An automatic edge-folding device for lunch boxes

Abstract

This utility model provides an automatic edge folding device for a lunchbox, including a mold base and an edge folding mechanism on the top of the mold base. A groove is formed on the top of the front end of the mold base. A first hydraulic rod drives a first pressure plate to descend, facilitating the compression of the cardboard at the box body position of the paper lunchbox, thus facilitating edge folding. By placing the lid of the paper lunchbox inside the groove, the first pressure plate presses down on the lid, causing the tongue edges on three sides of the lid to fold and remain vertical under the action of the groove. A horizontal hydraulic rod pushes a push plate to move inside a limiting groove, and the top of the push plate presses against the tongue edges of the lid, causing the tongue edges to fold further. The second hydraulic rod and the second pressure plate work together to press down on the tongue edges of the lid, facilitating thorough edge folding and improving the practicality of the edge folding device.

Description

Technical Field

[0001] This utility model relates to the field of paper lunch box processing technology, specifically to an automatic edge folding device for lunch boxes. Background Technology

[0002] Square paper lunch boxes are usually polyhedral structures formed by moving and folding multiple faces. The internal space of a square paper lunch box is used to hold food.

[0003] In the processing of square paper lunch boxes, cardboard needs to be cut to the corresponding size and shape according to the shape of the square paper lunch box. Then, the cut cardboard is placed in a folding device for gluing and folding to form a square paper lunch box. The square paper lunch box includes a box body and a box lid. The box lid and box body are an integral structure. In order to better protect the food in the square paper lunch box, the box lid is provided with tongue edges on three sides.

[0004] Chinese utility model patent CN220262164U discloses a paper box folding device, including a paper box folding platform. The top side of the folding platform has a folding placement groove, and the bottom inner wall of the folding placement groove has a bottom telescopic component. A bottom placement plate is installed on the bottom telescopic component and is located in the folding placement groove. Existing folding devices can only fold and assemble the box body and lid, but cannot fold the tongue of a square paper lunch box. Before using a square paper lunch box, the tongue needs to be folded by hand, which reduces the practicality of the folding device.

[0005] Therefore, this utility model provides an automatic edge folding device for lunch boxes. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an automatic edge folding device for a paper lunch box to solve the problems mentioned in the background art. This utility model uses a first pressure plate to squeeze the lid of the paper lunch box, and through the movement of the push plate and the downward pressure of the second pressure plate, it can fully squeeze the tongue edge, which facilitates the folding of the tongue edge of the paper lunch box, thereby improving the practicality of the folding device.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an automatic edge-folding device for a lunchbox, comprising a mold base and an edge-folding mechanism on the top of the mold base. A groove is formed at the top front end of the mold base. The edge-folding mechanism is positioned on three sides of the top of the groove. The edge-folding mechanism includes a limiting groove, a push plate, and a second pressure plate. The limiting groove is formed on three sides of the groove corresponding to the interior of the mold base. The push plate is L-shaped, and its bottom end is slidably mounted inside the limiting groove. The second pressure plate is pushed to the bottom of the top of the push plate via a second hydraulic rod. A top plate is movably mounted inside the groove via the limiting mechanism. A support plate is fixedly mounted on the front side of the top plate via a connecting rod. A paper lunchbox is placed on the top of the support plate.

[0008] Furthermore, a first pressure plate is movably mounted on the top of the mold base via vertical and horizontal rods. Limiting rods are fixedly mounted on both sides of the top of the first pressure plate. The vertical rods are symmetrically fixed at both ends of the top of the mold base, and the horizontal rods are horizontally fixedly mounted on the top of the two vertical rods.

[0009] Furthermore, a first hydraulic rod is fixedly installed at the middle position of the top of the crossbar, and a first pressure plate is fixedly installed at the bottom of the output rod of the first hydraulic rod corresponding to the bottom of the crossbar. The first pressure plate is located directly above the groove, and the limiting rod is slidably installed inside both ends of the crossbar.

[0010] Furthermore, a transverse hydraulic rod is fixedly installed on one side of the limiting slide corresponding to the inside of the mold base, and one end of the output rod of the transverse hydraulic rod is fixedly connected to the bottom outer wall of the push plate.

[0011] Furthermore, the top end of the push plate is slidably disposed on the top of the mold base and in close contact with it, the second hydraulic rod is fixedly disposed on the top of the push plate, and the second pressure plate is fixedly disposed on the bottom end of the output rod of the second hydraulic rod.

[0012] Furthermore, the limiting mechanism includes limiting blocks, which are symmetrically fixed on both sides of the bottom of the top plate, and the limiting blocks are in the shape of a "T".

[0013] Furthermore, the limiting block is slidably installed at the bottom of the groove corresponding to the inside of the mold base, and a lifting hydraulic rod is fixedly installed between the two limiting blocks corresponding to the inside of the mold base. The output rod of the lifting hydraulic rod is fixedly connected to the bottom of the top plate.

[0014] Furthermore, the connecting rods are symmetrically fixedly installed on the bottom two sides of the front end of the top plate and on the rear two sides of the support plate. The connecting rods are limited and slidably installed inside the front end of the mold base. A lid is fixedly connected to the top rear side of the paper lunch box, and tongue edges are fixedly provided on three sides of the lid.

[0015] The beneficial effects of this utility model are as follows: The automatic edge folding device for a paper lunchbox uses a first hydraulic rod to lower a first pressure plate, facilitating the compression of the cardboard at the box body position and thus enabling edge folding. By placing the lid of the paper lunchbox inside the groove, the first pressure plate presses down on the lid, causing the tongue edges on three sides of the lid to fold and remain vertical under the action of the groove. A horizontal hydraulic rod pushes a push plate to move within a limiting groove, with the top of the push plate pressing against the tongue edges of the lid, further folding them. The second hydraulic rod and the second pressure plate work together to press down on the tongue edges, ensuring thorough folding and improving the practicality of the folding device. The support plate and top plate allow for simultaneous lifting and lowering of the box body and lid, facilitating the unloading of the paper lunchbox lid from the top of the groove. Attached Figure Description

[0016] Figure 1 This is a structural diagram of an automatic edge-folding device for a lunchbox according to the present invention;

[0017] Figure 2 This is a front cross-sectional view of an automatic edge-folding device for a lunchbox according to the present invention;

[0018] Figure 3 This utility model relates to an automatic edge-folding device for lunch boxes. Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 This is a structural diagram of the mold base for an automatic edge-folding device for lunch boxes according to this utility model;

[0020] Figure 5 This is a cross-sectional view of the mold base of an automatic edge-folding device for a lunchbox according to this utility model;

[0021] Figure 6 This is a structural diagram of the support plate and top plate of an automatic edge-folding device for a lunchbox according to the present invention;

[0022] In the diagram: 1. Mold base; 2. Folding mechanism; 3. Groove; 4. Support plate; 5. Paper lunch box; 6. Vertical rod; 7. Horizontal rod; 8. First hydraulic rod; 9. Limiting rod; 10. First pressure plate; 11. Lateral hydraulic rod; 12. Top plate; 13. Limiting block; 14. Lifting hydraulic rod; 15. Limiting slide; 16. Push plate; 17. Second pressure plate; 18. Second hydraulic rod. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Please see Figures 1 to 6 This utility model provides a technical solution: an automatic edge-folding device for a lunchbox, including a mold base 1 and an edge-folding mechanism 2 disposed on the top of the mold base 1. A groove 3 is formed on the top of the front end of the mold base 1. The edge-folding mechanism 2 is disposed on three sides of the top of the groove 3. The edge-folding mechanism 2 includes a limiting slide groove 15, a push plate 16, and a second pressure plate 17. The limiting slide groove 15 is formed on three sides of the groove 3 corresponding to the interior of the mold base 1. The push plate 16 is L-shaped, and its bottom end is slidably mounted inside the limiting slide groove 15. The second pressure plate 17 is connected by a second hydraulic rod 1. At the bottom of the top of the push plate 16, a top plate 12 is movably provided inside the groove 3 through a limiting mechanism. A support plate 4 is fixedly installed on the front side of the top plate 12 through a connecting rod. A paper lunch box 5 is placed on the top of the support plate 4. By adjusting the movement of the push plate 16, the top of the push plate 16 can continue to squeeze and fold the lid flap of the paper lunch box 5. At the same time, the second hydraulic rod 18 drives the second pressure plate 17 to descend, which facilitates pressing down on the lid flap of the paper lunch box 5. This makes it convenient to fully fold the lid flap of the paper lunch box 5, making it more practical and improving the usability of the folding device.

[0025] In this embodiment, a first pressure plate 10 is movably mounted on the top of the mold base 1 via vertical rods 6 and horizontal rods 7. Limiting rods 9 are fixedly mounted on both sides of the top of the first pressure plate 10. The vertical rods 6 are symmetrically fixed at both ends of the top of the mold base 1. The horizontal rods 7 are horizontally fixedly mounted on the top ends of the two vertical rods 6. A first hydraulic rod 8 is fixedly mounted at the middle position of the top end of the horizontal rod 7. The first pressure plate 10 is fixedly mounted below the bottom end of the output rod of the first hydraulic rod 8, corresponding to the horizontal rod 7. The first pressure plate 10 is positioned directly above the groove 3. The limiting rod 9 is slidably installed inside both ends of the horizontal rod 7. The vertical rod 6 can support the horizontal rod 7, the first hydraulic rod 8 and the first pressure plate 10. The first hydraulic rod 8 can drive the first pressure plate 10 to descend and squeeze the lid of the paper lunch box 5, so that the tongue edge of the lid of the paper lunch box 5 can be folded, which facilitates the subsequent squeezing of the tongue edge of the lid of the paper lunch box 5. The limiting rod 9 can move up and down with the first pressure plate 10, which can facilitate the limiting of the first pressure plate 10 and improve the stability of the first pressure plate 10.

[0026] In this embodiment, a transverse hydraulic rod 11 is fixedly installed on one side of the limiting slide groove 15 corresponding to the interior of the mold base 1. One end of the output rod of the transverse hydraulic rod 11 is fixedly connected to the bottom outer wall of the push plate 16. The top end of the push plate 16 is slidably disposed on the top of the mold base 1 and in close contact. The second hydraulic rod 18 is fixedly disposed on the top of the push plate 16, and the second pressure plate 17 is fixedly disposed on the bottom end of the output rod of the second hydraulic rod 18. The limiting slide groove 15 can limit the push plate 16, thereby improving the stability of the push plate 16 and the second pressure plate 17. The transverse hydraulic rod 11 facilitates the movement and adjustment of the push plate 16, making it convenient to fold the edge of the lid of the paper lunch box 5 through the push plate 16.

[0027] In this embodiment, the limiting mechanism includes limiting blocks 13, which are symmetrically fixed on both sides of the bottom of the top plate 12. The limiting blocks 13 are T-shaped and are slidably installed in the bottom of the groove 3 corresponding to the mold base 1. A lifting hydraulic rod 14 is fixedly installed between the two limiting blocks 13 corresponding to the inside of the mold base 1. The output rod of the lifting hydraulic rod 14 is fixedly connected to the bottom of the top plate 12. The top plate 12 can be limited by the cooperation of the limiting blocks 13 and the groove 3. The top plate 12 can be raised and lowered by the lifting hydraulic rod 14, so that the lid of the paper lunch box 5 can be pushed out from the inside of the groove 3 through the top plate 12 and the lid of the paper lunch box 5 can be stuck in the inside of the groove 3, which facilitates the unloading of the paper lunch box 5.

[0028] In this embodiment, the connecting rods are symmetrically fixed on the bottom two sides of the front end of the top plate 12 and the rear two sides of the support plate 4. The connecting rods are slidably installed inside the front end of the mold base 1. A lid is fixedly connected to the top rear side of the paper lunch box 5. Tongue edges are fixedly provided on three sides of the lid. The connecting rods can also limit the top plate 12 and the support plate 4, and make the support plate 4 and the top plate 12 rise and fall synchronously to prevent the paper lunch box 5 from tearing between the box body and the lid, thus ensuring the integrity of the paper lunch box 5.

[0029] When using the automatic edge folding device for this lunchbox, a baffle is fixedly installed at the front end of the groove 3 corresponding to the top of the support plate 4 using screws or similar means. The cut cardboard is placed on top of the groove 3 relative to the body of the paper lunchbox 5. The first hydraulic rod 8 and its matching hydraulic circuit drive the first pressure plate 10 to descend. The first pressure plate 10 drives the limiting rod 9 to slide inside the crossbar 7, which facilitates the improvement of the stability of the first pressure plate 10. As the first pressure plate 10 presses down on the cardboard, the three sides of the groove 3 and the baffle can squeeze and fold the four sides of the cardboard, splicing them together to form the body of the paper lunchbox 5. After all the box body processing is completed, the lid tongue edge of the paper lunch box 5 is processed; the baffle on the front side of the groove 3 is removed, the lid of the paper lunch box 5 is placed inside the groove 3, and the box body of the paper lunch box 5 is placed on top of the support plate 4. The first hydraulic rod 8 and its matching hydraulic circuit control and drive the first pressure plate 10 to descend, so that the lid of the paper lunch box 5 can be pressed down by the first pressure plate 10, so that the tongue edges on three sides of the lid of the paper lunch box 5 are folded under the action of the groove 3 and kept in a vertical state. The first pressure plate 10 is raised, adjusted and reset, and driven by the horizontal hydraulic rod 11 and its matching hydraulic circuit. The push plate 16 moves inside the limiting slide groove 15. The top of the push plate 16 presses against the tongue edge of the paper lunch box 5 lid, causing the tongue edge of the paper lunch box 5 lid to continue folding. After the push plate 16 can no longer move, the second hydraulic rod 18 and its matching hydraulic circuit drive the second pressure plate 17 to descend, and the second pressure plate 17 presses the folded tongue edge of the paper lunch box 5 lid downward, which facilitates the full folding of the tongue edge of the paper lunch box 5 lid, thereby improving the practicality of the folding device. After pressing, the second hydraulic rod 18 and its matching hydraulic circuit drive the second pressure plate 17 to reset, and the horizontal hydraulic rod 11 and its matching hydraulic circuit drive the second pressure plate 17 to reset. Its matching hydraulic circuit resets the push plate 16; the lifting hydraulic rod 14 and its matching hydraulic circuit lift the top plate 12, and the top plate 12 drives the support plate 4 to move upward synchronously through the connecting rod, which can simultaneously lift the body and lid of the paper lunch box 5, making it convenient to lift the lid of the paper lunch box 5 from the top inside the groove 3, preventing tearing between the body and lid of the paper lunch box 5, and facilitating the unloading of the paper lunch box 5; however, flow distributors are installed between the three transverse hydraulic rods 11 and between the three second hydraulic rods 18, which can control the three transverse hydraulic rods 11 and the three second hydraulic rods 18 to operate synchronously.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic edge-folding device for a lunchbox, comprising a mold base (1) and an edge-folding mechanism (2) disposed on the top of the mold base (1), characterized in that, The mold base (1) has a groove (3) at the top of its front end. The folding mechanism (2) is located on the top three sides of the groove (3). The folding mechanism (2) includes a limiting slide (15), a push plate (16), and a second pressure plate (17). The limiting slide (15) is located on the three sides of the groove (3) corresponding to the interior of the mold base (1). The push plate (16) is L-shaped. The bottom end of the push plate (16) is slidably installed inside the limiting slide (15). The second pressure plate (17) pushes the bottom of the top of the push plate (16) through the second hydraulic rod (18). The top plate (12) is movably installed inside the groove (3) through the limiting mechanism. The front side of the top plate (12) is fixedly installed with a support plate (4) through a connecting rod. A paper lunch box (5) is placed on the top of the support plate (4).

2. The automatic edge-folding device for a lunchbox according to claim 1, characterized in that: The top of the mold base (1) is movably provided with a first pressure plate (10) via a vertical rod (6) and a horizontal rod (7). Limiting rods (9) are fixedly provided on both sides of the top of the first pressure plate (10). The vertical rods (6) are symmetrically fixed at both ends of the top of the mold base (1), and the horizontal rods (7) are horizontally fixedly installed at the top of the two vertical rods (6).

3. The automatic edge-folding device for a lunchbox according to claim 2, characterized in that: A first hydraulic rod (8) is fixedly installed at the middle position of the top of the crossbar (7). The first pressure plate (10) is fixedly installed at the bottom of the output rod of the first hydraulic rod (8) corresponding to the bottom of the crossbar (7). The first pressure plate (10) is set directly above the groove (3). The limiting rod (9) is slidably installed inside both ends of the crossbar (7).

4. The automatic edge-folding device for a lunchbox according to claim 1, characterized in that: A transverse hydraulic rod (11) is fixedly installed on one side of the limiting slide groove (15) corresponding to the inside of the mold base (1). One end of the output rod of the transverse hydraulic rod (11) is fixedly connected to the bottom outer wall of the push plate (16).

5. The automatic edge-folding device for a lunchbox according to claim 4, characterized in that: The top end of the push plate (16) is slidably disposed on the top of the mold base (1) and in close contact with it. The second hydraulic rod (18) is fixedly disposed on the top of the push plate (16), and the second pressure plate (17) is fixedly disposed at the bottom end of the output rod of the second hydraulic rod (18).

6. The automatic edge-folding device for a lunchbox according to claim 1, characterized in that: The limiting mechanism includes a limiting block (13), which is symmetrically fixed on both sides of the bottom of the top plate (12). The limiting block (13) is in the shape of a "T".

7. The automatic edge-folding device for a lunchbox according to claim 6, characterized in that: The limiting block (13) is slidably installed at the bottom of the groove (3) corresponding to the mold base (1) inside. A lifting hydraulic rod (14) is fixedly installed between the two limiting blocks (13) corresponding to the mold base (1) inside. The output rod of the lifting hydraulic rod (14) is fixedly connected to the bottom of the top plate (12).

8. The automatic edge-folding device for a lunchbox according to claim 1, characterized in that: The connecting rods are symmetrically fixed on the bottom two sides of the front end of the top plate (12) and the rear two sides of the support plate (4). The connecting rods are limited and slidably installed inside the front end of the mold base (1). The top rear side of the paper lunch box (5) is fixedly connected to the lid, and the lid is fixedly provided with tongue edges on three sides.

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