JP2005335881A - Sheet post-processing device and image forming device with it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet post-processing device equipped not only with the cutting function as conventional but also a manual cutting function to make cutting selectively. <P>SOLUTION: A sheet cutting device B is furnished with a transporting/aligning unit to supply a sheet bundle P3, an ejection hole 210 to eject the sheet bundle cut by a trimmer unit D for cutting the sheet bundle, transport belts 309, 310, 320, 321 whereby the sheet bundle is carried into the trimmer unit from the transporting/aligning unit and ejected from the ejection hole and also the sheet bundle supplied from the ejection hole is carried into the trimmer unit, and a CPU able to selectively execute the normal cutting mode in which the sheet bundle supplied from the transporting/aligning unit is cut by the trimmer unit and ejected from the ejection hole by the transporting/aligning unit and the manual cutting mode in which the sheet supplied from the ejection hole is cut by the trimmer unit and ejected from the ejection hole by the transporting/aligning unit. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, even if a sheet to be cut is inserted from a discharge port from which a sheet, a sheet bundle or the like (hereinafter referred to as “sheet to be cut”) cut by the cutting means is discharged, the sheet to be cut is cut by the cutting means. The present invention relates to a sheet post-processing apparatus capable of cutting, and an image forming apparatus including the sheet post-processing apparatus in an apparatus main body.

  2. Description of the Related Art Conventionally, a sheet post-processing apparatus that includes a cutting unit that cuts a sheet to be cut may be provided as one of the components of the image forming apparatus in the apparatus main body of the image forming apparatus. The sheet post-processing apparatus forms a bundle of sheets discharged from the apparatus main body of the image forming apparatus, and performs processing such as glue binding or saddle stitch bookbinding on the sheet bundle, and then uses a cutting unit. There is a technique in which an end face of a bookbinding sheet bundle is cut and the end face is aligned (see Patent Document 1). The sheet post-processing apparatus can cut even a single sheet.

  Examples of the image forming apparatus include a copying machine, a printer, a facsimile, and a complex machine of these.

JP 2000-198613 A

  However, the conventional sheet post-processing apparatus can cut only the cut sheet sent from the main body of the image forming apparatus. Therefore, the conventional sheet post-processing apparatus cannot perform the retry process for selectively performing the cutting process again on the cut sheet discharged from the sheet post-processing apparatus. Further, any sheet to be cut that does not go through the image forming apparatus main body or the sheet post-processing apparatus cannot be directly cut by the cutting means.

  Therefore, the present invention provides a sheet post-processing apparatus that has a manual cutting function that selectively performs cutting processing in addition to the conventional cutting processing function, and that can retry a cut sheet that has been cut. It is aimed.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet cutting apparatus that can perform a cutting process with a single apparatus.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming apparatus having a sheet post-processing apparatus having a manual cutting function in an apparatus main body and having a wider range of use.

  In order to achieve the above object, a sheet post-processing apparatus of the present invention is cut by a supply unit that supplies a cut sheet such as a sheet or a sheet bundle, a cutting unit that cuts the cut sheet, and the cutting unit. A discharge port through which the cut sheet is discharged, and a conveying unit that carries the cut sheet supplied from the supply unit into the cutting unit and discharges the cut sheet cut by the cutting unit from the discharge port. And control means for controlling the cutting means and the conveying means, and the conveying means is capable of carrying the cut sheet supplied from the discharge port into the cutting means, and the control means comprises: The cut sheet supplied from the supply unit is carried into the cutting unit by the conveying unit and cut by the cutting unit, and then discharged from the discharge port by the conveying unit. A normal cutting mode, and a manual cutting mode in which a sheet to be cut supplied from the discharge port is carried into the cutting unit by the conveying unit and cut by the cutting unit, and then discharged from the discharge port by the conveying unit. And can be selectively executed.

  The sheet post-processing apparatus of the present invention includes a detection unit that detects a cut sheet supplied from the discharge port, and the control unit executes the manual cutting mode when the detection unit detects the cut sheet. Therefore, the conveying means and the cutting means are controlled.

  The sheet post-processing apparatus of the present invention includes a storage unit that stores a cutting width of the cut sheet by the cutting unit, and the control unit includes the conveying unit and the cutting unit in the manual cutting mode. By controlling, the cutting means is made to cut the cut width.

  The sheet post-processing apparatus of the present invention includes guide means that is disposed at a position different from the discharge port and guides the cut sheet to the supply means, and the control means is the cut sheet guided by the guide means. Is cut by the cutting means based on the normal cutting mode.

  The sheet post-processing apparatus of the present invention is provided with a conveyance alignment unit that bundles sheets to be fed to the cutting unit.

  In order to achieve the above object, an image forming apparatus according to the present invention includes an image forming unit that forms an image on a sheet, a sheet on which an image is formed by the image forming unit, and a sheet to be cut such as a sheet bundle. Or a sheet post-processing apparatus according to any one of the above.

  In order to achieve the above object, an image forming apparatus of the present invention includes an image forming unit that forms an image on a sheet, and a supply unit that supplies a sheet to be cut such as a sheet on which an image is formed by the image forming unit or a sheet bundle. A cutting means for cutting the cut sheet, a discharge port through which the cut sheet cut by the cutting means is discharged, and the cut sheet supplied from the supply means is carried into the cutting means, A conveyance unit that discharges the cut sheet cut by the cutting unit from the discharge port; and a control unit that controls the cutting unit and the conveyance unit. The conveyance unit is supplied from the discharge port. The cut sheet that has been cut can also be carried into the cutting means, and the control means carries the cut sheet supplied from the supply means into the cutting means by the conveying means. A normal cutting mode in which the sheet is cut by the cutting unit and then discharged from the discharge port by the conveying unit, and the sheet to be cut supplied from the discharge port is carried into the cutting unit by the conveying unit and is cut by the cutting unit. After cutting, it is possible to selectively execute a manual cutting mode of discharging from the discharge port by the transport means.

  In the sheet cutting apparatus of the present invention, the conveying unit can not only carry the cut sheet supplied from the supply unit into the cutting unit, but also carry the cut sheet supplied from the discharge port into the cutting unit. Since the control means can selectively execute the normal cutting mode and the manual cutting mode, when the sheet to be cut is supplied from the discharge port, the control means A cutting mode is selected, and based on this mode, the cutting means and the conveyance and transfer means are controlled, and the cut sheet can be cut again, so that the cut sheet can be cut reliably. Further, any cut sheet can be directly cut, and the range of use of the apparatus can be expanded.

  The sheet cutting apparatus of the present invention can supply a sheet to be cut from the discharge port and cut the sheet, so that the sheet cutting apparatus can be used alone regardless of whether or not the apparatus main body of the image forming apparatus is equipped.

Since the sheet cutting apparatus of the present invention can also cut the sheet to be cut inserted into the sheet guiding means, the sheet to be cut can be continuously inserted into the sheet guiding means for continuous cutting. Furthermore, when the cut sheet inserted in the sheet guiding means can be cut,
The image forming apparatus can be used in a single state that is not installed in the apparatus main body.

  Since the image forming apparatus of the present invention includes a sheet post-processing apparatus that can cut the cut sheet again, sheets to be cut other than the sheet to be cut fed from the apparatus main body to the sheet post-processing apparatus are also provided. Since it can be cut by the post-processing device, the range of use can be expanded.

  The image forming apparatus according to the present invention includes an image forming unit that forms an image on a sheet, a supply unit that supplies a sheet to be cut such as a sheet on which an image is formed by the image forming unit, a sheet bundle, and the cut sheet. A cutting means for cutting, a discharge port through which the cut sheet cut by the cutting means is discharged, and the cut sheet supplied from the supply means are carried into the cutting means and cut by the cutting means A conveyance unit that discharges the cut sheet from the discharge port; and a control unit that controls the cutting unit and the conveyance unit. The conveyance unit also includes the cut sheet supplied from the discharge port. The control means can carry the sheet to be cut supplied from the supply means into the cutting means by the conveying means and cut by the cutting means. After the normal cutting mode for discharging from the discharge port by the transport unit, and the cut sheet supplied from the discharge port is carried into the cutting unit by the transport unit and cut by the cutting unit, A manual cutting mode of discharging from the discharge port by the conveying means can be selectively executed.

  A sheet cutting device that is an example of a sheet post-processing apparatus according to an embodiment of the present invention, and a copying machine that is an example of an image forming apparatus that includes this sheet cutting device as one of the components in the apparatus main body are illustrated on the basis of the drawings. explain. In addition, the numerical value taken up by this embodiment is a reference numerical value, Comprising: This invention is not limited.

  Examples of the image forming apparatus include a copying machine, a printer, a facsimile machine, and a multifunction machine of these, and the image forming apparatus is not limited to the copying machine. Further, the sheet post-processing apparatus is not provided only in the apparatus main body of the copying machine. You may provide in apparatus main bodies, such as a printer, a facsimile, and a multifunctional machine.

  A sheet cutting apparatus, which is an example of a sheet post-processing apparatus, is configured to cut a single sheet, a sheet bundle, or the like (hereinafter referred to as a “sheet to be cut”). The sheet cutting apparatus of the present embodiment has a function of cutting three sides other than the glued and bound sheet bundle, but may cut at least one side. Further, the sheet bundle is not necessarily glued.

  The sheet cutting device B is provided on the side of the apparatus main body A of the copying machine G, but may be incorporated in the apparatus main body A.

  Further, the apparatus main body A of the copying machine is provided with a control unit 9 for controlling the apparatus main body A, and the sheet cutting apparatus transmits and receives data, control signals and the like with the control unit 9 of the apparatus main body A, A central processing unit (hereinafter referred to as “CPU”) 200 for controlling the sheet post-processing apparatus is provided. However, the control unit 9 and the CPU 200 are integrally formed, and the apparatus main body A and the sheet are integrated with each other. You may control a cutting device.

[Overall configuration of copier]
FIG. 1 is a schematic front cross-sectional view of a copying machine which is an example of an image forming apparatus provided with a sheet cutting device according to an embodiment of the present invention. The apparatus main body A of the copying machine G optically reads a document automatically fed from a document feeding apparatus 1 mounted on the upper portion of the apparatus by a scanner unit 2 and uses the information as a digital signal as an image forming means, for example, an image It is transmitted to the forming unit 3 and recorded on a sheet such as plain paper or an OHP sheet.

  A plurality of sheet cassettes 4 storing sheets of various sizes are provided in the lower part of the apparatus main body A of the copying machine G so that they can be pulled out (only one is shown in the figure, and the others are omitted). The sheet conveyed by the conveyance roller 5 from the sheet cassette 4 is recorded on the image forming unit 3 by an electrophotographic method.

  That is, the apparatus main body A forms a latent image by irradiating the photosensitive drum 3b with a laser beam from the light irradiation unit 3a based on the information read by the scanner unit 2, and develops the toner image onto the sheet. . Thereafter, the apparatus main body A conveys the sheet to the fixing unit 6 and heat-presses the sheet to permanently fix the toner image on the sheet. Then, the apparatus main body A sends the sheet to the sheet cutting apparatus B as it is in the single-sided recording mode in which a toner image is formed on one side of the sheet. In the double-sided recording mode in which the toner image is formed on both sides of the sheet, the apparatus main body A switches back the sheet on which the image is recorded on one side, and then conveys the sheet to the retransmission path 7 again. The sheet is conveyed to the image forming unit 3 to form an image on the other side, and then sent to the sheet cutting apparatus B. The apparatus main body A sends a signal such as a sheet size to the sheet cutting apparatus B before sending the sheet to the sheet cutting apparatus B, and causes the sheet cutting apparatus B to switch a path in the sheet cutting apparatus B in advance.

  The sheet can be fed not only from the sheet cassette 4 but also manually from the multi-tray 8.

  As shown in FIG. 2, for example, a sheet cutting apparatus B that is a sheet post-processing apparatus is configured by a conveyance alignment unit C that is a supply unit and a conveyance alignment unit, and a trimmer unit D that is a cutting unit, for example. In addition to the normal discharge mode, glue binding and cutting can be selectively performed, and three sides other than the glued side of the sheet bundle can be cut. Note that the sheet cutting apparatus B does not necessarily require the conveyance alignment unit C. It may only be possible to cut the sheet bundle.

  In the normal mode, the sheet P discharged from the apparatus main body A of the copying machine G to the sheet cutting apparatus B is transported to the transport roller pairs 10a, 10b, 10c, and 10d and is discharged to the stack tray 11. In the glue binding mode, the sheet P is discharged to the stacking tray E after being subjected to a predetermined process described later.

[Loading on the alignment vertical path]
In the bookbinding mode, the sheet P discharged from the apparatus main body A is fed to the bookbinding paper path 14 by the guidance of the first flapper 12 and the second flapper 13. The first flapper 12 switches between the non-sort path 15 and the cover path 16. The second flapper 13 switches between the bookbinding middle paper path 14 and the cover paper path 16.

  After the sheet P conveyed by the conveying roller pair 10a, 17a, 17b is discharged to the alignment vertical path 35 by the discharge roller pair 18, the trailing edge of the sheet P is made the trailing edge stopper 20 by the half moon roller 19 and the discharge roller pair 18. The sheet is returned to the contact position and aligned in the sheet conveying direction (rear end alignment). Then, the sheet P is pushed toward the sheet center by the aligning plate 21 and is aligned in a direction intersecting the sheet conveying direction. That is, the sheet P is pushed in the center direction in the width direction of the sheet (direction intersecting the sheet conveyance direction), and the side edges of the sheets are aligned.

  When the trailing edge of the sheet P passes through the discharge roller pair 18, the rotation speed of the discharge roller pair 18 is controlled to be low. Thus, the sheet P discharged to the alignment vertical path 35 is reliably drawn into the alignment vertical path 35 by the rotation of the half-moon roller 19 so that the trailing edge alignment is performed reliably.

  When a predetermined time has passed after the trailing edge of the sheet has passed the discharge sensor 22 or when the rotation speed of the motor reaches a predetermined rotation speed, it is considered that the sheet has passed the discharge roller pair 18. .

[Half Moon Roller]
Next, the meniscal roller 19 that pulls back the sheet P discharged onto the alignment vertical path 35 in the direction opposite to the discharge direction will be described.

  As shown in FIG. 3, the half-moon roller 19 is formed in a shape cut out in a half-moon shape. The half-moon roller 19 normally has a cutout portion of the half-moon roller 19 on the alignment vertical path 35 side so as not to prevent the discharge of the sheet P discharged from the discharge roller pair 18. The half-moon roller 19 rotates in the direction opposite to the sheet discharge direction of the discharge roller pair 18 every time one sheet P is discharged onto the alignment vertical path 35, and the trailing edge of the sheet P on the alignment vertical path 35. The sheet P is pulled back by the frictional force generated between the sheet P and the sheet P. That is, the half-moon roller 19 pulls back the sheet P in the direction in which the sheet P falls.

[Alignment vertical path board]
The alignment vertical path plate 36 can be moved in the direction of the arrow a shown in FIG. 3 by an alignment vertical path motor (not shown), and the path interval of the alignment vertical path 35 is adjusted. The alignment vertical path plate 36 keeps the contact pressure with respect to the uppermost sheet discharged on the alignment vertical path 35 by the half-moon roller 19 in accordance with the number of sheets discharged on the alignment vertical path 35. The alignment vertical path plate 36 is moved in the direction in which the path spreads.

[Operation timing of half-moon roller]
The operation timing of the half-moon roller 19 is after the discharge roller pair 18 releases the trailing edge of the sheet P. Specifically, the half-moon roller 19 rotates in the direction opposite to the sheet discharge direction after a predetermined time has elapsed after the trailing edge of the sheet P passes the discharge sensor 22 provided on the upstream side of the discharge roller pair 18. It has become.

[Cover path]
The sheet P discharged from the apparatus main body A is guided to the cover path 16 by the first flapper 12 and the second flapper 13. As shown in FIGS. 2 and 4, a registration roller pair 23 and a registration leading edge sensor 23 a located upstream of the registration roller pair 23 are disposed in the middle of the cover path 16. The registration roller pair 23 is stopped when the cover sheet P2 is guided to the cover path 16, but starts rotating after a predetermined time after the front end of the cover sheet P2 contacts the registration roller pair 23. Whether or not the front end of the cover sheet P2 has come into contact with the registration roller pair 23 is determined for a predetermined time after the cover sheet P2 passes the registration front end sensor 23a or by detecting the motor rotation speed. Yes. By controlling the registration roller pair 23 to stop, a loop can be formed at the front end of the cover sheet P2 guided to the cover path 16 to correct the skew.

  The registration roller pair 23 can be moved in a direction perpendicular to the sheet conveying direction (crossing direction, sheet width direction) by a cover motor 37 and a rack 38. The registration roller pair 23 moves in the direction of the arrow b in FIG. 4 in a state where the registration roller pair 23 sandwiches and conveys the cover sheet P2 after the rear end of the cover sheet P2 has passed through the conveyance roller pair 17a. After the light is shielded, it moves in the direction of the arrow c to open the registration sensor 24, and then moves a certain amount and stops. Since the registration sensor 24 is disposed at the sheet end position (side end position) of the sheet bundle P1 in the alignment vertical path 35, the registration sheet 24 and the sheet bundle in the alignment vertical path 35 are located in the cover path 16. P1 moves to a position that is deviated by a certain amount in the direction perpendicular to the sheet conveyance direction (the intersecting direction, the width direction of the sheet or sheet bundle). The registration roller pair 23 receives the paper size signal from the apparatus main body A, stops the cover sheet P2 in the cover path 16 by conveying a specified amount according to the paper size.

[Gripper]
The gripper 41 is located below the alignment vertical path 35 and has a function of gripping the sheet bundle P1 stacked on the alignment vertical path 35 and guiding it to the cover sheet P2.

[Glued unit]
FIG. 5 is a schematic plan view of the pasting unit 25. As shown in FIG. 5, the gluing unit 25 includes a gutter 25a, a gluing roller 25b, a gluing 25c, a gutter heater 25d, a shaft 25e, a gutter driving unit 25f, and the like.

  The eaves 25a are moved by the eaves drive unit 25f in the sheet width direction perpendicular to the sheet conveying direction along the shaft 25e so as to move more than the sheet width. The lower edge side is the retracted position. As the collar 25a moves from the first retracted position to the second retracted position, a part of the link 26 engaged with the rear end stopper 20 is pushed by a part of the collar 25a so that the rear end stopper 20 is illustrated. The sheet bundle P1 is moved away from the lower part of the sheet bundle P1. The glue roller 25b is attached to the collar 25a, and rotates with the movement of the collar 25a.

  The saddle heater 25d is attached to the outside of the saddle 25a. The scissors heater 25d heats the scissors 25a and melts the glue 25c in the scissors 25a at the start of the bookbinding mode. The glue roller 25b is rotated by the movement of the collar 25a by the collar drive unit 25f, and the glue 25c melted over the entire outer peripheral surface of the glue roller 25b is spread.

  The sheet bundle P1 stacked in the alignment vertical path 35 is held by the gripper 41, the collar 25a moves from the first retracted position to the second retracted position, and the trailing end stopper 20 is moved from the lower part of the sheet bundle P1. By retracting, the glue 25c is applied to the lower end surface of the sheet bundle P1 by the glue unit 25.

[Bookbinding process]
As shown in FIG. 6A, the shutter path 27 is located downstream of the cover path 16 (see FIG. 2), and closes the cover path 42 when the cover sheet P2 is being conveyed.

  During the bookbinding process, as shown in FIG. 6B, the shutter motor 28 drives the shutter rack 29, and the shutter path 27 and the spring 30 that pulls the shutter rack 29 in one direction are connected to the cover attachment path. 42 is moved to the opening position. The shutter path 27 having opened the cover attachment path 42 comes into contact with a stopper (not shown) and stops.

  The sheet bundle P1 held by the gripper 41 is coated with the glue 25c by the above-mentioned glue unit 25. Thereafter, the gripper 41 moves the glued sheet bundle P1 so as to come into pressure contact with the cover sheet P2 on the crease table 34, thereby bringing the sheet bundle P1 into pressure contact with the cover sheet P2.

  Next, as shown in FIG. 6C, when the shutter motor 28 is further driven, the cam 32 rotated by the belt 31 from the shutter motor 28 is further rotated, and the creasing tables 34 and 34 are moved by the guide shaft 33. Move them closer together. The crease table 34 performs crease for a certain time. Thereby, the bookbinding sheet bundle P3 is completed.

  The crease table 34 is provided with a relief mechanism so as to cope with a change in the paper thickness. Further, as shown in FIG. 6 (d), the creasing bases 34 and 34 are retracted away from each other by continuing to rotate the cam 32. As a result, the bookbinding sheet bundle P3 is pushed downstream by the push rollers 39 and conveyed to the bundle curvature path 40 (see FIG. 2).

[Buffer mechanism]
A buffer mechanism 50 that temporarily retracts the sheet P conveyed from the apparatus main body A of the copying machine G during post-processing of sheets such as glue binding will be described. As shown in FIGS. 3 and 7, the receiving base 50a for receiving the sheet of the buffer mechanism 50 moves in the same direction and the perpendicular direction (the intersecting direction and the sheet width direction) with respect to the sheet conveying direction. It is supposed to be. In FIG. 7, it is assumed that the discharge roller pair 18, the half moon roller 19, the rack 50e, and the photosensor 50f do not move.

  In order to move the cradle 50a in the same direction as the sheet conveying direction, first, only the electromagnetic clutch gear 50c is set in a rotational force transmitting state so that the rotation of a motor (not shown) is transmitted to the gear 50d. Then, the gear 50d rolls and rotates on the fixed rack 50e. As a result, the respective parts of the buffer mechanism 50 excluding the rack 50e are integrally moved in the same direction as the sheet conveying direction. That is, the cradle 50a moves in the same direction as the sheet conveying direction. At this time, detection of the movement position in the same direction as the sheet conveyance direction of the buffer mechanism 50 excluding the rack 50e is detected by the photosensor 50f and the protrusion 50k on the moving body 50n that shields the photosensor 50f. The movement control based on the set position is performed.

  Further, in order to move the cradle 50a in a direction perpendicular to the sheet conveying direction (crossing direction, sheet width direction), only the electromagnetic clutch gear 50g is set in the rotational force transmitting state, and the rotation of the motor is shifted to the gear 50h. The rack 50b is moved. As a result, the cradle 50a moves in a direction perpendicular to the sheet conveying direction. At this time, the moving position of the cradle 50a in the direction perpendicular to the sheet conveying direction by the photosensor 50i provided on the moving body 50n and the protrusion 50m protruding from one end of the rack 50b that shields the photosensor 50i. And movement control based on the detected position are performed. The cradle 50a of the buffer mechanism 50 is retracted to the home position outside the width of the sheet P in FIG. 7 except when the sheet P is buffered, so that it does not hinder the conveyance of the sheet. ing.

  The basic operation of the buffer mechanism 50 will be described. As shown in FIG. 3, when the sheet bundle P <b> 1 is stacked and aligned with the trailing end stopper 20 and is in the alignment vertical path 35 and is not discharged from the alignment vertical path 35, the buffer mechanism 50 continues from the apparatus main body A. In order to buffer the sheet P being conveyed, the cradle 50a is moved from the home position that does not prevent the conveyance of the sheet P to the position where the sheet P is received by the rotation of the gear 50h and the movement of the rack 50b shown in FIG. Move the slide.

  When the sheet bundle P1 is discharged from the alignment vertical path 35 and the sheet bundle P1 is no longer on the trailing edge stopper 20, the buffer mechanism 50 moves the receiving base 50a toward the sheet conveying direction and the downstream side, and toward the trailing edge stopper 20. Move. When the rear end of the buffered sheet P is supported by the rear end stopper 20, the buffer mechanism 50 stops the movement of the cradle 50a and retracts the cradle 50a to the home position. The buffer mechanism 50 repeats the above operation until the target number of bookbinding copies is completed.

[Rotating stage]
Next, the rotation stage 301 that rotates the bound bookbinding sheet bundle P3 and conveys it into the trimmer unit D will be described with reference to FIGS.

  As shown in FIG. 8A, the second and fourth conveyor belts 310 and 321 of the bundle conveyance unit 302 in the rotation stage 301 are wound by a lifting gear 304 that is rotated by a lifting motor 303 to wind a wire 305. When the protrusion 302a of the transport unit 302 is detected by the protrusion detection sensor 306 after being rotated about the rotation shaft 315, the elevating motor 303 is stopped and is kept waiting at the position shown in FIG. .

  The first conveying belt 309, the second conveying belt 310, the third conveying belt 320, and the fourth conveying belt 321, the bookbinding sheet bundle P3 bound in the bookbinding process is conveyed by the bundle conveying roller pair 307, and the bookbinding sheet bundle P3. When the leading end of the belt is detected by the passage sensor 308, the conveyor belt motor F322 and the conveyor belt motor R323 rotate to circulate in the arrow direction.

  The second and fourth conveyor belts 310 and 321 of the bundle conveyance unit 302 pass the passage sensor 308 at the rear end of the bookbinding sheet bundle P3 conveyed into the conveyance path 311 of the bundle conveyance unit 302 by the bundle conveyance roller pair 307. When the lifting / lowering motor 303 rotates in the reverse direction, it tilts to the position shown in FIG. At this time, when the protrusion detection sensor 312 detects the protruding portion 302a of the bundle conveying unit 302, the rotation of the elevating motor 303, the conveying belt motor F322, and the conveying belt motor R323 is stopped, and the bookbinding sheet bundle P3 is transferred to the conveying belt 310, 321 and the weight roller 314 at the tip of the weight 313 are put on standby.

  At this timing, the alignment plate F324 and the alignment plate R316 are operated by a motor (not shown), and the bookbinding sheet bundle P3 is positioned and aligned on the alignment plate R316 side. When the bookbinding sheet bundle P3 at this time is bound by the alignment vertical path 35 and the cover path 16, the cover sheet may be shifted and may be bound, but is positioned with high accuracy on the alignment plate R316 side. At the same time, the abutting plate 318 that circulates the timing belt 317 by the conveyance motor 110 and is fixed to the timing belt 317 moves from the position of the sheet detection sensor 319 to the designated position, and moves the bookbinding sheet bundle P3 to the trimmer unit. Transport into D. At this time, the bookbinding sheet bundle P3 is conveyed while its three sides are regulated by the alignment plate F324, the alignment plate R316, and the butting plate 318, so that the conveyance position accuracy to the trimmer unit D can be improved.

  When cutting of the sheet bundle is started in the trimmer unit D, the alignment plate F324, the alignment plate R316, and the abutting plate 318 move to the home position and stand by. When the cutting of the sheet bundle is completed by the trimmer unit D, the conveyor belts 309, 310, 320, and 321 circulate counterclockwise in FIG. The bookbinding sheet bundle P3 sandwiched between the weight rollers 314 is conveyed to a position where the weight rollers 314 are located near the center of the surface of the bookbinding sheet bundle P3. When the center of the sheet bundle P3 and the weight roller 314 coincide with each other, the conveying belts 309, 310, 320, and 321 stop circulating.

  Thereafter, the conveying belts 309 and 310 and the conveying belts 320 and 321 circulate in opposite directions as indicated by arrows in FIG. 9, whereby the bookbinding sheet bundle P3 is rotated 90 degrees around the weight roller 314. When the bookbinding sheet bundle P3 rotates 90 degrees, the conveyance belts 309, 310, 320, and 321 stop circulating. Then, the alignment plate F324 and the alignment plate R316 and the abutting plate 318 align the bookbinding sheet bundle P3 again. Thereafter, the abutting plate 318 conveys the bookbinding sheet bundle P3 to a predetermined position in the trimmer unit D and causes the trimmer unit D to perform cutting. At this time, the edge of the bookbinding sheet bundle P3 that is different from the previous one is cut.

  Thereafter, the bundle conveying unit 320 conveys the bookbinding sheet bundle P3 to the weight rollers 314 by the same operation, and then rotates the sheet bundle P3 by 180 degrees and again conveys it into the trimmer unit D to be cut by the trimmer unit D. Thereby, the cutting of the three sides of the bookbinding sheet bundle P3 is completed. The bookbinding sheet bundle P3 that has been cut is transported to the weight rollers 314 by the transport belts 309, 310, 320, and 321 and the transport belts 309 and 310 and the transport belts 320 and 321 circulate in opposite directions. After being rotated 90 degrees, the conveyor belts 309, 310, 320, and 321 are conveyed to the stacking tray E by circulation in the direction of the arrow in FIG. At the same time, the timing belt 317 is also circulated, the butting plate 318 is rotated once in the direction of the arrow, the rear end portion of the bookbinding sheet bundle P3 is pushed, and the bookbinding sheet bundle P3 is reliably discharged to the stacking tray E. Whether or not the bookbinding sheet bundle P3 has been discharged is detected by a sheet detection sensor 319.

[Trimmer unit]
The trimmer unit D will be described with reference to FIGS. 2 and 10 to 13. For example, the trimmer unit D, which is a cutting means, performs cutting on three sides excluding the glued end face of the sheet bundle subjected to glue binding by the glue unit 25 for the purpose of finishing the sheet bundle with higher quality. It has become.

  FIG. 11 is a schematic diagram of the trimmer unit D. The trimmer unit D includes, for example, a cutting blade 81 that is a tool with a blade for cutting the bookbinding sheet bundle P3. As shown in FIGS. 11A and 11B, the cutting blade 81 is formed in a plate shape or a disk shape, and is inclined only on one side. The length of the plate-shaped cutting blade 81 in the longitudinal direction is longer than the maximum sheet size to be cut, and further moves in the longitudinal direction, so that the plate-shaped cutting blade 81 always has a length to ride on the bookbinding sheet bundle P3. For example, if the maximum sheet size is cut in the longitudinal direction of A4, the length of the plate-like cutting blade 81 is equal to or longer than the length obtained by adding the moving distance of the cutting blade 81 to 297 mm.

  The movement in which the cutting blade 81 cuts the sheet is an operation of cutting while reciprocating in parallel with the cut surface of the bookbinding sheet bundle. A similar movement is like cutting a tree with a saw.

  As shown in FIG. 10, the cutting blade 81 is provided so as to be replaceable with a longitudinal movement member 82 that can slide only in parallel with the cut surface of the bookbinding sheet bundle P3. Whether or not the cutting blade 81 has been replaced is detected by a blade replacement sensor 113 provided on the longitudinal movement member 82. The blade replacement sensor 113 that detects the replacement of the cutting blade 81 transmits a replacement signal to the CPU 200 described later. The cutting blade 81 is replaced by removing the bolt 114.

  The longitudinal movement member 82 is supported by the vertical movement member 88 by rollers 83a and 83b. The longitudinal movement member 82 is guided by the rollers 83a and 83b provided on the vertical movement member 88 and the abutments 84a and 84b formed on the longitudinal movement member 82 itself. It moves in the direction parallel to the cut surface of the bookbinding sheet bundle P3. The longitudinal movement of the longitudinal movement member 82 is such that when the cutting blade drive motor 85 rotates, the rotation cam 86 rotates, and the length formed on the protrusion 86a of the rotation cam 86 and the longitudinal movement member 82 itself. By the engagement of the hole with the rotation receiver 87, the rotational movement of the cutting blade drive motor 85 is converted into a linear reciprocating movement. The speed adjustment of the reciprocating motion can be freely performed by providing the cutting blade drive motor 85 with an encoder.

  The cutting blade 81 is moved by the vertical moving member 88 in the thickness direction of the bookbinding sheet bundle P3. The vertical moving member 88 is guided by the guide shaft 106 protruding from the vertical moving member 88 and the guide groove 107 formed in the columns 89a and 89b provided on the base 105, and along the columns 89a and 89b. It moves and approaches and separates from the bookbinding sheet bundle P3. The interval between the columns 89a and 89b is set longer than the width of the bookbinding sheet bundle P3 and longer than the reciprocating distance of the cutting blade 81. Since the vertical movement member 88 includes rollers 83a and 83b that support the longitudinal movement member 82, when the vertical movement member 88 itself moves vertically, the longitudinal movement member 82 also moves vertically. The cutting blade 81 also moves in the vertical direction. Further, the vertical moving member 88 is always pulled by the tension springs 90a and 90b in the direction of approaching the bookbinding sheet bundle P3 via the vertical moving member 88 in order to apply a load (cutting force) to the cutting blade 81.

  As shown in FIG. 13A, the sheet presser 104 comes into contact with the bookbinding sheet bundle P3 when the cam 99 is rotated by the rotation of the vertical motor 108 and the link 100 is moved to a position near the lower fulcrum position. The bookbinding sheet bundle P3 is pressed against the mat 91 by the further pressing force of the link 100 against the spring 101. While the link 100 moves to the lower fulcrum position, the attachment member 109 of the link 100 moves away from the abutting piece 88a of the vertical movement member 88, and the cutting blade 81 is pulled by the tension springs 90a and 90b via the vertical movement member 88. The bookbinding sheet bundle P3 is pressed.

  Thus, the mechanism for operating the sheet presser 104 and the cutting blade 81 is as shown in FIG. 13B, in which the cam 99 rotates and the link 100 moves to the upper fulcrum position. When releasing the bookbinding sheet bundle P3, the attachment portion 109 of the link 100 abuts against the abutting piece 88a of the vertical moving member 88, and the cutting blade 81 is made to have a thickness of the bookbinding sheet bundle P3 via the vertical moving member 88. It also serves as a mechanism for moving the direction upward. By these mechanisms, the cutting blade 81 can reciprocate in the thickness direction of the bookbinding sheet bundle.

  Further, a blade position sensor flag 103 is provided on the abutting piece 88a of the vertical moving member 88 as shown in FIG. Further, the post 89a is provided with a blade position sensor 102 for detecting the blade position sensor flag 103. The bookbinding sheet bundle P3 is cut by the cutting blade 81 until the blade position sensor 102 detects the blade position sensor flag 103.

  In the lower part of the bookbinding sheet bundle P3, for example, a mat 91 is provided as a receiving means for the cutting blade 81 in order to prevent the cutting blade 81 from being damaged. The mat 91 of this embodiment is formed in a roller shape. The mat 91 rotates in the arrow direction shown in FIG. With this shape of the mat 91, it is possible to rotate and drop the dust P98, for example, as a means for storing the cut chips P4 after cutting.

  The material of the mat 91 is preferably a soft material, for example, rubber, urethane, mold, etc., in order to prevent the broken line of the cutting blade 81. The roller-like mat 91 has a rubber layer formed by press-fitting a rubber cylinder on a metal shaft or metal pipe shaft, or by baking on the surface of the shaft, so that the mat 91 itself has a certain degree of rigidity. When the bookbinding sheet bundle P3 is cut, even if the pressing force from the cutting blade 81 is received, the cutting portion of the bookbinding sheet bundle is not bent. Accordingly, it is possible to prevent the cutting blade 81 from spilling and to clean the cut surface of the bookbinding sheet bundle P3.

  Furthermore, as shown in FIG. 12, a groove 91a is formed in the mat 91 by cutting, and the cut surface of the lowermost sheet (sheet that is in direct contact with the mat 91) becomes tattered or completely In order to avoid the occurrence of a problem that the cutting is not performed, the mat 91 is rotated little by little for each cutting to shift the receiving position so that the cutting is not always performed at the same position. Thus, the trimmer unit D can surely cut up to the lowest sheet of the sheet bundle, can improve the cut section of the sheet bundle, and can improve the durability of the mat 91.

  It has been experimentally found that the mat 91 can withstand about 200 to about 300 times of cutting at the same location. Therefore, it is possible to cut 300 times at the same location. The mat 91 is rotated by a predetermined amount (for example, about 5 degrees in this embodiment) in order to shift the blade receiving position at the time of cutting after the waste disposal operation. The mat 91 can be cut at about 72 places (360 degrees / about 5 degrees =) in one round, and (about 72 × about 300) = about 21600 times of cutting durability.

  Further, without controlling (shifting) the blade receiving position for each cutting, the blade receiving position is fixed up to 300 times of cutting, and the mat 91 is rotated about 5 degrees when the cutting time is about 300 times. May be. Although the rotational movement amount (shift amount) of the mat 91 is set to about 5 degrees, it is not limited to about 5 degrees depending on the shape, diameter, etc. of the mat 91, and may be freely set to a small amount movement.

  The mat 91 is rotated by receiving a rotational force from the mat rotating motor 92 via the gear 93 and the driving belt 94. The amount of rotation of the mat 91 is calculated by the CPU 200 by receiving information from the mat sensor flag 95 and the mat sensor 96. The CPU 200 controls the mat rotation motor 92 based on the calculated rotation amount to rotate the mat 91.

  Information on the cutting position and the number of times of cutting is stored in the RAM 202 of the CPU 200. Even when the power of the copying machine G is turned off, the sheet cutting apparatus B cuts the mat 91 from the receiving position by rotating the mat 91 by a predetermined amount (about 5 degrees in this embodiment) from the receiving position when the power is turned off. To start. In addition, the sheet cutting apparatus B counts the number of times of cutting with the blade position sensor 102 and the counter 200a of the CPU 200, and compares it with a predetermined number of times stored in the ROM 201 of the CPU 200 in advance to reach the number of durability of the mat 91 At the time, the display unit 112 notifies the user of the replacement time.

  Then, as shown in FIG. 14, after the cutting is completed, the mat 91 rotates in order to eliminate the cutting sheet waste P4 on the mat 91 and drops the cutting sheet waste P4 into the dust box 98. For example, the mat 91 is rotated twice by the mat rotation motor 92 shown in FIG. 12 in order to drop the cut sheet waste P4. The mat 91 waits at a receiving position advanced by a predetermined amount (for example, about 5 degrees) from the previous cutting position in preparation for the next cutting after two rotations. The chips P4 dropped by the mat 91 are dropped in front of the pusher 97 by rotating the mat 91 as shown in FIG. 14, and the dust box 98 is moved by the pusher 97 moved by the discharge belt 116 circulated by the discharge motor 115. It is conveyed to.

[Control section of sheet cutting device]
FIG. 15 is a control block diagram of the sheet cutting apparatus mainly composed of the trimmer unit D. For example, a central processing unit (CPU) 200 that is a control means for controlling the sheet cutting apparatus B has a storage unit such as a read only memory (ROM) 201, a random access memory (RAM) 202, a counter 200a, and a timer 200b. doing.

  The RAM 202 stores calculation data of the CPU 200, control data received from the copying machine main body, count data such as the number of times of cutting with a cutting blade described later, and the like.

  The ROM 201 stores in advance a control processing program corresponding to control procedures shown in FIGS. 16, 17, and 18, which will be described later, executed by the CPU 200, and set trimming width information that is a cutting width. Further, the ROM 201 stores exchange standard information such as the number of sheet bundle cuttings, which is a judgment standard for exchanging the mat 91. This replacement reference information can be changed when the type of the cutting blade, the sheet size, the sheet material, and the like are changed.

  A passage sensor 308 shown in FIG. 8, a cutting blade drive motor 85 shown in FIG. 10, and a blade position sensor 102 are connected to the CPU 200. The passage sensor 308 sends a detection signal to the CPU 200 that detects that the bookbinding sheet bundle P3 has been sent to the rotary stage 301. The cutting blade driving motor 85 is started by the CPU 200 after a predetermined time when the CPU 200 receives a detection signal from the passage sensor 308. The blade position sensor 102 detects that the cutting blade 81 has been lowered by the sensor flag 103. The number of times the blade position sensor 102 is detected is counted by a counter 200a in the CPU 200. The CPU 200 determines whether or not the mat 91 should be replaced by comparing the counted number of times of cutting and the number of times of cutting stored in the ROM 201 (see FIGS. 17, S2000, S2002, and S2006).

  The CPU 200 is also connected with a display unit 112 that informs the user when the CPU 200 determines that the mat 91 needs to be replaced.

  The CPU 200 is connected to a mat rotation motor 92 that rotates the mat 91 and a mat sensor 96 that detects the rotation position and the rotation amount of the mat 91. The CPU 200 controls the mat rotation motor 92 based on information from the mat sensor 96 to rotate the mat 91.

  A sheet detection sensor 319 is connected to the CPU 200. For example, a sheet detection sensor 319 serving as a detection unit detects that the cut sheet has been discharged and that the cut sheet has been inserted into the discharge port 210. The CPU 200 starts the conveyance belt motor F322, the conveyance belt motor R323, and the conveyance motor 110 based on a detection signal of the sheet detection sensor 319 that detects that the sheet to be cut is inserted into the discharge port 210. .

  In addition, the CPU 200 includes a cover motor 37, a shutter motor 28, a vertical motor 108, a discharge motor 115, a blade replacement sensor 113, a discharge sensor 22, a registration tip sensor 23a, a registration sensor 24, a photo sensor 50f, a photo sensor 50i, and a passage sensor. A projection detection sensor 312 and a projection detection sensor 306 are also connected. Each motor is connected to the CPU 200 via drivers D1 to D10.

  The CPU 200 stores the cutting information even when the power of the copying machine G or the sheet cutting device B itself is turned off. When the power is turned on again, the CPU 200 is based on the stored cutting information. The cutting information is continuously stored.

[Trimmer operation, normal cutting mode operation]
Next, the configuration diagram of each part shown in FIGS. 1 to 14, the control block diagram shown in FIG. 15, and the flowchart for explaining the operation of the trimmer unit that performs chip processing from conveyance of the bookbinding sheet bundle P <b> 3 shown in FIG. 16. The operation of the normal cutting mode of the sheet cutting apparatus B will be described mainly with respect to the operation of the trimmer unit D.

  16, the CPU 200 receives sheet size information, set trimming width (cutting width) information, and the like from the control unit 9 of the apparatus main body A of the copier G, and receives the conveyance belt motor shown in FIG. 9. The rotation of the F322 and the conveyance belt motor R323 is controlled, and the bookbinding sheet bundle P3 on the rotation stage 301 is conveyed to a predetermined cutting position by the abutting plate 318 (S1000). At this time, the trimming width of the bookbinding sheet bundle P3 is, for example, about 2 mm to 20 mm.

  After conveying the bookbinding sheet bundle P3, the CPU 200 drives the vertical motor 108 shown in FIG. 13 and controls the rotation of the cam 99 until the link 100 moves to the lower fulcrum. The link 100 presses the bookbinding sheet bundle P3 against the mat 91 with the sheet presser 104 against the paper presser spring 101 (S1002). At this time, the attachment member 109 moves in a direction away from the abutting 88 a on the vertical moving member 88 in accordance with the operation of the link 100. Then, the vertical movement member 88 shown in FIG. 10 is pulled by the tension springs 90 a and 90 b and descends as the attachment member 109 descends. The vertical moving member 88 is provided with a longitudinal moving member 82 having a cutting blade 81. Therefore, the cutting blade 81 is lowered by the lowering of the attachment member 109 and the pulling of the tension springs 90a and 90b, and comes into contact with the bookbinding sheet bundle P3 (S1004).

  After completing the bookbinding sheet bundle P3 pressing by the sheet pressing 104, the CPU 200 controls the cutting blade drive motor 85 shown in FIG. 10 to rotate, and passes through the rotating cam 86, the protrusion 86a, the rotation receiver 87, and the longitudinal movement member 82. The cutting blade 81 is caused to reciprocate in the direction perpendicular to the sheet thickness direction (left and right direction in FIG. 10). The cutting blade 81 starts cutting the bookbinding sheet bundle P3 by this reciprocating motion and lowering by pulling the tension springs 90a and 90b (S1006), and cuts the bookbinding sheet bundle P3. The bookbinding sheet bundle P3 is cut by the reciprocating motion of the cutting blade 81 until the blade position sensor flag 103 that is lowered by the downward movement of the vertical moving member 88 and the cutting blade 81 detects the blade position sensor 102 (S1008).

  The blade position sensor 102 sends a cutting end signal to the CPU 200 when it detects the blade position sensor flag 103. The CPU 200 stores the number of cuts obtained by counting the number of cuts in the RAM 202 (S1010).

  The process of S1010 shown in FIG. 16 will be described based on FIG. The CPU 200 compares the number of cuts (S2000) counted and stored in the RAM 202 of the CPU 200 with the predetermined number stored in advance in the ROM 201 in the CPU 200 (S2002) and counts based on the detection signal of the blade position sensor 102. When the number of times of cutting reaches the endurance number of the mat 91, an exchange sign for the mat 91 is sent to the CPU 200 of the sheet cutting apparatus B or the control unit 9 of the apparatus main body A of the copying machine G. The CPU 200 informs the user of the replacement of the mat 91 by the display units 112 and 117 shown in FIG. 15 provided in the sheet cutting apparatus B or the apparatus main body A of the copying machine G, an artificial sound device (not shown), or the like ( S2004). When the counted number of times of cutting does not reach the number of endurance times of the mat 91, or after the mat 91 is replaced, the following processing is performed (S2006, S1012).

  16, the cut sheet waste P4 dropped from the mat 91 by the rotating mechanism of the mat 91 (S1014) is conveyed by the pusher 97 (S1016) and dropped into the dust box 98. (S1018). After the scrap processing rotation operation of the mat 91, the CPU 200 determines whether the three sides other than the gluing portion have been cut (S1020). If there is an uncut piece, the bookbinding sheet bundle P3 is again set to 90 as described above. Degree rotation (S1024), and the process returns to S1000.

  After the cutting of the three pieces is completed, the CPU 200 controls the rotation of the conveyance motor 110, discharges the bookbinding sheet bundle P3 from the rotation stage 301 to the stacking tray E (S1022), and ends the bookbinding operation.

  In the above description, the sheet bundle has been cut. However, a single sheet can be cut in the same manner.

[Operation in manual cutting mode]
Next, the operation in the manual cutting mode will be described based on the flowchart of FIG.

  The manual cutting mode is selected by turning on the manual start key by the user in the operation unit 121 of the apparatus main body A or the operation unit 120 provided in the trimmer unit D. When the manual start key is turned on, the communication device 207 (see FIG. 15) receives a manual cutting mode start instruction, and causes the CPU 200 to start processing in the manual cutting mode (S3000).

  The CPU 200 reads the sheet bundle cut width data L1 selected by the operation unit 121 of the apparatus main body A into the ROM 201. Then, the CPU 200 waits until the sheet bundle is inserted into the discharge port 210 shown in FIG. 8 of the trimmer unit D by the user (S3002).

  When an arbitrary sheet bundle to be cut is inserted into the discharge port 210 by the user, the sheet detection sensor 319 that detects the presence or absence of the sheet bundle is activated to detect that the sheet bundle has been inserted into the discharge port 210. (S3002). The CPU 200 rotates the conveyor belt motor F322, the conveyor belt motor R323, and the conveyor motor 110 shown in FIGS. 8 and 9 to rotate the first conveyor belt 309, the second conveyor belt 310, the third conveyor belt 320, and the fourth conveyor belt. 321, the timing belt 317 is circulated, and the sheet bundle is conveyed to the cutting position (S3004). These motors 322, 323, and 110 and belts 309, 310, 320, 321, and 317 are examples of conveying means.

  The distance M for conveying the sheet bundle to the cutting position is a distance obtained by adding the cut width data L1 stored in advance in the ROM 201 and the distance L2 between the discharge port 210 and the position of the cutting blade 81, that is, M = L1 + L2. . The CPU 200 rotates the transport belt motor F322, the transport belt motor R323, and the transport motor 110 so as to transport the distance M. When the first conveying belt 309, the second conveying belt 310, the third conveying belt 320, the fourth conveying belt 321, and the timing belt 317 convey the sheet bundle to the cut position, the trimmer unit D uses the cutting blade 81 to convey the sheet bundle. Cut and cut by the cut width data L1 (S3006). The CPU 200 reverses the first conveyor belt 309, the second conveyor belt 310, the third conveyor belt 320, the fourth conveyor belt 321, and the timing belt 317 by reversing the conveyor belt motor F322, the conveyor belt motor R323, and the conveyor motor 110. The sheet bundle that has been circulated and finished cutting is conveyed to the discharge port 210 (S3008). When the sheet bundle is discharged from the discharge port 210 (S3010), the CPU 200 stops the conveyance belt motor F322, the conveyance belt motor R323, and the conveyance motor 110, and ends the manual mode (S3012). The CPU 200 determines completion of sheet discharge by turning off the sheet detection sensor 319, and stops the conveyance belt motor F322, the conveyance belt motor R323, and the conveyance motor 110.

  Instead of inserting the sheet bundle from the discharge port 210, as shown in FIG. 19, the sheet bundle is inserted from, for example, the inserter 211, which is a guiding means, and is cut from the discharge port 210 in the same manner as in the normal cutting mode. You may make it discharge | emit. Even in this case, it is possible to cut by the cut width data L1 of the sheet bundle selected by the operation unit (not shown) of the apparatus main body A.

  Moreover, although the above description demonstrated the cutting of the sheet | seat bundle, in the case of 1 sheet | seat, it can cut similarly. That is, sheets to be cut such as sheets and sheet bundles can be cut not only in the normal cutting mode but also in the manual cutting mode.

  As described above, in the manual cutting mode, the sheet to be cut can be cut by a desired width by operating the sheet cutting apparatus B alone regardless of the apparatus main body A of the copying machine G.

1 is a schematic front cross-sectional view of a copying machine that is an example of an image forming apparatus that includes a sheet cutting device according to an embodiment of the present invention and that includes an apparatus body. It is sectional drawing of the sheet cutting apparatus which is an example of the sheet | seat post-processing apparatus of this invention. It is a schematic front view of the conveyance alignment unit in the sheet cutting apparatus of FIG. (A) It is a schematic front view of the whole conveyance alignment unit. (B) It is an enlarged front view of a buffer mechanism. FIG. 3 is a view of a registration roller pair as viewed from the right side in FIG. 2. It is a schematic plan view of a pasting unit. It is a figure for demonstrating the bookbinding process which adhere | attaches a cover sheet on the glued sheet bundle. (A) It is a figure when starting the operation | movement which adhere | attaches a cover sheet to the glued sheet bundle. FIG. 6B is a diagram when the cover sheet passing path is opened and the glued sheet bundle starts to descend. (C) It is a figure when a cover sheet is made to adhere to a pasted sheet bundle. (D) It is a figure when the cover sheet has been bonded to the glued sheet bundle. It is a side view of the buffer mechanism of the alignment vertical path. It is a front view for operation | movement description of a rotation stage. (A) It is a figure of a state when a bookbinding sheet bundle is received from a conveyance alignment unit. (B) It is a figure of the state which conveyed the sheet | seat bundle from the rotation stage to the cutting blade. FIG. 4C is a diagram illustrating a state in which a bound bookbinding sheet bundle that has been cut is discharged from the rotary stage to the stacking tray. It is a top view of a rotation stage. It is a side view of a trimmer unit. It is a perspective view of a cutting blade and a mat. (A) It is a perspective view of the cutting blade and mat | matte of this embodiment. (B) It is a perspective view of the cutting blade and mat | matte of other embodiment. It is a perspective view of a cutting blade, a mat, and a mechanism for rotating the mat. FIG. 10 is a diagram for explaining the operation of sheet bundle pressing. FIG. 6A is a diagram illustrating a state in which a sheet bundle press presses a bookbinding sheet bundle and a cutting blade starts cutting the bookbinding sheet bundle. (B) It is a figure which shows the state which the sheet | seat bundle presser and the cutting blade left | separated from the bookbinding sheet | seat bundle. It is a figure for demonstrating the operation | movement which drops a chip in front of a pusher by rotation of a mat, and discharges it to a dust box. It is a control block diagram of a sheet cutting apparatus mainly composed of a trimmer unit. It is a flowchart for description of the operation | movement of normal cutting mode in a trimmer unit, and processing operation | movement of a chip from conveyance of a bookbinding sheet bundle. It is a flowchart which judges exchange of mats. It is a flowchart for manual cutting mode operation | movement description. It is a schematic front sectional view of a copying machine provided with a sheet cutting apparatus of another embodiment in the apparatus main body.

Explanation of symbols

A Image forming device body B Sheet cutting device (sheet post-processing device)
C Conveyance alignment unit (supply means, conveyance alignment means)
D Trimmer unit (cutting means)
E Loading tray G Copying machine (image forming device)
P sheet P1 sheet bundle P2 cover sheet P3 bookbinding sheet bundle P4 chip 1 document feeder 2 scanner unit 3 image forming unit (image forming unit)
3a Light irradiation unit 3b Photosensitive drum 22 Discharge sensor 23 Registration roller pair 23a Registration tip sensor 24 Registration sensor 25 Gluing unit 50 Buffer mechanism 81 Cutting blade 82 Longitudinal moving member 85 Cutting blade drive motor 90a Tension spring 90b Tension spring 102 Blade Position sensor 103 Blade position sensor flag 104 Sheet presser 110 Conveyance motor (conveyance means)
112 Display unit 113 Blade replacement sensor 114 Bolt 120 Operation unit 200 Central processing unit / CPU (control means)
200a counter 200b timer 201 ROM (storage unit)
202 RAM
207 Communication device 210 Discharge port 211 Inserter (guidance means)
301 Rotating stage 309 First conveyor belt (conveying means)
310 Second conveyor belt (conveying means)
317 Timing belt (conveying means)
319 Discharge sensor (detection means)
320 Third conveyor belt (conveying means)
321 Fourth conveyor belt (conveying means)
322 Conveyor belt motor F (conveying means)
323 Conveyor belt motor R (conveying means)

Claims (7)

Supply means for supplying sheets to be cut such as sheets and sheet bundles;
A cutting means for cutting the cut sheet;
A discharge port through which the cut sheet cut by the cutting means is discharged;
Conveying means for carrying the cut sheet supplied from the supply means into the cutting means, and discharging the cut sheet cut by the cutting means from the discharge port;
Control means for controlling the cutting means and the conveying means,
The conveying means is capable of carrying the cut sheet supplied from the discharge port into the cutting means,
The control means includes a normal cutting mode in which the sheet to be cut supplied from the supply means is carried into the cutting means by the conveying means and cut by the cutting means, and then discharged from the discharge port by the conveying means. And a manual cutting mode in which the sheet to be cut supplied from the discharge port is carried into the cutting unit by the transport unit and cut by the cutting unit, and then discharged from the discharge port by the transport unit. A sheet post-processing apparatus that is executable.   Detection means for detecting a sheet to be cut supplied from the discharge port, and the control means is configured to execute the manual cutting mode when the detection means detects the sheet to be cut. The sheet post-processing apparatus according to claim 1, wherein:   A storage unit for storing a cutting width of the sheet to be cut by the cutting unit; and the control unit controls the conveying unit and the cutting unit in the manual cutting mode to determine the cutting width. The sheet post-processing apparatus according to claim 1, wherein the sheet is cut by the cutting unit.   Guiding means is provided at a position different from the discharge port and guides the cut sheet to the supply means, and the control means moves the cut sheet guided by the guide means based on the normal cutting mode. The sheet post-processing apparatus according to any one of claims 1 to 3, wherein the sheet is cut by a cutting unit.   The sheet post-processing apparatus according to any one of claims 1 to 4, further comprising a conveyance aligning unit that bundles sheets to be fed to the cutting unit. Image forming means for forming an image on a sheet;
The sheet post-processing apparatus according to any one of claims 1 to 5, wherein a sheet to be cut such as a sheet or a sheet bundle on which an image is formed by the image forming unit is cut.
An image forming apparatus comprising: Image forming means for forming an image on a sheet;
A supply unit for supplying a sheet to be cut such as a sheet or a sheet bundle on which an image is formed by the image forming unit;
A cutting means for cutting the cut sheet;
A discharge port through which the cut sheet cut by the cutting means is discharged;
Conveying means for carrying the cut sheet supplied from the supply means into the cutting means, and discharging the cut sheet cut by the cutting means from the discharge port;
Control means for controlling the cutting means and the conveying means,
The conveying means is capable of carrying the cut sheet supplied from the discharge port into the cutting means,
The control means includes a normal cutting mode in which the sheet to be cut supplied from the supply means is carried into the cutting means by the conveying means and cut by the cutting means, and then discharged from the discharge port by the conveying means. And a manual cutting mode in which the sheet to be cut supplied from the discharge port is carried into the cutting unit by the transport unit and cut by the cutting unit, and then discharged from the discharge port by the transport unit. An image forming apparatus capable of being executed.

Images