JP4691682B2 - Image forming system - Google Patents

Description

  The present invention relates to a post-processing device having a cutting device for cutting the periphery of a recording sheet on which an image is formed, and an image forming system including the image forming device.

  Conventionally, it has been the mainstream to use cut paper in an image forming apparatus such as a copying machine using an electrophotographic method. However, with respect to an original image, the image is tilted, the image is offset, and the paper feed direction is used. It was difficult to completely prevent variations in the transfer start position.

  As countermeasures, several millimeters around the original image are outside the effective image area and outside the guaranteed range of the image, or the original image is formed at a normal magnification. It has been difficult to manufacture a copying machine that can correctly reproduce the entire screen of an image on recording paper.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a high-quality image forming system with a simple configuration capable of reproducing the entire original image on a recording sheet.

  The object of the present invention can be solved by the following constitution.

An original image is copied by electrophotography on a recording paper having a size larger than the desired recording paper size, and the position corresponding to the four corners of the desired recording paper size on the large recording paper and an image forming apparatus for printing Symbol in each of two positions of the front end portion and the rear end portion,
First conveying means for nipping and conveying the recording paper on which the symbol is printed;
The inclination of the recording paper on which the original image conveyed from the image forming apparatus is copied and the symbol is printed is corrected by tilting the recording paper with the symbol as a mark. A first cutting part for cutting the end part;
A second conveying means for conveying the recording paper having the leading edge and the trailing edge cut by the first cutting section;
A second cutting unit that cuts both end portions of the recording sheet, the leading end portion and the trailing end portion that have been transported from the first cutting portion;
A cutting device comprising:
An image forming system comprising:
The first cutting section is
First detection means for detecting the symbol printed on a recording sheet conveyed from the image forming apparatus at a cutting position;
When the recording sheet is conveyed while being inclined while supporting the first conveying unit, the first detecting unit simultaneously detects symbols printed at two positions at the leading end in the conveying direction of the recording sheet. First correction means for correcting the inclination by tilting the recording paper,
When the first detection means simultaneously detects two symbols at the leading end in the conveyance direction of the recording paper, the leading edge of the recording paper is cut, and the recording paper with the leading edge cut is cut into the first recording paper. Transported by one transport means, and the first detection means comprises a first cutting means for cutting the trailing edge of the recording paper when detecting at least one symbol of the trailing edge,
The second cutting part is
A second detecting means for stopping a predetermined position and detecting a symbol printed on the leading end portion of the recording paper having the leading end portion and the trailing end portion cut by the first cutting portion;
A second cutting means for cutting the end of the recording paper in the width direction;
A moving device that moves the second detection means stopped at the predetermined position in a direction opposite to the conveyance direction of the recording paper until the symbol printed on the rear end of the recording paper is detected;
The cutting position on the downstream side in the recording paper transport direction of the second cutting means moved to the vicinity of the position for cutting the end in the width direction of the recording paper, and the width of the recording paper detected by the second detection means The position of the symbol printed on the leading edge of the recording paper in the direction is compared, and if there is a deviation, the cutting position on the downstream side in the recording paper conveyance direction of the second cutting means is moved in the width direction to Correct it so that it matches the position of the symbol printed on the tip,
Printing on the cutting position upstream of the second cutting means in the recording paper conveyance direction and the trailing edge of the recording paper in the width direction of the recording paper detected by the second detection means moved by the moving device If there is a deviation, the position of the symbol printed on the rear end portion by moving the cutting position upstream of the second cutting means in the recording paper conveyance direction in the width direction is compared. Second correction means for correcting to match
An image forming system comprising:

( 2 ) a post-processing device that receives the recording paper on which the symbol discharged from the image forming apparatus is printed;
The image forming system according to (1 ), wherein the cutting device is incorporated in the post-processing device.

  With the post-processing apparatus and the image forming apparatus having the cutting apparatus of the present invention, it is possible to provide a stable and high-quality image forming apparatus capable of printing the entire surface of a recording paper having a desired size at a correct magnification.

  A post-processing apparatus having a cutting apparatus and an image forming system including the image forming apparatus according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is an overall configuration diagram of an image forming system including an image forming apparatus and a post-processing apparatus FS having a cutting apparatus.

  The illustrated image forming apparatus A includes an image reading unit 1, an image processing unit 2, an image writing unit 3, an image forming unit 4, a first sheet feeding unit 5, a second sheet feeding unit 6, a fixing unit 7, a conveying unit 8, Main control means 9 and the like are provided.

  The first sheet feeding means 5 includes a cassette sheet feeding unit 5A, a large capacity sheet feeding unit (LCT) 5B, and a manual sheet feeding unit 5C. The second paper feeding means 6 includes an intermediate paper feeding roller and a registration roller. The transport unit 8 includes a transport belt 8A, a transport path switching plate 8B, a paper discharge roller 8C, an automatic double-sided copy transport unit (ADU) 8D, and the like.

  An automatic document feeder DF is mounted on the upper part of the image forming apparatus A. A post-processing device FS including a cutting device B is connected to the left side of the image forming apparatus A shown in the drawing on the paper discharge roller 8C side.

  The document d placed on the document table of the automatic document feeder DF is conveyed in the direction of the arrow, and an image on one or both sides of the document is read by the optical system of the image reading unit 1 and is read by the CCD image sensor 1A.

  The analog signal photoelectrically converted by the CCD image sensor 1A is subjected to analog processing, A / D conversion, shading correction, image compression processing, and the like in the image processing means 2, and then sent to the image writing means 3.

  In the image writing means 3, the output light from the semiconductor laser is irradiated onto the photosensitive drum of the image forming means 4 to form a latent image.

  On the other hand, the symbols printed at the positions corresponding to the four corners of the desired recording paper size according to the present invention are pre-programmed into the memory of the main control means 9 of the image forming apparatus A, and the cutting processing mode is selected. When this is done, it is called from the memory and a latent image is formed on the photosensitive drum by the image writing means 3 via the image processing means 2.

  In the image forming unit 4, processes such as charging, exposure, development, transfer, separation, and cleaning are performed. The recording paper S sent out from the first paper supply means 5 passes through the second paper supply means 6, and a toner image is transferred from the photosensitive drum in the transfer unit.

  The recording sheet S carrying the image is conveyed by the conveying belt 8A, fixed by the fixing unit 7, and sent to the post-processing device FS from the paper discharge roller 8C. Alternatively, the recording sheet S that has undergone single-sided image processing sent to the automatic double-sided copy transport unit 8D by the transport path switching plate 8B is again discharged from the paper discharge roller 8C after the double-sided image processing in the image forming unit 4. In the post-processing device FS, the recording paper S discharged from the paper discharge roller 8C is not fixed or sorted, but is fixed to the fixed paper discharge tray 81; The material to be cut is transported to the cutting device B through a third transport path (described later).

  The cutting device B is a device for cutting the periphery of the recording paper S to finish it to a predetermined size, and details will be described later with reference to FIGS.

  In the post-processing device FS, a fixed paper discharge tray 81, a shift processing conveyance unit (large-capacity paper discharge conveyance unit) 20, and a cutting device B are arranged in a column in a substantially vertical direction from the top in the figure.

  A conveying means 10 is arranged on the upper right side of the post-processing device FS in the figure. In addition, on the left side of the post-processing device FS in the figure, an elevating / discharging tray 82 on which the shift-processed recording sheets S are stacked is disposed.

  FIG. 2 is a schematic diagram illustrating a recording paper conveyance path of the post-processing apparatus.

  The post-processing device FS is installed with its position and height adjusted so that the receiving portion 11 for the recording paper S carried out from the image forming device A matches the paper discharge roller 8C of the image forming device A.

The conveying means 10 for the recording paper S connected to the receiving unit 11 is branched into three systems, ie, an upper first conveying path 1, an intermediate second conveying path 2, and a lower third conveying path 3, and a switching gate G1. , G2 feeds the recording paper S to one of the transport paths.
(1) First transport path 1 (no cutting, non-sort mode, discharged to a fixed discharge tray 81 at the top of the apparatus)
The image-formed recording sheet S discharged from the image forming apparatus A is introduced into the receiving unit 11, conveyed by the inlet roller pair 12, and passes through the right passage 13 of the upper first switching gate G1. Then, the paper is sandwiched between the upper transport roller pair 14 and the transport roller pair 15 and then transported upward, and is further sandwiched between the cut paper discharge roller pair 16 and discharged onto the fixed paper discharge tray 81 at the upper part outside the apparatus, and sequentially stacked. The

In this recording paper conveyance process, the switching gate G1 is swung by driving the solenoid SD1, closes the passage 17, opens the passage 13, and allows the recording paper S to pass through the fixed paper discharge tray 81. .
(2) Second conveying path 2 (no cutting, shift processing mode, paper discharged to the lift paper tray 82)
When this transport mode is set, the switching gate G1 closes the passage 13 and keeps the passage 17 open while the solenoid SD1 is off, allowing the recording paper S to pass through the passage 17. Similarly, the second switching gate G2 closes the lower passage 31 and holds the upper passage 21 in an open state, thereby allowing the recording paper S to pass through the passage 21.

The image-formed recording paper S discharged from the image forming apparatus A passes through the receiving portion 11 and the entrance roller pair 12 and passes through the passage 17 formed in the open state on the left side of the switching gate G1. It is sandwiched between the roller pair 18 and passes through the passage 21 above the second switching gate G2 and enters the second transport path 2. Further, the recording sheet S is sandwiched between a pair of conveying rollers 22 obliquely below, sandwiched by a shift means 70 and a pair of shift rollers 24 through a passage 23, and then moved up and down by a lifting / discharging tray 82 outside the apparatus through a pair of cut sheet discharge rollers 26. Discharged to the top.
(3) Third conveyance path 3 (cutting processing mode, paper is discharged to the paper cutting tray 180)
The recording sheet S to be subjected to the cutting process is sent to the receiving unit 11 of the post-processing device FS, and the inlet roller pair 12, the left passage 17 of the first switching gate G1, the conveying roller pair 18, and the switching gate G2. It passes through the lower passage 31 and is transported to the third transport path 3.

  In the third transport path 3, the recording paper S is sandwiched and transported by the downstream transport roller pair 32, and further sandwiched and transported by the downstream transport roller pair 34, and sent to the cutting device B.

  FIG. 3 is a sectional view of the cutting apparatus according to the present invention.

  The cutting apparatus B includes a first cutting unit 100, a first conveying unit 110, a second conveying unit 120, a pressing unit 140, second cutting units 150 and 151, a cutting paper discharge tray 180, and the like.

  The first transport unit 110 includes a transport belt 111, an upper transport belt 116, a first transport outer frame 115, and the like.

  The conveyor belt 111 is wound around a drive roller 112 and a driven roller 113 that are driven and rotated by a motor M1 that is a drive source (not shown). The driving roller 112 and the driven roller 113 are supported by the first conveying outer frame 115, and the conveying belt 111 rotates at a fixed position. The guide plate 114 in the vicinity of the drive roller 112 guides the recording sheet S from the conveying belt 111 to the first cutting lower blade 102 of the first cutting unit 100 (to be described later) when passing the recording sheet, and swings down and retracts when cutting. Is configured to do.

  The upper conveyor belt 116 is wound between an upper drive roller 117 connected to the motor M1 of the same drive source as the drive roller 112 and driven rollers 118 and 119, and is rotatable. The upper drive roller 117 is supported by the first transport outer frame 115, and the driven rollers 118 and 119 are swingably supported by the first transport outer frame 115. The upper conveying belt 116 presses the recording paper passing therethrough and swings according to the thickness of the recording paper. The configuration of the first transfer outer frame 115 will be described later with reference to FIG.

  The first cutting unit 100 is connected to a first cutting upper blade 101, a first cutting lower blade 102, and a motor M2 that is a driving source, and gears g11 and g12 that are driving means for driving the first cutting upper blade 101 to be movable up and down. , G13, a movable frame 104, a lifting drive member 105, an upper blade support member 106, and the like.

  The motor M2 rotates the gears g11, g12, and g13, and eccentrically rotates the eccentric pin 103 that is installed at the eccentric position of the gear g13. The tip end portion of the eccentric pin 103 slides in the movable frame body 104 and moves the movable frame body 104 up and down.

  An upper blade support member 106 is fixed to an upper part of an elevating drive member 105 that is integrated with the movable frame 104 and supported to be movable up and down. A first cut upper blade 101 is fixed to the upper blade support member 106.

  The pressing means 140 for pressing the recording paper S and the guide plate 114 includes a movable frame 141, a spring 142, a pressing member 143, a roller 144, and the like. The movable frame 141 is urged downward by a spring 142 and is supported by the upper blade support member 106. A pressing member 143 that presses the leading end portion (cutting portion) of the recording paper S and a roller 144 that presses the guide plate 114 via the recording paper S are supported at the lower portion of the upper blade support member 106.

  The recording paper S is conveyed on the guide plate 114, and the two symbols printed near the corner of the leading edge of the recording paper S are on the line connecting the two cutting edges of the first cutting upper blade 101 and the first cutting lower blade 102. Is detected by the sensor PS1, the rotation of the driving roller 112 and the upper driving roller 117 is temporarily stopped by the stop of the motor M1, which is the driving source of the two rollers, and the recording paper S is It is stopped on the conveyor belt 111.

  At this time, the motor M2 is driven, the cutting edge of the first cutting upper blade 101 that can be moved up and down is lowered, and the leading edge of the recording paper S is placed at the center of the symbol between the cutting edge of the first cutting lower blade 102 at the fixed position. Cut along a straight line passing through. The cutting command is issued from the post-processing control unit 90 when the sensor PS1 detects the two symbols and issues a signal to the post-processing control unit 90. The sensor PS1 may be an image pickup device (hereinafter simply referred to as a CCD) composed of a line CCD, and a plurality of photosensors are provided at positions according to the rated size of the target recording paper S in the specifications of the image forming apparatus. It may be arranged.

  After cutting the leading edge of the recording sheet S, the motor M1 is actuated again, the driving roller 112 and the upper driving roller 117 are rotated, and the recording sheet S is conveyed and transferred to the second conveying roller pair 123 of the second conveying means 120. Is done.

  Next, when the two symbols printed in the vicinity of the corner of the rear end of the recording sheet S come on a line connecting the two cutting edges, the drive motor (described later) of the second conveying means 120 stops, and the recording sheet S is sandwiched between the second conveying roller pair 123 and stopped, the trailing edge of the recording sheet S is cut, and the recording sheet S has a desired length.

  A correction method when the recording sheet S is conveyed in an inclined manner will be described later with reference to FIG.

  Reference numeral 108 denotes a waste box that accommodates the cut waste of the recording paper S, and PS2 is a sensor that detects the fullness of the waste.

  The second transport unit 120 is disposed downstream of the first cutting unit 100 in the recording paper transport direction, and uses a motor M3 (not shown) that drives the second transport as a drive source.

  The second cutting sections 150 and 151 are disposed between the second conveyance outer frames (described later) of the second conveyance means 120. In the second cutting sections 150 and 151, the both end portions in the traveling direction of the recording paper S are cut.

  Details of the configuration and operation of the second transport unit 120 and the second cutting units 150 and 151 will be described later with reference to FIGS.

  The recording sheet S that has been cut in all directions is rotated by the rotation of the motor M3 to rotate the intermediate conveyance upper roller 124, the intermediate conveyance lower roller 125, and the cut sheet discharge roller pair 126, and is discharged to the cut sheet discharge tray 180. .

  The sensor PS3 is disposed above an upper guide plate (described later) positioned between the second transport roller pair 123 and the cut paper discharge roller pair 126, and can be rotated in the forward and reverse direction by a PS3 drive motor M4 (not shown, hereinafter). In general, the moving device includes a motor M4) and can be reciprocated in the recording paper conveyance direction.

  The sensor PS3 is configured to be able to detect the position of the symbol printed on the recording paper S, and may detect the position of the second cutting lower blades 154 and 155 and issue a signal to the post-processing control means 90. It is configured to be able to.

  As the sensor PS3, a CCD may be used similarly to the sensor PS1, or a plurality of photosensors may be used in accordance with the recording paper S of the rated size.

  Next, a configuration of cutting angle correction when the recording paper S is conveyed at an inclination in the first cutting unit that cuts the leading edge and the trailing edge of the recording paper S will be described with reference to FIG.

  FIG. 4 is a cross-sectional view taken along line aa of the first transport outer frame in FIG. 3.

  With the configuration in which the first conveying outer frame 115 itself, which is the first correction unit, is inclined with respect to the recording sheet S conveyed in an inclined manner, the recording sheet S is inclined in the opposite direction to correct the inclination, and is cut in that state.

  In the figure, the first conveyance outer frame 115 is regulated by a regulating member (not shown) in the vertical direction with respect to the cutting apparatus B, but the horizontal direction is the first conveyance outer frame mounting base (no reference numeral) of the cutting apparatus B. A pin P fixed to the bottom portion of the first transport outer frame 115 is rotatably held in a hole (not indicated by reference numeral) formed in the hole, and one is recorded by two spring members SP fixed to the cutting device B. It is energized in the paper traveling direction.

  On the other hand, an arc-shaped rack R is formed at the bottom of the first transport outer frame 115 and meshes with a pinion PN that is rotatably fixed to the first transport outer frame mounting base. The pinion PN meshes with a first conveyance outer frame rotation motor M5 (hereinafter simply referred to as a motor M5) (not shown) capable of forward and reverse rotation via a gear. The pitch circle of the arc-shaped rack R is an arc having the pin P as the rotation center.

  If the recording paper S is normally conveyed as shown by the one-dot chain line in the figure, the leading edge and the trailing edge of the recording paper S are cut as they are by the detection signal of the sensor PS1 at the cutting position CP of the first cutting section 100. As indicated by the broken line in the figure, it is necessary to correct when the recording paper S is conveyed with an inclination (inclination angle = θ).

  When the leading edge of the recording sheet S enters as shown in the drawing, the symbol K1 is detected by the sensor PS1, but the symbol K2 is not detected at that time.

  When the symbol K1 is first detected by the sensor PS1 according to a program previously input to the memory of the main control means 9, the motor M5 rotates forward, for example, to rotate the pinion PN in the clockwise direction. The rack R is engaged by the clockwise rotation of the pinion PN and the spring pressure from the spring member SP, and the entire first transport outer frame 115 is rotated clockwise around P as the rotation center. As a result, the recording sheet S sandwiched between the conveying belt 111 and the upper conveying belt 116 is returned in the direction opposite to the recording sheet conveying direction, and the symbol K1 on the recording sheet S deviates from the field of view of the sensor PS1. .

  If the symbol K1 on the recording sheet S is detected by the sensor PS1 and deviates from the field of view after the program, the motor M1 is actuated to rotate the driving roller 112 and the upper driving roller 117, thereby conveying the belt. The post-processing control unit 90 is configured so that the recording paper S is conveyed again in the conveying direction by rotating the 111 and the upper conveying belt 116.

  When the recording sheet S is transported again in the transport direction, the symbol K1 once deviated from the field of view of the sensor PS1 is detected again by the sensor PS1, and the first transport outer frame 115 is rotated clockwise through the motor M5 and the pinion PN. Rotate to

  The inclination of the recording sheet S is corrected while repeating the above two operations, and when the symbols K1 and K2 are detected simultaneously by the sensor PS1, that is, the inclination angle of the first conveying outer frame 115 is the initial value of the recording sheet S. When the inclination angle θ coincides with the inclination angle θ, the inclination of the recording sheet S is corrected, the motor M1 is stopped and the motor M2 is driven, the cutting edge of the first cutting upper blade 101 is lowered, and the leading edge of the recording sheet S is cut. .

  For the rear end of the recording paper S, the sensor PS1 detects one of the two symbols located near the rear end among the symbols printed at the four corners of the recording paper S. The trailing edge of the recording paper S is cut.

  In the present embodiment, the configuration for correcting the angle as in the front end portion is not applied when cutting the rear end portion of the recording paper S, but the same configuration as the first transport outer frame 115 is applied to the second transport means 120. Needless to say, the angle adjusting mechanism can be provided.

  5A is a top view of the second conveying means and the second cutting unit, FIG. 5B is a cross-sectional view taken along the line aa of FIG. 5A, and FIG. 6 is the center of FIG. 5A. It is sectional drawing.

  The second transport unit 120 includes second transport outer frames 121 and 122, a second transport roller pair 123, an intermediate transport upper roller 124, an intermediate transport lower roller 125, a cut paper discharge roller pair 126, an upper guide plate 127, and a lower guide plate. 128 and a motor M3.

  Between the second conveyance outer frames 121 and 122, the second conveyance roller pair 123 and the cut paper discharge roller pair 126 are rotatably held via bearings (no reference numerals), respectively. Further, the lower rollers of the two roller pairs are driven and rotated by a motor M3 which is a driving source via a gear (not denoted by reference numeral) disposed at the end of the roller shaft. The upper rollers of the two roller pairs are urged downward by a spring means (not shown) and are pressed against and driven by the lower rollers.

  The intermediate transport upper roller 124 and the intermediate transport lower roller 125 are disposed between the second transport roller pair 123 and the cut paper discharge roller pair 126. The intermediate conveyance upper roller 124 is attached to the upper guide plate 127 and is urged downward by a spring means (not shown) to be brought into pressure contact with the intermediate conveyance lower roller 125.

  The intermediate conveyance lower roller 125 is fixed to the cutting apparatus B main body, and is driven and rotated by a transmission unit such as a wire, a pulley, or a gear (not shown) from a motor M3 that is the same drive source as the second conveyance roller pair 123 and the like.

  The upper guide plate 127 and the lower guide plate 128 are arranged above and below the conveyance path of the recording paper S, and are fixed to the second conveyance outer frames 121 and 122 via attachment plates (without reference numerals).

  The two guide plates 127 and 128 are disposed at a position that bridges the two rollers of the second conveyance roller pair 123 and the cut paper discharge roller pair 126, and an intermediate conveyance upper roller 124 and an intermediate conveyance lower roller are located near the center. 125 escape holes H are formed.

  The second conveying roller pair 123 is provided with a valley in a part of the roller part for delivery of the recording paper S, and with respect to the upper guide plate 127 and the lower guide plate 128 provided with a cut part in the corresponding part. The valley and the notch are overlapped so that the recording sheet S discharged from the second conveying roller pair 123 is surely entered into the gap between the upper guide plate 127 and the lower guide plate 128. It is.

  The second cutting sections 150 and 151 are disposed between the second conveying outer frames 121 and 122 in parallel with the outer frames 121 and 122, and the second cutting upper blades 152 and 153 and the second cutting lower blades 154 and 155. A cutting blade operating shaft 156, a cutting blade operating gear 157, a cutting blade interlocking member 158, recording paper guide plates 131 and 132, recording paper pressing members 133 and 134, a cutting blade operating motor M7 (hereinafter simply referred to as a motor M7), and A cutting position determining means 160 is provided.

  The two cutting position output means 160 are between the second conveying outer frames 121 and 122, near the cutting paper discharge roller pair 126 (downstream side of the recording paper conveyance) and near the second conveying roller pair 123 (upstream side of the recording paper conveyance). ) Are arranged in a direction perpendicular to the outer frames 121 and 122. The two cutting position determining means 160 respectively include a screw rod 162, two positioning members 163, two cutting width positioning stepping motors M6 (hereinafter simply referred to as motor M6), and an output shaft of the motor M6. The two drive gears 164 are fixed to each other.

  FIG. 7 is a cross-sectional view taken along line bb of FIG. 5A for explaining the cutting position extracting means.

  The inclination of the recording paper S is corrected in the first cutting unit that cuts the leading edge and the trailing edge of the recording paper S. However, in the second cutting unit that cuts both ends in the width direction of the recording paper S, the recording paper S It is necessary to correct for the deviation between the center in the width direction and the center in the width direction of the cutting apparatus B and the inclination that occurs after transport to the second transport means 120.

  The configuration of the cutting position determining means 160 as the second correcting means according to the present invention will be described below with reference to FIG.

  Two motors M6 are held by the second cutting lower blades 154 and 155, respectively. One drive gear 164 is fixed to each of the output shafts of the four motors M6, and meshed with the gear portions of the four positioning members 163 that are rotatably held by the two screw rods 162.

  The positioning member 163 is rotatable on the gear portion formed on a part of the outer diameter and a bearing (not indicated by reference numeral) formed on the other outer diameter portion and fixed to the second cutting lower blades 154 and 155. It has a cylindrical portion to be held, and a screw hole portion formed in an inner diameter that is screw-fitted to the screw rod 162.

  The screw rod 162 is fixed to the second conveying outer frames 121 and 122 via ring-shaped members (without reference numerals) in the vicinity of both ends thereof, and the entire outer periphery of the screw rod 162 is screwed to the positioning member 163. The thread part to be formed is formed.

  131 and 132 are recording paper guide plates fixed to the second cutting lower blades 154 and 155, and 133 and 134 are recording paper pressing members that slide up and down with respect to the second cutting upper blades 152 and 153. It is freely attached and is urged downward by a spring member (no reference symbol).

  FIG. 8 is a cross-sectional view taken along the line cc of FIG. 5A for explaining a configuration relating to driving of the second cutting upper blades 152 and 153.

  The motor M7 is fixed in the vicinity of the end of the second cutting lower blade 154, and rotationally drives a cutting blade operating gear 157 that meshes with a drive gear (no reference numeral) supported on the output shaft of the motor M7.

  The cutting blade operating gear 157 forms a gear portion that meshes with the drive gear at a part of the outer diameter, and forms a part (cylindrical portion) of the other outer diameter in the vicinity of the end portion of one second cutting upper blade 152. The other part of the outer diameter (cylindrical part) is fitted in the hole formed in one of the second cutting lower blades 154 and is held rotatably, and the cutting blade operates at the inner diameter. The shaft 156 is slidably fitted to the shaft 156 and is provided with a rotation stop by a key and a key groove (described later).

  Similarly to the cutting blade operation gear 157, the cutting blade interlocking member 158 is fixed to a hole formed with a part of the outer diameter (cylindrical portion) in the vicinity of the end of the other second cutting upper blade 153. A part (cylindrical portion) of the outer diameter is fitted in a hole formed in the other second cutting lower blade 155 and is rotatably held, and is slidable with respect to the cutting blade operating shaft 156 at the inner diameter. It is configured to be fitted and to be prevented from rotating by a key and a key groove (described later).

  The second cutting upper blades 152 and 153 and the second cutting lower blades 154 and 155 are configured to always contact each other without a gap.

  FIG. 9 is a flowchart showing the process of cutting the recording paper around the four sides.

The process from when the recording paper S is conveyed to the cutting device B to when the recording paper S is cut on all four sides and discharged to the cutting paper discharge tray will be described below with reference to FIG.
(S1) Before the recording paper S is conveyed into the post-processing device FS, a setting signal for performing a four-side cutting process is input to the recording paper S.
(S2) The recording sheet S conveyed into the post-processing device FS is sent to the first conveying means 110 of the cutting device B, and is sandwiched between the conveying belt 111 and the upper conveying belt 116, and is fed to the first cutting unit 100. It is sent. When the sensor PS1 detects a symbol printed on the recording paper S, the motor M1 stops and the conveying belt is stopped, and the recording paper S stops in a state where the symbol position matches the cutting position.
(S3) When the recording sheet S is tilted (the sensor PS1 can detect only one of the two symbols in the vicinity of the leading end of the recording sheet S) and is conveyed to the cutting position, the motor M5 is moved in one direction. The pinion PN is rotated to rotate, the rack R is rotated, and the first transport outer frame 115 is rotated in one direction. Further, the inclination of the recording sheet S is corrected by rotating the motor M1 and rotating the conveying belt 111 and the upper conveying belt 116 via the driving roller 112 and the upper driving roller 117. This operation is repeated, and when two symbols near the leading edge of the recording paper S are simultaneously detected by the sensor PS1, the motor M1 and the motor M5 are stopped and the recording paper S is stopped.
(S4) The post-processing control means 90 starts driving the motor M2, and drives the lifting drive member 105 downward through the gears g11 to g13. By this downward driving, first, the pressing member 143 of the pressing means 140 presses the upper surface of the recording paper S to correct and adhere the warp of the recording paper S, and then the first cutting upper blade 101 descends and the recording paper S continues. Cut the tip of the.
(S5) After the leading edge cutting process of the recording paper S, the post-processing control unit 90 drives the motor M2 to raise the first cutting upper blade 101 and the pressing member 143 of the pressing unit 140.
(S6) In response to a command from the post-processing control means 90, the motor M1 resumes rotation and operates the transport belt 111, and the motor M3 is operated to drive the second transport roller pair 123 and the intermediate transport roller 125. The recording sheet S passes over the guide plate 114 and is transported with the gap between the upper guide plate 127 and the lower guide plate 128 of the second transport unit 120 held between the second transport roller pair 123.
(S7) When the sensor PS1 detects the symbol printed in the vicinity of the corner at the rear end of the recording paper S, the motor M1 is stopped to stop the conveying belt, and the recording paper S matches the position of the symbol with the cutting position. Stop at the specified position.
(S8) Similar to the cutting of the leading edge of the recording paper S described above, the post-processing control means 90 drives the motor M2 to lower the pressing member 143 to press the recording paper S and lower the first cutting upper blade 101. Thus, the trailing edge of the recording paper S is cut.
(S9) In response to a command from the post-processing control means 90, the first cutting upper blade 101 and the pressing member 143 of the pressing means 140 are raised.
(S10) The motor M3 is operated to drive the second transport roller pair 123 and the intermediate transport roller 125, and the recording paper S is transported in the second transport means 120.
(S11) Receiving the information of the desired recording paper size input to the main control means 9, the post-processing control means 90 operates the motor M7 to rotate the two screw rods 162 to rotate the second cutting means 150, respectively. , 151 is moved to the vicinity of the cutting position.
(S12) When the leading edge of the recording paper S reaches the stop position of the sensor PS3 and the sensor PS3 detects the symbol printed in the vicinity of the corner of the leading edge, the post-processing control means 90 stops the rotation of the motor M3 and the pair of conveying rollers. 123 and the intermediate conveyance lower roller 125 are stopped to stop the recording sheet S.
(S13) The position of the symbol near the leading edge of the recording paper S in the width direction of the recording paper is detected by the sensor PS3 at a position near the cutting position output means 160 on the downstream side of the recording paper conveyance, and a signal is sent to the post-processing control means 90. The detection result of the feed and the symbol position is compared with the positions of the second cutting lower blades 154 and 155 moved in advance. If there is a deviation, the motor M6 is further rotated to correct the positions of the second cutting lower blades 154 and 155, respectively, to obtain a cutting position of a desired recording paper size that matches the symbol.
(S14) The position at which the motor M4 is activated and moved in the direction opposite to the recording paper conveyance direction until the symbol near the rear end of the recording paper S is detected while the sensor PS3 is detectable. The motor M4 is stopped and the sensor PS3 is stopped.
(S15) In the cutting position output means 160 on the upstream side of the recording paper conveyance, the position of the symbol on the recording paper S in the width direction of the recording paper is detected by the sensor PS3 in the same manner as the cutting position output means 160 on the downstream side of the recording paper. Detect and send a signal to the post-processing control means 90 to compare the position of the symbol with the position of the second cutting lower blades 154 and 155. If there is a deviation, the motor M6 is further rotated until the two positions match to obtain a cutting position of a desired recording paper size.
(S16) In response to a command from the post-processing control means 90, the motor M7 is rotated forward, and the cutting blade operating gear 157 is rotated via a gear supported by the motor M7. The second cutting upper blade 152 integrated with the cutting blade operation gear 157 rotates downward, and the cutting blade operation shaft 156 that operates integrally via the key K inserted into the cutting blade operation gear 157 rotates. To do. By the rotation of the cutting blade operating shaft 156, the cutting blade interlocking member 158 that operates via the key K and the second cutting upper blade 153 integrated with the cutting blade interlocking member 158 rotate. With respect to the recording paper stopped at the cutting position by the signal from the sensor PS3, the recording paper pressing members 133 and 134 first come into contact with the recording paper S by the rotation of the second cutting upper blades 152 and 153, and the recording paper The upper surface of S is pressed and the warp of the recording paper S is corrected and brought into close contact, and then the second cutting upper blades 152 and 153 descend while rotating, and the recording paper is in contact with the second cutting lower blades 154 and 155. Cut S.
(S17) After the cutting of the recording paper S is completed, the motor M7 is rotated in reverse by a command from the post-processing control means 90, and the cutting blade operating gear 157 is rotated via the gear supported by the motor M7. 2 The cutting upper blades 152 and 153 and the recording paper pressing members 133 and 134 are rotated and moved upward.
(S18) The motor M3 is driven to rotate the intermediate conveyance lower roller 125 and the cut paper discharge roller pair 180, and the recording paper S is discharged to the cut paper discharge tray 180 outside the apparatus.

  In this embodiment, four symbols are attached to the four corners of the recording paper, and the position of the symbol is detected by the sensor to correct the inclination of the recording paper. However, the cutting accuracy on the cutting device side is described. When the value is high, the present invention can also be applied to a configuration with two or three symbols. For example, the cutting device may be configured such that after cutting one side of the recording paper, the cutting blade or the recording paper holding device rotates or moves while cutting the recording paper to cut the other side.

  In this embodiment, the adjustment of the cutting blade in the recording paper width direction is configured using four motors. For example, the end surface in the width direction is cut with reference to the end surface after cutting in the longitudinal direction of the recording paper. If the cutting device is configured, or the cutting device is configured to perform cutting at two or more locations at the same time, it is possible to reduce the number of adjustment points in the application of the present invention.

  Furthermore, in this embodiment, the cutting device is incorporated in the post-processing device. However, the cutting device can be separated and arranged next to the post-processing device, without using the post-processing device. It can also be attached directly to the forming device.

  The post-processing apparatus having the cutting apparatus according to the present invention is connected to an image forming apparatus such as a copying machine, a printer, or a multifunction machine of these. An image of a desired size is formed by the image forming apparatus, and after processing such as single-sided recording or double-sided recording, the discharged large-size recording paper is accurately cut to a desired size by the cutting apparatus of the present invention.

1 is an overall configuration diagram of an image forming system including an image forming apparatus and a post-processing apparatus having a cutting apparatus. FIG. 4 is a schematic diagram illustrating a recording paper conveyance path of the post-processing apparatus. Sectional drawing of the cutting apparatus which concerns on this invention. FIG. 4 is a cross-sectional view taken along the line aa of the first transport outer frame in FIG. 3. The top view and partial sectional view of a 2nd conveyance means and a 2nd cutting part. The center sectional view of Drawing 5 (a). Bb sectional drawing of Fig.5 (a). Cc sectional drawing of Fig.5 (a). The flowchart which shows the process of the surrounding four-side cutting of a recording paper.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 1st cutting part 110 1st conveyance means 115 1st conveyance outer frame 120 2nd conveyance means 140 Pressing means 150,151 2nd cutting part 160 Cutting position-finding means A Image forming apparatus B Cutting apparatus FS Post-processing apparatus K1, K2 Symbol M2, M6, M7 Motor PS1, PS2, PS3 Sensor S Recording paper

Claims (2)

An original image is copied by electrophotography on a recording paper having a size larger than the desired recording paper size, and the position corresponding to the four corners of the desired recording paper size on the large recording paper and an image forming apparatus for printing Symbol in each of two positions of the front end portion and the rear end portion,
First conveying means for nipping and conveying the recording paper on which the symbol is printed;
The inclination of the recording paper on which the original image conveyed from the image forming apparatus is copied and the symbol is printed is corrected by tilting the recording paper with the symbol as a mark. A first cutting part for cutting the end part;
A second conveying means for conveying the recording paper having the leading edge and the trailing edge cut by the first cutting section;
A second cutting unit that cuts both end portions of the recording sheet, the leading end portion and the trailing end portion that have been transported from the first cutting portion;
A cutting device comprising:
An image forming system comprising:
The first cutting section is
First detection means for detecting the symbol printed on a recording sheet conveyed from the image forming apparatus at a cutting position;
When the recording sheet is conveyed while being inclined while supporting the first conveying unit, the first detecting unit simultaneously detects symbols printed at two positions at the leading end in the conveying direction of the recording sheet. First correction means for correcting the inclination by tilting the recording paper,
When the first detection means simultaneously detects two symbols at the leading end in the conveyance direction of the recording paper, the leading edge of the recording paper is cut, and the recording paper with the leading edge cut is cut into the first recording paper. Transported by one transport means, and the first detection means comprises a first cutting means for cutting the trailing edge of the recording paper when detecting at least one symbol of the trailing edge,
The second cutting part is
A second detecting means for stopping a predetermined position and detecting a symbol printed on the leading end portion of the recording paper having the leading end portion and the trailing end portion cut by the first cutting portion;
A second cutting means for cutting the end of the recording paper in the width direction;
A moving device that moves the second detection means stopped at the predetermined position in a direction opposite to the conveyance direction of the recording paper until the symbol printed on the rear end of the recording paper is detected;
The cutting position on the downstream side in the recording paper transport direction of the second cutting means moved to the vicinity of the position for cutting the end in the width direction of the recording paper, and the width of the recording paper detected by the second detection means The position of the symbol printed on the leading edge of the recording paper in the direction is compared, and if there is a deviation, the cutting position on the downstream side in the recording paper conveyance direction of the second cutting means is moved in the width direction to Correct it so that it matches the position of the symbol printed on the tip,
Printing on the cutting position upstream of the second cutting means in the recording paper conveyance direction and the trailing edge of the recording paper in the width direction of the recording paper detected by the second detection means moved by the moving device If there is a deviation, the position of the symbol printed on the rear end portion by moving the cutting position upstream of the second cutting means in the recording paper conveyance direction in the width direction is compared. Second correction means for correcting to match
An image forming system comprising: A post-processing device for receiving the recording paper on which the symbol discharged from the image forming apparatus is printed ,
The image forming system according to claim 1, wherein the cutting device is incorporated in the post-processing device .

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