JP7006362B2 - Paper feed device, image forming device, and image forming system - Google Patents

Description

The present disclosure relates to a paper feed device, an image forming device, and an image forming system.

Conventionally, an air suction type paper feed device is known as a paper feed device that supplies paper to an image forming device such as a copying machine or a printer. Some air suction type paper feed devices include a transport unit that generates a negative pressure above the loaded paper to suck air and suck the uppermost paper. Such an air suction type paper feeding device sends out one sheet of a plurality of loaded sheets by blowing air from the tip or side edge of the sheets to float the sheets in order to attract the sheets to the transport section. be able to.

By the way, if the paper is uneven, the top-level paper and the lower-level paper may be caught in the uneven portion when the paper is sent out. In this case, the paper cannot be fed properly, so by changing the position of the air to be blown according to the unevenness of the paper, the top-level paper and the lower-level paper can be eliminated and the paper can be fed properly. It has been proposed (see, for example, Patent Document 1). It has also been proposed that a vibrating member provided at the rear end of the paper vibrates the paper in the paper feeding direction to shift the position of the upper paper and the position of the lower paper to prevent the feed. For example, see Patent Document 2).

Japanese Unexamined Patent Publication No. 2015-174740 Japanese Unexamined Patent Publication No. 2011-042467

However, even with the conventional technique as described in Patent Document 1, if the unevenness formed on the paper is regular over the entire surface of the paper, the top-level paper and the lower-level paper may be caught. It may not be resolved. Further, even in the conventional technique as described in Patent Document 2, if the unevenness formed on the paper is regular over the entire surface of the paper as described above, the phase between the upper side and the lower side is adjusted by the vibrating member. Even if the paper is shifted, the paper will be caught in a different phase, which may cause feeding.

The present disclosure has been made in view of such a situation, and is intended to prevent the occurrence of paper feed even when paper having regular irregularities is loaded.

The paper feed device according to the first aspect of the present disclosure includes a mounting table on which a plurality of sheets are placed, a suction unit that sucks the plurality of sheets mounted on the above-mentioned table in order from the top, and the above-mentioned. It is provided with a paper feed transport unit that conveys the paper sucked by the suction unit, and a posture change unit that changes the posture of the paper conveyed by the paper feed transport unit from the start of floating of the paper to the start of paper transport. The posture changing unit relatives the orientation of the top-level paper to the paper transport direction and the orientation of the top-level next paper to the paper transport direction among the plurality of sheets placed on the above-mentioned table. Make it different.

Further, the posture changing portion is the orientation of the top-level paper placed on the above-mentioned table with respect to the paper transport direction and the top position of the top-level paper sucked by the suction unit. It is preferable to change the posture of the paper on the paper surface so that the orientation of the paper with respect to the paper transport direction is different.

Further, a side edge restricting portion arranged along the paper transport direction and restricting the side edge of the paper and a guide member extending to the upper end of the side edge restricting portion are further provided, and the guide member is provided with the guide member. It abuts on the side edge of the paper, and it is preferable that the posture changing portion includes the guide member and the guide member changes the direction of the paper with respect to the paper transport direction .

Further, a first side end air portion that is arranged on either side of the paper along the paper transport direction and blows air to the side edge of the paper, and both ends of the paper along the paper transport direction. A second side end air portion, which is arranged on the other side of the paper and blows air to the side edge of the paper, is further provided, and the posture changing portion includes the first side end air portion and the second side end. The wind direction of the first side air including the air portion and blown from the first side end air portion is reversed from the wind direction of the second side air blown from the second side end air portion. Moreover, it is preferable to make the action line of the first side air and the action line of the second side air inconsistent.

Further, the paper feed transport unit includes a first belt member arranged along a paper width direction orthogonal to the paper transport direction, and a second belt member arranged on at least one of both ends of the first belt member. The posture changing portion includes the first belt member and the second belt member, and the inclination correction amounts of the first belt member and the second belt member are different. It is preferable to let it.

Further, it is preferable that the posture changing unit shifts the direction of the highest-ranked paper with respect to the paper transport direction from the paper transport direction among the plurality of sheets placed on the above-mentioned table.

Further, it is preferable that the plurality of sheets of paper placed on the above-mentioned table are aligned in an upright direction with respect to the paper transport direction.

Further, it is preferable that the posture changing unit makes the direction of the highest-ranked paper among the plurality of sheets placed on the above-mentioned table stand upright with the paper transport direction.

Further, it is preferable that the plurality of sheets of paper placed on the above-mentioned table are arranged in a direction inclined from the paper transport direction.

Further, the posture changing unit is the top or lower paper when the top paper among the plurality of sheets placed on the above-mentioned table is attracted to the paper feed transport unit by the suction of the suction unit. It is preferable to shift the orientation of the paper with respect to the paper transport direction .

Further, the guide member includes a hinge mechanism capable of adjusting an inclination angle from the upper end of the side end restricting portion about a rotation axis along the paper transport direction, and the posture changing portion is a pedestal described above. Of the plurality of sheets placed on the paper, it is preferable that the direction of the top-level or lower paper with respect to the paper transport direction is changed by the hinge mechanism.

Further, it is preferable that the guide member is arranged on the upstream side in the paper transport direction with respect to the paper feed transport section.

Further, a side edge restricting portion, which is arranged along the paper transport direction and regulates the side edge of the paper, is further provided. It is preferable that the paper is arranged on the downstream side of the paper and is shorter than the paper feed transport unit in the paper transport direction.

Further, the posture changing unit is at least next to the top paper and the top paper according to at least one of the paper type, the basis weight, and the uneven pattern of the plurality of sheets of paper placed on the above-mentioned table. It is preferable to change the phase with the paper.

Further, it is provided in the tip air section that blows air to the tips of a plurality of sheets of paper placed on the above-mentioned table and the flow path of the tip air blown from the tip air section to open and close the flow path of the tip air. It is preferable to further include a flexible shutter and a control unit for controlling the open / closed state of the shutter.

Further, the image forming apparatus according to the second aspect of the present disclosure includes a mounting table on which a plurality of sheets are placed, and a suction unit that sucks the plurality of sheets placed on the above-mentioned table in order from the top. A paper feed transport unit that conveys the paper sucked by the suction unit, and a posture change unit that changes the posture of the paper conveyed by the paper feed transport unit from the start of floating of the paper to the start of paper transport . In preparation, the posture changing unit determines the orientation of the top-level paper with respect to the paper transport direction and the orientation of the top-level next paper with respect to the paper transport direction among the plurality of sheets placed on the above-mentioned table. Make them relatively different.

Further, the image forming system, which is the third aspect of the present disclosure, has a suction unit that sucks a plurality of sheets of paper placed on the above-mentioned table in order from the top, and a supply unit that conveys the paper sucked by the suction unit. A paper transport unit and a posture change unit that changes the posture of the paper transported by the paper feed transport unit from the start of floating of the paper to the start of paper transport are provided, and the posture change unit is mounted on the above-mentioned table. Of the plurality of placed sheets, the orientation of the top-level paper with respect to the paper transport direction and the orientation of the top-level next sheet with respect to the paper transport direction are relatively different.

According to the first, second, and third aspects of the present disclosure, it is possible to prevent the occurrence of paper feed even when the paper having regular irregularities is loaded.

It is a figure which shows the whole structure example of the image formation system 1 in Embodiment 1 of this disclosure. It is a figure which shows an example of the main part structure of the paper feed device 2 in Embodiment 1 of this disclosure. It is a figure which shows an example of the control system of the paper feed device 2 in Embodiment 1 of this disclosure. It is a figure which shows an example of various sensors which detect paper P in Embodiment 1 of this disclosure. It is a figure which shows an example which looked at the side edge regulation part 72 in Embodiment 1 of this disclosure from the rear edge of a paper. It is a figure which shows an example which looked at the side edge regulation part 72 in Embodiment 1 of this disclosure from the upper side of a paper. It is a figure which concretely shows an example of various air blown to the tip of a paper in Embodiment 1 of this disclosure. It is a figure which shows an example which the paper P placed on the mounting table 71 in Embodiment 1 of this disclosure is aligned in the upright direction with respect to the paper transport direction. It is a figure which shows an example which the paper P placed on the mounting table 71 in Embodiment 1 of this disclosure is aligned in the direction which is tilted from the paper transport direction. It is a figure which shows an example which shifts the lower paper P from the paper transport direction at the time of adsorbing the uppermost paper P in Embodiment 1 of this disclosure. It is a flowchart explaining the control example of the paper feed device 2 in Embodiment 1 of this disclosure. It is a figure which shows an example which is the embossed paper in Embodiment 1 of this disclosure. It is a figure which shows an example which looked at the position which blows a side air in Embodiment 2 of this disclosure from the upper side of a paper. It is a figure which shows an example of the control system of the paper feed device 2 in Embodiment 2 of this disclosure. It is a flowchart explaining the control example of the paper feed device 2 in Embodiment 2 of this disclosure. It is a figure which shows an example which looked at the paper feed transfer part 73_1, 73_2 in Embodiment 3 of this disclosure from the upper side of a paper. It is a figure which shows an example of the control system of the paper feed device 2 in Embodiment 3 of this disclosure. It is a flowchart explaining the control example of the paper feed device 2 in Embodiment 3 of this disclosure. It is a figure which shows an example of feeding embossed paper by the conventional paper feed unit 2000.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the following embodiments.

FIG. 1 is a diagram showing an overall configuration example of the image forming system 1 according to the first embodiment of the present disclosure. As shown in FIG. 1, the image forming system 1 has a configuration in which an external large-capacity paper feeding device 2 is connected to the side of the image forming apparatus 3. The paper feeding device 2 is provided with three-stage paper feeding units 201A, 201B, 201C inside, and papers P are fed to the image forming apparatus 3 one by one. The paper feeding device 2 includes a control unit 200. The control unit 200 includes a CPU, a ROM, a RAM, a storage unit, and the like. The storage unit is realized by a non-volatile semiconductor memory such as a flash memory or a hard disk drive, and various data are stored. The control unit 200 cooperates with the control unit 100 of the image forming apparatus 3 to control the operation of each unit of the paper feeding device 2. The control unit 200 controls the paper feed transfer unit 73, the suction unit 74, the transfer path unit 75, and the like based on the control signal and the like from the image forming apparatus 3. The details of the paper feed device 2 will be described later. The control unit 200 may be configured as a hardware processor whose storage unit is a semiconductor memory.

The image forming apparatus 3 is an apparatus for forming a color image of an intermediate transfer method using an electrophotographic process technique. The image forming apparatus 3 is a vertical tandem in which photosensitive drums corresponding to the four colors of YMCK are arranged in series in the traveling direction of the intermediate transfer belt, that is, in the vertical direction, and the toner images of each color are sequentially transferred to the intermediate transfer belt in one procedure. The method is adopted. That is, the image forming apparatus 3 primary transfers the Y (yellow), M (magenta), C (cyan), and K (black) color toner images formed on the photosensitive drum to the intermediate transfer belt, and the intermediate transfer belt. After superimposing the toner images of the four colors on the paper P or the paper S, the image is formed by secondary transfer.

The image forming apparatus 3 includes an image reading unit 10, an operation display unit 20, an image processing unit 30, an image forming unit 40, a paper transport unit 50, a fixing unit 60, and a control unit 100. The control unit 100 includes a CPU, a ROM, a RAM, a storage unit, and the like. The CPU reads a program from the ROM according to the processing content, expands it into the RAM, and controls the operation of each part of the image forming apparatus 3 in cooperation with the expanded program. The storage unit is realized by a non-volatile semiconductor memory such as a flash memory or a hard disk drive, and various data are stored. Various data stored in the storage unit are referred to when the CPU controls the operation of the image forming apparatus 3. Further, the control unit 100 controls the operation of the paper feed device 2 in cooperation with the control unit 200 of the paper feed device 2. The control unit 100 may be configured as a hardware processor whose storage unit is a semiconductor memory.

The image reading unit 10 includes an automatic document feeding device 11, a document image scanning device 12, and the like. The automatic document feeder 11 is referred to as an ADF (Auto Document Feeder). The automatic document feeder 11 conveys the documents placed on the document tray by the conveying mechanism and sends them out to the document image scanning device 12. The automatic document feeder 11 can continuously read images of a large number of documents placed on the document tray. When the automatic document feeder 11 continuously reads images of a large number of documents, the automatic document feeder 11 can read both sides of each document by the paper reversing mechanism. The document image scanning device 12 optically scans the document conveyed on the contact glass from the automatic document feeder 11 or the document placed on the contact glass. The document image scanning device 12 reads the document image formed on the document by forming an image of the reflected light from the document by optical scanning on the light receiving surface of the CCD sensor. The image reading unit 10 generates input image data of the original image based on the scanning result by the original image scanning device 12. The input image data is supplied to the image processing unit 30, and the image processing unit 30 executes preset image processing.

The operation display unit 20 is realized by, for example, a liquid crystal display (LCD: Liquid Crystal Display) with a touch panel, and functions as the display unit 21 and the operation unit 22. The display unit 21 displays various operation screens, image states, operation statuses of each function, and the like according to display control signals input from the control unit 100. The operation unit 22 includes various operation keys such as a numeric keypad and a start key. The operation unit 22 generates an operation signal by receiving various input operations by the user. The operation signal is output to the control unit 100.

The image processing unit 30 includes a circuit that performs digital image processing according to initial settings or user settings on the input image data. For example, under the control of the control unit 100, the image processing unit 30 performs gradation correction on the input image data based on the gradation correction table in which the gradation correction data is set. In addition to the gradation correction, the image processing unit 30 performs various correction processing such as color correction and shading correction, compression processing, and the like on the input image data. The image forming unit 40 performs various processes based on the input image data obtained by such various digital image processes. The image forming unit 40 forms an image with the colored toners of the Y component, the M component, the C component, and the K component based on the input image data. The image forming unit 40 includes a photosensitive drum, a charging device, an exposure device, a developing device, and an intermediate transfer device. The surface of the photosensitive drum is uniformly charged by the corona discharge of the charging device. When the exposure apparatus irradiates the photosensitive drum with a laser beam corresponding to the image of each color component, an electrostatic latent image of each color component is formed on the surface of the photosensitive drum. When the developing device supplies the toner of each color component to the surface of the photosensitive drum, the electrostatic latent image is visualized and the toner image is formed. The toner image is transferred to the paper P or the paper S by the intermediate transfer device.

The fixing unit 60 fixes the toner image on the paper P or the paper S by heating and pressurizing the toner image transferred to the paper P or the paper S. The paper transport unit 50 includes a paper feed unit 51, a paper discharge unit 52, a transport path unit 53, and the like. The paper feed unit 51 is accommodated for each type preset based on the basis weight, size, and the like of the paper S. The transport path unit 53 conveys the paper P to be fed from the paper feed device 2, the paper S housed in the paper feed unit 51, or the paper P or the paper S having an image formed on either the front or the back. .. The paper ejection unit 52 ejects the paper P or the paper S on which the image is formed to the outside of the machine.

The paper feed device 2 includes a side end regulation unit 72, a paper feed transport unit 73, a suction unit 74, and a tip regulation unit 78 in each of the paper feed units 201A to 201C, and the paper P is provided for each sheet. Separate and discharge. The paper P discharged from the paper feeding units 201A to 201C is conveyed to the image forming apparatus 3. When any one of the paper feed units 201A to 201C is not particularly limited, it is referred to as a paper feed unit 201. A suction unit 74 is arranged above each of the paper feed unit 201. Side end restricting portions 72 are arranged on both side surfaces of the paper feeding unit 201. A mounting table 71 is arranged between the side end regulating portions 72. A plurality of sheets of paper P can be placed on the mounting table 71. Therefore, each of the paired side edge restricting portions 72 facing each other aligns the positions of the papers P loaded on the mounting table 71 in the width direction. A tip restricting portion 78 is arranged on the tip side of the paper P loaded on the mounting table 71. The tip regulating unit 78 can control the posture of the paper P by blowing the tip air onto the paper P while aligning the tip side of the paper P among the positions in the length direction of the paper P loaded on the mounting table 71. be. A rear end guide member may be arranged on the rear end side of the paper P loaded on the mounting table 71.

FIG. 2 is a diagram showing an example of a main configuration of the paper feed device 2 according to the first embodiment of the present disclosure. FIG. 3 is a diagram showing an example of a control system of the paper feed device 2 according to the first embodiment of the present disclosure. The tip regulating section 78 includes a tip air section 781 and a tip regulating member 782. The tip restricting member 782 regulates the tip position of the paper P. In one example of FIG. 2, the tip air portion 781 is provided adjacent to the tip regulation member 782, and the tip air blowing destination can be changed by the tip air openings 784A, 784B, 784C. When the tip air openings 784A, 784B, and 784C are generically referred to, they are referred to as the tip air openings 784. Although the details will be described later, the tip regulation unit 78 further includes a shutter 785 and a solenoid 786, and the tip air sprayed on the paper P can be blocked by the shutter 785 and the solenoid 786. The side edge restricting portion 72 is arranged along the paper transport direction, includes a side end air portion 723, and regulates the side edge of the paper P. The side end regulating portion 72 is provided with a side end air opening 721 at a position facing the side surface side of the paper P. The side end restricting portion 72 can blow side air from the side end air portion 723 to the side end of the paper P through the side end air opening 721. In one example of FIG. 2, the side end air portion 723 is housed inside the side end regulating portion 72. Therefore, the side end air portion 723 can blow the side air to the side surface side of the paper P by the side end air opening 721. The side end regulation unit 72 is provided with a side end detection sensor 724, the details of which will be described later. Further, the tip regulation unit 78 and the side end regulation unit 72, together with the mounting table 71, are positioned by the drive motor 915 in either the upright direction with respect to the paper transport direction or the orientation in a state of being tilted from the paper transport direction. It can be changed.

The suction unit 74 is arranged above the mounting table 71, includes a suction chamber 740, a suction air unit 741, a suction detection sensor 742, and a detector 743, and has a plurality of sheets of paper P mounted on the mounting table 71 on top. Suction in order from. The paper feed transport unit 73 includes a belt member 731, a drive roller 733, and a driven roller 734A, 734B, 734C, and transports the paper P sucked by the suction unit 74. Since the driven roller 734C may be provided to form a corrugation on the paper P, it does not have to be configured as a set with all the belt members 731. In addition, when a part or all of the driven roller 734A, 734B, 734C is generically referred to, it is referred to as a driven roller 734. The belt member 731 is composed of, for example, an endless belt, is maintained at a constant tension by a driving roller 733 and a driven roller 734, and is provided with a plurality of holes 732. The hole 732 is a through hole. The drive roller 733 is rotationally driven. The driven roller 734 is driven by the belt member 731 that rotates with the rotational drive of the drive roller 733. At least a part of the suction chamber 740 is provided on the inner peripheral side of the belt member 731. The suction air unit 741 is provided on the side surface side of the suction chamber 740, and a negative pressure is applied to the suction unit 74 by generating a negative pressure in the suction unit 74 by the suction air generated by sucking the air in the suction chamber 740. .. Therefore, the belt member 731 sucks and conveys the paper P to which the negative pressure is applied by the suction unit 74 by using the hole 732. The drive roller 733 controls the transfer of the paper P by the belt member 731.

The suction unit 74 sucks the paper P floated by the tip air blown from the tip air portion 781 and the side air blown from the side end air portion 723 in order from the top. The suction unit 74 separates, for example, the first sheet P of the sheets P placed on the mounting table 71. The suction unit 74 conveys the separated first sheet P to the transfer path unit 75 shown in FIG. The transport path unit 75 includes a paper feed detection sensor 751, a transport roller 752, a driven roller 753, a transport guide 754, and transport rollers R11 to R15. The paper feed detection sensor 751 is realized by, for example, a photo sensor including a light receiving unit and a light emitting unit. The position of the paper P is detected by the paper feed detection sensor 751. The paper P is held by the transport roller 752 and the driven roller 753, and the paper P is provided by the transport guide 754 arranged between the upstream side of the transport roller 752 and the downstream side of the suction portion 74 along the paper transport direction. The posture is adjusted, the paper is transported downward along the vertical direction by the transport rollers R11 to R14, and then guided in the direction in which the transport roller R15 is arranged. The transport roller R15 functions as a resist roller that timings the image forming process of the image forming apparatus 3 when the paper P is conveyed to the image forming apparatus 3.

The guide member 91 extends to the upper end of the side edge regulating portion 72 and abuts on at least a part of the side edge of the paper P. The guide member 91 includes a hinge mechanism 911. The hinge mechanism 911 includes a flap 911A, a shaft 911B, and a base 911C. The shaft 911B serves as a rotation shaft of the flap 911A, and the rotation shaft is provided on the side end restricting portion 72 so as to be along the paper transport direction. The base 911C is provided with a member that rotatably supports the shaft 911B and arbitrarily fixes the position of the shaft 911B on the circumference centered on the shaft 911B. For example, although not shown, a leaf spring that rotates together with the shaft 911B may be provided on the shaft of the shaft 911B, and a concave portion for fixing the convex portion provided on the leaf spring at an arbitrary position may be provided on the base 911C. With such a configuration, the hinge mechanism 911 can adjust the inclination angle from the upper end of the side end restricting portion 72 about the rotation axis along the paper transport direction. Therefore, if the flap 911A is fixed to one end of the shaft 911B, the flap 911A can be fixed at an arbitrary position. For example, when manually adjusting the position of the flap 911A, a damper portion 914 may be provided at the other end of the shaft 911B. Further, when the position of the flap 911A is automatically adjusted, the drive motor 913 may be attached to the other end of the shaft 911B via the gear portion 912.

FIG. 4 is a diagram showing an example of various sensors for detecting the paper P in the first embodiment of the present disclosure. In FIG. 4A, the adsorption detection sensor 742 can detect the displacement of the position of the detector 743. Therefore, if the paper P is attracted to the belt member 731 by the suction air portion 741, the position of the detector 743 is displaced. Therefore, whether or not the paper P is attracted to the belt member 731 by the suction detection sensor 742 is determined. Detected. In FIG. 4B, the side edge detection sensor 724 is, for example, a reflection type photoelectric sensor, which includes a light emitting element 724A and a light receiving element 724B, and can detect the paper P passing through the detection area D_A. be. Therefore, it suffices if the floating position of the paper P can be detected by adjusting the detection area D_A by the optical system of the side edge detection sensor 724. The side end air portion 723 can change the amount of side air sprayed according to the floating position of the paper P detected by the side end detection sensor 724.

FIG. 5 is a diagram showing an example of the side edge regulating portion 72 in the first embodiment of the present disclosure as viewed from the rear edge of the paper. As shown in FIG. 5, the hinge mechanism 911 is fixed at a position inclined from the upper end of the side edge restricting portion 72 with the rotation axis along the paper transport direction as the center, so that the hinge among the plurality of sheets of paper P is hinged. The position of the object in contact with the mechanism 911 is shifted. That is, the guide member 91 provided with the hinge mechanism 911 can change the orientation of the paper P, change the posture of the paper P conveyed by the paper feed transport unit 73, and change the posture of the paper P. It is configured as. Such a posture changing unit includes the orientation of the highest-ranked paper P among the plurality of sheets of paper P placed on the mounting table 71 from the start of floating of the paper P to the start of paper transport, and the next highest-ranked paper P. The orientation of the paper P is relatively different. In the posture changing section, the orientation of the top-level paper P in the state of being placed on the mounting table 71 and the orientation of the top-level paper P in the state of being attracted to the paper feed transport unit 73 by the suction of the suction unit 74 are different. The posture of the paper P is changed on the paper P surface so as to be different. In one example of FIG. 5, each of the papers P tilted by the hinge mechanism 911 is in a state of being floated and displaced in the paper width direction, and a force is applied in the paper transport direction by the paper feed transport unit 73. As a result, the orientation of the top-level paper P adsorbed on the paper feed transport unit 73 and the orientation of the top-level next paper P are relatively different. That is, the posture changing unit shifts the orientation of the highest-ranked paper P among the plurality of sheets P placed on the mounting table 71 from the paper transport direction.

FIG. 6 is a diagram showing an example of the side edge regulating portion 72 in the first embodiment of the present disclosure as viewed from above the paper. In one example of FIG. 6, the mounting table 71 is in a state of being tilted from the paper transport direction together with the tip restricting portion 78 and the side end regulating portion 72. Even in such a state, a part of the floating paper P is tilted by the hinge mechanism 911 so that a part of the floating paper P is shifted in the paper width direction and further fed. As a result of the force applied in the paper transport direction by the transport unit 73, the orientation of the top-level paper P adsorbed on the paper feed transport unit 73 and the orientation of the top-level next paper P are relatively relative to each other in the same manner as described above. Be different. In order to change the orientation of the uppermost paper P by using the guide member 91 provided with the hinge mechanism 911, the guide member 91 is arranged on the upstream side in the paper transport direction with respect to the paper feed transport unit 73. It is preferable to have it.

In this way, the fact that the orientation of the top-level paper P and the orientation of the top-level next-level paper P are relatively different means that the top-level paper P and the top-level next-level paper P are in phase with each other. Is equivalent to changing, and the amount of deviation can be changed by the inclination angle of the hinge mechanism 911. The inclination angle of the hinge mechanism 911 may be determined according to at least one of the paper type, the basis weight, and the unevenness pattern of the plurality of sheets P placed on the mounting table 71. Since the paper P placed on the mounting table 71 is sucked in order from the top by the suction unit 74, the phase of the top-level paper P and the lower-level paper P below the top-level paper P is changed. However, at least if the phase of the top-level paper P and the top-level next paper P is changed, the top-level paper P does not carry the top-level next paper P. It is conveyed to the image forming apparatus 3 side. In order to separate the top-level paper P and the top-level next-level paper P, it is preferable to control the tip air and the side air.

FIG. 7 is a diagram specifically showing an example of various types of air blown to the tip of the paper according to the first embodiment of the present disclosure. FIG. 7A is a diagram showing an example in which the spraying operation of the side air and the tip air to the paper P is started in a state where a negative pressure is generated in the suction chamber 740 by the suction air unit 741. By attracting the flap 787 to the solenoid 788B, the tip air is blown horizontally along the surface of the paper P through the tip air opening 784A facing the tip of the paper P. Due to the tip air blown horizontally and the side air blown from the side end air portion 723, a part of the paper P among the plurality of papers P mounted on the mounting table 71 floats. ..

FIG. 7B is a diagram showing an example in which the air blowing of the side air is stopped and the wind direction of the tip air is changed upward while a part of the paper P is floated. Whether or not a part of the paper P has floated may be determined based on the detection result of the side edge detection sensor 724. When the flap 787 is attracted to the solenoid 788A, the wind direction of the tip air becomes upward, and the tips of the plurality of sheets P in which the tip air is floating through the tip air opening 784B facing toward the paper feed transport unit 73. Since the air is blown to the side, it is possible to handle a plurality of floating sheets P.

FIG. 7C is a diagram showing an example of a state in which the blowing of the tip air that handles the floating paper P is stopped. The shutter 785 is provided in the flow path of the tip air blown from the tip air portion 781, and the flow path of the tip air can be opened and closed, and the open / closed state is controlled by the control unit 200. In the example of FIGS. 7A and 7B, since the shutter 785 is attracted to the solenoid 786A, the tip air opening 784C above the tip air portion 781 is closed. In the example of FIG. 7C, since the shutter 785 is attracted to the solenoid 786B, the tip air is blown through the tip air opening 784C. That is, as a result of the tip air being deflected from the paper P, the tip air is not blown to the paper P, so that the tip air is shielded from the paper P and the mounting table 71 is used except for the top paper P that is adsorbed on the paper feed transport unit 73. Fall into.

FIG. 8 is a diagram showing an example in which the paper P placed on the mounting table 71 in the first embodiment of the present disclosure is aligned in an upright direction with respect to the paper transport direction. FIG. 8A is a diagram showing an example in which all the papers P placed on the mounting table 71 are aligned in an upright direction with respect to the paper transport direction. FIG. 8B is a diagram showing an example of a state in which the direction of the surfaced paper P is deviated from the paper transport direction. FIG. 8C is a diagram showing an example in which the orientation of the uppermost paper P among the floating paper P is shifted from the paper transport direction and the orientation of the lower paper P is returned to the original upright state. In this way, of the plurality of sheets P mounted on the mounting table 71, the orientation of the uppermost paper P is shifted from the paper transport direction, and the orientation of the lower paper P is upright on the mounting table 71. It may be aligned.

FIG. 9 is a diagram showing an example in which the paper P placed on the mounting table 71 in the first embodiment of the present disclosure is aligned in the direction of being tilted from the paper transport direction. FIG. 9A is a diagram showing an example in which all the papers P placed on the mounting table 71 are arranged in the direction of being tilted from the paper transport direction. FIG. 9B is a diagram showing an example in which the surfaced paper P is oriented upright with the paper transport direction. FIG. 9C shows an example in which the orientation of the uppermost paper P among the surfaced paper P is set upright with the paper transport direction, and the orientation of the lower paper P is returned to a state of being tilted from the paper transport direction. It is a figure which shows. In this way, among the plurality of sheets P placed on the mounting table 71, the orientation of the uppermost paper P is set to be upright with the paper transport direction, and the orientation of the lower paper P is from the paper transport direction. It may be aligned in the tilted direction.

FIG. 10 is a diagram showing an example of shifting the lower paper P from the paper transport direction when the uppermost paper P is sucked in the first embodiment of the present disclosure. FIG. 10A is a diagram showing an example in which all the papers P placed on the mounting table 71 are aligned in an upright direction with respect to the paper transport direction. FIG. 10B is a diagram showing an example in which the orientation of the surfaced paper P is maintained in an upright orientation with respect to the paper transport direction. FIG. 10C shows an example of a state in which the orientation of the uppermost paper P among the surfaced paper P is maintained in an upright orientation with the paper transport direction, and the orientation of the lower paper P is shifted from the paper transport direction. It is a figure which shows. FIG. 10D is a diagram showing an example of dropping the lower paper P onto the mounting table 71 in a state where the orientation of the lower paper P is shifted from the paper transport direction. In this way, among the plurality of sheets P placed on the mounting table 71, the orientation of the uppermost paper P is maintained in an upright orientation with the paper transport direction, and the orientation of the lower paper P is the paper transport direction. It may be offset from the mounting table 71 and aligned with the mounting table 71. In this way, when the top-level paper P is adsorbed among the plurality of sheets P placed on the mounting table 71, the orientation of the top-level or lower paper P may be shifted.

FIG. 11 is a flowchart illustrating a control example of the paper feed device 2 according to the first embodiment of the present disclosure. In the processes of steps S11 to S19, the paper P is floated, the uppermost paper P is attracted to the paper feed transport unit 73, and the lower paper P is dropped onto the mounting table 71. The processes of steps S20 to S23 change the phase of the paper P, and are effective for, for example, a paper P having a continuous and regular uneven pattern such as embossed paper. .. The processes of steps S14 to S19 and the processes of steps S20 to S23 may be executed in parallel.

In step S11, the control unit 200 starts driving the suction air unit 741. In step S12, the control unit 200 starts driving the front end air unit 781 and the side end air unit 723. In step S13, the control unit 200 determines whether or not the paper P has floated. When the control unit 200 determines that the paper P has floated (step S13; Y), the control unit 200 shifts to the process of step S14. When the control unit 200 determines that the paper P has not floated (step S13; N), the control unit 200 continues the process of step S13. In step S14, the control unit 200 determines whether or not the top-level paper P has been adsorbed. When the control unit 200 determines that the top-level paper P has been adsorbed (step S14; Y), the control unit 200 proceeds to the process of step S15. When the control unit 200 determines that the top-level paper P is not adsorbed (step S14; N), the control unit 200 continues the process of step S14. In step S15, the control unit 200 stops driving the side end air unit 723. In step S16, the control unit 200 changes the wind direction of the tip air blown from the tip air unit 781 from the horizontal direction to the handling direction. In step S17, the control unit 200 determines whether or not the handling time has elapsed. When the control unit 200 determines that the handling time has elapsed (step S17; Y), the control unit 200 shifts to the process of step S18. When the control unit 200 determines that the handling time has not elapsed (step S17; N), the control unit 200 continues the process of step S17. In step S18, the control unit 200 shields the tip air blown from the tip air section 781. In step S19, the control unit 200 stops driving the tip air unit 781.

In step S20, the control unit 200 determines whether or not to change the phase of the second and subsequent sheets P after being sucked. When the control unit 200 determines that the phase of the second and subsequent sheets P is changed after being adsorbed (step S20; Y), the control unit 200 proceeds to the process of step S21. When the control unit 200 determines that the phase of the second and subsequent sheets P is not variable after being sucked (step S20; N), the control unit 200 ends the process of controlling the guide member 91. In step S21, the control unit 200 determines whether or not the placed paper P is tilted with respect to the formed image. When the control unit 200 determines that the placed paper P is tilted with respect to the formed image (step S21; Y), the control unit 200 proceeds to the process of step S22. When the control unit 200 determines that the placed paper P is not tilted with respect to the formed image (step S21; N), the control unit 200 proceeds to the process of step S23. In step S22, the control unit 200 aligns the orientation of the paper P with the formed image by the guide member 91, and ends the process of controlling the guide member 91. In step S23, the control unit 200 causes the guide member 91 to change the orientation of the paper P.

By the configuration and processing as described above, even if the paper P has a continuous and regular uneven pattern such as embossed paper, it is possible to prevent the paper P from being fed. Can be done. FIG. 12 is a diagram showing an example of the embossed paper according to the first embodiment of the present disclosure. FIG. 12A is a diagram showing an example of embossed paper in which uneven patterns are continuously and regularly present at a pitch X1 and a depth X2. FIG. 12B is a diagram showing an example of embossed paper in which uneven patterns are randomly present. Since the embossed paper as shown in FIG. 12A has a continuous uneven pattern over the entire surface of the paper, the upper paper P and the lower paper P are likely to be caught in the uneven portion. With the embossed paper as shown in FIG. 12B, catching is unlikely to occur between the upper paper P and the lower paper P. FIG. 19 is a diagram showing an example of feeding embossed paper by the conventional paper feeding unit 2000. In the paper feed unit 2000, even if the paper P is vibrated in the paper transport direction, which is the paper feed direction, the positions of the upper paper P and the lower paper P are shifted and the phases of the paper P are shifted. The overlapping of different phases causes the paper P to be fed. Further, simply by changing the position of the side air to be blown according to the uneven portion of the paper P, the unevenness is formed over the entire surface of the paper, so that the catching between the paper P cannot be eliminated. That is, unless the configuration and processing are as described above, if the paper P has a continuous and regular uneven pattern such as embossed paper, the paper P is fed. It cannot be prevented.

Therefore, in the present embodiment, among the plurality of sheets P placed on the mounting table 71, the orientation of the top-level paper P and the orientation of the top-level next paper P are relatively different. Therefore, the orientation of the sheets P adjacent to each other in the vertical direction is changed. Therefore, even if the paper P having regular irregularities is loaded, it is possible to prevent the paper P from being fed.

Further, according to the present embodiment, the orientation of the top-level paper P in the state of being placed on the mounting table 71 and the top-level paper P in the state of being attracted to the paper feed transport unit 73 by the suction of the suction unit 74. The posture of the paper P is changed on the paper surface so that the orientation of the paper P is different from that of the paper P. Therefore, the phase of the paper P already adsorbed on the paper feed and transport unit 73 and the paper P not yet adsorbed on the paper feed and transport unit 73 can be reliably shifted. Therefore, it is possible to reliably prevent the occurrence of the carry-out of the paper P.

Further, according to the present embodiment, the orientation of the paper P is changed by the guide member 91 extending to the upper end of the side edge regulating portion 72. Therefore, the orientation of the floating paper P can be changed by the guide member 91. Therefore, the orientation of the floating papers P can be changed with a simple configuration.

Further, according to the present embodiment, the orientation of the uppermost paper P among the plurality of papers P placed on the mounting table 71 is shifted from the paper transport direction. Therefore, the top-level paper P can be reliably displaced from the paper P mounted on the mounting table 71. Therefore, in the operation of feeding the paper P one by one by the paper feed transport unit 73, the phases of the paper P can be reliably shifted from each other.

Further, according to the present embodiment, the plurality of sheets P placed on the mounting table 71 are aligned in an upright direction with respect to the paper transport direction. Therefore, if the floating paper P is shifted from the paper transport direction, the phases of the plurality of sheets P placed on the mounting table 71 and the floating paper P can be easily shifted. Therefore, the phases of the papers P can be easily shifted.

Further, according to the present embodiment, among the plurality of sheets P placed on the mounting table 71, the uppermost sheet P is oriented so as to be upright with the sheet conveying direction. Therefore, if the orientation of the plurality of sheets P mounted on the mounting table 71 is changed, the phases of the plurality of sheets P mounted on the mounting table 71 and the floating paper P can be easily shifted. be able to. Therefore, the phases of the papers P can be easily shifted.

Further, according to the present embodiment, the plurality of sheets P placed on the mounting table 71 are aligned in the direction of being tilted from the paper conveying direction. Therefore, if the floating paper P is set in the paper transport direction, the phases of the plurality of sheets P placed on the mounting table 71 and the floating paper P can be easily shifted. Therefore, the phases of the papers P can be easily shifted.

Further, according to the present embodiment, when the uppermost paper P among the plurality of sheets P placed on the mounting table 71 is sucked by the suction unit 74 to the paper feed transport unit 73, the uppermost paper P is the highest. The orientation of the following paper P is shifted. Therefore, the phase of the paper P attracted to the paper feed transport unit 73 and the paper P at the uppermost level or lower can be reliably shifted. Therefore, it is possible to remarkably prevent the occurrence of the carry-out of the paper P.

Further, according to the present embodiment, among the plurality of sheets P placed on the mounting table 71, the orientation of the uppermost sheet or lower is changed by the hinge mechanism 911. The hinge mechanism 911 is capable of adjusting the inclination angle from the upper end of the side end restricting portion 72. Therefore, the orientation of the paper P below the top can be changed with a simple configuration. Therefore, it is possible to prevent the paper P from being carried forward at low cost.

Further, according to the present embodiment, the guide member 91 is arranged on the upstream side in the paper transport direction with respect to the paper feed transport unit 73. Therefore, it is easy to transmit the force for changing the orientation of the paper P by the guide member 91. Therefore, the orientation of the paper P can be reliably displaced by the force applied to the paper P by the paper feed transport unit 73 and the guide member 91.

Further, according to the present embodiment, at least the highest-ranked paper P and the highest-ranked paper P are according to at least one of the paper type, the basis weight, and the unevenness pattern of the plurality of sheets P placed on the mounting table 71. The phase with the next paper P is changed. Therefore, the phase of the paper P can be changed in consideration of the characteristics of the paper P. Therefore, for example, when the paper P is embossed paper and has regular irregularities, the phases of the papers P can be effectively shifted from each other. The paper type, basis weight, and unevenness pattern of the plurality of sheets P placed on the mounting table 71 may be extracted from the information registered in advance in the image forming apparatus 3, and the image reading unit 10 or the image reading unit 10 or the image reading unit 10 may be used. It may be acquired by a device such as an image pickup device (not shown) that can read the surface state of the paper P and convert it into various data. These various data may be appropriately adjusted according to the hardware configuration of the paper feeding device 2.

Embodiment 2.
In the second embodiment, the same configurations and functions as those in the first embodiment will be omitted. In the second embodiment, the tip regulating unit 78, the suction unit 74, and the paper feed transport unit 73 have the same configuration as that of the first embodiment. In the second embodiment, the posture changing portion is different from the first embodiment. FIG. 13 is a diagram showing an example of a position where side air is blown according to the second embodiment of the present disclosure as viewed from above the paper. FIG. 14 is a diagram showing an example of a control system of the paper feed device 2 according to the second embodiment of the present disclosure. FIG. 13A is a diagram showing an example of a state before the paper P is tilted from the paper transport direction. FIG. 13B is a diagram showing an example of a state after the paper P is tilted from the paper transport direction. As shown in FIGS. 13A and 13B, the side edge regulating section 72_11 and the side edge regulating section 72_12 are arranged on the downstream side in the paper transport direction from the rear end position of the paper feed transport section 73, and supply. It is shorter in the paper transport direction than the paper transport section 73. In the present embodiment, when the side end regulation unit 72_11 and the side end regulation unit 72_12 are collectively referred to, they are referred to as the side end regulation unit 72.

The side edge restricting portion 72_11 faces one end portion in the width direction of the paper P. The side edge restricting portion 72_12 faces the other end portion in the width direction of the paper P. Therefore, the position of the paper P in the width direction is restricted between the inside of the side edge regulating portion 72_11 and the inside of the side edge regulating portion 72_12. A first side end air portion 723_1 is provided on the outside of the side end restricting portion 72_1. A second side end air portion 723_2 is provided on the outside of the side end restricting portion 72_12. That is, the first side end air portion 723_1 is arranged on either side of the paper P along the paper transport direction, and blows air to one of the side ends of the paper P. The second side end air portion 723_2 is arranged on either side of the paper P along the paper transport direction, and blows air to the other side end of the paper P. The first side end air portion 723_1 and the second side end air portion 723_1 are configured as posture changing portions in the present embodiment.

Specifically, the attitude changing portion includes the first side end air portion 723_1 and the second side end air portion 723_1, and the wind direction of the first side air blown from the first side end air portion 723_1. , The direction of the second side air blown from the second side end air portion 723_2 is reversed, and the action line L1 of the first side air and the action line L_2 of the second side air do not match. Let me. In the present embodiment, when the first side end air portion 723_1 and the second side end air portion 723_1 are collectively referred to as the side end air portion 723. More specifically, as shown in FIG. 14, the side end air portion 723 includes a fan 921 and a drive motor 922 for driving the fan 921. The blowing position and the blowing air volume of the first side air and the second side air are determined according to at least one of the paper type, the basis weight, the size, and the pattern of the unevenness of the paper P.

For example, the fan 921 and the drive motor 922 itself may be moved by the drive motor 924 via the gear portion 923. Further, the direction of the duct portion 925 connecting the side end air opening 721 and the fan 921 is changed by the drive motor 926, so that the wind directions of the first side air and the second side air blown from the fan 921 are changed. It may be configured to be. Further, the drive motor 922 may have a configuration in which the air volumes of the first side air and the second side air blown out from the fan 921 can be changed by changing the rotation speed according to the input pulse. Further, by controlling the shutter 927 provided in the side end air opening 721 by the drive motor 928, the opening area of the side end air opening 721 is variable, and the air volumes of the first side air and the second side air are variable. It may be configured to be. With any of the above configurations or a combination thereof, the top-level paper P that has risen above the side edge restricting portion 72 can be attracted to the paper feed transport unit 73 in an inclined state. In the present embodiment, the first side air and the second side air are collectively referred to as side air.

FIG. 15 is a flowchart illustrating a control example of the paper feed device 2 according to the second embodiment of the present disclosure. Since the processing of steps S51 to S59 is the same as the processing of steps S11 to S19, the description thereof will be omitted. However, the process of step S51 may be executed before step S41, or may be executed between steps S41 and S50. In step S41, the control unit 200 determines whether or not to change the spraying position of the side air. When the control unit 200 determines that the side air blowing position is to be changed (step S41; Y), the control unit 200 shifts to the process of step S42. When the control unit 200 determines that the side air blowing position is not changed (step S41; N), the control unit 200 proceeds to the process of step S46. In step S42, the control unit 200 determines whether or not to move the fan 921. When the control unit 200 determines that the fan 921 is to be moved (step S42; Y), the control unit 200 shifts to the process of step S43. When the control unit 200 determines that the fan 921 is not moved (step S42; N), the control unit 200 shifts to the process of step S44. It is preferable to move the drive motor 922 together with the fan 921, but if the configuration is such that the driving force of the drive motor 922 can be transmitted even if the distance between the fan 921 and the drive motor 922 is large, only the fan 921 is moved. You may let me.

In step S43, the control unit 200 determines the moving position of the fan 921 according to at least one of the paper type, the basis weight, and the unevenness pattern of the paper P. In step S44, the control unit 200 determines whether or not to change the wind direction of the side air. When the control unit 200 determines that the wind direction of the side air is changed (step S44; Y), the control unit 200 shifts to the process of step S45. When the control unit 200 determines that the wind direction of the side air does not change (step S44; N), the control unit 200 shifts to the process of step S46. In step S45, the control unit 200 determines the wind direction of the side air according to at least one of the paper type, the basis weight, and the unevenness pattern of the paper P. In step S46, the control unit 200 determines whether or not to change the blown air volume of the side air. When the control unit 200 determines that the blown air volume of the side air is to be changed (step S46; Y), the control unit 200 shifts to the process of step S47. When the control unit 200 determines that the blown air volume of the side air is not changed (step S46; N), the control unit 200 shifts to the process of step S51. In step S47, the control unit 200 determines whether or not to change the air volume of the fan 921. When the control unit 200 determines that the air volume of the fan 921 is changed (step S47; Y), the control unit 200 shifts to the process of step S48. When the control unit 200 determines that the air volume of the fan 921 is not changed (step S47; N), the control unit 200 proceeds to the process of step S49.

In step S48, the control unit 200 determines the rotation speed of the fan 921 according to at least one of the paper type, the basis weight, and the unevenness pattern of the paper P. In step S49, the control unit 200 determines whether or not to change the opening area of the side end air opening 721. When the control unit 200 determines that the opening area of the side end air opening 721 is to be changed (step S49; Y), the control unit 200 shifts to the process of step S50. When the control unit 200 determines that the opening area of the side end air opening 721 is not changed (step S49; N), the control unit 200 shifts to the process of step S51. In step S50, the control unit 200 determines the opening area of the side end air opening 721 according to at least one of the paper type, the basis weight, and the unevenness pattern of the paper P.

In any of the processes of step S43, step S45, step S48, and step S50, as the pitch X1 in the uneven pattern increases, a larger force is applied to the paper P in order to change the orientation of the paper P. Need to give. The same applies when the depth X2 in the uneven pattern becomes large.

From the above description, according to the present embodiment, the wind direction of the first side air blown from the first side end air portion 723_1 and the second side air blown from the second side end air portion 723_1. The wind direction is reversed, and the action line L_1 of the first side air and the action line L_1 of the second side air are made to be inconsistent. Therefore, torque is generated on the floating paper P. Therefore, the top-level paper P and the lower-level paper P can be reliably separated.

Further, in the present embodiment, the side edge restricting unit 72 is arranged on the downstream side in the paper transport direction from the rear end position of the paper feed transport unit 73, and is shorter than the paper feed transport unit 73 in the paper transport direction. Therefore, the first side air and the second side air can easily generate torque in the paper P. Therefore, the top-level paper P and the lower-level paper P can be separated particularly remarkably.

Embodiment 3.
In the third embodiment, the description of the same configuration and function as those of the first and second embodiments will be omitted. Specifically, in the third embodiment, the tip regulating portion 78 and the suction portion 74 have the same configuration as that of the first embodiment, and the arrangement location and the length of the side end regulating portion 72 have the same configuration as that of the second embodiment. .. The third embodiment is characterized in that different controls are executed for the tilt correction amount of a part of the paper P and the tilt correction amount of the other part of the paper P along the width direction of the paper P. Is different. FIG. 16 is a diagram showing an example of the paper feed transfer units 73_1 and 73_2 in the third embodiment of the present disclosure as viewed from above the paper. FIG. 17 is a diagram showing an example of a control system of the paper feed device 2 according to the third embodiment of the present disclosure. As shown in FIGS. 16 and 17, a paper feed transport unit 73_1 and a paper feed transport unit 73_1 are provided along the width direction of the paper P. The paper feed transport unit 73_1 includes a first belt member 731_1, a drive roller 733_1, and a driven roller 734_1. The paper feed transfer unit 73_2 includes a second belt member 731_2, a drive roller 733_2, and a driven roller 734_2. The side edge restricting portion 72_21 faces one end portion in the width direction of the paper P, and includes a side end air portion 723 and a side edge detection sensor 724. The side end restricting portion 72_22 faces the other end portion in the width direction of the paper P, and includes a side end air portion 723 and a side edge detection sensor 724. The first belt member 731_1 and the second belt member 731_1 have different inclination correction amounts. In the present embodiment, when the paper feed transport unit 73_1 and the paper feed transport unit 73_2 are collectively referred to, they are referred to as the paper feed transport unit 73. Further, in the present embodiment, when the side end regulation unit 72_21 and the side end regulation unit 72_22 are generically referred to, they are referred to as the side end regulation unit 72.

That is, the paper feed transport unit 73 is arranged on at least one of the first belt member 731_1 arranged along the paper width direction orthogonal to the paper transport direction and both ends of the first belt member 731_1. The belt member 731_2 of the above is provided. The first belt member 731_1 and the second belt member 731_2 are configured as posture changing portions in the present embodiment. In the first belt member 731_1, the inclination correction amount of the paper P is changed by driving the drive roller 733_1 controlled by the control unit 200. In the second belt member 731_2, the inclination correction amount of the paper P is changed by driving the drive roller 733_2 controlled by the control unit 200. The paper P is changed to a tilted state due to the difference in the tilt correction amount of the first belt member 731_1 and the second belt member 731_1. At this time, the rear end of the paper P that is detached from the paper feed / transport unit 73 hangs down, but since the side end regulation unit 72 is shorter than the paper feed / transport unit 73, the rear end and the side end of the paper P are side ends. It is not regulated by the regulatory unit 72. Therefore, the phases of the uppermost paper P and the lower paper P are variable. Therefore, if the paper feed transport unit 73_1 and the paper feed transport unit 73_1 are driven in synchronization with each other after the paper P is started to be conveyed, the paper P is conveyed to the downstream side in an inclined posture, which is the highest level. The paper P can be conveyed by preventing the uneven patterns of the paper P and the lower paper P from overlapping with each other. In the present embodiment, when any one of the paper feed transport unit 73_1 and the paper feed transport unit 73_2 is not particularly limited, it is referred to as a paper feed transport unit 73, and any one of the drive roller 733_1 and the drive roller 733_1 is not particularly limited. , The driven roller 733, and when any one of the driven roller 734_1 and the driven roller 734_2 is not particularly limited, it is referred to as the driven roller 734.

FIG. 18 is a flowchart illustrating a control example of the paper feed device 2 according to the third embodiment of the present disclosure. Since the processing of steps S71 to S79 is the same as the processing of steps S11 to S19, the description thereof will be omitted. In step 80, the control unit 200 determines the tilt correction amount of the paper P for each paper feed transport unit 73 to be a different tilt correction amount. In step S81, the control unit 200 starts driving the drive roller 733 of each paper feed transfer unit 73. In step S82, the control unit 200 determines whether or not the set time has elapsed. When the control unit 200 determines that the set time has elapsed (step S82; Y), the control unit 200 shifts to the process of step S83. When the control unit 200 determines that the set time has not elapsed (step S82; N), the control unit 200 continues the process of step S82. In step S83, the control unit 200 determines whether or not to start the transfer of the paper P. When the control unit 200 determines that the transfer of the paper P is to be started (step S83; Y), the control unit 200 shifts to the process of step S84. When the control unit 200 determines that the transfer of the paper P is not started (step S83; N), the control unit 200 continues the process of step S83. In step S84, the control unit 200 synchronizes the drive of the drive rollers 733 of the respective paper feed transfer units 73, and ends the process of tilting the top-level paper P. However, when the paper P is continuously conveyed, the processes of steps S71 to S84 are also executed on the paper P which is the next highest paper among the lower paper P.

From the above description, in the present embodiment, the inclination correction amounts of the first belt member 731_1 and the second belt member 731_1 are controlled to be different from each other. Therefore, torque is generated on the paper P adsorbed on the first belt member 731_1 and the second belt member 731_2. Therefore, the top-level paper P and the lower-level paper P can be reliably separated.

Although the image forming system 1 according to the present disclosure has been described above based on the embodiment, the present disclosure is not limited to this, and changes may be made without departing from the gist of the present disclosure. For example, in the present embodiment, an example in which the image forming system 1 includes the paper feeding device 2 and the image forming apparatus 3 has been described, but the present invention is not particularly limited thereto. For example, the image forming system 1 may include an image reading device, a relay device, a post-processing device, and the like. Further, in the present embodiment, an example in which the paper feed device 2 has an external configuration has been described, but the present disclosure is not limited to this. The configuration described in this embodiment may be applied to the paper feed unit 51 in the image forming apparatus 3. Further, in the present embodiment, an example in which the guide member 91 includes the hinge mechanism 911 has been described, but the hinge mechanism 911 may be composed of, for example, a so-called torque hinge.

1 Image forming system, 100 Control unit 2 Paper feeding device, 200 Control unit 201, 201A, 201B, 201C, 2000 Paper feeding unit 3 Image forming device, 10 Image reading unit, 11 Automatic document feeder 12 Original image scanning device, 20 Operation display unit, 21 display unit, 22 operation unit 30 image processing unit, 40 image forming unit 50 paper transport unit, 51 paper feed unit, 52 paper discharge unit, 53 transport path unit, 60 fixing unit 71 mounting table, 72, 72_11 , 72_12, 72_21, 72_22 Side end regulation part 721 Side end air opening 723 Side end air part, 723_1 First side end air part, 723_1 Second side end air part 724 Side end detection sensor, 724A Floodlight element, 724B Light receiving element 73,73_1,73_2 Paper feed transfer unit 731,731_1,731_2 Belt member 732 holes, 733,733_1,733_2 Drive roller 734,734_1,734_2,734A, 734B, 734C Driven roller 74 suction unit, 740 suction chamber, 741 Suction air section 742 Suction detection sensor, 743 Detector 75 Transport path section, 751 Paper feed detection sensor, 752 Transport roller 753 Driven roller, 754 Transport guide 78 Tip control section, 781 Tip air section, 782 Tip control member 784,784A, 784B, 784C Tip air opening 785 shutter, 786,786A, 786B solenoid 787 flap, 788,788A, 788B solenoid 91 guide member, 911 hinge mechanism 911A flap, 911B shaft, 911C base, 912 gear part 913 drive motor, 914 damper part , 915 drive motor 921 fan, 922 drive motor, 923 gear part, 924 drive motor 925 duct part, 926 drive motor 927 shutter, 928 drive motor P, S paper, R11 to R15 transport roller, D_A detection area L_1, L_1 action line , X1 pitch, X2 depth

Claims (17)

A mounting table on which multiple sheets of paper are placed, and
A suction unit that sucks multiple sheets of paper placed on the above-mentioned stand in order from the top,
A paper feed transport unit that transports paper sucked by the suction unit, and a paper feed transport unit.
A posture changing unit that changes the posture of the paper transported by the paper feed transport unit from the start of floating of the paper to the start of paper transport.
Equipped with
The posture change part is
Of the plurality of sheets placed on the above-mentioned table, the orientation of the top-level paper with respect to the paper transport direction and the orientation of the top-level next paper with respect to the paper transport direction are relatively different.
Paper feed device. The posture change part is
The orientation of the top-level paper placed on the above-mentioned table with respect to the paper transport direction and the direction of the top-level paper sucked by the suction unit with respect to the paper transport direction. Change the posture of the paper on the paper surface so that the orientation is different.
The paper feeding device according to claim 1. A side edge restricting portion that is arranged along the paper transport direction and regulates the side edge of the paper,
A guide member extending to the upper end of the side end regulating portion,
Further prepare
The guide member is
It abuts on the side edge of the paper and
The posture change part is
The guide member is included, and the guide member changes the orientation of the paper with respect to the paper transport direction .
The paper feeding device according to claim 1 or 2. A first side edge air portion that is arranged on either side of the paper along the paper transport direction and blows air to the side edge of the paper.
A second side end air portion that is arranged on either end side of the paper along the paper transport direction and blows air to the side edge of the paper.
Further prepare
The posture change part is
Including the first side end air portion and the second side end air portion.
The wind direction of the first side air blown from the first side end air portion and the wind direction of the second side air blown from the second side end air portion are reversed, and the first side air is blown. The line of action of the side air and the line of action of the second side air are made to be inconsistent.
The paper feeding device according to claim 1 or 2. The paper feed carrier
The first belt member arranged along the paper width direction orthogonal to the paper transport direction, and
A second belt member arranged on at least one of both ends of the first belt member,
Equipped with
The posture change part is
The first belt member and the second belt member are included.
The inclination correction amounts of the first belt member and the second belt member are different.
The paper feeding device according to claim 1 or 2. The posture change part is
Of the plurality of sheets placed on the above-mentioned table, the orientation of the top-level paper with respect to the paper transport direction is shifted from the paper transport direction.
The paper feeding device according to any one of claims 3 to 5. The plurality of sheets of paper placed on the above-mentioned table are aligned in an upright direction with the paper transport direction.
The paper feeding device according to claim 6. The posture change part is
Of the plurality of sheets placed on the above-mentioned table, the orientation of the top-level paper with respect to the paper transport direction is set to be upright with the paper transport direction.
The paper feeding device according to any one of claims 3 to 5. The plurality of sheets of paper placed on the above-mentioned table are arranged in a state of being tilted from the paper transport direction.
The paper feeding device according to claim 8. The posture change part is
When the highest-ranked paper among the plurality of sheets placed on the above-mentioned table is attracted to the paper feed / transport unit by the suction of the suction unit, the orientation of the paper at the highest level or lower with respect to the paper transport direction is set. Shift,
The paper feeding device according to claim 3. The guide member is
A hinge mechanism that can adjust the tilt angle from the upper end of the side edge restricting portion around the rotation axis along the paper transport direction.
Equipped with
The posture change part is
Of the plurality of sheets placed on the above-mentioned table, the direction of the top-level or lower paper with respect to the paper transport direction is changed by the hinge mechanism.
The paper feeding device according to claim 10. The guide member is
It is arranged on the upstream side in the paper transport direction with respect to the paper feed transport unit.
The paper feeding device according to claim 11. A side edge regulating unit, which is arranged along the paper transport direction and regulates the side edge of the paper.
Further prepare
The side end regulation part
It is arranged on the downstream side in the paper transport direction from the rear end position of the paper feed transport unit, and is shorter than the paper feed transport unit in the paper transport direction.
The paper feeding device according to claim 4 or 5. The posture change part is
At least the phase of the top-level paper and the top-level next-level paper is changed according to at least one of the paper types, basis weights, and uneven patterns of the plurality of sheets placed on the above-mentioned table. ,
The paper feeding device according to any one of claims 1 to 13. The tip air section that blows air to the tips of multiple sheets of paper placed on the above-mentioned stand, and
A shutter provided in the flow path of the tip air blown from the tip air portion and capable of opening and closing the flow path of the tip air,
A control unit that controls the open / closed state of the shutter, and
Further prepare,
The paper feeding device according to any one of claims 1 to 14. A mounting table on which multiple sheets of paper are placed, and
A suction unit that sucks multiple sheets of paper placed on the above-mentioned stand in order from the top,
A paper feed transport unit that transports paper sucked by the suction unit, and a paper feed transport unit.
A posture changing unit that changes the posture of the paper transported by the paper feed transport unit from the start of floating of the paper to the start of paper transport .
Equipped with
The posture change part is
Of the plurality of sheets placed on the above-mentioned table, the orientation of the top-level paper with respect to the paper transport direction and the orientation of the top-level next paper with respect to the paper transport direction are relatively different.
Image forming device. A mounting table on which multiple sheets of paper are placed, and
A suction unit that sucks multiple sheets of paper placed on the above-mentioned stand in order from the top,
A paper feed transport unit that transports paper sucked by the suction unit, and a paper feed transport unit.
A posture changing unit that changes the posture of the paper transported by the paper feed transport unit from the start of floating of the paper to the start of paper transport .
Equipped with
The posture change part is
Of the plurality of sheets placed on the above-mentioned table, the orientation of the top-level paper with respect to the paper transport direction and the orientation of the top-level next paper with respect to the paper transport direction are relatively different.
Image formation system.

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