Automatic food packaging box replacing device

Abstract

The invention discloses an automatic food packaging box replacing device, and relates to the technical field of conveying, the automatic food packaging box replacing device is characterized in that four through grooves are formed in a rotary disc in a circumferential array mode, and U-shaped plates are arranged around the through grooves; the placing frame comprises a bottom frame, four stand columns and a supporting plate, a discharging groove is formed in the center of the bottom frame, a gear is arranged at the top of the first end of the supporting plate, the first end of the supporting plate is rotationally connected to one stand column, a torsional spring is arranged at the joint of the first end of the supporting plate and the stand column, and the second end of the supporting plate is located above the discharging groove; the first conveying channel is used for sequentially conveying the containing frames where the packaging boxes are stacked into the corresponding U-shaped plates, the releasing mechanism comprises a first telescopic rod and a rack connected with the first telescopic rod and is used for rotating a gear so that the supporting plate can rotate towards the outer portion of the rotary disc, and then the stacked packaging boxes can integrally fall into the box separating mechanism, and a push-pull mechanism is arranged at the position of the second conveying channel. And the moving mechanism is used for moving the empty placing rack to the second conveying channel. The stacked packaging boxes can be automatically conveyed and transferred to the box separation mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying, and particularly relates to an automatic replenishment device for food packaging boxes. Background Art

[0002] Taking the packaging of prefabricated rice as an example, as Figure 1 shown, the meal box separation and conveying device includes a platform, a meal box limiting frame, a meal box separation mechanism and a conveying mechanism. The platform is provided with a through groove penetrating through itself up and down. The meal box limiting frame is installed above the through groove, the meal box separation mechanism is installed below the through groove, and the conveying mechanism is located below the meal box separation mechanism. The meal box limiting frame includes a rectangular base and limiting columns arranged around the rectangular base. The area surrounded by the four limiting columns and the through groove is used for stacking meal boxes. The meal box separation mechanism is used to sequentially separate the stacked meal boxes, and the conveying mechanism conveys the separated meal boxes to the loading equipment of the prefabricated rice. The problem with this prior art solution is that the meal boxes in the meal box limiting frame need to be replenished manually, with low efficiency. If not replenished in time, it will affect the entire packaging process. Summary of the Invention

[0003] To solve the deficiencies of the prior art, the present invention provides an automatic replenishment device for food packaging boxes, which can automatically convey the packaging boxes and can automatically convey and transfer the stacked packaging boxes to the box separation mechanism.

[0004] To achieve the purpose of the present invention, the following scheme is proposed: An automatic replenishment device for food packaging boxes includes a box separation mechanism, a turntable, a plurality of placement racks, a first conveying channel, a release mechanism and a second conveying channel.

[0005] The turntable is arranged on the top of the power box, and the power box is used to drive the turntable. Four through grooves are circumferentially arrayed on the turntable. A U-shaped plate is arranged around the through groove, and the opening of the U-shaped plate faces outside the turntable. The box separation mechanism is arranged on the bracket and is located below one of the through grooves.

[0006] The placement rack includes a bottom frame, four columns and a tray. A blanking groove is provided at the center of the bottom frame. The two side faces of the bottom frame are symmetric arc surfaces, and the radius of the arc surface is the same as the radius of the turntable. The four columns are rectangularly arrayed on the top of the bottom frame. A gear is provided at the top of the first end of the tray. The first end of the tray is rotatably connected to one of the columns, and a torsion spring is provided at the connection between the two. The gear is rotationally engaged with the column. The second end of the tray is located above the blanking groove and is used to support the stacked packaging boxes.

[0007] The first conveying channel, the release mechanism and the second conveying channel are all arranged on the outer circumference of the turntable, and the positions of the three respectively correspond to a U-shaped plate.

[0008] Among them, the first conveyor is used to sequentially convey the placement racks stacked with packaging boxes into the corresponding U-shaped plates, and the blanking chute is directly opposite to the through groove. The upright column connected to the pallet is located at the opening of the U-shaped plate, one of the arc surfaces is aligned with the outer wall of the turntable, and the other arc surface and the two end faces of the bottom frame are respectively in close contact with the three inner walls of the U-shaped plate.

[0009] Among them, the release mechanism includes a first telescopic rod and a rack connected to its telescopic end. The first telescopic rod is arranged on the first support seat. When its telescopic end extends, it is used to move the rack, prompting the gear on the corresponding placement rack to rotate, so that the pallet rotates outward relative to the turntable, and the stacked packaging boxes fall as a whole into the box separation mechanism. The box separation mechanism is used to sequentially separate the packaging boxes.

[0010] Among them, a pushing and pulling mechanism is provided at the second conveyor. The pushing and pulling mechanism is used to move the empty placement rack in the corresponding U-shaped plate onto the second conveyor.

[0011] The beneficial effects of the present invention are as follows: The placement rack has a clever structure and can hold a stack of packaging boxes, facilitating the conveyance of the placement rack by the first conveyor; through the structural cooperation of the first conveyor, the turntable and the placement rack, the first conveyor can automatically convey the placement rack onto the turntable, and the turntable can also automatically rotate the placement rack to other workstations; at the box separation mechanism, the release mechanism can rotate the pallet outward, so that the packaging boxes in the placement rack fall as a whole into the box separation mechanism; at the second conveyor, the empty placement rack can be automatically separated from the turntable through the pushing and pulling mechanism. The present invention realizes the automatic conveyance of stacked packaging boxes and automatically transfers the stacked packaging boxes into the box separation mechanism without manual participation, improving the efficiency. Description of the Drawings

[0012] Figure 1 Shows the structure diagram of the lunch box separation and conveyance device in the prior art; Figure 2 Shows the structure diagram of the automatic replenishment device; Figure 3 Shows the top view of the automatic replenishment device; Figure 4 is Figure 3 the partial enlarged view at A in Figure 5 is Figure 3 the partial enlarged view at B in Figure 6 Shows the structure diagram of the placement rack; Figure 7 Shows the top view of the turntable; Figure 8 Shows the structure diagram of the first conveyor conveying the placement rack to the corresponding U-shaped plate; Figure 9 is Figure 8 the partial enlarged view at C in Figure 10 The side view of the lock block, adjusting block and cross plate is shown; Figure 11 The structure diagram of the push-pull mechanism is shown; Figure 12 is Figure 11 The partial enlarged view at position D in Figure 13 The structure diagrams of the box separation mechanism, supporting mechanism, guiding plate and conveying table at the release mechanism are shown; Figure 14 The rear view of the box separation mechanism, supporting mechanism, guiding plate and conveying table is shown; Reference numerals: box separation mechanism - 9, turntable - 1, power box - 11, through groove - 12, U-shaped plate - 13, bracket - 91, placement rack - 2, bottom frame - 21, column - 22, pallet - 23, blanking groove - 211, arc surface - 212, gear - 24, first conveying channel - 3, release mechanism - 6, second conveying channel - 4, first telescopic rod - 61, rack - 62, first support base - 63, push-pull mechanism - 7, groove - 15, second support base - 74, strip-shaped groove - 741, second telescopic rod - 71, pull rod - 72, pull block - 73, vertical plate - 711, first inclined surface - 731, installation groove - 14, lock - 5, lock block - 51, adjusting block - 52, cross plate - 53, lock hole - 213, second inclined surface - 511, unlocking rod - 75, third inclined surface - 751, adjusting groove - 521, annular plate - 231, notch - 232, supporting mechanism - 8, lifting rod - 81, circular tray - 82, conveying table - 10, guiding plate - 92, baffle - 93, avoidance groove - 94. Detailed implementation manners

[0013] As Figure 2 , Figure 13 shown, this embodiment provides an automatic replenishment device for food packaging boxes, including a box separation mechanism 9, a turntable 1, a plurality of placement racks 2, a first conveying channel 3, a release mechanism 6, a second conveying channel 4 and a push-pull mechanism 7.

[0014] Specifically, as Figure 2 , Figure 7 shown, the turntable 1 is arranged on the top of the power box 11. The power box 11 is provided with a motor for driving the turntable 1. Four through grooves 12 are arranged in a circumferential array on the turntable 1. The size of the through grooves 12 should allow the packaging boxes to pass through. A U-shaped plate 13 is arranged around each through groove 12. The opening of the U-shaped plate 13 faces outside the turntable 1. Three inner walls of the U-shaped plate 13 form steps with the through groove 12. The function of the steps is to support the placement rack 2.

[0015] Specifically, as Figure 4 , Figure 6As shown, the placement rack 2 includes a bottom frame 21, four columns 22 and a tray 23. A blanking groove 211 is provided at the center of the bottom frame 21. The blanking groove 211 penetrates the bottom frame 21 in the vertical direction. The two side surfaces of the bottom frame 21 are symmetric arc surfaces 212, and the radius of the arc surface 212 is the same as the radius of the turntable 1. The four columns 22 are arranged in a rectangular array on the top of the bottom frame 21. A gear 24 is provided at the top of the first end of the tray 23. The first end of the tray 23 is rotatably connected to one of the columns 22, and the gear 24 is rotatably fitted to the column 22. A torsion spring is provided at the connection between the first end of the tray 23 and the column 22. The function of the torsion spring is to keep the tray 23 in the state as shown in Figure 6 . The second end of the tray 23 is located above the blanking groove 211. The tray 23 is used to support the stacked packaging boxes. The four columns 22 play a role in restricting the packaging boxes. The size of the blanking groove 211 should allow the packaging boxes to pass through.

[0016] Specifically, as shown in Figure 2 and Figure 7 , the first conveying channel 3, the releasing mechanism 6 and the second conveying channel 4 are all arranged on the outer periphery of the turntable 1, and their positions respectively correspond to a U-shaped plate 13.

[0017] As shown in Figure 2 and Figure 4 and Figure 6 and Figure 7 , the first conveying channel 3 is arranged on the top of the third support base. The first conveying channel 3 adopts a roller-type conveying method. Roller arrays are provided on both inner walls of it, and are used to sequentially convey the placement rack 2 stacked with packaging boxes into the corresponding U-shaped plate 13. One U-shaped plate 13 can accommodate one placement rack 2. After the placement rack 2 is conveyed into the U-shaped plate 13, the blanking groove 211 is directly opposite to the through groove 12. The column 22 connected to the tray 23 is located at the opening of the U-shaped plate 13. One arc surface 212 of the bottom frame 21 is aligned with the outer wall of the turntable 1, and the other arc surface 212 and the two end surfaces of the bottom frame 21 are respectively close to the three inner walls of the U-shaped plate 13. The purpose of this design is: taking Figure 4 as an example, the bottom frame 21 in the U-shaped plate 13 can intercept the bottom frame 21 on the first conveying channel 3, isolate the placement rack 2 on the first conveying channel 3 outside the turntable 1, and ensure that the placement rack 2 on the first conveying channel 3 will not hinder the rotation of the turntable 1.

[0018] Specifically, as shown in Figure 6 and Figure 7 and Figure 13As shown in the figure, the box separation mechanism 9 is provided on the bracket 91. The box separation mechanism 9 is located at the release mechanism 6 and is located below one of the through slots 12. The release mechanism 6 is used to rotate the pallet 23 in the placement rack 2 to the outside of the placement rack 2, so that the stacked packaging boxes in the placement rack 2 fall as a whole into the box separation mechanism 9. The box separation mechanism 9 corresponds to the lunch box separation mechanism mentioned in the background art and is used to separate the packaging boxes in sequence. The box separation mechanism 9 belongs to the prior art, and its structure and principle will not be elaborated in detail here.

[0019] Specifically, as Figure 2 , Figure 3 , Figure 5 shown, the release mechanism 6 includes a first telescopic rod 61 and a rack 62 connected to its telescopic end. The first telescopic rod 61 is provided on the first support seat 63, and its telescopic end is connected to the rack 62. The rack 62 faces the corresponding U-shaped plate 13. The first telescopic rod 61 can be driven by a cylinder or an oil cylinder. When the telescopic end of the first telescopic rod 61 extends, it is used to move the rack 62, prompting the gear 24 on the corresponding placement rack 2 to rotate, so that the pallet 23 rotates outward relative to the placement rack 2.

[0020] Specifically, as Figure 2 , Figure 3 shown, the second conveying channel 4 is provided on the top of the second support seat 74. The second conveying channel 4 adopts a roller-type conveying method, and rollers are arranged in an array on both inner walls thereof. A pushing and pulling mechanism 7 is provided at the second conveying channel 4. The pushing and pulling mechanism 7 is used to move the placement rack 2 with an empty interior in the corresponding U-shaped plate 13 onto the second conveying channel 4. There are many ways to implement the pushing and pulling mechanism 7. For example, the placement rack 2 is clamped by a clamping jaw, and then the placement rack 2 is translated onto the second conveying channel 4 under the action of a pneumatic telescopic rod.

[0021] Usage method of the above device: Pre-stack multiple packaging boxes in the placement racks 2 in advance; The first conveying channel 3 sequentially conveys the placement racks 2 stacked with packaging boxes into the corresponding U-shaped plates 13. Taking the first placement rack 2 as an example, after the first placement rack 2 is conveyed into the U-shaped plate 13, the turntable 1 rotates 90°; After a period of time, the turntable 1 rotates 90° again. At this time, the first placement rack 2 is located at the release mechanism 6. The first telescopic rod 61 moves the rack 62 in the direction of the first placement rack 2, prompting the gear 24 on the first placement rack 2 to rotate, so that the pallet 23 rotates outward relative to the placement rack 2, and the stacked packaging boxes in the placement rack 2 fall as a whole into the box separation mechanism 9; The box separation mechanism 9 sequentially separates the stacked packaging boxes into individual packaging boxes; After the separation of the packaging boxes is completed, the turntable 1 rotates 90° again. At this time, the first placement rack 2 is located at the second conveying channel 4, and the pushing and pulling mechanism 7 moves the first placement rack 2 onto the second conveying channel 4.

[0022] As a preferred solution, the specific structure of the push-pull mechanism 7 in this embodiment is as follows: First, the structure of the turntable 1 is improved, as Figure 7 shown, eight grooves 15 are provided along the circumferential direction on the top of the turntable 1. Two adjacent grooves 15 form a group and are located at the openings of the corresponding U-shaped plates 13. The inner ends of the grooves 15 communicate with the corresponding through grooves 12, and the outer ends of the grooves 15 completely penetrate the side wall of the turntable 1.

[0023] As Figure 3 , Figure 11 , Figure 12 shown, the push-pull mechanism 7 is arranged in the strip-shaped groove 741 on the top of the second support base 74. The push-pull mechanism 7 includes a second telescopic rod 71, two pull rods 72 and two pull blocks 73. The telescopic end of the second telescopic rod 71 is connected to the outside of the vertical plate 711. The two pull rods 72 are both horizontally arranged inside the vertical plate 711. A rectangular block is provided at the inner end of the pull rod 72. The inner end of the pull rod 72 refers to the end facing the turntable 1. The top surface of the pull rod 72 is flush with the top surface of the rectangular block, and their bottom surfaces are also flush. One rectangular block aligns with one groove 15. A rectangular groove is provided at the top of the rectangular block. A first spring is provided in the rectangular groove. The top of the first spring is connected to the pull block 73. The pull block 73 is slidably matched with the rectangular groove. The pull block 73 can be retracted into the rectangular groove when under pressure. The side of the top end of the pull block 73 facing the turntable 1 is set as a first inclined surface 731. The second telescopic rod 71 is driven by a cylinder or an oil cylinder. When the telescopic end of the second telescopic rod 71 extends, it is used to make the rectangular block pass through the corresponding groove 15.

[0024] The method for the push-pull mechanism 7 to move the placement rack 2 onto the second conveying path 4 is as follows: The second telescopic rod 71 extends, so that the two rectangular blocks pass through the corresponding grooves 15. During this process, the first inclined surface 731 of the pull block 73 is squeezed by the bottom frame 21, prompting the pull block 73 to retract into the rectangular groove; when the pull block 73 passes through the groove 15, the pull block 73 bounces under the action of its own first spring. At this time, the pull block 73 is located inside the bottom frame 21; then the second telescopic rod 71 shortens and resets, and the two pull blocks 73 will pull the bottom frame 21 towards the second conveying path 4. When the bottom frame 21 touches the rollers of the second conveying path 4, all the rollers run synchronously, so that the placement rack 2 is completely separated from the turntable 1.

[0025] Here, it should be noted that when the two pull blocks 73 pull the bottom frame 21 towards the second conveying path 4, precisely speaking, the pull blocks 73 act on the outer side frame of the bottom frame 21. When all the rollers run synchronously and the placement rack 2 is separated from the turntable 1, the inner side frame of the bottom frame 21 will gradually approach the two pull blocks 73, and then squeeze the two pull blocks 73, causing the pull blocks 73 to retract into the rectangular groove, ensuring that the placement rack 2 can be smoothly separated from the turntable 1.

[0026] As mentioned above, the first conveyor 3 sequentially conveys the placement racks 2 stacked with packaging boxes to the corresponding U-shaped plates 13, but does not fix the placement racks 2 in the U-shaped plates 13. A further optimized solution is as follows: like Figures 7 - 10 As shown, there are four mounting grooves 14 arranged in a circular array on the turntable 1, and the mounting grooves 14 completely penetrate the turntable 1 from top to bottom. The mounting grooves 14 are located between two grooves 15 in a group, and a locking member 5 is provided at each mounting groove 14. The locking member 5 includes a locking block 51 and an adjusting block 52 arranged at the bottom thereof. A horizontal plate 53 is arranged at the bottom of the adjusting block 52, and the tops of both ends of the horizontal plate 53 are respectively connected to the turntable 1 through a second spring. The top surface of the adjusting block 52 is tightly attached to the bottom surface of the turntable 1, and the locking block 51 slides up and down in the mounting groove 14, a locking hole 213 is provided at a position corresponding to the bottom frame 21 and the mounting groove 14, and a second inclined surface 511 is provided on the side of the top of the locking block 51 facing the outside of the turntable 1. In the process of the first conveying channel 3 conveying the placement rack 2 to the U-shaped plate 13, the second inclined surface 511 is first squeezed by the bottom frame 21, prompting the locking block 51 to shrink into the mounting groove 14. When the placement rack 2 is completely located in the U-shaped plate 13, the locking block 51 bounces up into the locking hole 213 under the action of the second spring, thereby locking the placement rack 2.

[0027] One point is explained here: only one locking hole 213 is provided on the bottom frame 21 . When the placement rack 2 is transported by the first transport path 3 , it should be noted that the locking holes 213 of all bottom frames 21 must be oriented in the same direction.

[0028] The above solution adds a lock 5 for locking the placement rack 2, so an unlocking component needs to be provided at the second conveying path 4. The specific implementation method is as follows: Figure 3 , Figure 11 , Figure 12 As shown, the push-pull mechanism 7 also includes an unlocking rod 75, which is horizontally arranged on the inner side of the vertical plate 711, and the bottom of the inner end of the unlocking rod 75 is set as a third inclined surface 751. The inner end of the unlocking rod 75 refers to the end facing the turntable 1, and the adjustment block 52 is provided with an adjustment groove 521. In the direction along the radius of the turntable 1, the adjustment groove 521 passes through the adjustment block 52, and the bottom surface of the adjustment groove 521 is set as a fourth inclined surface, and the fourth inclined surface is parallel to the third inclined surface 751, and the fourth inclined surface is aligned with the third inclined surface 751, the second conveying path 4.

[0029] Unlocking method: When the second telescopic rod 71 is extended, the unlocking rod 75 can be inserted into the corresponding adjustment groove 521, and the squeezing effect of the third inclined surface 751 on the fourth inclined surface causes the locking block 51 to retract downward into the installation groove 14, thereby achieving unlocking.

[0030] The push-pull mechanism 7 provided in this embodiment has an ingenious structure, which can not only realize unlocking, but also pull the placement rack 2 onto the second conveying path 4 to make the placement rack 2 separate from the turntable 1. The specific method is: The second telescopic rod 71 extends, and the unlocking rod 75 first inserts into the adjustment groove 521, prompting the locking block 51 to retract downward into the installation groove 14 to achieve unlocking. Then, the two rectangular blocks pass through the corresponding grooves 15. Then, the second telescopic rod 71 shortens, and the two pulling blocks 73 pull the bottom frame 21 towards the second conveying channel 4. When the bottom frame 21 touches the rollers of the second conveying channel 4, the second telescopic rod 71 stops briefly. At this time, the locking block 51 still retracts into the installation groove 14, and all the rollers run synchronously. After the placement rack 2 is completely separated from the turntable 1, the second telescopic rod 71 continues to shorten and reset.

[0031] As mentioned above, the first telescopic rod 61 moves the rack 62 towards the placement rack 2, prompting the gear 24 on the placement rack 2 to rotate, so that the tray 23 rotates outward from the placement rack 2, and the stacked packaging boxes in the placement rack 2 fall as a whole into the box separation mechanism 9. To improve the stability of the overall fall of the packaging boxes, the following measures are taken in this embodiment: As Figure 6 shown, the second end of the tray 23 is provided with an annular plate 231. The center of the annular plate 231 is provided with a circular groove, and the annular plate 231 is provided with a notch 232 at a specific position. The position and function of the notch 232 are described in the following paragraph.

[0032] As Figure 3 、 Figure 6 、 Figure 13 shown, the device further includes a supporting mechanism 8 provided at the box separation mechanism 9. The supporting mechanism 8 includes a lifting rod 81 and a circular tray 82 provided at its top. The movable end of the lifting rod 81 passes upward through the central channel of the box separation mechanism 9. The lifting rod 81 is driven by a cylinder or an oil cylinder to move the circular tray 82 up and down. The top surface of the circular tray 82 is lower than the turntable 1, and the circular tray 82 is located below the circular groove of the corresponding annular plate 231. When the circular tray 82 moves up, it is used to support the stacked packaging boxes; when the tray 23 rotates outward from the turntable 1, the notch 232 is used to avoid the circular tray 82.

[0033] Furthermore, as Figure 6 、 Figure 13 、 Figure 14 shown, the device further includes a conveying table 10 and a guiding plate 92 provided at the box separation mechanism 9. The first end of the guiding plate 92 is located below the box separation mechanism 9, and the second end of the guiding plate 92 extends obliquely downward to the table surface of the conveying table 10, for sliding the packaging boxes separated by the box separation mechanism 9 down onto the conveying table 10. Both sides of the guiding plate 92 are provided with baffles 93, and the guiding plate 92 is provided with an avoidance groove 94 that penetrates through itself up and down. When the circular tray 82 moves down, the avoidance groove 94 is used to avoid the circular tray 82.

[0034] Usage method: The lifting rod 81 moves the circular tray 82 upward until the circular tray 82 touches the packaging box; the first telescopic rod 61 moves the rack 62 in the direction of the placement rack 2, prompting the gear 24 on the placement rack 2 to rotate, so that the pallet 23 rotates outward from the placement rack 2 and maintains this state continuously; the lifting rod 81 moves the circular tray 82 downward, and the stacked packaging boxes move downward with the circular tray 82 until the packaging box falls into the box separation mechanism 9; the lifting rod 81 continues to move the circular tray 82 downward, and the circular tray 82 passes through the avoidance groove 94 downward and then stops moving; the box separation mechanism 9 starts to operate, and the separated packaging boxes first fall onto the guide plate 92 and then slide onto the conveying table 10; when a stack of packaging boxes is separated, the first telescopic rod 61 retracts the rack 62, and the pallet 23 moves back into the placement rack 2 under the action of the torsion spring.

[0035] The above embodiments are only used to illustrate the technical idea and characteristics of the present invention, and do not mean to be the only or limit the present invention. Those skilled in the art should understand that without departing from the scope of the present invention, various changes or equivalent replacements made to the present invention all fall within the scope of protection of the present invention.

Claims

1. An automatic replenishment device for a food packaging box, comprising a box separation mechanism (9), characterized in that, Further included are: A turntable (1) with four through slots (12) arranged in a circumferential array on it. A U-shaped plate (13) is provided around the through slot (12), and the opening of the U-shaped plate (13) faces outside the turntable (1). A box separation mechanism (9) is arranged on a bracket (91) and is located below one of the through slots (12); Multiple placement racks (2), and the placement rack (2) includes a bottom frame (21), four upright columns (22) and a support plate (23). A blanking slot (211) is provided at the center of the bottom frame (21). Both side surfaces of the bottom frame (21) are symmetric arc surfaces (212), and the radius of the arc surface (212) is the same as the radius of the turntable (1). The four upright columns (22) are arranged in a rectangular array on the top of the bottom frame (21). A gear (24) is provided at the top of the first end of the support plate (23). The first end of the support plate (23) is rotatably connected to one of the upright columns (22), and a torsion spring is provided at the connection between the two. The gear (24) is rotationally engaged with the upright column (22). The second end of the support plate (23) is located above the blanking slot (211) and is used to support the stacked packaging boxes; A first conveying channel (3), a release mechanism (6) and a second conveying channel (4) are provided on the outer periphery of the turntable (1), and the positions of the three respectively correspond to a U-shaped plate (13); Among them, the first conveying channel (3) is used to sequentially convey the placement racks (2) stacked with packaging boxes into the corresponding U-shaped plates (13). The blanking slot (211) is aligned with the through slot (12). The upright column (22) connected to the support plate (23) is located at the opening of the U-shaped plate (13). One of the arc surfaces (212) is aligned with the outer wall of the turntable (1), and the other arc surface (212) and both end faces of the bottom frame (21) are respectively in close contact with the three inner walls of the U-shaped plate (13); Among them, the release mechanism (6) includes a first telescopic rod (61) and a rack (62) connected to its telescopic end. The first telescopic rod (61) is arranged on a first support seat (63), and when its telescopic end extends, it is used to move the rack (62) to cause the gear (24) on the corresponding placement rack (2) to rotate, so that the support plate (23) rotates outward from the turntable (1), and the stacked packaging boxes fall into the box separation mechanism (9) as a whole. The box separation mechanism (9) is used to sequentially separate the packaging boxes; Among them, a pushing and pulling mechanism (7) is provided at the second conveying channel (4), and the pushing and pulling mechanism (7) is used to move the empty placement rack (2) in the corresponding U-shaped plate (13) onto the second conveying channel (4).

2. The automatic replenishment device for food packaging boxes according to claim 1, characterized in that Both the first conveying channel (3) and the second conveying channel (4) adopt a roller-type conveying method. The second conveying channel (4) is arranged on the top of a second support seat (74), and rollers are arrayed on both inner walls of it.

3. The automatic replenishment device for food packaging boxes according to claim 2, wherein Eight grooves (15) are provided along the circumferential direction at the top of the turntable (1). Two adjacent grooves (15) form a group and are located at the openings of the corresponding U-shaped plates (13). The inner ends of the grooves (15) communicate with the corresponding through grooves (12), and the outer ends completely penetrate through the side wall of the turntable (1). The push-pull mechanism (7) is arranged in the strip-shaped groove (741) at the top of the second support seat (74), and includes a second telescopic rod (71), two pull rods (72) and two pull blocks (73). The telescopic end of the second telescopic rod (71) is connected to the outside of the vertical plate (711). The two pull rods (72) are both horizontally arranged inside the vertical plate (711). A rectangular block is provided at the inner end of the pull rod (72), a rectangular groove is provided at the top of the rectangular block, a first spring is arranged in the rectangular groove, and the top of the first spring is connected to the pull block (73). The side of the top end of the pull block (73) facing the turntable (1) is set as the first inclined surface (731). When the second telescopic rod (71) extends, it is used to make the rectangular block pass through the corresponding groove (15), and during this process, the pull block (73) is squeezed into the rectangular groove by the bottom frame (21).

4. The automatic replenishment device for food packaging boxes according to claim 3, characterized in that, Four mounting grooves (14) are arranged in a circumferential array on the turntable (1). The mounting grooves (14) penetrate through the turntable (1) completely up and down. The mounting grooves (14) are located between two grooves (15) in a group. A locking member (5) is provided at each mounting groove (14). The locking member (5) includes a locking block (51) and an adjusting block (52) arranged at its bottom. A horizontal plate (53) is provided at the bottom of the adjusting block (52). The tops of both ends of the horizontal plate (53) are respectively connected to the turntable (1) through second springs. The top surface of the adjusting block (52) is in close contact with the bottom surface of the turntable (1). The locking block (51) slides up and down in the mounting groove (14). A locking hole (213) is provided at the position of the bottom frame (21) corresponding to the mounting groove (14). The side of the top end of the locking block (51) facing the outside of the turntable (1) is set as the second inclined surface (511). When the placing rack (2) is conveyed into the U-shaped plate (13), the second inclined surface (511) is located in the locking hole (213) for locking the placing rack (2).

5. The automatic replenishment device for food packaging boxes according to claim 4, wherein The push-pull mechanism (7) further includes an unlocking rod (75). The unlocking rod (75) is horizontally arranged inside the vertical plate (711). The bottom of the inner end of the unlocking rod (75) is set as the third inclined surface (751). The adjusting block (52) is provided with an adjusting groove (521). In the radial direction of the turntable (1), the adjusting groove (521) penetrates through the adjusting block (52), and the bottom surface of the adjusting groove (521) is set as the fourth inclined surface. At the second conveying path (4), when the telescopic end of the second telescopic rod (71) extends, it is used to make the unlocking rod (75) insert into the corresponding adjusting groove (521), and the locking block (51) is forced to shrink downward into the mounting groove (14) through the extrusion of the third inclined surface (751) on the fourth inclined surface; when the push-pull mechanism (7) pulls the empty placing rack (2) to the second conveying path (4), the locking block (51) is still located in the mounting groove (14).

6. The automatic replenishment device for food packaging boxes according to claim 1, wherein The second end of the pallet (23) is provided with an annular plate (231). A circular groove is provided at the center of the annular plate (231). The annular plate (231) is provided with a notch (232).

7. The automatic replenishment device for food packaging boxes according to claim 6, characterized in that It further includes a supporting mechanism (8) disposed at the cartridge separating mechanism (9). The supporting mechanism (8) includes a lifting rod (81) and a circular tray (82) disposed at its top. The movable end of the lifting rod (81) passes upward through the central channel of the cartridge separating mechanism (9). The top surface of the circular tray (82) is lower than that of the turntable (1). The circular tray (82) is located below the circular groove of the corresponding annular plate (231). When the circular tray (82) moves upward, it is used to support the stacked packaging boxes. When the tray (23) rotates outward towards the turntable (1), the notch (232) is used to avoid the circular tray (82).

8. The automatic replenishment device for food packaging boxes according to claim 7, characterized in that, It further includes a conveying table (10) and a guiding plate (92) disposed at the cartridge separating mechanism (9). The first end of the guiding plate (92) is located below the cartridge separating mechanism (9). The second end of the guiding plate (92) extends obliquely downward to the table surface of the conveying table (10) and is used to slide the packaging boxes separated by the cartridge separating mechanism (9) onto the conveying table (10). Baffles (93) are provided on both sides of the guiding plate (92). The guiding plate (92) is provided with an avoidance groove (94) penetrating through itself vertically. When the circular tray (82) moves downward, the avoidance groove (94) is used to avoid the circular tray (82).

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