JP2013215810A - Sheet processing device and image forming system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a problem that a recut sheet pieces stick to an upper part of a receiving container or a part other than the receiving container in the case of recutting the sheet pieces including end parts of cut sheets.SOLUTION: It is controlled so that a sheet is recut into decided length by deciding a cut length when a sheet is recut based on at least one of information relating to a recording medium and information relating to an environment around a device.

Description

  The present invention relates to a paper processing apparatus having a cutting mechanism for cutting a paper edge and an image forming system including the paper processing apparatus.

  2. Description of the Related Art A sheet processing apparatus that performs various processes on a sheet is known that has a configuration that cuts a portion having a predetermined width from an end portion of a sheet. This process is often performed when an image without a margin is formed by cutting a margin portion of a sheet on which an image is formed. Specifically, for example, as shown in FIG. 9A, only a predetermined width w from the edge of the paper on which the image I is formed to the inside of the edge of the image I is cut, leaving a margin. Thus, it is possible to provide a sheet on which an image without margins is formed.

  Since the sheet pieces cut at this time are generally unnecessary, they are stored in a storage container and discarded together. The storage container can store a piece of paper as much as it can fit in the volume, and by providing a sensor or the like, it can often be detected that the storage container is full by the paper piece. Further, in this case, when it is detected by the sensor or the like that the storage container is full, the above-described cutting operation is stopped, and a display prompting the user to discard the contents of the storage container is often made. .

  By the way, referring to FIG. 9A, the sheet piece cut as described above has a width w and a length equal to the length of one side of the sheet. The aspect ratio is high, i.e. the paper strip is elongated.

  If such elongated paper pieces are continuously stored in the storage container, a wasteful space in which no paper pieces are present is created in the storage container, and soon the full detection of the storage container is detected. It was. This causes problems such as a decrease in productivity due to frequent interruption of the cutting operation and an increase in the number of complicated operations such as disposal of the contents of the storage container.

  In order to solve such a problem, a configuration is adopted in which an elongated paper piece once cut is cut again every predetermined length L as shown in FIG. ing. As a result, the wasteful space in the storage container described above is remarkably reduced, the amount of paper pieces that can be stored before the storage container is full is increased, the cutting operation is interrupted, and the contents of the storage container are discarded. The frequency is low.

  As a similar technique, Patent Document 1 detects the length of the fabric supplied to the cutter, and if the detected length is longer than a predetermined length, the fabric cut by the cutter is again supplied to the cutter. A cutting device is described in which the fabric that is fed to and fed again is cut with a cutter.

JP-A-7-314393

  However, depending on the type of paper to be cut, the environment in the paper processing apparatus, etc., there is a problem that the paper piece that has been cut again does not fall into the storage container and sticks to a portion other than the storage container due to electrostatic force. It was. When such a phenomenon occurs, it becomes difficult to collect the stuck paper piece, or an erroneous full detection is made by sticking the paper piece to the sensor part that detects the fullness of the container, Such problems will occur.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems. When a paper piece including a cut paper edge portion is cut again, the cut paper piece adheres to an upper portion of the storage container or a portion other than the storage container. The purpose is to prevent malfunctions.

  As means for solving the above-mentioned problems, the invention according to claim 1 is characterized in that the first cutting section for cutting the recording medium into a part including one side of the recording medium and the other, and the first cutting part. A second cutting unit that cuts a part including one side of the recording medium cut by the cutting unit so as to cross the one side and a side opposite to the one side, and the second cutting unit. Based on the storage container for storing the recording medium, information acquisition means for acquiring either or both of the information about the recording medium and the information about the environment around the paper processing device, and the information acquired by the information acquisition means A cutting length determining means for determining a length in a direction along the one side including the one side of the recording medium after cutting by the second cutting unit, and a part including the one side of the recording medium, The length in the direction along the one side is the cutting length. And control means for controlling the second cutting section in order to cut such that the length determined by the determining means is a sheet processing apparatus having a.

  According to a second aspect of the present invention, the information acquisition unit includes, as information about the recording medium, a length in a direction orthogonal to a part of the one side including the one side of the recording medium after being cut by the first cutting unit. The sheet processing apparatus according to claim 1, wherein information on the length is acquired.

  The invention according to claim 3 is the sheet processing apparatus according to claim 1 or 2, wherein the information acquisition means acquires information relating to a type of the recording medium as information relating to the recording medium.

  The invention according to claim 4 is characterized in that the information acquisition means acquires information relating to the recording material attached to the recording medium as information relating to the recording medium. It is a paper processing apparatus of description.

  The paper according to any one of claims 1 to 4, wherein the information acquisition means acquires information relating to the amount of recording medium as information relating to the recording medium. It is a processing device.

  The invention according to claim 6 is characterized in that the information acquisition means acquires information on the humidity around the paper processing apparatus as information on the environment in the paper processing apparatus. The sheet processing apparatus according to claim 1.

  According to a seventh aspect of the present invention, the second cutting unit includes a rotary blade that is rotatably supported and a rotation driving unit that rotationally drives the rotary blade in the previous period, and the control unit includes the cutting length. The sheet processing apparatus according to any one of claims 1 to 6, wherein a rotation speed of the rotary blade by the rotation driving unit is controlled according to a length determined by a length determination unit. .

  According to an eighth aspect of the present invention, the second cutting unit includes a reciprocating blade supported so as to be capable of reciprocating, and a reciprocating drive unit that reciprocates the reciprocating blade, and the control unit includes the cutting unit. The sheet processing according to any one of claims 1 to 6, wherein a cycle of the reciprocating motion of the reciprocating blade by the reciprocating drive unit is controlled according to a length determined by a length determining unit. Device.

  The invention according to claim 9 has a conveying means for conveying a part including one side of the recording medium cut by the first cutting unit to the second cutting unit, and the control unit The sheet processing apparatus according to claim 1, wherein the conveyance unit is controlled so as to control a partial conveyance speed including one side of the recording medium.

  According to a tenth aspect of the present invention, the cutting length determination unit determines a length in a conveyance direction of the recording medium cut by the second cutting unit so as not to be shorter than a predetermined first length. The sheet processing apparatus according to claim 1, wherein the sheet processing apparatus is a sheet processing apparatus.

  According to an eleventh aspect of the present invention, the cutting length determination means is a recording medium that is cut by the second cutting unit so as not to be longer than a predetermined second length that is longer than the first length. The sheet processing apparatus according to claim 10, wherein a length in the transport direction is determined.

  The invention according to claim 12 is characterized in that the first cutting unit cuts the recording medium into a part including one side in a direction along the conveyance direction of the recording medium and the other part. 1. The sheet processing apparatus according to claim 1.

  A thirteenth aspect of the invention includes an image forming apparatus that forms an image on a recording medium, and the paper processing apparatus according to any one of the first to twelfth aspects connected to the image forming apparatus. The first cutting unit is an image forming system that cuts a recording medium on which an image is formed by the image forming apparatus.

  According to a fourteenth aspect of the present invention, there is provided a margin mode setting means capable of setting so as to eliminate a margin of an image formed by the image forming apparatus, and the control means sets a margin by the margin mode setting means. The image forming system according to claim 13, wherein the first cutting unit is controlled to cut the recording medium inside an end portion of the formed image when set to be eliminated. is there.

  According to a fifteenth aspect of the present invention, in the image forming system according to the thirteenth or fourteenth aspect, the control unit is provided for the image forming apparatus.

  According to a sixteenth aspect of the present invention, in the image forming system according to any one of the thirteenth to fifteenth aspects, the information acquisition unit is provided for the image forming apparatus.

  The invention according to claim 17 is the image forming system according to any one of claims 13 to 16, wherein the cutting length determining means is provided for the image forming apparatus. is there.

  According to the present invention, when cutting an elongated sheet piece again with an appropriate length depending on the sheet to be cut and the environment in the apparatus, the container can accommodate more sheet pieces than when not cutting again. It is possible to prevent problems caused by the recut paper pieces adhering to the upper part of the storage container or other parts than the storage container.

1 is a cross-sectional view illustrating the overall configuration of a sheet processing apparatus according to a first embodiment of the present invention. 1 is a block diagram illustrating an electrical configuration of an entire sheet processing apparatus according to a first embodiment of the present invention. It is an image figure which shows a mode that the edge part of paper is cut. It is a figure which shows a mode that a paper piece is cut again. 5 is a flowchart illustrating a control procedure of paper cutting control by a paper processing control unit. It is a flowchart which shows the procedure of the shredding length determination process by a paper process control part. It is sectional drawing which shows the structure of the whole image forming system in the 2nd Embodiment of this invention. FIG. 6 is a block diagram illustrating an electrical configuration of the entire image forming system according to a second embodiment of the present invention. It is an image figure about cutting of paper.

  The first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a configuration of the entire sheet processing apparatus in the present embodiment.

  The paper processing apparatus A includes a slitter 74 that cuts both ends in the transport direction of the transported paper, a shredder 75 that further shreds a piece of paper cut by the slitter 74, and a paper shredded by the shredder 75. A shooter 76 that guides the piece, a storage container 77 that stores a piece of paper guided by the shooter 76, and the like are included. Here, the slitter 74 serves as a first cutting unit that cuts the paper into a part including one side and the other. Further, the shredder 75 serves as a second cutting unit that cuts a part including one side of the paper cut by the slitter 74 so as to cross the one side and the side facing the one side.

  The sheet is conveyed into the sheet processing apparatus A by a pair of carry-in rollers 71. Here, the sheet processing apparatus A is provided with a processing setting unit 79. The processing setting unit 79 includes, for example, an operation unit and a display unit, and the user sets how much width is to be cut from the edge of the paper in the processing setting unit 79 before the paper is carried in. . In the process setting unit 79, information such as the type of paper to be carried in, the amount of paper, and the printing rate when an image is formed on the paper in advance can be input. Based on the input information, the cutting length of a sheet piece to be described later is controlled.

  The sheet conveyed into the sheet processing apparatus A is guided in the direction of the conveyance path a by the branching unit 72, and the leading end is abutted against the stopper 73.

  The skew of the sheet is corrected by causing the leading end of the sheet to abut against the stopper 73. Thereafter, the leading and trailing edges of the sheet are reversed and the conveyance is resumed. When the conveyance is resumed, the paper is cut at both ends by the slitter 74. By making the both ends of the sheet cut by the slitter 74 immediately after the sheet is abutted against the stopper 73 and the conveyance is resumed, the sheet can be cut in parallel to the both ends of the sheet.

  The piece of paper cut by the slitter 74 is sent to the shredder 75 and further cut for each length determined by the procedure described later. The piece of paper cut in the shredder 75 is guided to the storage container 77 by the shooter 76. For the container 77, a sensor S1 is provided. The sensor S1 includes a light emitting unit and a light receiving unit, and detects that the inside of the storage container 77 is full of paper pieces.

  On the other hand, the paper whose both ends in the transport direction are cut by the slitter 74 is further transported and discharged out of the paper processing apparatus A by the discharge roller pair 78.

  Further, the sheet processing apparatus A is provided with a sheet processing control unit 80, and controls the operation of each configuration described above. Further, a humidity detector 81 is provided in the sheet processing apparatus A, and measures the humidity outside the apparatus. Information on the humidity measured by the humidity detector 81 is sent to the paper processing controller 80. Based on this information, the sheet processing control unit 80 controls the cutting length of the sheet piece by the shredding unit 75 as described later.

  FIG. 2 is a block diagram illustrating an electrical configuration of the entire sheet processing apparatus A according to the present embodiment. The same components as those shown in FIG. 1 are denoted by the same reference numerals as those in FIG. The paper processing apparatus A includes a slitter 74, a shredding unit 75, a processing setting unit 79, a paper processing control unit 80, a humidity detection unit 81, a ROM 83, a RAM 84, a sensor S1, and the like.

  The sheet processing control unit 80 serves as a control unit that controls the operation of each unit of the sheet processing apparatus A. Information is transmitted from the processing setting unit 79, the humidity detection unit 81, and the sensor S1 to the sheet processing control unit 80, and based on these pieces of information, the slitter 74, the shredding unit 75, and other components are controlled for operation. Done.

  Various programs or data are stored in the ROM 83, and the paper processing control unit 80 reads out the programs or data from the ROM 83 and controls each unit of the paper processing apparatus A. In the ROM 83, information on the cutting length by the shredding unit 75 is stored in advance in association with information on the type of paper, the amount of paper, and the printing rate when an image is previously formed on the paper. Based on this information, the cutting length of a sheet piece to be described later is controlled.

  The RAM 84 is a place for temporarily storing a program or data necessary for the sheet processing control unit 80 to control the operation of each unit.

  FIG. 3 is a view of the state of cutting the edge of the sheet in the sheet processing apparatus A as viewed in the direction of arrow D in FIG. The sheet P is transported in the direction of arrow E after being abutted against the stopper 73. Then, both ends Pa and Pb are cut by the slitter 74 while being conveyed in the direction of arrow E. Both ends Pa and Pb include one side Za and Zb of the paper P, respectively.

  The slitter 74 includes a pair of rotating blades 74a and 74b. The blades 74a and 74b are configured to be movable in the direction perpendicular to the arrow E and along the surface of the paper P, respectively. The blades 74a and 74b are respectively moved by driving means (not shown) according to the values of the cutting widths wa and wb set in advance in the process setting unit 79. As a result, the both ends Pa and Pb of the sheet are cut exactly as set in the process setting unit 79.

  FIG. 4 is a diagram showing details of the configuration of the shredder 75. As shown in FIG. 4A, the shredded portion 75 is provided at two positions (75a, 75b) at positions corresponding to the paths of the paper pieces Pa and Pb.

  FIG. 4B shows a state in which the shredder 75a cuts the sheet piece Pa. The shredder 75a includes a fixed blade 751a, a rotary blade 752a, and a motor M1a that rotationally drives the rotary blade 752a.

  The fixed blade 751a includes a support portion 7511a and a blade portion 7512a, and the rotary blade 752a includes a support portion 7521a and a blade portion 7522a. The blade portion 7522a of the rotary blade 752a is helically attached to the support portion 7521a.

  The sheet piece Pa cut by the slitter 74 is guided in the direction toward the shredder 75a and falls. The sheet piece Pa is cut at a portion X where the phase of the blade portion 7512a of the fixed blade 751a and the phase of the blade portion 7522a of the rotary blade 752a rotated counterclockwise by the motor M1a overlap each other. .

  By rotating the rotary blade 752a at a predetermined speed by the motor M1a, it is possible to continuously cut the falling paper pieces Pa to a predetermined length as shown in FIG. 9B.

  FIG. 9B shows an example of cutting in a direction orthogonal to one side Z of the paper, but the cutting direction does not necessarily have to be orthogonal to one side Z of the paper. The cutting direction by the shredded portion 75 may be slightly skewed, and at least the cut end reaches the side Z ′ facing the side Z, that is, the side Z ′ facing the side Z It is only necessary to cut to cross.

  Further, the rotational driving speed of the rotary blade 752a by the motor M1a can be controlled by the paper processing control unit 80, whereby the length L at which the paper piece Pa is cut can be controlled. Specifically, when the cutting length L is increased, the rotational drive speed is controlled to be decreased.

  4B shows the shredded portion 75a as an example, the shredded portion 75b has the same configuration, and the CPU 50 controls the rotational driving speed of the rotary blade 752b by the motor M1b. By doing so, it is possible to control the length by which the sheet piece Pb is cut.

  As another configuration example of the shredded portion 75a, as shown in FIG. 4C, the reciprocating blade 753a is reciprocated in the left-right direction in the drawing by driving the motor M2a, and the paper piece Pa is passed through. A configuration in which Pa is cut is conceivable. In the case of such a configuration, it is possible to control the length by which the sheet piece Pa is cut by controlling the cycle of the reciprocating motion of the reciprocating blade 753a by the motor M2a. The same can be said for the shredded portion 75b.

  As another example of the configuration of the shredder 75a, as shown in FIG. 4D, a roller-shaped transport member 754a that transports the sheet piece cut by the slitter 74 toward the shredder 75a. And a motor M3a that rotationally drives the transport member 754a, and the CPU 50 controls the rotational driving speed of the transport member 754a by the motor M3a. Specifically, when the cutting length is increased, the rotational drive speed is controlled to be slowed down, and the transport speed of the sheet piece Pa is slowed down. The same can be said for the shredded portion 75b.

  As the cutting length control, the rotation driving speed control of the rotary blade or the reciprocating cycle control of the reciprocating blade described above may be combined with the conveyance speed control of the sheet piece Pa.

  FIG. 5 is a flowchart showing a control procedure of paper shredding control by the paper processing control unit 80 in the present embodiment. First, in step S <b> 1, the sheet processing control unit 80 determines whether or not the slitter mode is a mode in which the sheet is cut by the slitter 74. This determination is made based on whether or not the processing setting unit 79 is set to cut the sheet edge.

  If it is determined that it is not the slitter mode (step S1: No), the sheet processing control unit 80 ends the process. On the other hand, if it is determined that the slitter mode is set (step S1: Yes), the sheet processing control unit 80 operates the slitter 74 to cut both ends in the conveyance direction of the conveyed sheet as described above (step S2). ).

  Then, the sheet processing control unit 80 performs a process of determining the cutting length of the sheet piece when the cutting unit 75 recuts (step S3). Details of the cutting length determination process will be described later. When the cutting length of the sheet piece at the time of recutting is determined, the sheet processing control unit 80 operates the shredding unit 75 so as to cut the sheet piece according to the length determined in step S3. Control (step S4) and the process is terminated.

  In step S4, in the case of the configuration shown in FIGS. 4A and 4B, the CPU 50 controls the rotational driving speed of the rotary blade 752a by the motor M1a in the shredder 75a, thereby cutting the cutting length. Is controlling. Specifically, when increasing the cutting length, the CPU 50 performs control so as to decrease the rotational drive speed. In the case of the configuration shown in FIG. 4C, the cutting length is controlled by controlling the reciprocating period of the reciprocating blade 753a by the motor M2a. Specifically, when increasing the cutting length, the CPU 50 controls to increase the reciprocating cycle. In the case of the configuration shown in FIG. 4D, the cutting length is controlled by controlling the rotational driving speed of the conveying member 754a by the motor M3a. Specifically, when increasing the cutting length, the CPU 50 controls the rotational drive speed to be slow and the transport speed of the sheet piece Pa to be slow. The same applies to the shredded portion 75b.

  The rotational drive speed of the motor M1a corresponding to the cutting length determined in step S3 is the drop speed of the sheet piece Pa obtained in advance through experiments and the distance from the center of the rotary blade 752a to the blade 7522a. Can be based on. The rotational drive speed of the motor M1a corresponding to the cutting length may be calculated in advance, stored in the ROM 83 in association with the cutting length, and read out during the cutting length control. The same can be said for the shredded portion 75b.

  Here, the cutting length determination process in step S3 will be described. FIG. 6 is a flowchart showing the procedure of the cutting length determination process by the sheet processing control unit 80.

  The sheet processing control unit 80 first sets the cutting length to 100 mm (step S11). In the present embodiment, the length of the paper piece to be cut again by the shredder 75 is set as a minimum length of 100 mm, and the cutting length is necessary based on various conditions from the minimum length. The cutting length is determined by increasing it according to the situation. The minimum length is set because if the cutting length is too short, the paper pieces that have been recut as described above will stick to various parts due to electrostatic force, causing problems. is there.

  Next, the sheet processing control unit 80 performs correction based on humidity in the sheet processing apparatus A (step S12). Specifically, when the measurement result of the humidity detector 81 is 50% Rh or more, the cutting length is not changed, and when it is less than 50% Rh, the cutting length is increased by 50 mm.

  When the humidity in the paper processing apparatus A is low and the paper is dry, the paper pieces tend to store charges and the electrostatic force tends to increase. Therefore, by increasing the cutting length and increasing the gravity applied to the paper pieces, Thus, the sheet piece is reliably accommodated in the accommodating container 77 without sticking.

  When correction by humidity is completed, the sheet processing control unit 80 determines whether or not the cutting length is 150 mm as a result of the correction (step S13). When the trimming length is 150 mm as a result of the correction based on the humidity (step S13: Yes), the paper processing control unit 80 determines the trimming length as 150 mm (step S18), and completes the trimming length determination process. .

  In the present embodiment, the maximum length of 150 mm is set as the length of the sheet piece to be cut again by the shredding section 75, and control is performed so as not to exceed this. The maximum length is set when the length of the paper piece after recutting is too long, as described above, a wasteful space is formed in the storage container 77 and the paper piece needs to be frequently discarded. This is because problems such as the above will occur.

On the other hand, if the cutting length is not 150 mm as a result of the correction based on the humidity (step S13: No), the paper processing control unit 80 subsequently performs correction based on the amount of paper curl (step S14). Specifically, by referring to the information on the amount of sheet paper input in the processing setting unit 79, if the amount of sheet paper is 150 g / m ² or more, the cutting length is not increased and the amount of paper sheet is 150 g / m. If it is less than ² , the cutting length is increased by 10 mm.

  When the amount of paper is small, the mass is smaller when the cutting length by the shredder 75 is the same as when the amount of paper is large. When the mass is small, as described above, there is a high possibility that the sheet piece sticks to the periphery of the container 77 due to the influence of electrostatic force due to the electric charge of the sheet piece. Therefore, when the amount of paper to be cut is smaller than a predetermined value, the cutting length by the shredder 75 is increased. By increasing the cutting length, the mass of the paper piece after re-cutting is increased, and the paper piece is reliably stored in the storage container 77 without sticking.

  When the correction based on the amount of paper is completed, the paper processing control unit 80 next performs correction based on the printing rate for the paper (step S15). When the printing rate is 0% to 25%, the cutting length is not increased. When the printing rate is 26 to 50%, the cutting length is increased by 10 mm. When the printing rate is 51% to 75%, the cutting length is increased by 20 mm. When the printing rate is 76% to 100%, the cutting length is increased by 30 mm. For the printing rate, reference is made to input information in the processing setting unit 79.

  When there is a large amount of recording material such as toner adhering to the paper, the amount of electric charge of the paper piece increases, and the electrostatic force increases. Then, as described above, there is a high possibility that the sheet piece sticks to the periphery of the storage container 77 and a problem occurs. Therefore, the cutting length by the shredder 75 is increased as the printing rate of the sheet to be cut is larger. By increasing the cutting length, the mass of the paper piece after cutting by the shredder 75 increases, so that the paper piece is reliably stored in the storage container 77 without sticking.

  When the correction based on the amount of toner adhering to the paper is completed, the paper processing control unit 80 performs correction based on the length of the width perpendicular to the paper edge of the paper piece cut by the slitter 74 (step S16). Specifically, when the width of the sheet piece set in the process setting unit 79 is 21 mm to 30 mm, the cutting length is not increased. When the width of the sheet piece is 11 mm to 20 mm, the cutting length is increased by 10 mm. When the width of the sheet piece is 1 mm to 10 mm, the cutting length is increased by 20 mm.

  The shorter the width of the paper piece cut by the slitter 74, the smaller the mass when the cutting length by the shredder 75 is the same. When the mass is small, as described above, there is a high possibility that the sheet piece sticks to the periphery of the container 77 due to the influence of electrostatic force due to the electric charge of the sheet piece. Therefore, the shorter the width of the sheet cut by the slitter 74 is, the longer the cutting length by the shredder 75 is. By increasing the cutting length, the mass of the paper piece after cutting by the shredder 75 increases, so that the paper piece is reliably stored in the storage container 77 without sticking.

  When the correction based on the length of the sheet piece is completed, the sheet processing control unit 80 determines whether or not the cutting length has reached 150 mm by the correction of the cutting length performed in steps S14 to S16. (Step S17). If it is determined that the cutting length has reached 150 mm (step S17: Yes), the paper processing control unit 80 determines the cutting length to be 150 mm (step S18), and ends the process.

  On the other hand, if it is determined that the cutting length has not reached 150 mm (step S17: No), the paper processing control unit 80 next performs correction according to the type of paper (step S19). Specifically, when the paper is paper other than coated paper, the cutting length is not increased. When the paper is coated paper, the cutting length is increased by 10 mm.

  Coated paper is coated with a coating agent on its surface, and generally has a charge more easily than other paper. Therefore, as described above, there is a high possibility that the paper piece sticks to the periphery of the container 77 due to the influence of electrostatic force due to the electric charge of the paper piece. Therefore, when the coated paper is cut, the cutting length by the shredder 75 is increased. By increasing the cutting length, the mass of the paper piece after cutting by the shredder 75 increases, so that the paper piece is reliably stored in the storage container 77 without sticking.

  When the correction based on the paper type is completed, the paper processing control unit 80 completes the cutting length determination process. The cutting length at this time is a length obtained by adding all the increments in steps S14 to S16 and S19 to 100 mm.

  The above is the description of the cutting length determination process. When the cutting length is determined, the sheet processing control unit 80 returns to step S4 in FIG. 5 and controls the operation of the shredding unit 75 to cut the sheet piece so as to have the determined length.

  According to the sheet processing apparatus of the present embodiment, when the sheet pieces cut by the slitter 74 are further cut by performing the control shown in FIGS. 5 and 6, the sheet processing apparatus is suitable for the sheet to be cut and the environment. It is possible to cut to length. Thereby, it is possible to prevent the occurrence of a problem due to the paper piece after being cut again being attached to the periphery of the container 77 by electrostatic force.

  The above is the description of the first embodiment of the present invention. Next, a second embodiment of the present invention will be described with reference to the drawings. In the present embodiment, as shown in FIG. 7, the sheet processing apparatus A is connected to the image forming apparatus B and constitutes an image forming system 1000. The sheet processing apparatus A is the same as that described in the first embodiment, and a detailed description thereof is omitted.

  The image forming apparatus B is a tandem type image forming apparatus adopting an electrophotographic method, and includes a scanner unit 22, a printer unit 24, a paper feeding unit 32, an operation display unit 23, and the like.

  The scanner unit 22 includes an automatic document feeder 21, an optical system 22a, a CCD image sensor 22b, and the like.

  The printer unit 24 includes image forming units 40Y, 40M, 40C, and 40K that form toner images corresponding to the colors yellow, magenta, cyan, and black, and intermediate transfer on which the toner images formed by the image forming units are transferred. The belt 31 includes a secondary transfer unit 38 that transfers a toner image on the intermediate transfer belt 31 to a sheet, a fixing device 34 that fixes the toner image transferred to the sheet, and the like.

  The paper feed unit 32 includes paper feed trays 32 a and 32 b and the like, and appropriate paper is fed from the paper feed unit 32 at an appropriate timing.

  The operation display unit 23 includes, for example, a touch panel screen, and a user touches an icon or the like displayed on the screen to perform settings related to image formation or paper processing, an instruction to start image formation, or the like. Can do.

  When various settings are made on the operation display unit 23 and an instruction to start image formation is given, the original fed by the automatic document feeder 21 is irradiated with light, and the reflected light is emitted from the CCD image sensor. 22b is read.

  Based on the read image signal of the original, toner images of each color of yellow, magenta, cyan, and black are formed and transferred to the intermediate transfer belt 31 at the same timing so that the toner images of the respective colors overlap. The toner image transferred to the intermediate transfer belt 31 is electrostatically transferred to the sheet fed and conveyed from the sheet feeding unit 32 in the secondary transfer unit 38.

  The toner image transferred to the paper is fixed on the paper by applying heat and pressure by the fixing device 34, and an image is formed on the paper. The sheet on which the image is formed is discharged from the image forming apparatus B by the discharge roller pair 39.

  When images are formed on both sides of a sheet, when the toner image is fixed on the surface of the sheet by the fixing device 34, the sheet is conveyed toward the reverse path 33b by the branching unit 36, and the leading and trailing ends in the conveying direction are set. Inverted. The paper whose front and rear ends are reversed passes through the reverse path 33 b, and a toner image corresponding to the image formed on the back surface of the paper is transferred in the secondary transfer unit 38, and the toner image on the back surface is fixed by the fixing device 34.

  Then, the sheet on which the image is formed on the back surface is discharged from the image forming apparatus B by the discharge roller pair 39.

  The paper discharged from the image forming apparatus B is conveyed into the paper processing apparatus A by the carry-in roller pair 71. When it is set to cut both ends of the sheet in the sheet conveyance direction with respect to the sheet after image formation, the sheet conveyed into the sheet processing apparatus A is used in the first embodiment by the slitter 74. As described, both ends thereof are cut, and the cut piece of paper is further cut by the shredder 75. At this time, the cutting length when further cutting is performed by the shredding unit 75 is determined by the post-processing control unit 80 based on the sheet information and the environment information as described in the first embodiment, and the sheet piece is determined. The operation of the shredder 75 is controlled in the same manner as in the first embodiment so that it is cut to the determined length.

  On the other hand, the paper whose both ends in the transport direction are cut by the slitter 74 is further transported and discharged out of the paper processing apparatus A by the discharge roller pair 78.

  In addition, when it is not set to cut both ends in the sheet conveyance direction with respect to the sheet after image formation, the sheet carried into the sheet processing apparatus A by the carry-in roller pair 71 is conveyed by the branch unit 72. It is guided in the direction of the path b, and is directly discharged out of the sheet processing apparatus A by the discharge roller pair 78.

  FIG. 8 is a block diagram showing an electrical configuration of the entire image forming system 1000 in the present embodiment.

  The image forming apparatus B includes a scanner unit 22, a printer unit 24, a paper feed unit 32, an operation display unit 23, a CPU 50, a ROM 51, a RAM 52, an HDD 53, an I / F unit 61, an I / F unit 62, a humidity detection unit 81, and the like. It is configured.

  The CPU 50 controls the operation of each unit of the image forming apparatus B. Further, it is connected to the I / F unit 62, and it is possible to instruct the sheet processing control unit 80 to perform predetermined control via the I / F unit 82 in the sheet processing apparatus A. Yes.

  Various programs or data are stored in the ROM 51, and the CPU 50 reads out the programs or data from the ROM 51 and controls each unit of the image forming apparatus B.

  The RAM 52 is a place for temporarily storing a program or data necessary for the CPU 50 to control the operation of each unit.

  The HDD 53 is a place for storing image data and the like. Document image data read by the scanner unit 22 is stored in the HDD 53.

  The I / F unit 61 is connected to an external terminal 60, and the CPU 50 exchanges information with the terminal 60 via the I / F unit 61. Thereby, it is possible to input information related to image formation and paper processing at the terminal 60 and instruct to start image formation.

  The humidity detector 81 detects the humidity in the image forming apparatus B. In the present embodiment, the humidity detection unit 81 detects the humidity in the image forming apparatus B because the used paper is often the paper stored in the paper supply unit 32 of the image forming apparatus B. is there. However, the present invention is not limited to this, and the humidity outside the apparatus of the image forming apparatus B may be detected by the humidity detector 81 on the assumption that paper stored outside the apparatus is used.

  The sheet processing control unit 80 is connected to the image forming apparatus B via the I / F unit 82, and controls the operation of each unit of the sheet processing apparatus A based on various information and instructions transmitted from the image forming apparatus B. It is possible to control.

  In the present embodiment, the sheet processing apparatus A performs the same control as the control described with reference to FIGS. 1 to 6 in the first embodiment for the sheet on which an image is formed by the image forming apparatus B. I do.

  In this embodiment, whether or not the slitter mode is in step S1 of the flowchart shown in FIG. 5 is determined by the terminal 60 or the operation display unit 23 as a result of the image forming system 1000 with no margin for the paper. This is performed depending on whether or not the “marginless mode” in which the image is formed is selected.

  In the image forming system 1000 according to the present embodiment, when the user selects the “no margin mode”, the margin F is first left on the sheet by the image forming apparatus B as shown in FIG. Then, the image I is formed, and then the paper processing apparatus A performs processing so that the margin F is not left by cutting the paper so as to slightly cross the image I. As a result, a sheet on which an image having no margin is formed is output.

  Further, the determination in steps S14 to S16 and S19 in the flowchart shown in FIG. 6 is based on the paper size, paper type, paper weight, and image data formed on the paper, which are input at the terminal 60 or the operation display unit 23. Etc. are performed based on such information. In particular, the size of the trimming width in step S16 is determined based on the data of the paper size and the image size, and is determined.

  The cutting length determination process shown in FIG. 6 may be performed by the paper processing control unit 80 as in the first embodiment, but the CPU 50 performs the cutting length determination process and determines the determined length. As described above, the sheet processing control unit 80 may be instructed to cut the sheet piece.

  According to the image forming system 1000 in the present embodiment, image formation and cutting processing can be performed online, and a user can obtain a product on which an image having no margin is formed with a small number of operations. At this time, the paper piece cut in the paper processing apparatus A is cut again in an appropriate length according to the characteristics of the paper, the environment in the apparatus, etc., and then stored in the storage container 77. It is possible to store the paper piece in the storage container 77 and to prevent the paper piece from sticking to the periphery of the storage container 77 due to electrostatic force.

The image forming apparatus B to which the paper processing apparatus A is connected is not limited to an electrophotographic color image forming apparatus as shown in FIG. 7, and any type of image forming apparatus may be connected.
The above is the description of the second embodiment of the present invention.

  In each of the above embodiments, the cutting length when cutting the edge of the paper so as to eliminate the margin, and further cutting the cut paper piece in the shredder 75 with respect to the paper on which the image is formed. An example in which the control is performed based on paper information and environmental information has been shown. However, it is not always necessary to form an image on the paper to be cut, and the present invention can be applied even when the paper is simply cut. Further, the above-described control is not performed only when the “no margin mode” for eliminating the margin is selected, but the above-described control is appropriately performed when cutting a part including one side of the sheet. Also good.

  Further, in the cutting length determination process shown in FIG. 6, the minimum value of the cutting length is set to 100 mm and the maximum value is set to 150 mm. However, this is only an example, and is based on the shape of the storage container 77 and the like. Should be set appropriately.

  Further, in the cutting length determination process shown in FIG. 6, based on the humidity in the paper processing apparatus A, the paper weight, the paper printing rate, the width of the paper piece cut by the slitter 74, and the paper type. The cutting length was determined. However, it is not always necessary to consider all of the above conditions when determining the cutting length. The cutting length is determined in consideration of one or more of the above conditions that are considered necessary. You may do it.

  Further, in each of the above embodiments, a case where a part including both ends in the sheet conveyance direction is cut has been described as an example. However, the one including the front end in the sheet conveyance direction as illustrated in FIG. The present invention can also be applied to cutting a part including a part or a rear end part. For this purpose, a configuration that cuts a part including the front end part or the rear end part of the sheet in the conveyance direction corresponding to the slitter of the present invention, and a detailed sheet according to the present invention that further cuts a sheet piece cut by this. A configuration corresponding to the cut portion may be provided, and the control may be performed by the CPU 50 or the sheet processing control unit 80 according to the above-described procedure.

  In addition, the present invention is not limited to the above-described embodiments, and different embodiments can be adopted without departing from the present invention.

A paper processing device 71 carry-in roller pair 2 branching means 73 stopper 74 slitter 75 shredding part 76 shooter 77 container 78 discharge roller pair 79 processing setting part 80 paper processing control part 81 humidity detection part 82 I / F part 83 ROM
84 RAM
B Image forming apparatus 22 Scanner section 23 Operation display section 24 Printer section 31 Intermediate transfer belt 32 Paper feed section 38 Secondary transfer section 39 Discharge roller pair 40 Image forming means (YMCK)
50 CPU
60 Terminal 61 I / F unit 62 I / F unit 1000 Image forming system S1 Sensor

Claims (17)

A first cutting unit that cuts the recording medium into a part including one side of the recording medium and the other;
A second cutting unit for cutting a part including one side of the recording medium cut by the first cutting unit so as to cross the one side and a side opposite to the one side;
A storage container for storing the recording medium cut by the second cutting unit;
Information acquisition means for acquiring either or both of information relating to the recording medium and information relating to the environment surrounding the paper processing apparatus;
A cutting length determination unit that determines a length in a direction along the one side including a side of the recording medium after cutting by the second cutting unit based on the information acquired by the information acquisition unit;
Control means for controlling the second cutting part to cut a part including one side of the recording medium so that the length in the direction along the one side becomes the length determined by the cutting length determination means. And a paper processing apparatus. The information acquisition unit acquires, as information about the recording medium, information about a length in a direction perpendicular to the one side including a side of the recording medium after cutting by the first cutting unit. The sheet processing apparatus according to claim 1. The sheet processing apparatus according to claim 1, wherein the information acquisition unit acquires information about a type of the recording medium as information about the recording medium. The paper processing apparatus according to claim 1, wherein the information acquisition unit acquires information regarding a recording material attached to the recording medium as information regarding the recording medium. 5. The sheet processing apparatus according to claim 1, wherein the information acquisition unit acquires information relating to the amount of recording medium as information relating to the recording medium. The paper processing apparatus according to claim 1, wherein the information acquisition unit acquires information about humidity around the paper processing apparatus as information about an environment in the paper processing apparatus. . The second cutting portion includes a rotary blade that is rotatably supported;
A rotation drive unit for rotating the rotary blade in the previous period,
The said control part controls the rotational speed of the said rotary blade by the said rotational drive part according to the length determined by the said cutting length determination means, The any one of Claims 1-6 characterized by the above-mentioned. The paper processing apparatus according to 1. The second cutting part includes a reciprocating blade supported so as to be reciprocally movable;
A reciprocating drive unit for reciprocating the reciprocating blade, and
The said control part controls the period of the reciprocating motion of the said reciprocating blade by the said reciprocating drive part according to the length determined by the said cutting length determination means, The any one of Claims 1-6 characterized by the above-mentioned. The sheet processing apparatus according to one item. Conveying means for conveying a part including one side of the recording medium cut by the first cutting unit to the second cutting unit;
The sheet processing apparatus according to claim 1, wherein the control unit controls the transport unit to control a part of the transport speed including one side of the recording medium. 2. The cutting length determining means determines a length in a conveyance direction of a recording medium to be cut by the second cutting unit so as not to be shorter than a predetermined first length. The paper processing apparatus as described in any one of -9. The cutting length determination unit determines a length in a conveyance direction of a recording medium cut by the second cutting unit so as not to be longer than a predetermined second length that is longer than the first length. The paper processing apparatus according to claim 10. The first cutting unit cuts the recording medium into a part including one side in a direction along the conveyance direction of the recording medium and the other part. The paper processing apparatus as described. An image forming apparatus for forming an image on a recording medium;
A sheet processing apparatus according to any one of claims 1 to 12, connected to the image forming apparatus.
The image forming system, wherein the first cutting unit cuts a recording medium on which an image is formed by the image forming apparatus. Margin mode setting means capable of setting so as to eliminate the margin of the image formed by the image forming apparatus;
The control unit controls the first cutting unit to cut the recording medium inside the edge of the formed image when the margin mode setting unit is set to eliminate the margin. The image forming system according to claim 13. 15. The image forming system according to claim 13, wherein the control unit is provided for the image forming apparatus. The image forming system according to claim 13, wherein the information acquisition unit is provided for the image forming apparatus. The image forming system according to claim 13, wherein the cutting length determination unit is provided for the image forming apparatus.

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