Turnaround tool and flexible circuit board production line

Abstract

This utility model discloses a turnover tool and a flexible circuit board production line, belonging to the field of material handling technology. The turnover tool includes at least two pallets. The inner peripheral wall of the surrounding plate and the upper end face of the base plate jointly define a receiving space. Limiting ribs connected to the surrounding plate are provided within the receiving space, forming at least two receiving slots, each capable of holding at least one workpiece. At least two positioning slots are provided on the upper end face of the limiting ribs and / or the upper end face of the surrounding plate. At least two positioning parts matching the positioning slots are provided on the lower end face of the base plate. In two vertically adjacent pallets, the one on top is the first pallet, and the one on the bottom is the second pallet. The positioning parts of the first pallet are correspondingly inserted into the positioning slots of the second pallet to restrict the relative lateral movement between the first and second pallets. This utility model ensures the overall stability of the pallet stack and does not obstruct the separation of individual pallets.

Description

Technical Field

[0001] This utility model relates to the field of material transportation technology, and in particular to a turnover tool and a flexible circuit board production line. Background Technology

[0002] In related technologies, turnover tools have been widely used in material handling, storage, and turnover processes between various processes. Their core function is to improve production efficiency and reduce handling intensity. However, in practical applications, traditional turnover tools are prone to relative displacement when performing stacking operations, causing the entire stacking structure to tilt or even collapse, thereby damaging the materials placed within it. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a turnover tool that can effectively prevent lateral displacement between pallets during stacking, thereby improving the stability of pallet stacking.

[0004] This utility model also proposes a flexible circuit board production line that includes the aforementioned turnover tools.

[0005] A turnover tool according to a first aspect of the present invention includes: at least two trays, the at least two trays being arranged sequentially in a vertical direction, each tray including a base plate and a side plate, the side plate extending upward along the periphery of the base plate, the inner peripheral wall of the side plate and the upper end face of the base plate jointly defining a receiving space, the receiving space being provided with a limiting rib connected to the side plate, the limiting rib being configured to form at least two receiving grooves with the side plate, each receiving groove being configured to hold at least one workpiece; wherein, the upper end face of the limiting rib and / or the upper end face of the side plate is provided with at least two positioning grooves, the bottom wall of the positioning groove is higher than the bottom wall of the receiving groove, the lower end face of the base plate is provided with at least two positioning parts matching the positioning grooves, in two adjacent trays in the vertical direction, the one located on the upper side is the first tray, and the one located on the lower side is the second tray, the positioning part of the first tray is correspondingly inserted into the positioning groove of the second tray to restrict the relative movement between the first tray and the second tray in the lateral direction.

[0006] The turnover tool according to the embodiments of this utility model has at least the following beneficial effects:

[0007] The turnover tool of this utility model provides at least two positioning grooves on the upper end face of the limiting rib and / or the upper end face of the surrounding plate, and provides at least two positioning parts that match the positioning grooves on the lower end face of the base plate. This allows the positioning parts of the first pallet to be precisely inserted into the positioning grooves of the second pallet when the first pallet is stacked on top of the second pallet below. This restricts the relative movement between the first and second pallets in the lateral direction, achieving precise alignment when two adjacent pallets are stacked. This not only ensures the overall stability of the pallet stack, but also does not cause obstruction when it is necessary to separate the individual pallets. It reduces the risk of damage to the workpieces due to pallet displacement or instability during transportation and storage, ensuring the integrity and safety of the workpieces.

[0008] According to some embodiments of the present invention, the limiting rib includes a first rib extending along the length direction of the pallet and at least two second ribs extending along the width direction of the pallet. The first rib is spaced apart from two side walls of the surrounding plate along the width direction of the pallet. The two ends of the first rib are respectively connected to the two side walls of the surrounding plate along the length direction of the pallet. At least two second ribs are spaced apart along the length direction of the pallet and are respectively connected to the first rib and the side walls of the surrounding plate along the width direction of the pallet.

[0009] According to some embodiments of the present invention, the second rib is provided with at least two positioning grooves, and the at least two positioning grooves are spaced apart on the second rib along the width direction of the tray. Along the width direction of the tray, the opening directions of two adjacent positioning grooves are opposite.

[0010] According to some embodiments of the present invention, the side panel facing the receiving groove is provided with a first handle groove with an upward opening, the first handle groove extends vertically and communicates with the receiving groove, and the bottom wall of the first handle groove is lower than the bottom wall of the receiving groove.

[0011] According to some embodiments of the present invention, the second rib is provided with a through hole extending through the second rib along the length direction of the tray, and the bottom plate is provided with a second handle groove extending in the vertical direction. The second handle groove is located below the through hole and communicates with the receiving groove and the through hole respectively. The through hole can expose the second handle groove, and the bottom wall of the second handle groove is lower than the bottom wall of the receiving groove.

[0012] According to some embodiments of the present invention, the turnover tool further includes a buffer pad, which is disposed on the bottom wall of the receiving groove to separate the bottom wall of the receiving groove from the workpiece.

[0013] According to some embodiments of the present invention, the receiving groove is a square groove, and the corners of the square groove are provided with outwardly extending clearance grooves.

[0014] According to some embodiments of this utility model, the depth of the receiving groove is H, which satisfies: 0.8cm≤H≤1.3cm.

[0015] According to some embodiments of this utility model, the turnover tool is a transparent plastic part.

[0016] The flexible circuit board production line according to a second aspect of the present invention includes the turnover tool described in the first aspect embodiment.

[0017] The flexible circuit board production line according to the embodiments of this utility model has at least the following beneficial effects:

[0018] The flexible circuit board production line of this utility model adopts the turnover tool of the first aspect embodiment. By optimizing the structural design of the turnover tool, precise alignment is achieved when two adjacent pallets are stacked. This not only ensures the overall stability of the pallet stack, but also does not cause obstruction when it is necessary to separate the individual pallets. It reduces the risk of damage to the flexible circuit board due to pallet displacement or instability during transportation and storage, ensures the integrity and safety of the flexible circuit board, and also improves the efficiency and production quality of the flexible circuit board.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram of the structure of a turnover tool according to an embodiment of the present invention;

[0022] Figure 2 This is a partial cross-sectional view of a turnover tool according to an embodiment of the present invention;

[0023] Figure 3 This is a partial cross-sectional view of a turnover tool according to another embodiment of the present invention;

[0024] Figure 4 This is a partial cross-sectional view of a turnover tool according to another embodiment of the present invention.

[0025] Icon labels:

[0026] Pallet 100; base plate 110; second handle groove 111; side panel 120; first handle groove 121; limiting rib 130; first rib 131; second rib 132; through hole 1321; receiving groove 140; positioning groove 150; clearance groove 160. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] Understandably, turnover tools (such as pallets and bins) are widely used in material handling, storage, and the turnover process between various processes, with their core function being to improve production efficiency and reduce handling intensity. However, in practical applications, traditional turnover tools are prone to relative displacement during stacking operations, causing the entire stacking structure to tilt or even collapse, thereby damaging the materials placed within.

[0032] To address the aforementioned problems, some embodiments of this utility model propose a turnover tool suitable for flexible circuit board production lines, as detailed below. Figures 1 to 4 The diagram illustrates the turnover tools.

[0033] Reference Figure 1As shown in this embodiment of the utility model, the turnover tool includes: at least two pallets 100, which are arranged sequentially in a vertical direction. Each pallet 100 includes a base plate 110 and a surrounding plate 120. The surrounding plate 120 extends upward along the periphery of the base plate 110. The inner peripheral wall of the surrounding plate 120 and the upper end face of the base plate 110 together define an accommodating space. A limiting rib 130 connected to the surrounding plate 120 is provided in the accommodating space. The limiting rib 130 is configured to form at least two accommodating slots 140 with the surrounding plate 120. Each accommodating slot 140 is configured to accommodate at least one... The workpiece; wherein, the upper end face of the limiting rib 130 and / or the upper end face of the surrounding plate 120 are provided with at least two positioning grooves 150, the bottom wall of the positioning groove 150 is higher than the bottom wall of the receiving groove 140, the lower end face of the base plate 110 is provided with at least two positioning parts that match the positioning grooves 150, and in two adjacent trays 100 in the vertical direction, the one located on the upper side is the first tray 100, and the one located on the lower side is the second tray 100. The positioning part of the first tray 100 is correspondingly inserted into the positioning groove 150 of the second tray 100 to restrict the relative movement between the first tray 100 and the second tray 100 in the lateral direction.

[0034] Understandably, referring to Figure 2 As shown, in this embodiment of the invention, the bottom wall of the positioning groove 150 is higher than the bottom wall of the receiving groove 140, ensuring that the positioning part will not contact the workpiece inside the receiving groove 140 when inserted. The geometric fit between the positioning part and the positioning groove 150 forms a lateral limit, which can be achieved by using a trapezoidal cross-section or other structures to realize mechanical interlocking. In this embodiment, the positioning part is constructed as a protrusion extending downwards from the lower side of the base plate 110. In this embodiment, the limiting rib 130 serves as both a partition structure of the receiving groove 140 and a load-bearing body of the positioning groove 150, achieving functional integration. The inner peripheral wall of the surrounding plate 120 and the base plate 110 together define the workpiece receiving area, ensuring the loading stability of the single-layer pallet 100.

[0035] Specifically, when two pallets 100 are stacked vertically, the positioning part at the bottom of the upper pallet 100 precisely engages with the positioning groove 150 at the top of the lower pallet 100. This embedded fit creates multiple contact points on the horizontal plane, effectively resisting lateral shear forces. The positioning grooves 150 are arranged in different directions, such as staggered distribution in the length and width directions of the pallets 100, forming multi-dimensional constraints. The limiting ribs 130, as rigid support structures, evenly transfer the stacking load to the lower pallet 100, avoiding localized stress concentration.

[0036] Compared with existing technologies, traditional turnover tools rely on the weight of the pallet itself or surface friction to maintain stacking stability, which cannot effectively prevent horizontal displacement. The turnover tool of this utility model provides at least two positioning grooves 150 on the upper end face of the limiting rib 130 and / or the upper end face of the surrounding plate 120, and provides at least two positioning parts matching the positioning grooves 150 on the lower end face of the base plate 110. This allows the positioning parts of the first pallet 100 to be precisely inserted into the positioning grooves 150 of the second pallet 100 when the first pallet 100 is stacked on top of the second pallet 100. This restricts the relative movement between the first pallet 100 and the second pallet 100 in the lateral direction, achieving precise alignment when two adjacent pallets 100 are stacked. This not only ensures the overall stability of the pallet stack, but also does not cause obstruction when it is necessary to separate the individual pallets 100. It reduces the risk of damage to the workpiece due to pallet displacement or instability during transportation and storage, ensuring the integrity and safety of the workpiece. Therefore, this utility model embodiment is applicable to the large-volume, multi-layer turnover transportation scenario of flexible circuit boards.

[0037] Reference Figure 1 As shown, in this embodiment of the present invention, the limiting rib 130 includes a first rib 131 extending along the length direction of the pallet 100 and at least two second ribs 132 extending along the width direction of the pallet 100. The first rib 131 is spaced apart from the two side walls of the surrounding plate 120 along the width direction of the pallet 100. The two ends of the first rib 131 are respectively connected to the two side walls of the surrounding plate 120 along the length direction of the pallet 100. The at least two second ribs 132 are spaced apart along the length direction of the pallet 100 and are respectively connected to the first rib 131 and the side walls of the surrounding plate 120 along the width direction of the pallet 100.

[0038] In this design, the first rib 131 refers to a reinforcing structure extending laterally along the pallet 100, and the second rib 132 refers to a dividing member extending longitudinally along the pallet 100, which can be implemented using a continuous straight strip of the same material as the side panel 120. In one example, the base plate 110, the side panel 120, the first rib 131, and the second rib 132 are integrally formed. In this embodiment, the second rib 132 intersects with the first rib 131 to form a grid-like support system.

[0039] Specifically, the first rib 131 extends transversely through the pallet 100 to form the main load-bearing frame, and achieves transverse load transfer by fixing both ends to the short sidewall of the enclosure 120. The second rib 132 is orthogonally connected to the first rib 131 in a longitudinal arrangement, forming multiple transversely separated sections. The spacing between adjacent second ribs 132 can be adjusted according to the workpiece size to form receiving grooves 140 of different specifications. The spacing design between the first rib 131 and the long sidewall of the enclosure 120 ensures transverse support rigidity while avoiding excessive material accumulation. The rigid connection between the second rib 132 and the long sidewall of the enclosure 120 forms a longitudinal limiting fulcrum, suppressing horizontal displacement through multi-point contact during stacking.

[0040] It is understood that the grid support system formed by the combination of orthogonal ribs in this embodiment of the invention ensures structural strength while achieving multi-directional displacement constraints, effectively solving the problem of lateral displacement when stacking turnover tools. The grid structure formed by the orthogonal ribs achieves multi-directional limiting constraints. At the same time, the spatial layout of the receiving slot 140 is optimized, maintaining the independent load-bearing capacity of each slot while adapting to the storage needs of workpieces of different sizes through adjustable spacing settings, significantly improving the stability of workpiece placement and space utilization.

[0041] Continue to refer to Figure 1 As shown in this embodiment of the invention, the second rib 132 is provided with at least two positioning grooves 150. These at least two positioning grooves 150 are spaced apart along the width direction of the tray 100 on the second rib 132. This spaced arrangement allows the positioning portion of the upper tray 100 to form multi-point contact with the multiple positioning grooves 150 during stacking, thus dispersing lateral forces. Along the width direction of the tray 100, the opening directions of two adjacent positioning grooves 150 are opposite.

[0042] In this context, "opposite opening directions" means that the opening ends of adjacent positioning grooves 150 face opposite sides along the length of the tray 100. For example, two adjacent positioning grooves 150 may have one opening to the left and the other to the right. This bidirectional opening design creates complementary constraints between the positioning grooves 150 on the same second rib 132. When the positioning part is inserted, the adjacent positioning grooves 150 with opposite openings can respectively block the lateral displacement trend in both directions.

[0043] Understandably, two sets of positioning grooves 150 with opposite opening directions are machined on the surface of the second rib 132. When the positioning part of the upper tray 100 is inserted into the positioning groove 150 of the lower tray 100, the positioning groove 150 with its opening facing left can restrict the tray 100 from moving to the right, while the positioning groove 150 with its opening facing right restricts it from moving to the left. Since the opening directions of adjacent positioning grooves 150 are opposite, the positioning grooves 150 on the same rib form a bidirectional locking structure. Regardless of the direction of the lateral force, it can be blocked by the sidewall of at least one positioning groove 150.

[0044] Reference Figure 3 As shown in this embodiment of the invention, the side panel 120 facing the receiving groove 140 is provided with an upward-opening first hand-holding groove 121. The first hand-holding groove 121 extends vertically and communicates with the receiving groove 140, and the bottom wall of the first hand-holding groove 121 is lower than the bottom wall of the receiving groove 140. It can be understood that the first hand-holding groove 121 refers to a groove structure provided on the inner side wall of the side panel 120, with an upward opening and communicating with the receiving groove 140. Specifically, it can be achieved by milling or injection molding. The opening direction of this groove is consistent with the stacking direction of the tray 100, facilitating the operator's fingers to reach in and grasp the workpiece in the receiving groove 140.

[0045] It should be noted that the bottom wall of the first hand groove 121 being lower than the bottom wall of the receiving groove 140 means that the bottom of the hand groove extends downward to below the workpiece placement plane. This can be achieved by deepening the depth of the hand groove or raising the bottom wall of the receiving groove 140. This structure provides sufficient operating space for fingers to grip the workpiece.

[0046] Reference Figure 1 and Figure 4 As shown in this embodiment of the present invention, the second rib 132 is provided with a through hole 1321 extending through the second rib 132 along the length direction of the tray 100, and the bottom plate 110 is provided with a second handle groove 111 extending in the vertical direction. The second handle groove 111 is located below the through hole 1321 and is connected to the receiving groove 140 and the through hole 1321 respectively. The through hole 1321 can expose the second handle groove 111, and the bottom wall of the second handle groove 111 is lower than the bottom wall of the receiving groove 140.

[0047] It is understood that in this embodiment of the invention, the through hole 1321 refers to a hole penetrating the length of the second rib 132, which can be rectangular or circular, and its function is to provide a channel for the operator to insert their fingers. The second hand-holding groove 111 refers to a vertical groove located on the base plate 110, which can be U-shaped groove structure, and its function is to form a continuous operating space for easy gripping of workpieces. The connection design between the through hole 1321 and the second hand-holding groove 111 forms a continuous gripping path through vertical penetration, which helps to optimize operational convenience while avoiding a reduction in structural strength.

[0048] Specifically, the through hole 1321 penetrates the second rib 132 and forms a vertically connected channel with the second hand-holding groove 111, allowing the operator to directly access the second hand-holding groove 111 through the through hole 1321. The bottom wall of the second hand-holding groove 111 is lower than the bottom wall of the receiving groove 140, so that when the fingers are inserted, they can avoid the bearing surface of the receiving groove 140. The design of the through hole 1321 exposing the second hand-holding groove 111 allows the operator to intuitively identify the gripping position, while keeping the positioning structure between the trays 100 unaffected.

[0049] In this embodiment of the invention, the turnover tool further includes a buffer pad, which is disposed on the bottom wall of the receiving groove 140 to separate the bottom wall of the receiving groove 140 from the workpiece. The buffer pad is an isolation component with elastic deformation capability, which can be made of paper, silicone, rubber or foam material. It is fixed to the bottom wall of the receiving groove 140 by adhesive or snap-fit ​​method to absorb the impact energy during transportation.

[0050] Specifically, a buffer pad covers the bottom wall surface of the receiving groove 140, forming a flexible contact interface. When a workpiece is placed in the receiving groove 140, its bottom surface contacts the buffer pad rather than directly contacting the rigid bottom wall. During transportation or stacking, external vibrations or pressures are absorbed by the elastic deformation of the buffer pad, preventing workpiece damage caused by rigid collisions. This embodiment of the invention, by adding a buffer pad, utilizes the elastic properties of the material to form a buffer isolation layer while maintaining workpiece positioning accuracy, thus solving the problem of damage caused by rigid contact between the workpiece and the pallet 100.

[0051] Reference Figure 1 As shown in this embodiment of the invention, the receiving groove 140 is a square groove, and outwardly extending clearance grooves 160 are provided at the corners of the square groove. A square groove refers to a groove structure with four right-angled sides that are perpendicular to each other. Specifically, it can be integrally formed on the base plate 110 of the tray 100 using injection molding. Its right-angled side structure can adapt to the shape of workpieces with regular right-angled features. The clearance groove 160 refers to the recessed area formed by extending outward at each corner of the square groove. Specifically, it can be formed by processing a protruding structure on the mold, thus creating a physical clearance area by expanding the space at the corners outward.

[0052] It is understood that this embodiment of the invention effectively prevents localized stress concentration at the contact surfaces of the workpiece edges and corners with the groove, avoiding scratches or indentations on the workpiece surface due to excessive contact pressure. Simultaneously, the displacement compensation space formed by the clearance groove 160 can absorb minor positional deviations generated when the pallets 100 are stacked, ensuring the overall stability of the multi-layer stacking structure and reducing the risk of stack tilting due to vibration.

[0053] Reference Figure 2 As shown, in this embodiment of the present invention, the depth of the receiving groove 140 is H, which satisfies: 0.8cm≤H≤1.3cm. It should be noted that the depth of the receiving groove 140 refers to the vertical height of the groove formed by the bottom plate 110 and the limiting rib 130, which can be achieved by injection molding process, and the depth of the groove can be controlled by the mold size.

[0054] Specifically, when the tank depth H is between 0.8cm and 1.3cm, the contact area between the bottom of the workpiece and the bottom wall of the tank is controlled within a reasonable range. This not only restricts the horizontal displacement of the workpiece through the limiting ribs 130, but also avoids an increase in the overall height of the tray 100 due to excessive depth. In the stacked state, the positioning part of the upper tray 100 and the positioning groove 150 of the lower tray 100 form a height difference fit. This depth range ensures uniform pressure distribution between layers, preventing structural deformation caused by local stress concentration. At the same time, this parameter range takes into account the matching requirements of the draft angle and material shrinkage rate in the injection molding process, ensuring the molding accuracy of the tank sidewall.

[0055] In this embodiment of the utility model, the turnover tool is a transparent plastic part, which makes the turnover tool light-transmitting, so that the operator can directly observe the placement of the workpiece in the receiving groove 140, which is convenient for quick positioning and inspection. Specifically, it can be made of polycarbonate or polyethylene terephthalate.

[0056] An embodiment of this utility model also proposes a flexible circuit board production line, including the turnover tool described in the above embodiment.

[0057] The flexible circuit board production line of this utility model adopts the turnover tool described in the above embodiment. By optimizing the structural design of the turnover tool, precise alignment is achieved when two adjacent pallets 100 are stacked. This not only ensures the overall stability of the pallet stack, but also avoids obstruction when it is necessary to separate the individual pallets 100. This reduces the risk of damage to the flexible circuit board due to pallet displacement or instability during transportation and storage, ensuring the integrity and safety of the flexible circuit board, and also improving the efficiency and production quality of the flexible circuit board.

[0058] Since the flexible circuit board production line adopts all the technical solutions of the turnover tools in the above embodiments, it has at least all the beneficial effects brought about by the technical solutions in the above embodiments, which will not be repeated here.

[0059] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A turnover tool, characterized in that, include: At least two pallets are arranged vertically in sequence. Each pallet includes a base plate and a side plate. The side plate extends upward along the periphery of the base plate. The inner peripheral wall of the side plate and the upper end face of the base plate define an accommodating space. The accommodating space is provided with a limiting rib connected to the side plate. The limiting rib is configured to form at least two accommodating slots with the side plate. Each accommodating slot is configured to hold at least one workpiece. The upper end face of the limiting rib and / or the upper end face of the surrounding plate are provided with at least two positioning grooves. The bottom wall of the positioning groove is higher than the bottom wall of the receiving groove. The lower end face of the base plate is provided with at least two positioning parts that match the positioning grooves. Among the two adjacent trays in the vertical direction, the one located on the upper side is the first tray, and the one located on the lower side is the second tray. The positioning part of the first tray is correspondingly inserted into the positioning groove of the second tray to restrict the relative movement between the first tray and the second tray in the lateral direction.

2. The turnover tool according to claim 1, characterized in that, The limiting rib includes a first rib extending along the length direction of the pallet and at least two second ribs extending along the width direction of the pallet. The first rib is spaced apart from two side walls of the surrounding plate along the width direction of the pallet. The two ends of the first rib are respectively connected to the two side walls of the surrounding plate along the length direction of the pallet. The at least two second ribs are spaced apart along the length direction of the pallet and are respectively connected to the first rib and the side walls of the surrounding plate along the width direction of the pallet.

3. The turnover tool according to claim 2, characterized in that, The second rib is provided with at least two positioning grooves, which are spaced apart along the width direction of the tray. The opening directions of two adjacent positioning grooves are opposite along the width direction of the tray.

4. The turnover tool according to claim 2, characterized in that, The enclosure panel has a first handle groove with an upward opening on the side facing the receiving groove. The first handle groove extends vertically and communicates with the receiving groove. The bottom wall of the first handle groove is lower than the bottom wall of the receiving groove.

5. The turnover tool according to claim 4, characterized in that, The second rib has a through hole extending through the second rib along the length direction of the tray. The bottom plate has a second handle groove extending in the vertical direction. The second handle groove is located below the through hole and communicates with the receiving groove and the through hole respectively. The through hole can expose the second handle groove. The bottom wall of the second handle groove is lower than the bottom wall of the receiving groove.

6. The turnover tool according to claim 1, characterized in that, The turnover tool also includes a buffer pad, which is disposed on the bottom wall of the receiving groove to separate the bottom wall of the receiving groove from the workpiece.

7. The turnover tool according to claim 1, characterized in that, The receiving groove is a square groove, and the corners of the square groove are provided with outwardly extending clearance grooves.

8. The turnover tool according to claim 1, characterized in that, The depth of the receiving groove is H, which satisfies: 0.8cm≤H≤1.3cm.

9. The turnover tool according to claim 1, characterized in that, The turnover tool is a transparent plastic part.

10. A flexible circuit board production line, characterized in that, Includes the turnover tools as described in any one of claims 1 to 9.

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