Printing defect paper removing assembly of web offset press and printer structure

Abstract

The utility model relates to a defective printing paper removing assembly of a roll paper offset press and a printer structure. The defective printing paper removing assembly of the roll paper offset press comprises a first conveying part and a control part. The first conveying part is provided with a plurality of relatively independent lifting units, and the first conveying part fixes and conveys printing paper in a lifting mode. Defective paper and qualified paper in the printing paper fall off from the first conveying part and fall to different positions under the control action of the control part. Based on the scheme, in the printing paper conveying process, defective paper and qualified paper can fall to different positions correspondingly, and therefore the purpose of rapidly removing the defective paper can be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of printing presses, and in particular to a defective paper rejection component of a web offset printing press and a printing press structure. Background Art

[0002] Printing defects are inevitable in the process of printing on paper by a printing press. If products with printing defects flow into the market, it will inevitably cause consumer dissatisfaction. Therefore, it is a necessary step to remove paper with printing defects during (or after) the printing process of the printing press.

[0003] In traditional solutions, defective paper is generally marked after being identified, and is removed by manual sorting, which is time-consuming and labor-intensive.

[0004] In some existing solutions, printed products may be inspected by a specific device, and defective printed products may be sorted out after defects are detected. However, the printed paper in this solution is different from other printed products. During the printing process, the transmission speed of the printed paper is very fast, and the printed paper is stacked like fish scales, which is very difficult to grasp. Utility Model Content

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a defective paper rejection component for a web offset printing press and a printing press structure.

[0006] In a first aspect, the present application provides a defective paper rejection assembly for a web offset printing machine, comprising:

[0007] a first transmission unit and a control unit;

[0008] The first conveying part comprises a plurality of relatively independent lifting units, and the first conveying part fixes and conveys the printed paper in a lifting manner;

[0009] Under the control of the control unit, the defective paper and the qualified paper in the printing paper fall off from the first conveying unit respectively and fall to different positions.

[0010] Optionally, the lifting unit includes an air suction chamber;

[0011] The suction chamber sucks the printed paper in a manner of forming a negative pressure;

[0012] The control unit is used to control the suction chamber corresponding to the defective paper and the suction chamber corresponding to the qualified paper to release negative pressure at different positions.

[0013] Optionally, it also includes a grabbing unit;

[0014] The gripping unit is arranged below the first conveying part in the vertical direction; the gripping unit is used for gripping the defective paper on the first conveying part.

[0015] Optionally, the gripping unit includes a suction drum.

[0016] Optionally, the conveying direction of the suction drum is opposite to the conveying direction of the first conveying part.

[0017] Optionally, it further includes a second conveying part and a third conveying part. The second conveying part and the third conveying part are respectively arranged on both sides of the suction drum, and the conveying directions of the second conveying part and the third conveying part are opposite to the conveying direction of the first conveying part.

[0018] Optionally, it further includes a fourth conveying part;

[0019] The fourth conveying part is arranged upstream of the first conveying part in the conveying direction of the first conveying part. The conveying direction of the fourth conveying part is the same as the conveying direction of the first conveying part, and the first conveying part and the fourth conveying part overlap partially in the vertical direction;

[0020] The printed paper is stacked in a fish-scale shape on the fourth conveying part and is conveyed by the first conveying part;

[0021] The first conveying part is also used for lifting the printed paper from the fourth conveying part.

[0022] Optionally, the fourth conveying part includes a first conveying sub-part and a second conveying sub-part;

[0023] The conveying directions of the first conveying sub-part and the second conveying sub-part are the same. The first conveying sub-part is arranged upstream of the second conveying sub-part, and the first conveying part and the second conveying sub-part overlap at least partially in the vertical direction;

[0024] The second conveying sub-part is parallel to the first conveying part, and the first conveying sub-part and the second conveying sub-part form an angle less than 180° on the side away from the first conveying part.

[0025] Optionally, it further includes a fifth conveying part;

[0026] The fifth conveying part is arranged below the first conveying part in the vertical direction and overlaps with the first conveying part partially in the vertical direction;

[0027] The fifth conveying part is used for collecting the qualified paper.

[0028] In a second aspect, the present application also provides a printing machine structure, including the web offset printing defective paper removing assembly according to any one of the first aspect.

[0029] The present application provides a component for removing defective printing papers in a web offset press and a printing press structure. The component for removing defective printing papers in the web offset press includes: a first conveying part and a control part. The first conveying part is provided with a plurality of relatively independent lifting units, and the first conveying part fixes and conveys printing papers in a lifting manner. Defective papers and qualified papers among the printing papers respectively fall off from the first conveying part and drop to different positions under the control of the control part. Based on the above solution, the present application can make defective papers and qualified papers drop to different positions respectively during the process of conveying printing papers, so as to achieve the purpose of quickly removing defective papers. Description of the Drawings

[0030] Figure 1 Schematic structural diagram of a component for removing defective printing papers in a web offset press provided by an embodiment of the present application;

[0031] Figure 2 Schematic structural diagram of another component for removing defective printing papers in a web offset press provided by an embodiment of the present application;

[0032] Figure 3 Schematic structural diagram of another component for removing defective printing papers in a web offset press provided by an embodiment of the present application;

[0033] Figure 4 Schematic structural diagram of another component for removing defective printing papers in a web offset press provided by an embodiment of the present application. Detailed Embodiments

[0034] In order to more clearly understand the above objects, features and advantages of the present application, the solution of the present application will be further described below. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0035] Many specific details are set forth in the following description in order to fully understand the present application, but the present application may be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present application, rather than all the embodiments.

[0036] The following will exemplarily illustrate a component for removing defective printing papers in a web offset press and a printing press structure provided by an embodiment of the present application with reference to the drawings.

[0037] Figure 1 Schematic structural diagram of a component for removing defective printing papers in a web offset press provided by an embodiment of the present application, including:

[0038] A first conveying part 100 and a control part.

[0039] The first conveying unit 100 includes a plurality of relatively independent lifting units 101, and the first conveying unit 100 fixes and conveys the printed paper 000 in a lifting manner.

[0040] Under the control of the control unit, the defective paper 001 and the qualified paper 002 in the printed paper 000 respectively fall off from the first conveying unit 100 and drop to different positions.

[0041] First of all, it should be noted that in the embodiments of the present application, no improvement is made on how to identify the defective paper 001, so how to identify the defective paper 001 will not be described in detail in the embodiments of the present application either. The method for identifying the defective paper 001 can be any method well-known to those skilled in the art.

[0042] As Figure 1 shown, the first conveying unit 100 can be a functional unit capable of holding the printed paper 000, which conveys the printed paper 000 to a target position for further processing (such as cutting, storing, etc.) after the printing of the printed paper 000 is completed. In this process, each printed paper 000 is held and conveyed forward by the lifting unit 101 in the first conveying unit 100. When the control unit determines the defective paper 001, during the process of conveying the printed paper 000, the defective paper 001 can be made to fall off from the lifting unit 101 of the first conveying unit 100 during the conveying path, while the other qualified papers 002 continue to move forward under the drive of the first conveying unit 100 until they fall off at the target position corresponding to the qualified paper 002 (such as the end point of the first conveying unit 100). Among them, the first conveying unit 100 can be a conveyor belt. The Z direction is schematically shown in all the drawings of the embodiments of the present application, and the Z direction represents the upward direction in the vertical direction.

[0043] Since the dropping positions of the defective paper 001 and the qualified paper 002 are different, the defective paper 001 can be directly removed from the qualified paper 002, achieving the purpose of quickly removing the defective paper 001.

[0044] Continue to refer to Figure 1 , in some embodiments, the lifting unit 101 includes a suction cavity.

[0045] The suction cavity sucks the printed paper 000 in a manner of forming negative pressure.

[0046] The control unit is used to control the suction cavities corresponding to the defective paper 001 and the qualified paper 002 to release negative pressure at different positions.

[0047] As Figure 1As shown in the figure, for the specific solution of lifting and causing the defective paper 001 to fall off the lifting unit 101, the lifting unit 101 can be multiple independent air suction cavities. The first conveying part 100 can be a conveyor belt, and corresponding ventilation holes can be arranged on the conveyor belt surface of the conveyor belt. Under the action of the air suction cavity, the air pressure in the air suction cavity is lower than the external air pressure, and the printed paper 000 can be adsorbed on the surface of the first conveying part 100 based on the action of the air pressure and be driven forward by the first conveying part 100. In the embodiments of the present application, a relatively large number of lifting units 101 (air suction cavities) are schematically shown in the drawings. However, in actual scenarios, the number of lifting units 101 (air suction cavities) can be freely determined according to actual situations. For example, only 3 lifting units 101 (air suction cavities) can be set.

[0048] When the defective paper 001 is recognized and it is determined that the defective paper 001 reaches the corresponding falling position, the control unit can control the air suction cavity at the corresponding position of the defective paper 001 to stop sucking air, or control the air suction cavity at the corresponding position of the defective paper 001 to change from the air suction state to the blowing state. Therefore, the defective paper 001 can no longer be adsorbed on the first conveying part 100 based on the action of the air pressure. The air suction cavities corresponding to other qualified papers 002 continue to maintain the air suction state, and the qualified papers 002 continue to be adsorbed on the first conveying part 100 based on the action of the air pressure and are driven forward by the first conveying part 100. Until the qualified paper 002 reaches its corresponding falling position, the first conveying part 100 releases the qualified paper 002, or after the qualified paper 002 reaches its corresponding falling position, the first conveying part 100 can no longer actively adsorb the qualified paper 002, and the qualified paper 002 naturally falls off on the first conveying part 100.

[0049] In summary, the embodiments of the present application can separate the defective paper 001 and the qualified paper 002 based on the above solutions and eliminate the defective paper 001.

[0050] Figure 2 It is a schematic structural diagram of a component for eliminating printed defective paper 001 in an offset press provided by an embodiment of the present application. In some embodiments, a grasping unit 600 is further included.

[0051] The grasping unit 600 is arranged below the first conveying part 100 in the vertical direction. The grasping unit 600 is used to grasp the defective paper 001 on the first conveying part 100.

[0052] As Figure 2 shown, the grasping unit 600 is similar to the lifting unit 101 of the first conveying part 100 in function, and both are used to "fix" the printed paper 000. However, the difference is that the lifting unit 101 is used to fix all the printed papers 000, while the grasping unit 600 is only used to fix the defective paper 001.

[0053] Therefore, on the basis that the grasping unit 600 is arranged below the first conveying unit 100 in the vertical direction, it is also possible to enable the printed paper 000 to brush past the grasping unit 600 during the process of being conveyed by the first conveying unit 100. Whether it is the defective paper 001 or the qualified paper 002, during the process of brushing past the grasping unit 600, either it brushes past the grasping unit 600 relatively independently, or it brushes past the grasping unit 600 in a way of overlapping like fish scales. In either case, the grasping unit 600 can accurately grasp the defective paper 001 and remove the defective paper 001 from the first conveying unit 100.

[0054] Specifically, after determining the defective paper 001, the control unit can control the grasping unit 600 to remove the defective paper 001 from the first conveying unit 100 when further determining the position where the defective paper 001 passes through the grasping unit 600.

[0055] More specifically, during the process of removing the defective paper 001, it is possible to control the lifting unit 101 corresponding to the defective paper 001 to stop operating, no longer fix the defective paper 001, and control the grasping unit 600 to fix the defective paper 001.

[0056] Alternatively, during the process of removing the defective paper 001, it is possible to control all the lifting units 101 to operate normally (i.e., maintain the state of lifting the printed paper 000), and control the grasping unit 600 to fix the defective paper 001 and remove the defective paper 001 from the first conveying unit 100. For this implementation manner, it is more similar to the grasping unit 600 pulling the defective paper 001 off the first conveying unit 100. Based on the function of the grasping unit 600 in this real-time manner, the fixing force of the grasping unit 600 on the defective paper 001 needs to be greater than the fixing force of the first conveying unit 100 on the defective paper 001.

[0057] In summary, based on the above solution, the embodiment of the present application can remove the defective paper 001 through the grasping unit 600 to complete the removal action of the defective paper 001.

[0058] Continue to refer to Figure 2 In some embodiments, the grasping unit 600 includes a suction drum.

[0059] As Figure 2 shown, a plurality of suction cavities can be arranged on the suction drum, and it can also adsorb the defective paper 001 based on the action of air pressure. The suction drum can rotate continuously during operation. In this way, not only can the purpose of removing the defective paper 001 be achieved, but also the defective paper 001 can be quickly taken away, enabling the suction drum to continue to adsorb other defective papers 001 to complete the removal action of multiple defective papers 001.

[0060] Continue to refer toFigure 2 , in some embodiments, the conveying direction of the suction drum is opposite to that of the first conveying part 100.

[0061] As Figure 2 shown, when the conveying direction of the suction drum is opposite to that of the first conveying part 100, the suction drum can separate the defective paper 001 from the qualified paper 002 after adsorbing the defective paper 001.

[0062] If the conveying direction of the suction drum is the same as that of the first conveying part 100, it may cause the stacking or bending of the defective paper 001 and the qualified paper 002.

[0063] Figure 3 This is a schematic structural diagram of a component for removing printed defective paper 001 of a web offset press provided by an embodiment of the present application. In some embodiments, it further includes a second conveying part 200 and a third conveying part 300. The second conveying part 200 and the third conveying part 300 are respectively arranged on both sides of the suction drum, and the conveying directions of the second conveying part 200 and the third conveying part 300 are opposite to that of the first conveying part 100.

[0064] The specific positions of the second conveying part 200 and the third conveying part 300 are as Figure 3 shown. After the grasping unit 600 removes the defective paper 001, the second conveying part 200 and the third conveying part 300 can cooperate with the grasping unit 600 to convey the defective paper 001 to the corresponding target position. And although the qualified paper 002 may also overlap on the third conveying part 300, since the first conveying part 100 fixes the qualified paper 002, it will not affect the qualified paper 002. Moreover, the third conveying part 300 can also play a certain role in supporting the qualified paper 002 and reduce the possibility of the qualified paper 002 falling off.

[0065] Figure 4 This is a schematic structural diagram of a component for removing printed defective paper 001 of a web offset press provided by an embodiment of the present application. In some embodiments, it further includes a fourth conveying part 400.

[0066] The fourth conveying part 400 is arranged upstream of the first conveying part 100 in the conveying direction. The conveying direction of the fourth conveying part 400 is the same as that of the first conveying part 100, and the first conveying part 100 and the fourth conveying part 400 overlap partially in the vertical direction.

[0067] The printed papers 000 are stacked in a fish-scale shape on the fourth conveying part 400 and conveyed by the first conveying part 100.

[0068] The first transfer unit 100 is also used to lift the printed paper 000 from the fourth transfer unit 400.

[0069] As Figure 4 shown, the fourth transfer unit 400 can transfer the printed paper 000 quickly. Specifically, referring back to Figure 4 , in some embodiments, the fourth transfer unit 400 includes a first transfer sub-unit 401 and a second transfer sub-unit 402.

[0070] The first transfer sub-unit 401 and the second transfer sub-unit 402 have the same transfer direction. The first transfer sub-unit 401 is disposed upstream of the second transfer sub-unit 402, and the first transfer unit 100 and the second transfer sub-unit 402 at least partially overlap in the vertical direction.

[0071] The second transfer sub-unit 402 is parallel to the first transfer unit 100, and the first transfer sub-unit 401 and the second transfer sub-unit 402 form an angle less than 180° on the side away from the first transfer unit 100.

[0072] As Figure 4 shown, Figure 4 in

[0073] the angle formed by the first transfer sub-unit 401 and the second transfer sub-unit 402 on the side away from the first transfer unit 100 is denoted as α. Since the second transfer sub-unit 402 and the first transfer sub-unit 401 form a certain angle, when the first transfer sub-unit 401 transfers the printed paper 000 to below the first transfer unit 100 and the first transfer unit 100 fixes it, the printed paper 000 is in an upwardly warped state, which is more conducive to the first transfer unit 100 fixing the printed paper 000. And the second transfer sub-unit 402 has the same transfer direction as the first transfer unit 100, which can assist the first transfer unit 100 in transferring the printed paper 000 and support the printed paper 000, reducing the possibility of the printed paper 000 falling off. Figure 4 Referring back to

[0074] , in some embodiments, a fifth transfer unit 500 is further included.

[0075] The fifth transfer unit 500 is disposed below the first transfer unit 100 in the vertical direction and at least partially overlaps with the first transfer unit 100 in the vertical direction.

[0076] As Figure 4 shown, after the qualified paper 002 reaches the end of the first transfer unit 100, the first transfer unit 100 can put down the qualified paper 002, or the qualified paper 002 automatically falls off from the first transfer unit 100 and is transferred to its corresponding target position through the action of the fifth transfer unit 500, facilitating further processing by the staff.

[0077] The embodiment of the present application further provides a printing press structure, including a web offset press printing defect paper removing component as described in any one of the above embodiments of the web offset press printing defect paper removing component.

[0078] The printing press structure provided by the embodiment of the present application has the same technical features as the above embodiment of the web offset press printing defect paper removing component. Therefore, it can solve the same technical problems and achieve the same technical effects, which will not be elaborated herein.

[0079] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0080] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A web offset press printing defect paper rejection component, characterized in that, Comprising: A first conveying unit and a control unit; The first conveying unit includes a plurality of relatively independent lifting units, and the first conveying unit fixes and conveys printing paper in a lifting manner; Defective paper and qualified paper in the printing paper respectively fall off from the first conveying unit and drop to different positions under the control of the control unit.

2. The web offset press printing defect paper removing component according to claim 1, wherein The lifting unit includes a suction chamber; The suction chamber sucks the printing paper by forming a negative pressure; The control unit is used to control the suction chambers corresponding to the defective paper and the suction chambers corresponding to the qualified paper to release negative pressure at different positions.

3. The web offset press printing defect paper removing component according to claim 1, characterized in that, It further includes a grasping unit; The grasping unit is arranged below the first conveying unit in the vertical direction; the grasping unit is used to grasp the defective paper on the first conveying unit.

4. The web offset press printing defect paper removing assembly according to claim 3, characterized in that, The grasping unit includes a suction drum.

5. The web offset press printing defect paper removal component according to claim 4, characterized in that The conveying direction of the suction drum is opposite to the conveying direction of the first conveying unit.

6. The web offset press printing defect paper rejection assembly according to claim 5, characterized in that, It further includes a second conveying unit and a third conveying unit, the second conveying unit and the third conveying unit are respectively arranged on both sides of the suction drum, and the conveying directions of the second conveying unit and the third conveying unit are opposite to the conveying direction of the first conveying unit.

7. The web offset press printing defect paper rejection assembly according to any one of claims 1-6, characterized in that, It further includes a fourth conveying unit; The fourth conveying unit is arranged upstream of the first conveying unit in the conveying direction, the conveying direction of the fourth conveying unit is the same as the conveying direction of the first conveying unit, and the first conveying unit and the fourth conveying unit overlap partially in the vertical direction; The printing paper is stacked in a fish-scale shape on the fourth conveying unit and is conveyed by the first conveying unit; The first conveying unit is further used to lift the printing paper from the fourth conveying unit.

8. The web offset press printing defect paper rejection assembly according to claim 7, characterized in that, The fourth conveying unit includes a first conveying sub-unit and a second conveying sub-unit; The first conveying sub-unit and the second conveying sub-unit have the same conveying direction, the first conveying sub-unit is arranged upstream of the second conveying sub-unit, and the first conveying unit and the second conveying sub-unit overlap partially in the vertical direction; The second conveying sub-unit is parallel to the first conveying unit, and the first conveying sub-unit and the second conveying sub-unit form an angle less than 180° on the side away from the first conveying unit.

9. The web offset press printing defect paper rejection assembly according to claim 1, characterized in that, It further includes a fifth conveying unit; The fifth conveying unit is arranged below the first conveying unit in the vertical direction and overlaps partially with the first conveying unit in the vertical direction; The fifth conveying unit is used to collect the qualified paper.

10. A printing press structure, characterized in that, Including the printing defect paper removing assembly of the web offset press according to any one of claims 1-9.

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