JP3609493B2 - Image forming apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, FinishThe present invention relates to an image forming apparatus that automatically performs a dividing operation.
[0002]
[Prior art]
As one of image forming apparatuses, a rotatable plate cylinder formed by winding a plurality of layers of resin or metal mesh mesh screens on a porous support cylindrical body, and a thermoplastic resin film (thickness is 1 to 2 μm) And a master plate having a laminate structure in which a porous support made of Japanese paper fiber, synthetic fiber, or a mixture of Japanese paper fiber and synthetic fiber is bonded to the master film. The surface is brought into contact with the heating element of the thermal head to operate the thermal head in the main scanning direction (direction orthogonal to the master transport direction), and the master is moved in the sub scanning direction (master transport direction) by transport means such as a platen roller or transport roller. After the heated perforated master is wound around the plate cylinder, the ink is supplied from the ink supply means provided inside the plate cylinder and pressed. The printing paper is continuously pressed against the master on the outer peripheral surface of the plate cylinder by pressing means such as a roller, and the ink is oozed out from the opening portion of the plate cylinder and the master punching portion, and the ink is transferred to the printing paper for printing. Digital stencil printing devices that perform are well known.
[0003]
In the current market, a fully automatic type stencil printing apparatus that automatically performs a plate making operation, a printing operation, and a plate discharging operation has become the mainstream. In this fully automatic type stencil printing apparatus, a manuscript is set on a manuscript reading device, the manuscript is read by a scanner unit (converting image information into an electrical signal using a CCD or the like), and a plate making machine including a thermal head, a platen roller, and the like The master is transported in contact with the heating element, and the master is punched by energizing the heating element in a pulsed manner according to the image information, and the punched master is automatically wound around the plate cylinder. Then, the printing paper is fed and continuously pressed by a pressing means such as a press roller to perform printing. In order to obtain a large amount of printed matter at high speed and at low cost, such a stencil printing apparatus is mainly used, and printing can be performed with a simple operation.
[0004]
One of the post-processing of printed paper discharged and stacked on a paper discharge tray after printing is finished (sometimes in the middle of printing) is a sorting operation for sorting a predetermined number of sheets according to the required number of copies. Conventionally, the operator sets the number of sorts in the counter, prints the set number of sheets, removes the printed sheets from the output tray, and sets the number of sorts again, or counts the stacked printed sheets The sorting method was adopted.
[0005]
However, the above-described method has a problem that the operator is constantly attached to the printing apparatus until the end of printing, the work efficiency is lowered, and it is troublesome to count printed sheets. Therefore, an input method called memory mode, class mode, etc., in which the printing device has a memory function and inputs the number of sheets to be sorted using the numeric keypad on the operation panel, etc., is also used. As a method, as disclosed in Japanese Utility Model Publication No. 53-105806, the last printed paper to be sorted or the first printed paper of the next sorting is shifted by a predetermined amount, or Japanese Utility Model Laid-Open No. 1-143760. As disclosed in the Gazette, the method of cutting and inserting the mark tape between the stacked printed sheets with a tape cutter device is adopted, so that the operator's work is reduced. It has become.
[0006]
[Problems to be solved by the invention]
However, according to the sorting method disclosed in Japanese Utility Model Publication No. 53-105806, when the next printed sheet comes into contact with the shifted printed sheet at the time of discharging, the printing is shifted for the mark. There is a problem that it becomes difficult to discriminate because the used paper is moved by being pushed by the next printed paper, or it is difficult to discriminate because it is shifted when the operator moves from the paper discharge tray.
[0007]
Further, according to the sorting method disclosed in Japanese Utility Model Laid-Open No. 1-143760, the tape used as a mark is not reused and is wasted, and the printed paper comes into contact with the printed paper to be discharged. When the tape placed on top is removed, or when the printed paper loaded on the paper output tray is moved from the paper output tray, the pinched tape is released, which is Similarly, there is a problem that discrimination is impossible.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a paper feeding device that can solve the above-mentioned problems and can mark a paper with an unchanging mark, and an image forming device that can efficiently perform sorting operations.
[0009]
[Means for Solving the Problems]
The invention described in claim 1An image forming apparatus comprising: a paper feeding device that feeds stacked paper one by one; and a guide plate that guides conveyance of the paper fed from the paper feeding device, wherein the guide plate is a leading edge of the paper An opening portion into which a corner portion enters, a guide member that is provided in the vicinity of the guide plate so as to be able to be immersed and separated from the opening portion, and that guides the leading end corner portion of the sheet to the opening portion when immersed.It is characterized by that.
[0010]
The invention according to claim 22. The image forming apparatus according to claim 1, further comprising a sorting mode in which printed sheets are divided into a plurality of groups for each predetermined number of sheets, and when the sorting mode is selected, the first or last sheet of the group is selected. When the image formation of one sheet is started, the guide member is immersed in the opening and the sheet feeding device is operated, and when the image formation is started on sheets other than the first sheet or the last sheet of the group, the guidance is performed. The member is moved away from the opening and the sheet feeding device is operated.It is characterized by that.
[0011]
The invention described in claim 32. The image forming apparatus according to claim 1, further comprising a sorting mode in which printed paper is divided into a plurality of groups for each predetermined number of sheets, and when the sorting mode is selected, an odd-numbered group among the groups. Alternatively, at the start of image formation of any one of the even-numbered groups, the guide member is moved to a position where the free end of the guide member is immersed in the opening, and the paper feeding device is operated. The guide member is moved to a position where the free end thereof is separated from the opening, and the paper feeding device is operated.It is characterized by that.
[0012]
A paper feeding device that can attach an invariant mark to a paper is a paper feeding device that stacks paper and feeds the paper one by one, with respect to the side edge of the top paper of the stacked paper A paper feeding device having coloring means provided so as to be able to contact and separate is conceivable.
[0013]
As an image forming apparatus capable of efficiently performing a sorting operation, an image forming apparatus including a sheet feeding device having a coloring unit that is provided so as to be able to come in contact with and separate from the side edge of the uppermost sheet of stacked sheets. The apparatus has a sorting mode in which printed paper is divided into a plurality of groups for each predetermined number of sheets, and when the sorting mode is selected, image formation of the first or last sheet of the group is performed At the start, the sheet is fed in a state where the coloring unit is in contact with the uppermost sheet, and at the start of image formation on sheets other than the first sheet or the last sheet of the group, the coloring unit is turned on. An image forming apparatus that feeds the sheet in a state of being separated from the uppermost sheet can be considered.
[0014]
Further, the image forming apparatus capable of efficiently performing the sorting operation includes a paper feeding device having a coloring unit provided so as to be able to come in contact with and separate from the side edge of the uppermost paper of the stacked paper. An image forming apparatus having a sorting mode for sorting printed sheets into a plurality of groups every predetermined number of sheets, and when the sorting mode is selected, the odd-numbered group or the even-numbered group of the groups The sheet is fed while the coloring unit is in contact with the uppermost sheet during image formation of one of the groups, and the coloring unit is separated from the uppermost sheet during formation of the other image. An image forming apparatus that feeds the paper in a state in which the paper is used can be considered.
[0015]
Further, as an image forming apparatus capable of performing sorting work efficiently, an image forming apparatus including a sheet feeding device that feeds stacked sheets one by one is rotated and driven in the state of being close to each other. A pair of folding rollers provided so as to be movable in a direction orthogonal to the direction, and a sorting mode in which printed paper is divided into a plurality of groups for each predetermined number of sheets, and when the sorting mode is selected, the group At the start of image formation of the first sheet or the last sheet, the pair of folding rollers is moved to a position corresponding to one side portion of the sheet and the sheet feeding device is operated, so that other than the first sheet of the group Alternatively, when starting image formation on a sheet other than the last sheet, the folding roller pair is moved to a position away from one side of the sheet and the sheet feeding device is operated. Forming device is considered.
[0016]
Further, as an image forming apparatus capable of performing sorting work efficiently, an image forming apparatus including a paper feeding device that feeds stacked paper one by one in a direction orthogonal to the feeding direction. A sheet moving means that moves, a pair of bending rollers that are driven to rotate in a state of being close to each other, and a sorting mode that divides the printed sheets into a plurality of groups for each predetermined number of sheets, when the sorting mode is selected In addition, at the start of image formation of the first sheet or the last sheet of the group, the stacked sheets are moved to a position where one side edge thereof corresponds to the bending roller pair and the sheet feeding device is operated. At the start of image formation on sheets other than the first sheet or the last sheet of the group, the stacked sheets are moved to a position where one side edge of the group is separated from the pair of bending rollers. The image forming apparatus is considered to operate the feeder with is.
[0017]
【Example】
The first of the present inventionReference exampleIn FIG. 1, a stencil printing apparatus 1 as an image forming apparatus mainly includes a paper feeding device 2, a plate making unit 3, a printing unit 4, and a paper discharge unit 5.
[0018]
The sheet feeding device 2 mainly includes a sheet feeding tray 6, a sheet feeding roller 7, a separation roller 8, a separation roller 9, a coloring means 10, a registration roller pair 11, and the like.
[0019]
The paper feed tray 6 is detachably attached to the stencil printing apparatus 1, and the printing paper P is stacked thereon. The stacked printing paper P is pressed against the paper feed roller 7 by a vertical movement mechanism (not shown). The paper feed roller 7 is rotationally driven by a driving means (not shown), and scoops up and feeds the printing paper P that is in contact with the outer peripheral surface thereof. The operation of the drive means for driving the paper feed roller 7 is controlled by the control means described later. The printing paper P scooped up by the paper feed roller 7 is contacted with a separation roller 8 that is driven by a driving force transmission means (not shown) and is driven to rotate in the same direction at the same peripheral speed as the paper feed roller 7. Double feeding is prevented by the separation roller 9 arranged.
[0020]
A coloring unit 10 is disposed on the right side of the paper feed roller 7. As shown in FIG. 2, the coloring means 10 is mainly composed of a rotation motor 14, an arm 15, an ink tank 16, an ink roller 17, and the like.
[0021]
The rotation motor 14 is fixed to the sheet feed table side plate 18, and one end of the arm 15 is fixed to the output shaft thereof. The rotation motor 14 is controlled by the control means 42 described later.
[0022]
An ink tank 16 and an ink roller 17 are disposed at the other end of the arm 15. An ink tank 16 that stores ink as a colorant therein supports an ink roller 17 rotatably. The ink tank 16 and the ink roller 17 are provided so as to face the inside of the paper feed plate side plate 18 from an arc-shaped opening 18 a formed in the paper feed plate side plate 18. The ink roller 17 is disposed at a position where the side edge portion A of the uppermost printing paper P stacked on the paper feed tray 6 corresponds to the outer peripheral surface thereof.
[0023]
On the left side of the separation roller 8, a well-known registration roller pair 11 made up of finely divided rollers, which is rotatably supported by a side plate (not shown) of the stencil printing apparatus 1 and is driven to rotate by a driving means (not shown), is disposed. . In the vicinity of the registration roller pair 11, guide plates 12 and 13 that form a feeding path for the printing paper P to the registration roller pair 11 are disposed. Each of the guide plates 12 and 13 is fixed to a side plate (not shown) of the stencil printing apparatus 1, and each guide plate 12 and 13 has a notch for allowing the peripheral surface of the registration roller pair 11 to face the feeding passage. Each is formed.
[0024]
A plate making unit 3 is disposed on the upper left side of the sheet feeding device 2. The plate making unit 3 is mainly composed of a thermal head 19, a platen roller 20, a conveying roller pair 21, a cutting means 22, a guide plate 23, and the like.
[0025]
The thermal head 19 and the platen roller 20 are urged by urging means (not shown) and are in contact with each other. While the master 25 is pulled out by the rotation of the platen roller 20 from the master roll 24, the master 25 is subjected to hot melt punching by heating of the heat generating elements of the thermal head 19, thereby creating a pre-made master.
[0026]
On the downstream side in the master conveyance direction from the arrangement positions of the thermal head 19 and the platen roller 20, a conveyance roller pair 21, a cutting unit 22, and a guide plate 23 are arranged. A transport roller pair 21 composed of a rotationally driven drive roller and a driven roller pressed against the drive roller sandwiches and transports the master 25. A cutting means 22 including a fixed blade and a movable blade provided movably with respect to the fixed blade cuts the master 25. A guide plate 23 fixed to a side plate (not shown) of the stencil printing apparatus 1 guides the master 25 during conveyance.
[0027]
A printing unit 4 is disposed between the paper feeding device 2 and the plate making unit 3. The printing unit 4 is mainly composed of a plate cylinder 26, a press roller 27, and the like.
[0028]
The plate cylinder 26 is rotatably supported on a side plate (not shown) of the stencil printing apparatus 1 and is driven to rotate by a plate cylinder driving unit (not shown). Inside the plate cylinder 26, known ink supply means 31 mainly including an ink supply pipe 28 that also serves as a support shaft of the plate cylinder 26, an ink roller 29, a doctor roller 30, and the like is disposed. On the outer peripheral surface of the plate cylinder 26, a stage portion 32 and a clamper 33 for holding the master 25 are disposed.
[0029]
Below the plate cylinder 26, a press roller 27 rotatably disposed on a support shaft 27a is disposed. The support shaft 27 a is swung by a swinging means (not shown), and the press roller 27 is configured such that the outer peripheral surface thereof can contact and separate from the outer peripheral surface of the plate cylinder 26.
[0030]
A paper discharge unit 5 is disposed on the lower left side of the printing unit 4. The paper discharge unit 5 mainly includes a peeling claw 34, a suction conveyance unit 35, a paper discharge tray 36, and the like.
[0031]
The peeling claw 34 whose base end is pivotally attached to the stencil printing apparatus 1 is rotated by a rotating means (not shown), and the claw portion formed at the free end is brought close to the plate cylinder 26. It is selectively positioned at a position separated from the plate cylinder 26.
[0032]
The suction conveyance unit 35 is attached to the stencil printing apparatus 1 and has a known structure in which the printed printing paper P is seated and then discharged outside the apparatus. The paper discharge tray 36 is detachably attached to the stencil printing apparatus 1 and sequentially stacks the printed printing paper P discharged from the apparatus by the suction conveyance unit 35.
[0033]
An operation panel 37 is disposed on the upper surface of the casing of the stencil printing apparatus 1. As shown in FIG. 3, the operation panel 37 includes a sorting key 38 for selecting a sorting mode for dividing printed paper into several groups, a numeric keypad 39 for setting printing conditions, and a start key for starting printing. 40, a plate making start key 41 and the like for starting the plate making operation are arranged.
[0034]
A control unit 42 is disposed below the operation panel 37 and inside the casing of the stencil printing apparatus 1. A control means 42, which is a well-known microcomputer mainly composed of a CPU, RAM, and ROM, controls the operation of the rotating motor 14 based on a command from the operation panel 37.
[0035]
Based on the above configuration, the operation will be described below.
Prior to printing, the operator sets a document in a document reading device (not shown) and presses the plate making start key 41 on the operation panel 37. When the plate making start key 41 is pressed, the used master is peeled off from the outer peripheral surface of the plate cylinder 26 by a plate removing device (not shown), and the plate cylinder 26 is rotated to the plate feeding standby position where the clamper 33 is located directly above. It stops and the clamper 33 is opened by opening / closing means (not shown).
[0036]
When the plate cylinder 26 enters the plate feed standby state, the platen roller 20 and the transport roller pair 21 are driven to rotate, the master 25 is pulled out from the master roll 24, and the thermal head 19 is actuated to punch the master 25 based on the original image. A plate-making image is formed. The master for which the plate making image is formed is sent to the plate cylinder 26 by the platen roller 20 and the conveying roller pair 21.
[0037]
If it is determined from the number of steps of a stepping motor (not shown) that rotationally drives the platen roller 20 that the front end of the pre-printed master has reached the clamper 33, the clamper 33 rotates and the front end of the pre-made master is moved with the stage unit 32. Hold it. Thereafter, the plate cylinder 26 starts to rotate in the clockwise direction.
[0038]
If it is determined from the number of steps of a stepping motor (not shown) that rotationally drives the platen roller 20 that the plate making for one plate has been completed, the rotation of the platen roller 20 and the conveying roller pair 21 is stopped and the cutting means 22 is stopped. Is activated and the master is completed. The cut master-made master is pulled out by the rotation of the plate cylinder 26 and wound on the outer peripheral surface of the plate cylinder 26.
[0039]
When the master is wound on the outer peripheral surface of the plate cylinder 26 and then the sorting key 38 is pressed by the operator, the control means 42 reads the operation program in the sorting mode. Next, the operator sets the number of sheets to be sorted and the number of groups using the numeric keypad 39, and then presses the start key 40. The number of sorting sheets and the number of groups specified here are input to the control means 42.
[0040]
When the start key 40 is pressed, the paper feed roller 7 and the separation roller 8 rotate to feed the printing paper P. At this time, the printing paper P is separated and fed one by one by the separation roller 8 and the separation roller 9, and when the leading edge reaches a position where it contacts the registration roller pair 11, the paper feeding roller 7 and the separation roller 8 Are stopped.
[0041]
In synchronization with the rotation of the plate cylinder 26, the registration roller pair 11 feeds the printing paper P between the plate cylinder 26 and the press roller 27. When a sensor (not shown) detects the leading edge of the fed printing paper P, a swinging means (not shown) is activated and the press roller 27 comes into contact with the plate cylinder 26 via the printing paper P.
[0042]
The printing paper P is pressed against the outer peripheral surface of the plate cylinder 26 by the press roller 27 to transfer the print image, and is peeled off from the outer peripheral surface of the plate cylinder 26 by the peeling claw 34. Thereafter, the printing paper P is transported to the suction transport unit 35, and is discharged onto the discharge tray 36 outside the apparatus while being seated by the suction transport unit 35. Thereafter, the printing operation is performed until the number of sorted sheets set by the same operation is consumed.
[0043]
When the control means 42 determines that the set number of sheets has been reached based on numerical information from a counter (not shown) that counts the number of printed sheets, a command is sent from the control means 42 and the rotary motor 14 is activated, and the arm 15 is moved. By rotating counterclockwise, the outer peripheral surface of the ink roller 17 comes into contact with the side edge portion A of the printing paper P. The printing paper P is pulled out by the rotation of the paper feed roller 7 and the separation roller 8 and is sent to a position where the front end of the printing paper P is brought into contact with the registration roller pair 11. Ink in the ink tank 16 is applied by an ink roller 17.
[0044]
When the printing paper P is fed by the registration roller pair 11, at the same time, the rotation motor 14 is actuated by a command from the control means 42, and the arm 15 is rotated in the clockwise direction, so that the outer peripheral surface of the ink roller 17. Is separated from the printing paper P.
[0045]
The printing paper P is pressed against the outer peripheral surface of the plate cylinder 26 by the press roller 27 to transfer the print image, and is peeled off from the outer peripheral surface of the plate cylinder 26 by the peeling claw 34. Thereafter, the printing paper P is transported to the suction transport unit 35, and is discharged onto the discharge tray 36 outside the apparatus while being seated by the suction transport unit 35.
[0046]
By the above-described operation, after one printing paper P coated with ink by the ink roller 17 is printed, the printing operation is performed again until the set number of sorted sheets is consumed, until the set number of printed sheets is consumed. This operation is repeated.
[0047]
With the configuration described above, the printed paper P that has been printed and stacked on the paper discharge tray 36 has the printed printing paper P with the ink applied to the side edges A as shown in FIG. By confirming the ink that is sandwiched between the inks and is an invariant mark, the sorting operation can be performed reliably and efficiently.
[0048]
First reference exampleThen, the control means 42 is configured to store an operation program for operating the rotation motor 14 when printing the last sheet of the group. However, the rotation motor is used when printing the first sheet of the group. It is good also as a structure which memorize | stored the operation program which act | operates 14.
[0049]
Further, an operation program for operating the rotation motor 14 at the time of image formation of either the odd-numbered group or the even-numbered group may be stored. In this case, the printed printing paper P is stacked on the paper discharge tray 36 in the state shown in FIG.
[0050]
FIG. 6 illustrates the present invention.ExampleFIG.This example is payThe first is only in that a paper feeding device 43 is used instead of the paper device 2.Reference exampleUnlike the above, other similar members are denoted by the same reference numerals, and detailed descriptions thereof are omitted.
[0051]
The sheet feeding device 43 mainly includes a sheet feeding tray 6, a sheet feeding roller 7, a separation roller 8, a separation roller 9, a registration roller pair 11, an upper guide plate 44, a lower guide plate 45, a guide member 46, and the like. .
[0052]
The upper guide plate 44 and the lower guide plate 45 are disposed at the same position as the guide plates 12 and 13 in the first embodiment, and a guide member 46 is disposed above the upper guide plate 44. .
[0053]
The guide member 46 is mainly composed of a support shaft 47 and a tongue piece 48. The support shaft 47 is rotatably supported on a side plate (not shown) of the paper feeding device 43 and is rotated by a driving means (not shown) that is driven and controlled by the control means 42. The base end of the tongue piece 48 is fixed to the support shaft 47.
[0054]
The upper guide plate 44 is provided with a notch (not shown) for allowing the tongue piece 48 to face the feed passage, and the lower guide plate 45 has the tongue piece 48 rotated as shown in FIG. An opening 49 is formed in which the free end can be immersed when it moves into the feed passage. The position where the free end of the tongue piece 48 is disposed and the position where the opening 49 is formed are downstream of the registration roller pair 11 in the paper conveyance direction, and the leading edge of the printing paper P fed by the registration roller pair 11 is The position is determined so that it can enter the opening 49.
[0055]
Based on the above configuration, the operation will be described below.
Prior to printing, the operator sets a document in a document reading device (not shown) and presses the plate making start key 41 on the operation panel 37. When the plate making start key 41 is pressed, the firstReference exampleThe plate making operation is performed in the same manner as described above, and the plate-making master is wound on the outer peripheral surface of the plate cylinder 26.
[0056]
Thereafter, the operator presses the sorting key 38 and the numeric keypad 39 to set the sorting mode, the number of sorting sheets, and the number of groups, and then presses the start key 40. The number of sorting sheets and the number of groups specified here are input to the control means 42.
[0057]
When the start key 40 is pressed, the paper feed roller 7 and the separation roller 8 rotate to separate and feed the printing paper P one by one, and when the leading edge of the printing paper P reaches a position where it contacts the registration roller pair 11. The rotation of the paper feed roller 7 and the separation roller 8 is stopped.
[0058]
In synchronization with the rotation of the plate cylinder 26, the registration roller pair 11 feeds the printing paper P between the plate cylinder 26 and the press roller 27. When a sensor (not shown) detects the leading edge of the fed printing paper P, a swinging means (not shown) is activated and the press roller 27 comes into contact with the plate cylinder 26 via the printing paper P.
[0059]
The printing paper P is pressed against the outer peripheral surface of the plate cylinder 26 by the press roller 27 to transfer the print image, and is peeled off from the outer peripheral surface of the plate cylinder 26 by the peeling claw 34. Thereafter, the printing paper P is transported to the suction transport unit 35, and is discharged onto the discharge tray 36 outside the apparatus while being seated by the suction transport unit 35. Thereafter, the printing operation is performed until the number of sorted sheets set by the same operation is consumed.
[0060]
When the control means 42 determines that the set number of sheets has been reached based on numerical information from a counter (not shown) that counts the number of printed sheets, a command is sent from the control means 42 and a drive means (not shown) is activated to provide support. The shaft 47 rotates counterclockwise in FIG. 6 and the free end of the tongue piece 48 is immersed in the opening 49.
[0061]
When the printing paper P is fed by the registration roller pair 11 in the above-described state, one corner of the leading edge of the printing paper P is guided by the tongue piece 48 and enters the opening 49. Thereafter, when the printing paper P is fed by the rotation of the registration roller pair 11, the corner portion that has entered the opening 49 is bent downward.
[0062]
The printing paper P is pressed against the outer peripheral surface of the plate cylinder 26 by the press roller 27 to transfer the print image, and is peeled off from the outer peripheral surface of the plate cylinder 26 by the peeling claw 34. At this time, the bent corner is pressed against the outer peripheral surface of the plate cylinder 26 by the press roller 27, whereby the folding condition is further strengthened. Thereafter, the printing paper P is transported to the suction transport unit 35, and is discharged onto the discharge tray 36 outside the apparatus while being seated by the suction transport unit 35.
[0063]
After one corner of the printing sheet P is printed by the above-described operation, the printing operation is performed again until the set number of sorted sheets is consumed, and this operation is performed until the set number of printed sheets is consumed. Is repeated.
[0064]
With the configuration described above, the printed paper P that has been printed and stacked on the paper discharge tray 36 is, as shown in FIG. By confirming the tip corner, the sorting operation can be performed reliably and efficiently.
[0065]
In the above embodiment, the control means 42 is configured to store an operation program for operating a driving means (not shown) that rotates the support shaft 47 when printing the last one of the group. An operation program for operating a driving unit (not shown) when printing one sheet may be stored.
[0066]
In addition, an operation program for operating a driving unit (not shown) at the time of image formation of either the odd-numbered group or the even-numbered group may be stored.
[0067]
FIG. 9 illustrates the present invention.Adopted the second reference exampleA stencil printing apparatus 50 as an image forming apparatus is shown. The stencil printing apparatus 50 includes the firstReference exampleCompared with the stencil printing apparatus 1 shown in FIG. 2, a point using a paper feeding device 51 instead of the paper feeding device 2 and a point using a paper discharge unit 52 instead of the paper discharge unit 5.WhenIs different.
[0068]
The sheet feeding device 51 mainly includes a sheet feeding tray 6, a sheet feeding roller 7, a separation roller 8, a separation roller 9, a registration roller pair 11, guide plates 12, 13 and the like.
[0069]
The paper discharge unit 52 mainly includes a peeling claw 34, a suction conveyance unit 35, a paper discharge tray 36, a folding roller pair unit 53, and the like. The folding roller pair unit 53 mainly includes a moving holder 54, a folding roller pair 55 including an upper folding roller 55a and a lower folding roller 55b.
[0070]
The moving holder 54 is movably disposed on a rail (not shown) fixed to the stencil printing apparatus main body. Support shafts 55c and 55d are rotatably supported by the moving holder 54 via bearings (not shown).
[0071]
An upper folding roller 55a having a V-groove 55e on the peripheral surface is fixed to one end of the support shaft 55c, and a lower folding roller 55b having a protrusion 55f on the peripheral surface is fixed to one end of the support shaft 55d. 55a and 55b are respectively supported in a state where their peripheral surfaces are in contact with each other. Driving means (not shown) are connected to the other ends of the respective support shafts 55c and 55d, and the respective support shafts 55c and 55d are driven to rotate in opposite directions at the same peripheral speed as the paper transport speed of the suction transport unit 35. Is done. The driving means (not shown) that rotationally drives each of the support shafts 55c and 55d is controlled by the control means 42, respectively.
[0072]
The V-groove 55e and the protrusion 55f are shaped so as to fit smoothly with each other through the printing paper P. The folding rollers 55a and 55b and the support shafts 55c and 55d are sucked and conveyed. Each position is determined so that the contact position between the upper folding roller 55a and the lower folding roller 55b is positioned on the conveyance path of the printing paper P conveyed by the unit 35.
[0073]
The moving holder 54 is moved by a holder moving means (not shown) in a direction perpendicular to the paper surface in FIG. 9, which is a direction orthogonal to the paper conveyance direction, and is conveyed by the suction conveyance unit 35 shown by a solid line in FIG. A state in which the contact portion between the upper folding roller 55a and the lower folding roller 55b is separated from one side portion of P, and one side portion of the printing paper P indicated by a two-dot chain line in FIG. Each is positioned in a state where the contact portion with the roller 55b is sandwiched. The operation of the holder moving means (not shown) is controlled by the control means 42.
[0074]
Based on the above configuration, the operation will be described below.
Prior to printing, the operator sets a document in a document reading device (not shown) and presses the plate making start key 41 on the operation panel 37. When the plate making start key 41 is pressed, the firstReference exampleThe plate making operation is performed in the same manner as described above, and the plate-making master is wound on the outer peripheral surface of the plate cylinder 26.
[0075]
Thereafter, the operator presses the sorting key 38 and the numeric keypad 39 to set the sorting mode, the number of sorting sheets, and the number of groups, and then presses the start key 40. The number of sorting sheets and the number of groups specified here are input to the control means 42.
[0076]
When the start key 40 is pressed, the paper feed roller 7 and the separation roller 8 rotate to separate and feed the printing paper P one by one, and when the leading edge of the printing paper P reaches a position where it contacts the registration roller pair 11. The rotation of the paper feed roller 7 and the separation roller 8 is stopped.
[0077]
In synchronization with the rotation of the plate cylinder 26, the registration roller pair 11 feeds the printing paper P between the plate cylinder 26 and the press roller 27. When a sensor (not shown) detects the leading edge of the fed printing paper P, a swinging means (not shown) is activated and the press roller 27 comes into contact with the plate cylinder 26 via the printing paper P.
[0078]
The printing paper P is pressed against the outer peripheral surface of the plate cylinder 26 by the press roller 27 to transfer the print image, and is peeled off from the outer peripheral surface of the plate cylinder 26 by the peeling claw 34. Thereafter, the printing paper P is transported to the suction transport unit 35, and is discharged onto the discharge tray 36 outside the apparatus while being seated by the suction transport unit 35. Thereafter, the printing operation is performed until the number of sorted sheets set by the same operation is consumed.
[0079]
When the control means 42 determines that the set number of sorted sheets has been reached based on numerical information from a counter (not shown) that counts the number of printed sheets, a command is sent from the control means 42 and a holder moving means (not shown) is activated. The moving holder 54 moves to the position indicated by the two-dot chain line in FIG. 10, and the driving means (not shown) that rotates the support shafts 55c and 55d operates to rotate the pair of folding rollers 55.
[0080]
The printing paper P fed by the rotation of the registration roller pair 11 is pressed against the outer peripheral surface of the plate cylinder 26 by the press roller 27 to transfer the print image, and then the outer peripheral surface of the plate cylinder 26 by the peeling claw 34. More peeled. Thereafter, the printing paper P is transported to the suction transport unit 35, passes through the contact portion between the upper folding roller 55a and the lower folding roller 55b, and then folds one side thereof into a chevron, and then sucks The paper is discharged on a discharge tray 36 outside the apparatus while being seated by the transport unit 35.
[0081]
By the above-described operation, after one printing sheet P folded on one side is printed, the printing operation is performed again until the set number of sorted sheets is consumed, and this printing operation is performed until the set number of printed sheets is consumed. The operation is repeated.
[0082]
With the above-described configuration, as shown in FIG. 11, printed printing paper P with one side C folded is inserted into the printing paper P printed and stacked on the paper discharge tray 36 for each number of sorted sheets. Therefore, the sorting operation can be performed reliably and efficiently.
[0083]
the aboveReference exampleThen, when the last sheet of the group is printed, the control means 42 is configured to store an operation program for operating a holder moving means (not shown) and a driving means (not shown) that rotationally drives the support shafts 55c and 55d. However, it may be configured to store an operation program for operating each of the above-described means when printing the first sheet of the group.
[0084]
FIG. 12 illustrates the present invention.Adopted the third reference exampleA stencil printing apparatus 56 as an image forming apparatus is shown. This stencil printing device 56 includes:Second reference exampleCompared with the stencil printing apparatus 50 shown in FIG. 5, a point that a paper feeding device 57 is used instead of the paper feeding device 51, and a point that a paper discharge unit 58 is used instead of the paper discharge unit 52.WhenIs different.
[0085]
The sheet feeding device 57 mainly includes a sheet feeding tray 60, a sheet feeding roller 7, a separation roller 8, a separation roller 9, a registration roller pair 11, guide plates 12, 13, a sheet feeding tray moving unit 59 as a sheet moving unit, and the like. It is configured.
[0086]
The paper feed tray moving means 59 is mainly composed of a feed screw 61 and a motor 62 that rotationally drives the feed screw 61. The paper feed tray 60 is formed with a female screw into which the feed screw 61 is screwed. . With this configuration, when the motor 62 operates and the feed screw 61 rotates, the paper feed tray 60 is moved in a direction perpendicular to the paper surface in FIG. The operation of the motor 62 is controlled by the control means 42.
[0087]
The paper discharge unit 58 mainly includes a peeling claw 34, a suction conveyance unit 35, a paper discharge tray 36, a bending roller pair unit 63, and the like. The bending roller pair unit 63 mainly includes a moving holder 64, a bending roller pair 65 including an upper bending roller 65a and a lower bending roller 65b.
[0088]
The moving holder 64 is movably disposed on a rail (not shown) fixed to the stencil printing apparatus main body. Support shafts 65c and 65d are rotatably supported by the moving holder 64 via bearings (not shown).
[0089]
An umbrella-shaped upper bending roller 65a is fixed to one end of the support shaft 65c, and a lower bending roller 65b having a cylindrical portion 65e and an umbrella-shaped portion 65f is fixed to one end of the support shaft 65d. , 65b are supported in a state where the peripheral edge of the upper bending roller 65a and the boundary between the cylindrical portion 65e and the umbrella-shaped portion 65f of the lower bending roller 65b are made to correspond to each other. Drive means (not shown) are connected to the other ends of the respective support shafts 65c and 65d, and the respective support shafts 65c and 65d are driven to rotate in opposite directions at the same peripheral speed as the paper transport speed of the suction transport unit 35. Is done. The driving means (not shown) that rotationally drives each of the support shafts 65c and 65d is controlled by the control means 42, respectively.
[0090]
The moving holder 64 is moved by a holder moving means (not shown) in a direction perpendicular to the paper surface in FIG. 12, which is a direction perpendicular to the paper transport direction, and the bending roller pair 65 has a peripheral edge of the upper bending roller 65a at the paper side edge. A position (a position indicated by a two-dot chain line in FIG. 13) that substantially corresponds to a side plate position (not shown) of the sheet discharge tray 36 to be controlled, and a position that is separated from one side edge of the printing paper P conveyed by the suction conveyance unit 35 (see FIG. 13 at positions indicated by solid lines). The operation of the holder moving means (not shown) is controlled by the control means 42.
[0091]
Based on the above configuration, the operation will be described below.
Prior to printing, the operator sets a document in a document reading device (not shown) and presses the plate making start key 41 on the operation panel 37. When the plate making start key 41 is pressed, the firstReference exampleThe plate making operation is performed in the same manner as described above, and the plate-making master is wound on the outer peripheral surface of the plate cylinder 26.
[0092]
Thereafter, the operator presses the sorting key 38 and the numeric keypad 39 to set the sorting mode, the number of sorting sheets, and the number of groups, and then presses the start key 40. The number of sorting sheets and the number of groups specified here are input to the control means 42.
[0093]
When the start key 40 is pressed, the paper feed roller 7 and the separation roller 8 rotate to separate and feed the printing paper P one by one, and when the leading edge of the printing paper P reaches a position where it contacts the registration roller pair 11. The rotation of the paper feed roller 7 and the separation roller 8 is stopped.
[0094]
In synchronization with the rotation of the plate cylinder 26, the registration roller pair 11 feeds the printing paper P between the plate cylinder 26 and the press roller 27. When a sensor (not shown) detects the leading edge of the fed printing paper P, a swinging means (not shown) is activated and the press roller 27 comes into contact with the plate cylinder 26 via the printing paper P.
[0095]
The printing paper P is pressed against the outer peripheral surface of the plate cylinder 26 by the press roller 27 to transfer the print image, and is peeled off from the outer peripheral surface of the plate cylinder 26 by the peeling claw 34. Thereafter, the printing paper P is transported to the suction transport unit 35, and is discharged onto the discharge tray 36 outside the apparatus while being seated by the suction transport unit 35. Thereafter, the printing operation is performed until the number of sorted sheets set by the same operation is consumed.
[0096]
When the control means 42 determines that the set number of sorted sheets has been reached based on numerical information from a counter (not shown) that counts the number of printed sheets, a command is sent from the control means 42 and a holder moving means (not shown) is activated. The moving holder 64 is moved to the position indicated by the two-dot chain line in FIG. 13, the driving means (not shown) that rotates the support shafts 65c and 65d is operated, the bending roller pair 65 is rotated, and the motor 62 is further operated. Then, the feed screw 61 rotates and the paper feed tray 60 is moved to the back side of the paper surface in FIG.
[0097]
Then, the printing paper P fed from the paper feed tray 60 through the registration roller pair 11 is pressed against the outer peripheral surface of the plate cylinder 26 by the press roller 27 to transfer the print image, and then the plate cylinder by the peeling claw 34. 26 is peeled off from the outer peripheral surface. Thereafter, the printing paper P is conveyed to the suction conveyance unit 35 and passes between the upper bending roller 65a and the lower bending roller 65b so that one side edge thereof is folded upward. The sheet is discharged onto the sheet discharge tray 36 outside the apparatus while being seated.
[0098]
By the above-described operation, after one printing sheet P having one side edge bent is printed, the printing operation is performed again until the set number of sorted sheets is consumed, and this printing operation is performed until the set number of printed sheets is consumed. The operation is repeated.
[0099]
With the above-described configuration, as shown in FIG. 14, printed printing paper P with one side edge D folded is sandwiched for each sorted number of printed paper P that has been printed and stacked on the paper discharge tray 36. Therefore, the sorting operation can be performed reliably and efficiently.
[0100]
the aboveReference exampleThen, when printing the last sheet of the group, the control means 42 stores a holder moving means (not shown), a driving means (not shown) for rotating the respective support shafts 65c and 65d, and an operation program for operating the motor 62. However, a configuration may be adopted in which an operation program for operating each of the above-described units when the first sheet of the group is printed is stored.
[0101]
the aboveExamples and reference examplesAlthough the stencil printing apparatus has been described as an example of the image forming apparatus, the present invention is not limited to this, and can be applied to other image forming apparatuses such as a copying apparatus and a facsimile.
[0102]
【The invention's effect】
According to invention of Claim 1,The paper guided by the guide member is conveyed after the front end corner portion is put into the opening portion, and the front end corner portion is folded, and a fold as a mark is attached to the paper.be able to.
[0103]
According to invention of Claim 2,In the sorting mode, the guiding means guides the leading edge of the first sheet or the last sheet of the group to the opening, so that a fold as a mark is attached to the sheet, and by confirming this,Sorting work can be performed reliably and efficiently.
[0104]
According to invention of Claim 3,In the sorting mode, the guide means guides the leading end corner of either odd-numbered group or even-numbered group paper to the opening, so that a crease as a mark is attached to the paper and confirmed. BySorting work can be performed reliably and efficiently.
[0105]
A paper feeding device that stacks paper and feeds the paper one by one, the paper feeding device having coloring means provided so as to be able to come in contact with and separate from the side edge of the uppermost paper of the stacked paper. By using it, the coloring means colors the side edges of the printing paper, so that it is possible to apply a colorant that is an invariant mark to the paper.
[0106]
An image forming apparatus including a sheet feeding device having a coloring unit provided so as to be able to come in contact with and separate from the side edge of the uppermost sheet of stacked sheets, wherein a plurality of printed sheets are provided every predetermined number When the sorting mode is selected, the coloring unit is brought into contact with the uppermost sheet at the start of image formation of the first sheet or the last sheet of the group. The sheet is fed in a state where the coloring means is separated from the topmost sheet at the start of image formation on sheets other than the first sheet or the last sheet of the group. By using the image forming apparatus to be fed, the coloring means performs coloring on the side edge of the first sheet or the last sheet of the group in the sorting mode. Check It can be carried out reliably and efficiently sorting work by.
[0107]
An image forming apparatus including a paper feeding device having a coloring unit provided so as to be able to come in contact with and separate from a side edge portion of the topmost paper of the stacked paper, and prints printed paper every predetermined number of sheets. A sorting mode for sorting into a plurality of groups, and when the sorting mode is selected, the coloring unit is set to the top when forming an image of either the odd-numbered group or the even-numbered group of the groups. An image forming apparatus is used that feeds the sheet in contact with the upper sheet, and feeds the sheet in a state where the coloring unit is separated from the uppermost sheet in forming the other image. Thus, in the sorting mode, the coloring means colors the side edge of either the odd-numbered group or the even-numbered group, so that the colorant that is an invariant mark is attached to the sheet. By confirming this can be performed with certainty and efficiently sorting work.
[0108]
In an image forming apparatus including a sheet feeding device that feeds stacked sheets one by one, a pair of folding rollers that are rotationally driven in a state of being close to each other and are movable in a direction orthogonal to the sheet feeding direction. A sorting mode in which printed sheets are divided into a plurality of groups for each predetermined number of sheets, and when the sorting mode is selected, the first one or the last one of the group starts image formation. The folding roller pair is moved to a position corresponding to one side portion of the sheet and the sheet feeding device is operated, and the folding roller is set when image formation is started on sheets other than the first sheet or the last sheet of the group. By using an image forming apparatus that moves the pair to a position off one side of the sheet and activates the sheet feeding device,Comes in sort modeTAs one side of the first or last sheet of the loop passes through the pair of folding rollersEyesA crease, which is a mark, is attached to one side of the paper.FinishingSeparation work can be performed reliably and efficiently.
[0109]
In an image forming apparatus including a sheet feeding device that feeds stacked sheets one by one, a sheet moving unit that moves the stacked sheets in a direction orthogonal to the feeding direction is driven to rotate in a state close to each other. A pair of bending rollers and a sorting mode in which printed paper is divided into a plurality of groups for each predetermined number of sheets, and when the sorting mode is selected, the first one image or the last one image of the group At the start of formation, the stacked sheets are moved to a position where one side edge thereof corresponds to the bending roller pair, and the sheet feeding device is operated, so that the sheets other than the first sheet or the last sheet other than the first sheet in the group. At the start of image formation, an image forming apparatus that moves the stacked sheets to a position where one side edge of the stacked sheets deviates from the pair of bending rollers and operates the sheet feeding device is used. Ri,Comes in sort modeTAs one side of the first or last sheet of the loop passes through a pair of bending rollersEyesA crease, which is a mark, is attached to one side of the paper.FinishingSeparation work can be performed reliably and efficiently.
[Brief description of the drawings]
FIG. 1 shows the first of the present invention.Reference exampleOf image forming apparatus adoptingfrontFIG.
FIG. 2 shows the first of the present inventionReference exampleExplain the coloring means aroundPlaneFIG.
FIG. 3 of the present inventionExample and first to third reference examplesIt is a figure which shows the operation panel used for.
FIG. 4 shows the first of the present inventionReference exampleIt is a figure explaining the control means used for.
FIG. 5 shows the first of the present invention.Reference exampleFIG. 6 is a diagram showing a sorted state of printed sheets by the method.
FIG. 6 shows the present invention.ExampleOf the main parts of the paper feeding device used for printingfrontFIG.
FIG. 7 shows the present invention.ExampleExplaining the vicinity of the guide memberPlaneFIG.
FIG. 8 shows the present invention.ExampleFIG. 6 is a diagram showing a sorted state of printed sheets by the method.
FIG. 9 shows the present invention.Second reference exampleOf the main parts of an image forming apparatus that employsfrontFIG.
FIG. 10 shows the present invention.Second reference exampleExplain the folding roller pair unit partsideFIG.
FIG. 11 shows the present invention.Second reference exampleFIG. 6 is a diagram showing a sorted state of printed sheets by the method.
FIG. 12 shows the present invention.Third reference exampleOf the main parts of an image forming apparatus that employsfrontFIG.
FIG. 13 is a diagram of the present invention.Third reference exampleExplain the bending roller vs. unit's partsideFIG.
FIG. 14 shows the present invention.Third reference exampleFIG. 6 is a diagram showing a sorted state of printed sheets by the method.
FIG. 15 shows the present invention.First reference exampleIt is a figure which shows the sorting state of the printed paper by the modification of this.
[Explanation of symbols]
1,50,56 Image forming device (stencil printing device)
2, 43, 51, 57 Paper feeder
10 Coloring means
45 Guide plate (lower guide plate)
46 Guide member
49 opening
55 Folding roller pair
65 Bending roller pair
A side edge
B Tip corner
C One side
D One side edge
P Printing paper

Claims (3)

An image forming apparatus comprising: a sheet feeding device that feeds stacked sheets one by one; and a guide plate that guides conveyance of the sheet fed from the sheet feeding device;
The guide plate has an opening into which the leading edge of the paper enters, and is provided in the vicinity of the guide plate so as to be able to be immersed and separated from the opening. An image forming apparatus having a guide member for guiding to a section . The image forming apparatus according to claim 1.
The guide member has a sorting mode in which printed sheets are divided into a plurality of groups for each predetermined number of sheets, and when the sorting mode is selected, at the start of image formation of the first sheet or the last sheet of the group Is inserted into the opening and the sheet feeding device is operated, and at the start of image formation on sheets other than the first sheet or the last sheet of the group, the guide member is separated from the opening and the feeding is performed. An image forming apparatus characterized by operating a paper device . The image forming apparatus according to claim 1.
An image of either one of an odd-numbered group or an even-numbered group among the groups has a sorting mode in which printed paper is divided into a plurality of groups for each predetermined number of sheets, and the sorting mode is selected. At the start of formation, the guide member is moved to a position where its free end is immersed in the opening and the paper feeding device is operated. At the start of the other image formation, the free end of the guide member is moved from the opening. An image forming apparatus, wherein the image forming apparatus is moved to a separated position and the sheet feeding device is operated .

Images