Flat workpiece conveying line

Abstract

The utility model provides a flat workpiece conveyor line, which comprises a workpiece conveying device, a first conveying track and a first conveying mechanism, the workpiece conveying device comprises an objective table and a connecting plate, the bottom of the connecting plate is provided with a first connecting air hole, the upper surface of the objective table is provided with an object adsorption hole, the object adsorption hole is communicated with the first connecting air hole, and the first connecting air hole is communicated with the first conveying track. The first conveying track is used for bearing the connecting plate, a plurality of conveying adsorption holes are formed in the upper surface of the first conveying track and can communicate with the first connecting air hole, the multiple conveying adsorption holes can communicate with an external air source, and the first conveying mechanism is used for bearing the objective table. According to the flat plate workpiece conveying line, the objective table always has adsorption force to adsorb the flat plate workpieces in the whole conveying process, so that a good fixing effect can be achieved, the flat plate workpieces are prevented from deviating, and the flat plate workpieces can pass through all working procedures in a unified placing posture.

Description

Technical Field

[0001] The utility model relates to the technical field of flat workpiece conveying, in particular to a flat workpiece conveying line. Background Art

[0002] For some flat workpieces, such as mobile phone backplates, laptop backplates, tablet computer backplates, power bank backplates, watch backplates and other flat workpieces, after production, they need to be conveyed to other processes, such as assembly processes, inspection processes, etc. In the existing conveying lines, conveyor belts are generally used for conveying. However, in such a conveying method, the placement positions and postures of the flat workpieces on the conveyor belt are not unified, and they cannot be placed in an orderly manner. Moreover, during the conveying process, the workpieces will also shift due to some bumps. Especially in the inspection process, if the flat workpieces shift during the conveying process, it will result in inconsistent postures of the flat workpieces detected by each inspection device, thereby causing deviations in the inspection results, low accuracy of the inspection results, and low inspection efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a flat workpiece conveying line that can fix the position of the flat workpiece during the conveying process, avoid the flat workpiece from shifting, and enable the flat workpiece to pass through each process with a unified placement posture.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] Provide a flat workpiece conveying line, including:

[0006] A workpiece transportation device, the workpiece transportation device includes a carrier table and a connection plate, a first connection air hole is provided at the bottom of the connection plate, a carrier adsorption hole is provided on the upper surface of the carrier table, and the carrier adsorption hole is communicated with the first connection air hole;

[0007] A first conveying track for supporting the connection plate, a plurality of conveying adsorption holes are provided on the upper surface of the first conveying track, all of the plurality of conveying adsorption holes can be communicated with the first connection air hole, and all of the plurality of conveying adsorption holes can be communicated with an external air source;

[0008] A first conveying mechanism for supporting the carrier table.

[0009] Through the above solution, during the transportation of the stage by the first conveying mechanism, the air at the stage can sequentially pass through the stage adsorption holes, the first connection air holes, and the conveying adsorption holes and then enter the external air source, thereby adsorbing the air at the stage, that is, the flat workpiece can be adsorbed and fixed on the stage, so that the flat workpiece can be fixed. It can be understood that the stage always has an adsorption force to adsorb the flat workpiece during the entire transportation process, so as to achieve a good fixing effect, avoid the flat workpiece from shifting, and enable the flat workpiece to pass through each process in a unified placement posture.

[0010] Optionally, the workpiece transportation device further includes a connection air pipe. A second connection air hole is provided on the side surface of the connection plate, and a connection air passage is provided inside the connection plate. The connection air passage is used to connect the first connection air hole and the second connection air hole. A stage air hole is provided on the side surface of the stage, and a stage air passage is provided inside the stage. The stage air passage is used to connect the stage adsorption hole and the stage air hole. The stage air hole is connected to the second connection air hole through the connection air pipe.

[0011] Optionally, the flat workpiece conveying line further includes a second conveying track, a second conveying mechanism, a first rail-changing mechanism, a second rail-changing mechanism, and a workbench. The first conveying mechanism, the first rail-changing mechanism, the second conveying mechanism, and the second rail-changing mechanism are sequentially connected end to end and arranged on the workbench and can all convey the stage. The second conveying track is used to support the connection plate. A plurality of the conveying adsorption holes are provided on the upper surface of the second conveying track. Conveying air passages are provided inside both the first conveying track and the second conveying track. The conveying air passages are connected to an external air source, and a plurality of the conveying adsorption holes are all connected to the conveying air passages.

[0012] Optionally, the first conveying mechanism includes a first conveying seat, a first conveyor belt, a first conveying drive unit, and a first conveying slide rail. The first conveying seat is arranged on the workbench. The first conveying slide rail and the first conveyor belt are both arranged on the first conveying seat. The first conveying drive unit is connected to the first conveyor belt.

[0013] Optionally, the second conveying mechanism includes a second conveying seat, a second conveyor belt, a second conveying drive unit, and a second conveying slide rail. The second conveying seat is arranged on the workbench. The second conveying slide rail and the second conveyor belt are both arranged on the second conveying seat. The second conveying drive unit is connected to the second conveyor belt.

[0014] Optionally, the bottom of the stage is provided with stage pulleys and a stage conveying part. The stage pulleys are slidably connected to the first conveying slide rail and the second conveying slide rail. The first conveyor belt and the second conveyor belt are both toothed conveyor belts. The stage conveying part is provided with stage conveying teeth, and the stage conveying teeth can be connected to the first conveyor belt and the second conveyor belt.

[0015] Optionally, the first conveying track is arranged on one side of the first conveying seat away from the second conveying seat, and the second conveying track is arranged on one side of the second conveying seat close to the first conveying seat; the first rail-changing mechanism includes a first rail-changing seat, a first rail-changing driving unit, a first rail-changing plate and a first rail-changing slide rail. The first rail-changing seat is arranged on the workbench and is located at the conveying end of the first conveyor belt and the conveying start end of the second conveyor belt. The first rail-changing driving unit is arranged on the first rail-changing seat. The first rail-changing driving unit is connected to the first rail-changing plate. The first rail-changing slide rail is arranged on the first rail-changing plate, and the stage pulleys can be slidably connected to the first rail-changing slide rail.

[0016] Optionally, the second rail-changing mechanism includes a second rail-changing seat, a second rail-changing driving unit, a second rail-changing plate and a second rail-changing slide rail. The second rail-changing seat is arranged on the workbench and is located at the conveying end of the second conveyor belt and the conveying start end of the first conveyor belt. The second rail-changing driving unit is arranged on the second rail-changing seat. The second rail-changing driving unit is connected to the second rail-changing plate. The second rail-changing slide rail is arranged on the second rail-changing plate, and the stage pulleys can be slidably connected to the second rail-changing slide rail.

[0017] Optionally, the first rail-changing mechanism further includes a first rail-changing detection unit, a first rail-changing blocking post and a first rail-changing blocking cylinder. The first rail-changing detection unit is arranged on the first rail-changing plate. The first rail-changing blocking cylinder is arranged on the first rail-changing plate. The first rail-changing blocking cylinder is connected to the first rail-changing blocking post to drive the first rail-changing blocking post to move in the vertical direction; the second rail-changing mechanism further includes a second rail-changing detection unit, a second rail-changing blocking post and a second rail-changing blocking cylinder. The second rail-changing detection unit is arranged on the second rail-changing plate. The second rail-changing blocking cylinder is arranged on the second rail-changing plate. The second rail-changing blocking cylinder is connected to the second rail-changing blocking post to drive the second rail-changing blocking post to move in the vertical direction.

[0018] Optionally, the upper surface of the stage is provided with a stage positioning block and a plurality of stage limiting blocks. The plurality of stage limiting blocks are arranged around the stage positioning block. The stage positioning block is provided with a plurality of stage adsorption grooves, and the plurality of stage adsorption grooves can communicate with the stage adsorption holes. The stage adsorption holes are located at the bottom surface of the stage adsorption grooves.

[0019] Compared with the prior art, the solution of the present utility model has the following advantages:

[0020] In the flat workpiece conveying line of the present utility model, during the conveying process of the first conveying mechanism of the loading platform, the air at the loading platform can sequentially pass through the loading adsorption holes, the first connection air holes, and the conveying adsorption holes and then enter the external air source, so as to adsorb the air at the loading platform, that is, the flat workpiece can be adsorbed and fixed on the loading platform, so that the flat workpiece can be fixed. It can be understood that the loading platform always has an adsorption force to adsorb the flat workpiece during the whole conveying process, so as to achieve a good fixing effect, avoid the flat workpiece from shifting, and enable the flat workpiece to pass through each process in a unified placement posture.

[0021] Additional aspects and advantages of the present utility model will be given in part in the following description, and these will become obvious from the following description, or can be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above-mentioned and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the following description of the embodiments in conjunction with the drawings, where:

[0023] Figure 1 is a schematic structural diagram of a flat workpiece conveying line in an embodiment of the present utility model;

[0024] Figure 2 is a schematic structural diagram of the flat workpiece conveying line in another angle in an embodiment of the present utility model;

[0025] Figure 3 is a schematic structural diagram of a workpiece transporting device and a first conveying mechanism in an embodiment of the present utility model;

[0026] Figure 4 is a side view of a workpiece transporting device and a first conveying mechanism in an embodiment of the present utility model;

[0027] Figure 5 is a schematic structural diagram of a workpiece transporting device in an embodiment of the present utility model;

[0028] Figure 6 is a schematic structural diagram of a first rail-changing mechanism in an embodiment of the present utility model.

[0029] Reference signs: 1, workbench; 2, workpiece conveying device; 21, carrier table; 211, carrier adsorption holes; 212, carrier air holes; 22, connecting plate; 221, first connecting air holes; 222, second connecting air holes; 223, connecting groove; 23, carrier pulley; 24, carrier conveying part; 25, carrier conveying teeth; 26, carrier positioning block; 27, carrier limiting block; 28, carrier adsorption groove; 3, first conveying track; 4, second conveying track; 5, first conveying mechanism; 51, first conveying seat; 52, first conveyor belt; 53, first conveying drive unit; 54, first conveying slide rail; 6, second conveying mechanism; 61, second conveying seat; 62, second conveyor belt; 63, second conveying drive unit; 64, second conveying slide rail; 7, first rail-changing mechanism; 71, first rail-changing seat; 72, first rail-changing drive unit; 73, first rail-changing plate; 74, first rail-changing slide rail; 75, first rail-changing detection unit; 76, first rail-changing blocking post; 77, first rail-changing blocking cylinder; 8, second rail-changing mechanism; 9, conveying adsorption holes; 10, flat workpiece. Detailed implementation manners

[0030] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which 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 the present utility model and should not be construed as a limitation to the present utility model.

[0031] As Figures 1 to 6 shown, the present utility model provides a flat workpiece conveying line, which is mainly used for conveying the flat workpiece 10, such as conveying the back plate of a mobile phone, so that the flat workpiece 10 can enter each process.

[0032] The flat workpiece conveying line provided in this embodiment includes a workpiece conveying device 2, a first conveying track 3 and a first conveying mechanism 5. The workpiece conveying device 2 includes a carrier table 21 and a connecting plate 22. The bottom of the connecting plate 22 is provided with first connecting air holes 221. The upper surface of the carrier table 21 is provided with carrier adsorption holes 211. The carrier adsorption holes 211 communicate with the first connecting air holes 221. The first conveying track 3 is used to support the connecting plate 22. The upper surface of the first conveying track 3 is provided with a plurality of conveying adsorption holes 9. All the plurality of conveying adsorption holes 9 can communicate with the first connecting air holes 221. All the plurality of conveying adsorption holes 9 can communicate with an external air source. The first conveying mechanism 5 is used to support the carrier table 21.

[0033] For the convenience of explanation, in this embodiment, each direction is as Figure 1 shown, and the first conveying mechanism 5 conveys the flat workpiece 10 from left to right.

[0034] In this embodiment, during the transportation of the carrier table 21 by the first conveying mechanism 5, the air at the carrier table 21 can sequentially pass through the carrier adsorption holes 211, the first connection air holes 221, and the conveying adsorption holes 9 and then enter the external air source, so as to adsorb the air at the carrier table 21, that is, the flat workpiece 10 can be adsorbed and fixed on the carrier table 21, thereby being able to fix the flat workpiece 10. It can be understood that the carrier table 21 always has an adsorption force to adsorb the flat workpiece 10 during the entire transportation process, so as to achieve a good fixing effect, avoid the flat workpiece 10 from shifting, and enable the flat workpiece 10 to pass through each process with a unified placement posture.

[0035] In some embodiments, the workpiece transportation device 2 further includes a connection air pipe, which is not shown in the attached drawings. For example, Figures 3 to 5 As shown, the side surface of the connection plate 22 is provided with second connection air holes 222, and the inside of the connection plate 22 is provided with a connection air passage for communicating the first connection air holes 221 and the second connection air holes 222. The side surface of the carrier table 21 is provided with carrier air holes 212, and the inside of the carrier table 21 is provided with a carrier air passage for communicating the carrier adsorption holes 211 and the carrier air holes 212. The carrier air holes 212 are communicated with the second connection air holes 222 through a connection air pipe.

[0036] Specifically, during the transportation of the carrier table 21 by the first conveying mechanism 5, the air at the carrier table 21 can sequentially pass through the carrier adsorption holes 211, the carrier air passage, the connection air pipe, the connection air passage, and the conveying air passage and enter the external air source, so as to adsorb the air at the carrier table 21, that is, the flat workpiece 10 can be adsorbed and fixed on the carrier table 21, thereby being able to fix the flat workpiece 10. It can be understood that the carrier table 21 always has an adsorption force to adsorb the flat workpiece 10 during the entire transportation process, so as to achieve a good fixing effect, avoid the flat workpiece 10 from shifting, and enable the flat workpiece 10 to pass through each process with a unified placement posture.

[0037] In some embodiments, such as Figure 1 and Figure 2 As shown, the flat workpiece conveying line further includes a second conveying track 4, a second conveying mechanism 6, a first rail-changing mechanism 7, a second rail-changing mechanism 8, and a workbench 1. The first conveying mechanism 5, the first rail-changing mechanism 7, the second conveying mechanism 6, and the second rail-changing mechanism 8 are sequentially connected end to end and arranged on the workbench 1 and can all convey the carrier table 21. The second conveying track 4 is used to support the connection plate 22. The upper surface of the second conveying track 4 is provided with a plurality of conveying adsorption holes 9. The inside of both the first conveying track 3 and the second conveying track 4 is provided with a conveying air passage, and the conveying air passage is communicated with the external air source. The plurality of conveying adsorption holes 9 are all communicated with the conveying air passage.

[0038] Specifically, the first conveying mechanism 5, the first rail-changing mechanism 7, the second conveying mechanism 6, and the second rail-changing mechanism 8 are connected end to end in sequence to form a circular conveying line. A plurality of workpiece conveying devices 2 are provided on the circular conveying line, capable of simultaneously conveying a plurality of flat workpieces 10, so that the flat workpieces 10 can be conveyed in large quantities, and the conveying efficiency is higher.

[0039] In some embodiments, as Figure 1 and Figure 2 shown, the first conveying mechanism 5 includes a first conveying base 51, a first conveyor belt 52, a first conveying drive unit 53, and a first conveying slide rail 54. The first conveying base 51 is provided on the workbench 1, the first conveying slide rail 54 and the first conveyor belt 52 are both provided on the first conveying base 51, and the first conveying drive unit 53 is connected to the first conveyor belt 52, capable of conveying the flat workpiece 10 more smoothly.

[0040] In some embodiments, as Figure 1 and Figure 2 shown, the second conveying mechanism 6 includes a second conveying base 61, a second conveyor belt 62, a second conveying drive unit 63, and a second conveying slide rail 64. The second conveying base 61 is provided on the workbench 1, the second conveying slide rail 64 and the second conveyor belt 62 are both provided on the second conveying base 61, and the second conveying drive unit 63 is connected to the second conveyor belt 62, capable of conveying the flat workpiece 10 more smoothly.

[0041] In some embodiments, both the first conveying drive unit 53 and the second conveying drive unit 63 are motors, which respectively drive the first conveyor belt 52 and the second conveyor belt 62 to rotate through transmission gears.

[0042] In some embodiments, as Figure 4 and Figure 5 shown, the bottom of the carrier table 21 is provided with carrier pulleys 23 and a carrier conveying part 24. The carrier pulleys 23 can be slidably connected to the first conveying slide rail 54 and the second conveying slide rail 64. Both the first conveyor belt 52 and the second conveyor belt 62 are toothed conveyor belts. The carrier conveying part 24 is provided with carrier conveying teeth 25, and the carrier conveying teeth 25 can be connected to the first conveyor belt 52 and the second conveyor belt 62.

[0043] Specifically, through the cooperation of the toothed conveyor belt and the carrier conveying teeth 25 for conveying, the conveying is more stable and the stability is higher. The first conveying slide rail 54 and the second conveying slide rail 64 can play a certain role in supporting the carrier table 21, and by setting the carrier pulleys 23 to cooperate with the two conveying slide rails, the smoothness and smoothness of the movement of the carrier table 21 can be improved.

[0044] In some embodiments, as Figure 5As shown, a connection groove 223 is provided at the bottom of the connection plate 22. The connection groove 223 is communicated with the first connection air hole 221. The connection groove 223 can be communicated with the conveying adsorption hole 9, which can better connect the first connection air hole 221 and the conveying adsorption hole 9, ensuring that no matter where the connection plate 22 moves, it can be communicated with the conveying adsorption hole 9.

[0045] In some embodiments, the first conveying track 3 is provided on the side of the first conveying seat 51 away from the second conveying seat 61, and the second conveying track 4 is provided on the side of the second conveying seat 61 close to the first conveying seat 51; as Figure 6 As shown, the first rail-changing mechanism 7 includes a first rail-changing seat 71, a first rail-changing driving unit 72, a first rail-changing plate 73 and a first rail-changing slide rail 74. The first rail-changing seat 71 is provided on the workbench 1 and is located at the conveying end of the first conveyor belt 52 and the conveying start end of the second conveyor belt 62. The first rail-changing driving unit 72 is provided on the first rail-changing seat 71. The first rail-changing driving unit 72 is connected to the first rail-changing plate 73. The first rail-changing slide rail 74 is provided on the first rail-changing plate 73. The load-carrying pulley 23 can be slidably connected to the first rail-changing slide rail 74.

[0046] Specifically, when the load-carrying platform 21 is conveyed to the first rail-changing mechanism 7, the first conveyor belt 52 conveys the load-carrying platform 21 from the first conveying slide rail 54 to the first rail-changing slide rail 74 to complete the transition. The first rail-changing driving unit 72 drives the first rail-changing plate 73 to drive the flat workpiece 10 to the conveying start end of the second conveyor belt 62 and makes the load-carrying conveying teeth 25 of the load-carrying platform 21 connected to the surface of the second conveyor belt 62, thereby completing the rail-changing process and realizing circular conveying, with higher conveying efficiency.

[0047] In some embodiments, the second rail-changing mechanism 8 includes a second rail-changing seat, a second rail-changing driving unit, a second rail-changing plate and a second rail-changing slide rail. The second rail-changing seat is provided on the workbench 1 and is located at the conveying end of the second conveyor belt 62 and the conveying start end of the first conveyor belt 52. The second rail-changing driving unit is provided on the second rail-changing seat. The second rail-changing driving unit is connected to the second rail-changing plate. The second rail-changing slide rail is provided on the second rail-changing plate. The load-carrying pulley 23 can be slidably connected to the second rail-changing slide rail.

[0048] Specifically, after the flat workpiece 10 on the carrier table 21 at the conveying end of the second conveyor belt 62 is carried away, the second conveyor belt 62 conveys the carrier table 21 from the second conveying slide rail 64 to the second rail-changing slide rail. The second rail-changing driving unit drives the second rail-changing plate to drive the carrier table 21 to move to the conveying start end of the first conveyor belt 52 and connect the load-carrying conveying teeth 25 of the carrier table 21 to the surface of the first conveyor belt 52. The first conveyor belt 52 continues to convey the carrier table 21. The second rail-changing driving unit drives the second rail-changing plate to move to the conveying end of the second conveyor belt 62 and then transports the next carrier table 21. In this way, the carrier table 21 is transported in a cyclic manner to form an annular conveying device, so that the flat workpiece 10 can be conveyed in large quantities, and the conveying efficiency is higher.

[0049] In some embodiments, both the first rail-changing driving unit 72 and the second rail-changing driving unit are linear modules.

[0050] In some embodiments, as Figure 6 shown, the first rail-changing mechanism 7 further includes a first rail-changing detection unit 75, a first rail-changing blocking column 76 and a first rail-changing blocking cylinder 77. The first rail-changing detection unit 75 is arranged on the first rail-changing plate 73. The first rail-changing blocking cylinder 77 is arranged on the first rail-changing plate 73. The first rail-changing blocking cylinder 77 is connected to the first rail-changing blocking column 76 to drive the first rail-changing blocking column 76 to move in the vertical direction. The second rail-changing mechanism 8 further includes a second rail-changing detection unit, a second rail-changing blocking column and a second rail-changing blocking cylinder. The second rail-changing detection unit is arranged on the second rail-changing plate. The second rail-changing blocking cylinder is arranged on the second rail-changing plate. The second rail-changing blocking cylinder is connected to the second rail-changing blocking column to drive the second rail-changing blocking column to move in the vertical direction.

[0051] Specifically, both the first rail-changing detection unit 75 and the second rail-changing detection unit are used to detect the position of the carrier table 21. When there is a carrier table 21 on the first rail-changing plate 73, the first rail-changing blocking cylinder 77 drives the first rail-changing blocking column 76 to move upward and block the carrier table 21, so that the carrier table 21 is kept in a fixed position. Similarly, when there is a carrier table 21 on the second rail-changing plate, the second rail-changing blocking cylinder drives the second rail-changing blocking column to move upward and block the carrier table 21, so that the carrier table 21 is kept in a fixed position, and the rail-changing work can be completed more smoothly and accurately.

[0052] In some embodiments, both the first rail-changing detection unit 75 and the second rail-changing detection unit are photoelectric switches.

[0053] In some embodiments, as Figure 3As shown in the figure, the upper surface of the stage 21 is provided with a stage positioning block 26 and a plurality of stage limiting blocks 27. The plurality of stage limiting blocks 27 are arranged around the stage positioning block 26. The stage positioning block 26 is provided with a plurality of stage adsorption grooves 28, and the plurality of stage adsorption grooves 28 can all communicate with the stage adsorption holes 211. The stage adsorption holes 211 are located at the bottom surface of the stage adsorption grooves 28.

[0054] Specifically, the stage positioning block 26 is located in the middle of the stage 21, and the plurality of stage limiting blocks 27 are distributed around the stage positioning block 26, thereby forming a placement area for the flat workpiece 10. By providing the protruding stage positioning block 26, it is possible to better adapt to the flat workpiece 10 such as a mobile phone backplane with grooves, making the distance between the stage adsorption holes 211 and the flat workpiece 10 closer, with a better adsorption effect and a better fixing effect.

[0055] The above are only some embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A flat workpiece conveying line, characterized in that, Comprising: A workpiece transportation device (2), the workpiece transportation device (2) includes a carrier table (21) and a connecting plate (22), a first connecting air hole (221) is provided at the bottom of the connecting plate (22), a carrier adsorption hole (211) is provided on the upper surface of the carrier table (21), and the carrier adsorption hole (211) is communicated with the first connecting air hole (221); A first conveying track (3), the first conveying track (3) is used to support the connecting plate (22), a plurality of conveying adsorption holes (9) are provided on the upper surface of the first conveying track (3), and all of the plurality of conveying adsorption holes (9) can be communicated with the first connecting air hole (221), and all of the plurality of conveying adsorption holes (9) can be communicated with an external air source; A first conveying mechanism (5), the first conveying mechanism (5) is used to support the carrier table (21).

2. The flat workpiece conveying line according to claim 1, characterized in that, The workpiece transportation device (2) further includes a connecting air pipe, a second connecting air hole (222) is provided on the side surface of the connecting plate (22), a connecting air passage is provided inside the connecting plate (22), the connecting air passage is used to connect the first connecting air hole (221) and the second connecting air hole (222), a carrier air hole (212) is provided on the side surface of the carrier table (21), a carrier air passage is provided inside the carrier table (21), the carrier air passage is used to connect the carrier adsorption hole (211) and the carrier air hole (212), and the carrier air hole (212) is communicated with the second connecting air hole (222) through the connecting air pipe.

3. The flat workpiece conveying line according to claim 1, wherein, The flat workpiece conveying line further includes a second conveying track (4), a second conveying mechanism (6), a first rail-changing mechanism (7), a second rail-changing mechanism (8) and a workbench (1), the first conveying mechanism (5), the first rail-changing mechanism (7), the second conveying mechanism (6) and the second rail-changing mechanism (8) are sequentially arranged at the workbench (1) end to end and can all convey the carrier table (21), the second conveying track (4) is used to support the connecting plate (22), a plurality of the conveying adsorption holes (9) are provided on the upper surface of the second conveying track (4), conveying air passages are provided inside the first conveying track (3) and the second conveying track (4), the conveying air passages are communicated with an external air source, and all of the plurality of conveying adsorption holes (9) are communicated with the conveying air passages.

4. The flat workpiece conveying line according to claim 3, wherein, The first conveying mechanism (5) includes a first conveying seat (51), a first conveyor belt (52), a first conveying driving unit (53), and a first conveying slide rail (54), the first conveying seat (51) is arranged on the workbench (1), the first conveying slide rail (54) and the first conveyor belt (52) are both arranged on the first conveying seat (51), and the first conveying driving unit (53) is connected to the first conveyor belt (52).

5. The flat workpiece conveying line according to claim 4, characterized in that, The second conveying mechanism (6) includes a second conveying base (61), a second conveyor belt (62), a second conveying drive unit (63), and a second conveying slide rail (64). The second conveying base (61) is provided on the workbench (1). The second conveying slide rail (64) and the second conveyor belt (62) are both provided on the second conveying base (61). The second conveying drive unit (63) is connected to the second conveyor belt (62).

6. The flat workpiece conveying line according to claim 5, wherein The bottom of the loading platform (21) is provided with loading pulleys (23) and a loading conveying part (24). The loading pulleys (23) can be slidably connected to the first conveying slide rail (54) and the second conveying slide rail (64). Both the first conveyor belt (52) and the second conveyor belt (62) are toothed conveyor belts. The loading conveying part (24) is provided with loading conveying teeth (25), and the loading conveying teeth (25) can be connected to the first conveyor belt (52) and the second conveyor belt (62).

7. The flat workpiece conveying line according to claim 6, characterized in that, The first conveying track (3) is provided on one side of the first conveying base (51) away from the second conveying base (61), and the second conveying track (4) is provided on one side of the second conveying base (61) close to the first conveying base (51). The first rail-changing mechanism (7) includes a first rail-changing base (71), a first rail-changing drive unit (72), a first rail-changing plate (73), and a first rail-changing slide rail (74). The first rail-changing base (71) is provided on the workbench (1) and is located at the conveying end of the first conveyor belt (52) and the conveying start end of the second conveyor belt (62). The first rail-changing drive unit (72) is provided on the first rail-changing base (71). The first rail-changing drive unit (72) is connected to the first rail-changing plate (73). The first rail-changing slide rail (74) is provided on the first rail-changing plate (73). The loading pulleys (23) can be slidably connected to the first rail-changing slide rail (74).

8. The flat workpiece conveying line according to claim 7, wherein, The second rail-changing mechanism (8) includes a second rail-changing base, a second rail-changing drive unit, a second rail-changing plate, and a second rail-changing slide rail. The second rail-changing base is provided on the workbench (1) and is located at the conveying end of the second conveyor belt (62) and the conveying start end of the first conveyor belt (52). The second rail-changing drive unit is provided on the second rail-changing base. The second rail-changing drive unit is connected to the second rail-changing plate. The second rail-changing slide rail is provided on the second rail-changing plate. The loading pulleys (23) can be slidably connected to the second rail-changing slide rail.

9. The flat workpiece conveying line according to claim 8, characterized in that, The first rail-changing mechanism (7) further includes a first rail-changing detection unit (75), a first rail-changing blocking column (76) and a first rail-changing blocking cylinder (77). The first rail-changing detection unit (75) is arranged on the first rail-changing plate (73), and the first rail-changing blocking cylinder (77) is arranged on the first rail-changing plate (73). The first rail-changing blocking cylinder (77) is connected to the first rail-changing blocking column (76) to drive the first rail-changing blocking column (76) to move in the vertical direction. The second rail-changing mechanism (8) further includes a second rail-changing detection unit, a second rail-changing blocking column and a second rail-changing blocking cylinder. The second rail-changing detection unit is arranged on the second rail-changing plate, the second rail-changing blocking cylinder is arranged on the second rail-changing plate, and the second rail-changing blocking cylinder is connected to the second rail-changing blocking column to drive the second rail-changing blocking column to move in the vertical direction.

10. The flat workpiece conveying line according to claim 1, wherein, The upper surface of the carrier table (21) is provided with a carrier positioning block (26) and a plurality of carrier limiting blocks (27). The plurality of carrier limiting blocks (27) are arranged around the carrier positioning block (26). The carrier positioning block (26) is provided with a plurality of carrier adsorption grooves (28). The plurality of carrier adsorption grooves (28) can all communicate with the carrier adsorption holes (211), and the carrier adsorption holes (211) are located at the bottom surface of the carrier adsorption grooves (28).

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