Paper conveying device and image forming apparatus

Abstract

The present application provides a paper conveying device and an image forming apparatus. The paper conveying device includes a paper feeding unit configured to feed a paper to a paper conveying path, a conveying unit configured to convey the paper along the paper conveying path, a skew correction unit located in the paper conveying path and including a pair of correction rollers rotatable to convey the paper and a baffle arranged adjacent to the pair of correction rollers, and a control unit configured to determine, according to information of the paper, whether to adopt a first skew correction mode, a second skew correction mode or a third skew correction mode, wherein in the first skew correction mode, the pair of correction rollers are stopped to prevent the paper from being conveyed so that a leading end of the paper is aligned, in the second skew correction mode, the baffle prevents the paper from being conveyed so that the leading end of the paper is aligned, and in the third skew correction mode, the pair of correction rollers and the baffle prevent the paper from being conveyed so that the leading end of the paper is aligned.

Description

Technical Field

[0001] This invention relates to the field of printing technology, and more specifically to a paper conveying device and an image forming apparatus including the paper conveying device. Background Technology

[0002] In existing paper conveying devices, inclined paper is tilted and corrected at a pre-correction roller. Thin paper, with its lower rigidity, easily stops at the correction roller and forms a loop, facilitating tilt correction and providing strong correction capability. However, thick paper, with its higher rigidity, easily passes through the pressing point of the correction roller, resulting in ineffective tilt correction. Even increasing the amount of bending does not improve the tilt correction effect. Therefore, thick paper exhibits weak tilt correction capability. Summary of the Invention

[0003] Embodiments of the present invention provide a paper conveying device and an image forming device, which solve the problem of weak tilt correction capability of thick paper in the prior art.

[0004] According to a first aspect of the present invention, a paper conveying device is provided. The paper conveying device includes: a paper feeding unit for conveying paper to a paper conveying path; a conveying unit for conveying the paper along the paper conveying path; a tilt correction unit located in the paper conveying path, the tilt correction unit including a pair of correction rollers and a baffle arranged adjacent to the pair of correction rollers, the pair of correction rollers being rotatable to convey the paper; and a control unit configured to: determine, based on information about the paper, whether to adopt a first tilt correction mode, a second tilt correction mode, or a third tilt correction mode.

[0005] In the first tilt correction mode, the correction rollers stop rotating to prevent the paper from being fed, thereby aligning the tips of the paper; in the second tilt correction mode, the baffle prevents the paper from being fed, thereby aligning the tips of the paper; in the third tilt correction mode, the correction rollers, together with the baffle, prevent the paper from being fed, thereby aligning the tips of the paper.

[0006] Optionally, the information of the paper includes the paper's floor area and / or stiffness. When the paper's floor area and / or stiffness is less than a predetermined value, the control unit adopts the first tilt correction mode; when the paper's floor area and / or stiffness is greater than or equal to the predetermined value, the control unit adopts the second tilt correction mode or the third tilt correction mode.

[0007] Optionally, the baffle is located in the clamping portion between the pair of corrective rollers, and the baffle has an intercepting position that intersects with the paper conveying path and an avoidance position that does not intersect with the paper conveying path.

[0008] Optionally, the baffle is located upstream of the corrective roller pair along the paper transport path, and the baffle has an intercepting position that intersects the paper transport path and an avoidance position that does not intersect the paper transport path.

[0009] Optionally, the baffle is located above or below the pair of correcting rollers. The baffle has a pressure-applying position for applying pressure to the pair of correcting rollers and a release position separate from the pair of correcting rollers. When in the pressure-applying position, the baffle applies pressure to the pair of correcting rollers to prevent the paper from being fed, thereby aligning the tips of the paper.

[0010] Optionally, the baffle is located upstream of the correction roller pair along the paper conveying path, and the baffle is made of a flexible material; the conveying unit also includes a conveying guide rail located in the conveying path, and the baffle can contact the conveying guide rail so that the paper is conveyed between the baffle and the conveying guide rail.

[0011] Optionally, the control unit further includes: a storage unit for storing paper information, the control unit being configured to set correction parameters for different correction modes based on the stored paper information; and / or an input unit for adding paper information, the control unit being configured to set correction parameters for different correction modes based on the added paper information.

[0012] Optionally, the control unit further includes an image detection unit for detecting the image content, and the control unit is further configured to determine the tilt correction result based on the detected image content, and to adjust the correction parameters in real time based on the determination result.

[0013] Optionally, the paper feeding unit includes: a paper feeding box for storing a stack of paper consisting of multiple sheets of paper; multiple fans for blowing air into the paper stack in the paper feeding box to make the paper float; and a conveyor belt located above the paper stack for conveying the floated paper; wherein the multiple fans include: a front fan located on the front side of the paper stack along the paper conveying direction, capable of switching the airflow direction between the paper floating direction and the paper separation direction; at least two side fans located on both sides of the paper stack respectively for making the paper float; and a suction fan located above the paper stack for adsorbing the floated paper onto the conveyor belt.

[0014] According to another aspect of the present invention, an image forming apparatus is also provided. The image forming apparatus includes a paper conveying device for conveying paper; and an image forming mechanism for forming an image on the paper.

[0015] Compared with the prior art, the technical solution of the embodiments of the present invention has the following beneficial effects:

[0016] According to an embodiment of the present invention, the control unit is configured to: determine, based on information about the paper, to adopt a first tilt correction mode, a second tilt correction mode, or a third tilt correction mode, wherein, in the first tilt correction mode, the correction rollers stop rotating to prevent the paper from being fed, thereby aligning the tips of the paper; in the second tilt correction mode, the baffle prevents the paper from being fed, thereby aligning the tips of the paper; and in the third tilt correction mode, the correction rollers, together with the baffle, prevent the paper from being fed, thereby aligning the tips of the paper. By employing appropriate tilt correction modes for different types of paper, the problem of thin paper tip damage or thick paper failing to tilt during correction is avoided.

[0017] Furthermore, the paper information includes the paper's sheet weight and / or stiffness. When the paper's sheet weight and / or stiffness is less than a predetermined value, the control unit employs the first tilt correction mode; when the paper's sheet weight and / or stiffness is greater than or equal to the predetermined value, the control unit employs the second tilt correction mode or the third tilt correction mode. Selecting a suitable tilt correction mode based on the paper information effectively improves the tilt correction capability for various types of paper and avoids side effects such as poor image quality and tip scratches caused by differences in paper characteristics. Attached Figure Description

[0018] Other features and advantages of the invention will be better understood through the following detailed description of alternative embodiments in conjunction with the accompanying drawings, in which the same reference numerals denote the same or similar parts, wherein:

[0019] Figure 1 A schematic diagram of a paper conveying device according to an embodiment of the present invention is shown;

[0020] Figure 2 A schematic diagram of a paper conveying device according to another embodiment of the present invention is shown;

[0021] Figure 3 A schematic diagram of a paper conveying device according to another embodiment of the present invention is shown;

[0022] Figure 4 A schematic diagram of a paper conveying device according to yet another embodiment of the present invention is shown;

[0023] Figure 5 A schematic diagram of an image forming apparatus according to an embodiment of the present invention is shown. Detailed Implementation

[0024] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely illustrative of particular ways of implementing and using the invention, and are not intended to limit the scope of the invention. The descriptions of the structural positions of the various components, such as upper, lower, top, bottom, etc., are not absolute but relative. These directional descriptions are appropriate when the various components are arranged as shown in the figures, but they change accordingly when the positions of the components in the figures change.

[0025] As described in the background section, thick paper has high rigidity and is prone to passing through the pressing point of the correction roller, causing the skewed paper to be unable to be effectively corrected. Even increasing the amount of bending cannot improve the skew correction effect. Therefore, thick paper has a weak skew correction capability.

[0026] Therefore, according to an embodiment of the present invention, a paper conveying device is provided. The paper conveying device includes: a paper feeding unit for conveying paper to a paper conveying path; a conveying unit for conveying the paper along the paper conveying path; a tilt correction unit located in the paper conveying path, the tilt correction unit including a pair of correction rollers and a baffle arranged adjacent to the pair of correction rollers, the pair of correction rollers being rotatable to convey the paper; and a control unit configured to: determine, based on information about the paper, whether to adopt a first tilt correction mode, a second tilt correction mode, or a third tilt correction mode.

[0027] In the first tilt correction mode, the correction roller pair stops rotating to prevent the paper from being fed, and the tip of the paper stops and bends when it reaches the correction roller pair, so that the tip of the paper is aligned; in the second tilt correction mode, the baffle prevents the paper from being fed, and the tip of the paper stops and bends when it reaches the baffle, so that the tip of the paper is aligned; in the third tilt correction mode, the correction roller pair together with the baffle prevents the paper from being fed, and the tip of the paper stops and bends, so that the tip of the paper is aligned.

[0028] By employing appropriate tilt correction modes for different types of paper, problems such as scratches on the tip of thin paper or the inability to tilt and correct thick paper due to passing through the correction position can be avoided during correction.

[0029] Figure 1 A schematic diagram of a paper conveying device 100 according to an embodiment of the present invention is shown. Figure 1 As shown, specifically, the paper conveying device 100 includes a paper feeding unit 10, a conveying unit 20, and a tilt correction unit 30.

[0030] The paper feeding unit 10 includes a paper tray 11, multiple fans 12, and a conveyor belt 13. The paper tray 11 holds a stack 40 of multiple sheets of paper 41. The fans 12 blow air into the stack 40 in the paper tray 11 to levitate the sheets of paper 41. The conveyor belt 13, driven by a motor, rotates to transport the topmost sheet of paper 41 that has been lifted onto the stack. The conveyor unit 20 continues to transport the paper 41 from the conveyor belt 30 to the downstream image forming mechanism. The conveyor unit 20 may include multiple pairs of conveyor rollers for transporting the paper along a paper transport path.

[0031] The plurality of fans 12 includes a front fan 121, a suction fan 122, and at least two side fans 123. The front fan 121 is located at the front of the paper stack 40 along the paper conveying direction and can switch between the paper blowing direction and the paper separation direction. The at least two side fans 123 are located on both sides of the paper stack 40, for example, two side fans 123 are provided on each side of the paper stack 40, for making the paper float. The suction fan 122 is located above the paper stack 40, for example, it can be set above the conveyor belt 13, and suctions the topmost paper 41 of several sheets of paper onto the conveyor belt 13 through holes in the belt.

[0032] When the tip fan 121 is in the paper blowing direction, it works in conjunction with at least two side fans 123 to blow air into the paper stack 40, thereby blowing several sheets of paper at the top of the stack 40 in the paper tray 11. The suction fan 122 then draws the blown-up sheets of paper onto the conveyor belt 13. When the tip fan 121 is in the paper separating direction, it blows air under the top sheet of the blown-up sheets of paper, separating the top sheet 41 from the other sheets. The conveyor belt 13 then transports the top sheet of paper to the conveyor unit 20.

[0033] In some embodiments, the paper feeding unit 10 further includes a suction sensor 14, which is disposed near the conveyor belt 13. When the suction sensor 14 is in the "on" state, it indicates that the paper is in contact with the conveyor belt 13; when the suction sensor 14 is in the "off" state, it indicates that the paper is separated from the conveyor belt 13.

[0034] The tilt correction unit 30 is located in the paper conveying path. The tilt correction unit 30 includes a pair of correction rollers 31 and a baffle 32 arranged adjacent to the pair of correction rollers 31. The pair of correction rollers 31 can rotate to convey the paper. During conveying, the tip (or front end) of the paper will tilt. When the paper reaches the pair of correction rollers 31, the pair of correction rollers 31 does not rotate, and the tip of the paper will bend or arch, so that the tip of the paper is aligned. Then the pair of correction rollers 31 starts to rotate and continues to convey the paper along the paper conveying path.

[0035] The paper feeding device 100 also includes a control unit (not shown), which is configured to determine, based on information about the paper, whether to adopt a first tilt correction mode, a second tilt correction mode, or a third tilt correction mode.

[0036] In the first tilt correction mode, the correction roller pair 31 stops rotating to prevent the paper from being fed, and the tip of the paper stops and bends when it reaches the correction roller pair 31, so that the tip of the paper is aligned; in the second tilt correction mode, the baffle 32 prevents the paper from being fed, and the tip of the paper stops and bends when it reaches the baffle 32, so that the tip of the paper is aligned; in the third tilt correction mode, the correction roller pair 31 together with the baffle 32 prevents the paper from being fed, and the tip of the paper stops and bends, so that the tip of the paper is aligned.

[0037] In some embodiments, the paper information includes the paper's sheet weight and / or stiffness. When the paper's sheet weight and / or stiffness is less than a predetermined value, the control unit employs the first tilt correction mode; when the paper's sheet weight and / or stiffness is greater than or equal to the predetermined value, the control unit employs the second tilt correction mode or the third tilt correction mode. In some embodiments, the sheet weight and stiffness parameters of various types of paper can be predetermined, or the sheet weight and stiffness parameters of each sheet can be measured instantaneously using a measuring device.

[0038] Paper weight per square meter refers to the weight of paper per square meter of area, usually expressed in g / m². 2 As a unit. For example, when the paper's sheet weight is <300g / m² 2 When the control unit adopts the first tilt correction mode, the control unit controls the correction roller pair 31 to stop rotating to prevent the paper from being transported. When the tip of the paper reaches the correction roller pair 31, it stops and bends, so that the tip of the paper is aligned.

[0039] When the paper's surface area is ≥300g / m² 2 In the second tilt correction mode, the control unit controls the baffle 32 to stop the paper from being fed, and the paper stops and bends when it reaches the baffle 32, so that the paper tip is aligned. Alternatively, the control unit uses the third tilt correction mode, in which the control unit controls the correction roller pair 31 to stop rotating and controls the baffle 32 to stop the paper from being fed, and the paper tip stops and bends, so that the paper tip is aligned.

[0040] Paper stiffness refers to the force required to bend paper at a specified angle, usually expressed in mN·m. For example, when the stiffness of the paper is <700 mN·m, the control unit adopts a first tilt correction mode, that is, the control unit controls the correction roller pair 31 to stop rotating to prevent the paper from being transported. When the tip of the paper reaches the correction roller pair 31, it stops and bends, so that the tip of the paper is aligned.

[0041] When the stiffness of the paper is ≥700mN·m, the control unit adopts the second tilt correction mode, that is, the control unit controls the baffle 32 to stop the paper from being fed, and the tip of the paper stops and bends when it reaches the baffle 32, so that the tip of the paper is aligned. Alternatively, the control unit adopts the third tilt correction mode, the control unit controls the correction roller pair 31 to stop rotating, and controls the baffle 32 to stop the paper from being fed, and the tip of the paper stops and bends, so that the tip of the paper is aligned.

[0042] Therefore, selecting the appropriate tilt correction mode based on the paper information can effectively improve the tilt correction capability of various papers and avoid side effects such as poor image quality and tip scratches caused by different paper characteristics.

[0043] like Figure 1 As shown, in some embodiments, a baffle 32 is located in the clamping portion between the corrective roller pairs 31. The baffle 32 has an intercepting position that intersects the paper transport path and an avoidance position that does not intersect the paper transport path. For example, the corrective roller pairs 31 include two pairs of corrective rollers arranged at a certain distance, and the baffle 32 is rotatably mounted on the frame of the paper transport device, located between the two pairs of corrective rollers, on the line connecting the clamping portions of the two pairs of corrective rollers. Figure 1 In this configuration, the clamping section is connected along a direction perpendicular to the paper. A baffle 32 is rotatably mounted on the frame of the paper conveying device. The control unit can control the baffle 32 to rotate, thereby switching between an intercepting position and an avoidance position. In the second tilt correction mode or the third correction mode, the control unit controls the baffle 32 to rotate to the intercepting position shown in the figure, preventing paper conveying and aligning the paper's tip. Once the paper's tip is aligned, the control unit then controls the baffle 32 to rotate to the avoidance position, and the paper continues to be conveyed. In other embodiments, the baffle 32 is retractably arranged on the lower roller of the correction roller pair 31, and the control unit can control the baffle 32 to extend to the intercepting position or retract to the avoidance position.

[0044] By arranging the baffle 32 in the clamping part between the correcting roller pair 31, the paper tip is effectively prevented from passing through the biting point of the roller pair. For paper that is prone to scratches, it first contacts the roller pair to absorb some energy and then contacts the baffle, thus avoiding tip scratches.

[0045] like Figure 2 As shown, in some embodiments, the baffle 32 is located upstream of the corrective roller pair 31 along the paper conveying path. Figure 1 The embodiment shown is the same, with baffle 32 having an interception position that intersects the paper conveying path and an avoidance position that does not intersect the paper conveying path.

[0046] By arranging the baffle 32 upstream of the correcting roller pair 31 along the paper conveying path, the baffle 32 is positioned between the correcting roller pair 31 and the conveyor belt 13, enabling it to perform correction before the conveyor belt 13 reaches its maximum speed. This avoids the loss of conveying time caused by the conveyor belt 13 needing to decelerate and stop before restarting due to correction, thereby improving production efficiency.

[0047] like Figure 3 As shown, in some embodiments, the baffle 32 is located above or below the correction roller pair 31. The baffle 32 has a pressing position for applying pressure to the correction roller pair 31 and a releasing position separate from the correction roller pair 31. As shown, the baffle 32 is located above the correction roller pair 31. When in the pressing position, the baffle 32 applies pressure to the correction roller pair 31 to prevent paper feeding. The paper stops and bends when it reaches the correction roller pair 31, thus aligning the paper tips. In the illustrated embodiment, the baffle 32 can move up and down, and has pressing and pressure release functions. The correction mode of the baffle and roller pair combination is achieved by increasing the pressure of the clamping portion of the correction roller pair 31.

[0048] exist Figure 3 In the illustrated embodiment, the baffle 32 does not directly contact the paper but acts on the correction roller pair 31 for tilt correction. Before the tip of the paper protrudes into the correction roller pair 31, the baffle 32 applies pressure to the correction roller pair 31, thereby generating sufficient force between the correction roller pair 31 to resist the impact of the paper, stopping the paper at the engagement point of the correction roller pair 31, thus effectively correcting the paper tilt. After tilt correction, the baffle 32 releases the applied pressure to prevent excessive load on the correction roller pair 31 during rotation, which could cause motor derailment. By applying pressure during paper impact and reducing pressure during conveying, the impact force at the tip of the paper can be resisted, improving the tilt correction capability, without increasing the motor load, resulting in fewer side effects.

[0049] like Figure 4As shown, in some embodiments, the baffle 32 is located upstream of the corrective roller pair 31 along the paper conveying path, and the baffle 32 is made of a flexible material. The conveying unit 20 also includes a conveying guide 21 located in the conveying path, and the baffle 32 can contact the conveying guide 21 so that the paper is conveyed between the baffle 32 and the conveying guide 21.

[0050] The baffle 32 has an intercepting position that contacts the conveying guide 21 and an avoidance position that separates it from the conveying guide 21. In the intercepting position, the baffle 32 contacts the conveying guide 21, and the paper is conveyed between the baffle 32 and the conveying guide 21. Before the paper arrives, the baffle 32 presses against the conveying guide 21, generating pressure. When impacted by the paper, it absorbs some energy, reducing the energy of the paper tip impacting the correction roller pair 31, thus preventing the paper tip from protruding into the engagement point of the correction roller pair 31. After tilt correction, the baffle 32 leaves the intercepting position, avoiding the paper conveying path, and the paper continues to be conveyed downstream.

[0051] In some embodiments, the control unit further includes: a storage unit for storing paper information, the control unit being configured to automatically set correction parameters for different correction modes based on the stored paper information; and / or an input unit for adding paper information, the control unit being configured to automatically set correction parameters for different correction modes based on the added paper information.

[0052] In some embodiments, the paper information also includes the paper size, such as the paper length, and selects an appropriate tilt correction mode and correction parameters based on a combination of paper size and floor area or a combination of size and stiffness to adjust the resistance or pressure of the baffle 32.

[0053] When the paper weight is <300g / m² 2 When the paper thickness is ≥300g / m², the baffle 32 is in the avoidance position, and the pressure or resistance of the baffle is 0; 2 At that time, baffle 32 is in the interception position.

[0054] When the paper weight is ≥300g / m² 2 And less than 400g / m 2 For paper lengths below 297mm, 298-420mm, and 421-550mm, the baffle pressure or resistance is 50% of the standard pressure; for paper lengths above 551-700mm and 701mm, the baffle pressure or resistance is 75% of the standard pressure or resistance. The standard paper used in sample books is generally 80g / m². 2 The standard paper uses the pressure or resistance pattern value as the magnitude of the pressure or resistance that is usually used.

[0055] When the paper weight is ≥400g / m²2 When the pressure is less than 600 g / m2, for paper with a length of less than 297 mm, 298–420 mm, or 421–550 mm, the pressure or resistance of the baffle is 75% of the standard pressure; for paper with a length of 551–700 mm or more than 701 mm, the pressure or resistance of the baffle is 100% of the standard pressure or resistance.

[0056] When the paper weight is ≥600g / m² 2 For paper with a length of less than 297 mm, the pressure or resistance of the baffle is 100% of the standard pressure; for paper with a length of 298–420 mm or 421–550 mm, the pressure or resistance of the baffle is 125% of the standard pressure; for paper with a length of 551–700 mm or more than 701 mm, the pressure or resistance of the baffle is 150% of the standard pressure.

[0057] Therefore, the control unit can determine the appropriate tilt correction mode based on the paper information stored within the unit, automatically set and adjust the appropriate resistance or pressure according to parameters such as paper thickness and stiffness, and can add settings for commonly used paper types and corresponding tilt correction methods and parameters based on environmental changes. By adjusting the optimal correction parameters in advance based on the paper information, the correction capability is improved and side effects are avoided.

[0058] In some embodiments, the paper conveying device further includes an image detection unit for detecting the image content, and the control unit is further configured to: determine the tilt correction result based on the detected image content, and adjust the correction parameters in real time based on the determination result.

[0059] For example, when a tilt is detected in the image content, if the first tilt correction mode is used, it is changed to the second tilt correction mode; if the second tilt correction mode is used, it is changed to the third tilt correction mode; when a tip injury is detected, if the second tilt correction mode is used, it is changed to the first or third tilt correction mode.

[0060] In this embodiment, the pressure or resistance of the baffle is adjusted in real time based on the tilt result of the image content detected after imaging. For example, the corrected paper undergoes tilt detection in the image detection unit, the result is fed back, and the correction mode is changed according to the result. The correction parameters are fine-tuned to improve the correction capability, thereby avoiding image quality degradation caused by incorrect paper parameter settings and the use of an unreasonable correction mode.

[0061] Figure 5A schematic diagram of an image forming apparatus 200 according to an embodiment of the present invention is shown. This image forming apparatus 200 may be a laminator, including multiple paper feeding devices 100, an image reading unit 210, an operation display unit 220, an image forming mechanism 230, a transport unit 240, etc. The transport unit 240 transports paper from the paper feeding devices 100 to the image forming mechanism 230, forming the image on the paper from the original document read by the image reading unit 210.

[0062] The technical content and features of the present invention have been disclosed above. However, it is understood that those skilled in the art can make various changes and improvements to the disclosed concepts under the inventive concept of the present invention, all of which fall within the protection scope of the present invention. The description of the above embodiments is illustrative rather than restrictive, and the protection scope of the present invention is determined by the claims.

Claims

1. A paper conveying device, characterized in that, include: The paper feeding unit is used to feed paper into the paper transport path; A conveying unit is used to convey the paper along the paper conveying path; A tilt correction unit is located in the paper conveying path. The tilt correction unit includes a pair of correction rollers and a baffle arranged adjacent to the pair of correction rollers. The pair of correction rollers can rotate to convey the paper. as well as The control unit is configured to: Based on the information of the paper, the control unit determines whether to adopt a first tilt correction mode, a second tilt correction mode, or a third tilt correction mode. The information of the paper includes the paper's floor area and / or stiffness. When the paper's floor area and / or stiffness is less than a predetermined value, the control unit adopts the first tilt correction mode; when the paper's floor area and / or stiffness is greater than or equal to the predetermined value, the control unit adopts the second tilt correction mode or the third tilt correction mode. In the first tilt correction mode, the correction rollers stop rotating to prevent the paper from being fed, thereby aligning the tips of the paper; in the second tilt correction mode, the baffle prevents the paper from being fed, thereby aligning the tips of the paper; in the third tilt correction mode, the correction rollers, together with the baffle, prevent the paper from being fed, thereby aligning the tips of the paper.

2. The paper conveying device according to claim 1, characterized in that, The baffle is located in the clamping part between the pair of corrective rollers, and the baffle has an intercepting position that intersects with the paper conveying path and an avoidance position that does not intersect with the paper conveying path.

3. The paper conveying device according to claim 1, characterized in that, The baffle is located upstream of the corrective roller pair along the paper transport path, and the baffle has an intercepting position that intersects the paper transport path and an avoidance position that does not intersect the paper transport path.

4. The paper conveying device according to claim 1, characterized in that, The baffle is located above or below the pair of correction rollers. The baffle has a pressure application position for applying pressure to the pair of correction rollers and a release position for separating from the pair of correction rollers. When in the pressure application position, the baffle applies pressure to the pair of correction rollers to prevent the paper from being fed, thereby aligning the tips of the paper.

5. The paper conveying device according to claim 1, characterized in that, The baffle is located upstream of the correcting roller pair along the paper conveying path, and the baffle is made of a flexible material; The conveying unit also includes a conveying guide rail located in the conveying path, and the baffle can contact the conveying guide rail so that the paper is conveyed between the baffle and the conveying guide rail.

6. The paper conveying device according to any one of claims 1 to 5, characterized in that, The control unit further includes: A storage unit for storing paper information; the control unit is configured to set correction parameters for different correction modes based on the stored paper information; and / or The control unit is configured to set correction parameters for different correction modes based on the added paper information, including an input unit for additional paper information.

7. The paper conveying device according to any one of claims 1 to 5, characterized in that, The control unit further includes: The image detection unit for detecting image content, the control unit is further configured to: determine the tilt correction result based on the detected image content, and adjust the correction parameters in real time based on the determination result.

8. The paper conveying device according to any one of claims 1 to 5, characterized in that, The paper feeding unit includes: A cardboard box is used to store stacks of paper consisting of multiple sheets of paper. Multiple fans are used to blow air onto the stack of paper in the paper tray to make the paper float. A conveyor belt, located above the paper stack, is used to transport the floating paper. The plurality of fans include: The front fan is located in front of the paper stack along the paper conveying direction and can switch the airflow direction between the paper blowing direction and the paper separation direction. At least two side fans, located on opposite sides of the paper stack, are used to levitate the paper. A suction fan, located above the paper stack, is used to draw the floating paper onto the conveyor belt.

9. An image forming apparatus, characterized in that, include: The paper conveying device according to any one of claims 1 to 8 is used for conveying paper; as well as An image forming mechanism for forming an image on the paper.

Images