Sheet centering conveyor line

Abstract

The present invention discloses a sheet material centering conveyor line, which relates to the technical field of transportation equipment. The sheet material centering conveyor line includes: a conveying assembly provided with a conveying plane; a front centering assembly including a front centering plate and a front centering adjustment structure; the lower end of the front centering plate is flush with the conveying plane; the front centering adjustment structure drives the front centering plate to adjust back and forth; two side centering assemblies symmetrically arranged on the left and right sides of the conveying assembly; the side centering assembly includes a side centering drive structure, a centering connecting frame, and a plurality of side centering units arranged at intervals in the front-rear direction; the side centering drive structure drives the centering connecting frame to move in the left-right direction; the side centering unit is detachably connected to the centering connecting frame; a side avoidance component, when the front centering assembly moves to one of the side centering units, the side avoidance component separates the side centering unit from the centering connecting frame. This solution makes the forces on each part more balanced when the robotic arm grabs the sheet material, and can extend the service life of the robotic arm.

Description

Technical Field

[0001] The present invention relates to the technical field of transportation equipment, especially the sheet centering conveyor line. Background Art

[0002] During sheet production, it is usually necessary to use a manipulator at the end of the conveyor line to remove the sheet from the conveyor line and stack the sheets at other positions.

[0003] In the prior art, a small separate sheet centering conveyor line is provided at the end of the conveyor line. This sheet centering conveyor line is used to center the sheet to facilitate the subsequent neat stacking of the sheet. The above-mentioned sheet centering conveyor line generally includes side centering components located on both sides of the conveyor line and front centering components located on the front side of the conveyor line to center the sheet.

[0004] Since factories generally do not produce only sheets of a single size during production, the sheet centering conveyor line needs to have a certain adjustment space. In the prior art, the side centering components can move left and right, and the front centering components can move back and forth to adapt to sheets of different sizes. However, the side centering components generally adopt a scheme in which a plurality of cylindrical structures are arranged in the front-rear direction. The position of the front centering components will be limited by the cylindrical structures, resulting in poor adaptability of the front centering components to different sheets, and ultimately the sheet cannot be centered front and back. When the manipulator grabs the sheet, it will deviate from the center of the sheet in the front-rear direction, resulting in uneven forces on both sides of the manipulator. Long-term operation will cause damage to the manipulator, which is not conducive to ensuring the service life of the manipulator. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: to provide a sheet centering conveyor line to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or create conditions.

[0006] The solution of the present invention to solve its technical problem is:

[0007] The sheet centering conveyor line includes:

[0008] A conveying component, the conveying component is provided with a conveying plane;

[0009] A front centering component, the front centering component includes a front centering plate and a front centering adjustment structure; the lower end of the front centering plate is flush with the conveying plane; the front centering adjustment structure drives the front centering plate to adjust back and forth;

[0010] Two side centering components, the two side centering components are symmetrically arranged on the left and right sides of the conveying component; the side centering component includes a side centering driving structure, a centering connecting frame, and a plurality of side centering units arranged at intervals in the front-rear direction; the side centering driving structure drives the centering connecting frame to move in the left-right direction; the side centering unit is detachably connected to the centering connecting frame;

[0011] A side avoidance component, when the front centering component moves to one of the side centering units, the side avoidance component separates the side centering unit from the centering connecting frame.

[0012] As a further improvement of the above technical solution, the conveying component is provided with a plurality of first channels, the plurality of first channels are arranged in the left-right direction, and the first channels are arranged below the conveying plane; the lower end of the front centering plate is provided with a plurality of front limiting protrusions, the front limiting protrusions are lower than the conveying plane, the front limiting protrusions are correspondingly arranged with the first channels, and the front limiting protrusions slide in the first channels.

[0013] As a further improvement of the above technical solution, the side centering unit includes a seat body and a centering column; the seat body is used for connecting with the centering connecting frame, and the centering column is installed above the seat body; the centering column is used for contacting the side wall of the sheet material to limit the sheet material.

[0014] As a further improvement of the above technical solution, the centering column is rotatably connected to the seat body.

[0015] As a further improvement of the above technical solution, the front centering adjustment structure includes two front centering driving units, the two front centering driving units are respectively arranged on the left and right sides of the conveying component; the left and right ends of the front centering plate are respectively connected to the output ends of the two front centering driving units.

[0016] As a further improvement of the above technical solution, the front centering driving unit includes:

[0017] A guide rod, the guide rod extends in the front-rear direction;

[0018] A guide sliding seat, the guide sliding seat is slidably connected to the guide rod, and the front centering plate is fixed to the guide sliding seat;

[0019] A forward movement driving belt assembly, the guide sliding seat is fixedly arranged on the forward movement driving belt assembly;

[0020] A forward movement driving member, the forward movement driving member drives the forward movement driving belt assembly to move, so as to drive the guide sliding seat to move in the front-rear direction.

[0021] As a further improvement of the above technical solution, the two front centering drive units share the same forward movement drive member, and the forward movement drive belt assemblies of the two front centering drive units are connected by a connecting shaft, so that the two forward movement drive belt assemblies move synchronously.

[0022] As a further improvement of the above technical solution, the side avoidance component includes:

[0023] A control rod extending vertically, the control rod is slidably connected to the side centering unit in the vertical direction; the two ends of the control rod are a control end and a connection end respectively;

[0024] A connecting rod, one end of the connecting rod is hinged to the connection end;

[0025] A locking rod extending horizontally, the locking rod is hinged to the other end of the connecting rod, and the locking rod is slidably connected to the side centering unit in the horizontal direction;

[0026] A locking groove provided on the centering connecting frame, and the locking rod is inserted and matched with the locking groove;

[0027] A control moving seat, the control moving seat moves back and forth with the front centering plate, the control moving seat is provided with a control plane, and the control plane pushes the control end to move in the direction of the connection end;

[0028] A control reset member, the control reset member is used to drive the control end to reset in the direction away from the connection end;

[0029] When the control rod moves in the direction of the connection end, the inclination angle of the connecting rod increases, so that the end of the locking rod disengages from the locking groove.

[0030] As a further improvement of the above technical solution, the control end is of a hemispherical structure.

[0031] As a further improvement of the above technical solution, the number of the connecting rods, the locking rods and the locking grooves are all two respectively, and the two connecting rods, the two locking rods and the two locking grooves are symmetrically arranged on the front and rear sides of the control rod respectively.

[0032] The beneficial effects of the present invention are as follows: When it is necessary to adapt to different specifications of sheet materials, first reset the side centering component, and then the forward driving member drives the forward centering plate to move to a specified position. After the forward centering plate moves to the specified position, if the forward centering plate moves between the two side centering units, there is a risk of interference between the two ends of the forward centering plate and the side centering units. At this time, control the moving seat to move above the control rod, and at this time, the moving seat will press down the control rod, thereby driving the locking rod to retract into the seat body, and the locking rod is separated from the locking groove, so that the two side centering units on the left and right sides of the forward centering plate are separated from the centering connecting frame. Subsequently, the side centering driving structure drives the two centering connecting frames to approach each other, thereby driving a plurality of side centering units to move to adapt to different specifications of sheet materials. At this time, the two side centering units located on the left and right sides of the forward centering plate do not move to avoid collision between the forward centering plate and the side centering units, thereby ensuring the normal operation of the sheet material centering conveying line; and it can make the position of the forward centering plate steplessly adjustable, and can better adapt to different specifications of sheet materials to ensure that different specifications of sheet materials can be centered in the front-rear direction, so that the mechanical arm is more evenly stressed during grasping, and the service life of the mechanical arm can be effectively extended.

[0033] The present invention relates to the technical field of transportation equipment. Brief Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly describe the drawings required for the description of the embodiments. Obviously, the described drawings are only a part of the embodiments of the present invention, rather than all the embodiments. Without creative efforts, those skilled in the art can also obtain other design solutions and drawings based on these drawings.

[0035] Figure 1 is the overall structural schematic diagram of the embodiment of the present invention;

[0036] Figure 2 is the overall structural schematic diagram of another angle of the embodiment of the present invention;

[0037] Figure 3 is the overall structural schematic diagram of the embodiment of the present invention after hiding the frame and the conveying component;

[0038] Figure 4 is Figure 3 the partial enlarged schematic diagram of part A in

[0039] In the figure, 100 is the frame; 200 is the conveying assembly; 210 is the conveying drive motor; 220 is the conveying unit; 221 is the main conveying roller; 222 is the connecting conveying roller; 300 is the front centering assembly; 310 is the front centering drive unit; 311 is the guide rod; 312 is the guide sliding seat; 313 is the forward movement drive belt assembly; 314 is the forward movement drive member; 315 is the connecting shaft; 320 is the front centering plate; 321 is the front limit projection; 400 is the side centering assembly; 410 is the side centering unit; 411 is the centering cylinder; 412 is the seat body; 420 is the centering connecting frame; 430 is the side centering drive structure; 431 is the side centering drive member; 432 is the side centering drive belt assembly; 500 is the side avoidance assembly; 510 is the control rod; 520 is the connecting rod; 530 is the locking rod; 540 is the locking groove; 550 is the control moving seat; 560 is the control reset member. Detailed implementation manners

[0040] The following will clearly and completely describe the concept, specific structure and technical effects generated by the present invention in combination with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present invention. In addition, all the connection / connection relationships mentioned in the text do not simply refer to the direct connection of components, but refer to the more optimal connection structure that can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the present invention can be interactively combined without conflicting with each other.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is 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 of the present invention.

[0042] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, and understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0043] Refer to Figures 1 to 2, The sheet metal center conveying line includes a frame 100, a conveying assembly 200, a front centering assembly 300, a side centering assembly 400, and a side avoidance assembly 500.

[0044] The conveying assembly 200 is provided with a conveying plane. The conveying assembly 200 includes a conveying drive motor 210 and a plurality of conveying units 220. The conveying drive motor 210 is fixedly installed on the frame 100, and the conveying units 220 are rotatably installed on the frame 100. The plurality of conveying units 220 are arranged in the front-rear direction, and the drive structure of the conveying assembly 200 is the same as that of a conventional roller conveyor. The conveying drive motor 210 drives the plurality of conveying units 220 to move synchronously through a chain and a sprocket.

[0045] In this embodiment, the conveying unit 220 includes a plurality of main conveying rollers 221 and a plurality of connecting conveying rollers 222, and the plurality of main conveying rollers 221 and the plurality of connecting conveying rollers 222 are both arranged in the left-right direction.

[0046] The connecting conveying roller 222 is arranged between two adjacent main conveying rollers 221, and both ends of the connecting conveying roller 222 are fixedly connected to the two main conveying rollers 221 respectively. The diameter of the connecting conveying roller 222 is smaller than that of the main conveying roller 221, and the conveying plane is tangent to the upper ends of the main conveying rollers 221 of the plurality of conveying units 220, so that the conveying unit 220 forms a plurality of notches arranged in the left-right direction. The plurality of notches of the plurality of conveying units 220 are combined to form a plurality of first channels.

[0047] The front centering assembly 300 is arranged behind the frame 100, and the front centering assembly 300 includes a front centering adjustment structure and a front centering plate 320.

[0048] Specifically, the front centering adjustment structure includes two front centering drive units 310, and the two front centering drive units 310 are symmetrically installed on the left and right sides of the frame 100.

[0049] The front centering drive unit 310 includes: a guide rod 311, a guide sliding seat 312, a forward movement drive belt assembly 313, and a forward movement drive member 314.

[0050] The guide rod 311 is fixedly installed on the frame 100, and the guide rod 311 extends in the front-rear direction. Specifically, the guide rod 311 is a cylindrical smooth rod structure.

[0051] The guide sliding seat 312 is slidably connected to the guide rod 311.

[0052] The forward movement drive belt assembly 313 includes a synchronous belt and two synchronous wheels. Both synchronous wheels are rotatably connected to the frame 100. The synchronous belt bypasses the two synchronous wheels, and the synchronous belt meshes with the synchronous wheels.

[0053] The forward movement driving member 314 is fixedly installed on the frame 100. The forward movement driving member 314 is set as a servo motor. The output end of the forward movement driving member 314 is fixedly connected to the synchronous pulley located at the rear to drive the synchronous pulley to rotate, thereby driving the synchronous belt to work.

[0054] Specifically, in this embodiment, the two front centering drive units 310 share the same forward movement driving member 314. The forward movement drive belt assemblies 313 of the two front centering drive units 310 are connected by a connecting shaft 315. Both ends of the connecting shaft 315 are fixedly connected to the two synchronous pulleys, thereby realizing the power transmission of the two front centering drive units 310. In other embodiments, the two front centering drive units 310 can also be set to each be equipped with a forward movement driving member 314, but it is necessary to ensure that the driving speeds of the two forward movement driving members 314 are the same. Those skilled in the art can select the number of forward movement driving members 314 according to actual needs.

[0055] The lower end of the front centering plate 320 is flush with the conveying plane. The left and right ends of the front centering plate 320 are respectively fixedly connected to the guiding sliding seats 312 of the two front centering drive units 310, so that when the guiding sliding seats 312 move back and forth, the front centering plate 320 will move back and forth along with the guiding sliding seats 312.

[0056] Refer to Figure 3 , specifically, the lower end of the front centering plate 320 protrudes with a front limiting protrusion 321, and the front limiting protrusion 321 is lower than the conveying plane. The number of the front limiting protrusions 321 is set to be multiple. The multiple front limiting protrusions 321 are arranged in the left - right direction. The front limiting protrusions 321 are arranged in one - to - one correspondence with the first channels, and the front limiting protrusions 321 slide in the first channels.

[0057] The number of the side centering assemblies 400 is set to be two. The two side centering assemblies 400 are symmetrically arranged on the left and right sides of the frame 100. Specifically, the side centering assembly 400 includes a side centering unit 410, a centering connecting frame 420, and a side centering drive structure 430.

[0058] Specifically, in this embodiment, the two side centering assemblies 400 are driven by the same side centering drive structure 430. The side centering drive structure 430 drives the centering connecting frames 420 of the two side centering assemblies 400 to approach or move away from each other.

[0059] Specifically, in this embodiment, the side centering drive structure 430 includes a side centering drive member 431 and a side centering drive belt assembly 432. The side centering drive belt assembly 432 includes a synchronous belt and two synchronous pulleys. Both of the two synchronous pulleys are rotatably connected to the frame 100. The synchronous belt bypasses the two synchronous pulleys and meshes with the synchronous pulleys. The two synchronous pulleys of the side centering drive belt assembly 432 are arranged in the left-right direction. Both of the two synchronous pulleys are rotatably connected to the frame 100. The synchronous belt bypasses the two synchronous pulleys and is in transmission connection with the synchronous pulleys.

[0060] The two centering connection frames 420 of the two side centering assemblies 400 are respectively fixedly connected to the upper and lower sections of the synchronous belt of the side centering drive belt assembly 432. Since the upper and lower sections of the synchronous belt move in opposite directions during movement, by fixedly connecting the two centering connection frames 420 to the upper and lower sections of the synchronous belt of the side centering drive belt assembly 432 respectively, it can be made that the synchronous belt drives the two centering connection frames 420 to approach or move away from each other in the left-right direction during movement.

[0061] The number of side centering units 410 in each side centering assembly 400 is set to be multiple, and the multiple side centering units 410 are arranged at intervals in the front-rear direction.

[0062] Specifically, the side centering unit 410 includes a centering cylinder 411 and a seat body 412. The lower end surface of the seat body 412 abuts against the frame 100. The seat body 412 is slidably connected to the frame 100 in the left-right direction. A guide rail and a guide groove are provided between the seat body 412 and the frame 100 to limit the sliding direction of the seat body.

[0063] The centering cylinder 411 is installed above the seat body 412. The multiple centering cylinders 411 of the two side centering assemblies 400 cooperate to perform the centering step of the sheet material in the left-right direction.

[0064] Specifically, in this embodiment, the centering cylinder 411 is set to a cylindrical structure. During the side centering process, the outer peripheral surface of the centering cylinder 411 will contact the side wall of the sheet material, thereby restricting the position of the sheet material in the left-right direction. At the same time, the sheet material will be continuously conveyed forward. By setting the centering cylinder 411 to a cylindrical structure, the friction between the side centering unit 410 and the sheet material can be reduced.

[0065] Specifically, in this embodiment, the centering cylinder 411 is rotatably connected to the seat body 412. By setting the centering cylinder 411 to be rotatably connected to the seat body 412, the friction when the sheet material and the centering cylinder 411 have relative displacement in the front-rear direction can be reduced, thereby reducing the wear of the sheet material.

[0066] The side centering unit 410 and the centering connection frame 420 can be detachably connected, and the side centering unit 410 can move along the left-right direction with the centering connection frame 420.

[0067] Reference Figure 4 , specifically, the side avoidance component 500 includes: a joystick 510, a connecting rod 520, a locking rod 530, a locking groove 540, a control moving seat 550, and a control reset member 560.

[0068] The joystick 510 extends in the up and down direction, the joystick 510 is slidably connected to the seat body 412, and the upper and lower ends of the joystick 510 are respectively set as a connection end and a control end, and the control end is arranged above the connection end.

[0069] The control reset member 560 is arranged between the seat body and the joystick 510, the control reset member 560 is set as a spring, and the control reset member 560 is used to drive the joystick 510 to reset upward.

[0070] Specifically, in this embodiment, the control end is of a hemispherical structure so that other components can more easily drive the control end to move downward.

[0071] One end of the connecting rod 520 is hingedly connected to the connection end, and in the direction away from the connection end, the connecting rod 520 gradually inclines upward. In other embodiments, the connecting rod 520 in the normal state can also be set to be horizontal, and those skilled in the art can select the inclination angle of the connecting rod 520 according to actual needs.

[0072] The locking rod 530 is horizontally arranged, the locking rod 530 extends in the front and rear directions, the locking rod 530 extends in the front and rear directions with the seat body 412, and the locking rod 530 is hingedly connected to one end of the connecting rod 520 away from the connection end.

[0073] When the joystick 510 moves downward, the inclination angle of the connecting rod 520 increases, so that the locking rod 530 is received into the seat body 412, and when the joystick 510 moves upward, the locking rod 530 will extend out of the seat body 412.

[0074] The locking groove 540 is opened on the centering connecting frame 420, and the position of the locking groove 540 matches the position of the locking rod 530.

[0075] Specifically, in this embodiment, the number of the connecting rod 520, the locking rod 530, and the locking groove 540 are all respectively set to two. The two connecting rods 520, the two locking rods 530, and the two locking grooves 540 are respectively symmetrically arranged on the front and rear sides of the joystick 510.

[0076] When the current centering component 300 moves to one of the side centering units 410, the control moving seat 550 is manipulated to move above the control lever 510. The lower end surface of the control moving seat 550 abuts against the control end, and the control lever 510 deviates downward from its original position, so that the locking lever 530 is retracted into the seat body 412, and the locking lever 530 is separated from the locking groove 540. The side centering unit 410 is separated from the centering connecting frame 420. When the centering connecting frame 420 moves in the left - right direction, the side centering unit 410 does not move with the centering connecting frame 420, so as to prevent the side centering unit 410 from colliding with the front centering plate 320, thus ensuring the normal operation of the sheet - material centering conveying line.

[0077] The implementation process of this solution is as follows:

[0078] When it is necessary to adapt to different - specification sheet materials, first reset the side centering component 400, and then manipulate the forward - moving driving part 314 through the control system of the sheet - material centering conveying line to drive the front centering plate 320 to move to a specified position. After the front centering plate 320 moves to the specified position, if the front centering plate 320 moves between the two side centering units 410, there is a risk of interference between the two ends of the front centering plate 320 and the side centering units 410. At this time, the control moving seat 550 will automatically press down the control lever 510, thereby driving the locking lever 530 to be retracted into the seat body 412. The locking lever 530 is separated from the locking groove 540, so that the two side centering units 410 on the left and right sides of the front centering plate 320 are separated from the centering connecting frame 420. Subsequently, the side centering driving structure 430 drives the two centering connecting frames 420 to approach each other, thereby driving the movement of multiple side centering units 410 that are not separated from the centering connecting frame 420 to adapt to different - specification sheet materials. At this time, the two side centering units 410 separated from the centering connecting frame 420 do not move (that is, the two side centering units 410 on the left and right sides of the front centering plate 320), so as to prevent the two front centering plates 320 on the left and right sides of the front centering plate 320 from colliding with the side centering units 410, thus ensuring the normal operation of this sheet - material centering conveying line; and it can make the position of the front centering plate 320 infinitely adjustable, better adapt to different - specification sheet materials, ensure that different - specification sheet materials can be centered in the front - rear direction, so that the mechanical arm is more evenly stressed during grasping, and effectively extend the service life of the mechanical arm.

[0079] The above has specifically described the preferred embodiments of the present invention, but the present invention is not limited to the described embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present invention, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. Sheet centering conveyor line, characterized in that: Comprising: A conveying assembly provided with a conveying plane; A front centering assembly including a front centering plate and a front centering adjustment structure; the lower end of the front centering plate is flush with the conveying plane; the front centering adjustment structure drives the front centering plate to adjust back and forth; Two side centering assemblies symmetrically arranged on the left and right sides of the conveying assembly; the side centering assembly includes a side centering drive structure, a centering connecting frame, and a plurality of side centering units arranged at intervals in the front-rear direction; the side centering drive structure drives the centering connecting frame to move in the left-right direction; The side centering unit is detachably connected to the centering connecting frame; A side avoidance assembly, the side avoidance assembly includes: A control rod extending vertically, the control rod is slidably connected to the side centering unit in the vertical direction; the two ends of the control rod are respectively a control end and a connection end; A connecting rod, one end of the connecting rod is hinged to the connection end; A locking rod extending in the front-rear direction, the locking rod is hinged to the other end of the connecting rod, and the locking rod is slidably connected to the side centering unit in the front-rear direction; A locking groove provided on the centering connecting frame, the locking rod is inserted and matched with the locking groove; A control moving seat that moves back and forth with the front centering plate, the control moving seat is provided with a control plane, and the control plane pushes the control end in the direction of the connection end; A control reset member for driving the control end to reset in a direction away from the connection end; When the control moving seat moves to one of the side centering units, it drives the corresponding control rod of the side centering unit to move, so that the control end of the control rod moves in the direction of the connection end, the inclination angle of the connecting rod increases, and the end of the locking rod disengages from the locking groove, so that the side centering unit is separated from the centering connecting frame.

2. The sheet centering conveyor line according to claim 1, wherein: The conveying assembly is provided with a plurality of first channels arranged in the left-right direction, the first channels are arranged below the conveying plane; the lower end of the front centering plate is provided with a plurality of front limiting protrusions, the front limiting protrusions are lower than the conveying plane, the front limiting protrusions are correspondingly arranged with the first channels, and the front limiting protrusions slide in the first channels.

3. The sheet centering conveyor line according to claim 1, wherein: The side centering unit includes a seat body and a centering cylinder; the seat body is used for connecting with the centering connecting frame, and the centering cylinder is installed above the seat body; the centering cylinder is used for contacting the side wall of the sheet material to limit the sheet material.

4. The sheet centering conveyor line according to claim 3, wherein: The centering cylinder is rotatably connected to the seat body.

5. The sheet centering conveyor line according to claim 1, characterized in that: The front centering adjustment structure includes two front centering drive units respectively arranged on the left and right sides of the conveying assembly; the left and right ends of the front centering plate are respectively connected to the output ends of the two front centering drive units.

6. The sheet centering conveyor line according to claim 5, characterized in that: The front centering drive unit includes: A guide rod extending in the front-rear direction; A guide sliding seat slidably connected to the guide rod, the front centering plate is fixed to the guide sliding seat; A forward movement drive belt assembly, the guide sliding seat is fixedly arranged on the forward movement drive belt assembly; A forward movement driving member that drives the forward movement driving belt assembly to move, so as to drive the guiding sliding seat to move in the front-rear direction.

7. The sheet centering conveyor line according to claim 6, characterized in that: Two front centering driving units share the same forward movement driving member, and the forward movement driving belt assemblies of the two front centering driving units are connected by a connecting shaft, so that the two forward movement driving belt assemblies move synchronously.

8. The sheet centering conveyor line according to claim 1, characterized in that: The control end is in a hemispherical structure.

9. The sheet centering conveyor line according to claim 1, characterized in that: The number of the connecting rods, the locking rods and the locking grooves are all two respectively, and the two connecting rods, the two locking rods and the two locking grooves are symmetrically arranged on the front and rear sides of the control rod respectively.

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