Goods channel piece, goods shelf and goods delivery device

By setting up a shipping part and pickup gap on the guide plate of the cargo rover, combined with the integrated molding process, the problem of unsmooth pickup is solved, and the pickup with a larger contact area is achieved, reducing the risk of pickup.

CN223238680UActive Publication Date: 2025-08-19BEIJING JINGDONG YUANSHENG TECH CO LTD +1
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Patent Information

Application Number
CN202422450316.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-10
Publication Date
2025-08-19
Estimated Expiration
2034-10-10

AI Technical Summary

Technical Problem

Existing cargo parts are prone to carding when picking up goods, resulting in unsmooth pickup.

Method used

A cargo path component is designed, and the delivery part and the main body part are arranged on the guide plate. The width of the delivery part is smaller than the main body part. There is a pickup gap on the delivery part. The baffle is used to block goods. The pickup mechanism provokes the goods through the gap and manufactures it in combination with an integrated molding process.

Benefits of technology

It increases the contact area between the pickup agency and the goods, reduces the chance of card-cutting and improves the smoothness and stability of pickup.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a goods channel piece, a goods shelf and a goods delivery device. The goods channel piece comprises a goods guide plate and a baffle, the goods guide plate extends in the first direction, the goods guide plate comprises a main body part and a goods outlet part which are connected with each other in the first direction, the width of the goods outlet part in the second direction is smaller than that of the main body part in the second direction, and the baffle is arranged at the end, away from the main body part, of the goods outlet part in a protruding mode. The baffle is used for blocking the goods moving to the goods outlet part, a goods taking notch is formed in the goods outlet part, and a part of structure of the goods taking mechanism can penetrate through the goods taking notch so that the goods can be driven to cross the baffle. According to the goods channel piece, the goods taking notch is formed in the goods guide plate, the contact area of the goods taking mechanism and the goods during goods taking is increased, the goods taking mechanism penetrates through the goods taking notch and can make more sufficient contact with the goods, and the probability of the goods blocking phenomenon is reduced.
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Description

Technical Field

[0001] The utility model relates to the technical field of cargo aisles, and in particular to a cargo aisle component, a shelf and a shipping device. Background Art

[0002] Aisle pieces are structural components used to temporarily store goods and enable them to move in a specific direction. With the development of automated warehousing technology, the use of aisle pieces in various equipment is becoming more and more common. When in use, adjacent aisle pieces cooperate to form an aisle. After the goods move to the delivery end of the aisle piece, they can be picked up from the aisle by the picking mechanism's picking plate. Existing picking plates are mostly long, narrow boards, and the picking slots formed between adjacent aisle pieces for the picking plates to pick up goods are mostly elongated slots of equal width. Therefore, it is very easy for the picking plates to pick up goods in an off-center manner, resulting in a problem of goods being stuck. Utility Model Content

[0003] The first purpose of the present utility model is to provide a cargo channel component, which allows a large contact area between a picking mechanism and the goods when picking up the goods, making it less likely for the goods to be stuck.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] A cargo channel component comprises: a cargo guide plate, which extends along a first direction, and comprises a main body and a delivery part that are interconnected in the first direction, the width of the delivery part in a second direction is smaller than the width of the main body in the second direction, and the first direction and the second direction are perpendicular to each other; a baffle, which is protruded at the end of the delivery part away from the main body and is used to block the goods moving to the delivery part; wherein, a picking gap is provided on the delivery part, and the picking gap is used for a part of the structure of the picking mechanism to pass through so as to lift the goods over the baffle.

[0006] Preferably, the cargo channel piece is an integrally formed piece.

[0007] Preferably, the cargo channel member further comprises a partition, which is protruded from the cargo guide plate and extends along the first direction, and the cargo guide plate is provided with the cargo picking notch on both sides of the partition.

[0008] Preferably, the cargo guide plate has a cargo guide surface for guiding the movement of the cargo, and a breaking structure is convexly provided on the cargo guide surface, and the breaking structure can abut against a portion of the bottom surface of the cargo.

[0009] Preferably, the piercing structure includes piercing ribs extending along the first direction; and / or the piercing structure includes a plurality of piercing protrusions arranged at intervals.

[0010] Preferably, the cargo guide plate has a cargo guide surface for guiding the movement of cargo, and the cargo channel member further includes a reinforcement structure, which is arranged on a side of the cargo guide plate away from the cargo guide surface.

[0011] Preferably, the reinforcement structure includes a first rib and a second rib arranged crosswise.

[0012] Preferably, the cargo channel member further includes a positioning identification structure, which is provided at the delivery end of the cargo guide plate and is used for the cargo pickup mechanism to identify and locate the cargo.

[0013] Preferably, the delivery portion further includes a first entity portion formed between the pickup notch and the baffle; and / or, the delivery portion further includes a second entity portion formed between the pickup notch and the main body portion.

[0014] The second object of the present invention is to provide a shelf that allows for smooth unloading and prevents goods from becoming stuck.

[0015] A shelf comprises at least two of the above-mentioned cargo aisle pieces, at least two of the cargo aisle pieces are arranged side by side in the second direction, and a cargo pickup slot structure is formed between the delivery parts on the two adjacent cargo aisle pieces, and the cargo pickup slot structure includes a first cargo pickup slot formed by splicing two of the above-mentioned cargo pickup notches.

[0016] The third object of the present invention is to provide a shipping device that can ship goods smoothly and is not prone to getting stuck.

[0017] To achieve this purpose, the present invention adopts the following technical solutions:

[0018] A delivery device includes a picking mechanism and the above-mentioned shelf, the picking mechanism includes a picking pick, the picking pick includes a first pick and a second pick connected at an angle, the first pick passes through the first picking slot; the delivery part also includes a first solid part located between the picking notch and the baffle, a second picking slot connected to the first picking slot is formed between the first solid parts on the two adjacent cargo channel parts, and the second pick passes through the second picking slot.

[0019] Beneficial effects of the utility model:

[0020] The cargo lane provided by the utility model is an integrally formed part, and includes a cargo guide plate, which extends along a first direction and includes a main body and a delivery portion interconnected in the first direction. The width of the delivery portion in a second direction is smaller than the width of the main body in the second direction. A baffle is protruding from the end of the delivery portion away from the main body to block cargo moving to the delivery portion. The delivery portion is provided with a pickup notch, which is used to allow a portion of the pickup mechanism to pass through to lift the cargo over the baffle. By forming the pickup notch on the cargo guide plate, the cargo lane increases the contact area between the pickup mechanism and the cargo when picking up the cargo. The pickup mechanism can more fully contact the cargo through the pickup notch, thereby reducing the probability of cargo jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the cargo channel provided by the utility model;

[0022] Figure 2 yes Figure 1 A magnified view of the middle part of the structure;

[0023] Figure 3 This is a top view of the cargo channel provided by the present utility model;

[0024] Figure 4 yes Figure 3 A magnified view of the middle part of the structure;

[0025] Figure 5 This is a bottom view of the cargo channel provided by the present utility model;

[0026] Figure 6 This is a schematic diagram of the cooperation between the two cargo lanes and the cargo pickup mechanism provided by the present invention;

[0027] Figure 7 yes Figure 6 A magnified view of the middle structure.

[0028] In the picture:

[0029] 100. Cargo lane parts;

[0030] 110, cargo guide plate; 111, main body; 112, delivery portion; 1121, first physical portion; 1122, second physical portion; 1101, first cargo guide portion; 1102, second cargo guide portion; 101, cargo removal notch; 102, connection hole; 120, partition; 130, positioning and identification structure; 140, baffle; 150, reinforcement structure; 151, first rib; 152, second rib; 160, air-breaking rib; 170, mounting bracket; 171, first plate; 172, second plate;

[0031] 200, pick up the piece; 210, first pick piece; 220, second pick piece;

[0032] 10. Pick-up slot structure; 11. First pick-up slot; 12. Second pick-up slot; 13. Third pick-up slot. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0034] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0037] like Figures 1 to 5As shown, the utility model discloses a cargo aisle 100, which is used to form a shelf, and the shelf is used to support goods and guide the movement of goods. Specifically, the cargo aisle 100 includes a cargo guide plate 110 and a baffle 140, and the cargo guide plate 110 is extended along the first direction. The cargo guide plate 110 includes a main body 111 and a delivery part 112 that are interconnected in the first direction, and the width of the delivery part 112 in the second direction is smaller than the width of the main body 111 in the second direction. The first direction and the second direction are perpendicular to each other. The first direction is as shown in FIG. Figure 1 The a direction is shown in the second direction. Figure 1 As shown in the direction b in FIG. A baffle 140 is provided protruding from the end of the delivery portion 112 away from the main body 111 to block goods from moving into the delivery portion 112. The delivery portion 112 is provided with a pickup notch 101, which allows a portion of the pickup mechanism to pass through and lift goods over the baffle 140.

[0038] like Figure 6 and Figure 7 As shown, the present invention further discloses a shelf, which includes at least two cargo aisle members, which are arranged side by side in a second direction. The two adjacent cargo aisle members can form a cargo aisle, and the delivery portions 112 of the two adjacent cargo aisle members can form a cargo pickup slot structure 10. The cargo pickup slot structure 10 includes a first cargo pickup slot 11 formed by splicing two adjacent cargo pickup notches 101.

[0039] The cargo channel 100 further reduces the width of the upper structure of the delivery part 112 by setting a pickup notch 101 on the delivery part 112. Therefore, when the adjacent delivery parts 112 cooperate to form the pickup slot structure 10, the formation of the first pickup slot 11 can increase the area of the pickup slot structure 10, so that the pickup mechanism can have a larger contact area with the goods when picking up the goods, and the pickup mechanism can have more sufficient contact with the goods, so that the support of the goods by the pickup mechanism and the pickup operation are more stable, and the goods can be taken away by the pickup mechanism according to the expected trajectory, reducing the chance of goods getting stuck.

[0040] Continue to refer to Figure 4 As shown, the delivery part 112 also includes a first entity part 1121 formed between the pickup notch 101 and the baffle 140. The first entity part 1121 can support the goods. Since the width of the delivery part 112 at any place is smaller than the width of the main body 111, when the adjacent delivery parts 112 cooperate to form the pickup slot structure 10, a second pickup slot 12 can be formed between the adjacent first entity parts 1121. The formation of the second pickup slot 12 further increases the area of the pickup slot structure 10, so that the pickup mechanism can have a larger contact area with the goods when picking up the goods.

[0041] Continue to refer to Figure 4 As shown, the delivery part 112 also includes a second physical part 1122 formed between the pickup notch 101 and the main body 111. The second physical part 1122 can support the goods. Since the width of the delivery part 112 at any location is smaller than the width of the main body 111, when the adjacent delivery parts 112 cooperate to form the pickup slot structure 10, a third pickup slot 13 can be formed between the adjacent second physical parts 1122. The formation of the third pickup slot 13 further increases the area of the pickup slot structure 10, so that the pickup mechanism can have a larger contact area with the goods when picking up the goods.

[0042] The width of the first solid portion 1121 in the second direction and the width of the second solid portion 1122 in the second direction may be equal or different.

[0043] Of course, in other embodiments, the number of pickup gaps 101 can also be set to multiple according to needs, and multiple pickup gaps 101 are arranged at intervals on the delivery part 112, thereby further increasing the area of the final pickup slot structure 10.

[0044] In order to facilitate installation, the guide plate 110 is set to a symmetrical structure, the symmetry axis of the guide plate 110 is parallel to the first direction, and the two sides of the guide plate 110 in the second direction are respectively formed with a take-out notch 101. This arrangement allows any two cargo lanes 100 to be used in conjunction.

[0045] Continue to refer to Figure 1 As shown, the aisle member 100 further includes a partition 120 extending in a first direction and protruding from the cargo guide plate 110. The cargo guide plate 110 includes a first cargo guide portion 1101 and a second cargo guide portion 1102 located on either side of the partition 120. In two adjacent aisle members 100, the first cargo guide portion 1101 of one aisle member 100 and the second cargo guide portion 1102 of the other aisle member 100 cooperate to form a wider aisle.

[0046] The cargo guide plate 110 has a cargo guide surface for guiding the movement of goods. Generally, the cargo channel 100 is tilted so that the cargo guide surface has a certain slope. The cargo guide surface is a smooth surface. Under the action of its own gravity, the goods can automatically move along the cargo guide surface to the cargo guide plate 110 at the lower delivery portion 112. However, there is a situation where the vacuum adsorption caused by the increase in humidity on the cargo guide surface or the increase in humidity on the surface of the goods makes it impossible for the goods to slide to the delivery portion 112. In order to solve this problem, in some embodiments, a convex air-breaking structure is provided on the cargo guide surface, and the air-breaking structure can abut against part of the bottom surface of the goods. The setting of the air-breaking structure makes the cargo guide plate 110 uneven, thereby destroying the conditions for forming vacuum adsorption, so that the goods cannot be retained on the cargo guide plate 110 due to vacuum adsorption.

[0047] In a specific embodiment, Figure 2 As shown, the air-breaking structure includes air-breaking ribs 160 extending along the first direction. Optionally, there are multiple air-breaking ribs 160, and the multiple air-breaking ribs 160 are spaced apart in the second direction. Optionally, the cross-section of the air-breaking ribs 160 is circular, square, semicircular, etc.

[0048] In another specific embodiment, the breaking structure includes a plurality of breaking protrusions arranged at intervals. The plurality of breaking protrusions can be arranged at intervals in the first direction, or can be arranged in rows and columns on the product guide surface, or can be arranged in a staggered manner on the product guide surface.

[0049] Continue to refer to Figure 5 As shown, the cargo aisle 100 further includes a reinforcement structure 150, which is disposed on the side of the cargo guide plate 110 facing away from the cargo guide surface. The provision of the reinforcement structure 150 can enhance the structural strength of the cargo guide plate 110, thereby increasing the structural strength of the cargo aisle 100 and making the cargo aisle 100 less susceptible to deformation.

[0050] In some embodiments, the reinforcement structure 150 includes a first rib 151 and a second rib 152 arranged crosswise. Optionally, the first rib 151 and the second rib 152 intersect perpendicularly. In one embodiment, the first rib 151 extends along a first direction, and the second rib 152 extends along a second direction. In one embodiment, a plurality of first ribs 151 are provided, and the plurality of first ribs 151 are arranged at intervals in the second direction; a plurality of second ribs 152 are provided, and the plurality of second ribs 152 are arranged at intervals in the first direction, and the plurality of first ribs 151 and the plurality of second ribs 152 intersect perpendicularly to form a grid.

[0051] Continue to refer to Figure 2 As shown, the cargo channel 100 also includes a positioning identification structure 130, which is located at the delivery end of the cargo guide 110 and is used by the pickup mechanism to identify and locate the cargo. Optionally, the positioning identification structure 130 is a QR code containing location information and cargo information. A scanning device on the pickup mechanism can determine whether the cargo has been moved to the target location by scanning the QR code. Optionally, the positioning identification structure 130 is located on the baffle 140.

[0052] In order to facilitate the installation of the cargo channel 100, continue to refer to Figure 1As shown, a connecting hole 102 is further provided on the guide plate 110, and a connecting piece is fixed to the external structure after passing through the connecting hole 102, so as to achieve the fixation of the cargo track 100. Optionally, a plurality of connecting holes 102 are provided, and each connecting hole 102 is provided for a connecting piece to pass through. In one embodiment, four connecting holes 102 are provided on the guide plate 110, and two connecting holes 102 are respectively provided on the first cargo guide part 1101 and the second cargo guide part 1102, and each two connecting holes 102 are spaced apart in the first direction, and of the two connecting holes 102 on the first cargo guide part 1101, one is provided at one end of the first cargo guide part 1101 in the first direction, and the other is provided at the other end of the first cargo guide part 1101 in the first direction, and of the two connecting holes 102 on the second cargo guide part 1102, one is provided at one end of the second cargo guide part 1102 in the first direction, and the other is provided at the other end of the second cargo guide part 1102 in the first direction.

[0053] The cargo channel 100 is generally installed on the external structure at an angle, so that the cargo guide plate 110 has a certain slope, and the delivery end of the cargo guide plate 110 is at a low position, such as Figure 1 As shown, a mounting bracket 170 is installed at the upper replenishment end of the guide plate 110. Mounting bracket 170 is used to mount a light strip or positioning code to facilitate replenishment. Specifically, during manual replenishment, the light strip illuminates to remind staff of the specific location of the aisle that needs replenishment. The positioning code facilitates the precise docking of the replenishment device with the aisle, allowing the replenishment device to automatically replenish the aisle.

[0054] Optionally, the mounting frame 170 includes a first plate 171 and a second plate 172 connected to each other. The first plate 171 extends in a first direction, and the second plate 172 extends in a second direction. The second plate 172 is connected to the end of the cargo guide plate 110 via the second plate 172. A light strip or positioning code can be provided on the second plate 172. Optionally, multiple first plates 171 are provided, and multiple first plates 171 are connected to the second plate 172 at intervals. Multiple first plates 171 are simultaneously fixed to the end surface of the cargo channel 100.

[0055] Furthermore, in existing technology, aisle components are typically manufactured from sheet metal through processes such as bending and welding. However, bending sheet metal is expensive, and the resulting aisle components are limited in size, reaching only about 1 meter in width and 2 meters in height. If the size of the aisle components were to increase further, not only would manufacturing become more difficult, but costs would also increase dramatically.

[0056] In order to solve this problem, in the present invention, the aisle piece 100 is an integrally molded piece. The aisle piece 100 is manufactured by adopting an integral molding process, which not only reduces the manufacturing cost of the aisle piece 100, but also enables it to be made into a structural piece with a wider or taller size. It should be noted that the aisle piece 100 can be integrally molded by an injection molding process, or it can be integrally molded by 3D printing technology. When the aisle piece 100 is manufactured by an integral molding process, a plastic material can be used as the manufacturing material of the aisle piece 100, such as PP (polypropylene plastic); a metal material can also be used as the manufacturing material of the aisle piece 100.

[0057] The utility model also discloses a delivery device, which includes a pickup mechanism and the above-mentioned shelf. By using the above-mentioned cargo channel 100, the delivery device has low cost, smooth delivery, and is not prone to jamming.

[0058] Optionally, the picking mechanism includes a picking piece 200 and a driving mechanism for driving the picking piece 200 to move. Figure 6 and Figure 7 As shown, the picking piece 200 includes a first picking piece 210 and a second picking piece 220 connected at an angle. The first picking piece 210 can move along the third direction to pass through the first picking slot 11, and the second picking piece 220 can move along the third direction to pass through the second picking slot 12. The driving mechanism is connected to the picking piece 200 and is used to drive the picking piece 200 to move in the third direction. The driving mechanism can be an existing component that can output linear motion, such as a combination of a motor and a gear rack, a combination of a motor and a synchronous belt mechanism, a linear motor, a cylinder, etc., as long as it can drive the picking piece 200 to move. The third direction is as shown in FIG. Figure 1 As shown in the c direction, it should be noted that the third direction can be set perpendicular to the first direction and the second direction, or can form other angles with the first direction and the second direction.

[0059] In addition, the shape and structure of the picking pick 200 can also be adjusted according to needs, and is not limited to including only the first picking pick 210 and the second picking pick 220. As long as it can pass through the picking slot structure 10 and can make sufficient and large-area contact with the goods to facilitate accurate picking, it will be sufficient.

[0060] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A cargo channel component, characterized in that: include: A cargo guide plate (110), the cargo guide plate (110) extending along a first direction, the cargo guide plate (110) comprising a main body (111) and a delivery portion (112) connected to each other in the first direction, the delivery portion (112) having a width in a second direction smaller than a width of the main body (111) in the second direction, the first direction and the second direction being perpendicular to each other; a baffle (140), the baffle (140) being protrudingly provided at an end of the delivery portion (112) away from the main body (111) and being used to block goods moving to the delivery portion (112); The delivery portion (112) is provided with a pickup gap (101), and the pickup gap (101) is used for allowing a part of the pickup mechanism to pass through so as to move the goods over the baffle (140).

2. The cargo channel component according to claim 1, characterized in that: The cargo channel piece is an integrally formed piece.

3. The cargo channel component according to claim 1, characterized in that: The cargo channel member further comprises a partition (120), wherein the partition (120) is protruding from the cargo guide plate (110) and extends along the first direction, and the cargo guide plate (110) is provided with the cargo picking notches (101) on both sides of the partition (120).

4. The cargo channel component according to claim 1, characterized in that: The cargo guide plate (110) has a cargo guide surface for guiding the movement of cargo, and a breakout structure is convexly provided on the cargo guide surface, and the breakout structure can abut against a portion of the bottom surface of the cargo.

5. The cargo channel component according to claim 4, characterized in that: The air-breaking structure includes air-breaking ribs (160) extending along the first direction; And / or, the piercing structure includes a plurality of piercing protrusions arranged at intervals.

6. The cargo channel component according to claim 1, characterized in that: The cargo guide plate (110) has a cargo guide surface for guiding the movement of cargo, and the cargo channel member further includes a reinforcing structure (150). The reinforcing structure (150) is arranged on a side of the cargo guide plate (110) away from the cargo guide surface.

7. The cargo channel component according to claim 1, characterized in that: The cargo channel member further comprises a positioning identification structure (130), which is arranged at the delivery end of the cargo guide plate (110) and is used for the cargo pickup mechanism to identify and locate the cargo.

8. The cargo channel component according to any one of claims 1 to 7, characterized in that: The delivery portion (112) further includes a first solid portion (1121) formed between the pickup notch (101) and the baffle (140); And / or, the delivery portion (112) further includes a second entity portion (1122) formed between the pickup notch (101) and the main body portion (111).

9. A shelf, characterized in that: The invention comprises at least two cargo lane pieces according to any one of claims 1 to 8, wherein at least two of the cargo lane pieces are arranged side by side in the second direction, and a cargo pickup slot structure (10) is formed between the delivery portions (112) on the two adjacent cargo lane pieces, and the cargo pickup slot structure (10) comprises a first cargo pickup slot (11) formed by splicing two of the cargo pickup notches (101).

10. A delivery device, characterized in that: The invention comprises a picking mechanism and the shelf as claimed in claim 9, wherein the picking mechanism comprises a picking piece (200), the picking piece (200) comprises a first picking piece (210) and a second picking piece (220) connected at an angle, and the first picking piece (210) passes through the first picking slot (11); The delivery portion (112) further includes a first solid portion (1121) located between the pickup notch (101) and the baffle (140), and a second pickup slot (12) connected to the first pickup slot (11) is formed between the first solid portions (1121) on two adjacent cargo channel members, and the second picking piece (220) passes through the second pickup slot (12).