the first pusher plate 511 and the second pusher plate 521. When the lifting guard plate 6 is completely retracted below the pre-stacking platform 7, the two servo motors start simultaneously, driving the first pusher 51 and the second pusher 52 to move away from the feeding conveyor belt 2, so that the first pusher plate 511 and the second pusher plate 521 clamp the first row of N plastic bottles and move them along the guide rod 71 to the pre-stacking platform 7. The side walls of the first and Nth plastic bottles are respectively in contact with the guide rods 71 ​​on both sides, and the side walls of the N plastic bottles are in contact with each other. Complete the transfer of the N plastic bottles in the first row.

[0051] The first pusher frame 51 and the first pusher plate 511 remain stationary. The second pusher frame 52 moves away from the first pusher frame 51, while the second pusher plate 521 rises until it returns to above the first guard plate 21. At the same time, the third stop bar 33 retracts, causing the lifting guard plate 6 to extend. The second stop bar 32 extends, and the plastic bottle enters the working frame 1 and is blocked by the second stop bar 32. When the N-1 plastic bottles in the second row are neatly arranged on the feeding conveyor belt 2, the lifting guard plate 6 retracts, and the second pusher plate 521 descends until it contacts the side wall of the N-1 plastic bottles in the second row. Then, the second pusher frame 52 moves towards the first pusher frame 51, pushing the side wall of the N-1 plastic bottles in the second row to contact the side wall of the N plastic bottles in the first row. The two rows of plastic bottles are staggered and held by the first pusher plate 511 and the second pusher plate 521. The first pusher frame 51 and the second pusher frame 52 move away from the feeding conveyor belt 2, causing the first pusher plate 511 and the second pusher plate 521 to move the two rows of staggered plastic bottles along the guide rod 71 to the pre-stacking platform 7, completing the transfer of the N-1 plastic bottles in the second row. The above steps are repeated until multiple rows of plastic bottles are staggered on the pre-stacking platform 7.

[0052] The operator places the bottom plate 421 of the pallet 42 on the lifting platform 41, folds down the side plate 422 near the pre-stacking platform 7 and inserts it into the gap between the lifting platform 41 and the pre-stacking platform 7, with the top wall of the bottom plate 421 smoothly connected to the pre-stacking platform 7. The first pusher 51 and the second pusher 52 move towards the lifting platform 41, causing the first pusher plate 511 and the second pusher plate 521 to clamp multiple rows of staggered plastic bottles and move them along the guide rod 71 to the bottom plate 421 of the pallet 42, completing the transfer of the first layer of multiple rows of plastic bottles. Then the pusher assembly 5 resets and continues to arrange plastic bottles on the pre-stacking platform 7. The lifting platform 41 descends, and the operator resets the folded side plate 422 and attaches it to the remaining side plates 422, with the side plates 422 surrounding the plastic bottles. The operator places another pallet 42 on the lifting platform 41, adjusts the height of the lifting platform 41 and the position of the pallet 42 until the top wall of the base plate 421 is smoothly connected to the pre-stacking platform 7; after the second layer of plastic bottles is arranged, the pushing component 5 transfers the second layer of staggered plastic bottles from the pre-stacking platform 7 to the second layer pallet 42. The above steps are repeated until multiple pallets 42 filled with staggered plastic bottles are stacked on the lifting platform 41, at which point the operator packs and transfers the stacked pallets 42 as a whole.

[0053] The implementation principle of Example 1 is as follows: The operator first installs the pallet 42 next to the pre-stacking platform 7, starts the equipment, and the feeding conveyor belt 2 transports the plastic bottles on the production conveyor belt 9 to the work rack 1; the first baffle bar 31, the second baffle bar 32, and the third baffle bar 33 extend or retract alternately to limit the number and position of each row of plastic bottles; in conjunction with the extension or retraction of the lifting guard plate 6, the second pusher plate 521 pushes the plastic bottles onto the pre-stacking platform 7, while the first pusher plate 511 on the other side of the plastic bottles jointly clamps one or more rows of staggered plastic bottles; multiple rows of plastic bottles are pre-stacking on the pre-stacking platform 7, and the pusher component 5 transfers the staggered pre-stacking plastic bottles on the pre-stacking platform 7 to the pallet 42 along the guide rod 71; the lifting platform 41 descends layer by layer to collect multiple layers of pallets 42. Through the linkage of the limiting component 3, the lifting guard plate 6, and the pusher component 5, the staggered arrangement of plastic bottles is achieved, reducing the packaging volume, saving the space required for storing or transporting plastic bottles, and reducing storage and transportation costs. During the process of the operator placing the pallet 42, the plastic bottles are first pre-stacked on the pre-stacking platform 7. The entire stacking process does not need to be paused, which improves the packaging efficiency of the plastic bottles.

[0054] Example 2

[0055] Reference Figure 5 The difference between this embodiment and Embodiment 1 is that, in order to control the movement of the lifting guard plate 6, sliding grooves 61 are respectively provided at both ends of the lifting guard plate 6. The sliding grooves 61 are mounted on the work frame 1 and are vertically arranged. Slider blocks 62 are respectively installed at the bottom of both ends of the lifting guard plate 6 along its length. One end of the slider 62 is connected to the side wall along the length of the lifting guard plate 6, and the other end is inserted into the sliding groove of the corresponding sliding groove 61. The side wall of the slider 62 is in contact with the side wall along the width of the sliding groove of the sliding groove 61, and the lifting guard plate 6 reciprocates along the length of the sliding groove 61. A first wedge block 63 is provided in the middle of the lifting guard plate 6, and the right-angled wall of the first wedge block 63 is connected to the middle of the bottom wall of the lifting guard plate 6. A push rod 331 is provided on the third stop rod 33, and the push rod 331 is installed on the side wall of the third stop rod 33 near the cylinder. The push rod 331 passes under the feeding conveyor belt 2, and a second wedge block 64 is installed on the end of the push rod 331 away from the third stop rod 33. The right-angled wall of the second wedge block 64 is connected to the top wall of the push rod 331. The second wedge block 64 is located below the first wedge block 63, and the inclined surface of the first wedge block 63 is in contact with the inclined surface of the second wedge block 64.

[0056] When the third stop bar 33 is extended, the second wedge block 64 is located directly below the first wedge block 63, and the inclined surfaces of the first wedge block 63 and the second wedge block 64 are completely in contact. At this time, the slider 62 is at the bottom of the sliding trough 61, and the lifting guard plate 6 is below the feeding conveyor belt 2. When the third stop bar 33 retracts, the top rod 331 drives the second wedge block 64 to move away from the lifting guard plate 6. The second wedge block 64 applies an upward inclined pushing force to the first wedge block 63, causing the first wedge block 63 to rise and drive the lifting guard plate 6 to rise along the length of the sliding trough 61. Until the third stop bar 33 completely leaves the top of the feeding conveyor belt 2, the slider 62 moves to the top of the sliding trough 61, and the lifting guard plate 6 extends out of the top surface of the feeding conveyor belt 2. When the third stop bar 33 extends again, the second wedge block 64 moves toward the lifting guard plate 6, and the first wedge block 63 and the lifting guard plate 6 descend along the length of the sliding trough 61 under the action of gravity until the lifting guard plate 6 is completely retracted between the pre-stacking platform 7 and the feeding conveyor belt 2.

[0057] Reference Figure 6 and Figure 7 A horizontal groove 65 is formed on the top wall of the lifting guard plate 6. The length direction of the horizontal groove 65 is parallel to the length direction of the lifting guard plate 6, and the length of the horizontal groove 65 is less than the length of the lifting guard plate 6. A limit plate 8 is slidably installed in the horizontal groove 65, and the bottom wall of the limit plate 8 is in contact with the bottom wall of the horizontal groove 65. The length direction of the limit plate 8 is parallel to the length direction of the horizontal groove 65, and the length of the limit plate 8 is less than the length of the horizontal groove 65. A return spring 83 is installed on the limit plate 8. One end of the return spring 83 is connected to the end wall of the limit plate 8 near the third stop rod 33, and the other end is connected to the end wall of the horizontal groove 65 near the third stop rod 33. The return spring 83 presses the limit plate 8 against the end of the horizontal groove 65 away from the return spring 83.

[0058] A vertical groove 66 is formed on the side wall of the lifting guard plate 6 near the second baffle rod 32. The vertical groove 66 penetrates the top wall of the lifting guard plate 6 and communicates with the horizontal groove 65. The vertical groove 66 exposes the end of the limiting plate 8 near the second baffle rod 32. An inclined groove 82 is formed on the end of the limiting plate 8 exposed by the vertical groove 66. A third wedge block 321 is installed at the end of the second baffle rod 32 near the lifting guard plate 6. The right-angled wall of the third wedge block 321 is connected to the end wall of the second baffle rod 32. The third wedge block 321 can pass through the vertical groove 66 and be inserted into the horizontal groove 65. The inclined surface of the third wedge block 321 can be in contact with the inclined surface of the inclined groove 82. The third wedge block 321 moves along the width direction of the feeding conveyor belt 2, forcing the limiting plate 8 to move along the length direction of the feeding conveyor belt 2 within the horizontal groove 65, and the moving distance is equal to half the diameter of the plastic bottle.

[0059] The height of the limiting plate 8 is greater than the height of the lifting guard plate 6. N-1 guide blocks 81 are installed on the top of the side wall of the limiting plate 8 near the feeding conveyor belt 2. These N-1 guide blocks 81 are evenly distributed along the length of the limiting plate 8, and the distance between two adjacent guide blocks 81 is equal to the diameter of the plastic bottle. When the lifting guard plate 6 is fully extended from the pre-stacking platform 7, the bottom height of the guide block 81 is higher than the top height of the plastic bottle. The guide block 81 is a triangular prism. One side wall of the guide block 81 is connected to the side wall of the limiting plate 8 near the feeding conveyor belt 2, and the end of the guide block 81 away from the limiting plate 8 protrudes from the side wall of the lifting guard plate 6. The two side walls of the guide block 81 can contact the side walls of two plastic bottles respectively.

[0060] When the lifting guard plate 6 drives the limiting plate 8 to extend out of the pre-stacking platform 7, the side wall of the plastic bottle on the feeding conveyor belt 2 is in contact with the side wall of the lifting guard plate 6, and the guide block 81 is located above the side wall of the plastic bottle and does not contact the plastic bottle. When the first plastic bottle is blocked by the first stop bar 31, the second stop bar 32 is in a retracted state, and the return spring 83 presses the limiting plate 8 against the end of the transverse groove 65 away from the return spring 83. When N plastic bottles are arranged on the feeding conveyor belt 2, the lifting guard plate 6 drives the limiting plate 8 to descend. During the descent, the two side walls of the guide block 81 contact the side walls of the two plastic bottles respectively. If the position of any plastic bottle is offset, the guide block 81 corrects the position of the plastic bottle, so that the N plastic bottles are neatly arranged. Then the limiting plate 8 retracts below the pre-stacking platform 7 to facilitate the pushing assembly 5 to push the material.

[0061] When the lifting guard plate 6 drives the limiting plate 8 to extend out of the pre-stacking platform 7, and the second baffle rod 32 extends, it drives the third wedge block 321 to move closer to the lifting guard plate 6 until the inclined surface of the third wedge block 321 contacts the side wall of the inclined groove 82. The third wedge block 321 applies a pushing force to the limiting plate 8, driving the limiting plate 8 to move along the transverse groove 65 away from the second baffle rod 32 by half the diameter of the plastic bottle. At this time, the return spring 83 is compressed. A row of plastic bottles is blocked by the second baffle rod 32, and the guide block 81 is located between two adjacent plastic bottles. When N-1 plastic bottles are arranged on the feeding conveyor belt 2, the lifting guard plate 6 drives the limiting plate 8 to descend. During the descent, the two side walls of the guide block 81 contact the side walls of two adjacent plastic bottles respectively. If the position of a plastic bottle is offset, the guide block 81 corrects the position of the plastic bottle, so that the N-1 plastic bottles are neatly arranged. The second baffle rod 32 retracts, and the return spring 83 pushes the limiting plate 8 to reset. Subsequently, the limiting plate 8 retracts below the pre-stacking platform 7 to facilitate the pushing of materials by the pushing component 5.

[0062] The implementation principle of Example 2 is as follows: The third stop rod 33 retracts, forcing the lifting guard plate 6 to drive the limiting plate 8 out of the pre-stacking platform 7, with the limiting plate 8 in contact with the plastic bottles. When the second stop rod 32 is in the retracted state, the return spring 83 presses the limiting plate 8 against the inner wall of the transverse groove 65, and N plastic bottles are arranged on the feeding conveyor belt 2. When the second stop rod 32 extends, it forces the limiting plate 8 to move half the diameter of the plastic bottle in the direction of the return spring 83, and N-1 plastic bottles are arranged on the feeding conveyor belt 2. In both cases, the guide block 81 is always located between two adjacent plastic bottles. When the third stop rod 33 extends, the lifting guard plate 6 drives the limiting plate 8 to descend under the action of gravity. During the descent, the guide block 81 corrects the position of the plastic bottles, so that N or N-1 plastic bottles are neatly arranged. The third stop rod 33 is linked with the lifting guard plate 6, and the second stop rod 32 is linked with the limiting plate 8, which improves the efficiency of the staggered arrangement of plastic bottles; and reduces the cost of the equipment by reducing the number of cylinders.

[0063] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic stacking device for plastic bottles, characterized in that: The system includes a work frame (1), on which a feeding conveyor belt (2) is installed; a limiting component (3) is installed on the feeding conveyor belt (2) and is used to limit the number and position of plastic bottles on the feeding conveyor belt (2); a pre-stacking platform (7) is provided on one side of the work frame (1) in the width direction of the feeding conveyor belt (2), and a tray assembly (4) is provided on the side of the pre-stacking platform (7) away from the feeding conveyor belt (2); a pushing component (5) is also installed on the work frame (1) to pre-stacking the plastic bottles on the feeding conveyor belt (2) onto the pre-stacking platform (7). The plastic bottles pre-stacked on the pre-stacking platform (7) are pushed to the pallet assembly (4); the limiting assembly (3) includes a first stop bar (31) and a third stop bar (33), the third stop bar (33) being movably set to extend out of the side wall of the feeding conveyor belt (2) or retract; the distance between the first stop bar (31) and the third stop bar (33) is equal to the diameter of N plastic bottles; the limiting assembly (3) also includes a second stop bar (32), the second stop bar (32) being movably set to extend out of the side wall of the feeding conveyor belt (2) or retract; the distance between the first stop bar (31) and the second stop bar (32) is equal to half the diameter of a plastic bottle, the second stop bar (32) being movably set to extend out of the side wall of the feeding conveyor belt (2) or retract; the distance between the first stop bar (31) and the second stop bar (32) is equal to half the diameter of a plastic bottle, the second stop bar (32) being movably set to extend out of the side wall of the feeding conveyor belt (2) or retract; the distance between the first stop bar (31) and the second stop bar (32) is equal to the diameter of half ... 2) The distance between the third baffle bar (33) and the third baffle bar (33) is greater than the diameter of N-1 plastic bottles; a lifting guard plate (6) is also provided on the side of the feeding conveyor belt (2) near the pallet assembly (4) in the width direction. The lifting guard plate (6) is installed inside the work frame (1). The lifting guard plate (6) is movably set, extending out of the top wall of the feeding conveyor belt (2) or retracting; a limiting plate (8) is provided on the lifting guard plate (6). The length direction of the limiting plate (8) is parallel to the length direction of the lifting guard plate (6); a transverse groove (65) is opened on the top wall of the lifting guard plate (6). The limiting plate (8) is slidably set in the transverse groove (65); several guide blocks (81) are installed on the top of the limiting plate (8). A plurality of guide blocks (81) are spaced apart along the length of the limiting plate (8), and the distance between any two guide blocks (81) is equal to the diameter of the plastic bottle; a vertical groove (66) is provided on the side wall of the lifting guard plate (6) near the second baffle rod (32), the vertical groove (66) exposes part of the side wall of the limiting plate (8), and an inclined groove (82) is provided on the side wall of the limiting plate (8) near the vertical groove (66); a third wedge block (321) is installed on the second baffle rod (32), and the inclined surface of the third wedge block (321) can be in contact with the inclined surface of the inclined groove (82); the second baffle rod (32) extends out, forcing the limiting plate (8) to move away from the second baffle rod (32);A return spring (83) is provided at the end of the limiting plate (8) away from the vertical groove (66). One end of the return spring (83) is connected to the side wall of the limiting plate (8) away from the inclined groove (82), and the other end is connected to the side wall of the horizontal groove (65) away from the vertical groove (66).

2. The automatic stacking equipment for plastic bottles according to claim 1, characterized in that: The first baffle (31) is installed at the end of the feeding conveyor belt (2) and is fixedly installed; the third baffle (33) is installed on the feeding conveyor belt (2) at the end away from the first baffle (31).

3. The automatic stacking equipment for plastic bottles according to claim 2, characterized in that: The second stop bar (32) is located between the first stop bar (31) and the third stop bar (33); the second stop bar (32) is installed on the feeding conveyor belt (2) at one end near the first stop bar (31).

4. The automatic stacking equipment for plastic bottles according to claim 3, characterized in that: The feeding conveyor belt (2) is provided with a first guard plate (21) and a second guard plate (22). The first guard plate (21) is installed on the side of the feeding conveyor belt (2) away from the pallet assembly (4) in the width direction. The first guard plate (21) extends from the starting end of the feeding conveyor belt (2) to the end of the conveyor belt. The second guard plate (22) is provided at one end of the feeding conveyor belt (2) that protrudes from the work frame (1). The second guard plate (22) is installed on the side of the feeding conveyor belt (2) close to the pallet assembly (4) in the width direction. The distance between the lifting guard plate (6) and the first guard plate (21) is equal to the diameter of the plastic bottle.

5. The automatic stacking equipment for plastic bottles according to claim 4, characterized in that: The lifting guard plate (6) is provided with sliding grooves (61) at both ends. The sliding grooves (61) are installed on the work frame (1) and are vertically arranged. The lifting guard plate (6) is provided with sliders (62) at both ends. One end of the slider (62) is connected to the bottom wall of the lifting guard plate (6) and the other end is inserted into the sliding groove of the sliding groove (61). The lifting guard plate (6) moves back and forth along the length of the sliding groove (61). The lifting guard plate (6) is provided with a first wedge block (63) in the middle. A top rod (331) is installed on the third baffle rod (33). One end of the top rod (331) is connected to the third baffle rod (33) and the other end is connected to a second wedge block (64). The inclined surface of the first wedge block (63) fits against the inclined surface of the second wedge block (64). The third baffle rod (33) and the lifting guard plate (6) extend out in a staggered manner.

6. The automatic stacking equipment for plastic bottles according to claim 1, characterized in that: Guide rods (71) are provided on both sides of the pre-stacking platform (7). The guide rods (71) are installed on the work frame (1). The length direction of the guide rods (71) is perpendicular to the length direction of the feeding conveyor belt (2). The distance between the guide rods (71) is equal to the diameter of N plastic bottles. The guide rods (71) extend from above the feeding conveyor belt (2) to above the pallet assembly (4).

7. The automatic stacking equipment for plastic bottles according to claim 6, characterized in that: The feeding assembly (5) includes a first feeding frame (51), a second feeding frame (52), and two lead screws (53). The lead screws (53) are installed above the feeding conveyor belt (2) and the tray assembly (4), and the length direction of the lead screws (53) is perpendicular to the length direction of the feeding conveyor belt (2). The first feeding frame (51) and the second feeding frame (52) are respectively threaded to one of the lead screws (53). The rotation of the lead screws (53) controls the first feeding frame (51) and the second feeding frame (52) to reciprocate along the length direction of the lead screws (53). The second pusher (52) is located between the first pusher (51) and the feeding conveyor belt (2); the first pusher (511) is movably mounted on the first pusher (51) and the first pusher (511) moves back and forth along the height direction of the first pusher (51); the second pusher (521) is movably mounted on the second pusher (52) and the second pusher (521) moves back and forth along the height direction of the second pusher (52); the first pusher (511) and the second pusher (521) can contact the side wall of the plastic bottle.

8. The automatic stacking equipment for plastic bottles according to claim 7, characterized in that: The pallet assembly (4) includes a lifting platform (41) and several pallets (42). The lifting platform (41) is installed on the side of the pre-stacking platform (7) away from the feeding conveyor belt (2). The lifting platform (41) moves intermittently in the vertical direction. The pallets (42) can be placed directly on the lifting platform (41) or on the lower pallets (42) filled with plastic bottles. The top wall of the pallet (42) is smoothly connected to the top wall of the pre-stacking platform (7).

Images