JP3672791B2 - Post-processing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a post-processing apparatus for performing post-processing such as stapling on paper discharged from an image forming apparatus and discharging the paper.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a post-processing apparatus that performs stapling on a sheet discharged from an image forming apparatus, a plurality of sheets before the stapling process is performed, as disclosed in JP-A-2-144370. Are placed side by side, and a staple stacking tray that discharges a bundle of sheets that have undergone stapling after being aligned on the staple tray. There has been a problem that the width of the processing apparatus becomes large. Further, it is necessary to provide a means for conveying the sheet bundle stapled by the staple tray to the sheet stacking tray, resulting in an increase in the size of the apparatus.
[0003]
Japanese Laid-Open Patent Publication No. 59-78069 discloses a configuration in which a sheet stacking tray for discharging a bundle of sheets that have undergone stapling is disposed below the staple tray, thereby increasing the width of the post-processing apparatus. Can be reduced. However, the above configuration requires a separate means for transporting paper from the staple tray to the paper stacking tray, and the configuration of the apparatus is complicated, leading to cost increases in the future.
[0004]
In Japanese Patent Laid-Open Nos. 1-215576 and 2-28470, there is provided conveying means for dropping a sheet bundle stapled on the staple tray onto the stacking tray and conveying the sheet bundle from the staple tray to the sheet stacking tray. An omitted configuration is disclosed.
[0005]
However, in the above configuration, when the sheet bundle is dropped, it is dropped from the end of the sheet bundle, so that the stackability of the sheet bundle on the stacking tray is poor (the sheet bundle is not aligned), and the dropped sheet bundle is arranged and stacked. Another means was needed.
[0006]
Further, Japanese Patent Laid-Open No. 8-277059 discloses a post-processing device that rotates the bottom plate of the staple tray into a door-like shape to drop stapled paper onto the stacking tray.
[0007]
In this configuration, the sheet bundle on the staple tray is dropped on the stacking tray while maintaining a substantially horizontal state. Therefore, the stack of sheets is loaded as compared with the configurations of JP-A-1-214576 and JP-A-2-28470. The placement is getting better.
[0008]
[Problems to be solved by the invention]
However, in the post-processing apparatus described in JP-A-8-277059, the bottom plate of the staple tray is rotated to drop the sheet bundle, so that the tip of the bottom plate rotates and moves downward. Accordingly, it is necessary to widen the interval between the stacking tray and the staple tray, and there is a problem that the height of the apparatus is increased, the size is increased in the future, and the dropping distance of the stapled sheet bundle is increased. There is a problem that the stackability of the sheet bundle tends to become unstable.
[0009]
The present invention has been made in order to solve the above-described problems, and has an object of providing a good stacking property on a stacking tray (discharge tray) of a sheet bundle after post-processing such as stapling. And it is providing the post-processing apparatus which can achieve size reduction (width direction and height direction) of an apparatus.
[0010]
[Means for Solving the Problems]
In order to solve the above-described problems, the post-processing apparatus of the present invention performs post-processing on a post-processing tray on a plurality of sheets with respect to the sheets discharged from the image forming apparatus, and the post-processed sheet bundle In the post-processing device that discharges the paper onto the paper discharge tray, the paper discharge tray is disposed below the post-processing tray, and the post-processing tray is divided from the center to the bottom of the post-processing tray. Each bottom plate is placed on the post-processing tray with a carry-out path for dropping the sheet bundle placed on the post-processing tray onto the paper discharge tray. It is characterized by being provided so as to slide along the paper surface.
[0011]
According to the above configuration, since the paper discharge tray is positioned below the post-processing tray, the width, that is, the size of the post-processing device can be reduced, and the post-processed sheet bundle can be placed below the post-processing tray. For discharging the paper stack, the bottom plate of the post-processing tray slides along the paper surface placed on the post-processing tray to drop the paper bundle onto the paper output tray. Since the path is formed and the sheet bundle is dropped from the carry-out path, no conveying means from the post-processing tray to the paper discharge tray is required.
[0012]
In the above configuration, the paper discharge tray is positioned below the post-processing tray, and each bottom plate of the post-processing tray slides from the central portion to stack the sheet bundle on the post-processing tray at the central portion. Therefore, the sheet bundle can be dropped while maintaining a horizontal posture, and the loaded state of the sheet bundle on the sheet discharge tray can be improved.
[0013]
In addition, in the above configuration, each bottom plate of the post-processing tray slides along the sheet surface of the sheet bundle from the center portion to form a carry-out path. Since the interval between the paper tray and the paper discharge tray can be narrowed and the drop of the paper bundle can be reduced, the paper bundle can be placed in a better state on the paper discharge tray.
[0014]
Further, in the above configuration, it is not necessary to secure a space for the bottom plate to rotate downward as in the conventional case, and it is possible to set the upper limit capacity of the stack of sheets on the discharge tray. Become.
[0015]
In the above configuration, the amount of movement of each bottom plate of the post-processing tray can be reduced and the discharge path can be formed more quickly than when the bottom plate of the post-processing tray that is not divided at the center is moved to one side. Since the time for carrying out the post-processed sheet bundle can be shortened, the speed of the post-processing apparatus can be increased and the amount of movement of each bottom plate can be suppressed as compared with the above case. Miniaturization can be achieved.
[0016]
In order to solve the above-described problem, another post-processing apparatus according to the present invention performs post-processing on a plurality of sheets on a post-processing tray for the sheets discharged from the image forming apparatus, and the post-processing is performed. In a post-processing apparatus that discharges a bundle of sheets onto a paper discharge tray, the paper discharge tray is disposed below the post-processing tray, and is provided with lifting means for moving the paper discharge tray in the vertical direction to control the lifting means. The control means is provided so as to control a drop for dropping the sheet bundle from the post-processing tray onto the paper discharge tray.
[0017]
According to the above configuration, by providing the raising / lowering means and the control means, the drop of the sheet bundle from the post-processing tray to the paper discharge tray can be set to be constant within a predetermined range, for example. It is possible to further stabilize the loading of the sheet bundle.
[0018]
In the post-processing apparatus, it is preferable that the drop for dropping the sheet bundle from the post-processing tray onto the paper discharge tray is set to be at least equal to or greater than the thickness of the post-processing tray.
[0019]
According to the above configuration, the interval between the post-processing tray and the discharge tray is set to be equal to or greater than the thickness of the post-processable number of sheets. Since it can be dropped and placed, the placement of the sheet bundle on the paper discharge tray can be stabilized.
[0020]
In the said post-processing apparatus, it is preferable that each baseplate is set so that it may mutually space apart. According to the above configuration, when each of the bottom plates of the post-processing tray is slid and opened to drop the sheet bundle onto the paper discharge tray, the movement stroke of each bottom plate can be shortened, and the time for carrying out the paper bundle to the paper discharge tray is reduced. And the apparatus width required for sliding each bottom plate can be reduced.
[0021]
In the above-described post-processing apparatus, it is desirable that the opening distance between the bottom plates of the post-processing tray is 10 to 46% of the width of the paper to be placed. According to the above configuration, when the bottom plates of the post-processing tray are slid and opened to drop the sheet bundle onto the paper discharge tray, the bottom plate moving strokes can be shortened. The apparatus width required for sliding each bottom plate can be reduced. In addition, in the above configuration, by setting the opening interval to 10 to 46% of the paper width, it is possible to stably place the paper and the paper bundle on the post-processing tray without bending.
[0022]
In the post-processing apparatus, the aligning unit that aligns the paper placed on the post-processing tray by contact in the width direction can be slid in the post-processing tray in a direction perpendicular to the paper transport direction. When the alignment unit driving means for driving the alignment unit slides each bottom plate to drop the sheet bundle on the post-processing tray, the contact position of the alignment unit with the sheet bundle is the position of the sheet bundle. It is preferable that the width is controlled so as to be substantially the same as the end portion.
[0023]
According to the above configuration, when the sheet bundle on the post-processing tray is dropped by sliding each bottom plate, the alignment unit is in contact with the end of the sheet bundle and serves as a drop guide for the sheet bundle. It is possible to improve the placement state on the discharge tray.
[0024]
In the post-processing apparatus, it is further preferable that a paper drop guide extending along the paper drop direction is provided at the opening of each bottom plate. According to the above configuration, since the paper dropping guide extending along the paper dropping direction is provided at the opening of each bottom plate that supports the paper bundle in the post-processing tray, the paper bundle is placed on the discharge tray from between the bottom plates. When the sheet bundle is dropped onto the sheet discharge tray, the sheet bundle is aligned and dropped by the sheet drop guide, so that the stacking state of the sheet bundle on the sheet discharge tray can be further improved.
[0025]
In order to solve the above-described problem, the post-processing apparatus according to the present invention performs post-processing on a plurality of sheets on the post-processing tray for the sheets discharged from the image forming apparatus. In the post-processing apparatus that drops the discharged paper bundle onto a paper discharge tray disposed below the post-processing tray and discharges it, the paper discharged from the image forming apparatus is conveyed to the post-processing tray or the paper discharge tray. The conveying means is provided with a first conveying member and a second conveying member, and the first and second conveying members are each provided with rollers at both ends of the paper guide, and both rollers can be rotated by a driving member. Is connected to the roller shaft, and is provided so as to be rotatable together with the sheet guide with the upstream roller shaft as a fulcrum. The roller serving as the rotation fulcrum of the first conveyance member and the rotation fulcrum of the second conveyance member The paper is transported between the rollers When the first and second transport members are both in the first position, the sheet can be discharged onto the post-processing tray, and both the first and second transport members are in the first position. When the second position is turned downward from the position, the sheet can be discharged onto the discharge tray.
[0026]
According to the above configuration, the sheet is dropped from the post-processing tray to the discharge tray below the post-processing tray, and the sheet can be transported to the post-processing tray or the discharge tray by using a common transport unit. Can be reduced. Since the tray to be transported can be changed by switching the position of the transport means, it is possible to omit the provision of the gate means for switching the paper transport direction. Since the transport means itself has a function of a transport direction switching gate, transport to each tray can be ensured.
[0027]
In order to solve the above-described problem, the post-processing apparatus according to the present invention performs post-processing on a plurality of sheets on the post-processing tray for the sheets discharged from the image forming apparatus. In the post-processing apparatus that drops the discharged paper bundle onto a paper discharge tray disposed below the post-processing tray and discharges it, the paper discharged from the image forming apparatus is conveyed to the post-processing tray or the paper discharge tray. The conveying means is provided with a first conveying member and a second conveying member, and the first and second conveying members are respectively stretched between two rollers and two rollers along the sheet conveying direction. An endless belt that conveys the laid paper, and is rotatably provided with the upstream roller shaft as a fulcrum. The roller and the second conveyance member on the side serving as the rotation fulcrum of the first conveyance member The roller on the side that is the rotation fulcrum of the Thus, when a nip for conveying the sheet is formed and the first and second conveying members are both in the first position, the sheet can be discharged onto the post-processing tray, and the first and second When both the two transport members are in the second position rotated downward from the first position, the sheet can be discharged onto the discharge tray.
[0028]
According to the above configuration, the sheet can be dropped from the post-processing tray to the discharge tray below the post-processing tray, and can be transported to the post-processing tray or the discharge tray by using a common transport unit. Can be small. Since the tray to be transported can be changed by switching the position of the transport means, it is possible to omit the provision of the gate means for switching the paper transport direction. Since the transport means itself has a function of a transport direction switching gate, transport to each tray can be ensured.
[0029]
In addition, in the above configuration, if the driving force is transmitted to one of the rollers, the driving force is transmitted to the other roller by the stretched endless belt. Therefore, a member that transmits the driving force to both the rollers is provided. Since it can be omitted, the number of parts can be reduced. Since an endless belt is mounted between the rollers to convey the sheet, it is possible to omit providing a sheet guide between both rollers provided along the conveying direction.
[0030]
In the post-processing apparatus, the first transport member and the second transport member can be individually moved to the first position and the second position around the rotation fulcrum, and the first transport member is moved to the first position. When the position and the second transport member are moved to the second position, the sheet transported to the post-processing tray may be set to be aligned by the roller on the downstream side of the second transport member.
[0031]
According to the above configuration, for example, if the second conveying member is set below the first conveying member, the sheet conveyed on the post-processing tray by the first conveying member and the second conveying member is the first It passes over the upper side of both rollers of the conveying member. Thereafter, after the sheet is conveyed to the post-processing tray, the position of the first conveying member and the second conveying member in the conveying unit that conveys the sheet onto the post-processing tray is switched to change the position on the downstream side of the second conveying member. The lower side of the roller can be brought into contact with the upper surface of the paper on the post-processing tray.
[0032]
At this time, by rotating the roller in the same direction as when the sheet is conveyed, the sheet can be moved in the opposite direction with respect to the sheet conveying direction and brought into contact with, for example, the rear side surface in the post-processing tray. Therefore, it is not necessary to provide special alignment means in the paper transport direction. Further, when used in combination with other sheet conveying direction aligning means, it is possible to more reliably align the sheets in the post-processing tray.
[0033]
In order to solve the above-described problems, the post-processing apparatus according to the present invention performs post-processing such as stapling on a plurality of sheets on the post-processing tray for the sheets discharged from the image forming apparatus. In the post-processing apparatus for discharging the post-processed sheet bundle onto a paper discharge tray disposed below the post-processing tray, whether or not the paper discharge tray is at the upper limit for storing the paper bundle is determined. And detecting means for detecting, and when the discharge tray is at the upper limit of storage by the detecting means and there is a succeeding sheet from the image forming apparatus, the succeeding sheet is placed on the post-processing tray for one job and thereafter And a control means for stopping the image forming process in a state where the processing is performed and the post-processed sheet bundle is dropped on the paper discharge tray and the paper bundle is placed on the post-processing tray. It is characterized by having.
[0034]
According to the above configuration, since the paper discharge tray is positioned below the post-processing tray, the width of the post-processing device can be reduced, and the paper bundle group on the paper discharge tray and the paper bundle on the post-processing tray can be reduced. Because it stops after creating, the loading capacity at the time of post-processing can be utilized to the maximum.
[0035]
In the post-processing apparatus, it is preferable that the control unit drops the post-processed paper bundle that has been post-processed onto the paper discharge tray when the paper bundle on the paper discharge tray becomes less than the upper storage limit. .
[0036]
In the above configuration, it is not necessary for the operator to put his hand into the post-processing tray and take out the post-processed paper, so that the operator is not bothered. Since it is not necessary for the operator to put the hand into the post-processing tray and take out the post-processed paper, it is possible to avoid the danger to the operator due to putting the operator's hand into the post-processing tray.
[0037]
In the post-processing apparatus, the control unit may cancel the stop of the image forming process and the post-processing when there is a subsequent sheet.
[0038]
According to the above configuration, the once stopped image forming process and post-processing are automatically resumed, so that the operator does not need a special operation and the operator's trouble is saved.
[0039]
The post-processing apparatus is further provided with an input unit for inputting cancellation or maintenance of the stop of the image forming process and the post-processing, and the control unit stops the image forming process and the post-processing when there is a subsequent sheet. It may be possible to select by the input means to cancel or maintain.
[0040]
According to the above configuration, since the operator can select the image forming process and the resumption of the post-processing once stopped, it is possible to eliminate the operator's anxiety that the machine suddenly starts to operate.
[0041]
The post-processing apparatus further includes an elevating unit that raises and lowers the paper discharge tray, and the detection unit reduces the distance between the uppermost surface of the paper bundle on the paper discharge tray and the post-processing tray. It is desirable to provide a paper discharge tray control means for controlling the elevating means so as to adjust them together.
[0042]
According to the above configuration, it is possible to save the operator from putting the hand into the post-processing tray and taking out the post-processed sheet bundle. Since there is no need for the operator to put the hand into the post-processing tray and take out the post-processed paper bundle, the danger to the operator due to the operator's hand in the post-processing step such as post-processing is prevented. it can.
[0043]
In the post-processing apparatus, the control unit may cancel the stop of the image forming process and the post-processing when the position adjustment of the paper discharge tray is completed. According to the above configuration, it is not necessary for the operator to put the hand into the post-processing tray and take out the post-processed paper, so that the operator is not bothered.
[0044]
In addition, in the above configuration, there is no danger to the operator because it is not necessary for the operator to put his hand into the post-processing tray and take out the post-processed paper. Since the once stopped image forming process and post-processing are resumed, the operator does not need any special operation.
[0045]
Further, in the above configuration, after raising the discharge tray to the uppermost position, the sheet bundle remaining in the post-processing tray is dropped on the discharge tray and the image forming process and the post-processing are restarted. Can be easily placed on the paper discharge tray.
[0046]
In the post-processing apparatus, the control unit causes the subsequent post-processed paper bundle to be fed to the paper discharge tray after a predetermined time when the paper stack of the paper discharge tray is less than the upper storage limit and there is no subsequent paper. It may be made to fall.
[0047]
According to the above configuration, it is not necessary for the operator to put the hand into the post-processing tray and take out the post-processed paper, so that the operator is not bothered. Further, in the above configuration, the post-processing tray There is no danger to the operator because there is no need for the operator to put his hand inside and remove the post-processed paper.
[0048]
In addition, in the above configuration, when the paper on the paper discharge tray is removed after the paper is full and there is no subsequent paper, the paper bundle remaining on the post-processing tray is removed regardless of the height of the paper discharge tray. Since it is dropped on the paper discharge tray, the operator can immediately hold the paper bundle.
[0049]
Further, in the above configuration, when the paper on the paper discharge tray is removed and the paper bundle left on the post-processing tray is immediately dropped, the paper bundle is also formed at the timing when the operator lifts the paper in the paper discharge tray. There is a possibility that it will fall, which may cause the group of lifted paper bundles to collapse, or the dropped paper bundles to fall into an unpredictable location. Can be dropped and does not cause anxiety to the operator.
[0050]
In order to solve the above-described problems, the post-processing apparatus according to the present invention performs post-processing such as stapling on a plurality of sheets on the post-processing tray for the sheets discharged from the image forming apparatus. In the post-processing apparatus for discharging the post-processed sheet bundle onto a paper discharge tray disposed below the post-processing tray, whether or not the paper discharge tray is at the upper limit for storing the paper bundle is determined. And detecting means for detecting, and when the discharge tray is at the upper limit of storage by the detecting means and there is a succeeding sheet from the image forming apparatus, the succeeding sheet is placed on the post-processing tray for one job and thereafter And a control unit for dropping the post-processed sheet bundle onto the paper discharge tray and stopping the image forming process with the post-processing tray open.
[0051]
According to the above configuration, since the paper discharge tray is positioned below the post-processing tray, the width of the post-processing device can be reduced, and the paper bundle group on the paper discharge tray and the paper bundle on the post-processing tray can be reduced. Since it stops after being dropped onto the paper discharge tray, the maximum loading capacity during post-processing can be used.
[0052]
In addition, in the above configuration, even when the last sheet bundle hits the post-processing tray, the post-processing tray is stopped in an open state, so that the final sheet bundle can be satisfactorily placed on the discharge tray.
[0053]
Further, in the above configuration, it is not necessary for the operator to put his hand into the post-processing tray and take out the post-processed paper, so that the operator is not bothered. Since it is not necessary for the operator to put his hand into the post-processing tray and remove the post-processed paper, there is no danger to the operator.
[0054]
In the post-processing apparatus, the control means preferably closes the post-processing tray in the open state when the sheet bundle in the paper discharge tray becomes less than the upper storage limit.
[0055]
According to the above configuration, even when the last sheet bundle hits the post-processing tray, the post-processing tray is stopped in the open state, so that the sheet bundle can be satisfactorily placed on the discharge tray. . Since the post-processing tray is closed after removing the paper bundle from the paper discharge tray, it is possible to avoid a problem that the paper bundle is caught on the post-processing tray.
[0056]
In the post-processing apparatus, it is preferable that the control unit cancels the stop of the image forming process and the post-processing when there is a subsequent sheet. According to the above configuration, once stopped, the image forming process and post-processing are automatically restarted, so that a special operation by the operator can be omitted.
[0057]
The post-processing apparatus is further provided with an input unit for inputting cancellation or maintenance of the stop of the image forming process and the post-processing, and the control unit stops the image forming process and the post-processing when there is a subsequent sheet. It may be possible to select by the input means to cancel or maintain.
[0058]
According to the above configuration, since the operator can select the image forming process and the resumption of the post-processing once stopped, it is possible to eliminate the operator's anxiety that the machine suddenly starts to operate.
[0059]
The post-processing apparatus further includes an elevating unit that raises and lowers the paper discharge tray. The detecting unit adjusts the distance between the top surface of the paper bundle on the paper discharge tray and the post-processing tray to the fall of the paper bundle. A discharge tray control means for controlling the lifting means so as to adjust the height of the sheet, and the control means moves the discharge tray to the uppermost position and closes the post-processing tray when the image forming process and The post-processing stop may be canceled.
[0060]
According to the above configuration, it is not necessary for the operator to put the hand into the post-processing tray and take out the post-processed paper, so that the operator is not bothered. Since it is not necessary for the operator to put his hand into the post-processing tray and remove the post-processed paper, there is no danger to the operator.
[0061]
In addition, in the above configuration, once stopped, the image forming process and post-processing are automatically restarted, so that the operator does not need any special operation and the image is raised after raising the discharge tray to the uppermost position. Since the forming process and the post-processing are restarted, the subsequent paper can be easily placed on the paper discharge tray.
[0062]
In order to solve the above-described problem, the post-processing apparatus according to the present invention performs post-processing such as stapling on a plurality of sheets on the post-processing tray for the sheets discharged from the image forming apparatus. In the post-processing apparatus that drops the post-processed sheet bundle onto a paper discharge tray disposed below the post-processing tray and discharges the paper bundle, an elevating unit that raises and lowers the paper discharge tray is provided. A detecting means for detecting the distance between the upper surface of the sheet bundle of the tray and the post-processing tray is provided, and a control means for controlling the elevating means drops the paper bundle from the post-processing tray to the discharge tray. It is characterized by being provided so as to change according to the number of post-processing.
[0063]
According to the above configuration, since the drop of the paper from the post-processing tray to the paper discharge tray is changed according to the number of the rear sheets, the placement of the paper on the paper discharge tray can be stabilized. When there are a small number of sheets and a large number of sheets, there will be a difference in the ability to place the paper on the output tray due to the air resistance of the falling paper. The placement on the discharge tray can be stabilized.
[0064]
In the above configuration, since the paper discharge tray is positioned below the post-processing tray, the width of the post-processing device can be reduced.
[0065]
In the post-processing apparatus, when the sheet bundle is dropped from the post-processing tray onto the paper discharge tray, the control unit sets the distance between the upper surface of the paper discharge tray and the post-processing tray opening on the post-processing tray. It may be set to be equal to or greater than the number of sheets.
[0066]
In the above configuration, the interval between the post-processing tray and the discharge tray is set to be equal to or greater than the thickness of the number of sheets placed on the post-processing tray. Therefore, the stackability of the sheet bundle on the sheet discharge tray can be improved.
[0067]
In the post-processing apparatus, when the sheet is dropped from the post-processing tray, the control unit reduces the distance between the uppermost surface of the stack of sheets already stacked on the paper discharge tray and the opening of the post-processing tray. It may be set to be equal to or greater than the thickness of the number of sheets placed on the processing tray. According to the above configuration, the sheet bundle that has been post-processed on the post-processing tray can be reliably dropped onto the sheet discharge tray, so that the placement property of the sheet bundle on the sheet discharge tray can be improved.
[0068]
In the post-processing apparatus, the post-processing tray has each bottom plate that is divided into two from the center at the bottom of the post-processing tray, and each bottom plate is placed on the post-processing tray. In order to drop the stacked sheet bundle onto the sheet discharge tray, it is preferable that the sheet bundle slides in a direction perpendicular to the sheet conveyance direction and opens in opposite directions.
[0069]
According to the above configuration, the bottom plate of the post-processing tray opens from the central portion, and the paper bundle on the post-processing tray is dropped from the central portion to the paper discharge tray. Therefore, the paper bundle falls in a horizontal posture and is discharged. The stacking state of the sheet bundle on the paper tray can be improved.
[0070]
Further, in the above configuration, since the bottom plate of the post-processing tray is slid and opened from the central portion, the interval between the post-processing tray and the paper discharge tray can be narrowed, the drop of the sheet bundle can be reduced, The stacking state of the sheet bundle can be improved.
[0071]
In addition, in the above configuration, the post-processed paper is dropped by opening the bottom plate of the post-processing tray onto the paper discharge tray located below the post-processing tray. This means is unnecessary.
[0072]
The post-processing apparatus preferably further includes a display unit that displays the status of the processing steps such as stop and restart of image forming processing and post-processing. According to the above-described configuration, it is possible to display a method of restarting the image forming process and post-processing that has been stopped once, so that it is easy to understand what the operator should do next.
[0073]
Further, in the above configuration, since the stop of the image forming process and the post-processing is disclosed after the paper on the paper discharge tray is removed, it can be displayed that the image forming process and the post-processing are resumed. After removing the paper, you can see how the machine works and reduce the operator's anxiety.
[0074]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the post-processing apparatus according to the present invention will be described below with reference to FIGS. As shown in FIG. 1, the post-processing apparatus 1 receives a sheet 10 discharged from the image forming apparatus 2 by an entrance roller 3 of the post-processing apparatus 1, switches a transport direction by a transport direction switching gate 4, and performs unprocessed processing. A paper discharge tray 5 or a staple tray (post-processing tray) 7 is discharged. Such a staple tray 7 has a loading surface that is inclined with the entrance side of the paper 10 being lowered.
[0075]
In the post-processing apparatus 1, as will be described later, the paper 10 is stapled with respect to the lifted tray (discharge tray) 6 for placing the post-processed paper 10 and a bundle of paper 10 (paper bundle). It is also possible to directly discharge without placing on the tray 7. About each roller used by this Embodiment, the outer peripheral surface shall be covered with elastic members, such as a silicone rubber.
[0076]
The unprocessed paper discharge tray 5 is a tray for stacking the paper 10 discharged from the image forming apparatus 2 in a state where the paper 10 is discharged from the discharge roller 1a without post-processing on the paper 10.
[0077]
The elevating tray 6 is a tray used for discharging a bundle of sheets 10 subjected to stapling processing or stacking / discharging a large amount of discharged matter (printed sheets). The 6a side is lowered and inclined.
[0078]
The elevating tray 6 is provided directly below the staple tray 7, and an endless wire (elevating means) 6b attached to the tray base end 6a is driven by a motor (elevating means) 6c. It can be moved up and down freely. As a control means for controlling the motor 6c, for example, a microcomputer (not shown) is incorporated.
[0079]
The paper 10 to be stapled in the post-processing apparatus 1 is placed and aligned on the staple tray 7 (the alignment method will be described later), and then stapled by the stapler 8 so that the paper 10 after stapling is processed. It becomes a bunch of. Subsequently, the bundle of sheets 10 is dropped onto the lifting tray 6 and transferred to a position where it can be easily taken out from the outside.
[0080]
Alternatively, when the paper 10 is discharged onto the lift tray 6 without the stapling process, the transport means 9 upstream of the staple tray 7 (upstream in the transport direction of the paper 10) directly feeds the paper 10 to the lift tray 6. It can also be transported.
[0081]
The bundle of sheets 10 subjected to the stapling process is dropped onto the lift tray 6 positioned below the staple tray 7 by opening the sheet support plate 7a that forms the bottom (each bottom plate) of the staple tray 7.
[0082]
Next, the paper alignment on the staple tray 7 and the configuration for dropping the paper 10 from the staple tray 7 to the lift tray 6 will be described with reference to FIGS. FIG. 2 shows the staple tray 7 at the time of paper alignment. In FIG. 2A, the conveyance direction of the paper 10 is a direction orthogonal to the paper surface. Moreover, FIG.2 (b) is AA arrow sectional drawing in Fig.2 (a).
[0083]
The staple tray 7 has a sheet support plate (bottom plate) 7a divided from the center at the bottom of the staple tray 7 and a sheet 10 in the width direction (perpendicular to the transport direction of the sheet 10, and , Two alignment plates (alignment portions) 7b aligned in the direction along the surface of the paper 10, and a sheet support plate 7a and a member (staple tray top plate 7c) for supporting the alignment plate 7b. .
[0084]
Each paper support plate 7a is formed in a substantially L shape so that the paper 10 can be placed thereon, and the bottom surfaces thereof (the placement surfaces of the paper 10) are flush with each other, and each paper support plate The rear surfaces of 7a are installed so as to face each other in a substantially vertical direction, and are movable in the horizontal direction so that the interval can be changed.
[0085]
In other words, each of the paper support plates 7 a has a carry-out path 7 f for dropping a bundle of paper 10 placed on the staple tray 7 onto the lifting tray 6. For example, it is formed so as to slide along the surface of 10 in a direction substantially parallel to the surface. In the above description, the bottom portion of the staple tray 7 is divided into two parts from the central part. However, the staple tray 7 may be formed so as to be divided into three or more parts.
[0086]
Each alignment plate 7b is movable in the horizontal direction so as to be parallel to each other along the conveyance direction of the sheet 10 and so that the interval can be changed.
[0087]
Initially, the paper support plate 7a and the alignment plate 7b stand by in a stationary state at a position corresponding to the paper size (the paper support plate 7a is paper width + β, and the alignment plate 7b is paper width + α: β> α). . The paper 10 placed on the staple tray 7 is supported and placed on the paper support plate 7a between the two alignment plates 7b.
[0088]
Each time a sheet 10 is conveyed onto the staple tray 7, the aligning plate 7b reciprocates between the sheet size width and the position (sheet width + α) opened from the first sheet size width to make the sheet 10 wider. Match the direction (direction perpendicular to the transport direction). That is, α is the amplitude of the matching plate 7b.
[0089]
Further, the alignment plate 7b aligns the width direction of the paper 10, but for alignment in the conveyance direction of the paper 10, for example, a blade-like paddle 11 (see FIG. 1) made of an elastic member such as rubber. This is implemented by the rear end plate 7d.
[0090]
That is, a rear end plate 7d is provided on the side of the paper 10 where the staple processing is performed (in FIG. 1, the upstream side in the paper conveyance direction), and each time the paper 10 is conveyed onto the staple tray 7, 11 is rotated halfway, the paper 10 is made to flow backward and conveyed so as to press against the rear end plate 7d, and the end of the paper 10 is aligned. Thereafter, when a predetermined number of sheets 10 are placed on the staple tray 7, the end portions of the aligned sheets 10 are bound by the stapler 8.
[0091]
At the time of paper alignment described above, the length of the paper placement portion (L-shaped bottom plate portion) of the paper support plate 7a is constant, and the position of the paper support plate 7a changes according to the paper size. In the central portion of the tray 7 (between the two paper support plates 7a), it is clear that an opening occurs when the paper size is larger than the minimum size, but even at a position corresponding to the paper 10 of the minimum size. An opening 7 e may be formed at the center of the staple tray 7.
[0092]
By providing such an opening 7e, the opening stroke when the sheet supporting plate 7a is opened to drop the bundle of sheets 10 can be shortened, and the processing time for moving by dropping can be shortened.
[0093]
Further, the width (interval) of the opening 7e is set to 10% at most when the stacked paper 10 is the minimum width (for example, B5), and at most at the maximum width (for example, A3). By setting it to 46%, the bundle of sheets 10 in the staple tray 7 can be stacked on each sheet support plate 7a while preventing the bundle of sheets 10 from being bent.
[0094]
When dropping the stapled paper 10 from the staple tray 7 to the lift tray 6, the paper support plate 7a of the staple tray 7 is moved from the center of the paper 10 in the left-right direction (horizontal direction and paper) as shown in FIG. The carry-out path 7f through which the paper 10 can be dropped is formed by sliding it away from each other in the direction perpendicular to the conveyance direction 10).
[0095]
At this time, each paper support plate 7a moves from the position in the standby state to the inner position of the alignment plate 7b (the movement distance is γ). As a result, the paper 10 starts to fall from the center, and finally, the entire bundle of paper 10 falls on the lifting tray 6. Further, when the bundle of sheets 10 is dropped, each alignment plate 7b is maintained so as to be at the same position as the sheet size width, so that it becomes a drop guide for the bundle of sheets 10. Further, at this time, the rear end plate 7d is moved in the conveyance direction of the paper 10 (direction of arrow C in FIG. 3B), which is the direction of pushing out the paper 10, and assists in dropping.
[0096]
Further, as shown in FIG. 4, the guide members 7h extending along the dropping direction of the paper 10 in the paper dropping openings 7g of the paper supporting plates 7a in the staple tray 7 are parallel to each other. It is also possible to guide the fall of the paper 10 to the lifting tray 6 by the alignment plates 7b and the guide members 7h.
[0097]
As shown in FIG. 5, the staple tray top plate 7c, which is a support member for the paper support plate 7a and the alignment plate 7b, moves the paper support plate 7a and the alignment plate 7b to positions corresponding to the size of the paper 10, respectively. The drive units 12 and 13 are respectively provided.
[0098]
With respect to the staple tray top plate 7c, the paper support plate 7a and the alignment plate 7b are disposed on the lower surface side of the staple tray top plate 7c. On the upper surface side of the staple tray top plate 7c, rack gears 12a and 13a for moving the sheet support plate 7a and the alignment plate 7b are arranged as the drive units 12 and 13, respectively. The rack gears 12a, 13a, the paper support plate 7a, and the alignment plate 7b are connected to each other by screws or the like via a fixture.
[0099]
The staple tray top plate 7c is provided with grooves 12b and 13b along the sliding direction of the paper support plate 7a and the alignment plate 7b, and the fixture is fitted in the grooves 12b and 13b. The movement of the alignment plate 7b in the sliding direction is guided. The grooves 12b and 13b are formed for the movement stroke of the paper support plate 7a and the alignment plate 7b.
[0100]
Further, the rack guides 12c and 13c formed on the staple tray top plate 7c guide the movement of the rack gears 12a and 13a in the sliding direction. The paper support plate 7a and the alignment plate 7b of the staple tray 7 are driven by separate motors, and the rotation of the motors is transmitted by the pinion gears 12d and 13d, respectively. The driving forces of the pinion gears 12d and 13d are similarly transmitted to the pair of rack gears 12a and 12a and the pair of rack gears 13a and 13a, respectively. Due to the driving force transmitted to the rack gears 12a and 13a, the pair of paper support plates 7a and the pair of alignment plates 7b attached to the rack gears 12a and 13a are respectively opposite to each other in the left-right direction (width direction). It is designed to move by the same distance.
[0101]
FIG. 6 shows the positional relationship between the paper support plate 7a and the alignment plate 7b in the configuration of the drive units 12 and 13 of the paper support plate 7a and the alignment plate 7b as shown in FIG. In the configuration shown in FIG. 6, two grooves 7 i are formed on the bottom surface of the paper support plate 7 a of the staple tray 7 so as to be parallel to each other and perpendicular to the conveyance direction of the paper 10. Convex portions 7j are respectively provided at the lower ends of the alignment plates 7b so as to match the grooves 7i of the paper support plate 7a.
[0102]
A certain amount of gap is required between the lower end surface of the alignment plate 7b and the bottom surface of the paper support plate 7a so that the alignment plate 7b can be easily moved when the paper 10 on the staple tray 7 is aligned in the width direction. .
[0103]
From this, the convex portions 7j of the alignment plates 7b protrude downward into the grooves 7i until a predetermined number of sheets 10 to be stapled are input from the bottom plate of the paper support plate 7a. The sheet 10 is aligned in the width direction by the convex portions 7j facing each other.
[0104]
When more than a certain amount of paper 10 is inserted between the alignment plates 7b, the more than a certain amount of paper 10 reaches each facing surface that is a flat portion other than the convex portion 7j in each alignment plate 7b. Alignment in the width direction of each sheet 10 entered is performed by the convex portion 7j of the alignment plate 7b and each of the opposing surfaces.
[0105]
In FIG. 6, the incoming side of the paper 10 is the right side of the figure. Further, the groove 7i of the sheet support plate 7a and the convex portion 7j of the alignment plate 7b can be used as a guide in the moving direction of the alignment plate 7b.
[0106]
Next, a transport mechanism for transporting the paper 10 discharged from the image forming apparatus 2 and transported to the staple tray 7 side to the staple tray 7 or the lifting tray 6 will be described.
[0107]
As described above, in the post-processing apparatus 1, when the paper 10 is conveyed to the staple tray 7 side, when the staple processing is performed on the paper 10, the paper 10 is once discharged onto the staple tray 7 and stapled. When the paper 10 is discharged onto the lift tray 6 without being processed, the transport means 9 upstream of the staple tray 7 transports the paper 10 directly to the lift tray 6.
[0108]
For this reason, the said conveyance means 9 has the 1st conveyance member 19 and the 2nd conveyance member 29 along with the up-down direction, as shown in FIG. The first conveying member 19 has rollers 19b and 19c disposed at both ends of a sheet guide 19a serving as a guide for conveying the sheet 10, and both rollers 19b and 19c are rotatably connected by a timing belt 19d. . The roller 19c is a main driving roller to which driving force is transmitted, and the roller 19b is a driven roller driven by the roller 19c via a timing belt 19d.
[0109]
On the other hand, the second transport member 29 is provided below the first transport member 19, and rollers 29b and 29c are disposed at both ends of a paper guide 29a serving as a guide for transporting the paper 10, respectively. , 29c are rotatably connected by a timing belt 29d. The roller 29c is a main driving roller to which a driving force is transmitted, and the roller 29b is a driven roller driven by the roller 29c via a timing belt 29d.
[0110]
At this time, the roller 19c on the paper feeding side of the first conveying member 19 and the roller 29c on the paper feeding side of the second conveying member 29 form a nip, that is, the rollers 19c and 29c are parallel to each other, and The contact is made in a pressed state along the rotation axis direction. Here, it is assumed that the upper roller 19c in which the nip is formed is a driving roller (a paper entry side roller 19c of the first conveying member 19). Further, the positions of the first transport member 19 and the second transport member 29 can be switched by means such as a solenoid, for example, and the positions of the first transport member 19 and the second transport member 29 are switched using the axes of the rollers 19c and 29c on the paper-feeding side as rotation axes. As a result, the following three operations can be performed.
[0111]
First, when the paper 10 is discharged onto the staple tray 7, the first and second transport members 19 and 29 are in the positions shown in FIG. 8 (both are in the upper positions), and each roller 19c on the paper entry side that forms a nip. , 29c is discharged onto the staple tray 7 by the guides of the paper guides 19a, 29a of the first and second transport members 19, 29. After the sheet 10 is discharged to the staple tray 7, as shown in FIG. 9, the position of the roller 29b on the output side of the second conveying member 29 in contact with the upper surface of the sheet 10 every time one sheet 10 is discharged. Moved to (downward position).
[0112]
Thus, the uppermost sheet 10 is pressed against the rear end plate 7d by the conveying force of the roller 29b on the sheet output side of the second conveying member 29, and the rear end of the sheet 10 is aligned. In the above description, the alignment of the trailing edge of the sheet 10 is performed by the paddle 11. However, the alignment of the sheet 10 using the paddle 11 is merely an example, and the alignment of the sheet 10 on the output side of the second conveying member 29 is described above. When the sheet 10 is aligned using the roller 29b, the paddle 11 can be used together or omitted.
[0113]
When all the paper 10 is placed on the staple tray 7 and the staple processing is performed on the paper 10, the paper support plate 7a at the bottom of the staple tray 7 is opened, and the paper 10 is dropped onto the lifting tray 6. This is as already explained. At this time, as shown in FIG. 10, the rear end plate 7d moves to assist the fall of the paper 10, but the first and second transport members 19 and 29 interfere with the movement of the rear end plate 7d. Both are controlled so as to be in the upper position so that there is no occurrence.
[0114]
Next, when the paper 10 is discharged onto the lifting tray 6 without being stapled, the first and second transport members 19 and 29 are in the positions shown in FIG.
[0115]
The staple tray 7 is provided with an elongated hole-shaped opening 7k extending in a direction perpendicular to the transport direction of the paper 10 for transporting the paper 10 to the lifting tray 6 without being placed on the staple tray 7. On the side where the rear end plate 7 d is provided in the opening 7 k, one roller 7 m is arranged so that its rotation axis is perpendicular to the conveyance direction of the paper 10. The opening 7k may be set so as to be shared with the groove 7i.
[0116]
The roller 19b on the paper delivery side of the first conveying member 19 moved to the lower position forms a nip with the roller 7m, and this nip faces the opening 7k of the staple tray 7, whereby the paper 10 is It can be conveyed directly to the lifting tray 6 without going through the staple tray 7.
[0117]
Since the paper 10 can be directly conveyed to the elevating tray 6 that moves up and down in this way, even if the amount of the paper 10 to be conveyed increases, it will be described later according to the amount of the paper 10 on the elevating tray 6. By lowering the elevating tray 6 as described above, all the conveyed paper 10 can be stably stored and placed on the elevating tray 6.
[0118]
The roller 7m on the side where the rear end plate 7d of the opening 7k is provided may be a driving roller (main driving roller) or a driven roller. However, in the case of a driving roller, the sheet 10 shown in FIG. Rotating when the paper is dropped, it is possible to assist in dropping and transporting the paper 10 to the lift tray 6.
[0119]
By the way, Japanese Patent Laid-Open No. 59-78069 discloses a configuration in which a paper stacking tray for discharging stapled paper is disposed immediately below the staple tray, thereby reducing the width of the post-processing device. can do.
[0120]
However, in the configuration of the above publication, means for conveying paper from the staple tray to the paper stacking tray is required, and the paper may be discharged to the paper stacking tray even when the stapling process is not performed. For this reason, however, a conveyance path for directly conveying the sheet from the image forming apparatus to the sheet stacking tray is provided. That is, in the configuration of the above publication, three conveyance paths are necessary: a conveyance path from the image forming apparatus to the staple tray, a conveyance path from the staple tray to the paper stacking tray, and a conveyance path from the image forming apparatus to the paper stacking tray. There is a problem that the size of the conveyance path and the conveyance means in each conveyance path are increased.
[0121]
In JP-A-1-214576, JP-A-2-28470, and JP-A-8-277059, paper stapled on the staple tray is dropped onto the stacking tray and the sheets are stacked from the staple tray. A configuration is disclosed in which a conveying unit that conveys a sheet to a tray is omitted.
[0122]
However, in the configurations of these publications, the paper cannot be directly conveyed onto the stacking tray without going through the staple tray, and when the paper is discharged to the stacking tray without performing the stapling process, the transport time is greatly increased. It has caused problems such as increasing.
[0123]
On the other hand, in the configuration of the present invention, as described above, the first and second transport members 19 and 29 that rotate between the first position and the second position are provided. The number of the sheet 10 can be reduced, the configuration of the conveying means 9 can be simplified, and the conveyance time of the sheet 10 can be shortened even when the staple process is omitted and the sheet 10 is discharged to the lifting tray 6.
[0124]
The drive of the said 1st and 2nd conveyance members 19 and 29 is demonstrated below using FIG. The first conveying member 19 has rollers 19b and 19c arranged at both ends of a paper guide 19a, and both rollers 19b and 19c are connected to each other by a timing belt 19d via a timing pulley 19e.
[0125]
Switching of the first conveying member 19 to the upper position / lower position is performed by the first solenoid 14. That is, when the first conveying member 19 is held in the upper position, the first solenoid 14 is turned OFF, and the rotation shaft of the roller 19c on the paper input side is supported by the spring 19f attached to the paper guide 19a. The 1st conveyance member 19 rotates upwards with the paper guide 19a.
[0126]
When the first conveying member 19 is moved to the lower position, the first conveying member 19 is rotated downward together with the sheet guide 19a about the rotation axis of the roller 19c on the paper entering side by turning on the first solenoid 14. Move (see FIG. 12).
[0127]
In the second conveying member 29, rollers 29b and 29c are disposed at both ends of the paper guide 29a, and both rollers 29b and 29c are rotatably connected by a timing belt 29d via a timing pulley 29e.
[0128]
The second solenoid 15 is used to switch the second transport member 29 between the upper position and the lower position. That is, when the second conveying member 29 is held at the upper position, the rotation axis of the paper-inside roller 29c is turned off by the spring 29f attached to the actuator of the second solenoid 15 by turning off the second solenoid 15. The second conveying member 29 is rotated upward together with the paper guide 29a with the fulcrum as a fulcrum.
[0129]
When the second conveying member 29 is moved to the lower position, the second solenoid 15 is turned on, so that the second conveying member 29 is rotated downward together with the paper guide 29a around the rotation axis of the roller 29c on the paper receiving side. Move (see FIG. 13). Note that the configurations of the first and second transport members 19 and 29 are not limited to the above. For example, as shown in FIG. 14, upstream of the first and second transport members 19 and 29. A configuration may be adopted in which a paper guide is omitted between the two rollers on the side (paper input side) and the downstream side (paper output side), and an endless conveying belt 39 is stretched (stretched).
[0130]
FIG. 15 shows an operation panel of the image forming apparatus 2. As shown in FIG. 15, the operation panel 16 is used to input the number of images to be formed using the numeric keypad 16a. When the staple processing is executed in the post-processing apparatus 1, the staple processing selection key 16b is turned on.
[0131]
At this time, the first display lamp 16c is turned on. When the lifting tray 6 is used without performing the stapling process, the lifting tray selection key 16d is turned on. At this time, the second display lamp 16e is turned on. When the lifting tray 6 is selected, the stapling process is not performed, so the first display lamp 16c is turned off. When stapling is selected, the second display lamp 16e is turned off because the lifting tray 6 is automatically used.
[0132]
When neither the staple processing nor the lifting tray selection is performed, the unprocessed discharge tray 5 that is discharged without performing the post-processing shown in FIG. 1 is automatically selected. After various settings, the image forming process (image forming operation) is started by turning on the copy start button 16f. The operation panel 16 is provided with a character display portion 16g and a number display portion 16h.
[0133]
In the post-processing apparatus 1, the bundle of sheets 10 on which the staple processing has been performed, the lifting tray 6 is dropped from the staple tray 7, but the top surface of the bundle of sheets 10 placed on the lifting tray 6 and the staples are stapled. By controlling the distance (head) with respect to the tray 7 by, for example, the aforementioned control means so as to be always constant (that is, the minimum distance), stable stacking of the sheets 10 on the elevating tray 6 can be realized.
[0134]
Even when the stapling process is not performed, if the discharge destination of the paper 10 is designated as the lift tray 6, the lift tray 6 needs to be driven and controlled. The raising / lowering operation | movement of the raising / lowering tray 6 is demonstrated below.
[0135]
In the drive / control of the lifting tray 6, the distance between the upper surface of the lifting tray 6 or the uppermost surface of the bundle of sheets 10 on the lifting tray 6 and the staple tray 7 is controlled to be constant within a predetermined range, for example. Therefore, as shown in FIGS. 16 and 17, an upper surface detection unit 17 that detects the upper surface of the elevating tray 6 is provided, and the elevating operation of the elevating tray 6 is controlled by ON / OFF of the upper surface detection unit 17. It has become. At this time, the character display unit 16g of the operation panel 16 displays information such as the operation state in characters, and the number display unit 16h displays numbers such as the set number of input (see FIG. 15).
[0136]
As shown in FIGS. 31 and 32, the upper surface detection unit 17 includes a detection unit main body 17a, which is a substantially U-shaped support body having a recess, an upper surface detection actuator 17b, and an optical detection unit 17c. ing. The upper surface detection actuator 17b has a substantially U-shaped detection tip portion and a base end portion as a balancer connected to each other, and is detected at the connection portion between the detection tip portion and the base end portion. An upper surface detection actuator 17b is attached to the part main body 17a so that the upper surface detection actuator 17b is rotatable, and a base end portion of the upper surface detection actuator 17b is moved in the recess. The optical detection unit 17c is provided in the recess so as to detect the movement of the upper surface detection actuator 17b by the connection / disconnection of the optical path accompanying the movement of the base end portion of the upper surface detection actuator 17b.
[0137]
When there is no paper 10 on the lifting tray 6, as shown in FIG. 16, the upper surface detection unit 17 b detects the upper surface of the lifting tray 6 by contacting the upper surface detection actuator 17 b of the lifting tray 6 with the side of the lifting tray 6. 17 is turned on and stopped. At this time, the distance between the upper surface of the elevating tray 6 and the staple tray 7 is L. Further, a paper presence / absence sensor 20 is provided on the bottom surface on the rear end plate 7d side of the staple tray 7 to detect the presence or absence of the paper 10 on the staple tray 7 or by optical detection (FIG. 33 and FIG. 33). (See FIG. 34). As the paper presence / absence sensor 20, a sensor having the same configuration and operation as the upper surface detection unit 17 described above can be used.
[0138]
FIG. 17A shows a state in which a bundle of sheets 10 has dropped onto the lifting tray 6 in the state shown in FIG. At this time, the upper surface detection actuator 17b of the lifting tray 6 is in contact with the side of the lifting tray 6, and the upper surface detection unit 17 that detects the upper surface of the lifting tray 6 is turned on and stopped. The distance between the upper surface of the upper bundle of sheets 10 and the staple tray 7 is (the distance obtained by subtracting the thickness of the bundle of sheets 10 from the distance L, that is, the bundle thickness of the L sheet 10).
[0139]
In FIG. 17B, the elevating tray 6 is lowered from the state of FIG. 17A until the upper surface detection unit 17 is turned off. And if the upper surface detection part 17 turns OFF, the movement of the raising / lowering tray 6 will be stopped. In FIG. 17C, the lift tray 6 is raised again from the state of FIG. 17B, and the top surface detection actuator 17 b of the lift tray 6 comes into contact with the bundle of sheets 10 on the lift tray 6 to turn on the top surface detection unit 17. State and stop.
[0140]
As a result, the distance between the upper surface of the bundle of sheets 10 on the lifting tray 6 and the staple tray 7 becomes L again. At this time, if the distance L between the elevating tray 6 and the staple tray 7 is set to be larger than the thickness of the staple tray 7 according to the maximum number of staples processed, the bundle of sheets 10 on the staple tray 7 can have various thicknesses. Even if it changes, it can be reliably dropped on the lifting tray 6.
[0141]
A method (flow) for setting the post-processing mode in the post-processing apparatus described above will be described below based on the flowchart in FIG. First, it is detected whether or not the staple processing is selected (step 1, hereinafter, step is abbreviated as S), and when the staple processing is selected, in order to transport the paper 10 to the staple tray 7, the transport is performed as described above. The means 9 is selected and controlled (S2) to complete the mode selection.
[0142]
On the other hand, if not selected, it is subsequently detected whether or not to select transport of the paper 10 to the lifting tray 6 (S3). If selected, the transport of the paper 10 to the lifting tray 6 is performed as described above. Then, the conveying means 9 is selected and controlled (S4) to complete the mode selection.
[0143]
When the conveyance of the sheet 10 to the lifting tray 6 is not selected, the conveyance to the tray other than the staple tray 7 and the lifting tray 6, for example, the unprocessed discharge tray 5 is selected, and the sheet 10 is transferred to the unprocessed discharge tray 5. As described above, the transfer direction switching gate 4 is controlled (S5) to complete the mode selection.
[0144]
Next, each post-processing method of the post-processing apparatus will be described with reference to FIGS. 19 to 24 as follows. First, as shown in FIG. 19, after setting the post-processing mode shown in FIG. 18 (S11), it is detected whether or not the copy start button 16f is turned on (S12). If not detected, the process returns to S12. If detected, it is subsequently detected whether or not staple processing is selected (S13).
[0145]
When the stapling process is selected, each paper support plate 7a of the staple tray 7 is moved from the standby position (denoted as HP in the figure) to an interval position where the width of the used paper 10 is + β (S14). Next, each alignment plate 7b of the staple tray 7 is moved from the standby position (HP) to an interval position where the width of the used paper 10 is + α (S15). However, β> α.
[0146]
Thereafter, the paper discharge sensor 18 (see FIGS. 16, 33 and 34) for detecting whether or not the paper 10 is discharged onto the staple tray 7 is ON (paper 10 is discharged) or OFF (paper 10). (S16), if it is OFF, the process returns to S16 and waits. If it is ON, the paddle 11 is rotated (S17) as shown in the flowchart of FIG. The second solenoid 15 is turned on (S18), and then the second solenoid 15 is turned off (S19). The paper discharge sensor 20 may have the same configuration and operation as the upper surface detection unit 17 described above.
[0147]
Next, each alignment plate 7b is moved from the width 10 of the paper 10 to the width of the paper 10 to align the paper 10 (S20). Subsequently, each alignment plate 7b is changed from the width of the paper 10 to the width of the paper 10. Move to + α (S21). Thereafter, it is determined whether or not the sheet 10 conveyed to the staple tray 7 is the final sheet (S22). If it is not the final sheet, the process returns to S16 and is conveyed by repeating the above steps. Each sheet 10 on the staple tray 7 is aligned for each sheet 10.
[0148]
If the aligned sheet 10 is the final sheet in S22, the staple processing is performed on the aligned bundle of sheets 10 in the staple tray 7 (S23). Thereafter, whether or not the uppermost position is set in the lifting tray 6 is detected based on whether or not the above-described upper surface detection unit 17 is ON (S24). The process returns to S24 (S25).
[0149]
If the elevating tray 6 is at the uppermost position or reaches, the staple tray 7 is opened (S26), and then the staple tray 7 is closed (S27) as shown in the flowchart of FIG. Thereafter, the elevating tray 6 is lowered (S28), and it is detected whether or not the upper surface detection unit 17 is OFF (S29). If not, the elevating tray 6 is lowered until it is turned OFF, and is turned OFF. Subsequently, the elevating tray 6 is raised (S30).
[0150]
At this time, it is detected whether or not the upper surface detection unit 17 is ON (S31). If it is not ON, the elevating tray 6 is raised until it is ON. When turned ON, the lifting tray 6 is stopped (S32). Thereafter, it is determined whether or not the bundle of sheets 10 conveyed to the elevating tray 6 is the final number (S33). If the number is not the final number, the process returns to S16 and the above steps are repeated to obtain the necessary number. Staple processing is performed for each bundle of sheets 10 conveyed up to the number of copies, and the sheets are placed on the lifting tray 6. If the bundle of sheets 10 subjected to stapling is the final number in S33, the post-processing process is completed.
[0151]
Next, when the stapling process is not selected in S13 shown in FIG. 19, it is subsequently detected whether or not the conveyance of the paper 10 to the lifting tray 6 is selected as shown in FIG. (S41).
[0152]
When the conveyance of the sheet 10 to the lifting tray 6 is not selected, the conveyance to the tray other than the staple tray 7 and the lifting tray 6, for example, the unprocessed discharge tray 5 is selected, and the sheet 10 is transferred to the unprocessed discharge tray 5. As described above, the transport direction switching gate 4 is controlled (S42) to determine whether the transported paper 10 is the final JOB paper (S43). Returning, if it is the last JOB paper, the conveyance and copying are completed.
[0153]
When the conveyance of the paper 10 to the elevating tray 6 is selected, in order to convey the paper 10 to the elevating tray 6, the first solenoid 14 and the second solenoid 15 are respectively turned on as described above (S44), and the elevating tray 6 Is detected by ON / OFF of the upper surface detection unit 17 (S45). If it is not ON, the elevating tray 6 is raised to ON (S46). The paper 10 is conveyed to the lifting tray 6 (S47), and then the lifting tray 6 is lowered (S48).
[0154]
Thereafter, it is detected whether or not the upper surface detector 17 is OFF (S49). The elevator tray 6 is lowered until it is turned OFF, and when it is turned OFF, the elevator tray 6 is raised (S50). Is detected by ON / OFF of the upper surface detection unit 17 (S51). If not, the elevator tray 6 is raised until it is turned ON, and if it is ON or ON, the elevator tray 6 is stopped ( S52).
[0155]
It is determined whether or not the sheet 10 conveyed to the elevating tray 6 is the final JOB paper (S53). If not, the process returns to S47, and if it is the final JOB paper, the first solenoid 14 and the second solenoid. 15 is turned off (S54), and conveyance and copying are completed.
[0156]
Next, the operation of releasing the staple tray in S27 shown in FIG. 21 will be described with reference to FIG. First, each alignment plate 7b is moved (S61), it is determined whether or not each alignment plate 7b has a sheet width (S62), and each alignment plate 7b is moved until each alignment plate 7b has a sheet width. When each alignment plate 7b reaches the sheet width, the movement of each alignment plate 7b is stopped (S63).
[0157]
Subsequently, each paper support plate 7a is moved (S64), and the front end position of each paper support plate 7a is moved from the position in the standby state to the inside position of the alignment plate 7b, that is, a bundle of paper 10 Is moved to a position where it can be dropped (this moving distance is γ) (S65), and then the movement of each paper support plate 7a is stopped (S66).
[0158]
Next, the rear end plate 7d is moved from the standby position (HP) to the paper 10 extrusion position (S67), and the bundle of post-processed paper 10 is dropped from the staple tray 7 to the lift tray 6.
[0159]
At this time, the presence / absence sensor 20 of the staple tray 7 detects the presence / absence of the bundle of sheets 10 on the staple tray 7 (S68). If the bundle of sheets 10 remains, the process returns to S61 again. The above steps are repeated to ensure the conveyance of the bundle of sheets 10 on the staple tray 7 by dropping onto the lifting tray 6.
[0160]
Next, the operation of closing the staple tray in S28 shown in FIG. 21 will be described with reference to FIG. First, each alignment plate 7b is moved (S71), and it is determined whether each alignment plate 7b has reached the paper width + α (standby position) (S72), and each alignment plate 7b is adjusted until the alignment plate 7b becomes the paper width + α. When the plate 7b is moved and each of the alignment plates 7b reaches the sheet width + α, the movement of each alignment plate 7b is stopped (S73).
[0161]
Subsequently, each paper support plate 7a is moved (S74), and each paper support plate 7a is moved to the position of paper width + β, that is, moved to a position where the bundle of paper 10 can be supported (S75). Thereafter, the movement of each paper support plate 7a is stopped (S76). Next, the trailing end plate 7d is moved to the standby position (HP) (S77), and the closing operation of the staple tray 7 is completed.
[0162]
Next, FIG. 25 to FIG. 27 show post-processing methods when the lifting tray 6 is filled with a bundle of sheets 10 that have been stapled during stapling.
[0163]
First, as shown in FIG. 25, whether or not the lifting tray 6 is full is detected by detecting whether the lower limit detection (not shown) of the lifting tray 6 is ON and the upper surface detection unit 17 that detects the uppermost position of the lifting tray 6. It is executed by detecting when it is turned on.
[0164]
At this time, it is determined whether or not there is a subsequent sheet 10 (S81). If the sheet 10 does not exist, the post-processing method is completed. On the other hand, if the sheet 10 is present, the staple tray 7 has the ability to load one job, so the image forming process is continued, and the sheet 10 for one job is sequentially conveyed to the staple tray 7 (S82). The final sheet 10 is loaded on the staple tray 7 and stacked (S83). After the staple process (S84), the image forming process is stopped (S85).
[0165]
Further, it is determined whether or not there is a subsequent sheet 10 (S86). If there is no subsequent sheet 10, the presence or absence of a bundle of sheets 10 on the lifting tray 6 is detected, the position of the lifting tray 6 is detected, and the sheet 10 is detected. A determination is made by a sensor (not shown) for detecting presence / absence (S87). If there is a sheet 10, the process returns to S87 until the sheet 10 is removed. The routine for opening the staple tray (S61 to S68, see FIG. 23) is executed (S88), and then the routine for opening the second staple tray described later is executed to complete this post-processing method.
[0166]
On the other hand, in S86, if there is a subsequent sheet 10, the fact that there is a subsequent sheet 10 is displayed on the character display portion 16g (FIG. 15) of the operation panel 16 (S90) to notify the operator. At this time, the processing method for the subsequent paper 10 may be displayed on the character display portion 16g. For example, “Please remove the stack of paper in the lifting tray”, “When the paper in the lifting tray is removed, the subsequent image forming process and stapling process will resume.” It will be easier to understand if you do.
[0167]
After S90, the presence / absence of a bundle of sheets 10 on the lifting tray 6 is determined by a sensor (not shown) that detects the position of the lifting tray 6 and the presence / absence of the sheet 10 (S91). If it is determined that there is no bundle of sheets 10 by removing the bundle of sheets 10 on the lifting tray 6 according to an instruction from the character display unit 16g or the like, the operator returns to S91 until it is removed. The elevating tray 6 is raised (S92).
[0168]
At this time, the position of the elevating tray 6 is detected by turning on the upper surface detector 17 as described above (S93), and the elevating tray 6 is raised to the uppermost position, that is, the position where the upper surface detector 17 is turned on. The lifting tray 6 is stopped (S94).
[0169]
Thereafter, the first staple tray opening routine (S61 to S68, see FIG. 23) is executed (S95), and the bundle of sheets 10 in the staple tray 7 loaded before the image forming process is stopped is moved up and down. Then, the staple tray is dropped (S71 to S77, see FIG. 24) (S96), and the staple tray 7 is moved to a position corresponding to the paper width. The remaining image forming process that has been stopped is resumed.
[0170]
If the automatic continuation of the image forming process is set in advance for resuming the image forming process (S97), the remaining image forming process is automatically restarted when the image forming process is ready to continue. . If automatic continuation of the image forming process is not set, the image forming process is resumed by turning on the copy start button 16f (S98). The automatic continuation setting of the image forming process may be set at the initial setting stage of the apparatus, or may be selected and set together with the display of the succeeding paper presence display when the image forming process is stopped.
[0171]
If the lifting tray 6 is full of a bundle of sheets 10 and there is no further succeeding sheet when the apparatus is stopped, the staple tray 7 is opened after the sheet 10 on the lifting tray 6 is removed and left on the staple tray 7. The bundle of sheets 10 is dropped onto the lifting tray 6 and the staple tray 7 is returned to the HP to enter a standby state. At this time, after confirming that there is no sheet 10 on the lifting tray 6, the sheet 10 bundle remaining in the staple tray 7 can be dropped after waiting for a predetermined time, that is, several seconds later.
[0172]
Next, the routine for opening the second staple tray will be described with reference to FIG. First, when this routine is started, each paper support plate 7a of the staple tray 7 is moved to HP (S101), then each alignment plate 7b is moved to HP (S102), and then the rear end plate 7d. Moves to HP (S103), and this routine is completed.
[0173]
According to the post-processing method described above, since the bundle of sheets 10 on the lifting tray 6 and the bundle of sheets 10 on the staple tray 7 are created, the image forming process and the staple process are stopped. To make the most of it.
[0174]
In the following, another post-processing method when the lifting tray is full during stapling will be described with reference to FIGS. 28 and 29. In this post-processing method, the first staple shown in FIGS. 25 and 26 is used. This means that the tray opening routine (S95) is executed between the staple processing (S84) and the stop (S85), and therefore the first staple tray opening routine (S88) is omitted.
[0175]
As a result, in the post-processing method, the bundle of sheets 10 on the lifting tray 6 and the bundle of sheets 10 on the staple tray 7 are dropped onto the lifting tray 6 and then stopped. And can be satisfactorily placed on the lifting tray 6 up to the final bundle of sheets 10.
[0176]
In addition, in the above post-processing method, even when the upper surface of the bundle group of the sheets 10 is in contact with the staple tray 7, the staple tray 7 is stopped in the open state, so that the bundle group of sheets 10 is excellent on the lifting tray 6. Can be placed.
[0177]
Further, in the above processing method, it is not necessary for the operator to put a hand into the staple tray 7 where the inside cannot be visually checked and take out the bundle of sheets 10 that have been stapled. Annoying the operator can be avoided.
[0178]
Further, in the above processing method, it is not necessary for the operator to put the hand into the staple tray 7 and take out the bundle of the stapled papers 10 by hand, so that the needle portion like the stapler 8 in the staple tray 7 is used. It is possible to prevent the operator from being injured by touching or protruding the protruding portion.
[0179]
Next, another post-processing method for adjusting the uppermost position of the elevating tray 6 according to the number of staples of each sheet 10 in the staple tray 7 will be described as follows. First, in the present embodiment, it is assumed that the maximum possible number of staples is 50, for example, and the position of the elevating tray 6 can be adjusted in five steps in increments of 10 sheets. For example, the number of staples is set by the initial setting using the numeric keypad 16a of the operation panel 16. The adjustment amount of the lifting tray 6 is determined according to the set number of sheets.
[0180]
As shown in FIG. 30, when the number of staples is determined to be 41 to 50 (S111), the adjustment amount is set to 0 (S112), and the distance between the upper surface of the lifting tray 6 and the staple tray 7 is shown in FIG. The distance L is indicated by 16.
[0181]
Subsequently, when the number of staples is determined to be 31 to 40 (S113), the adjustment amount is set to 1 (S114), and when it is determined to be 21 to 30 sheets (S115), the adjustment amount is set to 2l. Then, when it is determined that there are 11 to 20 sheets (S117), the adjustment amount is set to 3l (S118), and for 10 sheets or less, the adjustment amount is set to 4l (S119).
[0182]
If the adjustment amount l is set by a value converted into the rotation amount of the motor that moves the lifting tray 6, etc., it is determined whether or not the uppermost position detection of the lifting tray 6 is ON (S120). When the tray 6 is raised (S121) and is ON or ON, the position of the elevating tray 6 is the adjustment amount = 0, so if the set adjustment amount is 0, the elevating tray 6 is moved up and down. While the raising of the tray 6 is stopped, if the set adjustment amount is other than 0 (S122), it is raised by the adjustment amount (S123), and the raising of the elevating tray 6 is stopped.
[0183]
At this time, if the rotation of the motor 6c is controlled in accordance with the adjustment amount with reference to the lifting tray 6 at the position where the adjustment amount = 0, the distance between the upper surface of the lifting tray 6 and the staple tray 7 (L one adjustment amount). ) Can be adjusted. By setting the position of the elevating tray 6 in this way, it is ensured that the bundle of sheets 10 set in the above-mentioned number of sheets, which has been stapled, is dropped onto the elevating tray 6 at the adjusted position. And can be stabilized.
[0184]
In the above, as post-processing, the stapling process, that is, the process of binding a bundle of sheets 10 with a U-shaped metal wire is described. However, the post-processing is not limited to the above, but other binding processes, for example, using a clip Binding processing, binding processing by forming a semicircular cut and pushing the cut portion, binding processing by forming a hole and binding with a ring-shaped metal ring or thread, and notches for each bundle of sheets 10 A binding process may be used in which the shape of the part, for example, a semicircular, triangular, or quadrangular cutout is formed and / or the position of the cutout is shifted.
[0185]
By the way, Japanese Patent Application Laid-Open No. 62-79160 discloses a configuration in which when a normal paper discharge tray becomes full, the conveyance path is switched by a gate and discharged to another paper discharge tray.
[0186]
In the configuration of the above publication, since a means for switching the conveyance path and another conveyance path are required, the mechanism is complicated, and it is assumed that problems such as paper jam are likely to occur.
[0187]
Japanese Patent Application Laid-Open No. 11-116134 discloses a configuration in which after a paper discharge tray is detected to be full, the paper is discharged to the paper discharge tray until a predetermined number of sheets are reached and then stopped.
[0188]
In the configuration of the above publication, when stapling is performed and the sheet is discharged to the discharge tray, it is necessary to count all the sheets to be stapled and always compare whether or not the predetermined number of sheets has been reached, which complicates the control. Further, when the number of staples exceeds the predetermined number, a part of the staples is not processed and the apparatus is stopped.
[0189]
On the other hand, in the configuration of the present invention, by providing the transport means 9 and the lifting tray 6 as described above, the transport means 9 can be selected and controlled, and the transport mechanism of the paper 10 can be simplified. Generation | occurrence | production can be reduced and the said inconvenience can be suppressed by raising / lowering the raising / lowering tray 6. FIG.
[0190]
【The invention's effect】
As described above, the post-processing apparatus of the present invention is provided with the post-processing tray for performing post-processing on a plurality of sheets, and the paper output tray for discharging the post-processed sheet bundle is the post-processing tray. The post-processing tray is disposed at the bottom of the post-processing tray, and has a bottom plate that is divided from the center of the post-processing tray, and each base plate is placed on the post-processing tray. In this configuration, a carry-out path for dropping the bundle of paper sheets onto the paper discharge tray is formed by sliding along the paper surface placed on the post-processing tray.
[0191]
Therefore, in the above configuration, since the paper discharge tray is positioned below the post-processing tray, it is possible to carry out the unloading of the sheet bundle from the post-processing tray to the paper discharge tray, and to carry out the unloading for unloading. Since the means can be omitted, the post-processing apparatus can be reduced in size and simplified.
[0192]
In addition, in the above configuration, each bottom plate of the post-processing tray slides from the central portion to form a carry-out path, and the paper bundle on the post-processing tray is dropped from the central portion to the paper discharge tray. The sheet can be dropped while maintaining a horizontal posture, and the loaded state of the sheet bundle on the sheet discharge tray can be improved.
[0193]
In addition, in the above configuration, each bottom plate of the post-processing tray slides from the central portion along the paper surface of the sheet bundle to form a carry-out path, so that the interval between the post-processing tray and the paper discharge tray can be narrowed. As a result, the drop of the sheet bundle can be reduced, and the effect that the sheet bundle placed on the paper discharge tray can be improved is achieved.
[0194]
As described above, the post-processing apparatus according to the present invention performs post-processing on a plurality of sheets on the post-processing tray, and a paper discharge tray from which the post-processed sheet bundle is carried out from the post-processing tray. A raising / lowering unit that is disposed below the post-processing tray and moves the discharge tray in the vertical direction is provided, and a control unit that controls the lifting / lowering unit drops a stack of sheets from the post-processing tray onto the discharge tray. It is the structure provided so that it may control.
[0195]
Therefore, in the above configuration, by providing the raising / lowering means and the control means, the drop of the sheet bundle from the post-processing tray to the paper discharge tray can be set constant within a predetermined range, for example. There is an effect that the stacking of the sheet bundle on the tray can be further stabilized.
[0196]
According to still another post-processing apparatus of the present invention, a first transport member and a second transport member that transport paper discharged from the image forming apparatus to a post-processing tray or a paper discharge tray are respectively provided at both ends of the paper guide. In this configuration, rollers are arranged, both rollers are rotatably connected by a driving member, and are rotatably provided together with a sheet guide with an upstream roller shaft as a fulcrum.
[0197]
Therefore, in the above configuration, when both the first transport member and the second transport member are set to the first position, the sheet can be discharged onto the post-processing tray, and the first transport member and the second transport member are In both cases, when the second position is turned downward from the first position, the sheet can be discharged onto the discharge tray.
[0198]
Therefore, in the above configuration, the sheet is dropped from the post-processing tray to the discharge tray below the post-processing tray, and the sheet can be conveyed to the post-processing tray or the discharge tray using each common conveying member. Since the width can be reduced and the tray to be transported can be changed by switching the position of each transport member, it is possible to omit the provision of gate means for switching the transport direction of the paper, and each transport member itself has a transport direction switching gate. Since it has a function, there is an effect that the transport to each tray can be ensured.
[0199]
Still another post-processing apparatus according to the present invention includes a detecting unit that detects whether or not a paper discharge tray is at a storage upper limit of a sheet bundle, and that the discharge tray is at a storage upper limit by the detection unit, and image formation is performed. When there is a succeeding sheet from the apparatus, the succeeding sheet is placed on the post-processing tray for one job, the post-processing is performed, and the dropping of the post-processed sheet bundle to the discharge tray is stopped, And a control unit that stops the image forming process in a state where the sheet bundle is placed on the post-processing tray.
[0200]
Therefore, in the above configuration, since the paper discharge tray is positioned below the post-processing tray, the width of the post-processing device can be reduced, and the sheet bundle group on the paper discharge tray and the paper on the post-processing tray can be reduced. Since it stops after creating a bundle, the loading capacity at the time of post-processing can be used to the maximum, and the post-processing can be made more efficient.
[0201]
Still another post-processing apparatus according to the present invention includes a detecting unit that detects whether or not a paper discharge tray is at a storage upper limit of a sheet bundle, and that the discharge tray is at a storage upper limit by the detection unit, and image formation is performed. When there is a succeeding sheet from the apparatus, the succeeding sheet is loaded on the post-processing tray for one job, the post-processing is performed, and the post-processed sheet bundle is dropped to the discharge tray, and the post-processing tray And a control means for stopping the image forming process in a state in which is opened.
[0202]
Therefore, in the above configuration, even when the last sheet bundle hits the post-processing tray, the post-processing tray is stopped in the open state, so that the final sheet bundle can be satisfactorily placed on the discharge tray.
[0203]
Further, in the above configuration, it is not necessary for the operator to put his hand into the post-processing tray and take out the post-processed paper, so that the operator is not bothered. Since it is not necessary for the operator to put his hand into the post-processing tray and remove the post-processed paper, there is an effect that the operator is not dangerous.
[0204]
Still another post-processing apparatus of the present invention is provided with lifting means for raising and lowering the discharge tray, and provided with detection means for detecting the distance between the upper surface of the sheet bundle of the discharge tray and the post-processing tray. The control means for controlling the means is configured to drop the sheet bundle from the post-processing tray to the paper discharge tray, and to change the drop according to the number of post-processing sheets.
[0205]
Therefore, in the above-described configuration, the drop of the paper from the post-processing tray to the paper discharge tray is changed according to the number of rear sheets, so that the paper placement on the paper discharge tray can be stabilized. When there are a small number of sheets and a large number of sheets, there will be a difference in the ability to place the paper on the output tray due to the air resistance of the falling paper. There is an effect that the placement on the discharge tray can be stabilized.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a post-processing apparatus according to an embodiment of the present invention.
FIGS. 2A and 2B are schematic configuration diagrams of a staple tray at the time of paper alignment in the post-processing apparatus, in which FIG. 2A is a front view and FIG. 2B is a cross-sectional view taken along line AA in FIG.
FIGS. 3A and 3B are schematic configuration diagrams of the staple tray when a sheet is dropped, in which FIG. 3A is a front view, and FIG. 3B is a cross-sectional view taken along line BB in FIG.
FIG. 4 is a schematic configuration diagram of the staple tray having a guide member.
FIG. 5 is a perspective view of a main part showing a driving unit for an alignment plate and a paper support plate in the staple tray.
FIG. 6 is a schematic perspective view showing a positional relationship and a driving relationship between a pair of alignment plates and a pair of paper support plates in the staple tray.
FIG. 7 is a perspective view of a conveying unit in the post-processing apparatus.
FIG. 8 is a schematic configuration diagram illustrating conveyance to a staple tray in the conveyance unit.
FIG. 9 is a schematic configuration diagram illustrating a sheet alignment operation of the transport unit.
FIG. 10 is a schematic configuration diagram illustrating an operation of the transport unit when a sheet is dropped.
FIG. 11 is a schematic configuration diagram illustrating an operation of transporting a sheet to a lifting tray in the transport unit.
FIG. 12 is a schematic configuration diagram showing a first transport unit of the transport unit.
FIG. 13 is a schematic configuration diagram showing a second transport unit of the transport unit.
FIG. 14 is a schematic configuration diagram showing another conveying means in the post-processing apparatus.
FIG. 15 is a schematic configuration diagram of an operation panel in the image forming apparatus connected to the post-processing apparatus.
FIG. 16 is an explanatory diagram showing an operation of the lifting tray when a sheet bundle is not placed in the post-processing apparatus.
FIGS. 17A and 17B are explanatory views showing other operations of the elevating tray, wherein FIG. 17A shows the operation when the sheet bundle is placed on the elevating tray, and FIG. 17B shows the operation of the sheet bundle on the elevating tray. FIG. 2C shows a state where it is detected that the tray is placed, and FIG. 3C shows a state where the lifting tray is lowered by detection.
FIG. 18 is a flowchart showing a procedure for setting a post-processing mode in the post-processing apparatus.
FIG. 19 is a part of a flowchart for explaining the operation of the post-processing apparatus.
FIG. 20 is another part of the flowchart.
FIG. 21 is still another part of the flowchart.
FIG. 22 is still another part of the flowchart.
FIG. 23 is still another part of the flowchart.
FIG. 24 is still another part of the flowchart.
FIG. 25 is a part of a flowchart illustrating another operation of the post-processing apparatus.
FIG. 26 is another part of the flowchart.
FIG. 27 is still another part of the flowchart.
FIG. 28 is a part of a flowchart illustrating still another operation of the post-processing apparatus.
FIG. 29 is another part of the flowchart.
FIG. 30 is a flowchart illustrating still another operation of the post-processing device.
FIG. 31 is a perspective view of an upper surface detection actuator provided on the lifting tray of the post-processing apparatus.
FIG. 32 is an exploded perspective view of the upper surface detection actuator.
FIG. 33 is a schematic configuration diagram illustrating a paper discharge sensor and a paper presence / absence sensor provided in a paper discharge conveyance path and a staple tray of the post-processing apparatus.
FIG. 34 is a schematic configuration diagram showing operations of the paper discharge sensor and the paper presence sensor.
[Explanation of symbols]
6 Lifting tray (output tray)
7 Staple tray (post-processing tray)
7a Paper support plate (bottom plate)
10 paper

Claims (27)

In a post-processing device that performs post-processing on a plurality of sheets on a post-processing tray for paper discharged from the image forming apparatus, and discharges the post-processed sheet bundle onto a paper discharge tray.
The paper discharge tray is located below the post-processing tray,
The post-processing tray has each bottom plate that is divided from the center at the bottom of the post-processing tray,
Each bottom plate slides along the sheet surface placed on the post-processing tray to form a carry-out path for dropping the sheet bundle placed on the post-processing tray onto the paper discharge tray. The post-processing apparatus is provided as described above. In a post-processing device that performs post-processing on a plurality of sheets on a post-processing tray for paper discharged from the image forming apparatus, and discharges the post-processed sheet bundle onto a paper discharge tray.
The paper discharge tray is located below the post-processing tray,
Lifting means for moving the discharge tray in the vertical direction is provided,
A post-processing apparatus, wherein the control means for controlling the elevating means is provided so as to control a drop for dropping the sheet bundle from the post-processing tray onto the paper discharge tray. 3. The head for dropping the sheet bundle from the post-processing tray onto the paper discharge tray is set so as to be at least the thickness of the post-processing tray capable of being post-processed. Post-processing device as described. 4. The post-processing apparatus according to claim 1, wherein the bottom plates are set so as to be separated from each other. 5. The post-processing apparatus according to claim 4, wherein an opening interval spaced apart from each other in each bottom plate of the post-processing tray is 10 to 46% of a width of the paper to be placed. An alignment unit that aligns the paper placed on the post-processing tray by contact in the width direction is provided so as to be slidable in a direction perpendicular to the paper conveyance direction in the post-processing tray,
When the alignment unit driving means for driving the alignment unit slides each bottom plate to drop the sheet bundle on the post-processing tray, the contact position of the alignment unit with the sheet bundle is substantially the same as the end of the sheet bundle. 6. The post-processing apparatus according to claim 1, wherein the post-processing apparatus is provided so as to be controlled to a width. 7. A post-processing apparatus according to claim 1, wherein a paper drop guide extending along a paper drop direction is provided at an opening of each bottom plate. The paper discharged from the image forming apparatus is subjected to post-processing such as stapling on a post-processing tray for a plurality of sheets, and the post-processed paper bundle is disposed below the post-processing tray. In a post-processing device that drops and discharges onto a paper tray,
Conveying means for conveying the paper discharged from the image forming apparatus to a post-processing tray or a paper discharge tray is provided having a first conveying member and a second conveying member,
The first and second conveying members are each provided with rollers at both ends of the paper guide, both rollers are rotatably connected by a driving member, and are provided so as to be rotatable together with the paper guide with an upstream roller shaft as a fulcrum. And a roller on the side serving as the rotation fulcrum of the first conveyance member and a roller on the side serving as the rotation fulcrum of the second conveyance member form a nip for conveying the paper with the paper sandwiched therebetween,
When both the first and second transport members are in the first position, the paper can be discharged onto the post-processing tray,
A post-processing device characterized in that when both the first and second transport members are in the second position rotated downward from the first position, the paper can be discharged onto a paper discharge tray. . The paper discharged from the image forming apparatus is subjected to post-processing such as stapling on a post-processing tray for a plurality of sheets, and the post-processed paper bundle is disposed below the post-processing tray. In a post-processing device that drops and discharges onto a paper tray,
Conveying means for conveying the paper discharged from the image forming apparatus to a post-processing tray or a paper discharge tray is provided having a first conveying member and a second conveying member,
Each of the first and second transport members includes two rollers in the paper transport direction and an endless belt that transports the paper stretched between the two rollers, and has an upstream roller shaft. The fulcrum is rotatably provided, and the roller serving as the pivot of the first conveying member and the roller serving as the pivot of the second conveying member sandwich the sheet via the endless belt. Forming a nip for transport,
When both the first and second transport members are in the first position, the paper can be discharged onto the post-processing tray,
A post-processing device characterized in that when both the first and second transport members are in the second position rotated downward from the first position, the paper can be discharged onto a paper discharge tray. . The first transport member and the second transport member can be individually moved to the first position and the second position around the rotation fulcrum,
When the first conveying member is moved to the first position and the second conveying member is moved to the second position, the sheet conveyed to the post-processing tray is aligned by the roller on the downstream side of the second conveying member. The post-processing apparatus according to claim 8, wherein the post-processing apparatus is provided. The paper discharged from the image forming apparatus is subjected to post-processing such as stapling on a post-processing tray for a plurality of sheets, and the post-processed paper bundle is disposed below the post-processing tray. In a post-processing device that drops and discharges onto a paper tray,
Detecting means for detecting whether or not the sheet discharge tray is at a storage upper limit of the sheet bundle;
When the sheet discharge tray is at the upper limit of storage by the detecting means and there is a subsequent sheet from the image forming apparatus, the subsequent sheet is placed on the post-processing tray for one job and post-processing is performed. And a control unit for stopping the image forming process in a state where the sheet bundle is placed on the post-processing tray while stopping the dropping of the sheet bundle onto the paper discharge tray. Post-processing device to do. 12. The control unit according to claim 11, wherein when the sheet bundle in the sheet discharge tray becomes less than the upper limit of storage, the control unit drops the subsequent post-processed sheet bundle to the sheet discharge tray. Post-processing device. 13. The post-processing apparatus according to claim 12, wherein when there is a subsequent sheet, the control unit cancels the stop of the image forming process and the post-processing. Input means for inputting the release or maintenance of the stop of the image forming process and post-processing is provided,
13. The post-processing apparatus according to claim 12, wherein when there is a subsequent sheet, the control unit can select by the input unit to cancel or maintain the stop of the image forming process and the post-processing. Elevating means for elevating and lowering the paper discharge tray is provided,
Discharge tray control means for controlling the elevating means is provided so that the distance between the uppermost surface of the sheet bundle on the sheet discharge tray and the post-processing tray is adjusted by the detection means in accordance with the fall of the sheet bundle. The post-processing apparatus according to claim 11, wherein the post-processing apparatus is provided. 16. The post-processing apparatus according to claim 15, wherein the control unit cancels the stop of the image forming process and the post-processing when the position adjustment of the paper discharge tray is completed. The control means is configured to drop the subsequent post-processed sheet bundle onto the sheet discharge tray after a predetermined time when the sheet bundle in the sheet discharge tray is less than the storage upper limit and there is no subsequent sheet. The post-processing apparatus according to any one of claims 11 to 16, A plurality of sheets are subjected to post-processing such as stapling on the post-processing tray for the sheets discharged from the image forming processing apparatus, and the post-processed sheet bundle is disposed below the post-processing tray. In a post-processing device that drops and discharges onto a paper discharge tray,
Detecting means for detecting whether or not the sheet discharge tray is at a storage upper limit of the sheet bundle;
When the sheet discharge tray is at the upper limit of storage by the detecting means and there is a subsequent sheet from the image forming apparatus, the subsequent sheet is placed on the post-processing tray for one job and post-processing is performed. And a control means for dropping the sheet bundle onto the paper discharge tray and stopping the image forming process in a state where the post-processing tray is opened. 19. The post-processing apparatus according to claim 18, wherein the control means is configured to close the post-processing tray in the opened state when the sheet bundle in the paper discharge tray becomes less than the upper storage limit. 20. The post-processing apparatus according to claim 19, wherein the control means cancels the stop of the image forming process and the post-processing when there is a subsequent sheet. Input means for inputting the release or maintenance of the stop of the image forming process and post-processing is provided,
20. The post-control unit according to claim 18 or 19, wherein the control unit can select by the input unit to cancel or maintain the stop of the image forming process and the post-processing when there is a subsequent sheet. Processing equipment. Elevating means for elevating and lowering the paper discharge tray is provided,
A discharge tray control means for controlling the elevating means to adjust the distance between the uppermost surface of the sheet bundle on the discharge tray and the post-processing tray by the detection means according to the fall of the sheet bundle;
19. The control means releases the stop of the image forming process and the post-processing when the paper discharge tray is moved to the uppermost position and the post-processing tray is closed. Thru | or the post-processing apparatus in any one of 21. The paper discharged from the image forming apparatus is subjected to post-processing such as stapling on a post-processing tray for a plurality of sheets, and the post-processed paper bundle is disposed below the post-processing tray. In a post-processing device that drops and discharges onto a paper tray,
Elevating means for elevating and lowering the paper discharge tray is provided,
Detection means for detecting the distance between the upper surface of the sheet bundle of the paper discharge tray and the post-processing tray is provided;
A post-processing apparatus, wherein the control means for controlling the elevating means is provided so as to change a drop for dropping the sheet bundle from the post-processing tray to the paper discharge tray in accordance with the number of post-processing sheets. The control unit sets the distance between the upper surface of the paper discharge tray and the opening of the post-processing tray to be equal to or greater than the thickness of the number of sheets placed on the post-processing tray when dropping the sheet bundle from the post-processing tray onto the paper discharge tray. The post-processing apparatus according to claim 23, wherein When dropping the paper from the post-processing tray, the control means determines the distance between the uppermost surface of the sheet bundle already stacked on the paper discharge tray and the opening of the post-processing tray as the number of sheets placed on the post-processing tray. The post-processing apparatus according to claim 23, wherein the post-processing apparatus is set to be equal to or greater than the thickness. The post-processing tray has each bottom plate that is divided into two parts from the center at the bottom of the post-processing tray,
Each bottom plate slides in a direction perpendicular to the paper transport direction and opens in opposite directions so as to drop the sheet bundle placed on the post-processing tray onto the paper discharge tray. The post-processing apparatus according to any one of claims 23 to 25, wherein 27. A post-processing apparatus according to claim 1, further comprising display means for displaying a status of the processing steps such as start, stop, and restart of image forming processing and post-processing.

Images