Automatic replenishment device for food packaging boxes

Abstract

The present invention discloses an automatic replenishment device for food packaging boxes, which relates to the field of conveying technology and includes: a turntable with four through-grooves in a circular array, with U-shaped plates arranged around the through-grooves; a storage rack including a bottom frame, four columns, and a support plate; a material discharge chute at the center of the bottom frame; a gear at the top of the first end of the support plate, the first end of the support plate being rotatably connected to one of the columns, and a torsion spring being provided at the connection between the two; and the second end of the support plate being located above the material discharge chute; a first conveying path for sequentially conveying the storage racks with stacked packaging boxes into corresponding U-shaped plates; a release mechanism including a first telescopic rod and a connected rack for rotating the gear to rotate the support plate outward from the turntable, thereby causing the stacked packaging boxes to fall as a whole into a box separation mechanism; a second conveying path provided with a push-pull mechanism for moving an empty storage rack onto the second conveying path. The present invention can automatically convey and transfer stacked packaging boxes to the box separation mechanism.

Description

Technical Field

[0001] The present invention relates to the field of conveying technology, in particular to an automatic replenishing device for food packaging boxes. Background Art

[0002] Take the packaging of pre-made rice as an example. Figure 1 As shown, the lunch box separation and conveying device includes a platform, a lunch box limiting frame, a lunch box separation mechanism, and a conveying mechanism. The platform is provided with a through slot running through it from top to bottom. The lunch box limiting frame is installed above the through slot, the lunch box separation mechanism is installed below the through slot, and the conveying mechanism is located below the lunch box separation mechanism. The lunch box limiting frame includes a rectangular base and limiting posts arranged around the rectangular base. The area enclosed by the four limiting posts and the through slot is used to stack lunch boxes. The lunch box separation mechanism is used to separate the stacked lunch boxes in sequence, and the conveying mechanism transports the separated lunch boxes to the pre-cooked rice loading equipment. The problem with this existing technical solution is that the lunch boxes in the lunch box limiting frame need to be manually replenished, which is inefficient. If the replenishment is not timely, it will affect the entire packaging process. Summary of the Invention

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

[0004] In order to achieve the purpose of the present invention, the following scheme is proposed:

[0005] A food packaging box automatic replenishment device comprises a box separation mechanism, a turntable, a plurality of placement racks, a first conveying path, a release mechanism and a second conveying path.

[0006] The turntable is located on the top of the power box, which is used to drive the turntable. There are four through-grooves in a circular array on the turntable. A U-shaped plate is provided around the through-grooves, and the opening of the U-shaped plate faces the outside of the turntable. The box separation mechanism is provided on the bracket and is located below one of the through-grooves.

[0007] The placement rack includes a base frame, four columns and a support plate. A material discharge trough is provided at the center of the base frame. The two side surfaces of the base frame are set to symmetrical arc surfaces. The radius of the arc surface is consistent with the radius of the turntable. The four columns are arranged in a rectangular array on the top of the base frame. A gear is provided on the top of the first end of the support plate. The first end of the support plate is rotatably connected to one of the columns, and a torsion spring is provided at the connection between the two. The gear rotates to cooperate with the column. The second end of the support plate is located above the material discharge trough and is used to support the stacked packaging boxes.

[0008] The first conveying path, the release mechanism and the second conveying path are all arranged on the outer periphery of the turntable, and the positions of the three correspond to a U-shaped plate respectively.

[0009] Among them, the first conveyor lane is used to transport the placement racks with stacked packaging boxes to the corresponding U-shaped plates in sequence, and the unloading trough is opposite to the through trough. The 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 surfaces of the bottom frame are respectively close to the three inner walls of the U-shaped plate.

[0010] 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 the telescopic end is extended, it is used to move the rack, prompting the gear on the corresponding placement rack to rotate, so that the tray rotates toward the outside of the turntable, and the stacked packaging boxes fall as a whole into the box separation mechanism, which is used to separate the packaging boxes in sequence.

[0011] Among them, a push-pull mechanism is provided at the second conveying path, and the push-pull mechanism is used to move the placement rack corresponding to the empty space in the U-shaped plate to the second conveying path.

[0012] The beneficial effects of the present invention are as follows: the placement rack has an ingenious structure, can accommodate a stack of packaging boxes, and can be conveniently transported by the first conveyor; through the structural coordination of the first conveyor, the turntable, and the placement rack, the placement rack can be automatically transported to the turntable by the first conveyor, and the turntable can also automatically rotate the placement rack to another workstation; at the box separation mechanism, a release mechanism can rotate the support plate outward, so that the packaging boxes in the placement rack fall into the box separation mechanism as a whole; at the second conveyor, an empty placement rack can be automatically separated from the turntable by a push-pull mechanism. The present invention realizes the automatic transportation of stacked packaging boxes and automatically transfers the stacked packaging boxes to the box separation mechanism without manual intervention, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The structure diagram of the lunch box separation and conveying device in the prior art is shown;

[0014] Figure 2 Shows the structure diagram of the automatic replenishment device;

[0015] Figure 3 Shows a top view of the automatic replenishment device;

[0016] Figure 4 for Figure 3 A partial enlarged view of the middle part;

[0017] Figure 5 for Figure 3 A partial enlarged view of point B in the middle;

[0018] Figure 6 Shown is a diagram of the placement rack structure;

[0019] Figure 7 A top view of the turntable is shown;

[0020] Figure 8 It shows a structural diagram of the first conveyor channel conveying the placement rack to the corresponding U-shaped plate;

[0021] Figure 9 for Figure 8 A partial enlarged view of point C in the middle;

[0022] Figure 10 A side view of the locking block, the adjusting block and the cross plate is shown;

[0023] Figure 11 Shows the push-pull mechanism structure diagram;

[0024] Figure 12 for Figure 11 A partial enlarged view of point D in the middle;

[0025] Figure 13 The structure diagram of the box separation mechanism, the supporting mechanism, the guide plate and the conveying platform at the release mechanism is shown;

[0026] Figure 14 A rear view of the box separation mechanism, the supporting mechanism, the guide plate and the conveying platform is shown;

[0027] Figure 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, support plate-23, unloading chute-211, arc surface-212, gear-24, first conveying path-3, release mechanism-6, second conveying path-4, first telescopic rod-61, rack-62, first support seat-63, push-pull mechanism-7, groove-15, second support seat-74, strip groove-741, second Telescopic rod 71, pull rod 72, pull block 73, vertical plate 711, first inclined surface 731, mounting slot 14, lock 5, lock block 51, adjustment block 52, horizontal plate 53, lock hole 213, second inclined surface 511, unlocking rod 75, third inclined surface 751, adjustment slot 521, annular plate 231, notch 232, supporting mechanism 8, lifting rod 81, circular tray 82, conveyor platform 10, guide plate 92, baffle 93, avoidance slot 94. DETAILED DESCRIPTION

[0028] like Figure 2 、 Figure 13 As shown, this embodiment provides an automatic replenishment device for food packaging boxes, including a box separation mechanism 9, a turntable 1, multiple placement racks 2, a first conveying channel 3, a release mechanism 6, a second conveying channel 4 and a push-pull mechanism 7.

[0029] Specifically, such as Figure 2 、 Figure 7As 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. There are four through-slots 12 in a circular array on the turntable 1. The size of the through-slots 12 is to allow the packaging box to pass through. A U-shaped plate 13 is provided around each through-slot 12. The opening of the U-shaped plate 13 faces the outside of the turntable 1. The three inner walls of the U-shaped plate 13 form steps with the through-slot 12. The function of the steps is to support the placement rack 2.

[0030] Specifically, such as Figure 4 、 Figure 6 As shown, the placement rack 2 includes a bottom frame 21, four columns 22 and a support plate 23. A material discharge trough 211 is provided at the center of the bottom frame 21. The material discharge trough 211 passes through the bottom frame 21 in the vertical direction. The two side surfaces of the bottom frame 21 are set to symmetrical arc surfaces 212. The radius of the arc surface 212 is consistent with 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 on 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 columns 22. The gear 24 rotatably cooperates with the column 22. A torsion spring is provided at the connection between the first end of the support plate 23 and the column 22. The function of the torsion spring is to keep the support plate 23 in the position as shown in FIG. Figure 6 In the state shown, the second end of the support plate 23 is located above the discharge chute 211. The support plate 23 is used to support the stacked packaging boxes. The four columns 22 serve to limit the packaging boxes. The size of the discharge chute 211 must allow the packaging boxes to pass through.

[0031] Specifically, such as Figure 2 、 Figure 7 As shown, the first conveying path 3 , the release mechanism 6 and the second conveying path 4 are all arranged on the outer periphery of the turntable 1 , and the positions of the three correspond to a U-shaped plate 13 respectively.

[0032] like Figure 2 、 Figure 4 、 Figure 6 、 Figure 7 As shown, the first conveyor path 3 is arranged on the top of the third support seat. The first conveyor path 3 adopts a roller conveying method. The inner walls on both sides are arrayed with rollers for conveying the placement racks 2 with stacked packaging boxes to the corresponding U-shaped plate 13 in sequence. One U-shaped plate 13 can accommodate one placement rack 2. After the placement rack 2 is conveyed to the U-shaped plate 13, the unloading chute 211 is opposite to the through groove 12. The 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 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: to Figure 4 For example, the bottom frame 21 in the U-shaped plate 13 can intercept the bottom frame 21 on the first conveying lane 3, isolating the placement rack 2 on the first conveying lane 3 outside the turntable 1, ensuring that the placement rack 2 on the first conveying lane 3 does not hinder the rotation of the turntable 1.

[0033] Specifically, such as Figure 6 、 Figure 7 、 Figure 13 As shown, 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 support plate 23 in the placement rack 2 to the outside of the placement rack 2, so that the packaging boxes stacked 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 technology, and is used to separate the packaging boxes in sequence. The box separation mechanism 9 belongs to the existing technology, and its structure and principle will not be elaborated in detail here.

[0034] Specifically, such as Figure 2 、 Figure 3 、 Figure 5 As 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 arranged on a 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 is extended, it is used to move the rack 62, prompting the gear 24 on the corresponding placement rack 2 to rotate, thereby causing the support plate 23 to rotate toward the outside of the placement rack 2.

[0035] Specifically, such as Figure 2 、 Figure 3 As shown, the second conveyor 4 is provided on top of the second support base 74. The second conveyor 4 adopts a roller-type conveying method, and rollers are arrayed on the inner walls of both sides. The second conveyor 4 is provided with a push-pull mechanism 7, which is used to move the placement rack 2 corresponding to the empty space in the U-shaped plate 13 onto the second conveyor 4. There are many ways to implement the push-pull mechanism 7, such as using a clamp to clamp the placement rack 2, and then using a pneumatic telescopic rod to translate the placement rack 2 onto the second conveyor 4.

[0036] How to use the above device:

[0037] Stack the packaging boxes in the multiple placement racks 2 in advance;

[0038] The first conveyor 3 sequentially conveys the stacking racks 2 with the packaging boxes to the corresponding U-shaped plate 13. Taking the first rack 2 as an example, after the first rack 2 is conveyed to the U-shaped plate 13, the turntable 1 rotates 90 degrees.

[0039] After a period of time, the turntable 1 rotates another 90 degrees. At this time, the first placement rack 2 is located at the release mechanism 6. The first telescopic rod 61 moves the rack 62 toward the first placement rack 2, causing the gear 24 on the first placement rack 2 to rotate, thereby causing the support plate 23 to rotate toward the outside of the placement rack 2. The packaging boxes stacked in the placement rack 2 fall into the box separation mechanism 9 as a whole.

[0040] The box separation mechanism 9 separates the stacked boxes into individual boxes in sequence;

[0041] After the packaging boxes are separated, the turntable 1 rotates another 90°. At this time, the first placement rack 2 is located at the second conveying path 4 , and the push-pull mechanism 7 moves the first placement rack 2 to the second conveying path 4 .

[0042] As a preferred solution, the push-pull mechanism 7 of this embodiment has the following specific structure:

[0043] First, the structure of the turntable 1 is improved, such as Figure 7 As shown, eight grooves 15 are provided on the top of the turntable 1 along the circumferential direction. Two adjacent grooves 15 form a group and are located at the opening of the corresponding U-shaped plate 13. The inner ends of the grooves 15 are connected to the corresponding through grooves 12, and the outer ends of the grooves 15 completely penetrate the side wall of the turntable 1.

[0044] like Figure 3 、 Figure 11 、 Figure 12 When the cam 73 is in the unlock position, the two ends of the cam 73 are locked and the two ends of the cam 73 are locked.

[0045] The method by which the push-pull mechanism 7 moves the placement rack 2 to the second conveyor path 4 is as follows: the second telescopic rod 71 is extended to allow the two rectangular blocks to pass through the corresponding grooves 15. During this process, the first inclined surface 731 of the pulling block 73 is squeezed by the bottom frame 21, prompting the pulling block 73 to retract into the rectangular groove; after the pulling block 73 passes through the groove 15, the pulling block 73 bounces up under the action of its own first spring, and at this time the pulling block 73 is located in the bottom frame 21; then the second telescopic rod 71 is shortened and reset, and the two pulling blocks 73 will pull the bottom frame 21 toward the second conveyor path 4. When the bottom frame 21 contacts the rollers of the second conveyor path 4, all rollers run synchronously, thereby completely separating the placement rack 2 from the turntable 1.

[0046] One point is explained here: when the two pulling blocks 73 pull the bottom frame 21 toward the second conveyor path 4, to be precise, the pulling blocks 73 act on the outer edge of the bottom frame 21. When all the rollers run synchronously and the placement rack 2 is separated from the turntable 1, the inner edge of the bottom frame 21 will gradually approach the two pulling blocks 73, and then squeeze the two pulling blocks 73, so that the pulling blocks 73 shrink into the rectangular groove, ensuring that the placement rack 2 can smoothly separate from the turntable 1.

[0047] 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:

[0048] like Figure 7-10 As shown, there are four mounting grooves 14 in a circular array on the turntable 1. The mounting grooves 14 completely pass through the turntable 1 from top to bottom. 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 provided at the bottom thereof. 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 a second spring. 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 a position corresponding to the bottom frame 21 and the mounting groove 14, and the side of the top of the locking block 51 facing the outside of the turntable 1 is set as a second inclined surface 511. 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 retract into the mounting groove 14. When the placement rack 2 is completely located in the U-shaped plate 13, the locking block 51 bounces into the locking hole 213 under the action of the second spring, thereby locking the placement rack 2.

[0049] One point to note here is that 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 face in the same direction.

[0050] The above solution adds a lock 5 for locking the placement rack 2, so an unlocking component needs to be set 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. The fourth inclined surface is aligned with the third inclined surface 751, and the second conveying path 4.

[0051] Unlocking method: When the second telescopic rod 71 is extended, the unlocking rod 75 can be inserted into the corresponding adjustment groove 521. 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.

[0052] The push-pull mechanism 7 provided in this embodiment has an ingenious structure, which can not only unlock the device but also pull the rack 2 onto the second conveyor path 4 to separate the rack 2 from the turntable 1. The specific method is as follows:

[0053] The second telescopic rod 71 is extended, and the unlocking rod 75 is first inserted into the adjusting groove 521, causing the locking block 51 to retract downward into the mounting groove 14 to achieve unlocking, and then the two rectangular blocks pass through the corresponding grooves 15; then the second telescopic rod 71 is shortened, and the two pulling blocks 73 pull the bottom frame 21 toward the second conveying path 4. When the bottom frame 21 contacts the rollers of the second conveying path 4, the second telescopic rod 71 stops briefly. At this time, the locking block 51 is still retracted into the mounting groove 14, and all 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.

[0054] As mentioned above, the first telescopic rod 61 moves the rack 62 toward the placement rack 2, causing the gear 24 on the placement rack 2 to rotate, thereby causing the support plate 23 to rotate outward from the placement rack 2, and the packaging boxes stacked in the placement rack 2 fall as a whole into the box separation mechanism 9. In order to improve the stability of the overall fall of the packaging boxes, this embodiment adopts the following measures:

[0055] like Figure 6 As shown, an annular plate 231 is provided at the second end of the support plate 23, a circular groove is provided at the center of the annular plate 231, and a notch 232 is provided at a specific position of the annular plate 231. The position and function of the notch 232 are described in detail in the next paragraph.

[0056] like Figure 3 、 Figure 6 、 Figure 13 As shown, the device also includes a supporting mechanism 8 provided at the box separation mechanism 9, and the supporting mechanism 8 includes a lifting rod 81 and a circular tray 82 provided on the top thereof. The movable end of the lifting rod 81 passes upward through the central channel of the box separation mechanism 9, and 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 upward, it is used to support the stacked packaging boxes; when the support plate 23 rotates toward the outside of the turntable 1, the gap 232 is used to avoid the circular tray 82.

[0057] Further, such as Figure 6 、 Figure 13 、 Figure 14As shown, the device also includes a conveyor table 10 and a guide plate 92 provided at the box separation mechanism 9. The first end of the guide plate 92 is located below the box separation mechanism 9, and the second end of the guide plate 92 extends obliquely downward to the table surface of the conveyor table 10, and is used to slide the packaging boxes separated by the box separation mechanism 9 down onto the conveyor table 10. Baffles 93 are provided on both sides of the guide plate 92, and the guide plate 92 is provided with an avoidance groove 94 running through it from top to bottom. When the circular tray 82 moves downward, the avoidance groove 94 is used to avoid the circular tray 82.

[0058] Instructions for use: the lifting rod 81 moves the circular tray 82 upward until the circular tray 82 contacts the packaging box; the first telescopic rod 61 moves the rack 62 toward the direction of the placement rack 2, prompting the gear 24 on the placement rack 2 to rotate, thereby causing the support plate 23 to rotate toward the outside of the placement rack 2 and maintain this state; the lifting rod 81 moves the circular tray 82 downward, and the stacked packaging boxes move downward as a whole with the circular tray 82 until the packaging boxes fall into the box separation mechanism 9; the lifting rod 81 continues to move the circular tray 82 downward, and the circular tray 82 stops moving after passing through the avoidance groove 94 downward; 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 conveyor platform 10; when a stack of packaging boxes is separated, the first telescopic rod 61 retracts the rack 62, and the support plate 23 moves back to the placement rack 2 under the action of the torsion spring.

[0059] The above embodiments are only used to illustrate the technical ideas and features of the present invention and are not intended to be exclusive or limit the present invention. It should be understood by those skilled in the art that various changes or equivalent substitutions made to the present invention without departing from the scope of the present invention are within the scope of protection of the present invention.

Claims

1. A food packaging box automatic replenishment device, comprising a box separation mechanism (9), characterized in that: Also includes: A turntable (1) has four through-grooves (12) arranged in a circumferential array on its upper surface, a U-shaped plate (13) is provided around the through-grooves (12), the opening of the U-shaped plate (13) faces outward from the turntable (1), and a box separation mechanism (9) is provided on a bracket (91) and is located below one of the through-grooves (12); A plurality of placement racks (2), the placement racks (2) comprising a bottom frame (21), four upright posts (22) and a support plate (23), a material discharge trough (211) being provided at the center of the bottom frame (21), two side surfaces of the bottom frame (21) being provided as symmetrical arc surfaces (212), the radius of the arc surface (212) being consistent with the radius of the turntable (1), the four upright posts (22) being arranged in a rectangular array on the top of the bottom frame (21), a gear (24) being provided at the top of the first end of the support plate (23), the first end of the support plate (23) being rotatably connected to one of the upright posts (22), and a torsion spring being provided at the connection between the two, the gear (24) being rotatably matched to the upright post (22), the second end of the support plate (23) being located above the material discharge trough (211) for supporting stacked packaging boxes; A first conveying path (3), a release mechanism (6), and a second conveying path (4) are provided on the outer periphery of the turntable (1), and the positions of the three correspond to a U-shaped plate (13) respectively; The first conveying path (3) is used to sequentially convey the placement racks (2) stacked with packaging boxes to the corresponding U-shaped plates (13), and the unloading trough (211) is directly opposite the through-trough (12), and the 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 the two end surfaces of the bottom frame (21) are respectively in close contact with the three inner walls of the U-shaped plate (13); The release mechanism (6) includes a first telescopic rod (61) and a rack (62) connected to the telescopic end thereof. The first telescopic rod (61) is provided on a first support seat (63). When the telescopic end thereof is extended, the rack (62) is moved to cause the gear (24) on the corresponding placement rack (2) to rotate, so that the support plate (23) rotates toward the outside of the turntable (1), and the stacked packaging boxes fall as a whole into the box separation mechanism (9). The box separation mechanism (9) is used to separate the packaging boxes in sequence. Wherein, a push-pull mechanism (7) is provided at the second conveying path (4), and the push-pull mechanism (7) is used to move the empty placement rack (2) in the corresponding U-shaped plate (13) to the second conveying path (4).

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

3. The automatic replenishment device for food packaging boxes according to claim 2, characterized in that: Eight grooves (15) are provided on the top of the turntable (1) along the circumferential direction. Two adjacent grooves (15) form a group and are located at the opening of the corresponding U-shaped plate (13). The inner ends of the grooves (15) are connected to the corresponding through grooves (12), and the outer ends completely penetrate the side wall of the turntable (1). The push-pull mechanism (7) is provided in the strip groove (741) on 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 vertical plate. (711) outside, two pull rods (72) are horizontally arranged on the inside of 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 provided in the rectangular groove, the top of the first spring is connected to the pull block (73), the top of the pull block (73) facing the turntable (1) is set as a first inclined surface (731), and when the second telescopic rod (71) is extended, it is used to make the rectangular block pass through the corresponding groove (15), and in 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: The turntable (1) has four mounting grooves (14) arranged in a circular array. 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. 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) provided at the bottom thereof. 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 connected to the turntable (1) through a second spring. 1), the top surface of the adjusting block (52) is in close contact with the bottom surface of the turntable (1), the locking block (51) is slidably arranged in the mounting groove (14), the bottom frame (21) is provided with a locking hole (213) at a position corresponding to the mounting groove (14), and the top of the locking block (51) is provided with a second inclined surface (511) facing the outside of the turntable (1), when the placement rack (2) is transported into the U-shaped plate (13), the second inclined surface (511) is located in the locking hole (213) for locking the placement rack (2).

5. The automatic replenishment device for food packaging boxes according to claim 4, characterized in that: The push-pull mechanism (7) further comprises 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 adjusting block (52) is provided with an adjusting groove (521), and the adjusting groove (521) passes through the adjusting block (52) in the direction along the radius of the turntable (1). The bottom surface of the adjusting groove (521) is set as a fourth inclined surface. At the second conveying path (4), when the telescopic end of the second telescopic rod (71) is extended, it is used to insert the unlocking rod (75) into the corresponding adjusting groove (521), and the squeezing action of the third inclined surface (751) on the fourth inclined surface causes the locking block (51) to retract downward into the mounting groove (14); when the push-pull mechanism (7) pulls the empty placement 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, characterized in that: The second end of the supporting plate (23) is provided with an annular plate (231), a circular groove is provided at the center of the annular plate (231), and a notch (232) is provided on the annular plate (231).

7. The automatic replenishment device for food packaging boxes according to claim 6, characterized in that: The invention also includes a supporting mechanism (8) provided at the box separation mechanism (9), the supporting mechanism (8) including a lifting rod (81) and a circular tray (82) provided on the top thereof, the movable end of the lifting rod (81) passing upward through the central channel of the box separation mechanism (9), 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 upward, it is used to support the stacked packaging boxes; when the supporting plate (23) rotates toward the outside of 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: The utility model further comprises a conveying platform (10) and a guide plate (92) provided at the box separation mechanism (9), wherein the first end of the guide plate (92) is located below the box separation mechanism (9), and the second end of the guide plate (92) extends obliquely downward to the table surface of the conveying platform (10), and is used for sliding the packaging box separated by the box separation mechanism (9) down onto the conveying platform (10), baffles (93) are provided on both sides of the guide plate (92), and the guide plate (92) is provided with an avoidance groove (94) running through it from top to bottom, and when the circular tray (82) moves downward, the avoidance groove (94) is used to avoid the circular tray (82).

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