Automatic Image Positioning System for Sheet Materials

Abstract

To provide an automatic image positioning system for a sheet material which utilizes a photoelectric detection device for executing positioning and positioning correction of a material, stabilizes a material using a vacuum suction component, and has advantages such as high system positioning accuracy, high positioning correction accuracy and strong material adaptability.SOLUTION: An automatic positioning system is used for conveying a sheet material to a sheet gripper bar from a feeding place (1). The automatic positioning system includes a first conveyance device (2) and a second conveyance device (3), the automatic positioning system further includes a photoelectric detection device (4) used for executing positioning and positioning correction of a sheet material, and the photoelectric detection device is provided to a start end of the second conveyance device.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an automated registration system, and in particular to an automated image registration system for sheet material. [Background technology]

[0002] background Die-cutting machine is a paper packaging and post-printing mechanical device and is mainly used for cardboard and corrugated board die-cutting (full cut, half cut), impression and lettering operations, as well as automatic waste discharge. Die-cutting machine rotates the printed matter or cardboard and cuts it into a specific shape by using a template, a die, a steel wire, a copper plate, a lead plate or a steel plate engraved by a knife by applying a specific pressure by using an embossing plate.

[0003] However, during the compression molding process, the compressed material has a certain positional deviation on the feeding device, especially in the cardboard die-cutting, the process is carried out continuously, and the accumulation of various factors will reduce the die-cutting precision and result in poor compression molding quality. Therefore, there is a need to set up a corresponding positioning system.

[0004] Most of the existing positioning systems use physical stop blocks for positioning, and some jaggedness is easily caused on the material. For the installed cardboard or corrugated board, the printing paper is deformed after being installed by glue, and the cardboard error is larger. As a result, the accuracy error occurring in the die-cutting after the physical front stop block is used for positioning is also increased.

[0005] In most existing positioning systems, the material is conveyed in a fish scale manner. When the material to be compressed is being positioned and positioned for correction, the rear of the material is lifted by the next piece of material, so that the corrected material is not naturally flattened and the next piece of material is still moving. In this case, the positioning correction accuracy of the material is affected. Summary of the Invention

[0006] overview SUMMARY OF THE PRESENT EMBODIMENT It is an object of the present invention to provide an automatic image registration system for sheet material to overcome the above-mentioned deficiencies in the prior art.

[0007] The object of the present invention can be achieved by the following technical solutions: An automatic image registration system for sheet material is provided, which is used for transporting sheet material from a feeding location to a paper gripper bar, the automatic positioning system includes a first transport device and a second transport device, the first transport device, the second transport device and the paper gripper bar have the same transport speed when transferring the transported sheet material to each other, and the second transport device has the functions of longitudinal correction, lateral correction and rotation angle correction; and the automatic positioning system further includes a photoelectric detection device used for performing positioning for the sheet material, and the photoelectric detection device is disposed at the starting end of the second transport device.

[0008] Preferably, the photoelectric detection device includes a bracket and a photoelectric detection element used to perform positioning detection on the sheet material, the bracket being arranged at a starting end of the second conveying device and the photoelectric detection element being fixed to the bracket.

[0009] Preferably, positioning marks provided on the leading and side edges or at set locations of the sheet material are used as reference locations for positioning.

[0010] Preferably, the positioning correction of the sheet material includes a lateral correction, a longitudinal correction and a rotation angle correction, where the lateral direction is along the conveying direction and the longitudinal direction is perpendicular to the conveying direction, so that the sheet material arrives at an accurately predetermined position.

[0011] Preferably, after entering the second conveying device having a vacuum suction device, the front of the sheet material stops or moves at the same constant speed as the conveyor belt of the second conveying device, and the sheet material is then detected by a photoelectric detection device. but detection do The photoelectric detection device in this case detects a specific position of the sheet material after it has passed the area and after it has been attracted to the conveyor belt of the second transport device.

[0012] Preferably, the system employs a single sheet transport method per cyclic process during transport of the sheet material.

[0013] Preferably, when the sheet material conveying frequency is less than the set value, the first conveying device and the second conveying device complete the conveying in one working cycle (i.e., one working cycle from when the sheet material comes from the feeding location to when it enters the paper gripper bar); and When the conveying frequency of the sheet material is greater than the set value, the first conveying device and the second conveying device complete the conveying separately in one independent working cycle.

[0014] Preferably, the first conveying device includes a first drive component and a group of at least two first conveyor belt components; Each set of the first conveyor belt components includes a first conveyor plate, a first conveyor belt, a first driven gear and four first sub gears, the first conveyor belt is respectively connected to the first driven gear and the four first sub gears, the first conveyor belt rotates under the driving of the first driven gears, and the first drive component includes a first servo motor and a first drive shaft, the first servo motor is connected to the first drive shaft, there is a driving connection between the first drive shaft and the first driven gears, the servo motor drives the first drive shaft to rotate, and the first drive shaft drives the first driven gear to rotate.

[0015] Preferably, the second conveying device includes a vacuum suction component, a second driving component and a group of four second conveyor belt components; each set of second conveyor belt components includes a second conveyor belt, a second driven gear and a second counter gear, the second conveyor belt and the second driven gear are connected to the second counter gear, the second drive component includes a second servo motor and a second drive shaft, the second servo motor is connected to the second drive shaft, the second drive shaft is connected to the second driven gear, the second servo motor drives the second drive shaft to rotate, and the second drive shaft drives the second driven gear to rotate; and The vacuum suction component is disposed below the second conveyor belt, the second conveyor belt includes a plurality of suction holes, and the vacuum suction component and the suction holes on the conveyor belt are connected.

[0016] Preferably, four second conveyor belts component In the group of two centrally located second conveyor belts component group is suitable for any sheet material that meets the specifications, and the suction function must be activated once the material is present; and the suction function is activated by two second conveyor belts located on the outside. component is effective when the group has an effect on the sheet material being transported.

[0017] Compared with the prior art, the present invention has the following advantages: (1) A photoelectric detection device is used to perform positioning and positioning correction for the material. Compared with the traditional method in which the edge of the material is positioned by alignment and blocking, in the present invention, the positioning can be completed more accurately and the accuracy of the positioning system can be guaranteed. (2) The second conveying device uses a vacuum adsorption component to ensure the stability of the material on the conveyor belt, thus improving the conveying reliability and reducing the influence of the conveying process on the positioning accuracy. (3) At present, in the existing positioning system, the conveying is performed in a fish scale manner, and the rear of the corrected material is lifted by the next piece of material, so that the corrected material is not naturally flattened, and the next piece of material is still moving. In this case, the correction accuracy of the material is affected. However, in the present invention, a single sheet material conveying method is used to improve the positioning accuracy and position correction accuracy of the material. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic diagram of an automatic image registration system for sheet material in accordance with the present invention. [Diagram 2] FIG. 2 is a plan view of an automated image registration system for sheet material in accordance with the present invention. [Diagram 3] FIG. 3 is a side view of an automated image registration system for sheet material in accordance with the present invention. [Figure 4] FIG. 4 is a partial schematic diagram of an automatic image registration system for sheet material in accordance with the present invention. [Diagram 5] FIG. 5 is a schematic diagram of an automatic image registration system for sheet material in actual use according to the present invention. [Figure 6] FIG. 6 is a partial structural diagram of a second transport device in an automatic image registration system for sheet material according to the present invention. [Figure 7] FIG. 7 is a schematic diagram of the calculation of correction amounts for an automatic image registration system for sheet material according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Detailed Description of the Embodiments The technical solutions in the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are not all the embodiments of the present invention but some embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without ingenuity should belong to the scope of protection of the present invention.

[0020] Embodiment An automatic image positioning system for sheet material is provided. The automatic positioning system is used to transport sheet material from a feeding location 1 to a paper gripper bar 5. As shown in Fig. 1, the automatic image positioning system for sheet material includes a first transport device 2, a second transport device 3 and a photoelectric detection device 4. The first transport device 2, the second transport device 3 and the paper gripper bar 5 have the same transport speed when transferring the transported sheet material to each other, the photoelectric detection device 4 is disposed at the starting end of the second transport device 3, and the photoelectric detection device 4 is used to perform positioning and positioning correction for the sheet material. The photoelectric detection device 4 can specifically be a color mark sensor, an industrial camera or a width and edge measurement sensor.

[0021] The present invention adopts a single-sheet conveying method in the conveying process, and marks (printed or engraved) on the leading edge and side edges or on determined positions of a single sheet material (such as cardboard and a synthetic material plate with certain flexibility) are used as reference positions for positioning.

[0022] 1, the photoelectric detection device 4 includes a bracket and a photoelectric detection element. The bracket is disposed at the starting end of the second conveying device 3. The photoelectric detection element is fixed to the bracket and is used to perform positioning detection on the sheet material.

[0023] The positioning and detection process is as follows: a sheet material is sucked (grabbed) at the feeding station 1 on the right side of Fig. 1 and then pulled out from the pile of paper and sent to the first conveyor belt 203. The first conveyor belt 203 moves the sheet material at a set speed to the second conveyor belt 305. After entering the second conveyor belt 305 with a vacuum suction device, the front part of the sheet material stops or moves at the same constant speed as the second conveyor belt 305 and the sheet material is then detected by the photoelectric detection device 4 in this case. but detection do After the sheet material has been attracted to the second conveyor belt 305, the photoelectric detection device 4 in this case detects a specific position of the sheet material.

[0024] As shown in Fig. 2-4, the first conveying device 2 includes a first drive component and a group of five first conveyor belt components. Each group of the first conveyor belt components includes a first conveyor plate 206, a first conveyor belt 203, a first driven gear 204 and four first sub-gears 205. The first conveyor belt 203 rotates under the drive of the first driven gear 204. The first conveyor belt 203 covers the upper surface of the first conveyor plate 206. The first drive component includes a first servo motor 201 and a first drive shaft 202. The first servo motor 201 drives the first drive shaft 202 to rotate. There is a drive connection between the first drive shaft 202 and the first driven gear 204. Furthermore, the first drive shaft 202 drives the driven gears to rotate.

[0025] As shown in FIG. 2 to FIG. 4, the second conveying device 3 includes a vacuum suction component, a second driving component, and a group of four second conveyor belt components. Each group of the second conveyor belt components includes a second conveyor belt 305, a second driven gear 303, and a second sub gear 304. The second conveyor belt 305 is connected to the second driven gear 303 and the second sub gear 304. The second driving component includes a second servo motor 301 and a second driving shaft 302. The second servo motor 301 drives the second driving shaft 302 to rotate, the second driving shaft 302 is connected to the second driven gear 303, and the second driving shaft 302 drives the second driven gear 303 to rotate. The vacuum suction component is disposed below the second conveyor belt 305, the second conveyor belt 305 is provided with a plurality of suction holes 306, and the vacuum suction component communicates with the suction holes 306 on the conveyor belt. Two second conveyor belts disposed in the middle component This group is suitable for any sheet material that meets the specifications and the suction function must be activated once the material to be conveyed is present. The suction function is activated when the group of two second conveyor belt components arranged on the outside has an effect on the sheet material to be conveyed.

[0026] As shown in FIG. 5, when the system is used, a sheet material is sent to the first conveying device 2, the front of which is provided with a printing mark, and the first conveying device 2 conveys the sheet material to the second conveying device 3. When the sheet material is conveyed to the second conveying device 3, the conveyed material stops or advances at the same speed as the second conveyor belt 305, and the conveyed material is adsorbed to the second conveyor belt 305 by the vacuum adsorption component. In this case, the photoelectric detection device 4 locates the position of the sheet material and sends the positioning data to the control device. The control device compares the positioning data with the preset theoretical data and calculates the distance and rotation angle that the second conveying device needs to operate (i.e., the distance and rotation angle that need to be corrected for the material), and then sends the second conveying device 3 to the second conveying device 3. device 3 is informed of its progress with the corrected data and the subsequent transfer of the material to the paper gripper bar 5.

[0027] The second transport device 3 performs positioning corrections on the sheet material during the transport process, the correction process including lateral (along the transport direction), longitudinal (perpendicular to the transport direction) and rotation angle corrections, so that the sheet material arrives at an exactly predetermined position.

[0028] When the paper gripper bar 5 grabs the sheet material and starts to move, the vacuum suction device of the second conveying device 3 closes and air pressure is injected to release the adsorbed sheet material and the conveying of the sheet material is completed.

[0029] The specific process of horizontal (along the conveying direction) correction, vertical (perpendicular to the conveying direction) correction and rotation angle correction is as follows: Lateral correction is performed by changing the conveying speed of the second conveying device 3 by the second servo motor 301, longitudinal correction (perpendicular to the conveying direction) is performed by driving the second conveying device 3 by the longitudinal correction servo motor 7, and rotation angle correction is performed by driving the second conveying device 3 to rotate by the rotation angle correction servo motor 6.

[0030] In FIG. 7, the amount of correction is shown, and X3-X 30 is the vertical correction displacement;

[0031]

number

[0032] is the lateral correction displacement; and

[0033]

number

[0034] is the correction angle.

[0035] The present invention is particularly suitable for mounted cardboard (or corrugated board), and since the printed paper is deformed after being mounted by glue, the cardboard error is even larger (reaching or exceeding 0.5 mm). As a result, the accuracy error occurring in the die-cutting after the physical front stop block is used for positioning is also increased.

[0036] The first transport device 2 and the second transport device 3 of the present invention can adopt two embodiments. R: 1) The first conveying device 2 and the second conveying device 3 complete the conveying in one working cycle (i.e., one working cycle from when the sheet material comes from the bottom feeding place 1 to when it enters the paper gripper bar system). This method can be used when the material conveying frequency is low (generally less than 2000 sheets per hour). 2) When the material conveying frequency is high (generally more than 2000-3000 sheets per hour), the time left for the photoelectric detection device 4 to read is shorter, the reading failure easily occurs, and the system cannot operate normally. In this case, the first conveying device 2 and the second conveying device 3 complete the conveying separately in one independent working cycle. In this manner, there is more time for the photoelectric detection device 4 to read, and the conveying frequency adopted by the system is higher.

[0037] The above embodiments are only intended to illustrate the technical solutions of the present invention, and do not limit the present invention. Those skilled in the art may think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims. [Explanation of symbols]

[0038] 1 Feeding location 2. First transport device 201 1st servo motor 202 First drive shaft 203 First Conveyor Belt 204 1st driven gear 205 1st sub gear 206 First conveyor plate 3 Second transport device 301 Second servo motor 302 Second drive shaft 303 Second driven gear 304 Second sub gear 305 Second Conveyor Belt 306 Suction hole 4. Photoelectric detection devices 5 Paper Gripper Bars 6 Rotation angle correction servo motor 7 Longitudinal correction servo motor

Claims

1. An automatic image positioning system for sheet material, the automatic image positioning system being used for transporting the sheet material from a feeding location (1) to a paper gripper bar (5), the automatic image positioning system having a first transport device (2) and a second transport device (3), the automatic image positioning system adopting a single sheet transport method per circulation process during the transport of the sheet material, the first transport device (2), the second transport device (3) and the paper gripper bar (5) having the same transport speed when transferring the transported sheet material to each other, the second conveying device (3) performs longitudinal correction, lateral correction and rotation angle correction, where, based on a plane where the sheet material contacts the automatic image positioning system, the lateral direction is along the conveying direction on the plane, the longitudinal direction is perpendicular to the conveying direction on the plane, and the rotation axis of the rotation angle is perpendicular to the plane; and the automatic image positioning system further comprises a photoelectric detection device (4) used to perform positioning on the sheet material, and the photoelectric detection device (4) is arranged at a starting end of the second conveying device (3), The automatic image positioning system further comprises a control device; After the sheet material is attracted to the conveyor belt of the second conveying device (3), the photoelectric detection device (4) in this case detects positioning data indicating a specific position of the sheet material and sends the positioning data to the control device, which compares the positioning data with preset theoretical data and calculates the distance and rotation angle that the second conveying device needs to operate, and the second conveying device (3) is informed of its progress according to the corrected data and of the transfer of the material to the paper gripper bar (5); the second conveying device (3) comprises a vacuum suction component, a second drive component and a group of four second conveyor belt components, each group of second conveyor belt components having a second conveyor belt (305); the vacuum suction component is positioned below the second conveyor belt (305), the second conveyor belt (305) has a plurality of suction holes (306), and the vacuum suction component and the suction holes (306) on the second conveyor belt (305) are connected.

2. 2. The automatic image positioning system for sheet materials according to claim 1, wherein the photoelectric detection device (4) has a photoelectric detection element used to perform positioning detection on a bracket and the sheet material, the bracket being arranged at the starting end of the second conveying device (3) and the photoelectric detection element being fixed to the bracket.

3. 2. The automatic image registration system for sheet material according to claim 1, wherein registration marks provided on the leading and side edges or on set positions of the sheet material are used as reference positions for registration.

4. 2. The automatic image registration system for sheet material of claim 1, wherein the positioning corrections performed on the sheet material include the lateral correction, the longitudinal correction and the rotation angle correction so that the sheet material arrives at an accurate predetermined position.

5. 2. The automatic image positioning system for sheet material according to claim 1, wherein after entering the second conveying device (3) having a vacuum suction device, the front part of the sheet material stops or moves at the same constant speed as the conveyor belt of the second conveying device (3) and the sheet material passes through an area detected by the photoelectric detection device (4) in this case.

6. when the conveying frequency of the sheet material is less than a set value, the first conveying device (2) and the second conveying device (3) complete the conveying in one working cycle, i.e. from when the sheet material comes from the feeding location (1) to when it enters the paper gripper bar (5); and when the conveying frequency of the sheet material is greater than a set value, the first conveying device (2) and the second conveying device (3) separately complete the conveying in one independent working cycle; 10. An automated image registration system for sheet material according to claim 1.

7. said first conveying device (2) having a first drive component and a group of at least two first conveyor belt components; Each group of first conveyor belt components includes a first conveyor plate (206), a first conveyor belt (203), a first driven gear (204) and four first secondary gears (205), the first conveyor belt (203) is connected to the first driven gear (204) and the four first secondary gears (205), the first conveyor belt (203) rotates under the drive of the first driven gear (204), the first drive component is driven by a first servo motor (206), the first servo motor (206 ... the first servo motor (201) is connected to the first drive shaft (202), there is a drive connection between the first drive shaft (202) and the first driven gear (204), the servo motor (201) drives the first drive shaft (202) to rotate, and the first drive shaft (202) drives the first driven gear (204) to rotate; 10. An automated image registration system for sheet material according to claim 1.

8. An automated image positioning system for sheet material as described in claim 1, wherein each group of second conveyor belt components further has a second driven gear (303) and a second sub gear (304), the second conveyor belt (305) is connected to the second driven gear (303) and the second sub gear (304), the second drive component has a second servo motor (301) and a second drive shaft (302), the second servo motor (301) is connected to the second drive shaft (302) and the second drive shaft (302) is connected to the second driven gear (303), the second servo motor (301) drives the second drive shaft (302) to rotate, and the second drive shaft (302) drives the second driven gear (303) to rotate.

9. 9. The automatic image registration system for sheet material of claim 8, wherein the group of four second conveyor belt components comprises a group of two centrally located second conveyor belt components and a group of two outerly located second conveyor belt components, the group of two centrally located second conveyor belt components being suitable for any sheet material that meets a specification, the vacuum suction component attracts the sheet material to the group of two centrally located second conveyor belt components once the sheet material enters the second transport device; and the vacuum suction component attracts the sheet material to the group of two centrally located second conveyor belt components and the group of two outerly located second conveyor belt components when the sheet material is large enough to reach the group of two outerly located second conveyor belt components.

Images