Self-locking carrier for transporting FPC (Flexible Printed Circuit), lifting mechanism and circulating conveying device

By designing a self-locking vehicle and lifting mechanism for FPC transmission, the problems of FPC shifting and falling off during transmission are solved, and the stable fixation of FPC and the efficiency of processing production lines are improved.

CN222989003UActive Publication Date: 2025-06-17SHENZHEN DIMEI TECH CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422068765.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-26
Publication Date
2025-06-17
Estimated Expiration
2034-08-26

AI Technical Summary

Technical Problem

Existing FPC vehicles are difficult to ensure stable and fixed FPCs during high-speed or long-distance transmission, resulting in FPC shift or shedding, increasing the defect rate during processing and affecting the stability and efficiency of the production line.

Method used

A self-locking vehicle for transporting FPC is designed, using a self-locking mechanism and a lifting mechanism, which locks the FPC through automatic opening and downward pressure of the self-locking member, and combines the pulley and limit bar to ensure the stable and fixed FPC during transmission.

Benefits of technology

It realizes stable fixation of FPC during transmission, effectively prevents FPC from shifting and falling off, and improves the stability and production efficiency of the processing production line.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222989003U_ABST
    Figure CN222989003U_ABST
Patent Text Reader

Abstract

The utility model belongs to the technical field of PFC (Flexible Printed Circuit) processing, and particularly relates to a self-locking carrier for transporting an FPC (Flexible Printed Circuit), a lifting mechanism and a circulating conveying device. Comprising a carrier plate, and the top surface of the carrier plate is provided with a bearing area used for bearing an FPC; the self-locking mechanism is mounted on the carrier plate, the self-locking mechanism comprises a self-locking piece rotatably arranged at the edge of the bearing area, a pressing plate and a lifting block are arranged at the upper end and the lower end of the self-locking piece at a certain angle respectively, the pressing plate is located above the carrier plate, and the lifting block is located below the carrier plate; when the lifting block is jacked up, the pressing plate rotates upwards to be opened. When the lifting block is suspended, the pressing plate rotates downwards and presses the FPC located in the bearing area from the edge of the bearing area. According to the utility model, the stable fixation of the FPC in the transmission process is realized, the displacement and falling of the FPC are effectively prevented, and the stability and production efficiency of a processing production line are improved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model belongs to the technical field of PFC processing, and particularly relates to a self-locking carrier, a lifting mechanism and a circulating conveying device for transporting FPCs. Background Art

[0002] In the modern production process of flexible printed circuit boards (FPCs), efficient and stable transmission and processing are key links to ensure product quality and production efficiency. The processing procedures of FPCs are numerous, covering multiple steps from blank board loading to final chip mounting, soldering, etc., and each step needs to be executed accurately. To achieve this process, FPCs are usually placed on special carriers and transported to various processing equipment, such as printers, chip mounters, etc., through an automated track system.

[0003] However, the existing FPC carrier designs face significant challenges during transmission. Due to the thin and deformable nature of FPCs, traditional carriers often struggle to ensure the stable fixation of FPCs during high-speed or long-distance transmission, resulting in the displacement or even detachment of FPCs on the carriers. This not only increases the defect rate during the processing but also seriously affects the stability and efficiency of the entire production line.

[0004] Therefore, there is an urgent need for a self-locking carrier, a lifting mechanism and a circulating conveying device that can effectively lock FPCs during transmission to prevent their displacement. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a self-locking carrier, a lifting mechanism and a circulating conveying device for transporting FPCs in view of the deficiencies of the prior art, which realizes the stable fixation of FPCs during transmission, effectively prevents the displacement and detachment of FPCs, and improves the stability and production efficiency of the processing production line.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A self-locking carrier for transporting FPCs, comprising:

[0008] A carrier board, the top surface of the carrier board is provided with a loading area for loading FPCs;

[0009] A self-locking mechanism installed on the carrier board, the self-locking mechanism includes a self-locking member rotatably arranged at the edge of the loading area, the upper and lower ends of the self-locking member are respectively provided with a pressing plate and a lifting block at a certain angle, the pressing plate is located above the carrier board, and the lifting block is located below the carrier board; when the lifting block is lifted, the pressing plate rotates upward to open; when the lifting block is suspended, the pressing plate rotates downward and presses the FPC located in the loading area from the edge of the loading area.

[0010] Furthermore, the self-locking mechanism also includes a pulley arranged on the lifting block, which is used to indirectly lift the lifting block through the pulley.

[0011] Furthermore, the self-locking mechanism also includes a self-locking seat, which is fixedly mounted on the carrier plate, and the self-locking member is rotatably mounted on the self-locking seat.

[0012] Furthermore, a mounting groove penetrating the carrier board is provided at the edge of the carrier board, and the self-locking seat is installed at the mounting groove.

[0013] Furthermore, a limiting strip is provided around the edge of the carrying area, and the FPC placed in the carrying area will be restricted by the limiting strip and cannot move relatively to leave the carrying area.

[0014] Furthermore, a conveyor belt slot is provided on the bottom edge of the carrier plate, and when the carrier plate is placed on the conveyor belt, the conveyor belt is located in the conveyor belt slot.

[0015] The utility model also provides a lifting mechanism, including the self-locking carrier for transporting FPC, and further comprising:

[0016] Lifting track;

[0017] A lifting platform installed in the lifting track, the lifting platform can move up and down in a vertical direction along the lifting track;

[0018] A limit bracket is arranged below the lifting track. When the self-locking carrier moves toward the limit bracket until the lifting block of the self-locking mechanism contacts the limit bracket, the pressure plate rotates upward to open and unlock; when the self-locking carrier moves away from the limit bracket, the pressure plate rotates downward to lock.

[0019] Furthermore, conveyor belts are provided on both sides of the lifting platform, and the self-locking carrier is placed on the conveyor belts.

[0020] The utility model also provides a circulating conveying device, comprising the above-mentioned lifting mechanism, and further comprising:

[0021] A loading mechanism and a unloading mechanism, wherein the loading mechanism and the unloading mechanism are both provided with the lifting mechanism;

[0022] A loading track and a carrier return track are connected between the loading mechanism and the unloading mechanism, wherein the loading track is connected to the lower ends of the two lifting mechanisms, and the carrier return track is connected to the upper ends of the two lifting mechanisms.

[0023] Furthermore, an adsorption mechanism is provided in the loading mechanism and the unloading mechanism for adsorbing and moving the FPC onto the self-locking carrier or removing the FPC from the self-locking carrier.

[0024] Beneficial effects of the utility model:

[0025] The utility model provides a self-locking mechanism, and the self-locking part can automatically open when the lifting block is lifted up, and automatically press down to lock the FPC when the lifting block is suspended, thereby realizing stable fixation of the FPC during transmission; by providing a pulley, the friction force directly acting on the lifting block is reduced, making the lifting action smoother and more stable; by providing an installation groove and a self-locking seat, the space of the carrier plate is saved, and the installation, debugging and maintenance of the self-locking part are convenient; by providing a limit strip, the FPC is effectively prevented from being separated from the load-bearing area due to external force during transmission; by providing a conveyor belt slot, the carrier plate can be more stably matched with the conveyor belt when placed on it; by combining a lifting mechanism and a self-locking carrier, automatic transmission of the FPC at different heights is realized; by providing a loading mechanism, a unloading mechanism, a loading track and a carrier return track, seamless connection and automatic flow of the FPC in the entire processing flow are realized; the utility model realizes stable fixation of the FPC during transmission, effectively prevents the displacement and falling off of the FPC, and improves the stability and production efficiency of the processing production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 It is a structural schematic diagram of the self-locking carrier of the utility model;

[0027] Attached Figure 2 It is a structural schematic diagram of the self-locking carrier of the utility model;

[0028] Attached Figure 3 It is a structural schematic diagram of the self-locking mechanism of the utility model;

[0029] Attached Figure 4 It is a structural schematic diagram of the lifting mechanism of the utility model;

[0030] Attached Figure 5 It is a structural schematic diagram of the feeding mechanism of the utility model;

[0031] Attached Figure 6 It is a structural schematic diagram of the circulating conveying device of the utility model;

[0032] Identifications in the figure: 1 - self-locking carrier, 110 - carrier plate, 111 - loading area, 112 - installation groove, 113 - limiting strip, 114 - conveyor belt slot, 120 - self-locking mechanism, 121 - self-locking part, 1211 - pressing plate, 1212 - lifting block, 122 - pulley, 123 - self-locking seat; 2 - lifting mechanism, 210 - lifting track, 220 - lifting platform, 221 - conveyor belt, 230 - limiting bracket; 3 - loading mechanism; 4 - unloading mechanism; 5 - loading track; 6 - carrier return track; 7 - adsorption mechanism; 8 - printing machine; 9 - mounter. Detailed implementation mode

[0033] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, but should not be construed as a limitation to the present invention.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0036] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Refer to the attached Figure 1 to the attached Figure 6, The figure shows a specific embodiment of a self-locking carrier, a lifting mechanism, and a circulating conveyor for transporting FPCs provided by the present utility model. Embodiment

[0038] Refer to the appendix Figure 1 and the appendix Figure 3 , This embodiment provides a self-locking carrier for transporting FPCs, including:

[0039] A carrier board 110, on the top surface of the carrier board 110, there is a loading area 111 for loading FPCs;

[0040] A self-locking mechanism 120 installed on the carrier board 110, the self-locking mechanism 120 includes a self-locking member 121 rotatably arranged at the edge of the loading area 111. At the upper and lower ends of the self-locking member 121, there are respectively a pressing plate 1211 and a lifting block 1212 at an angle. The pressing plate 1211 is located above the carrier board 110, and the lifting block 1212 is located below the carrier board 110; when the lifting block 1212 is lifted, the pressing plate 1211 rotates upward to open; when the lifting block 1212 is suspended, the pressing plate 1211 rotates downward and presses the FPC located in the loading area 111 from the edge of the loading area 111.

[0041] Refer to the appendix Figure 1 and the appendix Figure 3 , In the above embodiment, the self-locking mechanism 120 of the carrier board 110 realizes self-locking based on gravity. During use, a structure for lifting the lifting block 1212 can be set on the track corresponding to the self-locking carrier 1, such as being respectively set at the loading position and the unloading position. When the self-locking carrier 1 is at the loading position, the lifting block 1212 is in the lifted state, and the pressing plate 1211 is opened. At this time, the FPC can be placed in the loading area 111 on the carrier board 110; when the self-locking carrier 1 moves, the lifting block 1212 is suspended, and under the action of gravity, the pressing plate 1211 presses down on the FPC, fixing the FPC on the carrier board 110 to achieve self-locking. In this embodiment, at least two sides of the carrier board 110 are provided with the self-locking mechanism 120 to press and fix both sides of the FPC. Due to the downward pressure of the pressing plate 1211, it ensures the stable fixation of the FPC during transmission, effectively preventing the displacement and falling off of the FPC, and improving the stability and production efficiency of the processing production line.

[0042] Refer to the appendix Figure 3 , In the above embodiment, the self-locking mechanism 120 further includes a pulley 122 arranged on the lifting block 1212, which is used to indirectly lift the lifting block 1212 through the pulley 122. In the embodiment, when the lifting block 1212 is lifted, it can be realized indirectly through the pulley 122, reducing the friction directly acting on the lifting block 1212, making the lifting action smoother and more stable, and further enhancing the reliability and durability of the self-locking mechanism 120.

[0043] See attached Figure 3 In the above embodiment, the self-locking mechanism 120 further includes a self-locking seat 123, which is fixedly mounted on the carrier 110, and the self-locking member 121 is rotatably mounted on the self-locking seat 123. In the embodiment, the self-locking seat 123 is used to mount the self-locking member 121 and the pulley 122, so that they become an integral part of the self-locking mechanism 120, which facilitates the installation of the self-locking mechanism 120 on the carrier 110 through the self-locking seat 123, and facilitates the installation, maintenance and debugging of the self-locking mechanism 120.

[0044] See attached Figure 1 In the above embodiment, a mounting groove 112 penetrating the carrier 110 is provided at the edge of the carrier 110, and the self-locking seat 123 is installed at the mounting groove 112. In the embodiment, the self-locking mechanism 120 is installed below the mounting groove 112 corresponding to the mounting groove 112, and the self-locking member 121 passes through the mounting groove 112 from bottom to top and is placed above the carrier 110.

[0045] See attached Figure 1 In the above embodiment, a limiting strip 113 is provided around the edge of the load-bearing area 111, and the FPC placed in the load-bearing area 111 will be limited by the limiting strip 113 and cannot be relatively translated to leave the load-bearing area 111. In the embodiment, the setting of the limiting strip 113 limits the translational freedom of the FPC placed in the load-bearing area 111, and restricts the FPC in the load-bearing area 111, effectively preventing the FPC from leaving the load-bearing area 111 due to external force during the transmission process, and cooperates with the downward limit of the self-locking member 121 to further enhance the stability of the FPC on the self-locking carrier 1.

[0046] See attached Figure 2 In the above embodiment, the bottom edge of the carrier 110 is provided with a conveyor belt slot 114. When the carrier 110 is placed on the conveyor belt 221, the conveyor belt 221 is located in the conveyor belt slot 114. In the embodiment, the conveyor belt slots 114 are provided on both sides of the carrier 110 symmetrically, so as to be placed on the parallel conveyor belts 221, thereby avoiding the risk of FPC displacement caused by shaking of the carrier 110 during movement. Example

[0047] See attached Figure 4 and attached Figure 5, this embodiment provides a lifting mechanism, which includes a self-locking carrier 1 for transporting FPCs in Embodiment 1, and further includes: a lifting track 210; a lifting platform 220 installed in the lifting track 210, and the lifting platform 220 can move up and down in the vertical direction along the lifting track 210; a limit bracket 230 arranged below the lifting track 210. When the self-locking carrier 1 moves towards the limit bracket 230 and the lifting block of the self-locking mechanism 120 contacts the limit bracket 230, the pressure plate 1211 rotates upward to unlock; when the self-locking carrier 1 moves away from the limit bracket 230, the pressure plate 1211 rotates downward to lock. In the embodiment, the lifting track 210 is used to realize the displacement of the self-locking carrier 1 in the vertical direction. When the self-locking carrier 1 is located below the lifting track 210, the self-locking member 121 is lifted by the limit bracket 230 and is in the unlocked and open state. At this time, the FPC can be loaded onto the carrier plate 110 of the self-locking carrier 1. When the self-locking carrier 1 moves upward along the lifting track 210, the lifting block 1212 of the self-locking member 121 is in a suspended state because it is separated from the limit bracket 230. Under the action of gravity, the pressure plate 1211 presses down on the FPC, realizing self-locking and fixing during vertical movement. For processing equipment with different heights, the lifting mechanism 2 can realize the automatic transmission and stable fixation of the self-locking carrier 1 between processing equipment at different heights, improving the automation degree and efficiency of the FPC processing process.

[0048] Refer to the appendix Figure 4 and the appendix Figure 5 , in the above embodiment, conveyor belts 221 are arranged on both sides of the lifting platform 220, and the self-locking carrier 1 is placed on the conveyor belts 221. In the embodiment, the conveyor belts 221 on both sides of the lifting platform 220 are two horizontally parallel conveyor belts 221. When the lifting platform 220 transports the self-locking carrier 1 to the required height along the lifting track 210, the conveyor belts 221 can horizontally send the self-locking carrier 1 away from the lifting platform 220, realizing the transfer of the self-locking carrier 1 to the horizontal track at different heights. Embodiment

[0049] Refer to the appendix Figure 5 and the appendix Figure 6 , this embodiment provides a circulating conveying device, which includes a lifting mechanism 2 in Embodiment 2, and further includes: a loading mechanism 3 and an unloading mechanism 4. The loading mechanism 3 and the unloading mechanism 4 both have a lifting mechanism 2; a loading track 5 and a carrier return track 6 connected between the loading mechanism 3 and the unloading mechanism 4. The loading track 5 is connected to the lower ends of the two lifting mechanisms 2, and the carrier return track 6 is connected to the upper ends of the two lifting mechanisms 2. An adsorption mechanism 7 is also arranged in the loading mechanism 3 and the unloading mechanism 4, which is used to adsorb and move the FPC onto or off the self-locking carrier 1.

[0050] Refer to the appendix Figure 5 and the appendixFigure 6 In the above embodiment, the self-locking carrier 1 is located in the feeding mechanism 3 and above the limiting bracket 230, and the self-locking member 121 is in the open state under the lifting of the limiting bracket 230; the adsorption mechanism 7 adsorbs the empty FPC board and places it on the carrier 110 of the self-locking carrier 1; the conveyor belt 221 of the lifting platform 220 sends the self-locking carrier 1 horizontally to the feeding track 5, and at the same time, the self-locking member 121 of the self-locking carrier 1 enters the self-locking fixed state. The self-locking carrier 1 moves along the feeding track 5, passes through the printer 8, the placement machine 9 and other equipment to enter the corresponding processing process, and then continues to enter the unloading mechanism 4 along the feeding track 5. At this time, the self-locking carrier 1 is located on the lifting platform 220 in the unloading mechanism 4 and above the limiting bracket 230, and the self-locking member 121 is unlocked; the adsorption mechanism 7 in the unloading mechanism 4 adsorbs and removes the FPC from the self-locking carrier 1, so that the self-locking carrier 1 is empty. The empty self-locking carrier 1 moves upward along the lifting track 210 in the unloading mechanism 4 until it is flush with the height of the carrier return track 6. The conveyor belt 221 of the lifting platform 220 sends the self-locking carrier 1 out of the lifting platform 220 and enters the carrier return track 6; the self-locking carrier 1 is moved to the top of the loading mechanism 3 along the carrier return track 6, and the self-locking carrier 1 is lowered and reset again with the help of the lifting platform 220 in the loading mechanism 3, realizing the cyclic transmission of the self-locking carrier 1. This embodiment realizes the seamless connection and automatic flow of FPC in the entire processing process, improves the processing efficiency of FPC, reduces manual intervention and error rate, and improves the intelligence level of the entire production line.

[0051] In summary, the present embodiment provides a self-locking carrier, lifting mechanism and circulating conveying device for transporting FPC. By setting the self-locking mechanism 120, the self-locking member 121 can automatically open when the lifting block 1212 is lifted up, and automatically press down to lock the FPC when the lifting block 1212 is suspended in the air, thereby achieving stable fixation of the FPC during transportation; by setting the pulley 122, the friction force directly acting on the lifting block 1212 is reduced, making the lifting action smoother and more stable; by setting the installation groove 112 and the self-locking seat 123, the space of the carrier 110 is saved, which is convenient for the installation, debugging and maintenance of the self-locking member 121; by setting the limit bar 11 3. Effectively prevent the FPC from being separated from the load-bearing area 111 due to external force during the transmission process; by setting the conveyor belt slot 114, the carrier 110 can be more stably matched with the conveyor belt 221 when placed on it; by combining the lifting mechanism 2 and the self-locking carrier 1, the automatic transmission of the FPC at different heights is realized; by setting the loading mechanism 3, the unloading mechanism 4, the loading track 5 and the carrier return track 6, the seamless connection and automatic flow of the FPC in the entire processing flow are realized; this embodiment realizes the stable fixation of the FPC during the transmission process, effectively prevents the displacement and falling off of the FPC, and improves the stability and production efficiency of the processing production line.

[0052] The above-described embodiments are only one of the more preferred specific embodiments of the present utility model. Any ordinary variations and substitutions made by technicians in the field within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-locking carrier for transporting FPC, characterized in that: include: A carrier board (110), wherein a top surface of the carrier board (110) is provided with a bearing area (111) for bearing the FPC; A self-locking mechanism (120) is installed on the carrier (110), the self-locking mechanism (120) comprises a self-locking member (121) rotatably arranged at the edge of the bearing area (111), a pressure plate (1211) and a lifting block (1212) are respectively provided at the upper and lower ends of the self-locking member (121) at a certain angle, the pressure plate (1211) is located above the carrier (110), and the lifting block (1212) is located below the carrier (110); when the lifting block (1212) is lifted up, the pressure plate (1211) rotates upward to open; when the lifting block (1212) is suspended in the air, the pressure plate (1211) rotates downward and presses down the FPC located in the bearing area (111) from the edge of the bearing area (111).

2. A self-locking carrier for transporting FPC according to claim 1, characterized in that: The self-locking mechanism (120) further comprises a pulley (122) disposed on the lifting block (1212) and used for indirectly lifting the lifting block (1212) via the pulley (122).

3. A self-locking carrier for transporting FPC according to claim 2, characterized in that: The self-locking mechanism (120) further comprises a self-locking seat (123), wherein the self-locking seat (123) is fixedly mounted on the carrier plate (110), and the self-locking member (121) is rotatably mounted on the self-locking seat (123).

4. A self-locking carrier for transporting FPC according to claim 3, characterized in that: An installation groove (112) penetrating the carrier plate (110) is provided at the edge of the carrier plate (110), and the self-locking seat (123) is installed at the installation groove (112).

5. A self-locking carrier for transporting FPC according to any one of claims 1 to 4, characterized in that: A limiting strip (113) is provided around the edge of the carrying area (111); an FPC placed in the carrying area (111) will be restricted by the limiting strip (113) and cannot move relatively horizontally to leave the carrying area (111).

6. A self-locking carrier for transporting FPC according to any one of claims 1 to 4, characterized in that: A conveyor belt slot (114) is provided at the bottom edge of the carrier plate (110); when the carrier plate (110) is placed on the conveyor belt (221), the conveyor belt (221) is located in the conveyor belt slot (114).

7. A lifting mechanism, characterized in that: A self-locking carrier (1) for transporting FPC according to any one of claims 1 to 6, further comprising: Lifting track (210); A lifting platform (220) installed in the lifting track (210), the lifting platform (220) being able to move up and down in a vertical direction along the lifting track (210); A limit bracket (230) is arranged below the lifting track (210), and when the self-locking carrier (1) moves in a direction close to the limit bracket (230) until the lifting block of the self-locking mechanism (120) contacts the limit bracket (230), the pressure plate (1211) rotates upward to open and unlock; when the self-locking carrier (1) moves away from the limit bracket (230), the pressure plate (1211) rotates downward to lock.

8. A lifting mechanism according to claim 7, characterized in that: Conveyor belts (221) are provided on both sides of the lifting platform (220), and the self-locking carrier (1) is placed on the conveyor belts (221).

9. A circulating conveying device, characterized in that: The lifting mechanism (2) according to claim 7 further comprises: A loading mechanism (3) and a unloading mechanism (4), wherein the loading mechanism (3) and the unloading mechanism (4) are both provided with the lifting mechanism (2); A loading track (5) and a carrier return track (6) are connected between the loading mechanism (3) and the unloading mechanism (4); the loading track (5) is connected to the lower ends of the two lifting mechanisms (2), and the carrier return track (6) is connected to the upper ends of the two lifting mechanisms (2).

10. A circulating conveying device according to claim 9, characterized in that: The loading mechanism (3) and the unloading mechanism (4) are also provided with an adsorption mechanism (7) for adsorbing and moving the FPC onto the self-locking carrier (1) or removing the FPC from the self-locking carrier (1).