Delivery device and delivery method for fresh cold chain delivery

Abstract

The invention discloses a delivery device and a delivery method for fresh food cold chain delivery. The delivery device comprises a bottom plate; the placing frame is arranged on the upper end surface of the bottom plate; the distribution box is arranged in the placing frame, and the lower end face of the distribution box is arranged on the upper end face of the bottom plate; the fixing assembly is used for fixedly installing the distribution box in the containing frame, the fixing assembly comprises a clamping mechanism, a connecting mechanism and a pressing mechanism, the clamping mechanism is of an inserting fixing structure, the connecting mechanism is of a hinged driving structure, and the pressing mechanism is of an up-down sliding structure; by arranging a fixing assembly composed of a clamping mechanism, a connecting mechanism and a pressing mechanism, the distribution box can be mounted and dismounted by pressing a handle, the distribution box can be quickly mounted and dismounted, the distribution box can be conveniently dismounted after being used for a long time, the distribution box can be conveniently cleaned, and the service life of the distribution box is prolonged. Therefore, the fresh-keeping property of the fresh products in cold chain distribution can be improved, and the fresh-keeping property of the fresh products is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of fresh produce cold chain distribution, and in particular to a distribution device and a distribution method for fresh produce cold chain distribution. Background Art

[0002] With the continuous growth of market demand for fresh agricultural products, cold chain distribution has become an important means to ensure the quality and safety of agricultural products. In the process of cold chain distribution of fresh products, cold chain distribution packaging boxes are needed. Cold chain distribution packaging boxes refer to boxes for storing refrigerated foods in cold chain transportation. They have certain preservation functions and play a role in protecting the internal food during transportation.

[0003] However, the existing fresh food cold chain distribution devices are not convenient for disassembling and installing the distribution boxes, which makes it difficult to clean the inside of the distribution boxes after long-term use, thereby affecting the freshness of the fresh products subsequently distributed. Therefore, we propose a distribution device and distribution method for fresh food cold chain distribution to solve the above-mentioned problems. Summary of the invention

[0004] The object of the present invention is to provide a distribution device and a distribution method for fresh cold chain distribution, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A distribution device for fresh cold chain distribution, comprising:

[0007] Base plate;

[0008] A placing frame, which is arranged on the upper end surface of the bottom plate;

[0009] A delivery box is arranged inside the placement frame, and the lower end surface is arranged on the upper end surface of the bottom plate;

[0010] The fixing assembly is used to fix the delivery box inside the placement frame. The fixing assembly includes a snap-on mechanism, a connecting mechanism, and a pressing mechanism. The snap-on mechanism is a plug-in fixing structure, the connecting mechanism is a hinged driving structure, and the pressing mechanism is an up and down sliding structure.

[0011] As a further solution of the present invention: the clamping mechanism includes two groups of clamping slots, the two groups of clamping slots are respectively arranged on the outer walls on both sides of the delivery box, a group of clamping plates are clamped inside the two groups of clamping slots, two groups of push rods are arranged on the side walls of the two groups of clamping plates, the other ends of the multiple groups of push rods are provided with two groups of push plates, the other side walls of the two groups of push plates are provided with a group of support plates, the lower end surfaces of the two groups of support plates are provided with a group of driving plates, two groups of fixing rods are slidably penetrated on the two groups of driving plates, one side walls of the multiple groups of fixing rods are respectively connected to the outer walls on both sides of the placement frame, a group of springs are sleeved on the outer sides of the multiple groups of fixing rods, one end of the multiple groups of springs are respectively connected to the outer walls on both sides of the placement frame, and the other ends of the multiple groups of springs are respectively connected to the side walls of the two groups of driving plates.

[0012] As a further solution of the present invention: the connecting mechanism includes two groups of connecting rods, the two groups of connecting rods are respectively arranged on the side walls of the two groups of driving plates, the other ends of the two groups of connecting rods are provided with a group of connecting rings, the inner walls of the two groups of connecting rings are slidably provided with cross bars, both ends of the cross bars are provided with a group of fixing blocks, the lower end surfaces of the two groups of fixing blocks are arranged on the upper end surface of the bottom plate, the outer walls of the two groups of connecting rings are provided with a group of first hinges, the two groups of the first hinges are hinged with a group of connecting rods, and the other ends of the two groups of connecting rods are hinged with second hinges.

[0013] As a further solution of the present invention: the pressing mechanism includes a connecting block, which is connected to the side wall of the second hinge, and a lifting rod is arranged on the other side wall of the connecting block, and a group of lifting rings are arranged at both ends of the lifting rod, and a group of limiting rods are slidably arranged on the inner walls of the two groups of lifting rings, the lower end surfaces of the two groups of limiting rods are arranged on the upper end surface of the bottom plate, the upper end surfaces of the two groups of limiting rods are arranged with a group of first limiting blocks, and the upper end surface of the lifting rod is provided with a handle.

[0014] As a further solution of the present invention: a group of second limiting blocks are arranged on the other end walls of the plurality of groups of fixing rods.

[0015] As a further solution of the present invention: the outer sliding sleeves of the multiple groups of push rods are provided with two groups of auxiliary support plates, and two groups of auxiliary rods are provided on the lower end surfaces of the two groups of auxiliary support plates, and the lower end surfaces of the multiple groups of auxiliary rods are respectively arranged on the upper end surfaces on both sides of the placement frame.

[0016] As a further solution of the present invention: two groups of locks are arranged on the front wall of the delivery box, a box cover is rotatably arranged on the upper end of the delivery box, two groups of clamps are arranged on the front wall of the box cover, and the locks are used in conjunction with the clamps.

[0017] As a further solution of the present invention: a mounting plate is connected to one side wall of the bottom plate, a pushing member is arranged on the upper end surface of the mounting plate, and a rubber sleeve rod is sleeved on the outer wall of the pushing member.

[0018] As a further solution of the present invention: a group of automatic brake wheels are arranged at the four corners of the lower end surface of the base plate.

[0019] A distribution method for fresh cold chain distribution, comprising the following steps:

[0020] Step 1: Open the box cover by two sets of locks and card members, place the fresh products to be delivered inside the delivery box, and then fix the box cover on the delivery box by the locks and card members to seal and preserve the fresh products;

[0021] Step 2: Then, by pushing the rubber sleeve rod, the bottom plate is pushed in cooperation with the pusher and multiple sets of automatic brake wheels, so that the delivery box can be moved to complete the delivery of fresh products;

[0022] Step 3: When the delivery box needs to be cleaned after being used for a long time, the lifting rod can be pressed downward by the handle, and the lifting rod moves downward under the cooperation of the lifting ring and the limit rod, and the lifting rod drives the second hinge to move downward through the connecting block, and the second hinge drives the two groups of first hinges to move through the connecting rod, and the two groups of first hinges drive the two groups of connecting rings to slide on the outer wall of the cross bar, so that the two groups of connecting rings slide to both sides, thereby driving the two groups of driving plates to move through the two groups of connecting rods;

[0023] Step 4: The two sets of driving plates drive the two sets of pushing plates to move through the supporting plates, and the pushing plates drive the two sets of card plates to move through the multiple sets of pushing rods, so that the two sets of card plates are separated from the inside of the two sets of card slots, thereby releasing the fixation of the delivery box, facilitating the disassembly of the delivery box, and facilitating the cleaning of the inside of the delivery box;

[0024] Step 5. When installing the cleaned delivery box, repeat the above steps, press the lifting rod through the handle to move the two sets of card plates, and then release the handle to allow the two sets of drive plates to reset under the elastic action of multiple sets of springs, thereby driving the two sets of card plates to be connected to the inner walls of the two sets of card slots, and the delivery box can be pressed and fixed, which is relatively convenient.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The delivery device and delivery method for cold chain delivery of fresh products, by providing a fixed assembly consisting of a snap-on mechanism, a connecting mechanism, and a pressing mechanism, can install and disassemble the delivery box by pressing a handle, can quickly install and disassemble the delivery box, and can conveniently disassemble and clean the delivery box after long-term use, thereby improving the freshness of cold chain delivery of fresh products and strengthening the preservation of fresh products. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention.

[0028] Figure 2 It is a structural schematic diagram of the back side of the present invention.

[0029] Figure 3 for Figure 2 A is a schematic diagram of the enlarged structure.

[0030] Figure 4 It is a schematic diagram of the structure of the present invention from a top view.

[0031] Figure 5 for Figure 4 B is a schematic diagram of the enlarged structure.

[0032] Figure 6 It is a schematic diagram of the structure of the delivery box in the present invention.

[0033] Among them: 1. bottom plate; 2. placement frame; 3. delivery box; 4. card slot; 5. card plate; 6. push rod; 7. push plate; 8. support plate; 9. drive plate; 10. fixed rod; 11. spring; 12. connecting rod; 13. connecting ring; 14. cross bar; 15. fixed block; 16. first hinge; 17. connecting rod; 18. second hinge; 19. connecting block; 20. lifting rod; 21. lifting ring; 22. limit rod; 23. first limit block; 24. handle; 25. second limit block; 26. auxiliary support plate; 27. auxiliary rod; 28. lock; 29. ​​box cover; 30. card; 31. mounting plate; 32. push member; 33. rubber sleeve rod; 34. automatic brake wheel. DETAILED DESCRIPTION

[0034] In one embodiment, Figure 1-Figure 6 As shown, a distribution device for fresh cold chain distribution includes:

[0035] Bottom plate 1;

[0036] A placing frame 2, which is arranged on the upper end surface of the base plate 1;

[0037] A delivery box 3 is arranged inside the placement frame 2, and a lower end surface is arranged on an upper end surface of the bottom plate 1;

[0038] A fixing assembly, which is used to fix the delivery box 3 inside the placement frame 2, and the fixing assembly includes a clamping mechanism, a connecting mechanism, and a pressing mechanism. The clamping mechanism is a plug-in fixing structure, the connecting mechanism is a hinged driving structure, and the pressing mechanism is an up-and-down sliding structure;

[0039] The clamping mechanism comprises two groups of clamping slots 4, which are respectively arranged on the outer walls of both sides of the delivery box 3, and a group of clamping plates 5 are clamped inside the two groups of clamping slots 4, and two groups of pushing rods 6 are arranged on the side walls of the two groups of clamping plates 5, and the other ends of the multiple groups of pushing rods 6 are provided with two groups of pushing plates 7, and the other side walls of the two groups of pushing plates 7 are provided with a group of supporting plates 8, and the lower end surfaces of the two groups of supporting plates 8 are provided with a group of driving plates 9, and two groups of fixing rods 10 are slidably penetrated on the two groups of driving plates 9, and one side wall of the multiple groups of fixing rods 10 is respectively connected to the outer walls of both sides of the placement frame 2, and the outer sides of the multiple groups of fixing rods 10 are sleeved with a group of springs 11, one end of the multiple groups of springs 11 is respectively connected to the outer walls of both sides of the placement frame 2, and the other ends of the multiple groups of springs 11 are respectively connected to the side walls of the two groups of driving plates 9; the connecting mechanism comprises two groups of connecting rods 12, which are respectively arranged on the side walls of the two groups of driving plates 9, and the other ends of the two groups of connecting rods 12 are respectively provided with A set of connecting rings 13 is provided, and a cross bar 14 is slidably provided on the inner wall of the two sets of connecting rings 13. A set of fixing blocks 15 are provided at both ends of the cross bar 14. The lower end faces of the two sets of fixing blocks 15 are provided on the upper end face of the bottom plate 1. A set of first hinges 16 are provided on the outer wall of the two sets of connecting rings 13. A set of connecting rods 17 are hinged on the two sets of first hinges 16. The other ends of the two sets of connecting rods 17 are hinged with second hinges 18. The pressing mechanism includes a connecting block 19. The connecting block 19 is connected to the side wall of the second hinge 18, and a lifting rod 20 is arranged on the other side wall of the connecting block 19. A group of lifting rings 21 are arranged at both ends of the lifting rod 20. A group of limiting rods 22 are slidably arranged on the inner walls of the two groups of lifting rings 21. The lower end surfaces of the two groups of limiting rods 22 are arranged on the upper end surface of the bottom plate 1. A group of first limiting blocks 23 are arranged on the upper end surfaces of the two groups of limiting rods 22. A handle 24 is arranged on the upper end surface of the lifting rod 20;

[0040] Specifically, when the delivery box 3 needs to be cleaned after being used for a long time, the lifting rod 20 can be pressed downward by the handle 24. The lifting rod 20 moves downward under the cooperation of the lifting ring 21 and the limit rod 22. The lifting rod 20 drives the second hinge 18 to move downward through the connecting block 19. The second hinge 18 drives the two groups of first hinges 16 to move through the connecting rod 17. The two groups of first hinges 16 drive the two groups of connecting rings 13 to slide on the outer wall of the cross bar 14, so that the two groups of connecting rings 13 slide to both sides, thereby driving the two groups of driving plates 9 to move through the two groups of connecting rods 12; the two groups of driving plates 9 drive the two groups of pushing plates 7 to move through the supporting plates 8, and the pushing plates 7 drive the two groups of card plates 5 to move through the multiple groups of pushing rods 6, so that the two groups of card plates 5 are separated from the inside of the two groups of card slots 4, thereby releasing the fixation of the delivery box 3, which is convenient for the delivery box 3. The two sets of card plates 5 are moved, and then the handle 24 is released, so that the two sets of driving plates 9 are reset under the elastic action of the multiple sets of springs 11, thereby driving the two sets of card plates 5 to be clamped on the inner walls of the two sets of card slots 4, and the delivery box 3 can be pressed and fixed, which is relatively convenient; by setting a fixing assembly composed of a clamping mechanism, a connecting mechanism, and a pressing mechanism, the delivery box 3 can be installed and disassembled by pressing the handle 24, and the delivery box 3 can be installed and disassembled quickly, which is convenient for the delivery box 3 to be disassembled after a long period of use, and the delivery box 3 can be cleaned, thereby improving the freshness of the cold chain delivery of fresh products and strengthening the freshness of fresh products.

[0041] like Figure 1-Figure 6As shown, a set of second limit blocks 25 are provided on the other end wall of the multiple sets of fixed rods 10; the second limit blocks 25 can limit one end face of the fixed rod 10. Two sets of auxiliary support plates 26 are provided on the outer sliding sleeves of the multiple sets of push rods 6, and two sets of auxiliary rods 27 are provided on the lower end faces of the two sets of auxiliary support plates 26. The lower end faces of the multiple sets of auxiliary rods 27 are respectively provided on the upper end faces of both sides of the placement frame 2; the auxiliary support plates 26 and the auxiliary rods 27 can support the push rods 6. Two sets of locks 28 are arranged on the front wall of the delivery box 3, and a box cover 29 is rotatably arranged on the upper end of the delivery box 3. Two sets of clamps 30 are arranged on the front wall of the box cover 29, and the locks 28 and the clamps 30 are used in coordination; the box cover 29 can be opened by the two sets of locks 28 and the clamps 30, and the fresh products to be delivered can be placed inside the delivery box 3, and then the box cover 29 can be fixed on the delivery box 3 by the locks 28 and the clamps 30, so as to seal and preserve the fresh products. A mounting plate 31 is connected to one side wall of the bottom plate 1, and a pusher 32 is arranged on the upper end surface of the mounting plate 31, and a rubber sleeve rod 33 is sleeved on the outer wall of the pusher 32; a set of automatic brake wheels 34 are arranged at the four corners of the lower end surface of the bottom plate 1; the rubber sleeve rod 33 can be pushed, and the bottom plate 1 can be pushed in coordination with the pusher 32 and the multiple sets of automatic brake wheels 34, so that the delivery box 3 can be moved and the fresh products can be delivered.

[0042] A distribution method for fresh cold chain distribution, comprising the following steps:

[0043] Step 1: Open the box cover 29 through the two sets of locks 28 and the clamps 30, place the fresh products to be delivered inside the delivery box 3, and then fix the box cover 29 on the delivery box 3 through the locks 28 and the clamps 30 to seal and preserve the fresh products;

[0044] Step 2: Then, by pushing the rubber sleeve rod 33, the bottom plate 1 is pushed in cooperation with the pusher 32 and the multiple sets of automatic brake wheels 34, so that the delivery box 3 can be moved to complete the delivery of fresh products;

[0045] Step 3: When the delivery box 3 needs to be cleaned after being used for a long time, the lifting rod 20 can be pressed downward by the handle 24. The lifting rod 20 moves downward under the cooperation of the lifting ring 21 and the limit rod 22. The lifting rod 20 drives the second hinge 18 to move downward through the connecting block 19. The second hinge 18 drives the two groups of first hinges 16 to move through the connecting rod 17. The two groups of first hinges 16 drive the two groups of connecting rings 13 to slide on the outer wall of the cross bar 14, so that the two groups of connecting rings 13 slide to both sides, thereby driving the two groups of driving plates 9 to move through the two groups of connecting rods 12;

[0046] Step 4: The two groups of driving plates 9 drive the two groups of pushing plates 7 to move through the supporting plates 8, and the pushing plates 7 drive the two groups of card plates 5 to move through the multiple groups of pushing rods 6, so that the two groups of card plates 5 are separated from the inside of the two groups of card slots 4, thereby releasing the fixation of the delivery box 3, facilitating the disassembly of the delivery box 3, and facilitating the cleaning of the inside of the delivery box 3;

[0047] Step 5. When installing the cleaned delivery box 3, repeat the above steps, press the lifting rod 20 through the handle 24 to move the two groups of card plates 5, and then release the handle 24 to allow the two groups of drive plates 9 to reset under the elastic action of the multiple groups of springs 11, thereby driving the two groups of card plates 5 to be clamped on the inner walls of the two groups of card slots 4, and the delivery box 3 can be pressed and fixed, which is relatively convenient.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A distribution device for fresh cold chain distribution, characterized in that: include: Bottom plate (1); A placement frame (2) arranged on the upper end surface of the bottom plate (1); A delivery box (3) is arranged inside the placement frame (2), and the lower end surface is arranged on the upper end surface of the bottom plate (1); A fixing assembly is used to fix the delivery box (3) inside the placement frame (2), and the fixing assembly comprises a snap-fit ​​mechanism, a connecting mechanism, and a pressing mechanism. The snap-fit ​​mechanism is a plug-in fixing structure, the connecting mechanism is a hinged driving structure, and the pressing mechanism is an up-and-down sliding structure.

2. A distribution device for fresh cold chain distribution according to claim 1, characterized in that: The clamping mechanism comprises two groups of clamping slots (4), the two groups of clamping slots (4) are respectively arranged on the outer walls of both sides of the delivery box (3), a group of clamping plates (5) are clamped inside the two groups of clamping slots (4), two groups of push rods (6) are arranged on the side walls of the two groups of clamping plates (5), two groups of push plates (7) are arranged at the other ends of the multiple groups of push rods (6), a group of support plates (8) are arranged on the other side walls of the two groups of push plates (7), and the lower end surfaces of the two groups of support plates (8) are A group of driving plates (9) is provided, and two groups of fixing rods (10) are slidably penetrated on the two groups of driving plates (9), and one side wall of the multiple groups of fixing rods (10) is respectively connected to the two side outer walls of the placement frame (2), and a group of springs (11) is sleeved on the outer sides of the multiple groups of fixing rods (10), and one end of the multiple groups of springs (11) is respectively connected to the two side outer walls of the placement frame (2), and the other end of the multiple groups of springs (11) is respectively connected to the side walls of the two groups of driving plates (9).

3. A distribution device for fresh cold chain distribution according to claim 2, characterized in that: The connecting mechanism comprises two groups of connecting rods (12), the two groups of connecting rods (12) are respectively arranged on the side walls of the two groups of driving plates (9), the other ends of the two groups of connecting rods (12) are each provided with a group of connecting rings (13), the inner walls of the two groups of connecting rings (13) are slidably provided with cross bars (14), both ends of the cross bars (14) are each provided with a group of fixing blocks (15), the lower end surfaces of the two groups of fixing blocks (15) are each provided on the upper end surface of the bottom plate (1), the outer walls of the two groups of connecting rings (13) are each provided with a group of first hinges (16), the two groups of the first hinges (16) are each hingedly connected to a group of connecting rods (17), and the other ends of the two groups of connecting rods (17) are hingedly connected to a second hinge (18).

4. A distribution device for fresh cold chain distribution according to claim 3, characterized in that: The pressing mechanism comprises a connecting block (19), wherein the connecting block (19) is connected to a side wall of a second hinged member (18), a lifting rod (20) is arranged on the other side wall of the connecting block (19), a group of lifting rings (21) are arranged at both ends of the lifting rod (20), a group of limiting rods (22) are slidably arranged on the inner walls of the two groups of the lifting rings (21), the lower end surfaces of the two groups of the limiting rods (22) are arranged on the upper end surface of the bottom plate (1), the upper end surfaces of the two groups of the limiting rods (22) are arranged with a group of first limiting blocks (23), and a handle (24) is arranged on the upper end surface of the lifting rod (20).

5. A distribution device for fresh cold chain distribution according to claim 2, characterized in that: A group of second limiting blocks (25) are arranged on the other end walls of the plurality of groups of fixing rods (10).

6. A distribution device for fresh cold chain distribution according to claim 2, characterized in that: The outer sliding sleeves of the plurality of groups of push rods (6) are provided with two groups of auxiliary support plates (26), the lower end surfaces of the two groups of auxiliary support plates (26) are provided with two groups of auxiliary rods (27), and the lower end surfaces of the plurality of groups of auxiliary rods (27) are respectively arranged on the upper end surfaces of both sides of the placement frame (2).

7. A distribution device for fresh cold chain distribution according to claim 1, characterized in that: Two groups of locks (28) are arranged on the front wall of the delivery box (3); a box cover (29) is rotatably arranged on the upper end of the delivery box (3); two groups of clamps (30) are arranged on the front wall of the box cover (29); the locks (28) and the clamps (30) are used in coordination.

8. A distribution device for fresh cold chain distribution according to claim 1, characterized in that: A mounting plate (31) is connected to one side wall of the bottom plate (1), a pushing member (32) is arranged on the upper end surface of the mounting plate (31), and a rubber sleeve rod (33) is sleeved on the outer wall of the pushing member (32).

9. A distribution device for fresh cold chain distribution according to claim 1, characterized in that: A set of automatic brake wheels (34) are arranged at the four corners of the lower end surface of the base plate (1).

10. A method for fresh cold chain delivery, characterized in that: Applied to the distribution device according to any one of claims 1 to 9 above, the distribution method comprises the following steps: Step 1: Open the box cover (29) by using two sets of locks (28) and clamps (30), place the fresh products to be delivered inside the delivery box (3), and then fix the box cover (29) on the delivery box (3) by using the locks (28) and clamps (30), so as to seal and preserve the fresh products; Step 2: Then, by pushing the rubber sleeve rod (33), the bottom plate (1) is pushed in cooperation with the pushing member (32) and the multiple sets of automatic brake wheels (34), so that the delivery box (3) can be moved to complete the delivery of fresh products; Step 3: When the delivery box (3) needs to be cleaned after being used for a long time, the lifting rod (20) can be pressed downward by the handle (24), and the lifting rod (20) moves downward under the cooperation of the lifting ring (21) and the limit rod (22), and the lifting rod (20) drives the second hinge (18) to move downward through the connecting block (19), and the second hinge (18) drives the two groups of first hinges (16) to move through the connecting rod (17), and the two groups of first hinges (16) drive the two groups of connecting rings (13) to slide on the outer wall of the cross bar (14), so that the two groups of connecting rings (13) slide to both sides, thereby driving the two groups of driving plates (9) to move through the two groups of connecting rods (12); Step 4: The two groups of driving plates (9) drive the two groups of pushing plates (7) to move through the supporting plates (8), and the pushing plates (7) drive the two groups of card plates (5) to move through the multiple groups of pushing rods (6), so that the two groups of card plates (5) are separated from the inside of the two groups of card slots (4), thereby releasing the fixation of the delivery box (3), facilitating the disassembly of the delivery box (3), and facilitating the cleaning of the inside of the delivery box (3); Step 5. When installing the cleaned delivery box (3), repeat the above steps, press the lifting rod (20) through the handle (24) to move the two sets of card plates (5), and then release the handle (24) to reset the two sets of drive plates (9) under the elastic action of the multiple sets of springs (11), thereby driving the two sets of card plates (5) to be connected to the inner walls of the two sets of card slots (4), so as to press and fix the delivery box (3).

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