Patent Grant
6983931
1. Field of the Invention
The present invention relates to a binding apparatus, and in particular relates to a binding apparatus that is connected with a sheet discharging part of an image forming apparatus, such as a printer and a copier, and that folds a sheet received from the image forming apparatus and binds stacked folded sheets at the folded side parts of the folded sheets.
2. Discussion of the Background
A binding technology used in producing weekly magazines is well known. After printed sheets are stacked and jogged, the stacked printed sheets are stapled at their center portions by a stapling device. The stapled sheets are then folded at their stapled portions. Because the stapled sheets are folded at their stapled portions, the side edges of the folded sheets, opposite the stapled and folded side of the folded sheets, are not uniform. Therefore, the side edges of the folded sheets, opposite the stapled and folded side, are cut off by a cutting apparatus so as to be uniform.
A binding apparatus is known to be connected with a copying machine, downstream of a sheet discharging part of the copying machine in the sheet discharging direction. The binding apparatus sorts or collates sheets carrying an image on one or both sides of the sheets, which have been discharged from the copying machine, and then jogs and binds the sheets into a stack of sheets.
In the binding technology used in producing a weekly magazine, as described above, the side edges of the folded sheets, opposite the stapled and folded side of the folded sheets, must be cut off by a cutting apparatus so as to be uniform. Noise is produced when the side edges of the folded sheets are cut off by the cutting apparatus. The cutting apparatus is relatively large, heavy and expensive. The life of a knife used in the cutting apparatus is relatively short. Further, the consumption of electric power is relatively large. When the number of printed sheets, which must be folded, is large, the folding apparatus may not sufficiently fold the sheets.
A binding apparatus used in conjunction with a copying machine generally stacks sheets, which have been received from the copying machine, without folding each of the sheets, into a stack of sheets, and then staples the stacked sheets. The stacked sheets are stapled at edge portions of the sheets at one side. Therefore, when a sheet of the stack of stapled sheets is pulled, the stapled part of the pulled sheet is easily torn, so that the pulled sheet is taken apart from the stack of stapled sheets. For avoiding this problem, the stapling position for a stack of sheets must be located well inside of the stack of sheets toward the center portion thereof. This may result in stapling the sheets at a part of the image area of each sheet, so that the inconvenience may be caused such that a part of the image at the stapled part of each sheet cannot be seen. For avoiding the inconvenience, the image must be formed on each sheet with a relatively large margin for stapling, which then reduces the area in each sheet where an image can be formed.
The present invention has been made in view of the above-discussed and other problems and addresses the above-discussed and other problems.
Preferred embodiments of the present invention provide a novel binding apparatus of a relatively small size, that folds a sheet, and binds stacked folded sheets so that side edges of the bound folded sheets are uniform. The preferred embodiments of the present invention further provide a novel binding apparatus and method that folds a sheet, carrying images of two pages on one side of the sheet and another images of another two pages on the other side of the sheet, at a center portion of the sheet, and that binds folded sheets, which are stacked, at the folded side parts of the folded sheets. The preferred embodiments of the present invention further provide a novel binding apparatus that reliably binds stacked folded sheets without loosening the stack. The preferred embodiments of the present invention further provide a novel binding apparatus that binds folded sheets into a stack of folded sheets so that each of the bound folded sheets is hard to be torn so as not to be easily pulled out of the stack of folded sheets. The preferred embodiments of the present invention further provide a novel binding apparatus and method that binds sheets with a relatively small binding margin so that a relatively large area of each sheet can be used for forming an image thereupon. The preferred embodiments of the present invention further provide a novel sheet folding apparatus that reliably folds a sheet. The preferred embodiments of the present invention further provide a novel jogging apparatus that reliably jog sheets which have been folded at their center portions. The preferred embodiments of the present invention further provide a novel image forming and binding system that allows to form images of image or document data of two pages on one side of a sheet and another images of another two pages on the other side of the sheet, fold the sheet at a center portion thereof, and bind the folded sheets, which are stacked, at the folded side parts of the folded sheets.
According to a preferred embodiment of the present invention, a binding apparatus includes a receiving device configured to receive a sheet from outside and convey the sheet, and a sheet folding device configured to fold the sheet, conveyed by the receiving device, in two at a center portion thereof in a direction the sheet is conveyed, so as to be a folded sheet, and convey the folded sheet with the folded portion thereof being a leading edge of the folded sheet. A jogging device includes a jogging table and is configured to receive and jog the folded sheet, conveyed by the sheet folding device, one after another, so as to be stacked into a stack of folded sheets on the jogging table. A binding device is configured to bind the stack of folded sheets stacked on the jogging table at an edge portion of the stack of folded sheets at the side where the folded portion of each folded sheet of the stack of folded sheets is located. A discharging device is configured to discharge the bound stack of folded sheets.
The binding apparatus may further include a controller to control an operation of the apparatus. The controller receives information on a size of the sheet conveyed from outside. Further, the sheet folding device includes a guiding device configured to guide the sheet conveyed by the receiving device, and a sheet folding/pressing device configured to fold the sheet conveyed by the receiving device and press the folded sheet. The guiding device includes a stopping device configured to stop the sheet being conveyed by the receiving device to be conveyed, and a position the stopping device stops the sheet to be conveyed is set by the controller according to the information on the size of the sheet so that the sheet is folded at the center portion of the sheet by the sheet folding/pressing device. The sheet being conveyed by the receiving device is stopped to be conveyed by the stopping device, so that the center portion of the sheet is downwardly slackened, the slackened centered portion of the sheet is pinched into the sheet folding/pressing device, and thereby the sheet is folded in two at the center portion thereof by the sheet folding/pressing device.
The sheet folding device may further include a detect device configured to detect a leading edge of the sheet guided by the guiding device, a pushing device configured to push the slackened center portion of the sheet toward the sheet folding/pressing device, and a pushing device moving device configured to move the pushing device downwardly toward the sheet folding/pressing device so as to push the slackened center portion of the sheet toward the folding/pressing device and upwardly so as to separate from the sheet folding/pressing device. The pushing device moving device moves the pushing device downwardly to push the slackened center portion of the sheet toward the sheet folding/pressing device at a predetermined timing after detection of the leading edge of the sheet with he detect device, so that the slackened center portion of the sheet is pushed by the pushing device so as to be pinched into and thereby the sheet is folded in two at the center portion thereof by the sheet folding/pressing device.
The pushing device may include a saw-toothed knife to push the center portion of the sheet, so that the sheet is perforated at the pushed center portion of the sheet when the saw-toothed knife pushes the center portion of the sheet.
The sheet folding device may include a sheet folding/pressing device having a pair of sheet folding rollers and a pair of supplementary pressing rollers. The pair of supplementary pressing rollers is arranged downstream of the pair of sheet folding rollers in the direction the folded sheet is conveyed and is angled relative to the pair of sheet folding rollers, and a distance between a nip portion of the pair of supplementary rollers and a nip portion of the pair of the sheet folding rollers at a position corresponding to a widthwise edge of the folded sheet, at a side of a widthwise direction where the pair of the supplementary rollers and the pair of sheet folding rollers are farther separated from each other, is shorter than a length of the folded sheet in the direction the folded sheet is conveyed.
The jogging device may include a leading edge stopping device configured to stop the folded sheet to be conveyed at the leading edge thereof, and a left side jogging device configured to jog the folded sheet with respect to a left side of the folded sheet in a direction the folded sheet is conveyed, a right side jogging device configured to jog the folded sheet with respect to a right side of the folded sheet, and a rear side jogging device configured to jog the folded sheet with respect to a rear side of the folded sheet, each including an upper guide member to guide the folded sheet being conveyed by the sheet folding device toward the jogging table and a jogging member to jog the folded sheets on the jogging table, The upper guide member of each of the left side, right side and rear side jogging devices is configured to swing between a horizontal position where the upper guide member is substantially horizontal so as to hold down a previously conveyed folded sheet on the jogging table and so that the folded sheet being conveyed by the sheet folding device slides over an upper surface of the upper guide member to be stopped by the leading edge stopping device and a slanted position where the upper guide member is upwardly slanted. Each of the left side, right side and rear side jogging devices is configured to move to a first position where the upper guide member thereof in the horizontal position separates from the folded sheet carried on the upper surfaces of the upper guide members of the left side, right side and rear side jogging devices and to a second position where the jogging member thereof is in a position corresponding to a size of the folded sheet being conveyed by the folding device, which is determined by the controller according to the information on the size of the sheet. When the folded sheet is conveyed to the jogging device by the sheet folding device, each of the left side, right side and rear side jogging devices is in the second position and the upper guide member of each of the left side, right side and rear side jogging devices is in the horizontal position.
After the folded sheet has been conveyed by the folding device to the jogging device so as to slide over the upper surfaces of the upper guide members of the left side, right side and rear side jogging devices, each of the left side, right side and rear side jogging devices moves, with the upper guide member thereof kept in the horizontal position, to the first position, where the upper guide member of each of the left, right and rear side jogging devices is swung to the slanted position, and each of the left, right and rear sides jogging devices is then moved to the second position, where the upper guide member of each of the left side, right side and rear side jogging devices is returned to the horizontal position.
The leading edge stopping device may include a leading edge binding position adjusting device configured to change a position the leading edge stopping device stops the folded sheet to be conveyed so that a position in the folded sheet relative to the leading edge thereof where the binding device binds the folded sheet is changed.
The folding device may include a detect device configured to detect that the folded sheet is discharged toward the jogging device, and the jogging device may include a sheet center thrusting device configured to swing between a horizontal position to downwardly thrust the folded sheet carried on the upper surfaces of the upper guide members of the left side, right side and rear side jogging devices and a slanted position where the sheet center thrusting device is upwardly slanted, and a sheet center thrusting device driving device configured to drive the sheet center thrusting device so as to swing between the horizontal position and the slanted position.
The sheet center thrusting device driving device drives the sheet center thrusting device downwardly to move to the horizontal position so as to downwardly thrust the folded sheet carried on the upper surfaces of the upper guide members of the left side, right side and rear side jogging devices, after the detect device detects that the folded sheet has been discharged toward the jogging device, and to swing back to the slanted position, after each of the left side, right side and rear side jogging devices in the second position moves toward outside to the first position, moves again toward inside to the second position after the upper guide member of each of the left side, right side and rear side jogging devices is swung to the slanted position, stops at the second position, and the upper guide member of each of the left side, right side and rear side jogging devices is swung to the horizontal position.
When the binding device binds the stack of folded sheets stacked on the jogging table, the jogging member of each of the left side, right side and rear side jogging devices is in the second position, the upper guide member of each of the left side, right side and rear side jogging devices is in horizontal position, and the sheet center thrusting device is in the horizontal position.
According to another preferred embodiment of the present invention, a sheet folding apparatus includes a pair of sheet folding rollers and a pair of supplementary pressing rollers. The pair of supplementary pressing rollers is arranged downstream of the pair of sheet folding rollers in a sheet conveyance direction and is angled relative to the pair of sheet folding rollers, and a distance between a nip portion of the pair of supplementary rollers and a nip portion of the pair of the sheet folding rollers at a position corresponding to a widthwise edge of the sheet, at a side of a widthwise direction where the pair of the supplementary rollers and the pair of sheet folding rollers are farther separated from each other, is shorter than a length of the folded sheet in the sheet feeding direction. A portion of a sheet is pinched into the pair of sheet folding rollers so that the sheet is folded in two by the pair of sheet folding rollers, and then the folded sheet is pressed by the pair of supplementary pressing rollers, so that the folded portion of the folded sheet is firmly folded.
According to another preferred embodiment of the present invention, a jogging apparatus includes a jogging table on which a sheet may be stacked one after another, and a leading edge stopping device configured to stop a sheet conveyed from outside at a leading edge thereof, a left side jogging device configured to jog the sheet with respect to a left side of the sheet in a direction the sheet is conveyed, a right side jogging device configured to jog the sheet with respect to a right side of the sheet, and a rear side jogging device configured to jog the sheet with respect to a rear side of the sheet. Each of the left side, right side, and rear side jogging devices includes an upper guide member to guide the sheet conveyed from outside onto the jogging table one after another so as to be stacked into a stack of sheets on the jogging table and a jogging member to jog the stack of sheets on the jogging table. The upper guide member of each of the left side, right side and rear side jogging devices is configured to swing between a horizontal position where the upper guide member is substantially horizontal so as to hold down a previously conveyed sheet on the jogging table and so that the sheet being conveyed from outside slides over an upper surface of the upper guide member to be stopped by the leading edge stopping device and a slanted position where the upper guide member is upwardly slanted. Each of the left side, right side and rear side jogging devices is configured to move to a first position where the upper guide member thereof in the horizontal position separates from the sheet carried on the upper surfaces of the upper guide members of the left side, right side and rear side jogging device and to a second position where the jogging member thereof is in a position corresponding to a size of the sheet being conveyed from outside. When the sheet is conveyed, each of the left side, right side and rear side jogging devices is in the second position and the upper guide member of each of the left side, right side and rear side jogging devices is in the horizontal.
According to another preferred embodiment of the present invention, an image forming and binding system includes an image formation controller configured to generate and transmit image or document data with page and sheet size information and printing and binding instructions thereof, and an image forming apparatus configured to form images of the image or document data received from the image formation controller on both sides of a sheet according to the page and sheet size information and the printing and binding instructions and discharge the sheet, and a binding apparatus configured to bind sheets received from the image forming apparatus. The image forming apparatus forms a second page image and a third page image of images of four pages of the image or document data on a first side of the sheet, which upwardly faces when the sheet is exited from the image forming apparatus, with the second page image at a leading edge side of the sheet in a direction the sheet is conveyed, and a first page image and a fourth page image of the images of four pages on a second side of the sheet, which downwardly faces when the sheet is exited from the image forming apparatus, with the first page image at the leading edge side of the sheet in the direction the sheet is conveyed, and the image formation controller controls the image forming apparatus to form the images of the image or document data starting from last four pages of the image or document data. The binding apparatus includes a controller to control an operation of the binding apparatus. The controller receives the sheet size information and the binding instruction from the image formation controller. A receiving device of the binding apparatus is configured to receive the sheet discharged by the image forming apparatus and convey the sheet. A sheet folding device is configured to fold the sheet, conveyed by the receiving device, in two at a center portion thereof in the direction the sheet is conveyed according to the sheet size information, and convey the folded sheet. A jogging device includes a jogging table and is configured to receive and jog the folded sheet, conveyed by the sheet folding device, one after another, so as to be stacked into a stack of folded sheets on the jogging table according to the sheet size information. A binding device is configured to bind the stack of folded sheets stacked on the jogging table at an edge portion of the stack of folded sheets at the side where the folded portion of each folded sheet of the stack of folded sheets is located according to the binding instruction, and a discharging device configured to discharge the bound stack of folded sheets.
According to another preferred embodiment of the present invention, a method of binding sheets includes receiving a sheet from outside and conveying the sheet; folding the conveyed sheet in two at a center portion thereof in a direction the sheet is conveyed so as to be a folded sheet and conveying the folded sheet with the folded portion of the fold sheet being a leading edge of the folded sheet with a sheet folding device; receiving and jogging the conveyed folded sheet one after another so as to be stacked into a stack of folded sheets with a receiving/jogging device; binding the stack of stacked folded sheets at an edge portion of the stack of folded sheets at the side where the folded portion of each folded sheet of the stack of folded sheets is located with a binding device; and discharging the bound stack of folded sheets.
The binding method may further include receiving information on a size of the sheet, and the folding/conveying may include receiving and guiding the conveyed sheet, setting a position where the conveyed sheet is stopped to be conveyed according to the size of the sheet so that the sheet is folded by the sheet folding device at the center portion of the sheet, and stopping the sheet to be conveyed at the position, so that the center portion of the sheet is downwardly slackened, the slackened center portion of the sheet is pinched into the sheet folding device, and thereby the sheet is folded in two at the center portioned of the sheet by the sheet folding device.
The folding/conveying may further include detecting a leading edge of the sheet, and pushing the slackened center portion of the sheet toward the sheet folding device with a pushing device at a predetermined timing after the detection of the leading edge of the sheet, so that the slackened center portion of the sheet is pinched into the sheet folding device.
In the above-described method, the pushing device may include a saw-toothed knife to push the slackened center portion of the sheet. In this case, the pushing includes perforating the sheet at the pushed center portion of the sheet with the saw-toothed knife.
In the above-described method, the sheet folding device may include a pair of sheet folding rollers and a pair of supplementary pressing rollers. The pair of supplementary pressing rollers is arranged downstream of the pair of sheet folding rollers in the direction the folded sheet is conveyed and is angled relative to the pair of sheet folding rollers, and a distance between a nip portion of the pair of supplementary rollers and a nip portion of the pair of the sheet folding rollers at a position corresponding to a widthwise edge of the folded sheet, at a side of a widthwise direction where the pair of the supplementary rollers and the pair of sheet folding rollers are farther separated from each other, is shorter than a length of the folded sheet in the direction the folded sheet is conveyed. In this case, the folding/pressing includes folding the sheet with the pair of sheet folding rollers and pressing the folded sheet with the pair of supplementary pressing rollers.
The binding method may further include receiving information on a size of the sheet and determining a size of the folded sheet folded at the center of the sheet, and the jogging device may include a leading edge stopping device to stop the folded sheet, an upper guide member to guide the folded sheet conveyed by the sheet folding device and a jogging member to jog the folded sheet. In this case, the receiving/jogging includes, sliding the conveyed folded sheet over an upper surface of the upper guide member of the jogging device, which is in a substantially horizontal position, to be stopped by the leading edge stopping device and to be carried on the upper surface of the upper guide member, moving the jogging device to a first position where the folded sheet carried on the upper surface of the upper guide member separates from the upper guide member to fall onto the jogging table, swinging the upper guide member from the horizontal position to a slanted position where the upper guide member is upwardly slanted, and moving the jogging device to a second position where the jogging member of the jogging device is in a position corresponding to the size of the folded sheet being received.
In the above-described method, the folding device may include a detect device to detect that the folded sheet is discharged toward the jogging device and a sheet center thrusting device to downwardly thrust the folded sheet carried on the upper surface of the upper guide member of the jogging device. In this case, the receiving/jogging further includes detecting that the folded sheet is discharged toward the jogging device with the detect device, and swinging the sheet center thrusting device between a substantially horizontal position where the sheet center thrusting device downwardly thrusts the folded sheet carried on the upper surface of the upper guide member of the jogging device and a slanted position where the sheet center thrusting device is upwardly slanted.
In the above-described method, in the binding, the jogging member of the jogging device is in the second position, the upper guide member is in the horizontal position, and the sheet center thrusting device is in the horizontal position.
The receiving/jogging may further include stopping the folded sheet to be conveyed at a leading edge of the folded sheet so that the folded sheet is jogged relative to the binding device, and adjusting a position to stop the folded sheet so that that a position in the folded sheet relative to the leading edge thereof where the binding device binds the stack of folded sheet is changed.
A more complete appreciation of the present invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in conjunction with accompanying drawings, wherein:
Referring now to the drawings, wherein like reference numerals designate identical or corresponding parts throughout the several views, preferred embodiments of the present invention are described.
The image formation controller 1 is for example a personal computer including a display, a keyboard, a scanner, etc. The image formation controller 1 generates image or document data by inputting, or reading an image or a document with the scanner, and editing the data. The image formation controller 1 sets the page for the image or document data, sets various printing and binding instructions for printing the data and binding the printed sheets, e.g., the number of printed sets, the size of a sheet for printing, the stapling position, etc. Further, the image formation controller 1 displays a selected operational mode, the status of the system, the printer 2, the binding apparatus 3 etc., with the display.
The image formation controller 1 stores the image or document data, read by the scanner, sent from a separate inputting apparatus or via a network, or generated by the image formation controller 1. The image formation controller 1 edits the stored image or document data, for example, changes the pages of the stored image or document data.
The printer 2 forms an image of the data, sent from the image formation controller 1, on a sheet conveyed from a sheet feeding part of the printer 2. The printer 2 may use such image formation methods as an ink jet system and electrophotography.
The printer 2 reverses the sheet, after formation of an image on one side of the sheet, and then conveys the sheet to the image formation part of the printer 1 for forming another image on the other side of the sheet. The sheet carrying the images on both sides thereof is discharged from the discharging part of the printer 2.
Referring to
The image formation controller 1 controls the printer 2 to form images of image or document data such that, when two images for two pages of the data are formed on one side of the sheet 4 and another two images for another two pages of the data are formed on the other side of the sheet 4, as illustrated in the left portion of
The binding apparatus 3 stacks the folded sheet 5 with the first page image of four images of four pages on the top surface of the folded sheet 5 as described. Accordingly, by controlling the printer 2 to print image or document data starting from the last four pages of the data, when the image or document data is printed on a sheet 4 by the printer 2, and the sheet 4 is folded into a folded sheet 5, the fold sheet 5 is stacked one after another into a stack of folded sheets 6 and the stack of folded sheets 6 is bound and discharged by the binding apparatus 3, the images of the data are in right order of pages, i.e., the first page image is on the top surface of the stack of folded sheets 6. For example, when the image or document data is the one of 12 pages, the image formation controller controls the printer 2 to first form the tenth page image and the eleventh page image on the upper surface of a first sheet, and the ninth page image and the twelfth page image on the back surface of the first sheet, and then to form the sixth page image and the seventh page image on the upper surface of a second sheet and the fifth page image and the eighth page on the back surface of the second sheet, and so on. A computer program for the image formation controller to control the printer 2 as described above can be practiced by an ordinary skilled programmer.
The binding apparatus 3 includes, as illustrated in
The sheet receiving part 11 includes, as illustrated in
As illustrated in
A pulley 22 fixed to the entrance motor 21 and the pulley 23 are connected with each other via a belt 24. When the entrance motor 21 starts to rotate upon detection of the sheet 4 with the sheet sensor 46, the entrance roller 33, the sheet folding roller pair 42, and the supplementary pressing roller pair 45 start to rotate at the same time.
Thus, the entrance roller 33 and the sheet folding roller pair 42 rotate at the same circumferential speed to convey the sheet 4, conveyed from outside, to the sheet guiding part 12.
Referring back to
The upper guide plate 36 and the lower guide plate 37 may be substantially on a plane extending from the upper surface of the sheet receiving table 31. However, as illustrated in
Further, the upper guide plate 36 and the lower guide plate 37 are spaced from each other so that the sheet 4 conveyed by the entrance roller 33 slides into between the upper guide plate 36 and the lower guide plate 37. A window is provided in the upper guide plate 36 and the lower guide plate 37, and a sheet stopper 40 is arranged so as to slidably engage with the window to stop the sheet 4 from sliding between the upper guide plate 36 and the lower guide plate 37. The sheet leading edge sensor 39 is arranged in front of the sheet stopper 40 in the sheet conveying direction.
An adjusting rack 157 is fixed to the sheet stopper 40. An adjusting pinion 156, fixed to an adjusting axis 38, engages with the adjusting rack 157. With rotation of the adjusting axis 38, the adjusting rack 157 moves, so that the sheet stopper 40 slidably moves along the window of the upper guide plate 36 and the lower guide plate 37.
As illustrated in
The adjusting worm 153 is fixed to the adjusting axis 155, and is rotatably supported by a motor mounting plate table 158 via a bearing. An adjusting gear 152 is fixed at one end of the adjusting gear 155, and the adjusting gear 152 engages with an adjusting gear 151 fixed to an axis of an adjusting motor 150, which is fixed to the motor mounting table 158. With rotation of the adjusting motor 150, the adjusting axis 38 rotates, so that the sheet stopper 40 moves.
Referring back to
The position of the sheet stopper 40 is determined by the controller 19 according to the information as to the size of the sheet 4, sent from the image formation controller 1, so that the sheet 4 slackens at the center portion thereof, and the slackened center portion is pinched into the sheet folding roller pair 42. Thereby, the sheet 4 is folded at the center portion thereof.
The sheet folding part 13 includes, as illustrated in
The sheet folding part 13 further includes, as illustrated in
When operating the knife unit 35, after the sheet leading edge sensor 39 detects a leading edge of the sheet 4, at a predetermined timing the solenoid 47 operates so as rotate the knife unit 35 around the axis 41 in the clockwise direction. Thereby, the sheet 4 is pushed by the knife unit 35 at the slackened center portion thereof toward the sheet folding roller pair 42, so that the pushed slackened center portion of the sheet 4 is pinched into the sheet folding roller pair 42.
The edge of the knife 34 is formed, for example in a saw-toothed shape. When the knife 34 is saw-toothed, the sheet 4 is perforated at the pushed portion of the sheet 4, so that the sheet 4 is easily folded at the perforated portion of the sheet 4.
Once the slackened and pushed center portion of the sheet 4 is pinched into the sheet folding roller pair 42, the solenoid 47 is turned off, and at the same time the knife unit 35 is released to return to the position illustrated in
The sheet 4 may be folded at the center portion thereof, without using the knife unit 35 having the knife 34. However, by use of the above-described knife unit 35, the sheet 4 can be more reliably folded at the center portion thereof with the sheet folding roller pair 42.
The supplementary pressing part 14 includes, as illustrated in
The supplementary pressing roller pair 45 is arranged so as to be angled relative to the sheet folding roller pair 42, as illustrated in
For conveying a folded sheet 5 without curving the conveying direction while applying a pressure to the folded portion of the folded sheet 5 by the supplementary pressing roller pair 45, the supplementary pressing roller pair 45 must complete applying of the pressure to the folded portion of the folded sheet 5, before the rear end of the folded sheet 5 passes through the sheet folding roller pair 42, i.e., while the sheet folding roller pair 42 is pinching the folded sheet 5. Once the supplemental pressing roller pair 45 completes applying the pressure to the folded portion of the folded sheet 5, then the force of the supplementary pressing roller 45 to curve the conveyance direction of the folded sheet 5 decreases, because the pressure being applied to the folded sheet 5 by the supplementary roller pair 45 is uniform in the widthwise direction of the folded sheet 5, so that the folded sheet 5 is correctly discharged toward a jogging table 57 (
Practically, the supplementary pressing roller pair 45 can be arranged so as to be angled relative to the sheet folding roller pair 42 between about 1° and about 20°. If the supplementary pressing roller pair 45 is excessively angled relative to the sheet folding roller pair 42, e.g., more than about 20°, supporting of the supplementary pressing roller pair 45 at the side plate of the main body of the apparatus is hard.
When the distance between a nip portion of the sheet folding roller pair 42 and a nip portion of the supplementary pressing roller pair 45 at a position corresponding to a widthwise edge of the sheet 5 at a side, in the widthwise direction, where the supplementary pressing roller 45 and the sheet folding roller pair 42 are farther separated from each other, is shorter than the length of the folded sheet 5 in the sheet conveying direction, then pressing of the folded portion of the sheet 4 with the supplementary pressing roller pair 45 is completed while the sheet folding roller pair 42 is pinching the folded sheet 5, so that the folded sheet 5 is correctly discharged.
Referring back to
The sheet center thrusting mechanism 200 includes, as illustrated in
Referring now to
In
The cam plate 106 fixed to the stapling position adjusting knob 105 engages with the roller 104 of the arm 107. The position of the position determining plate 60 is adjusted according to the position of the stapling position adjusting knob 105 to stop rotating.
The arm 107 rotatably supports a link 103 at one end of the link 103, and the other end of the link 103 is connected with a solenoid 101. With the operation of the solenoid 101, the arm 107 connected with the link 103 rotates in the counterclockwise direction. Thereby, the position determining plate 60 fixed to an axis 61 of the arm 107 swings in the counterclockwise direction, so that, in
The jogging table part 202 includes, as illustrated in
Further, referring to
The jogging plate part 202 further includes, as illustrated in
The jogging plate rack 82 includes, as illustrated in
The hole 119 of the jogging plate rack 82 is provided for moving the lower plate 99 of the left side upper guide 76, so that the left side upper guide 76 is in a substantially horizontal position (x position) or in an upwardly slanted position (y position), illustrated
In
As illustrated in
An end plate part that jogs the folded sheet 5, which have been discharged toward the jogging table 57, with respect to front and rear sides of the folded sheet 5 in the direction the folded sheet 5 is conveyed, in cooperation with the position determining plate 60 of the binding position determining mechanism 201, includes, as illustrated in
Referring to
The jogging table upward/downward moving mechanism 203 further includes an arm 115 and an interrupting plate 114, which are fixed to and which rotate together with an axis fixed to an axis of a motor 116, which is fixed to the side plate of the main body, and a link 117 connecting the arm 115 and the arm 111 with each other.
A sensor 113 and a sensor 112 are arranged so as to oppose each other via the axis of the motor 116. When the interrupting plate 114 rotates together with the axis of the motor 116, the interrupting plate 114 interrupts the sensor 113 and the sensor 112.
When the arm 115, which is integrated with the axis of the motor 116, rotates, the link 117 is reciprocally moved to swing the arm 111. When the arm 111 is in the left side end position (p) in
Referring back to
The stack discharging part 17 includes, as illustrated in
The exit part 18 includes, as illustrated in
Now, the operation of the binding apparatus 3 is described.
When the power of the binding apparatus 3 is turned on, each part of the binding apparatus 3 operates so as to be ready for receiving a sheet. As illustrated in
When a binding instruction including the information on the size of the sheet 4 is received by the controller 19, the sheet stopper 40 of the sheet guiding part 12 is moved to the position corresponding to the size of the sheet 4 according to the information on the size of the sheet 4 so that the sheet 4 is folded at the center portion thereof by the sheet folding part 13. Further, with respect to the left side jogging plate 74 and the right side jogging plate 73 on the jogging table 57, illustrated in
Further, referring to
In
The sheet 4 is conveyed between the lower guide plate 37 and the upper guide plate 36, and when the sheet leading edge detect sensor 39 detects the leading edge of the sheet 4, the controller 19 adjusts the position of the sheet stopper 40, which has been set according to the size of the sheet 4 as described above, again, according to the detection so that the sheet 4 is folded precisely at the center portion thereof. This adjustment is made because the actual size of the sheet 4 sometime differs from the standard size, for example, by about ±2 mm in an A3 size sheet. Further, the solenoid 47 is operated a predetermined period of time after the detection.
The sheet 4 is stopped by the sheet stopper 40 after the leading edge of the sheet 4 passes the sheet leading edge detect sensor 39. At that time, because the entrance roller 33 and the sheet folding roller pair 42 are rotating, a part of the sheet 4 which is out of the lower guide plate 37 and the upper guide plate 37 is downwardly slackened. Further, the predetermined time after the sheet leading edge detect sensor 39 detects the leading edge of the sheet 4, the solenoid 47 is operated to move the knife unit 35 in the clockwise direction to push the slackened portion of the sheet 4 with the knife 34 of the knife unit 35 toward the sheet folding roller pair 42, so that the slackened pushed portion of the sheet 4 is pinched into between the sheet folding roller pair 42, and thereby the sheet 4 is folded by the sheet folding roller pair 42. The sheet 4 can be folded by the sheet folding roller pair 42 without using a knife unit mechanism, however, the precision of folding the sheet 4 at the center portion of the sheet 4 can be increased by using the knife unit mechanism, and thereby inferior folding of the sheet 4 can be decreased.
The sheet 4, which has been folded into a folded sheet 5, is pressed and is conveyed by the sheet folding roller pair 42 to pass the sheet sensor 44 and to be conveyed into between the supplementary pressing roller pair 45. The folded sheet 5 is further pressed and is conveyed by the supplementary pressing roller pair 45 to be discharged toward the jogging table 57.
Before the folded sheet 5 is discharged toward the discharging table 57, the left side jogging plate 74, the right side jogging plate 73, and the end plate 95 have been placed in the position to jog the folded sheet 5 on the jogging table 57, and the right side upper guide 76, the right side upper guide 75, and the rear end thrusting plate 78 are respectively in the horizontal positions, as described above. The folded sheet 5 discharged toward the jogging table 57 slides over the rear end thrusting plate 78 of the end plate 95, the left side upper guide 76 of the left side jogging plate 74, and the right side upper guide 75 of the right side jogging plate 73, to be stopped by the position determining plate 60.
Referring to
Thereafter, referring to
Immediately after the left side position sensor 83 and the end plate position sensor 97 have been interrupted, the motor 88 and the motor 91 start to rotate in the reverse direction, so that the left side jogging plate 74, the right side jogging plate 73 (not shown in
After the left side jogging plate 74, the right side jogging plate 73, and the end plate 95 return to the jogging position for the folded sheet 5, the motor 88 and the motor 91 rotate in the reverse direction for the allowance distance L (
After the left side jogging plate 74, the right side jogging plate 73, and the end plate 95 moves to the jogging position for the folded sheet 5 so as to jog the folded sheet 5 to the position and the left side upper guide 75, the right side upper guide 76, and the rear edge thrusting plate 78 move to the horizontal positions (x) to be stopped in the positions, the solenoid 55 is released so that the sheet center thrusting plate 50 returns to the upwardly slanted position (e) (
The binding apparatus 3 then receives a subsequent sheet 4, and the sheet 4 is folded at the center portion thereof, to be a folded sheet 5. The folded sheet 5 is then conveyed by the supplementary pressing roller pair 45, so as to be discharged toward the previously conveyed folded sheet 5 on the jogging plate 57.
The sheet sensor 44 detects the rear edge of the discharged folded sheet 5, and after a predetermined period of time, the sheet center thrusting plate 50 rotates to the horizontal position (f) (Fi. 7) so as to thrust the folded sheet 5 carried on the left side upper guide 75, the right side upper guide 76, and the rear edge thrusting plate 78, and thereafter the left side jogging plate 74, the right side jogging plate 73, and the end plate 75 start to move toward outside in
Thus, the sheet center thrusting plate 50 thrusts each of the folded sheets 5, received one by one on the jogging table 47, from above, and the left side jogging plate 74, the right side jogging plate 73, and the end plate 95 jog the folded sheets 5, respectively. Further, the left side upper guide 76, the right side upper guide 75, and the rear edge thrusting plate 78 suppress bulges of the folded sheets 5. Furthermore, the sheet center thrusting plate 50 upwardly rotates, so that the upper surfaces of the left side upper guide 76, the right side upper guide 75 and the rear edge thrusting plate 78 function as the guides for the folded sheet 5 which is subsequently conveyed thereto.
After a last sheet 4 of a predetermined number of sheets 4 according to the binding instruction is folded into a last folded sheet 5 and the last folded sheet 5 is stacked on the jogging table 57, the sheet center thrusting plate 50 thrusts the last folded sheet 5 from above, and the left side jogging plate 74, the right side jogging plate 73, and the end plate 95 jog the last folded sheet 5 to the jogging position, with the left side upper guide 76, the right side upper guide 75, and the rear edge thrusting plate 78 kept in the horizontal positions (x) so as to hold a stack of folded sheets 6, the stapler 121 staples the stack of folded sheets 6 in the (u) position of
When the stapling is completed at the (v) position, the sheet center thrusting plate 50 returns to the (e) position, and the end plate 95 on the jogging table 57 starts to move toward outside, to be stopped after moving a predetermined distance. At the same time, the solenoid 101 is turned on, so that the position determining plate 60 moves from the (k) position to the (l) position (
In
The sensor 58 detects that stack of folded sheets 6 is discharged from the jogging table 57, so that the stapling operation is completed. The binding apparatus 3 then prepares for receiving a next sheet 4 conveyed from the printer 4.
Numerous additional modifications and variations of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the present invention may be practiced otherwise than as specifically described herein.
The present application claims priority and contains subject matter related to Japanese Patent Application No. 2000-213730 filed in the Japanese Patent Office
| Number | Date | Country | Kind |
|---|---|---|---|
| 2000-213730 | Jul 2000 | JP | national |
This is a divisional of application Ser. No. 09/896,737, filed Jun. 29, 2001, now U.S. Pat. No. 6,755,410.
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| Number | Date | Country | |
|---|---|---|---|
| 20040212134 A1 | Oct 2004 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 09896737 | Jun 2001 | US |
| Child | 10849630 | US |
