Transfer device for a conveyor system

Abstract

The utility model discloses a kind of transfer devices for conveying system, including mobile trolley, conveying line, transfer assembly;Mobile trolley is provided with stacking area one and stacking area two;Stacking area one is made of a group of stacking units, and the area of each group of stacking units is adjustable;Stacking area two includes stacking unit;The outside of feeding stacking unit is provided with temporary storage mechanism, which moves up the product in feeding stacking unit;Transfer assembly at least includes first adsorption module and second adsorption module;First adsorption module and second adsorption module simultaneously respectively suck the product in stacking unit and feeding stacking unit, and place it in conveying line by moving.The different types of products are placed in mobile trolley by area, and different adsorption modules arranged on the same transfer assembly simultaneously adsorb different types of products to be placed in the same conveying line for conveying, effectively avoid product type confusion, and parallel processing the conveying of multiple different types of products, improve conveying efficiency and the throughput of overall production line.

Description

Technical Field

[0001] This utility model relates to the field of material conveying technology, and in particular to a transfer device for a conveying system. Background Technology

[0002] In industrial production, especially in flexible manufacturing involving multiple varieties and small batches, automated product transport using conveyor lines is a common production process. However, when a production line needs to handle two or more different product models, the existing conventional practice is to use a sequential conveying mode to avoid confusion and mishandling of different models during transport, sorting, or subsequent packaging. That is, the conveyor line strictly follows the batch sequence; only after all products of one model have been transported and processed can the line switch to and transport the next model. While this "batch processing" conveying method can effectively avoid product mixing, it is essentially a serial operation, causing the conveyor line to serve only a single product model for most of the time. It cannot achieve parallel transport and processing of multiple product models, thus resulting in inherent drawbacks such as low conveying efficiency and low overall throughput of the production line.

[0003] To overcome the aforementioned efficiency bottlenecks, a direct solution in existing technology is to add independent conveyor lines for different product models. By assigning different product models to different conveyor lines, physical isolation and parallel transport are achieved, theoretically improving work efficiency. However, this solution has significant limitations: First, adding extra conveyor lines directly increases the costs of equipment purchase, installation, and subsequent maintenance, raising the company's capital investment; second, the layout of multiple conveyor lines occupies a large amount of production space, which is often difficult to implement for small and medium-sized workshops and factories with limited space resources or budgets, severely restricting its applicability.

[0004] Therefore, the lack of a solution in the existing technology that can achieve efficient, accurate and parallel transportation of multiple product models on a single conveyor line at a low cost has become a key issue restricting the improvement of automation level and efficiency in small and medium-sized production units. Utility Model Content

[0005] The purpose of this invention is to solve the above-mentioned problems existing in the prior art and to provide a transfer device for a conveying system.

[0006] The objective of this utility model is achieved through the following technical solution: A transfer device for a conveying system includes a mobile cart for storing two different sizes, a conveyor line disposed outside the mobile carts, and a transfer assembly that moves back and forth between the mobile carts and the conveyor line. The mobile carts are provided with a first stacking area and a second stacking area for placing products of different sizes. The first stacking area consists of a set of stacking units carrying products, and the area of ​​each stacking unit is adjustable. The second stacking area includes at least one loading stacking unit storing products. A temporary storage mechanism is disposed outside the loading stacking unit, which moves the products within the loading stacking unit upwards. The transfer assembly includes at least a first adsorption module and a second adsorption module for gripping different products. The first adsorption module and the second adsorption module simultaneously pick up the products from the stacking units and the loading stacking units, respectively, move them, and place them on the conveyor line. Subsequently, the products in the first and second stacking areas are gradually moved upwards until all products in the first and second stacking areas are placed on the conveyor line.

[0007] Preferably, the mobile trolley includes a first support frame, and the stacking area is mounted on the first support frame via a base plate, and includes a material carrier plate parallel to the upper surface of the base plate, a set of positioning rods and limiting rods penetrating the material carrier plate; the area enclosed by the positioning rods and the limiting rods on the material carrier plate forms the stacking unit; the limiting rods move relative to the positioning rods along the X-axis and / or Y-axis to adjust the area of ​​the stacking unit according to the product size.

[0008] Preferably, the limiting rod includes an X-axis limiting rod; the X-axis limiting rod is driven by an X-axis transfer assembly disposed on the base plate; the X-axis transfer assembly includes an X-axis power source, an X-axis guide rod, and an X-axis moving plate for setting the limiting rod; the X-axis moving plate is slidably disposed on the X-axis guide rod and is driven by the X-axis power source to move along the length direction of the material carrier plate.

[0009] Preferably, the limiting rod further includes a Y-axis adjusting rod; the Y-axis adjusting rod is driven by a Y-axis transfer assembly disposed on the base plate; the Y-axis transfer assembly includes a Y-axis power source, a Y-axis guide rod, and a Y-axis moving plate for setting the Y-axis adjusting rod; the Y-axis moving plate is slidably connected to the Y-axis guide rod and is driven by the Y-axis power source to move along the width direction of the bearing plate; the X-axis limiting rod and the Y-axis adjusting rod do not interfere with each other.

[0010] Preferably, the mobile trolley further includes a second support frame, on which the second support frame is provided the second stacking area, and on which the second stacking area is provided a positioning block. The rectangular area enclosed by a group of the positioning blocks on the second support frame is the material loading and stacking unit.

[0011] Preferably, there are two feeding and stacking units, and each feeding and stacking unit corresponds to one temporary storage mechanism; the temporary storage mechanism includes a lifting module and a support arm slidably disposed on the lifting module; there are two support arms and they are perpendicular to the lifting module, and the distance between the two support arms located in the same lifting module is less than the width of the feeding and stacking unit.

[0012] Preferably, a transfer component is disposed above the second stacking area and the temporary storage mechanism, and reciprocates between the two support arms to move an empty material tray in the feeding stacking unit to another feeding stacking unit for placing products; the transfer component includes a transverse moving module disposed along the width direction of the conveyor line and a material suction cup frame that moves along the setting direction of the transverse moving module; the material suction cup frame is provided with a set of suction elements for adsorbing the material tray.

[0013] Preferably, the transfer assembly further includes a linear module, on which the first adsorption module and the second adsorption module are disposed; the first adsorption module includes a first suction cup frame fixed to the linear module and a set of first adsorption components fixed to the first suction cup frame; the second adsorption module includes a transverse slide rail fixed to the linear module, a second suction cup frame slidably disposed on the transverse slide rail, and a set of second adsorption components fixed to the second suction cup frame; the first adsorption components and the second adsorption components are located on both sides of the linear module.

[0014] Preferably, the spacing between a group of the first adsorption elements arranged along the running direction of the conveyor line is adjustable.

[0015] Preferably, the conveyor line includes a conveyor motor, conveyor rollers, and a set of first sensors disposed between two adjacent conveyor rollers; the first sensors disposed along the axial direction of the conveyor rollers are spaced apart, and each first sensor corresponds to a product adsorbed on the first adsorption member; an ultrasonic sensor for detecting the thickness of the product is also disposed near the output end of the conveyor line, and the quantity of the currently conveyed product is determined based on the detected thickness to determine whether the product is stacked.

[0016] The advantages of this utility model's technical solution are mainly reflected in: Different types of products are placed on mobile carts, and different adsorption modules set on the same transfer component simultaneously adsorb different types of products and place them on the same conveyor line for transportation. This "batch processing" transportation method can effectively avoid product type confusion and can handle the transportation of multiple different types of products in parallel, thereby improving transportation efficiency and the overall throughput of the production line. The stacking area on the mobile cart can be adjusted according to product needs, offering high flexibility and a wide range of applicable products. The conveyor line is equipped with ultrasonic sensors to determine the quantity of products being conveyed, thereby identifying any stacking of products. This ensures that each product is effectively conveyed, preventing product confusion or omission and improving conveying reliability. Attached Figure Description

[0017] Figure 1 : A perspective view of the mobile trolley according to a preferred embodiment of the present invention; Figure 2 : A top view of the mobile trolley according to a preferred embodiment of the present invention; Figure 3 : Structural diagram of the X-axis transfer assembly of a preferred embodiment of this utility model; Figure 4 : Structural diagram of the Y-axis transfer assembly of a preferred embodiment of this utility model; Figure 5 : A perspective view of a preferred embodiment of the present invention; Figure 6 Top view of a preferred embodiment of this utility model; Figure 7 : A perspective view of the temporary storage mechanism of a preferred embodiment of this utility model; Figure 8 : A perspective view of the transfer component of a preferred embodiment of this utility model; Figure 9 : A perspective view of the transfer component of a preferred embodiment of this utility model; Figure 10 : A perspective view of the conveyor line of a preferred embodiment of this utility model. Detailed Implementation

[0018] The purpose, advantages, and features of this utility model will be illustrated and explained through the following non-limiting description of preferred embodiments. These embodiments are merely typical examples of applying the technical solutions of this utility model, and all technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by this utility model.

[0019] In the description of the solution, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Also, in the description of the solution, with the operator as a reference, the direction closer to the operator is the proximal end, and the direction farther from the operator is the distal end.

[0020] This utility model discloses a transfer device for a conveying system, including as follows: Figure 1 The image shows a mobile cart 1 used to store two different sizes. (Example) Figures 1 to 2 As shown, the mobile trolley 1 is equipped with a stacking area 11 and a stacking area 12 for placing products of different sizes. The stacking area 11 consists of a set of stacking units 111 that carry products, and the area of ​​the set of stacking units 111 is adjustable. The stacking area 12 includes at least one loading and stacking unit 121 that stores products.

[0021] Specifically, such as Figure 1 As shown, the mobile trolley 1 includes a first support frame 101. The stacking area 11 is mounted on the first support frame 101 via a base plate 110 and includes a material carrier plate 112 parallel to the upper surface of the base plate 110, a set of positioning rods 113 and limiting rods 114 penetrating the material carrier plate 112. The area enclosed by the positioning rods 113 and the limiting rods 114 on the material carrier plate forms the stacking unit 111.

[0022] Furthermore, the limiting rod 114 includes, as follows: Figure 3 The X-axis limiting rod 1141 is shown. The X-axis limiting rod 1141 is driven by an X-axis transfer assembly 115 mounted on the base plate 110. The X-axis transfer assembly 115 includes an X-axis power source 1151, an X-axis guide rod 1152, and an X-axis moving plate 1153 for mounting the limiting rod 1141. The X-axis moving plate 1153 is slidably mounted on the X-axis guide rod 1152 and is driven by the X-axis power source 1151 to move along the length direction of the loading plate. In this invention, the X-axis refers to the width direction of the moving trolley 1.

[0023] Further, such as Figure 4As shown, the limiting rod 114 further includes a Y-axis adjusting rod 1142. The Y-axis adjusting rod 1142 is driven by a Y-axis transfer assembly 116 disposed on the base plate 110. The Y-axis transfer assembly 116 includes a Y-axis power source 1161, a Y-axis guide rod 1162, and a Y-axis moving plate 1163 for setting the Y-axis adjusting rod 1142. The Y-axis moving plate 1163 is slidably connected to the Y-axis guide rod 1162 and is driven by the Y-axis power source 1161 to move along the width direction of the material carrier plate. The X-axis limiting rod 1141 and the Y-axis adjusting rod 1142 do not interfere with each other. In this utility model, the Y-axis refers to the length direction of the moving trolley 1, that is, the forward and backward movement direction of the moving trolley. Therefore, in this utility model, the limiting rod 114 moves relative to the positioning rod 113 along the X-axis and / or Y-axis to adjust the area of ​​the stacking unit 111 according to the product size; to meet the storage and transportation needs of products of different sizes; and to improve flexibility.

[0024] like Figures 1 to 2 As shown, the mobile trolley 1 also includes a second support frame 102, on which the second support frame 102 is provided the second stacking area 12. The second stacking area 12 is provided with positioning blocks 120, and the rectangular area enclosed by a set of positioning blocks 120 on the second support frame 102 constitutes the material loading and stacking unit 121. Figures 5 to 7 As shown, a temporary storage mechanism 4 is provided on the outside of the feeding and stacking unit 121, which moves the products inside the feeding and stacking unit 221 upwards. Furthermore, preferably, there are two feeding and stacking units 121 in this invention; the number of feeding and stacking units 121 is not limited here. Each feeding and stacking unit 121 corresponds to one temporary storage mechanism 4.

[0025] Specifically, such as Figure 7 As shown, the temporary storage mechanism 4 includes a lifting module 41 and a support arm 42 slidably disposed on the lifting module 41. The lifting module 41 can be a known structure with linear movement function, such as an electric cylinder, hydraulic cylinder, or lead screw, and its specific structure will not be described here. There are two support arms 42, which are perpendicular to the lifting module 41. The distance between the two support arms 42 located on the same lifting module 41 is less than the width of the loading and stacking unit 121. The lifting module 41 drives the support arms 42 to rise and fall, thereby driving the product or loading tray placed on the support arm 42 to rise and fall, realizing the movement of the product or loading tray, facilitating the subsequent transfer of products.

[0026] A lifting detection mechanism 6 is also provided between the two temporary storage mechanisms 4. The lifting detection mechanism 6 includes a linear drive module 61 and a detection arm 62 that is vertically slidably disposed on the linear drive module 61. The structure of the linear drive module 61 is the same as that of the lifting module 41, and will not be described in detail here. The linear drive module 61 drives the detection arm 62 to reciprocate in the vertical direction. The length of the detection arm 62 is greater than the length of the bearing arm 42, and a sensor is provided at the distal end of the detection arm 62 to detect whether there are products to be transported and the first adsorption module 31 on the stacking area 11 at the current height; thereby determining whether the mobile trolley 1 needs to be moved out.

[0027] This utility model also includes a conveyor line 2 disposed outside the mobile trolley 1, and a transfer assembly 3 that reciprocates between the mobile trolley 1 and the conveyor line 2. Figure 5 and Figure 9 As shown, the transfer assembly 3 includes at least a first adsorption module 31 and a second adsorption module 32 for gripping different products. The first adsorption module 31 and the second adsorption module 32 simultaneously pick up products from the stacking unit 111 and the feeding stacking unit 121, respectively, move them, and place them on the conveyor line 2. Then, the products in the first stacking area 11 and the second stacking area 12 gradually move upwards until all products in the first stacking area 11 and the second stacking area 12 are placed on the conveyor line 2.

[0028] Specifically, such as Figure 8 As shown, the transfer assembly 3 further includes a linear module 30, which includes a Y-axis linear module arranged along the running direction of the conveyor line 2, a Z-axis linear module perpendicular to the Y-axis linear module (the Z-axis linear module is arranged vertically), and an X-axis linear module perpendicular to the Z-axis linear module; that is, the linear module 30 is a three-axis machine. The first adsorption module 31 and the second adsorption module 32 are arranged on the X-axis linear module of the linear module 30.

[0029] The first adsorption module 31 includes a first suction cup frame 310 fixed to the linear module 30 and a set of first adsorption members 311 fixed to the first suction cup frame 310. The first adsorption members 311 are preferably a set of suction nozzles, and the spacing between the set of first adsorption members 311 arranged along the running direction of the conveyor line 2 is adjustable. Specifically, each set of first adsorption members 311 is disposed on a suction nozzle mounting plate, which has a waist-shaped hole formed therein, and the length of the waist-shaped hole is less than the length of the suction nozzle mounting plate. One first adsorption member 311 is fixed to the end of the suction nozzle mounting plate away from the waist-shaped hole, and the remaining first adsorption members 311 are disposed within the waist-shaped hole and can move along the direction of the waist-shaped hole. By adjusting the spacing between the first adsorption members 311, the adsorption requirements of different products can be met, improving flexibility and applicability.

[0030] The second adsorption module 32 includes a transverse slide rail 322 fixed to the X-axis linear module of the linear module 30, a second suction cup holder 320 slidably disposed on the transverse slide rail 322, and a set of second adsorption components 321 fixed to the second suction cup holder 320. The first adsorption component 321 is preferably a vacuum suction cup assembly. A power source is provided on the transverse slide rail 322 to drive the second suction cup holder 320 to move, so that the product adsorbed by the second adsorption component 321 is effectively placed in the loading tray. Furthermore, the first adsorption component 311 and the second adsorption component 321 are located on opposite sides of the linear module 30, allowing them to move synchronously and simultaneously adsorb different types of products, thus improving transfer efficiency.

[0031] Combination Figure 5 and Figure 9 As shown, a transfer assembly 5 is disposed above the stacking area 12 and the temporary storage mechanism 4, and reciprocates between the two carrying arms 42. The transfer assembly 5 includes a transverse module 51 disposed along the width direction of the conveyor line 2 and a material suction cup frame 52 that moves along the direction of the transverse module 51. The transverse module 51 is a known structure including a drive motor and a transverse guide rail, such as an electric cylinder, lead screw, or hydraulic cylinder, which will not be described in detail here. The material suction cup frame 52 is provided with a set of suction elements 521 for adsorbing the material tray 220. The transverse module 51 drives the material suction cup frame 52 and the suction elements 521 to move along the width direction of the conveyor line, so as to move the empty material tray 220 in the loading and stacking unit 121 to another loading and stacking unit 121 to place products, or move between the two loading and stacking units 121, thereby realizing the switching of the items carried on the two loading and stacking units 121.

[0032] Combination Figure 5 and Figure 10As shown, the conveyor line 2 includes a conveyor motor 21, conveyor rollers 22, and a set of first sensors 23 disposed between two adjacent conveyor rollers 22. The first sensors 23 are spaced apart along the axial direction of the conveyor rollers 22, and each first sensor 23 corresponds to a product adsorbed on the first adsorption member 311. That is, the distance between the first sensors 23 is not less than the distance between the products adsorbed on the first adsorption member 311. When all the first sensors 23 located on the same axis parallel to the conveyor roller axis detect a signal simultaneously, it indicates that the product being conveyed is to be adsorbed by the first adsorption member 311. If not all the first sensors 23 located on the same axis parallel to the conveyor roller axis detect a signal simultaneously, but two or three consecutive first sensors 23 detect a signal simultaneously, it indicates that the product being conveyed is to be adsorbed by the second adsorption member 321.

[0033] Furthermore, an ultrasonic sensor 24 is also installed near the output end of the conveyor line 2. When a product moves to the ultrasonic sensor 24, the ultrasonic signal generated during the product conveying process is converted into an electrical signal to determine the thickness of the current product, and then the presence of stacked products is determined based on the thickness. The number of ultrasonic sensors 24 is the same as the number of the first sensors 23. When a product is conveyed to the ultrasonic sensor 24, the thickness of the current product can be detected by the ultrasonic sensor, and the number of products being conveyed can be determined based on the detected thickness to determine whether there is stacking. If stacking occurs, an alarm is triggered to alert the staff, ensuring that each product is effectively conveyed, avoiding product confusion or omission, and improving the reliability of the conveying process.

[0034] This utility model has many other embodiments. All technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A transfer device for a conveying system, characterized in that: The system includes a mobile cart (1) for storing two different sizes, a conveyor line (2) located outside the mobile cart (1), and a transfer assembly (3) that moves back and forth between the mobile cart (1) and the conveyor line (2). The mobile cart (1) is provided with a stacking area one (11) and a stacking area two (12) for placing products of different sizes. The stacking area one (11) consists of a set of stacking units (111) carrying products, and the area of ​​the set of stacking units (111) is adjustable. The stacking area two (12) includes at least one loading stacking unit (121) storing products. A temporary storage mechanism is provided outside the loading stacking unit (121). (4) The temporary storage mechanism (4) moves the products in the loading stacking unit (221) upward; the transfer component (3) includes at least a first adsorption module (31) and a second adsorption module (32) for grabbing different products; the first adsorption module (31) and the second adsorption module (32) simultaneously pick up the products in the stacking unit (111) and the loading stacking unit (121) respectively, move them and place them on the conveyor line (2); then the products in the first stacking area (11) and the second stacking area (12) are gradually moved upward until all the products in the first stacking area (11) and the second stacking area (12) are placed on the conveyor line (2).

2. The transfer device for the conveying system according to claim 1, characterized in that: The mobile trolley (1) includes a first support frame (101), and the stacking area (11) is set on the first support frame (101) via a base plate (110), and includes a material carrier plate (112) parallel to the upper surface of the base plate (110), a set of positioning rods (113) and limiting rods (114) penetrating the material carrier plate (112); the area enclosed by the positioning rods (113) and the limiting rods (114) on the material carrier plate forms the stacking unit (111); the limiting rods (114) move relative to the positioning rods (113) along the X-axis and / or Y-axis to adjust the area of ​​the stacking unit (111) according to the product size.

3. The transfer device for the conveying system according to claim 2, characterized in that: The limiting rod (114) includes an X-axis limiting rod (1141); the X-axis limiting rod (1141) is driven by an X-axis transfer assembly (115) disposed on the base plate (110); the X-axis transfer assembly (115) includes an X-axis power source (1151), an X-axis guide rod (1152) and an X-axis moving plate (1153) for setting the limiting rod (114); the X-axis moving plate (1153) is slidably disposed on the X-axis guide rod (1152) and is driven by the X-axis power source (1151) to move along the length direction of the material carrier plate.

4. The transfer device for the conveying system according to claim 3, characterized in that: The limiting rod (114) also includes a Y-axis adjusting rod (1142); the Y-axis adjusting rod (1142) is driven by a Y-axis transfer assembly (116) disposed on the base plate (110); the Y-axis transfer assembly (116) includes a Y-axis power source (1161), a Y-axis guide rod (1162) and a Y-axis moving plate (1163) for setting the Y-axis adjusting rod (1142); the Y-axis moving plate (1163) is slidably connected to the Y-axis guide rod (1162) and is driven by the Y-axis power source (1161) to move along the width direction of the loading plate; the X-axis limiting rod (1141) and the Y-axis adjusting rod (1142) do not interfere with each other.

5. The transfer device for a conveying system according to claim 4, characterized in that: The mobile trolley (1) also includes a second support frame (102), on which the second support frame (102) is provided a stacking area two (12), and on which a positioning block (120) is provided. The rectangular area enclosed by a set of positioning blocks (120) on the second support frame (102) is the material loading and stacking unit (121).

6. The transfer device for a conveying system according to claim 5, characterized in that: There are two loading and stacking units (121), and each loading and stacking unit (121) corresponds to one temporary storage mechanism (4); the temporary storage mechanism (4) includes a lifting module (41) and a support arm (42) slidably disposed on the lifting module (41); there are two support arms (42) and they are perpendicular to the lifting module (41), and the distance between the two support arms (42) located in the same lifting module (41) is less than the width of the loading and stacking unit (121).

7. The transfer device for a conveying system according to claim 6, characterized in that: A transfer component (5) is disposed above the stacking area 2 (12) and the temporary storage mechanism (4), and reciprocates between the two support arms (42) to move the empty material tray (220) in the loading stacking unit (121) to another loading stacking unit (121) to place the product; the transfer component (5) includes a transverse module (51) disposed along the width direction of the conveyor line (2) and a material suction cup frame (52) that moves along the setting direction of the transverse module (51); the material suction cup frame (52) is provided with a set of suction members (521) for adsorbing the material tray (220).

8. The transfer device for a conveying system according to claim 7, characterized in that: The transfer assembly (3) further includes a linear module (30), on which the first adsorption module (31) and the second adsorption module (32) are disposed; the first adsorption module (31) includes a first suction cup frame (310) fixed on the linear module (30) and a set of first adsorption components (311) fixed on the first suction cup frame (310); the second adsorption module (32) includes a transverse slide rail (322) fixed on the linear module (30), a second suction cup frame (320) slidably disposed on the transverse slide rail (322), and a set of second adsorption components (321) fixed on the second suction cup frame (320); the first adsorption component (311) and the second adsorption component (321) are located on both sides of the linear module (30).

9. The transfer device for a conveying system according to claim 8, characterized in that: The spacing between a group of the first adsorption elements (311) arranged along the running direction of the conveyor line (2) is adjustable.

10. The transfer device for a conveying system according to claim 9, characterized in that: The conveyor line (2) includes a conveyor motor (21), a conveyor roller (22), and a set of first sensors (23) disposed between two adjacent conveyor rollers (22); the first sensors (23) disposed along the axial direction of the conveyor rollers (22) are spaced apart, and each first sensor (23) corresponds to the product adsorbed on the first adsorption member (311); an ultrasonic sensor (24) for detecting the thickness of the product is also disposed near the output end of the conveyor line (2), and the quantity of the currently conveyed product is determined according to the detected thickness to determine whether the product is stacked.

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